Mercurial > dropbear
changeset 1318:10e2a7727253 coverity
merge coverity
| author | Matt Johnston <matt@ucc.asn.au> |
|---|---|
| date | Fri, 22 Jul 2016 00:08:02 +0800 |
| parents | 7d02b83c61fd (current diff) 2c9dac2d6707 (diff) |
| children | b90da477ab63 |
| files | .travis.yml |
| diffstat | 80 files changed, 1585 insertions(+), 1020 deletions(-) [+] |
line wrap: on
line diff
--- a/.hgsigs Fri Mar 18 22:47:33 2016 +0800 +++ b/.hgsigs Fri Jul 22 00:08:02 2016 +0800 @@ -20,3 +20,5 @@ 5bb5976e6902a0c9fba974a880c68c9487ee1e77 0 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 926e7275cef4f4f2a4251597ee4814748394824c 0 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 fd1981f41c626a969f07b4823848deaefef3c8aa 0 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 +70705edee9dd29cd3d410f19fbd15cc3489313e2 0 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 +9030ffdbe5625e35ed7189ab84a41dfc8d413e9c 0 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
--- a/.hgtags Fri Mar 18 22:47:33 2016 +0800 +++ b/.hgtags Fri Jul 22 00:08:02 2016 +0800 @@ -52,3 +52,5 @@ 79a6ef02307d05cb9dda10465cb5b807baa8f62e DROPBEAR_2015.70 9a944a243f08be6b22d32f166a0690eb4872462b DROPBEAR_2015.71 78b12b6549be08b0bea3da329b2578060a76ca31 DROPBEAR_2016.72 +309e1c4a87682b6ca7d80b8555a1db416c3cb7ac DROPBEAR_2016.73 +0ed3d2bbf956cb8a9bf0f4b5a86b7dd9688205cb DROPBEAR_2016.74
--- a/.travis.yml Fri Mar 18 22:47:33 2016 +0800 +++ b/.travis.yml Fri Jul 22 00:08:02 2016 +0800 @@ -16,7 +16,9 @@ script: - autoconf && autoheader && ./configure CFLAGS="-O2 -Wall -Wno-pointer-sign" --prefix="$HOME/inst" - - make -j3 install + - make -j3 + # avoid concurrent install, osx/freebsd is racey (https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=208093) + - make install env: global:
--- a/CHANGES Fri Mar 18 22:47:33 2016 +0800 +++ b/CHANGES Fri Jul 22 00:08:02 2016 +0800 @@ -1,3 +1,35 @@ +2016.74 - 21 July 2016 + +- Security: Message printout was vulnerable to format string injection. + + If specific usernames including "%" symbols can be created on a system + (validated by getpwnam()) then an attacker could run arbitrary code as root + when connecting to Dropbear server. + + A dbclient user who can control username or host arguments could potentially + run arbitrary code as the dbclient user. This could be a problem if scripts + or webpages pass untrusted input to the dbclient program. + +- Security: dropbearconvert import of OpenSSH keys could run arbitrary code as + the local dropbearconvert user when parsing malicious key files + +- Security: dbclient could run arbitrary code as the local dbclient user if + particular -m or -c arguments are provided. This could be an issue where + dbclient is used in scripts. + +- Security: dbclient or dropbear server could expose process memory to the + running user if compiled with DEBUG_TRACE and running with -v + + The security issues were reported by an anonymous researcher working with + Beyond Security's SecuriTeam Secure Disclosure www.beyondsecurity.com/ssd.html + +- Fix port forwarding failure when connecting to domains that have both + IPv4 and IPv6 addresses. The bug was introduced in 2015.68 + +- Fix 100% CPU use while waiting for rekey to complete. Thanks to Zhang Hui P + for the patch + + 2016.73 - 18 March 2016 - Support syslog in dbclient, option -o usesyslog=yes. Patch from Konstantin Tokarev
--- a/Makefile.in Fri Mar 18 22:47:33 2016 +0800 +++ b/Makefile.in Fri Jul 22 00:08:02 2016 +0800 @@ -24,6 +24,10 @@ LIBTOM_LIBS=$(STATIC_LTC) $(STATIC_LTM) endif +ifneq ($(wildcard localoptions.h),) +CFLAGS+=-DLOCALOPTIONS_H_EXISTS +endif + COMMONOBJS=dbutil.o buffer.o dbhelpers.o \ dss.o bignum.o \ signkey.o rsa.o dbrandom.o \ @@ -76,6 +80,8 @@ sbindir=@sbindir@ mandir=@mandir@ +.DELETE_ON_ERROR: + CC=@CC@ AR=@AR@ RANLIB=@RANLIB@ @@ -155,7 +161,6 @@ inst_dropbearmulti: $(addprefix insmulti, $(PROGRAMS)) - # for some reason the rule further down doesn't like $($@objs) as a prereq. dropbear: $(dropbearobjs) dbclient: $(dbclientobjs) @@ -195,18 +200,18 @@ -ln -s dropbearmulti$(EXEEXT) $*$(EXEEXT) $(STATIC_LTC): options.h - cd libtomcrypt && $(MAKE) + $(MAKE) -C libtomcrypt $(STATIC_LTM): options.h - cd libtommath && $(MAKE) + $(MAKE) -C libtommath .PHONY : clean sizes thisclean distclean tidy ltc-clean ltm-clean ltc-clean: - cd libtomcrypt && $(MAKE) clean + $(MAKE) -C libtomcrypt clean ltm-clean: - cd libtommath && $(MAKE) clean + $(MAKE) -C libtommath clean sizes: dropbear objdump -t dropbear|grep ".text"|cut -d "." -f 2|sort -rn @@ -215,7 +220,7 @@ thisclean: -rm -f dropbear dbclient dropbearkey dropbearconvert scp scp-progress \ - dropbearmulti *.o *.da *.bb *.bbg *.prof + dropbearmulti *.o *.da *.bb *.bbg *.prof distclean: clean tidy -rm -f config.h @@ -223,3 +228,11 @@ tidy: -rm -f *~ *.gcov */*~ + +# default_options.h is stored in version control, could not find a workaround +# for parallel "make -j" and dependency rules. +default_options.h: default_options.h.in + echo "# > > > Generated from $^, edit that file instead !" > [email protected] + echo >> [email protected] + $(srcdir)/ifndef_wrapper.sh < $^ > [email protected] + mv [email protected] $@
--- a/agentfwd.h Fri Mar 18 22:47:33 2016 +0800 +++ b/agentfwd.h Fri Jul 22 00:08:02 2016 +0800 @@ -30,7 +30,7 @@ #include "auth.h" #include "list.h" -#ifdef ENABLE_CLI_AGENTFWD +#if DROPBEAR_CLI_AGENTFWD /* An agent reply can be reasonably large, as it can * contain a list of all public keys held by the agent. @@ -50,14 +50,14 @@ extern const struct ChanType cli_chan_agent; -#endif /* ENABLE_CLI_AGENTFWD */ +#endif /* DROPBEAR_CLI_AGENTFWD */ -#ifdef ENABLE_SVR_AGENTFWD +#if DROPBEAR_SVR_AGENTFWD int svr_agentreq(struct ChanSess * chansess); void svr_agentcleanup(struct ChanSess * chansess); void svr_agentset(struct ChanSess *chansess); -#endif /* ENABLE_SVR_AGENTFWD */ +#endif /* DROPBEAR_SVR_AGENTFWD */ #endif /* DROPBEAR_AGENTFWD_H_ */
--- a/algo.h Fri Mar 18 22:47:33 2016 +0800 +++ b/algo.h Fri Jul 22 00:08:02 2016 +0800 @@ -83,9 +83,15 @@ }; enum dropbear_kex_mode { +#if DROPBEAR_NORMAL_DH DROPBEAR_KEX_NORMAL_DH, +#endif +#if DROPBEAR_ECDH DROPBEAR_KEX_ECDH, +#endif +#if DROPBEAR_CURVE25519 DROPBEAR_KEX_CURVE25519, +#endif }; struct dropbear_kex { @@ -96,7 +102,7 @@ const int dh_p_len; /* elliptic curve DH KEX */ -#ifdef DROPBEAR_ECDH +#if DROPBEAR_ECDH const struct dropbear_ecc_curve *ecc_curve; #else const void* dummy; @@ -122,7 +128,7 @@ algo_type * buf_match_algo(buffer* buf, algo_type localalgos[], enum kexguess2_used *kexguess2, int *goodguess); -#ifdef ENABLE_USER_ALGO_LIST +#if DROPBEAR_USER_ALGO_LIST int check_user_algos(const char* user_algo_list, algo_type * algos, const char *algo_desc); char * algolist_string(algo_type algos[]);
--- a/auth.h Fri Mar 18 22:47:33 2016 +0800 +++ b/auth.h Fri Jul 22 00:08:02 2016 +0800 @@ -41,7 +41,7 @@ void svr_auth_pubkey(void); void svr_auth_pam(void); -#ifdef ENABLE_SVR_PUBKEY_OPTIONS +#if DROPBEAR_SVR_PUBKEY_OPTIONS_BUILT int svr_pubkey_allows_agentfwd(void); int svr_pubkey_allows_tcpfwd(void); int svr_pubkey_allows_x11fwd(void); @@ -119,12 +119,12 @@ char *pw_shell; char *pw_name; char *pw_passwd; -#ifdef ENABLE_SVR_PUBKEY_OPTIONS +#if DROPBEAR_SVR_PUBKEY_OPTIONS_BUILT struct PubKeyOptions* pubkey_options; #endif }; -#ifdef ENABLE_SVR_PUBKEY_OPTIONS +#if DROPBEAR_SVR_PUBKEY_OPTIONS_BUILT struct PubKeyOptions; struct PubKeyOptions { /* Flags */
--- a/buffer.c Fri Mar 18 22:47:33 2016 +0800 +++ b/buffer.c Fri Jul 22 00:08:02 2016 +0800 @@ -141,9 +141,10 @@ /* increment the position by incr, negative values are allowed, to * decrement the pos*/ void buf_incrpos(buffer* buf, int incr) { - if (incr > BUF_MAX_INCR || - (unsigned int)((int)buf->pos + incr) > buf->len - || ((int)buf->pos + incr) < 0) { + if (incr > BUF_MAX_INCR + || incr < -BUF_MAX_INCR + || (unsigned int)((int)buf->pos + incr) > buf->len + || ((int)buf->pos + incr) < 0) { dropbear_exit("Bad buf_incrpos"); } buf->pos += incr; @@ -184,7 +185,7 @@ * the next len bytes from that position can be used */ unsigned char* buf_getptr(buffer* buf, unsigned int len) { - if (buf->pos + len > buf->len) { + if (len > BUF_MAX_INCR || buf->pos + len > buf->len) { dropbear_exit("Bad buf_getptr"); } return &buf->data[buf->pos]; @@ -194,7 +195,7 @@ * This allows writing past the used length, but not past the size */ unsigned char* buf_getwriteptr(buffer* buf, unsigned int len) { - if (buf->pos + len > buf->size) { + if (len > BUF_MAX_INCR || buf->pos + len > buf->size) { dropbear_exit("Bad buf_getwriteptr"); } return &buf->data[buf->pos];
--- a/channel.h Fri Mar 18 22:47:33 2016 +0800 +++ b/channel.h Fri Jul 22 00:08:02 2016 +0800 @@ -126,11 +126,11 @@ void common_recv_msg_channel_data(struct Channel *channel, int fd, circbuffer * buf); -#ifdef DROPBEAR_CLIENT +#if DROPBEAR_CLIENT extern const struct ChanType clichansess; #endif -#if defined(USING_LISTENERS) || defined(DROPBEAR_CLIENT) +#if DROPBEAR_LISTENERS || DROPBEAR_CLIENT int send_msg_channel_open_init(int fd, const struct ChanType *type); void recv_msg_channel_open_confirmation(void); void recv_msg_channel_open_failure(void);
--- a/chansession.h Fri Mar 18 22:47:33 2016 +0800 +++ b/chansession.h Fri Jul 22 00:08:02 2016 +0800 @@ -58,7 +58,7 @@ /* Used to set $SSH_CLIENT in the child session. */ char *client_string; -#ifndef DISABLE_X11FWD +#if DROPBEAR_X11FWD struct Listener * x11listener; int x11port; char * x11authprot; @@ -67,13 +67,13 @@ unsigned char x11singleconn; #endif -#ifdef ENABLE_SVR_AGENTFWD +#if DROPBEAR_SVR_AGENTFWD struct Listener * agentlistener; char * agentfile; char * agentdir; #endif -#ifdef ENABLE_SVR_PUBKEY_OPTIONS +#if DROPBEAR_SVR_PUBKEY_OPTIONS_BUILT char *original_command; #endif }; @@ -89,7 +89,7 @@ void cli_send_chansess_request(void); void cli_tty_cleanup(void); void cli_chansess_winchange(void); -#ifdef ENABLE_CLI_NETCAT +#if DROPBEAR_CLI_NETCAT void cli_send_netcat_request(void); #endif
--- a/cli-agentfwd.c Fri Mar 18 22:47:33 2016 +0800 +++ b/cli-agentfwd.c Fri Jul 22 00:08:02 2016 +0800 @@ -24,7 +24,7 @@ #include "includes.h" -#ifdef ENABLE_CLI_AGENTFWD +#if DROPBEAR_CLI_AGENTFWD #include "agentfwd.h" #include "session.h"
--- a/cli-auth.c Fri Mar 18 22:47:33 2016 +0800 +++ b/cli-auth.c Fri Jul 22 00:08:02 2016 +0800 @@ -51,7 +51,7 @@ encrypt_packet(); -#ifdef DROPBEAR_CLI_IMMEDIATE_AUTH +#if DROPBEAR_CLI_IMMEDIATE_AUTH /* We can't haven't two auth requests in-flight with delayed zlib mode since if the first one succeeds then the remote side will expect the second one to be compressed. @@ -78,6 +78,7 @@ char* banner = NULL; unsigned int bannerlen; unsigned int i, linecount; + int truncated = 0; TRACE(("enter recv_msg_userauth_banner")) if (ses.authstate.authdone) { @@ -90,26 +91,29 @@ if (bannerlen > MAX_BANNER_SIZE) { TRACE(("recv_msg_userauth_banner: bannerlen too long: %d", bannerlen)) - goto out; + truncated = 1; + } else { + cleantext(banner); + + /* Limit to 24 lines */ + linecount = 1; + for (i = 0; i < bannerlen; i++) { + if (banner[i] == '\n') { + if (linecount >= MAX_BANNER_LINES) { + banner[i] = '\0'; + truncated = 1; + break; + } + linecount++; + } + } + fprintf(stderr, "%s\n", banner); } - cleantext(banner); - - /* Limit to 25 lines */ - linecount = 1; - for (i = 0; i < bannerlen; i++) { - if (banner[i] == '\n') { - if (linecount >= MAX_BANNER_LINES) { - banner[i] = '\0'; - break; - } - linecount++; - } + if (truncated) { + fprintf(stderr, "[Banner from the server is too long]\n"); } - fprintf(stderr, "%s\n", banner); - -out: m_free(banner); TRACE(("leave recv_msg_userauth_banner")) } @@ -121,21 +125,21 @@ * SSH_MSG_USERAUTH_INFO_REQUEST. */ void recv_msg_userauth_specific_60() { -#ifdef ENABLE_CLI_PUBKEY_AUTH +#if DROPBEAR_CLI_PUBKEY_AUTH if (cli_ses.lastauthtype == AUTH_TYPE_PUBKEY) { recv_msg_userauth_pk_ok(); return; } #endif -#ifdef ENABLE_CLI_INTERACT_AUTH +#if DROPBEAR_CLI_INTERACT_AUTH if (cli_ses.lastauthtype == AUTH_TYPE_INTERACT) { recv_msg_userauth_info_request(); return; } #endif -#ifdef ENABLE_CLI_PASSWORD_AUTH +#if DROPBEAR_CLI_PASSWORD_AUTH if (cli_ses.lastauthtype == AUTH_TYPE_PASSWORD) { /* Eventually there could be proper password-changing * support. However currently few servers seem to @@ -179,7 +183,7 @@ TRACE(("leave recv_msg_userauth_failure, ignored response, state set to USERAUTH_REQ_SENT")); return; } else { -#ifdef ENABLE_CLI_PUBKEY_AUTH +#if DROPBEAR_CLI_PUBKEY_AUTH /* If it was a pubkey auth request, we should cross that key * off the list. */ if (cli_ses.lastauthtype == AUTH_TYPE_PUBKEY) { @@ -187,7 +191,7 @@ } #endif -#ifdef ENABLE_CLI_INTERACT_AUTH +#if DROPBEAR_CLI_INTERACT_AUTH /* If we get a failure message for keyboard interactive without * receiving any request info packet, then we don't bother trying * keyboard interactive again */ @@ -227,19 +231,19 @@ for (i = 0; i <= methlen; i++) { if (methods[i] == '\0') { TRACE(("auth method '%s'", tok)) -#ifdef ENABLE_CLI_PUBKEY_AUTH +#if DROPBEAR_CLI_PUBKEY_AUTH if (strncmp(AUTH_METHOD_PUBKEY, tok, AUTH_METHOD_PUBKEY_LEN) == 0) { ses.authstate.authtypes |= AUTH_TYPE_PUBKEY; } #endif -#ifdef ENABLE_CLI_INTERACT_AUTH +#if DROPBEAR_CLI_INTERACT_AUTH if (strncmp(AUTH_METHOD_INTERACT, tok, AUTH_METHOD_INTERACT_LEN) == 0) { ses.authstate.authtypes |= AUTH_TYPE_INTERACT; } #endif -#ifdef ENABLE_CLI_PASSWORD_AUTH +#if DROPBEAR_CLI_PASSWORD_AUTH if (strncmp(AUTH_METHOD_PASSWORD, tok, AUTH_METHOD_PASSWORD_LEN) == 0) { ses.authstate.authtypes |= AUTH_TYPE_PASSWORD; @@ -267,7 +271,7 @@ cli_ses.state = USERAUTH_SUCCESS_RCVD; cli_ses.lastauthtype = AUTH_TYPE_NONE; -#ifdef ENABLE_CLI_PUBKEY_AUTH +#if DROPBEAR_CLI_PUBKEY_AUTH cli_auth_pubkey_cleanup(); #endif } @@ -281,14 +285,14 @@ /* Order to try is pubkey, interactive, password. * As soon as "finished" is set for one, we don't do any more. */ -#ifdef ENABLE_CLI_PUBKEY_AUTH +#if DROPBEAR_CLI_PUBKEY_AUTH if (ses.authstate.authtypes & AUTH_TYPE_PUBKEY) { finished = cli_auth_pubkey(); cli_ses.lastauthtype = AUTH_TYPE_PUBKEY; } #endif -#ifdef ENABLE_CLI_PASSWORD_AUTH +#if DROPBEAR_CLI_PASSWORD_AUTH if (!finished && (ses.authstate.authtypes & AUTH_TYPE_PASSWORD)) { if (ses.keys->trans.algo_crypt->cipherdesc == NULL) { fprintf(stderr, "Sorry, I won't let you use password auth unencrypted.\n"); @@ -300,7 +304,7 @@ } #endif -#ifdef ENABLE_CLI_INTERACT_AUTH +#if DROPBEAR_CLI_INTERACT_AUTH if (!finished && (ses.authstate.authtypes & AUTH_TYPE_INTERACT)) { if (ses.keys->trans.algo_crypt->cipherdesc == NULL) { fprintf(stderr, "Sorry, I won't let you use interactive auth unencrypted.\n"); @@ -324,7 +328,7 @@ return DROPBEAR_FAILURE; } -#if defined(ENABLE_CLI_PASSWORD_AUTH) || defined(ENABLE_CLI_INTERACT_AUTH) +#if DROPBEAR_CLI_PASSWORD_AUTH || DROPBEAR_CLI_INTERACT_AUTH /* A helper for getpass() that exits if the user cancels. The returned * password is statically allocated by getpass() */ char* getpass_or_cancel(char* prompt)
--- a/cli-authinteract.c Fri Mar 18 22:47:33 2016 +0800 +++ b/cli-authinteract.c Fri Jul 22 00:08:02 2016 +0800 @@ -29,7 +29,7 @@ #include "ssh.h" #include "runopts.h" -#ifdef ENABLE_CLI_INTERACT_AUTH +#if DROPBEAR_CLI_INTERACT_AUTH static char* get_response(char* prompt) { @@ -172,4 +172,4 @@ TRACE(("leave cli_auth_interactive")) } -#endif /* ENABLE_CLI_INTERACT_AUTH */ +#endif /* DROPBEAR_CLI_INTERACT_AUTH */
--- a/cli-authpasswd.c Fri Mar 18 22:47:33 2016 +0800 +++ b/cli-authpasswd.c Fri Jul 22 00:08:02 2016 +0800 @@ -29,9 +29,9 @@ #include "ssh.h" #include "runopts.h" -#ifdef ENABLE_CLI_PASSWORD_AUTH +#if DROPBEAR_CLI_PASSWORD_AUTH -#ifdef ENABLE_CLI_ASKPASS_HELPER +#if DROPBEAR_CLI_ASKPASS_HELPER /* Returns 1 if we want to use the askpass program, 0 otherwise */ static int want_askpass() { @@ -113,7 +113,7 @@ TRACE(("leave gui_getpass")) return(buf); } -#endif /* ENABLE_CLI_ASKPASS_HELPER */ +#endif /* DROPBEAR_CLI_ASKPASS_HELPER */ void cli_auth_password() { @@ -125,7 +125,7 @@ snprintf(prompt, sizeof(prompt), "%s@%s's password: ", cli_opts.username, cli_opts.remotehost); -#ifdef ENABLE_CLI_ASKPASS_HELPER +#if DROPBEAR_CLI_ASKPASS_HELPER if (want_askpass()) { password = gui_getpass(prompt); @@ -158,4 +158,4 @@ TRACE(("leave cli_auth_password")) } -#endif /* ENABLE_CLI_PASSWORD_AUTH */ +#endif /* DROPBEAR_CLI_PASSWORD_AUTH */
--- a/cli-authpubkey.c Fri Mar 18 22:47:33 2016 +0800 +++ b/cli-authpubkey.c Fri Jul 22 00:08:02 2016 +0800 @@ -32,7 +32,7 @@ #include "auth.h" #include "agentfwd.h" -#ifdef ENABLE_CLI_PUBKEY_AUTH +#if DROPBEAR_CLI_PUBKEY_AUTH static void send_msg_userauth_pubkey(sign_key *key, int type, int realsign); /* Called when we receive a SSH_MSG_USERAUTH_FAILURE for a pubkey request. @@ -122,7 +122,7 @@ void cli_buf_put_sign(buffer* buf, sign_key *key, int type, buffer *data_buf) { -#ifdef ENABLE_CLI_AGENTFWD +#if DROPBEAR_CLI_AGENTFWD if (key->source == SIGNKEY_SOURCE_AGENT) { /* Format the agent signature ourselves, as buf_put_sign would. */ buffer *sigblob; @@ -131,7 +131,7 @@ buf_putbufstring(buf, sigblob); buf_free(sigblob); } else -#endif /* ENABLE_CLI_AGENTFWD */ +#endif /* DROPBEAR_CLI_AGENTFWD */ { buf_put_sign(buf, key, type, data_buf); } @@ -185,7 +185,7 @@ TRACE(("enter cli_auth_pubkey")) -#ifdef ENABLE_CLI_AGENTFWD +#if DROPBEAR_CLI_AGENTFWD if (!cli_opts.agent_keys_loaded) { /* get the list of available keys from the agent */ cli_load_agent_keys(cli_opts.privkeys); @@ -209,7 +209,7 @@ void cli_auth_pubkey_cleanup() { -#ifdef ENABLE_CLI_AGENTFWD +#if DROPBEAR_CLI_AGENTFWD m_close(cli_opts.agent_fd); cli_opts.agent_fd = -1; #endif
--- a/cli-chansession.c Fri Mar 18 22:47:33 2016 +0800 +++ b/cli-chansession.c Fri Jul 22 00:08:02 2016 +0800 @@ -355,7 +355,7 @@ cli_init_stdpipe_sess(channel); -#ifdef ENABLE_CLI_AGENTFWD +#if DROPBEAR_CLI_AGENTFWD if (cli_opts.agent_fwd) { cli_setup_agent(channel); } @@ -379,7 +379,7 @@ return 0; /* Success */ } -#ifdef ENABLE_CLI_NETCAT +#if DROPBEAR_CLI_NETCAT static const struct ChanType cli_chan_netcat = { 0, /* sepfds */
--- a/cli-kex.c Fri Mar 18 22:47:33 2016 +0800 +++ b/cli-kex.c Fri Jul 22 00:08:02 2016 +0800 @@ -48,6 +48,7 @@ CHECKCLEARTOWRITE(); buf_putbyte(ses.writepayload, SSH_MSG_KEXDH_INIT); switch (ses.newkeys->algo_kex->mode) { +#if DROPBEAR_NORMAL_DH case DROPBEAR_KEX_NORMAL_DH: if (ses.newkeys->algo_kex != cli_ses.param_kex_algo || !cli_ses.dh_param) { @@ -58,8 +59,9 @@ } buf_putmpint(ses.writepayload, &cli_ses.dh_param->pub); break; +#endif +#if DROPBEAR_ECDH case DROPBEAR_KEX_ECDH: -#ifdef DROPBEAR_ECDH if (ses.newkeys->algo_kex != cli_ses.param_kex_algo || !cli_ses.ecdh_param) { if (cli_ses.ecdh_param) { @@ -68,9 +70,9 @@ cli_ses.ecdh_param = gen_kexecdh_param(); } buf_put_ecc_raw_pubkey_string(ses.writepayload, &cli_ses.ecdh_param->key); + break; #endif - break; -#ifdef DROPBEAR_CURVE25519 +#if DROPBEAR_CURVE25519 case DROPBEAR_KEX_CURVE25519: if (ses.newkeys->algo_kex != cli_ses.param_kex_algo || !cli_ses.curve25519_param) { @@ -80,8 +82,8 @@ cli_ses.curve25519_param = gen_kexcurve25519_param(); } buf_putstring(ses.writepayload, (const char*)cli_ses.curve25519_param->pub, CURVE25519_LEN); + break; #endif - break; } cli_ses.param_kex_algo = ses.newkeys->algo_kex; @@ -118,6 +120,7 @@ } switch (ses.newkeys->algo_kex->mode) { +#if DROPBEAR_NORMAL_DH case DROPBEAR_KEX_NORMAL_DH: { DEF_MP_INT(dh_f); @@ -131,37 +134,38 @@ mp_clear(&dh_f); } break; +#endif +#if DROPBEAR_ECDH case DROPBEAR_KEX_ECDH: -#ifdef DROPBEAR_ECDH { buffer *ecdh_qs = buf_getstringbuf(ses.payload); kexecdh_comb_key(cli_ses.ecdh_param, ecdh_qs, hostkey); buf_free(ecdh_qs); } + break; #endif - break; -#ifdef DROPBEAR_CURVE25519 +#if DROPBEAR_CURVE25519 case DROPBEAR_KEX_CURVE25519: { buffer *ecdh_qs = buf_getstringbuf(ses.payload); kexcurve25519_comb_key(cli_ses.curve25519_param, ecdh_qs, hostkey); buf_free(ecdh_qs); } + break; #endif - break; } if (cli_ses.dh_param) { free_kexdh_param(cli_ses.dh_param); cli_ses.dh_param = NULL; } -#ifdef DROPBEAR_ECDH +#if DROPBEAR_ECDH if (cli_ses.ecdh_param) { free_kexecdh_param(cli_ses.ecdh_param); cli_ses.ecdh_param = NULL; } #endif -#ifdef DROPBEAR_CURVE25519 +#if DROPBEAR_CURVE25519 if (cli_ses.curve25519_param) { free_kexcurve25519_param(cli_ses.curve25519_param); cli_ses.curve25519_param = NULL;
--- a/cli-main.c Fri Mar 18 22:47:33 2016 +0800 +++ b/cli-main.c Fri Jul 22 00:08:02 2016 +0800 @@ -35,13 +35,13 @@ static void cli_dropbear_exit(int exitcode, const char* format, va_list param) ATTRIB_NORETURN; static void cli_dropbear_log(int priority, const char* format, va_list param); -#ifdef ENABLE_CLI_PROXYCMD +#if DROPBEAR_CLI_PROXYCMD static void cli_proxy_cmd(int *sock_in, int *sock_out, pid_t *pid_out); static void kill_proxy_sighandler(int signo); #endif -#if defined(DBMULTI_dbclient) || !defined(DROPBEAR_MULTI) -#if defined(DBMULTI_dbclient) && defined(DROPBEAR_MULTI) +#if defined(DBMULTI_dbclient) || !DROPBEAR_MULTI +#if defined(DBMULTI_dbclient) && DROPBEAR_MULTI int cli_main(int argc, char ** argv) { #else int main(int argc, char ** argv) { @@ -74,7 +74,7 @@ } pid_t proxy_cmd_pid = 0; -#ifdef ENABLE_CLI_PROXYCMD +#if DROPBEAR_CLI_PROXYCMD if (cli_opts.proxycmd) { cli_proxy_cmd(&sock_in, &sock_out, &proxy_cmd_pid); m_free(cli_opts.proxycmd); @@ -98,29 +98,30 @@ #endif /* DBMULTI stuff */ static void cli_dropbear_exit(int exitcode, const char* format, va_list param) { + char exitmsg[150]; + char fullmsg[300]; - char fmtbuf[300]; - char exitmsg[500]; + /* Note that exit message must be rendered before session cleanup */ + /* Render the formatted exit message */ + vsnprintf(exitmsg, sizeof(exitmsg), format, param); + + /* Add the prefix depending on session/auth state */ if (!sessinitdone) { - snprintf(fmtbuf, sizeof(fmtbuf), "Exited: %s", - format); + snprintf(fullmsg, sizeof(fullmsg), "Exited: %s", exitmsg); } else { - snprintf(fmtbuf, sizeof(fmtbuf), + snprintf(fullmsg, sizeof(fullmsg), "Connection to %s@%s:%s exited: %s", cli_opts.username, cli_opts.remotehost, - cli_opts.remoteport, format); + cli_opts.remoteport, exitmsg); } - /* Arguments to the exit printout may be unsafe to use after session_cleanup() */ - vsnprintf(exitmsg, sizeof(exitmsg), fmtbuf, param); - /* Do the cleanup first, since then the terminal will be reset */ session_cleanup(); /* Avoid printing onwards from terminal cruft */ fprintf(stderr, "\n"); - dropbear_log(LOG_INFO, "%s", exitmsg);; + dropbear_log(LOG_INFO, "%s", fullmsg); exit(exitcode); } @@ -150,7 +151,7 @@ dropbear_exit("Failed to run '%s'\n", cmd); } -#ifdef ENABLE_CLI_PROXYCMD +#if DROPBEAR_CLI_PROXYCMD static void cli_proxy_cmd(int *sock_in, int *sock_out, pid_t *pid_out) { char * ex_cmd = NULL; size_t ex_cmdlen; @@ -175,4 +176,4 @@ kill_proxy_command(); _exit(1); } -#endif /* ENABLE_CLI_PROXYCMD */ +#endif /* DROPBEAR_CLI_PROXYCMD */
--- a/cli-runopts.c Fri Mar 18 22:47:33 2016 +0800 +++ b/cli-runopts.c Fri Jul 22 00:08:02 2016 +0800 @@ -37,13 +37,13 @@ static void parse_hostname(const char* orighostarg); static void parse_multihop_hostname(const char* orighostarg, const char* argv0); static void fill_own_user(void); -#ifdef ENABLE_CLI_PUBKEY_AUTH +#if DROPBEAR_CLI_PUBKEY_AUTH static void loadidentityfile(const char* filename, int warnfail); #endif -#ifdef ENABLE_CLI_ANYTCPFWD +#if DROPBEAR_CLI_ANYTCPFWD static void addforward(const char* str, m_list *fwdlist); #endif -#ifdef ENABLE_CLI_NETCAT +#if DROPBEAR_CLI_NETCAT static void add_netcat(const char *str); #endif static void add_extendedopt(const char *str); @@ -51,7 +51,7 @@ static void printhelp() { fprintf(stderr, "Dropbear SSH client v%s https://matt.ucc.asn.au/dropbear/dropbear.html\n" -#ifdef ENABLE_CLI_MULTIHOP +#if DROPBEAR_CLI_MULTIHOP "Usage: %s [options] [user@]host[/port][,[user@]host/port],...] [command]\n" #else "Usage: %s [options] [user@]host[/port] [command]\n" @@ -66,38 +66,38 @@ "-y -y Don't perform any remote host key checking (caution)\n" "-s Request a subsystem (use by external sftp)\n" "-o option Set option in OpenSSH-like format ('-o help' to list options)\n" -#ifdef ENABLE_CLI_PUBKEY_AUTH +#if DROPBEAR_CLI_PUBKEY_AUTH "-i <identityfile> (multiple allowed, default %s)\n" #endif -#ifdef ENABLE_CLI_AGENTFWD +#if DROPBEAR_CLI_AGENTFWD "-A Enable agent auth forwarding\n" #endif -#ifdef ENABLE_CLI_LOCALTCPFWD +#if DROPBEAR_CLI_LOCALTCPFWD "-L <[listenaddress:]listenport:remotehost:remoteport> Local port forwarding\n" "-g Allow remote hosts to connect to forwarded ports\n" #endif -#ifdef ENABLE_CLI_REMOTETCPFWD +#if DROPBEAR_CLI_REMOTETCPFWD "-R <[listenaddress:]listenport:remotehost:remoteport> Remote port forwarding\n" #endif "-W <receive_window_buffer> (default %d, larger may be faster, max 1MB)\n" "-K <keepalive> (0 is never, default %d)\n" "-I <idle_timeout> (0 is never, default %d)\n" -#ifdef ENABLE_CLI_NETCAT +#if DROPBEAR_CLI_NETCAT "-B <endhost:endport> Netcat-alike forwarding\n" #endif -#ifdef ENABLE_CLI_PROXYCMD +#if DROPBEAR_CLI_PROXYCMD "-J <proxy_program> Use program pipe rather than TCP connection\n" #endif -#ifdef ENABLE_USER_ALGO_LIST +#if DROPBEAR_USER_ALGO_LIST "-c <cipher list> Specify preferred ciphers ('-c help' to list options)\n" "-m <MAC list> Specify preferred MACs for packet verification (or '-m help')\n" #endif "-V Version\n" -#ifdef DEBUG_TRACE +#if DEBUG_TRACE "-v verbose (compiled with DEBUG_TRACE)\n" #endif ,DROPBEAR_VERSION, cli_opts.progname, -#ifdef ENABLE_CLI_PUBKEY_AUTH +#if DROPBEAR_CLI_PUBKEY_AUTH DROPBEAR_DEFAULT_CLI_AUTHKEY, #endif DEFAULT_RECV_WINDOW, DEFAULT_KEEPALIVE, DEFAULT_IDLE_TIMEOUT); @@ -109,16 +109,16 @@ char ** next = 0; enum { OPT_EXTENDED_OPTIONS, -#ifdef ENABLE_CLI_PUBKEY_AUTH +#if DROPBEAR_CLI_PUBKEY_AUTH OPT_AUTHKEY, #endif -#ifdef ENABLE_CLI_LOCALTCPFWD +#if DROPBEAR_CLI_LOCALTCPFWD OPT_LOCALTCPFWD, #endif -#ifdef ENABLE_CLI_REMOTETCPFWD +#if DROPBEAR_CLI_REMOTETCPFWD OPT_REMOTETCPFWD, #endif -#ifdef ENABLE_CLI_NETCAT +#if DROPBEAR_CLI_NETCAT OPT_NETCAT, #endif /* a flag (no arg) if 'next' is NULL, a string-valued option otherwise */ @@ -145,31 +145,31 @@ cli_opts.always_accept_key = 0; cli_opts.no_hostkey_check = 0; cli_opts.is_subsystem = 0; -#ifdef ENABLE_CLI_PUBKEY_AUTH +#if DROPBEAR_CLI_PUBKEY_AUTH cli_opts.privkeys = list_new(); #endif -#ifdef ENABLE_CLI_ANYTCPFWD +#if DROPBEAR_CLI_ANYTCPFWD cli_opts.exit_on_fwd_failure = 0; #endif -#ifdef ENABLE_CLI_LOCALTCPFWD +#if DROPBEAR_CLI_LOCALTCPFWD cli_opts.localfwds = list_new(); opts.listen_fwd_all = 0; #endif -#ifdef ENABLE_CLI_REMOTETCPFWD +#if DROPBEAR_CLI_REMOTETCPFWD cli_opts.remotefwds = list_new(); #endif -#ifdef ENABLE_CLI_AGENTFWD +#if DROPBEAR_CLI_AGENTFWD cli_opts.agent_fwd = 0; cli_opts.agent_fd = -1; cli_opts.agent_keys_loaded = 0; #endif -#ifdef ENABLE_CLI_PROXYCMD +#if DROPBEAR_CLI_PROXYCMD cli_opts.proxycmd = NULL; #endif #ifndef DISABLE_ZLIB opts.compress_mode = DROPBEAR_COMPRESS_ON; #endif -#ifdef ENABLE_USER_ALGO_LIST +#if DROPBEAR_USER_ALGO_LIST opts.cipher_list = NULL; opts.mac_list = NULL; #endif @@ -213,7 +213,7 @@ case 'p': /* remoteport */ next = &cli_opts.remoteport; break; -#ifdef ENABLE_CLI_PUBKEY_AUTH +#if DROPBEAR_CLI_PUBKEY_AUTH case 'i': /* an identityfile */ opt = OPT_AUTHKEY; break; @@ -236,7 +236,7 @@ case 'o': opt = OPT_EXTENDED_OPTIONS; break; -#ifdef ENABLE_CLI_LOCALTCPFWD +#if DROPBEAR_CLI_LOCALTCPFWD case 'L': opt = OPT_LOCALTCPFWD; break; @@ -244,17 +244,17 @@ opts.listen_fwd_all = 1; break; #endif -#ifdef ENABLE_CLI_REMOTETCPFWD +#if DROPBEAR_CLI_REMOTETCPFWD case 'R': opt = OPT_REMOTETCPFWD; break; #endif -#ifdef ENABLE_CLI_NETCAT +#if DROPBEAR_CLI_NETCAT case 'B': opt = OPT_NETCAT; break; #endif -#ifdef ENABLE_CLI_PROXYCMD +#if DROPBEAR_CLI_PROXYCMD case 'J': next = &cli_opts.proxycmd; break; @@ -278,12 +278,12 @@ case 'I': next = &idle_timeout_arg; break; -#ifdef ENABLE_CLI_AGENTFWD +#if DROPBEAR_CLI_AGENTFWD case 'A': cli_opts.agent_fwd = 1; break; #endif -#ifdef ENABLE_USER_ALGO_LIST +#if DROPBEAR_USER_ALGO_LIST case 'c': next = &opts.cipher_list; break; @@ -291,22 +291,22 @@ next = &opts.mac_list; break; #endif -#ifdef DEBUG_TRACE +#if DEBUG_TRACE case 'v': debug_trace = 1; break; #endif case 'F': case 'e': -#ifndef ENABLE_USER_ALGO_LIST +#if !DROPBEAR_USER_ALGO_LIST case 'c': case 'm': #endif case 'D': -#ifndef ENABLE_CLI_REMOTETCPFWD +#ifndef DROPBEAR_CLI_REMOTETCPFWD case 'R': #endif -#ifndef ENABLE_CLI_LOCALTCPFWD +#ifndef DROPBEAR_CLI_LOCALTCPFWD case 'L': #endif case 'V': @@ -338,28 +338,28 @@ add_extendedopt(&argv[i][j]); } else -#ifdef ENABLE_CLI_PUBKEY_AUTH +#if DROPBEAR_CLI_PUBKEY_AUTH if (opt == OPT_AUTHKEY) { TRACE(("opt authkey")) loadidentityfile(&argv[i][j], 1); } else #endif -#ifdef ENABLE_CLI_REMOTETCPFWD +#if DROPBEAR_CLI_REMOTETCPFWD if (opt == OPT_REMOTETCPFWD) { TRACE(("opt remotetcpfwd")) addforward(&argv[i][j], cli_opts.remotefwds); } else #endif -#ifdef ENABLE_CLI_LOCALTCPFWD +#if DROPBEAR_CLI_LOCALTCPFWD if (opt == OPT_LOCALTCPFWD) { TRACE(("opt localtcpfwd")) addforward(&argv[i][j], cli_opts.localfwds); } else #endif -#ifdef ENABLE_CLI_NETCAT +#if DROPBEAR_CLI_NETCAT if (opt == OPT_NETCAT) { TRACE(("opt netcat")) add_netcat(&argv[i][j]); @@ -405,11 +405,11 @@ /* And now a few sanity checks and setup */ -#ifdef ENABLE_USER_ALGO_LIST +#if DROPBEAR_USER_ALGO_LIST parse_ciphers_macs(); #endif -#ifdef ENABLE_CLI_PROXYCMD +#if DROPBEAR_CLI_PROXYCMD if (cli_opts.proxycmd) { /* To match the common path of m_freeing it */ cli_opts.proxycmd = m_strdup(cli_opts.proxycmd); @@ -457,13 +457,13 @@ opts.idle_timeout_secs = val; } -#ifdef ENABLE_CLI_NETCAT +#if DROPBEAR_CLI_NETCAT if (cli_opts.cmd && cli_opts.netcat_host) { dropbear_log(LOG_INFO, "Ignoring command '%s' in netcat mode", cli_opts.cmd); } #endif -#if defined(DROPBEAR_DEFAULT_CLI_AUTHKEY) && defined(ENABLE_CLI_PUBKEY_AUTH) +#if (DROPBEAR_CLI_PUBKEY_AUTH) { char *expand_path = expand_homedir_path(DROPBEAR_DEFAULT_CLI_AUTHKEY); loadidentityfile(expand_path, 0); @@ -474,14 +474,14 @@ /* The hostname gets set up last, since * in multi-hop mode it will require knowledge * of other flags such as -i */ -#ifdef ENABLE_CLI_MULTIHOP +#if DROPBEAR_CLI_MULTIHOP parse_multihop_hostname(host_arg, argv[0]); #else parse_hostname(host_arg); #endif } -#ifdef ENABLE_CLI_PUBKEY_AUTH +#if DROPBEAR_CLI_PUBKEY_AUTH static void loadidentityfile(const char* filename, int warnfail) { sign_key *key; enum signkey_type keytype; @@ -504,7 +504,7 @@ } #endif -#ifdef ENABLE_CLI_MULTIHOP +#if DROPBEAR_CLI_MULTIHOP static char* multihop_passthrough_args() { @@ -514,13 +514,13 @@ m_list_elem *iter; /* Fill out -i, -y, -W options that make sense for all * the intermediate processes */ -#ifdef ENABLE_CLI_PUBKEY_AUTH +#if DROPBEAR_CLI_PUBKEY_AUTH for (iter = cli_opts.privkeys->first; iter; iter = iter->next) { sign_key * key = (sign_key*)iter->item; len += 3 + strlen(key->filename); } -#endif /* ENABLE_CLI_PUBKEY_AUTH */ +#endif /* DROPBEAR_CLI_PUBKEY_AUTH */ len += 30; /* space for -W <size>, terminator. */ ret = m_malloc(len); @@ -543,7 +543,7 @@ total += written; } -#ifdef ENABLE_CLI_PUBKEY_AUTH +#if DROPBEAR_CLI_PUBKEY_AUTH for (iter = cli_opts.privkeys->first; iter; iter = iter->next) { sign_key * key = (sign_key*)iter->item; @@ -552,7 +552,7 @@ dropbear_assert((unsigned int)written < size); total += written; } -#endif /* ENABLE_CLI_PUBKEY_AUTH */ +#endif /* DROPBEAR_CLI_PUBKEY_AUTH */ /* if args were passed, total will be not zero, and it will have a space at the end, so remove that */ if (total > 0) @@ -636,7 +636,7 @@ } m_free(hostbuf); } -#endif /* !ENABLE_CLI_MULTIHOP */ +#endif /* !DROPBEAR_CLI_MULTIHOP */ /* Parses a [user@]hostname[/port] argument. */ static void parse_hostname(const char* orighostarg) { @@ -675,7 +675,7 @@ } } -#ifdef ENABLE_CLI_NETCAT +#if DROPBEAR_CLI_NETCAT static void add_netcat(const char* origstr) { char *portstr = NULL; @@ -728,7 +728,7 @@ } -#ifdef ENABLE_CLI_ANYTCPFWD +#if DROPBEAR_CLI_ANYTCPFWD /* Turn a "[listenaddr:]listenport:remoteaddr:remoteport" string into into a forwarding * set, and add it to the forwarding list */ static void addforward(const char* origstr, m_list *fwdlist) { @@ -870,7 +870,7 @@ if (strcmp(origstr, "help") == 0) { dropbear_log(LOG_INFO, "Available options:\n" -#ifdef ENABLE_CLI_ANYTCPFWD +#if DROPBEAR_CLI_ANYTCPFWD "\tExitOnForwardFailure\n" #endif #ifndef DISABLE_SYSLOG @@ -880,7 +880,7 @@ exit(EXIT_SUCCESS); } -#ifdef ENABLE_CLI_ANYTCPFWD +#if DROPBEAR_CLI_ANYTCPFWD if (match_extendedopt(&optstr, "ExitOnForwardFailure") == DROPBEAR_SUCCESS) { cli_opts.exit_on_fwd_failure = parse_flag_value(optstr); return;
--- a/cli-session.c Fri Mar 18 22:47:33 2016 +0800 +++ b/cli-session.c Fri Jul 22 00:08:02 2016 +0800 @@ -73,7 +73,7 @@ {SSH_MSG_GLOBAL_REQUEST, recv_msg_global_request_cli}, {SSH_MSG_CHANNEL_SUCCESS, ignore_recv_response}, {SSH_MSG_CHANNEL_FAILURE, ignore_recv_response}, -#ifdef ENABLE_CLI_REMOTETCPFWD +#if DROPBEAR_CLI_REMOTETCPFWD {SSH_MSG_REQUEST_SUCCESS, cli_recv_msg_request_success}, /* client */ {SSH_MSG_REQUEST_FAILURE, cli_recv_msg_request_failure}, /* client */ #else @@ -85,10 +85,10 @@ }; static const struct ChanType *cli_chantypes[] = { -#ifdef ENABLE_CLI_REMOTETCPFWD +#if DROPBEAR_CLI_REMOTETCPFWD &cli_chan_tcpremote, #endif -#ifdef ENABLE_CLI_AGENTFWD +#if DROPBEAR_CLI_AGENTFWD &cli_chan_agent, #endif NULL /* Null termination */ @@ -133,7 +133,7 @@ } -#ifdef USE_KEX_FIRST_FOLLOWS +#if DROPBEAR_KEX_FIRST_FOLLOWS static void cli_send_kex_first_guess() { send_msg_kexdh_init(); } @@ -165,7 +165,7 @@ cli_ses.lastprivkey = NULL; cli_ses.lastauthtype = 0; -#ifdef DROPBEAR_NONE_CIPHER +#if DROPBEAR_NONE_CIPHER cli_ses.cipher_none_after_auth = get_algo_usable(sshciphers, "none"); set_algo_usable(sshciphers, "none", 0); #else @@ -182,7 +182,7 @@ ses.isserver = 0; -#ifdef USE_KEX_FIRST_FOLLOWS +#if DROPBEAR_KEX_FIRST_FOLLOWS ses.send_kex_first_guess = cli_send_kex_first_guess; #endif @@ -275,7 +275,7 @@ } #endif -#ifdef DROPBEAR_NONE_CIPHER +#if DROPBEAR_NONE_CIPHER if (cli_ses.cipher_none_after_auth) { set_algo_usable(sshciphers, "none", 1); @@ -299,7 +299,7 @@ } } -#ifdef ENABLE_CLI_NETCAT +#if DROPBEAR_CLI_NETCAT if (cli_opts.netcat_host) { cli_send_netcat_request(); } else @@ -308,10 +308,10 @@ cli_send_chansess_request(); } -#ifdef ENABLE_CLI_LOCALTCPFWD +#if DROPBEAR_CLI_LOCALTCPFWD setup_localtcp(); #endif -#ifdef ENABLE_CLI_REMOTETCPFWD +#if DROPBEAR_CLI_REMOTETCPFWD setup_remotetcp(); #endif
--- a/cli-tcpfwd.c Fri Mar 18 22:47:33 2016 +0800 +++ b/cli-tcpfwd.c Fri Jul 22 00:08:02 2016 +0800 @@ -32,7 +32,7 @@ #include "ssh.h" #include "netio.h" -#ifdef ENABLE_CLI_REMOTETCPFWD +#if DROPBEAR_CLI_REMOTETCPFWD static int newtcpforwarded(struct Channel * channel); const struct ChanType cli_chan_tcpremote = { @@ -45,7 +45,7 @@ }; #endif -#ifdef ENABLE_CLI_LOCALTCPFWD +#if DROPBEAR_CLI_LOCALTCPFWD static int cli_localtcp(const char* listenaddr, unsigned int listenport, const char* remoteaddr, @@ -60,7 +60,7 @@ }; #endif -#ifdef ENABLE_CLI_ANYTCPFWD +#if DROPBEAR_CLI_ANYTCPFWD static void fwd_failed(const char* format, ...) ATTRIB_PRINTF(1,2); static void fwd_failed(const char* format, ...) { @@ -77,7 +77,7 @@ } #endif -#ifdef ENABLE_CLI_LOCALTCPFWD +#if DROPBEAR_CLI_LOCALTCPFWD void setup_localtcp() { m_list_elem *iter; int ret; @@ -144,9 +144,9 @@ TRACE(("leave cli_localtcp: %d", ret)) return ret; } -#endif /* ENABLE_CLI_LOCALTCPFWD */ +#endif /* DROPBEAR_CLI_LOCALTCPFWD */ -#ifdef ENABLE_CLI_REMOTETCPFWD +#if DROPBEAR_CLI_REMOTETCPFWD static void send_msg_global_request_remotetcp(const char *addr, int port) { TRACE(("enter send_msg_global_request_remotetcp")) @@ -285,4 +285,4 @@ TRACE(("leave newtcpdirect: err %d", err)) return err; } -#endif /* ENABLE_CLI_REMOTETCPFWD */ +#endif /* DROPBEAR_CLI_REMOTETCPFWD */
--- a/common-algo.c Fri Mar 18 22:47:33 2016 +0800 +++ b/common-algo.c Fri Jul 22 00:08:02 2016 +0800 @@ -53,27 +53,27 @@ /* Remember to add new ciphers/hashes to regciphers/reghashes too */ -#ifdef DROPBEAR_AES256 +#if DROPBEAR_AES256 static const struct dropbear_cipher dropbear_aes256 = {&aes_desc, 32, 16}; #endif -#ifdef DROPBEAR_AES128 +#if DROPBEAR_AES128 static const struct dropbear_cipher dropbear_aes128 = {&aes_desc, 16, 16}; #endif -#ifdef DROPBEAR_BLOWFISH +#if DROPBEAR_BLOWFISH static const struct dropbear_cipher dropbear_blowfish = {&blowfish_desc, 16, 8}; #endif -#ifdef DROPBEAR_TWOFISH256 +#if DROPBEAR_TWOFISH256 static const struct dropbear_cipher dropbear_twofish256 = {&twofish_desc, 32, 16}; #endif -#ifdef DROPBEAR_TWOFISH128 +#if DROPBEAR_TWOFISH128 static const struct dropbear_cipher dropbear_twofish128 = {&twofish_desc, 16, 16}; #endif -#ifdef DROPBEAR_3DES +#if DROPBEAR_3DES static const struct dropbear_cipher dropbear_3des = {&des3_desc, 24, 8}; #endif @@ -84,7 +84,7 @@ /* A few void* s are required to silence warnings * about the symmetric_CBC vs symmetric_CTR cipher_state pointer */ -#ifdef DROPBEAR_ENABLE_CBC_MODE +#if DROPBEAR_ENABLE_CBC_MODE const struct dropbear_cipher_mode dropbear_mode_cbc = {(void*)cbc_start, (void*)cbc_encrypt, (void*)cbc_decrypt}; #endif /* DROPBEAR_ENABLE_CBC_MODE */ @@ -92,7 +92,7 @@ const struct dropbear_cipher_mode dropbear_mode_none = {void_start, void_cipher, void_cipher}; -#ifdef DROPBEAR_ENABLE_CTR_MODE +#if DROPBEAR_ENABLE_CTR_MODE /* a wrapper to make ctr_start and cbc_start look the same */ static int dropbear_big_endian_ctr_start(int cipher, const unsigned char *IV, @@ -107,23 +107,23 @@ /* Mapping of ssh hashes to libtomcrypt hashes, including keysize etc. {&hash_desc, keysize, hashsize} */ -#ifdef DROPBEAR_SHA1_HMAC +#if DROPBEAR_SHA1_HMAC static const struct dropbear_hash dropbear_sha1 = {&sha1_desc, 20, 20}; #endif -#ifdef DROPBEAR_SHA1_96_HMAC +#if DROPBEAR_SHA1_96_HMAC static const struct dropbear_hash dropbear_sha1_96 = {&sha1_desc, 20, 12}; #endif -#ifdef DROPBEAR_SHA2_256_HMAC +#if DROPBEAR_SHA2_256_HMAC static const struct dropbear_hash dropbear_sha2_256 = {&sha256_desc, 32, 32}; #endif -#ifdef DROPBEAR_SHA2_512_HMAC +#if DROPBEAR_SHA2_512_HMAC static const struct dropbear_hash dropbear_sha2_512 = {&sha512_desc, 64, 64}; #endif -#ifdef DROPBEAR_MD5_HMAC +#if DROPBEAR_MD5_HMAC static const struct dropbear_hash dropbear_md5 = {&md5_desc, 16, 16}; #endif @@ -137,73 +137,70 @@ * that is also supported by the server will get used. */ algo_type sshciphers[] = { -#ifdef DROPBEAR_ENABLE_CTR_MODE -#ifdef DROPBEAR_AES128 +#if DROPBEAR_ENABLE_CTR_MODE +#if DROPBEAR_AES128 {"aes128-ctr", 0, &dropbear_aes128, 1, &dropbear_mode_ctr}, #endif -#ifdef DROPBEAR_AES256 +#if DROPBEAR_AES256 {"aes256-ctr", 0, &dropbear_aes256, 1, &dropbear_mode_ctr}, #endif -#ifdef DROPBEAR_TWOFISH_CTR +#if DROPBEAR_TWOFISH_CTR /* twofish ctr is conditional as it hasn't been tested for interoperability, see options.h */ -#ifdef DROPBEAR_TWOFISH256 +#if DROPBEAR_TWOFISH256 {"twofish256-ctr", 0, &dropbear_twofish256, 1, &dropbear_mode_ctr}, #endif -#ifdef DROPBEAR_TWOFISH128 +#if DROPBEAR_TWOFISH128 {"twofish128-ctr", 0, &dropbear_twofish128, 1, &dropbear_mode_ctr}, #endif #endif /* DROPBEAR_TWOFISH_CTR */ #endif /* DROPBEAR_ENABLE_CTR_MODE */ -#ifdef DROPBEAR_ENABLE_CBC_MODE -#ifdef DROPBEAR_AES128 +#if DROPBEAR_ENABLE_CBC_MODE +#if DROPBEAR_AES128 {"aes128-cbc", 0, &dropbear_aes128, 1, &dropbear_mode_cbc}, #endif -#ifdef DROPBEAR_AES256 +#if DROPBEAR_AES256 {"aes256-cbc", 0, &dropbear_aes256, 1, &dropbear_mode_cbc}, #endif -#ifdef DROPBEAR_TWOFISH256 +#if DROPBEAR_TWOFISH256 {"twofish256-cbc", 0, &dropbear_twofish256, 1, &dropbear_mode_cbc}, {"twofish-cbc", 0, &dropbear_twofish256, 1, &dropbear_mode_cbc}, #endif -#ifdef DROPBEAR_TWOFISH128 +#if DROPBEAR_TWOFISH128 {"twofish128-cbc", 0, &dropbear_twofish128, 1, &dropbear_mode_cbc}, #endif -#ifdef DROPBEAR_3DES +#if DROPBEAR_3DES {"3des-ctr", 0, &dropbear_3des, 1, &dropbear_mode_ctr}, #endif -#ifdef DROPBEAR_3DES +#if DROPBEAR_3DES {"3des-cbc", 0, &dropbear_3des, 1, &dropbear_mode_cbc}, #endif -#ifdef DROPBEAR_BLOWFISH +#if DROPBEAR_BLOWFISH {"blowfish-cbc", 0, &dropbear_blowfish, 1, &dropbear_mode_cbc}, #endif #endif /* DROPBEAR_ENABLE_CBC_MODE */ -#ifdef DROPBEAR_NONE_CIPHER +#if DROPBEAR_NONE_CIPHER {"none", 0, (void*)&dropbear_nocipher, 1, &dropbear_mode_none}, #endif {NULL, 0, NULL, 0, NULL} }; algo_type sshhashes[] = { -#ifdef DROPBEAR_SHA1_96_HMAC +#if DROPBEAR_SHA1_96_HMAC {"hmac-sha1-96", 0, &dropbear_sha1_96, 1, NULL}, #endif -#ifdef DROPBEAR_SHA1_HMAC +#if DROPBEAR_SHA1_HMAC {"hmac-sha1", 0, &dropbear_sha1, 1, NULL}, #endif -#ifdef DROPBEAR_SHA2_256_HMAC +#if DROPBEAR_SHA2_256_HMAC {"hmac-sha2-256", 0, &dropbear_sha2_256, 1, NULL}, #endif -#ifdef DROPBEAR_SHA2_512_HMAC +#if DROPBEAR_SHA2_512_HMAC {"hmac-sha2-512", 0, &dropbear_sha2_512, 1, NULL}, #endif -#ifdef DROPBEAR_MD5_HMAC +#if DROPBEAR_MD5_HMAC {"hmac-md5", 0, (void*)&dropbear_md5, 1, NULL}, #endif -#ifdef DROPBEAR_NONE_INTEGRITY - {"none", 0, (void*)&dropbear_nohash, 1, NULL}, -#endif {NULL, 0, NULL, 0, NULL} }; @@ -228,21 +225,21 @@ }; algo_type sshhostkey[] = { -#ifdef DROPBEAR_ECDSA -#ifdef DROPBEAR_ECC_256 +#if DROPBEAR_ECDSA +#if DROPBEAR_ECC_256 {"ecdsa-sha2-nistp256", DROPBEAR_SIGNKEY_ECDSA_NISTP256, NULL, 1, NULL}, #endif -#ifdef DROPBEAR_ECC_384 +#if DROPBEAR_ECC_384 {"ecdsa-sha2-nistp384", DROPBEAR_SIGNKEY_ECDSA_NISTP384, NULL, 1, NULL}, #endif -#ifdef DROPBEAR_ECC_521 +#if DROPBEAR_ECC_521 {"ecdsa-sha2-nistp521", DROPBEAR_SIGNKEY_ECDSA_NISTP521, NULL, 1, NULL}, #endif #endif -#ifdef DROPBEAR_RSA +#if DROPBEAR_RSA {"ssh-rsa", DROPBEAR_SIGNKEY_RSA, NULL, 1, NULL}, #endif -#ifdef DROPBEAR_DSS +#if DROPBEAR_DSS {"ssh-dss", DROPBEAR_SIGNKEY_DSS, NULL, 1, NULL}, #endif {NULL, 0, NULL, 0, NULL} @@ -251,63 +248,63 @@ #if DROPBEAR_DH_GROUP1 static const struct dropbear_kex kex_dh_group1 = {DROPBEAR_KEX_NORMAL_DH, dh_p_1, DH_P_1_LEN, NULL, &sha1_desc }; #endif -#if DROPBEAR_DH_GROUP14 +#if DROPBEAR_DH_GROUP14_SHA1 static const struct dropbear_kex kex_dh_group14_sha1 = {DROPBEAR_KEX_NORMAL_DH, dh_p_14, DH_P_14_LEN, NULL, &sha1_desc }; -#if DROPBEAR_DH_GROUP14_256 +#endif +#if DROPBEAR_DH_GROUP14_SHA256 static const struct dropbear_kex kex_dh_group14_sha256 = {DROPBEAR_KEX_NORMAL_DH, dh_p_14, DH_P_14_LEN, NULL, &sha256_desc }; #endif -#endif #if DROPBEAR_DH_GROUP16 static const struct dropbear_kex kex_dh_group16_sha512 = {DROPBEAR_KEX_NORMAL_DH, dh_p_16, DH_P_16_LEN, NULL, &sha512_desc }; #endif /* These can't be const since dropbear_ecc_fill_dp() fills out ecc_curve at runtime */ -#ifdef DROPBEAR_ECDH -#ifdef DROPBEAR_ECC_256 +#if DROPBEAR_ECDH +#if DROPBEAR_ECC_256 static const struct dropbear_kex kex_ecdh_nistp256 = {DROPBEAR_KEX_ECDH, NULL, 0, &ecc_curve_nistp256, &sha256_desc }; #endif -#ifdef DROPBEAR_ECC_384 +#if DROPBEAR_ECC_384 static const struct dropbear_kex kex_ecdh_nistp384 = {DROPBEAR_KEX_ECDH, NULL, 0, &ecc_curve_nistp384, &sha384_desc }; #endif -#ifdef DROPBEAR_ECC_521 +#if DROPBEAR_ECC_521 static const struct dropbear_kex kex_ecdh_nistp521 = {DROPBEAR_KEX_ECDH, NULL, 0, &ecc_curve_nistp521, &sha512_desc }; #endif #endif /* DROPBEAR_ECDH */ -#ifdef DROPBEAR_CURVE25519 +#if DROPBEAR_CURVE25519 /* Referred to directly */ static const struct dropbear_kex kex_curve25519 = {DROPBEAR_KEX_CURVE25519, NULL, 0, NULL, &sha256_desc }; #endif algo_type sshkex[] = { -#ifdef DROPBEAR_CURVE25519 +#if DROPBEAR_CURVE25519 {"[email protected]", 0, &kex_curve25519, 1, NULL}, #endif -#ifdef DROPBEAR_ECDH -#ifdef DROPBEAR_ECC_521 +#if DROPBEAR_ECDH +#if DROPBEAR_ECC_521 {"ecdh-sha2-nistp521", 0, &kex_ecdh_nistp521, 1, NULL}, #endif -#ifdef DROPBEAR_ECC_384 +#if DROPBEAR_ECC_384 {"ecdh-sha2-nistp384", 0, &kex_ecdh_nistp384, 1, NULL}, #endif -#ifdef DROPBEAR_ECC_256 +#if DROPBEAR_ECC_256 {"ecdh-sha2-nistp256", 0, &kex_ecdh_nistp256, 1, NULL}, #endif #endif -#if DROPBEAR_DH_GROUP14 -#if DROPBEAR_DH_GROUP14_256 +#if DROPBEAR_DH_GROUP14_SHA1 + {"diffie-hellman-group14-sha1", 0, &kex_dh_group14_sha1, 1, NULL}, +#endif +#if DROPBEAR_DH_GROUP14_SHA256 {"diffie-hellman-group14-sha256", 0, &kex_dh_group14_sha256, 1, NULL}, #endif - {"diffie-hellman-group14-sha1", 0, &kex_dh_group14_sha1, 1, NULL}, -#endif #if DROPBEAR_DH_GROUP1 {"diffie-hellman-group1-sha1", 0, &kex_dh_group1, 1, NULL}, #endif #if DROPBEAR_DH_GROUP16 {"diffie-hellman-group16-sha512", 0, &kex_dh_group16_sha512, 1, NULL}, #endif -#ifdef USE_KEXGUESS2 +#if DROPBEAR_KEXGUESS2 {KEXGUESS2_ALGO_NAME, KEXGUESS2_ALGO_ID, NULL, 1, NULL}, #endif {NULL, 0, NULL, 0, NULL} @@ -349,6 +346,7 @@ } } buf_putstring(buf, (const char*)algolist->data, algolist->len); + TRACE(("algolist add '%*s'", algolist->len, algolist->data)) buf_free(algolist); } @@ -468,7 +466,7 @@ return ret; } -#ifdef DROPBEAR_NONE_CIPHER +#if DROPBEAR_NONE_CIPHER void set_algo_usable(algo_type algos[], const char * algo_name, int usable) @@ -500,7 +498,7 @@ #endif /* DROPBEAR_NONE_CIPHER */ -#ifdef ENABLE_USER_ALGO_LIST +#if DROPBEAR_USER_ALGO_LIST char * algolist_string(algo_type algos[]) @@ -531,21 +529,6 @@ return NULL; } -static void -try_add_algo(const char *algo_name, algo_type *algos, - const char *algo_desc, algo_type * new_algos, int *num_ret) -{ - algo_type *match_algo = check_algo(algo_name, algos); - if (!match_algo) - { - dropbear_log(LOG_WARNING, "This Dropbear program does not support '%s' %s algorithm", algo_name, algo_desc); - return; - } - - new_algos[*num_ret] = *match_algo; - (*num_ret)++; -} - /* Checks a user provided comma-separated algorithm list for available * options. Any that are not acceptable are removed in-place. Returns the * number of valid algorithms. */ @@ -553,30 +536,43 @@ check_user_algos(const char* user_algo_list, algo_type * algos, const char *algo_desc) { - algo_type new_algos[MAX_PROPOSED_ALGO]; - /* this has two passes. first we sweep through the given list of - * algorithms and mark them as usable=2 in the algo_type[] array... */ - int num_ret = 0; + algo_type new_algos[MAX_PROPOSED_ALGO+1]; char *work_list = m_strdup(user_algo_list); - char *last_name = work_list; + char *start = work_list; char *c; - for (c = work_list; *c; c++) + int n; + /* So we can iterate and look for null terminator */ + memset(new_algos, 0x0, sizeof(new_algos)); + for (c = work_list, n = 0; ; c++) { - if (*c == ',') - { + char oc = *c; + if (n >= MAX_PROPOSED_ALGO) { + dropbear_exit("Too many algorithms '%s'", user_algo_list); + } + if (*c == ',' || *c == '\0') { + algo_type *match_algo = NULL; *c = '\0'; - try_add_algo(last_name, algos, algo_desc, new_algos, &num_ret); + match_algo = check_algo(start, algos); + if (match_algo) { + if (check_algo(start, new_algos)) { + TRACE(("Skip repeated algorithm '%s'", start)) + } else { + new_algos[n] = *match_algo; + n++; + } + } else { + dropbear_log(LOG_WARNING, "This Dropbear program does not support '%s' %s algorithm", start, algo_desc); + } c++; - last_name = c; + start = c; + } + if (oc == '\0') { + break; } } - try_add_algo(last_name, algos, algo_desc, new_algos, &num_ret); m_free(work_list); - - new_algos[num_ret].name = NULL; - - /* Copy one more as a blank delimiter */ - memcpy(algos, new_algos, sizeof(*new_algos) * (num_ret+1)); - return num_ret; + /* n+1 to include a null terminator */ + memcpy(algos, new_algos, sizeof(*new_algos) * (n+1)); + return n; } -#endif /* ENABLE_USER_ALGO_LIST */ +#endif /* DROPBEAR_USER_ALGO_LIST */
--- a/common-channel.c Fri Mar 18 22:47:33 2016 +0800 +++ b/common-channel.c Fri Jul 22 00:08:02 2016 +0800 @@ -78,7 +78,7 @@ ses.chantypes = chantypes; -#ifdef USING_LISTENERS +#if DROPBEAR_LISTENERS listeners_initialise(); #endif @@ -255,7 +255,7 @@ } } -#ifdef USING_LISTENERS +#if DROPBEAR_LISTENERS handle_listeners(readfds); #endif } @@ -595,7 +595,7 @@ } /* foreach channel */ -#ifdef USING_LISTENERS +#if DROPBEAR_LISTENERS set_listener_fds(readfds); #endif @@ -1114,7 +1114,7 @@ } -#if defined(USING_LISTENERS) || defined(DROPBEAR_CLIENT) +#if (DROPBEAR_LISTENERS) || (DROPBEAR_CLIENT) /* Create a new channel, and start the open request. This is intended * for X11, agent, tcp forwarding, and should be filled with channel-specific * options, with the calling function calling encrypt_packet() after @@ -1210,7 +1210,7 @@ remove_channel(channel); } -#endif /* USING_LISTENERS */ +#endif /* DROPBEAR_LISTENERS */ void send_msg_request_success() { CHECKCLEARTOWRITE();
--- a/common-kex.c Fri Mar 18 22:47:33 2016 +0800 +++ b/common-kex.c Fri Jul 22 00:08:02 2016 +0800 @@ -640,7 +640,7 @@ finish_kexhashbuf(); } -#ifdef DROPBEAR_ECDH +#if DROPBEAR_ECDH struct kex_ecdh_param *gen_kexecdh_param() { struct kex_ecdh_param *param = m_malloc(sizeof(*param)); if (ecc_make_key_ex(NULL, dropbear_ltc_prng, @@ -692,7 +692,7 @@ } #endif /* DROPBEAR_ECDH */ -#ifdef DROPBEAR_CURVE25519 +#if DROPBEAR_CURVE25519 struct kex_curve25519_param *gen_kexcurve25519_param () { /* Per http://cr.yp.to/ecdh.html */ struct kex_curve25519_param *param = m_malloc(sizeof(*param)); @@ -774,7 +774,7 @@ hash_desc->done(&hs, buf_getwriteptr(ses.hash, hash_desc->hashsize)); buf_setlen(ses.hash, hash_desc->hashsize); -#if defined(DEBUG_KEXHASH) && defined(DEBUG_TRACE) +#if (DEBUG_KEXHASH) && (DEBUG_TRACE) if (!debug_trace) { printhex("kexhashbuf", ses.kexhashbuf->data, ses.kexhashbuf->len); printhex("kexhash", ses.hash->data, ses.hash->len); @@ -814,7 +814,7 @@ int allgood = 1; /* we AND this with each goodguess and see if its still true after */ -#ifdef USE_KEXGUESS2 +#if DROPBEAR_KEXGUESS2 enum kexguess2_used kexguess2 = KEXGUESS2_LOOK; #else enum kexguess2_used kexguess2 = KEXGUESS2_NO;
--- a/common-runopts.c Fri Mar 18 22:47:33 2016 +0800 +++ b/common-runopts.c Fri Jul 22 00:08:02 2016 +0800 @@ -62,7 +62,7 @@ return ret; } -#ifdef ENABLE_USER_ALGO_LIST +#if DROPBEAR_USER_ALGO_LIST void parse_ciphers_macs() {
--- a/common-session.c Fri Mar 18 22:47:33 2016 +0800 +++ b/common-session.c Fri Jul 22 00:08:02 2016 +0800 @@ -54,7 +54,7 @@ void common_session_init(int sock_in, int sock_out) { time_t now; -#ifdef DEBUG_TRACE +#if DEBUG_TRACE debug_start_net(); #endif @@ -295,7 +295,7 @@ } /* After these are freed most functions will fail */ -#ifdef DROPBEAR_CLEANUP +#if DROPBEAR_CLEANUP /* listeners call cleanup functions, this should occur before other session state is freed. */ remove_all_listeners(); @@ -361,7 +361,7 @@ } if (!done) { - TRACE(("err: %s for '%s'\n", strerror(errno), linebuf)) + TRACE(("error reading remote ident: %s\n", strerror(errno))) ses.remoteclosed(); } else { /* linebuf is already null terminated */ @@ -550,10 +550,12 @@ static long select_timeout() { /* determine the minimum timeout that might be required, so as to avoid waking when unneccessary */ - long timeout = LONG_MAX; + long timeout = KEX_REKEY_TIMEOUT; long now = monotonic_now(); - update_timeout(KEX_REKEY_TIMEOUT, now, ses.kexstate.lastkextime, &timeout); + if (!ses.kexstate.sentkexinit) { + update_timeout(KEX_REKEY_TIMEOUT, now, ses.kexstate.lastkextime, &timeout); + } if (ses.authstate.authdone != 1 && IS_DROPBEAR_SERVER) { /* AUTH_TIMEOUT is only relevant before authdone */
--- a/crypto_desc.c Fri Mar 18 22:47:33 2016 +0800 +++ b/crypto_desc.c Fri Jul 22 00:08:02 2016 +0800 @@ -4,7 +4,7 @@ #include "ltc_prng.h" #include "ecc.h" -#ifdef DROPBEAR_LTC_PRNG +#if DROPBEAR_LTC_PRNG int dropbear_ltc_prng = -1; #endif @@ -14,16 +14,16 @@ void crypto_init() { const struct ltc_cipher_descriptor *regciphers[] = { -#ifdef DROPBEAR_AES +#if DROPBEAR_AES &aes_desc, #endif -#ifdef DROPBEAR_BLOWFISH +#if DROPBEAR_BLOWFISH &blowfish_desc, #endif -#ifdef DROPBEAR_TWOFISH +#if DROPBEAR_TWOFISH &twofish_desc, #endif -#ifdef DROPBEAR_3DES +#if DROPBEAR_3DES &des3_desc, #endif NULL @@ -32,16 +32,16 @@ const struct ltc_hash_descriptor *reghashes[] = { /* we need sha1 for hostkey stuff regardless */ &sha1_desc, -#ifdef DROPBEAR_MD5_HMAC +#if DROPBEAR_MD5_HMAC &md5_desc, #endif -#ifdef DROPBEAR_SHA256 +#if DROPBEAR_SHA256 &sha256_desc, #endif -#ifdef DROPBEAR_SHA384 +#if DROPBEAR_SHA384 &sha384_desc, #endif -#ifdef DROPBEAR_SHA512 +#if DROPBEAR_SHA512 &sha512_desc, #endif NULL @@ -60,14 +60,14 @@ } } -#ifdef DROPBEAR_LTC_PRNG +#if DROPBEAR_LTC_PRNG dropbear_ltc_prng = register_prng(&dropbear_prng_desc); if (dropbear_ltc_prng == -1) { dropbear_exit("Error registering crypto"); } #endif -#ifdef DROPBEAR_ECC +#if DROPBEAR_ECC ltc_mp = ltm_desc; dropbear_ecc_fill_dp(); #endif
--- a/dbrandom.c Fri Mar 18 22:47:33 2016 +0800 +++ b/dbrandom.c Fri Jul 22 00:08:02 2016 +0800 @@ -59,7 +59,7 @@ unsigned int readcount; int ret = DROPBEAR_FAILURE; -#ifdef DROPBEAR_PRNGD_SOCKET +#if DROPBEAR_PRNGD_SOCKET if (prngd) { readfd = connect_unix(filename); @@ -107,7 +107,7 @@ wantread = MIN(sizeof(readbuf), len-readcount); } -#ifdef DROPBEAR_PRNGD_SOCKET +#if DROPBEAR_PRNGD_SOCKET if (prngd) { char egdcmd[2]; @@ -185,7 +185,7 @@ /* existing state */ sha1_process(&hs, (void*)hashpool, sizeof(hashpool)); -#ifdef DROPBEAR_PRNGD_SOCKET +#if DROPBEAR_PRNGD_SOCKET if (process_file(&hs, DROPBEAR_PRNGD_SOCKET, INIT_SEED_SIZE, 1) != DROPBEAR_SUCCESS) { dropbear_exit("Failure reading random device %s",
--- a/dbutil.c Fri Mar 18 22:47:33 2016 +0800 +++ b/dbutil.c Fri Jul 22 00:08:02 2016 +0800 @@ -79,7 +79,7 @@ void (*_dropbear_log)(int priority, const char* format, va_list param) = generic_dropbear_log; -#ifdef DEBUG_TRACE +#if DEBUG_TRACE int debug_trace = 0; #endif @@ -149,7 +149,7 @@ } -#ifdef DEBUG_TRACE +#if DEBUG_TRACE static double debug_start_time = -1; @@ -182,7 +182,7 @@ void dropbear_trace(const char* format, ...) { va_list param; - if (!debug_trace) { + if (!ses.debug_trace) { return; } @@ -262,7 +262,7 @@ return DROPBEAR_FAILURE; } -#ifdef USE_VFORK +#if DROPBEAR_VFORK pid = vfork(); #else pid = fork(); @@ -371,7 +371,7 @@ execv(usershell, argv); } -#ifdef DEBUG_TRACE +#if DEBUG_TRACE void printhex(const char * label, const unsigned char * buf, int len) { int i; @@ -465,7 +465,7 @@ * authkeys file. * Will return DROPBEAR_SUCCESS if data is read, or DROPBEAR_FAILURE on EOF.*/ /* Only used for ~/.ssh/known_hosts and ~/.ssh/authorized_keys */ -#if defined(DROPBEAR_CLIENT) || defined(ENABLE_SVR_PUBKEY_AUTH) +#if DROPBEAR_CLIENT || DROPBEAR_SVR_PUBKEY_AUTH int buf_getline(buffer * line, FILE * authfile) { int c = EOF;
--- a/dbutil.h Fri Mar 18 22:47:33 2016 +0800 +++ b/dbutil.h Fri Jul 22 00:08:02 2016 +0800 @@ -45,7 +45,7 @@ void fail_assert(const char* expr, const char* file, int line) ATTRIB_NORETURN; -#ifdef DEBUG_TRACE +#if DEBUG_TRACE void dropbear_trace(const char* format, ...) ATTRIB_PRINTF(1,2); void dropbear_trace2(const char* format, ...) ATTRIB_PRINTF(1,2); void printhex(const char * label, const unsigned char * buf, int len);
--- a/debian/changelog Fri Mar 18 22:47:33 2016 +0800 +++ b/debian/changelog Fri Jul 22 00:08:02 2016 +0800 @@ -1,3 +1,9 @@ +dropbear (2016.74-0.1) unstable; urgency=low + + * New upstream release. + + -- Matt Johnston <[email protected]> Thu, 21 Jul 2016 22:51:57 +0800 + dropbear (2016.73-0.1) unstable; urgency=low * New upstream release.
--- a/debug.h Fri Mar 18 22:47:33 2016 +0800 +++ b/debug.h Fri Jul 22 00:08:02 2016 +0800 @@ -39,7 +39,9 @@ * Caution: Don't use this in an unfriendly environment (ie unfirewalled), * since the printing may not sanitise strings etc. This will add a reasonable * amount to your executable size. */ -/*#define DEBUG_TRACE*/ +#ifndef DEBUG_TRACE +#define DEBUG_TRACE 0 +#endif /* All functions writing to the cleartext payload buffer call * CHECKCLEARTOWRITE() before writing. This is only really useful if you're @@ -61,7 +63,7 @@ /*#define DEBUG_RSA*/ /* you don't need to touch this block */ -#ifdef DEBUG_TRACE +#if DEBUG_TRACE #define TRACE(X) dropbear_trace X; #define TRACE2(X) dropbear_trace2 X; #else /*DEBUG_TRACE*/
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/default_options.h Fri Jul 22 00:08:02 2016 +0800 @@ -0,0 +1,458 @@ +#ifndef DROPBEAR_DEFAULT_OPTIONS_H_ +#define DROPBEAR_DEFAULT_OPTIONS_H_ +/* + > > > Read This < < < + +default_options.h.in (this file) documents compile-time options, and provides +default values. + +Local customisation should be added to localoptions.h which is +used if it exists. Options defined there will override any options in this +file (#ifndef guards added by ifndef_wrapper.sh). + +Options can also be defined with -DDROPBEAR_XXX Makefile CFLAGS + +IMPORTANT: Many options will require "make clean" after changes */ + +#ifndef DROPBEAR_DEFPORT +#define DROPBEAR_DEFPORT "22" +#endif + +/* Listen on all interfaces */ +#ifndef DROPBEAR_DEFADDRESS +#define DROPBEAR_DEFADDRESS "" +#endif + +/* Default hostkey paths - these can be specified on the command line */ +#ifndef DSS_PRIV_FILENAME +#define DSS_PRIV_FILENAME "/etc/dropbear/dropbear_dss_host_key" +#endif +#ifndef RSA_PRIV_FILENAME +#define RSA_PRIV_FILENAME "/etc/dropbear/dropbear_rsa_host_key" +#endif +#ifndef ECDSA_PRIV_FILENAME +#define ECDSA_PRIV_FILENAME "/etc/dropbear/dropbear_ecdsa_host_key" +#endif + +/* Set NON_INETD_MODE if you require daemon functionality (ie Dropbear listens + * on chosen ports and keeps accepting connections. This is the default. + * + * Set INETD_MODE if you want to be able to run Dropbear with inetd (or + * similar), where it will use stdin/stdout for connections, and each process + * lasts for a single connection. Dropbear should be invoked with the -i flag + * for inetd, and can only accept IPv4 connections. + * + * Both of these flags can be defined at once, don't compile without at least + * one of them. */ +#ifndef NON_INETD_MODE +#define NON_INETD_MODE 1 +#endif +#ifndef INETD_MODE +#define INETD_MODE 1 +#endif + +/* Setting this disables the fast exptmod bignum code. It saves ~5kB, but is + * perhaps 20% slower for pubkey operations (it is probably worth experimenting + * if you want to use this) */ +/*#define NO_FAST_EXPTMOD*/ + +/* Set this if you want to use the DROPBEAR_SMALL_CODE option. This can save +several kB in binary size however will make the symmetrical ciphers and hashes +slower, perhaps by 50%. Recommended for small systems that aren't doing +much traffic. */ +#ifndef DROPBEAR_SMALL_CODE +#define DROPBEAR_SMALL_CODE 1 +#endif + +/* Enable X11 Forwarding - server only */ +#ifndef DROPBEAR_X11FWD +#define DROPBEAR_X11FWD 1 +#endif + +/* Enable TCP Fowarding */ +/* 'Local' is "-L" style (client listening port forwarded via server) + * 'Remote' is "-R" style (server listening port forwarded via client) */ + +#ifndef DROPBEAR_CLI_LOCALTCPFWD +#define DROPBEAR_CLI_LOCALTCPFWD 1 +#endif +#ifndef DROPBEAR_CLI_REMOTETCPFWD +#define DROPBEAR_CLI_REMOTETCPFWD 1 +#endif + +#ifndef DROPBEAR_SVR_LOCALTCPFWD +#define DROPBEAR_SVR_LOCALTCPFWD 1 +#endif +#ifndef DROPBEAR_SVR_REMOTETCPFWD +#define DROPBEAR_SVR_REMOTETCPFWD 1 +#endif + +/* Enable Authentication Agent Forwarding */ +#ifndef DROPBEAR_SVR_AGENTFWD +#define DROPBEAR_SVR_AGENTFWD 1 +#endif +#ifndef DROPBEAR_CLI_AGENTFWD +#define DROPBEAR_CLI_AGENTFWD 1 +#endif + + +/* Note: Both DROPBEAR_CLI_PROXYCMD and DROPBEAR_CLI_NETCAT must be set to + * allow multihop dbclient connections */ + +/* Allow using -J <proxycommand> to run the connection through a + pipe to a program, rather the normal TCP connection */ +#ifndef DROPBEAR_CLI_PROXYCMD +#define DROPBEAR_CLI_PROXYCMD 1 +#endif + +/* Enable "Netcat mode" option. This will forward standard input/output + * to a remote TCP-forwarded connection */ +#ifndef DROPBEAR_CLI_NETCAT +#define DROPBEAR_CLI_NETCAT 1 +#endif + +/* Whether to support "-c" and "-m" flags to choose ciphers/MACs at runtime */ +#ifndef ENABLE_USER_ALGO_LIST +#define ENABLE_USER_ALGO_LIST 1 +#endif + +/* Encryption - at least one required. + * Protocol RFC requires 3DES and recommends AES128 for interoperability. + * Including multiple keysize variants the same cipher + * (eg AES256 as well as AES128) will result in a minimal size increase.*/ +#ifndef DROPBEAR_AES128 +#define DROPBEAR_AES128 1 +#endif +#ifndef DROPBEAR_3DES +#define DROPBEAR_3DES 1 +#endif +#ifndef DROPBEAR_AES256 +#define DROPBEAR_AES256 1 +#endif +/* Compiling in Blowfish will add ~6kB to runtime heap memory usage */ +/*#define DROPBEAR_BLOWFISH*/ +#ifndef DROPBEAR_TWOFISH256 +#define DROPBEAR_TWOFISH256 1 +#endif +#ifndef DROPBEAR_TWOFISH128 +#define DROPBEAR_TWOFISH128 1 +#endif + +/* Enable CBC mode for ciphers. This has security issues though + * is the most compatible with older SSH implementations */ +#ifndef DROPBEAR_ENABLE_CBC_MODE +#define DROPBEAR_ENABLE_CBC_MODE 1 +#endif + +/* Enable "Counter Mode" for ciphers. This is more secure than normal + * CBC mode against certain attacks. It is recommended for security + * and forwards compatibility */ +#ifndef DROPBEAR_ENABLE_CTR_MODE +#define DROPBEAR_ENABLE_CTR_MODE 1 +#endif + +/* Twofish counter mode is disabled by default because it +has not been tested for interoperability with other SSH implementations. +If you test it please contact the Dropbear author */ +#ifndef DROPBEAR_TWOFISH_CTR +#define DROPBEAR_TWOFISH_CTR 0 +#endif + +/* Message integrity. sha2-256 is recommended as a default, + sha1 for compatibility */ +#ifndef DROPBEAR_SHA1_HMAC +#define DROPBEAR_SHA1_HMAC 1 +#endif +#ifndef DROPBEAR_SHA1_96_HMAC +#define DROPBEAR_SHA1_96_HMAC 1 +#endif +#ifndef DROPBEAR_SHA2_256_HMAC +#define DROPBEAR_SHA2_256_HMAC 1 +#endif +/* Default is to include it is sha512 is being compiled in for ECDSA */ +#ifndef DROPBEAR_SHA2_512_HMAC +#define DROPBEAR_SHA2_512_HMAC (DROPBEAR_ECDSA) +#endif + +/* XXX needed for fingerprints */ +#ifndef DROPBEAR_MD5_HMAC +#define DROPBEAR_MD5_HMAC 0 +#endif + +/* Hostkey/public key algorithms - at least one required, these are used + * for hostkey as well as for verifying signatures with pubkey auth. + * Removing either of these won't save very much space. + * RSA is recommended + * DSS may be necessary to connect to some systems though + is not recommended for new keys */ +#ifndef DROPBEAR_RSA +#define DROPBEAR_RSA 1 +#endif +#ifndef DROPBEAR_DSS +#define DROPBEAR_DSS 1 +#endif +/* ECDSA is significantly faster than RSA or DSS. Compiling in ECC + * code (either ECDSA or ECDH) increases binary size - around 30kB + * on x86-64 */ +#ifndef DROPBEAR_ECDSA +#define DROPBEAR_ECDSA 1 +#endif + +/* Add runtime flag "-R" to generate hostkeys as-needed when the first + connection using that key type occurs. + This avoids the need to otherwise run "dropbearkey" and avoids some problems + with badly seeded /dev/urandom when systems first boot. */ +#ifndef DROPBEAR_DELAY_HOSTKEY +#define DROPBEAR_DELAY_HOSTKEY 1 +#endif + +/* Enable Curve25519 for key exchange. This is another elliptic + * curve method with good security properties. Increases binary size + * by ~8kB on x86-64 */ +#ifndef DROPBEAR_CURVE25519 +#define DROPBEAR_CURVE25519 1 +#endif + +/* Enable elliptic curve Diffie Hellman key exchange, see note about + * ECDSA above */ +#ifndef DROPBEAR_ECDH +#define DROPBEAR_ECDH 1 +#endif + +/* Key exchange algorithm. + * group14_sha1 - 2048 bit, sha1 + * group14_sha256 - 2048 bit, sha2-256 + * group16 - 4096 bit, sha2-512 + * group1 - 1024 bit, sha1 + * + * group14 is supported by most implementations. + * group16 provides a greater strength level but is slower and increases binary size + * group1 is too small for security though is necessary if you need + compatibility with some implementations such as Dropbear versions < 0.53 + */ +#ifndef DROPBEAR_DH_GROUP1 +#define DROPBEAR_DH_GROUP1 1 +#endif +#ifndef DROPBEAR_DH_GROUP14_SHA1 +#define DROPBEAR_DH_GROUP14_SHA1 1 +#endif +#ifndef DROPBEAR_DH_GROUP14_SHA256 +#define DROPBEAR_DH_GROUP14_SHA256 1 +#endif +#ifndef DROPBEAR_DH_GROUP16 +#define DROPBEAR_DH_GROUP16 0 +#endif + +/* Control the memory/performance/compression tradeoff for zlib. + * Set windowBits=8 for least memory usage, see your system's + * zlib.h for full details. + * Default settings (windowBits=15) will use 256kB for compression + * windowBits=8 will use 129kB for compression. + * Both modes will use ~35kB for decompression (using windowBits=15 for + * interoperability) */ +#ifndef DROPBEAR_ZLIB_WINDOW_BITS +#define DROPBEAR_ZLIB_WINDOW_BITS 15 +#endif + +/* Whether to do reverse DNS lookups. */ +#ifndef DO_HOST_LOOKUP +#define DO_HOST_LOOKUP 0 +#endif + +/* Whether to print the message of the day (MOTD). */ +#ifndef DO_MOTD +#define DO_MOTD 0 +#endif + +/* The MOTD file path */ +#ifndef MOTD_FILENAME +#define MOTD_FILENAME "/etc/motd" +#endif + +/* Authentication Types - at least one required. + RFC Draft requires pubkey auth, and recommends password */ + +/* Note: PAM auth is quite simple and only works for PAM modules which just do + * a simple "Login: " "Password: " (you can edit the strings in svr-authpam.c). + * It's useful for systems like OS X where standard password crypts don't work + * but there's an interface via a PAM module. It won't work for more complex + * PAM challenge/response. + * You can't enable both PASSWORD and PAM. */ + +/* This requires crypt() */ +#ifdef HAVE_CRYPT +#ifndef DROPBEAR_SVR_PASSWORD_AUTH +#define DROPBEAR_SVR_PASSWORD_AUTH 1 +#endif +#else +#ifndef DROPBEAR_SVR_PASSWORD_AUTH +#define DROPBEAR_SVR_PASSWORD_AUTH 0 +#endif +#endif +/* PAM requires ./configure --enable-pam */ +#ifndef DROPBEAR_SVR_PAM_AUTH +#define DROPBEAR_SVR_PAM_AUTH 0 +#endif +#ifndef DROPBEAR_SVR_PUBKEY_AUTH +#define DROPBEAR_SVR_PUBKEY_AUTH 1 +#endif + +/* Whether to take public key options in + * authorized_keys file into account */ +#ifndef DROPBEAR_SVR_PUBKEY_OPTIONS +#define DROPBEAR_SVR_PUBKEY_OPTIONS 1 +#endif + +/* This requires getpass. */ +#ifdef HAVE_GETPASS +#ifndef DROPBEAR_CLI_PASSWORD_AUTH +#define DROPBEAR_CLI_PASSWORD_AUTH 1 +#endif +#ifndef DROPBEAR_CLI_INTERACT_AUTH +#define DROPBEAR_CLI_INTERACT_AUTH 1 +#endif +#endif +#ifndef DROPBEAR_CLI_PUBKEY_AUTH +#define DROPBEAR_CLI_PUBKEY_AUTH 1 +#endif + +/* A default argument for dbclient -i <privatekey>. +Homedir is prepended unless path begins with / */ +#ifndef DROPBEAR_DEFAULT_CLI_AUTHKEY +#define DROPBEAR_DEFAULT_CLI_AUTHKEY ".ssh/id_dropbear" +#endif + +/* This variable can be used to set a password for client + * authentication on the commandline. Beware of platforms + * that don't protect environment variables of processes etc. Also + * note that it will be provided for all "hidden" client-interactive + * style prompts - if you want something more sophisticated, use + * SSH_ASKPASS instead. Comment out this var to remove this functionality.*/ +#ifndef DROPBEAR_PASSWORD_ENV +#define DROPBEAR_PASSWORD_ENV "DROPBEAR_PASSWORD" +#endif + +/* Define this (as well as DROPBEAR_CLI_PASSWORD_AUTH) to allow the use of + * a helper program for the ssh client. The helper program should be + * specified in the SSH_ASKPASS environment variable, and dbclient + * should be run with DISPLAY set and no tty. The program should + * return the password on standard output */ +#ifndef DROPBEAR_CLI_ASKPASS_HELPER +#define DROPBEAR_CLI_ASKPASS_HELPER 0 +#endif + +/* Save a network roundtrip by sendng a real auth request immediately after + * sending a query for the available methods. It is at the expense of < 100 + * bytes of extra network traffic. This is not yet enabled by default since it + * could cause problems with non-compliant servers */ +#ifndef DROPBEAR_CLI_IMMEDIATE_AUTH +#define DROPBEAR_CLI_IMMEDIATE_AUTH 0 +#endif + +/* Source for randomness. This must be able to provide hundreds of bytes per SSH + * connection without blocking. In addition /dev/random is used for seeding + * rsa/dss key generation */ +#ifndef DROPBEAR_URANDOM_DEV +#define DROPBEAR_URANDOM_DEV "/dev/urandom" +#endif + +/* Set this to use PRNGD or EGD instead of /dev/urandom or /dev/random */ +/*#define DROPBEAR_PRNGD_SOCKET "/var/run/dropbear-rng"*/ + + +/* Specify the number of clients we will allow to be connected but + * not yet authenticated. After this limit, connections are rejected */ +/* The first setting is per-IP, to avoid denial of service */ +#ifndef MAX_UNAUTH_PER_IP +#define MAX_UNAUTH_PER_IP 5 +#endif + +/* And then a global limit to avoid chewing memory if connections + * come from many IPs */ +#ifndef MAX_UNAUTH_CLIENTS +#define MAX_UNAUTH_CLIENTS 30 +#endif + +/* Maximum number of failed authentication tries (server option) */ +#ifndef MAX_AUTH_TRIES +#define MAX_AUTH_TRIES 10 +#endif + +/* The default file to store the daemon's process ID, for shutdown + scripts etc. This can be overridden with the -P flag */ +#ifndef DROPBEAR_PIDFILE +#define DROPBEAR_PIDFILE "/var/run/dropbear.pid" +#endif + +/* The command to invoke for xauth when using X11 forwarding. + * "-q" for quiet */ +#ifndef XAUTH_COMMAND +#define XAUTH_COMMAND "/usr/bin/xauth -q" +#endif + +/* if you want to enable running an sftp server (such as the one included with + * OpenSSH), set the path below. If the path isn't defined, sftp will not + * be enabled */ +#ifndef SFTPSERVER_PATH +#define SFTPSERVER_PATH "/usr/libexec/sftp-server" +#endif + +/* This is used by the scp binary when used as a client binary. If you're + * not using the Dropbear client, you'll need to change it */ +#ifndef DROPBEAR_PATH_SSH_PROGRAM +#define DROPBEAR_PATH_SSH_PROGRAM "/usr/bin/dbclient" +#endif + +/* Whether to log commands executed by a client. This only logs the + * (single) command sent to the server, not what a user did in a + * shell/sftp session etc. */ +#ifndef LOG_COMMANDS +#define LOG_COMMANDS 0 +#endif + +/* Window size limits. These tend to be a trade-off between memory + usage and network performance: */ +/* Size of the network receive window. This amount of memory is allocated + as a per-channel receive buffer. Increasing this value can make a + significant difference to network performance. 24kB was empirically + chosen for a 100mbit ethernet network. The value can be altered at + runtime with the -W argument. */ +#ifndef DEFAULT_RECV_WINDOW +#define DEFAULT_RECV_WINDOW 24576 +#endif +/* Maximum size of a received SSH data packet - this _MUST_ be >= 32768 + in order to interoperate with other implementations */ +#ifndef RECV_MAX_PAYLOAD_LEN +#define RECV_MAX_PAYLOAD_LEN 32768 +#endif +/* Maximum size of a transmitted data packet - this can be any value, + though increasing it may not make a significant difference. */ +#ifndef TRANS_MAX_PAYLOAD_LEN +#define TRANS_MAX_PAYLOAD_LEN 16384 +#endif + +/* Ensure that data is transmitted every KEEPALIVE seconds. This can +be overridden at runtime with -K. 0 disables keepalives */ +#ifndef DEFAULT_KEEPALIVE +#define DEFAULT_KEEPALIVE 0 +#endif + +/* If this many KEEPALIVES are sent with no packets received from the +other side, exit. Not run-time configurable - if you have a need +for runtime configuration please mail the Dropbear list */ +#ifndef DEFAULT_KEEPALIVE_LIMIT +#define DEFAULT_KEEPALIVE_LIMIT 3 +#endif + +/* Ensure that data is received within IDLE_TIMEOUT seconds. This can +be overridden at runtime with -I. 0 disables idle timeouts */ +#ifndef DEFAULT_IDLE_TIMEOUT +#define DEFAULT_IDLE_TIMEOUT 0 +#endif + +/* The default path. This will often get replaced by the shell */ +#ifndef DEFAULT_PATH +#define DEFAULT_PATH "/usr/bin:/bin" +#endif + +#endif /* DROPBEAR_DEFAULT_OPTIONS_H_ */
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/default_options.h.in Fri Jul 22 00:08:02 2016 +0800 @@ -0,0 +1,312 @@ +#ifndef DROPBEAR_DEFAULT_OPTIONS_H_ +#define DROPBEAR_DEFAULT_OPTIONS_H_ +/* + > > > Read This < < < + +default_options.h.in (this file) documents compile-time options, and provides +default values. + +Local customisation should be added to localoptions.h which is +used if it exists. Options defined there will override any options in this +file (#ifndef guards added by ifndef_wrapper.sh). + +Options can also be defined with -DDROPBEAR_XXX Makefile CFLAGS + +IMPORTANT: Many options will require "make clean" after changes */ + +#define DROPBEAR_DEFPORT "22" + +/* Listen on all interfaces */ +#define DROPBEAR_DEFADDRESS "" + +/* Default hostkey paths - these can be specified on the command line */ +#define DSS_PRIV_FILENAME "/etc/dropbear/dropbear_dss_host_key" +#define RSA_PRIV_FILENAME "/etc/dropbear/dropbear_rsa_host_key" +#define ECDSA_PRIV_FILENAME "/etc/dropbear/dropbear_ecdsa_host_key" + +/* Set NON_INETD_MODE if you require daemon functionality (ie Dropbear listens + * on chosen ports and keeps accepting connections. This is the default. + * + * Set INETD_MODE if you want to be able to run Dropbear with inetd (or + * similar), where it will use stdin/stdout for connections, and each process + * lasts for a single connection. Dropbear should be invoked with the -i flag + * for inetd, and can only accept IPv4 connections. + * + * Both of these flags can be defined at once, don't compile without at least + * one of them. */ +#define NON_INETD_MODE 1 +#define INETD_MODE 1 + +/* Setting this disables the fast exptmod bignum code. It saves ~5kB, but is + * perhaps 20% slower for pubkey operations (it is probably worth experimenting + * if you want to use this) */ +/*#define NO_FAST_EXPTMOD*/ + +/* Set this if you want to use the DROPBEAR_SMALL_CODE option. This can save +several kB in binary size however will make the symmetrical ciphers and hashes +slower, perhaps by 50%. Recommended for small systems that aren't doing +much traffic. */ +#define DROPBEAR_SMALL_CODE 1 + +/* Enable X11 Forwarding - server only */ +#define DROPBEAR_X11FWD 1 + +/* Enable TCP Fowarding */ +/* 'Local' is "-L" style (client listening port forwarded via server) + * 'Remote' is "-R" style (server listening port forwarded via client) */ + +#define DROPBEAR_CLI_LOCALTCPFWD 1 +#define DROPBEAR_CLI_REMOTETCPFWD 1 + +#define DROPBEAR_SVR_LOCALTCPFWD 1 +#define DROPBEAR_SVR_REMOTETCPFWD 1 + +/* Enable Authentication Agent Forwarding */ +#define DROPBEAR_SVR_AGENTFWD 1 +#define DROPBEAR_CLI_AGENTFWD 1 + + +/* Note: Both DROPBEAR_CLI_PROXYCMD and DROPBEAR_CLI_NETCAT must be set to + * allow multihop dbclient connections */ + +/* Allow using -J <proxycommand> to run the connection through a + pipe to a program, rather the normal TCP connection */ +#define DROPBEAR_CLI_PROXYCMD 1 + +/* Enable "Netcat mode" option. This will forward standard input/output + * to a remote TCP-forwarded connection */ +#define DROPBEAR_CLI_NETCAT 1 + +/* Whether to support "-c" and "-m" flags to choose ciphers/MACs at runtime */ +#define ENABLE_USER_ALGO_LIST 1 + +/* Encryption - at least one required. + * Protocol RFC requires 3DES and recommends AES128 for interoperability. + * Including multiple keysize variants the same cipher + * (eg AES256 as well as AES128) will result in a minimal size increase.*/ +#define DROPBEAR_AES128 1 +#define DROPBEAR_3DES 1 +#define DROPBEAR_AES256 1 +/* Compiling in Blowfish will add ~6kB to runtime heap memory usage */ +/*#define DROPBEAR_BLOWFISH*/ +#define DROPBEAR_TWOFISH256 1 +#define DROPBEAR_TWOFISH128 1 + +/* Enable CBC mode for ciphers. This has security issues though + * is the most compatible with older SSH implementations */ +#define DROPBEAR_ENABLE_CBC_MODE 1 + +/* Enable "Counter Mode" for ciphers. This is more secure than normal + * CBC mode against certain attacks. It is recommended for security + * and forwards compatibility */ +#define DROPBEAR_ENABLE_CTR_MODE 1 + +/* Twofish counter mode is disabled by default because it +has not been tested for interoperability with other SSH implementations. +If you test it please contact the Dropbear author */ +#define DROPBEAR_TWOFISH_CTR 0 + +/* Message integrity. sha2-256 is recommended as a default, + sha1 for compatibility */ +#define DROPBEAR_SHA1_HMAC 1 +#define DROPBEAR_SHA1_96_HMAC 1 +#define DROPBEAR_SHA2_256_HMAC 1 +/* Default is to include it is sha512 is being compiled in for ECDSA */ +#define DROPBEAR_SHA2_512_HMAC (DROPBEAR_ECDSA) + +/* XXX needed for fingerprints */ +#define DROPBEAR_MD5_HMAC 0 + +/* Hostkey/public key algorithms - at least one required, these are used + * for hostkey as well as for verifying signatures with pubkey auth. + * Removing either of these won't save very much space. + * RSA is recommended + * DSS may be necessary to connect to some systems though + is not recommended for new keys */ +#define DROPBEAR_RSA 1 +#define DROPBEAR_DSS 1 +/* ECDSA is significantly faster than RSA or DSS. Compiling in ECC + * code (either ECDSA or ECDH) increases binary size - around 30kB + * on x86-64 */ +#define DROPBEAR_ECDSA 1 + +/* Add runtime flag "-R" to generate hostkeys as-needed when the first + connection using that key type occurs. + This avoids the need to otherwise run "dropbearkey" and avoids some problems + with badly seeded /dev/urandom when systems first boot. */ +#define DROPBEAR_DELAY_HOSTKEY 1 + +/* Enable Curve25519 for key exchange. This is another elliptic + * curve method with good security properties. Increases binary size + * by ~8kB on x86-64 */ +#define DROPBEAR_CURVE25519 1 + +/* Enable elliptic curve Diffie Hellman key exchange, see note about + * ECDSA above */ +#define DROPBEAR_ECDH 1 + +/* Key exchange algorithm. + * group14_sha1 - 2048 bit, sha1 + * group14_sha256 - 2048 bit, sha2-256 + * group16 - 4096 bit, sha2-512 + * group1 - 1024 bit, sha1 + * + * group14 is supported by most implementations. + * group16 provides a greater strength level but is slower and increases binary size + * group1 is too small for security though is necessary if you need + compatibility with some implementations such as Dropbear versions < 0.53 + */ +#define DROPBEAR_DH_GROUP1 1 +#define DROPBEAR_DH_GROUP14_SHA1 1 +#define DROPBEAR_DH_GROUP14_SHA256 1 +#define DROPBEAR_DH_GROUP16 0 + +/* Control the memory/performance/compression tradeoff for zlib. + * Set windowBits=8 for least memory usage, see your system's + * zlib.h for full details. + * Default settings (windowBits=15) will use 256kB for compression + * windowBits=8 will use 129kB for compression. + * Both modes will use ~35kB for decompression (using windowBits=15 for + * interoperability) */ +#define DROPBEAR_ZLIB_WINDOW_BITS 15 + +/* Whether to do reverse DNS lookups. */ +#define DO_HOST_LOOKUP 0 + +/* Whether to print the message of the day (MOTD). */ +#define DO_MOTD 0 + +/* The MOTD file path */ +#define MOTD_FILENAME "/etc/motd" + +/* Authentication Types - at least one required. + RFC Draft requires pubkey auth, and recommends password */ + +/* Note: PAM auth is quite simple and only works for PAM modules which just do + * a simple "Login: " "Password: " (you can edit the strings in svr-authpam.c). + * It's useful for systems like OS X where standard password crypts don't work + * but there's an interface via a PAM module. It won't work for more complex + * PAM challenge/response. + * You can't enable both PASSWORD and PAM. */ + +/* This requires crypt() */ +#ifdef HAVE_CRYPT +#define DROPBEAR_SVR_PASSWORD_AUTH 1 +#else +#define DROPBEAR_SVR_PASSWORD_AUTH 0 +#endif +/* PAM requires ./configure --enable-pam */ +#define DROPBEAR_SVR_PAM_AUTH 0 +#define DROPBEAR_SVR_PUBKEY_AUTH 1 + +/* Whether to take public key options in + * authorized_keys file into account */ +#define DROPBEAR_SVR_PUBKEY_OPTIONS 1 + +/* This requires getpass. */ +#ifdef HAVE_GETPASS +#define DROPBEAR_CLI_PASSWORD_AUTH 1 +#define DROPBEAR_CLI_INTERACT_AUTH 1 +#endif +#define DROPBEAR_CLI_PUBKEY_AUTH 1 + +/* A default argument for dbclient -i <privatekey>. +Homedir is prepended unless path begins with / */ +#define DROPBEAR_DEFAULT_CLI_AUTHKEY ".ssh/id_dropbear" + +/* This variable can be used to set a password for client + * authentication on the commandline. Beware of platforms + * that don't protect environment variables of processes etc. Also + * note that it will be provided for all "hidden" client-interactive + * style prompts - if you want something more sophisticated, use + * SSH_ASKPASS instead. Comment out this var to remove this functionality.*/ +#define DROPBEAR_PASSWORD_ENV "DROPBEAR_PASSWORD" + +/* Define this (as well as DROPBEAR_CLI_PASSWORD_AUTH) to allow the use of + * a helper program for the ssh client. The helper program should be + * specified in the SSH_ASKPASS environment variable, and dbclient + * should be run with DISPLAY set and no tty. The program should + * return the password on standard output */ +#define DROPBEAR_CLI_ASKPASS_HELPER 0 + +/* Save a network roundtrip by sendng a real auth request immediately after + * sending a query for the available methods. It is at the expense of < 100 + * bytes of extra network traffic. This is not yet enabled by default since it + * could cause problems with non-compliant servers */ +#define DROPBEAR_CLI_IMMEDIATE_AUTH 0 + +/* Source for randomness. This must be able to provide hundreds of bytes per SSH + * connection without blocking. In addition /dev/random is used for seeding + * rsa/dss key generation */ +#define DROPBEAR_URANDOM_DEV "/dev/urandom" + +/* Set this to use PRNGD or EGD instead of /dev/urandom or /dev/random */ +/*#define DROPBEAR_PRNGD_SOCKET "/var/run/dropbear-rng"*/ + + +/* Specify the number of clients we will allow to be connected but + * not yet authenticated. After this limit, connections are rejected */ +/* The first setting is per-IP, to avoid denial of service */ +#define MAX_UNAUTH_PER_IP 5 + +/* And then a global limit to avoid chewing memory if connections + * come from many IPs */ +#define MAX_UNAUTH_CLIENTS 30 + +/* Maximum number of failed authentication tries (server option) */ +#define MAX_AUTH_TRIES 10 + +/* The default file to store the daemon's process ID, for shutdown + scripts etc. This can be overridden with the -P flag */ +#define DROPBEAR_PIDFILE "/var/run/dropbear.pid" + +/* The command to invoke for xauth when using X11 forwarding. + * "-q" for quiet */ +#define XAUTH_COMMAND "/usr/bin/xauth -q" + +/* if you want to enable running an sftp server (such as the one included with + * OpenSSH), set the path below. If the path isn't defined, sftp will not + * be enabled */ +#define SFTPSERVER_PATH "/usr/libexec/sftp-server" + +/* This is used by the scp binary when used as a client binary. If you're + * not using the Dropbear client, you'll need to change it */ +#define DROPBEAR_PATH_SSH_PROGRAM "/usr/bin/dbclient" + +/* Whether to log commands executed by a client. This only logs the + * (single) command sent to the server, not what a user did in a + * shell/sftp session etc. */ +#define LOG_COMMANDS 0 + +/* Window size limits. These tend to be a trade-off between memory + usage and network performance: */ +/* Size of the network receive window. This amount of memory is allocated + as a per-channel receive buffer. Increasing this value can make a + significant difference to network performance. 24kB was empirically + chosen for a 100mbit ethernet network. The value can be altered at + runtime with the -W argument. */ +#define DEFAULT_RECV_WINDOW 24576 +/* Maximum size of a received SSH data packet - this _MUST_ be >= 32768 + in order to interoperate with other implementations */ +#define RECV_MAX_PAYLOAD_LEN 32768 +/* Maximum size of a transmitted data packet - this can be any value, + though increasing it may not make a significant difference. */ +#define TRANS_MAX_PAYLOAD_LEN 16384 + +/* Ensure that data is transmitted every KEEPALIVE seconds. This can +be overridden at runtime with -K. 0 disables keepalives */ +#define DEFAULT_KEEPALIVE 0 + +/* If this many KEEPALIVES are sent with no packets received from the +other side, exit. Not run-time configurable - if you have a need +for runtime configuration please mail the Dropbear list */ +#define DEFAULT_KEEPALIVE_LIMIT 3 + +/* Ensure that data is received within IDLE_TIMEOUT seconds. This can +be overridden at runtime with -I. 0 disables idle timeouts */ +#define DEFAULT_IDLE_TIMEOUT 0 + +/* The default path. This will often get replaced by the shell */ +#define DEFAULT_PATH "/usr/bin:/bin" + +#endif /* DROPBEAR_DEFAULT_OPTIONS_H_ */
--- a/dropbear.8 Fri Mar 18 22:47:33 2016 +0800 +++ b/dropbear.8 Fri Jul 22 00:08:02 2016 +0800 @@ -91,6 +91,10 @@ .B \-I \fIidle_timeout Disconnect the session if no traffic is transmitted or received for \fIidle_timeout\fR seconds. .TP +.B \-c \fIforced_command +Disregard the command provided by the user and always run \fIforced_command\fR. This also +overrides any authorized_keys command= option. +.TP .B \-V Print the version @@ -129,6 +133,7 @@ .TP .B command=\fR"\fIforced_command\fR" Disregard the command provided by the user and always run \fIforced_command\fR. +The -c command line option overrides this. The authorized_keys file and its containing ~/.ssh directory must only be writable by the user, otherwise Dropbear will not allow a login using public
--- a/dropbearconvert.c Fri Mar 18 22:47:33 2016 +0800 +++ b/dropbearconvert.c Fri Jul 22 00:08:02 2016 +0800 @@ -53,8 +53,8 @@ progname); } -#if defined(DBMULTI_dropbearconvert) || !defined(DROPBEAR_MULTI) -#if defined(DBMULTI_dropbearconvert) && defined(DROPBEAR_MULTI) +#if defined(DBMULTI_dropbearconvert) || !DROPBEAR_MULTI +#if defined(DBMULTI_dropbearconvert) && DROPBEAR_MULTI int dropbearconvert_main(int argc, char ** argv) { #else int main(int argc, char ** argv) { @@ -67,7 +67,7 @@ crypto_init(); seedrandom(); -#ifdef DEBUG_TRACE +#if DEBUG_TRACE /* It's hard for it to get in the way _too_ much */ debug_trace = 1; #endif
--- a/dropbearkey.c Fri Mar 18 22:47:33 2016 +0800 +++ b/dropbearkey.c Fri Jul 22 00:08:02 2016 +0800 @@ -67,36 +67,36 @@ fprintf(stderr, "Usage: %s -t <type> -f <filename> [-s bits]\n" "-t type Type of key to generate. One of:\n" -#ifdef DROPBEAR_RSA +#if DROPBEAR_RSA " rsa\n" #endif -#ifdef DROPBEAR_DSS +#if DROPBEAR_DSS " dss\n" #endif -#ifdef DROPBEAR_ECDSA +#if DROPBEAR_ECDSA " ecdsa\n" #endif "-f filename Use filename for the secret key.\n" " ~/.ssh/id_dropbear is recommended for client keys.\n" "-s bits Key size in bits, should be a multiple of 8 (optional)\n" -#ifdef DROPBEAR_DSS +#if DROPBEAR_DSS " DSS has a fixed size of 1024 bits\n" #endif -#ifdef DROPBEAR_ECDSA +#if DROPBEAR_ECDSA " ECDSA has sizes " -#ifdef DROPBEAR_ECC_256 +#if DROPBEAR_ECC_256 "256 " #endif -#ifdef DROPBEAR_ECC_384 +#if DROPBEAR_ECC_384 "384 " #endif -#ifdef DROPBEAR_ECC_521 +#if DROPBEAR_ECC_521 "521 " #endif "\n" #endif "-y Just print the publickey and fingerprint for the\n private key in <filename>.\n" -#ifdef DEBUG_TRACE +#if DEBUG_TRACE "-v verbose\n" #endif ,progname); @@ -106,7 +106,7 @@ static void check_signkey_bits(enum signkey_type type, int bits) { switch (type) { -#ifdef DROPBEAR_RSA +#if DROPBEAR_RSA case DROPBEAR_SIGNKEY_RSA: if (bits < 512 || bits > 4096 || (bits % 8 != 0)) { dropbear_exit("Bits must satisfy 512 <= bits <= 4096, and be a" @@ -126,8 +126,8 @@ } } -#if defined(DBMULTI_dropbearkey) || !defined(DROPBEAR_MULTI) -#if defined(DBMULTI_dropbearkey) && defined(DROPBEAR_MULTI) +#if defined(DBMULTI_dropbearkey) || !DROPBEAR_MULTI +#if defined(DBMULTI_dropbearkey) && DROPBEAR_MULTI int dropbearkey_main(int argc, char ** argv) { #else int main(int argc, char ** argv) { @@ -174,7 +174,7 @@ printhelp(argv[0]); exit(EXIT_SUCCESS); break; -#ifdef DEBUG_TRACE +#if DEBUG_TRACE case 'v': debug_trace = 1; break; @@ -206,19 +206,19 @@ exit(EXIT_FAILURE); } -#ifdef DROPBEAR_RSA +#if DROPBEAR_RSA if (strcmp(typetext, "rsa") == 0) { keytype = DROPBEAR_SIGNKEY_RSA; } #endif -#ifdef DROPBEAR_DSS +#if DROPBEAR_DSS if (strcmp(typetext, "dss") == 0) { keytype = DROPBEAR_SIGNKEY_DSS; } #endif -#ifdef DROPBEAR_ECDSA +#if DROPBEAR_ECDSA if (strcmp(typetext, "ecdsa") == 0) { keytype = DROPBEAR_SIGNKEY_ECDSA_KEYGEN;
--- a/dss.c Fri Mar 18 22:47:33 2016 +0800 +++ b/dss.c Fri Jul 22 00:08:02 2016 +0800 @@ -37,7 +37,7 @@ * See FIPS186 or the Handbook of Applied Cryptography for details of the * algorithm */ -#ifdef DROPBEAR_DSS +#if DROPBEAR_DSS /* Load a dss key from a buffer, initialising the values. * The key will have the same format as buf_put_dss_key. @@ -153,7 +153,7 @@ } -#ifdef DROPBEAR_SIGNKEY_VERIFY +#if DROPBEAR_SIGNKEY_VERIFY /* Verify a DSS signature (in buf) made on data by the key given. * returns DROPBEAR_SUCCESS or DROPBEAR_FAILURE */ int buf_dss_verify(buffer* buf, dropbear_dss_key *key, buffer *data_buf) {
--- a/dss.h Fri Mar 18 22:47:33 2016 +0800 +++ b/dss.h Fri Jul 22 00:08:02 2016 +0800 @@ -28,7 +28,7 @@ #include "includes.h" #include "buffer.h" -#ifdef DROPBEAR_DSS +#if DROPBEAR_DSS typedef struct { @@ -42,7 +42,7 @@ } dropbear_dss_key; void buf_put_dss_sign(buffer* buf, dropbear_dss_key *key, buffer *data_buf); -#ifdef DROPBEAR_SIGNKEY_VERIFY +#if DROPBEAR_SIGNKEY_VERIFY int buf_dss_verify(buffer* buf, dropbear_dss_key *key, buffer *data_buf); #endif int buf_get_dss_pub_key(buffer* buf, dropbear_dss_key *key);
--- a/ecc.c Fri Mar 18 22:47:33 2016 +0800 +++ b/ecc.c Fri Jul 22 00:08:02 2016 +0800 @@ -4,10 +4,10 @@ #include "dbutil.h" #include "bignum.h" -#ifdef DROPBEAR_ECC +#if DROPBEAR_ECC /* .dp members are filled out by dropbear_ecc_fill_dp() at startup */ -#ifdef DROPBEAR_ECC_256 +#if DROPBEAR_ECC_256 struct dropbear_ecc_curve ecc_curve_nistp256 = { 32, /* .ltc_size */ NULL, /* .dp */ @@ -15,7 +15,7 @@ "nistp256" /* .name */ }; #endif -#ifdef DROPBEAR_ECC_384 +#if DROPBEAR_ECC_384 struct dropbear_ecc_curve ecc_curve_nistp384 = { 48, /* .ltc_size */ NULL, /* .dp */ @@ -23,7 +23,7 @@ "nistp384" /* .name */ }; #endif -#ifdef DROPBEAR_ECC_521 +#if DROPBEAR_ECC_521 struct dropbear_ecc_curve ecc_curve_nistp521 = { 66, /* .ltc_size */ NULL, /* .dp */ @@ -33,13 +33,13 @@ #endif struct dropbear_ecc_curve *dropbear_ecc_curves[] = { -#ifdef DROPBEAR_ECC_256 +#if DROPBEAR_ECC_256 &ecc_curve_nistp256, #endif -#ifdef DROPBEAR_ECC_384 +#if DROPBEAR_ECC_384 &ecc_curve_nistp384, #endif -#ifdef DROPBEAR_ECC_521 +#if DROPBEAR_ECC_521 &ecc_curve_nistp521, #endif NULL
--- a/ecc.h Fri Mar 18 22:47:33 2016 +0800 +++ b/ecc.h Fri Jul 22 00:08:02 2016 +0800 @@ -6,7 +6,7 @@ #include "buffer.h" -#ifdef DROPBEAR_ECC +#if DROPBEAR_ECC struct dropbear_ecc_curve { int ltc_size; /* to match the byte sizes in ltc_ecc_sets[] */
--- a/ecdsa.c Fri Mar 18 22:47:33 2016 +0800 +++ b/ecdsa.c Fri Jul 22 00:08:02 2016 +0800 @@ -6,7 +6,7 @@ #include "ecdsa.h" #include "signkey.h" -#ifdef DROPBEAR_ECDSA +#if DROPBEAR_ECDSA int signkey_is_ecdsa(enum signkey_type type) { @@ -16,17 +16,17 @@ } enum signkey_type ecdsa_signkey_type(ecc_key * key) { -#ifdef DROPBEAR_ECC_256 +#if DROPBEAR_ECC_256 if (key->dp == ecc_curve_nistp256.dp) { return DROPBEAR_SIGNKEY_ECDSA_NISTP256; } #endif -#ifdef DROPBEAR_ECC_384 +#if DROPBEAR_ECC_384 if (key->dp == ecc_curve_nistp384.dp) { return DROPBEAR_SIGNKEY_ECDSA_NISTP384; } #endif -#ifdef DROPBEAR_ECC_521 +#if DROPBEAR_ECC_521 if (key->dp == ecc_curve_nistp521.dp) { return DROPBEAR_SIGNKEY_ECDSA_NISTP521; } @@ -38,17 +38,17 @@ const ltc_ecc_set_type *dp = NULL; /* curve domain parameters */ ecc_key *new_key = NULL; switch (bit_size) { -#ifdef DROPBEAR_ECC_256 +#if DROPBEAR_ECC_256 case 256: dp = ecc_curve_nistp256.dp; break; #endif -#ifdef DROPBEAR_ECC_384 +#if DROPBEAR_ECC_384 case 384: dp = ecc_curve_nistp384.dp; break; #endif -#ifdef DROPBEAR_ECC_521 +#if DROPBEAR_ECC_521 case 521: dp = ecc_curve_nistp521.dp; break; @@ -56,13 +56,13 @@ } if (!dp) { dropbear_exit("Key size %d isn't valid. Try " -#ifdef DROPBEAR_ECC_256 +#if DROPBEAR_ECC_256 "256 " #endif -#ifdef DROPBEAR_ECC_384 +#if DROPBEAR_ECC_384 "384 " #endif -#ifdef DROPBEAR_ECC_521 +#if DROPBEAR_ECC_521 "521 " #endif , bit_size);
--- a/ecdsa.h Fri Mar 18 22:47:33 2016 +0800 +++ b/ecdsa.h Fri Jul 22 00:08:02 2016 +0800 @@ -5,14 +5,14 @@ #include "buffer.h" #include "signkey.h" -#ifdef DROPBEAR_ECDSA +#if DROPBEAR_ECDSA /* Prefer the larger size - it's fast anyway */ -#if defined(DROPBEAR_ECC_521) +#if DROPBEAR_ECC_521 #define ECDSA_DEFAULT_SIZE 521 -#elif defined(DROPBEAR_ECC_384) +#elif DROPBEAR_ECC_384 #define ECDSA_DEFAULT_SIZE 384 -#elif defined(DROPBEAR_ECC_256) +#elif DROPBEAR_ECC_256 #define ECDSA_DEFAULT_SIZE 256 #else #define ECDSA_DEFAULT_SIZE 0
--- a/gendss.c Fri Mar 18 22:47:33 2016 +0800 +++ b/gendss.c Fri Jul 22 00:08:02 2016 +0800 @@ -35,7 +35,7 @@ /* This is just a test */ -#ifdef DROPBEAR_DSS +#if DROPBEAR_DSS static void getq(dropbear_dss_key *key); static void getp(dropbear_dss_key *key, unsigned int size);
--- a/gendss.h Fri Mar 18 22:47:33 2016 +0800 +++ b/gendss.h Fri Jul 22 00:08:02 2016 +0800 @@ -27,7 +27,7 @@ #include "dss.h" -#ifdef DROPBEAR_DSS +#if DROPBEAR_DSS dropbear_dss_key * gen_dss_priv_key(unsigned int size);
--- a/genrsa.c Fri Mar 18 22:47:33 2016 +0800 +++ b/genrsa.c Fri Jul 22 00:08:02 2016 +0800 @@ -31,7 +31,7 @@ #define RSA_E 65537 -#ifdef DROPBEAR_RSA +#if DROPBEAR_RSA static void getrsaprime(mp_int* prime, mp_int *primeminus, mp_int* rsa_e, unsigned int size_bytes);
--- a/genrsa.h Fri Mar 18 22:47:33 2016 +0800 +++ b/genrsa.h Fri Jul 22 00:08:02 2016 +0800 @@ -27,7 +27,7 @@ #include "rsa.h" -#ifdef DROPBEAR_RSA +#if DROPBEAR_RSA dropbear_rsa_key * gen_rsa_priv_key(unsigned int size);
--- a/gensignkey.c Fri Mar 18 22:47:33 2016 +0800 +++ b/gensignkey.c Fri Jul 22 00:08:02 2016 +0800 @@ -53,15 +53,15 @@ static int get_default_bits(enum signkey_type keytype) { switch (keytype) { -#ifdef DROPBEAR_RSA +#if DROPBEAR_RSA case DROPBEAR_SIGNKEY_RSA: return RSA_DEFAULT_SIZE; #endif -#ifdef DROPBEAR_DSS +#if DROPBEAR_DSS case DROPBEAR_SIGNKEY_DSS: return DSS_DEFAULT_SIZE; #endif -#ifdef DROPBEAR_ECDSA +#if DROPBEAR_ECDSA case DROPBEAR_SIGNKEY_ECDSA_KEYGEN: return ECDSA_DEFAULT_SIZE; case DROPBEAR_SIGNKEY_ECDSA_NISTP521: @@ -92,17 +92,17 @@ seedrandom(); switch(keytype) { -#ifdef DROPBEAR_RSA +#if DROPBEAR_RSA case DROPBEAR_SIGNKEY_RSA: key->rsakey = gen_rsa_priv_key(bits); break; #endif -#ifdef DROPBEAR_DSS +#if DROPBEAR_DSS case DROPBEAR_SIGNKEY_DSS: key->dsskey = gen_dss_priv_key(bits); break; #endif -#ifdef DROPBEAR_ECDSA +#if DROPBEAR_ECDSA case DROPBEAR_SIGNKEY_ECDSA_KEYGEN: case DROPBEAR_SIGNKEY_ECDSA_NISTP521: case DROPBEAR_SIGNKEY_ECDSA_NISTP384:
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/ifndef_wrapper.sh Fri Jul 22 00:08:02 2016 +0800 @@ -0,0 +1,7 @@ +#!/bin/sh + +# Wrap all "#define X Y" with a #ifndef X...#endif" + +sed -E 's/^(#define ([^ ]+) .*)/#ifndef \2\ +\1\ +#endif/'
--- a/kex.h Fri Mar 18 22:47:33 2016 +0800 +++ b/kex.h Fri Jul 22 00:08:02 2016 +0800 @@ -40,14 +40,14 @@ void kexdh_comb_key(struct kex_dh_param *param, mp_int *dh_pub_them, sign_key *hostkey); -#ifdef DROPBEAR_ECDH +#if DROPBEAR_ECDH struct kex_ecdh_param *gen_kexecdh_param(void); void free_kexecdh_param(struct kex_ecdh_param *param); void kexecdh_comb_key(struct kex_ecdh_param *param, buffer *pub_them, sign_key *hostkey); #endif -#ifdef DROPBEAR_CURVE25519 +#if DROPBEAR_CURVE25519 struct kex_curve25519_param *gen_kexcurve25519_param(void); void free_kexcurve25519_param(struct kex_curve25519_param *param); void kexcurve25519_comb_key(struct kex_curve25519_param *param, buffer *pub_them, @@ -88,13 +88,13 @@ mp_int priv; /* x */ }; -#ifdef DROPBEAR_ECDH +#if DROPBEAR_ECDH struct kex_ecdh_param { ecc_key key; }; #endif -#ifdef DROPBEAR_CURVE25519 +#if DROPBEAR_CURVE25519 #define CURVE25519_LEN 32 struct kex_curve25519_param { unsigned char priv[CURVE25519_LEN];
--- a/keyimport.c Fri Mar 18 22:47:33 2016 +0800 +++ b/keyimport.c Fri Jul 22 00:08:02 2016 +0800 @@ -36,9 +36,11 @@ #include "dbutil.h" #include "ecc.h" +#if DROPBEAR_ECDSA static const unsigned char OID_SEC256R1_BLOB[] = {0x2a, 0x86, 0x48, 0xce, 0x3d, 0x03, 0x01, 0x07}; static const unsigned char OID_SEC384R1_BLOB[] = {0x2b, 0x81, 0x04, 0x00, 0x22}; static const unsigned char OID_SEC521R1_BLOB[] = {0x2b, 0x81, 0x04, 0x00, 0x23}; +#endif #define PUT_32BIT(cp, value) do { \ (cp)[3] = (unsigned char)(value); \ @@ -60,6 +62,8 @@ static int dropbear_write(const char*filename, sign_key * key); static sign_key *dropbear_read(const char* filename); +static int toint(unsigned u); + #if 0 static int sshcom_encrypted(const char *filename, char **comment); static struct ssh2_userkey *sshcom_read(const char *filename, char *passphrase); @@ -241,12 +245,11 @@ if ((*p & 0x1F) == 0x1F) { *id = 0; while (*p & 0x80) { - *id = (*id << 7) | (*p & 0x7F); p++, sourcelen--; if (sourcelen == 0) return -1; + *id = (*id << 7) | (*p & 0x7F); } - *id = (*id << 7) | (*p & 0x7F); p++, sourcelen--; } else { *id = *p & 0x1F; @@ -257,19 +260,26 @@ return -1; if (*p & 0x80) { + unsigned len; int n = *p & 0x7F; p++, sourcelen--; if (sourcelen < n) return -1; - *length = 0; + len = 0; while (n--) - *length = (*length << 8) | (*p++); + len = (len << 8) | (*p++); sourcelen -= n; + *length = toint(len); } else { *length = *p; p++, sourcelen--; } + if (*length < 0) { + printf("Negative ASN.1 length\n"); + return -1; + } + return p - (unsigned char *) source; } @@ -467,7 +477,7 @@ m_burn(buffer, sizeof(buffer)); return ret; - error: +error: m_burn(buffer, sizeof(buffer)); if (ret) { if (ret->keyblob) { @@ -582,8 +592,9 @@ /* Expect the SEQUENCE header. Take its absence as a failure to decrypt. */ ret = ber_read_id_len(p, key->keyblob_len, &id, &len, &flags); p += ret; - if (ret < 0 || id != 16) { - errmsg = "ASN.1 decoding failure - wrong password?"; + if (ret < 0 || id != 16 || len < 0 || + key->keyblob+key->keyblob_len-p < len) { + errmsg = "ASN.1 decoding failure"; goto error; } @@ -600,13 +611,13 @@ */ blobbuf = buf_new(3000); -#ifdef DROPBEAR_DSS +#if DROPBEAR_DSS if (key->type == OSSH_DSA) { buf_putstring(blobbuf, "ssh-dss", 7); retkey->type = DROPBEAR_SIGNKEY_DSS; } #endif -#ifdef DROPBEAR_RSA +#if DROPBEAR_RSA if (key->type == OSSH_RSA) { buf_putstring(blobbuf, "ssh-rsa", 7); retkey->type = DROPBEAR_SIGNKEY_RSA; @@ -617,7 +628,7 @@ ret = ber_read_id_len(p, key->keyblob+key->keyblob_len-p, &id, &len, &flags); p += ret; - if (ret < 0 || id != 2 || + if (ret < 0 || id != 2 || len < 0 || key->keyblob+key->keyblob_len-p < len) { errmsg = "ASN.1 decoding failure"; goto error; @@ -666,7 +677,7 @@ p += len; } -#ifdef DROPBEAR_ECDSA +#if DROPBEAR_ECDSA if (key->type == OSSH_EC) { unsigned char* private_key_bytes = NULL; int private_key_len = 0; @@ -683,7 +694,7 @@ &id, &len, &flags); p += ret; /* id==4 for octet string */ - if (ret < 0 || id != 4 || + if (ret < 0 || id != 4 || len < 0 || key->keyblob+key->keyblob_len-p < len) { errmsg = "ASN.1 decoding failure"; goto error; @@ -697,7 +708,7 @@ &id, &len, &flags); p += ret; /* id==0 */ - if (ret < 0 || id != 0) { + if (ret < 0 || id != 0 || len < 0) { errmsg = "ASN.1 decoding failure"; goto error; } @@ -706,28 +717,28 @@ &id, &len, &flags); p += ret; /* id==6 for object */ - if (ret < 0 || id != 6 || + if (ret < 0 || id != 6 || len < 0 || key->keyblob+key->keyblob_len-p < len) { errmsg = "ASN.1 decoding failure"; goto error; } if (0) {} -#ifdef DROPBEAR_ECC_256 +#if DROPBEAR_ECC_256 else if (len == sizeof(OID_SEC256R1_BLOB) && memcmp(p, OID_SEC256R1_BLOB, len) == 0) { retkey->type = DROPBEAR_SIGNKEY_ECDSA_NISTP256; curve = &ecc_curve_nistp256; } #endif -#ifdef DROPBEAR_ECC_384 +#if DROPBEAR_ECC_384 else if (len == sizeof(OID_SEC384R1_BLOB) && memcmp(p, OID_SEC384R1_BLOB, len) == 0) { retkey->type = DROPBEAR_SIGNKEY_ECDSA_NISTP384; curve = &ecc_curve_nistp384; } #endif -#ifdef DROPBEAR_ECC_521 +#if DROPBEAR_ECC_521 else if (len == sizeof(OID_SEC521R1_BLOB) && memcmp(p, OID_SEC521R1_BLOB, len) == 0) { retkey->type = DROPBEAR_SIGNKEY_ECDSA_NISTP521; @@ -745,7 +756,7 @@ &id, &len, &flags); p += ret; /* id==1 */ - if (ret < 0 || id != 1) { + if (ret < 0 || id != 1 || len < 0) { errmsg = "ASN.1 decoding failure"; goto error; } @@ -754,7 +765,7 @@ &id, &len, &flags); p += ret; /* id==3 for bit string */ - if (ret < 0 || id != 3 || + if (ret < 0 || id != 3 || len < 0 || key->keyblob+key->keyblob_len-p < len) { errmsg = "ASN.1 decoding failure"; goto error; @@ -830,15 +841,15 @@ int ret = 0; FILE *fp; -#ifdef DROPBEAR_RSA +#if DROPBEAR_RSA mp_int dmp1, dmq1, iqmp, tmpval; /* for rsa */ #endif if ( -#ifdef DROPBEAR_RSA +#if DROPBEAR_RSA key->type == DROPBEAR_SIGNKEY_RSA || #endif -#ifdef DROPBEAR_DSS +#if DROPBEAR_DSS key->type == DROPBEAR_SIGNKEY_DSS || #endif 0) @@ -1024,7 +1035,7 @@ } } /* end RSA and DSS handling */ -#ifdef DROPBEAR_ECDSA +#if DROPBEAR_ECDSA if (key->type == DROPBEAR_SIGNKEY_ECDSA_NISTP256 || key->type == DROPBEAR_SIGNKEY_ECDSA_NISTP384 || key->type == DROPBEAR_SIGNKEY_ECDSA_NISTP521) { @@ -1379,7 +1390,7 @@ memset(ret->keyblob, 0, ret->keyblob_size); m_free(ret->keyblob); } - memset(&ret, 0, sizeof(ret)); + memset(ret, 0, sizeof(*ret)); m_free(ret); } return NULL; @@ -1407,11 +1418,12 @@ pos = 8; if (key->keyblob_len < pos+4) goto done; /* key is far too short */ - pos += 4 + GET_32BIT(key->keyblob + pos); /* skip key type */ - if (key->keyblob_len < pos+4) + len = toint(GET_32BIT(key->keyblob + pos)); + if (len < 0 || len > key->keyblob_len - pos - 4) goto done; /* key is far too short */ - len = GET_32BIT(key->keyblob + pos); /* find cipher-type length */ - if (key->keyblob_len < pos+4+len) + pos += 4 + len; /* skip key type */ + len = toint(GET_32BIT(key->keyblob + pos)); /* find cipher-type length */ + if (len < 0 || len > key->keyblob_len - pos - 4) goto done; /* cipher type string is incomplete */ if (len != 4 || 0 != memcmp(key->keyblob + pos + 4, "none", 4)) answer = 1; @@ -1420,15 +1432,14 @@ *comment = dupstr(key->comment); memset(key->keyblob, 0, key->keyblob_size); m_free(key->keyblob); - memset(&key, 0, sizeof(key)); + memset(key, 0, sizeof(*key)); m_free(key); return answer; } static int sshcom_read_mpint(void *data, int len, struct mpint_pos *ret) { - int bits; - int bytes; + unsigned bits, bytes; unsigned char *d = (unsigned char *) data; if (len < 4) @@ -1481,7 +1492,7 @@ struct ssh2_userkey *ret = NULL, *retkey; const struct ssh_signkey *alg; unsigned char *blob = NULL; - int blobsize, publen, privlen; + int blobsize = 0, publen, privlen; if (!key) return NULL; @@ -1601,8 +1612,8 @@ /* * Strip away the containing string to get to the real meat. */ - len = GET_32BIT(ciphertext); - if (len > cipherlen-4) { + len = toint(GET_32BIT(ciphertext)); + if (len < 0 || len > cipherlen-4) { errmsg = "containing string was ill-formed"; goto error; } @@ -1669,7 +1680,8 @@ publen = pos; pos += put_mp(blob+pos, x.start, x.bytes); privlen = pos - publen; - } + } else + return NULL; dropbear_assert(privlen > 0); /* should have bombed by now if not */ @@ -1693,7 +1705,7 @@ } memset(key->keyblob, 0, key->keyblob_size); m_free(key->keyblob); - memset(&key, 0, sizeof(key)); + memset(key, 0, sizeof(*key)); m_free(key); return ret; } @@ -1906,3 +1918,27 @@ return ret; } #endif /* ssh.com stuff disabled */ + +/* From PuTTY misc.c */ +static int toint(unsigned u) +{ + /* + * Convert an unsigned to an int, without running into the + * undefined behaviour which happens by the strict C standard if + * the value overflows. You'd hope that sensible compilers would + * do the sensible thing in response to a cast, but actually I + * don't trust modern compilers not to do silly things like + * assuming that _obviously_ you wouldn't have caused an overflow + * and so they can elide an 'if (i < 0)' test immediately after + * the cast. + * + * Sensible compilers ought of course to optimise this entire + * function into 'just return the input value'! + */ + if (u <= (unsigned)INT_MAX) + return (int)u; + else if (u >= (unsigned)INT_MIN) /* wrap in cast _to_ unsigned is OK */ + return INT_MIN + (int)(u - (unsigned)INT_MIN); + else + return INT_MIN; /* fallback; should never occur on binary machines */ +}
--- a/ltc_prng.c Fri Mar 18 22:47:33 2016 +0800 +++ b/ltc_prng.c Fri Jul 22 00:08:02 2016 +0800 @@ -26,7 +26,7 @@ * in the various other functions. */ -#ifdef DROPBEAR_LTC_PRNG +#if DROPBEAR_LTC_PRNG /** Start the PRNG
--- a/ltc_prng.h Fri Mar 18 22:47:33 2016 +0800 +++ b/ltc_prng.h Fri Jul 22 00:08:02 2016 +0800 @@ -4,7 +4,7 @@ #include "options.h" #include "includes.h" -#ifdef DROPBEAR_LTC_PRNG +#if DROPBEAR_LTC_PRNG extern const struct ltc_prng_descriptor dropbear_prng_desc;
--- a/netio.c Fri Mar 18 22:47:33 2016 +0800 +++ b/netio.c Fri Jul 22 00:08:02 2016 +0800 @@ -53,7 +53,7 @@ struct addrinfo *r; int res = 0; int fastopen = 0; -#ifdef DROPBEAR_CLIENT_TCP_FAST_OPEN +#if DROPBEAR_CLIENT_TCP_FAST_OPEN struct msghdr message; #endif @@ -61,7 +61,7 @@ { dropbear_assert(c->sock == -1); - c->sock = socket(c->res_iter->ai_family, c->res_iter->ai_socktype, c->res_iter->ai_protocol); + c->sock = socket(r->ai_family, r->ai_socktype, r->ai_protocol); if (c->sock < 0) { continue; } @@ -70,7 +70,7 @@ set_sock_nodelay(c->sock); setnonblocking(c->sock); -#ifdef DROPBEAR_CLIENT_TCP_FAST_OPEN +#if DROPBEAR_CLIENT_TCP_FAST_OPEN fastopen = (c->writequeue != NULL); if (fastopen) { @@ -290,7 +290,7 @@ setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, (void*)&val, sizeof(val)); } -#ifdef DROPBEAR_SERVER_TCP_FAST_OPEN +#if DROPBEAR_SERVER_TCP_FAST_OPEN void set_listen_fast_open(int sock) { int qlen = MAX(MAX_UNAUTH_PER_IP, 5); if (setsockopt(sock, SOL_TCP, TCP_FASTOPEN, &qlen, sizeof(qlen)) != 0) {
--- a/netio.h Fri Mar 18 22:47:33 2016 +0800 +++ b/netio.h Fri Jul 22 00:08:02 2016 +0800 @@ -48,7 +48,7 @@ void packet_queue_to_iovec(struct Queue *queue, struct iovec *iov, unsigned int *iov_count); void packet_queue_consume(struct Queue *queue, ssize_t written); -#ifdef DROPBEAR_SERVER_TCP_FAST_OPEN +#if DROPBEAR_SERVER_TCP_FAST_OPEN /* Try for any Linux builds, will fall back if the kernel doesn't support it */ void set_listen_fast_open(int sock); /* Define values which may be supported by the kernel even if the libc is too old */
--- a/options.h Fri Mar 18 22:47:33 2016 +0800 +++ b/options.h Fri Jul 22 00:08:02 2016 +0800 @@ -1,356 +1,19 @@ -/* Dropbear SSH - * Copyright (c) 2002,2003 Matt Johnston - * All rights reserved. See LICENSE for the license. */ - -#ifndef DROPBEAR_OPTIONS_H_ -#define DROPBEAR_OPTIONS_H_ - -/* Define compile-time options below - the "#ifndef DROPBEAR_XXX .... #endif" - * parts are to allow for commandline -DDROPBEAR_XXX options etc. */ - -/* IMPORTANT: Many options will require "make clean" after changes */ +#ifndef DROPBEAR_OPTIONS_H +#define DROPBEAR_OPTIONS_H -#ifndef DROPBEAR_DEFPORT -#define DROPBEAR_DEFPORT "22" -#endif - -#ifndef DROPBEAR_DEFADDRESS -/* Listen on all interfaces */ -#define DROPBEAR_DEFADDRESS "" -#endif +/* +Local compile-time configuration should be defined in localoptions.h +See default_options.h.in for a description of the available options. +*/ -/* Default hostkey paths - these can be specified on the command line */ -#ifndef DSS_PRIV_FILENAME -#define DSS_PRIV_FILENAME "/etc/dropbear/dropbear_dss_host_key" -#endif -#ifndef RSA_PRIV_FILENAME -#define RSA_PRIV_FILENAME "/etc/dropbear/dropbear_rsa_host_key" -#endif -#ifndef ECDSA_PRIV_FILENAME -#define ECDSA_PRIV_FILENAME "/etc/dropbear/dropbear_ecdsa_host_key" +#ifdef LOCALOPTIONS_H_EXISTS +#include "localoptions.h" #endif -/* Set NON_INETD_MODE if you require daemon functionality (ie Dropbear listens - * on chosen ports and keeps accepting connections. This is the default. - * - * Set INETD_MODE if you want to be able to run Dropbear with inetd (or - * similar), where it will use stdin/stdout for connections, and each process - * lasts for a single connection. Dropbear should be invoked with the -i flag - * for inetd, and can only accept IPv4 connections. - * - * Both of these flags can be defined at once, don't compile without at least - * one of them. */ -#define NON_INETD_MODE -#define INETD_MODE - -/* Setting this disables the fast exptmod bignum code. It saves ~5kB, but is - * perhaps 20% slower for pubkey operations (it is probably worth experimenting - * if you want to use this) */ -/*#define NO_FAST_EXPTMOD*/ - -/* Set this if you want to use the DROPBEAR_SMALL_CODE option. This can save -several kB in binary size however will make the symmetrical ciphers and hashes -slower, perhaps by 50%. Recommended for small systems that aren't doing -much traffic. */ -#define DROPBEAR_SMALL_CODE - -/* Enable X11 Forwarding - server only */ -#define ENABLE_X11FWD - -/* Enable TCP Fowarding */ -/* 'Local' is "-L" style (client listening port forwarded via server) - * 'Remote' is "-R" style (server listening port forwarded via client) */ - -#define ENABLE_CLI_LOCALTCPFWD -#define ENABLE_CLI_REMOTETCPFWD - -#define ENABLE_SVR_LOCALTCPFWD -#define ENABLE_SVR_REMOTETCPFWD - -/* Enable Authentication Agent Forwarding */ -#define ENABLE_SVR_AGENTFWD -#define ENABLE_CLI_AGENTFWD - - -/* Note: Both ENABLE_CLI_PROXYCMD and ENABLE_CLI_NETCAT must be set to - * allow multihop dbclient connections */ - -/* Allow using -J <proxycommand> to run the connection through a - pipe to a program, rather the normal TCP connection */ -#define ENABLE_CLI_PROXYCMD - -/* Enable "Netcat mode" option. This will forward standard input/output - * to a remote TCP-forwarded connection */ -#define ENABLE_CLI_NETCAT - -/* Whether to support "-c" and "-m" flags to choose ciphers/MACs at runtime */ -#define ENABLE_USER_ALGO_LIST - -/* Encryption - at least one required. - * Protocol RFC requires 3DES and recommends AES128 for interoperability. - * Including multiple keysize variants the same cipher - * (eg AES256 as well as AES128) will result in a minimal size increase.*/ -#define DROPBEAR_AES128 -#define DROPBEAR_3DES -#define DROPBEAR_AES256 -/* Compiling in Blowfish will add ~6kB to runtime heap memory usage */ -/*#define DROPBEAR_BLOWFISH*/ -#define DROPBEAR_TWOFISH256 -#define DROPBEAR_TWOFISH128 - -/* Enable CBC mode for ciphers. This has security issues though - * is the most compatible with older SSH implementations */ -#define DROPBEAR_ENABLE_CBC_MODE - -/* Enable "Counter Mode" for ciphers. This is more secure than normal - * CBC mode against certain attacks. It is recommended for security - * and forwards compatibility */ -#define DROPBEAR_ENABLE_CTR_MODE - -/* Twofish counter mode is disabled by default because it -has not been tested for interoperability with other SSH implementations. -If you test it please contact the Dropbear author */ -/* #define DROPBEAR_TWOFISH_CTR */ - -/* You can compile with no encryption if you want. In some circumstances - * this could be safe security-wise, though make sure you know what - * you're doing. Anyone can see everything that goes over the wire, so - * the only safe auth method is public key. */ -/* #define DROPBEAR_NONE_CIPHER */ - -/* Message Integrity - at least one required. - * Protocol RFC requires sha1 and recommends sha1-96. - * sha1-96 is of use for slow links as it has a smaller overhead. - * - * There's no reason to disable sha1 or sha1-96 to save space since it's - * used for the random number generator and public-key cryptography anyway. - * Disabling it here will just stop it from being used as the integrity portion - * of the ssh protocol. - * - * These hashes are also used for public key fingerprints in logs. - * If you disable MD5, Dropbear will fall back to SHA1 fingerprints, - * which are not the standard form. */ -#define DROPBEAR_SHA1_HMAC -#define DROPBEAR_SHA1_96_HMAC -#define DROPBEAR_SHA2_256_HMAC -#define DROPBEAR_SHA2_512_HMAC -#define DROPBEAR_MD5_HMAC - -/* You can also disable integrity. Don't bother disabling this if you're - * still using a cipher, it's relatively cheap. If you disable this it's dead - * simple for an attacker to run arbitrary commands on the remote host. Beware. */ -/* #define DROPBEAR_NONE_INTEGRITY */ - -/* Hostkey/public key algorithms - at least one required, these are used - * for hostkey as well as for verifying signatures with pubkey auth. - * Removing either of these won't save very much space. - * SSH2 RFC Draft requires dss, recommends rsa */ -#define DROPBEAR_RSA -#define DROPBEAR_DSS -/* ECDSA is significantly faster than RSA or DSS. Compiling in ECC - * code (either ECDSA or ECDH) increases binary size - around 30kB - * on x86-64 */ -#define DROPBEAR_ECDSA - -/* Generate hostkeys as-needed when the first connection using that key type occurs. - This avoids the need to otherwise run "dropbearkey" and avoids some problems - with badly seeded /dev/urandom when systems first boot. - This also requires a runtime flag "-R". This adds ~4kB to binary size (or hardly - anything if dropbearkey is linked in a "dropbearmulti" binary) */ -#define DROPBEAR_DELAY_HOSTKEY - -/* Enable Curve25519 for key exchange. This is another elliptic - * curve method with good security properties. Increases binary size - * by ~8kB on x86-64 */ -#define DROPBEAR_CURVE25519 - -/* Enable elliptic curve Diffie Hellman key exchange, see note about - * ECDSA above */ -#define DROPBEAR_ECDH - -/* Group14 (2048 bit) is recommended. Group1 is less secure (1024 bit) though - is the only option for interoperability with some older SSH programs */ -#define DROPBEAR_DH_GROUP1 1 -#define DROPBEAR_DH_GROUP14 1 - -/* Control the memory/performance/compression tradeoff for zlib. - * Set windowBits=8 for least memory usage, see your system's - * zlib.h for full details. - * Default settings (windowBits=15) will use 256kB for compression - * windowBits=8 will use 129kB for compression. - * Both modes will use ~35kB for decompression (using windowBits=15 for - * interoperability) */ -#ifndef DROPBEAR_ZLIB_WINDOW_BITS -#define DROPBEAR_ZLIB_WINDOW_BITS 15 -#endif - -/* Server won't allow zlib compression until after authentication. Prevents - flaws in the zlib library being unauthenticated exploitable flaws. - Some old ssh clients may not support the alternative [email protected] method */ -#define DROPBEAR_SERVER_DELAY_ZLIB 1 +#include "default_options.h" -/* Whether to do reverse DNS lookups. */ -/*#define DO_HOST_LOOKUP */ - -/* Whether to print the message of the day (MOTD). This doesn't add much code - * size */ -#define DO_MOTD - -/* The MOTD file path */ -#ifndef MOTD_FILENAME -#define MOTD_FILENAME "/etc/motd" -#endif - -/* Authentication Types - at least one required. - RFC Draft requires pubkey auth, and recommends password */ - -/* Note: PAM auth is quite simple and only works for PAM modules which just do - * a simple "Login: " "Password: " (you can edit the strings in svr-authpam.c). - * It's useful for systems like OS X where standard password crypts don't work - * but there's an interface via a PAM module. It won't work for more complex - * PAM challenge/response. - * You can't enable both PASSWORD and PAM. */ - -/* This requires crypt() */ -#ifdef HAVE_CRYPT -#define ENABLE_SVR_PASSWORD_AUTH -#endif -/* PAM requires ./configure --enable-pam */ -/*#define ENABLE_SVR_PAM_AUTH */ -#define ENABLE_SVR_PUBKEY_AUTH - -/* Whether to take public key options in - * authorized_keys file into account */ -#ifdef ENABLE_SVR_PUBKEY_AUTH -#define ENABLE_SVR_PUBKEY_OPTIONS -#endif - -/* This requires getpass. */ -#ifdef HAVE_GETPASS -#define ENABLE_CLI_PASSWORD_AUTH -#define ENABLE_CLI_INTERACT_AUTH -#endif -#define ENABLE_CLI_PUBKEY_AUTH - -/* A default argument for dbclient -i <privatekey>. -Homedir is prepended unless path begins with / */ -#define DROPBEAR_DEFAULT_CLI_AUTHKEY ".ssh/id_dropbear" - -/* This variable can be used to set a password for client - * authentication on the commandline. Beware of platforms - * that don't protect environment variables of processes etc. Also - * note that it will be provided for all "hidden" client-interactive - * style prompts - if you want something more sophisticated, use - * SSH_ASKPASS instead. Comment out this var to remove this functionality.*/ -#define DROPBEAR_PASSWORD_ENV "DROPBEAR_PASSWORD" - -/* Define this (as well as ENABLE_CLI_PASSWORD_AUTH) to allow the use of - * a helper program for the ssh client. The helper program should be - * specified in the SSH_ASKPASS environment variable, and dbclient - * should be run with DISPLAY set and no tty. The program should - * return the password on standard output */ -/*#define ENABLE_CLI_ASKPASS_HELPER*/ - -/* Save a network roundtrip by sendng a real auth request immediately after - * sending a query for the available methods. It is at the expense of < 100 - * bytes of extra network traffic. This is not yet enabled by default since it - * could cause problems with non-compliant servers */ -/* #define DROPBEAR_CLI_IMMEDIATE_AUTH */ - -/* Source for randomness. This must be able to provide hundreds of bytes per SSH - * connection without blocking. In addition /dev/random is used for seeding - * rsa/dss key generation */ -#define DROPBEAR_URANDOM_DEV "/dev/urandom" - -/* Set this to use PRNGD or EGD instead of /dev/urandom or /dev/random */ -/*#define DROPBEAR_PRNGD_SOCKET "/var/run/dropbear-rng"*/ - - -/* Specify the number of clients we will allow to be connected but - * not yet authenticated. After this limit, connections are rejected */ -/* The first setting is per-IP, to avoid denial of service */ -#ifndef MAX_UNAUTH_PER_IP -#define MAX_UNAUTH_PER_IP 5 -#endif - -/* And then a global limit to avoid chewing memory if connections - * come from many IPs */ -#ifndef MAX_UNAUTH_CLIENTS -#define MAX_UNAUTH_CLIENTS 30 -#endif - -/* Maximum number of failed authentication tries (server option) */ -#ifndef MAX_AUTH_TRIES -#define MAX_AUTH_TRIES 10 -#endif - -/* The default file to store the daemon's process ID, for shutdown - scripts etc. This can be overridden with the -P flag */ -#ifndef DROPBEAR_PIDFILE -#define DROPBEAR_PIDFILE "/var/run/dropbear.pid" -#endif - -/* The command to invoke for xauth when using X11 forwarding. - * "-q" for quiet */ -#ifndef XAUTH_COMMAND -#define XAUTH_COMMAND "/usr/bin/xauth -q" -#endif - -/* if you want to enable running an sftp server (such as the one included with - * OpenSSH), set the path below. If the path isn't defined, sftp will not - * be enabled */ -#ifndef SFTPSERVER_PATH -#define SFTPSERVER_PATH "/usr/libexec/sftp-server" -#endif - -/* This is used by the scp binary when used as a client binary. If you're - * not using the Dropbear client, you'll need to change it */ -#define DROPBEAR_PATH_SSH_PROGRAM "/usr/bin/dbclient" - -/* Whether to log commands executed by a client. This only logs the - * (single) command sent to the server, not what a user did in a - * shell/sftp session etc. */ -/* #define LOG_COMMANDS */ - -/* Window size limits. These tend to be a trade-off between memory - usage and network performance: */ -/* Size of the network receive window. This amount of memory is allocated - as a per-channel receive buffer. Increasing this value can make a - significant difference to network performance. 24kB was empirically - chosen for a 100mbit ethernet network. The value can be altered at - runtime with the -W argument. */ -#ifndef DEFAULT_RECV_WINDOW -#define DEFAULT_RECV_WINDOW 24576 -#endif -/* Maximum size of a received SSH data packet - this _MUST_ be >= 32768 - in order to interoperate with other implementations */ -#ifndef RECV_MAX_PAYLOAD_LEN -#define RECV_MAX_PAYLOAD_LEN 32768 -#endif -/* Maximum size of a transmitted data packet - this can be any value, - though increasing it may not make a significant difference. */ -#ifndef TRANS_MAX_PAYLOAD_LEN -#define TRANS_MAX_PAYLOAD_LEN 16384 -#endif - -/* Ensure that data is transmitted every KEEPALIVE seconds. This can -be overridden at runtime with -K. 0 disables keepalives */ -#define DEFAULT_KEEPALIVE 0 - -/* If this many KEEPALIVES are sent with no packets received from the -other side, exit. Not run-time configurable - if you have a need -for runtime configuration please mail the Dropbear list */ -#define DEFAULT_KEEPALIVE_LIMIT 3 - -/* Ensure that data is received within IDLE_TIMEOUT seconds. This can -be overridden at runtime with -I. 0 disables idle timeouts */ -#define DEFAULT_IDLE_TIMEOUT 0 - -/* The default path. This will often get replaced by the shell */ -#define DEFAULT_PATH "/usr/bin:/bin" - -/* Some other defines (that mostly should be left alone) are defined +/* Some other defines that mostly should be left alone are defined * in sysoptions.h */ #include "sysoptions.h" -#endif /* DROPBEAR_OPTIONS_H_ */ +#endif /* DROPBEAR_OPTIONS_H */
--- a/rsa.c Fri Mar 18 22:47:33 2016 +0800 +++ b/rsa.c Fri Jul 22 00:08:02 2016 +0800 @@ -36,7 +36,7 @@ #include "ssh.h" #include "dbrandom.h" -#ifdef DROPBEAR_RSA +#if DROPBEAR_RSA static void rsa_pad_em(dropbear_rsa_key * key, buffer *data_buf, mp_int * rsa_em); @@ -204,7 +204,7 @@ } -#ifdef DROPBEAR_SIGNKEY_VERIFY +#if DROPBEAR_SIGNKEY_VERIFY /* Verify a signature in buf, made on data by the key given. * Returns DROPBEAR_SUCCESS or DROPBEAR_FAILURE */ int buf_rsa_verify(buffer * buf, dropbear_rsa_key *key, buffer *data_buf) { @@ -279,7 +279,7 @@ /* the actual signing of the padded data */ -#ifdef RSA_BLINDING +#if DROPBEAR_RSA_BLINDING /* With blinding, s = (r^(-1))((em)*r^e)^d mod n */ @@ -322,7 +322,7 @@ dropbear_exit("RSA error"); } -#endif /* RSA_BLINDING */ +#endif /* DROPBEAR_RSA_BLINDING */ mp_clear_multi(&rsa_tmp1, &rsa_tmp2, &rsa_tmp3, NULL);
--- a/rsa.h Fri Mar 18 22:47:33 2016 +0800 +++ b/rsa.h Fri Jul 22 00:08:02 2016 +0800 @@ -28,7 +28,7 @@ #include "includes.h" #include "buffer.h" -#ifdef DROPBEAR_RSA +#if DROPBEAR_RSA #define RSA_SIGNATURE_SIZE (4+7+4+40) @@ -44,7 +44,7 @@ } dropbear_rsa_key; void buf_put_rsa_sign(buffer* buf, dropbear_rsa_key *key, buffer *data_buf); -#ifdef DROPBEAR_SIGNKEY_VERIFY +#if DROPBEAR_SIGNKEY_VERIFY int buf_rsa_verify(buffer * buf, dropbear_rsa_key *key, buffer *data_buf); #endif int buf_get_rsa_pub_key(buffer* buf, dropbear_rsa_key *key);
--- a/runopts.h Fri Mar 18 22:47:33 2016 +0800 +++ b/runopts.h Fri Jul 22 00:08:02 2016 +0800 @@ -33,8 +33,8 @@ typedef struct runopts { -#if defined(ENABLE_SVR_REMOTETCPFWD) || defined(ENABLE_CLI_LOCALTCPFWD) \ - || defined(ENABLE_CLI_REMOTETCPFWD) +#if DROPBEAR_SVR_REMOTETCPFWD || DROPBEAR_CLI_LOCALTCPFWD \ + || DROPBEAR_CLI_REMOTETCPFWD int listen_fwd_all; #endif unsigned int recv_window; @@ -53,7 +53,7 @@ } compress_mode; #endif -#ifdef ENABLE_USER_ALGO_LIST +#if DROPBEAR_USER_ALGO_LIST char *cipher_list; char *mac_list; #endif @@ -97,10 +97,10 @@ int norootpass; int allowblankpass; -#ifdef ENABLE_SVR_REMOTETCPFWD +#if DROPBEAR_SVR_REMOTETCPFWD int noremotetcp; #endif -#ifdef ENABLE_SVR_LOCALTCPFWD +#if DROPBEAR_SVR_LOCALTCPFWD int nolocaltcp; #endif @@ -114,6 +114,8 @@ buffer * banner; char * pidfile; + char * forced_command; + } svr_runopts; extern svr_runopts svr_opts; @@ -137,19 +139,19 @@ int no_cmd; int backgrounded; int is_subsystem; -#ifdef ENABLE_CLI_PUBKEY_AUTH +#if DROPBEAR_CLI_PUBKEY_AUTH m_list *privkeys; /* Keys to use for public-key auth */ #endif -#ifdef ENABLE_CLI_ANYTCPFWD +#if DROPBEAR_CLI_ANYTCPFWD int exit_on_fwd_failure; #endif -#ifdef ENABLE_CLI_REMOTETCPFWD +#if DROPBEAR_CLI_REMOTETCPFWD m_list * remotefwds; #endif -#ifdef ENABLE_CLI_LOCALTCPFWD +#if DROPBEAR_CLI_LOCALTCPFWD m_list * localfwds; #endif -#ifdef ENABLE_CLI_AGENTFWD +#if DROPBEAR_CLI_AGENTFWD int agent_fwd; int agent_keys_loaded; /* whether pubkeys has been populated with a list of keys held by the agent */ @@ -157,11 +159,11 @@ agent sessions have their own file descriptors */ #endif -#ifdef ENABLE_CLI_NETCAT +#if DROPBEAR_CLI_NETCAT char *netcat_host; unsigned int netcat_port; #endif -#ifdef ENABLE_CLI_PROXYCMD +#if DROPBEAR_CLI_PROXYCMD char *proxycmd; #endif } cli_runopts; @@ -169,7 +171,7 @@ extern cli_runopts cli_opts; void cli_getopts(int argc, char ** argv); -#ifdef ENABLE_USER_ALGO_LIST +#if DROPBEAR_USER_ALGO_LIST void parse_ciphers_macs(void); #endif
--- a/scp.c Fri Mar 18 22:47:33 2016 +0800 +++ b/scp.c Fri Jul 22 00:08:02 2016 +0800 @@ -133,7 +133,7 @@ fprintf(stderr, " %s", a->list[i]); fprintf(stderr, "\n"); } -#ifdef USE_VFORK +#if DROPBEAR_VFORK pid = vfork(); #else pid = fork(); @@ -144,7 +144,7 @@ if (pid == 0) { execvp(a->list[0], a->list); perror(a->list[0]); -#ifdef USE_VFORK +#if DROPBEAR_VFORK _exit(1); #else exit(1); @@ -213,12 +213,12 @@ /* uClinux needs to build the args here before vforking, otherwise we do it later on. */ -#ifdef USE_VFORK +#if DROPBEAR_VFORK arg_setup(host, remuser, cmd); #endif /* Fork a child to execute the command on the remote host using ssh. */ -#ifdef USE_VFORK +#if DROPBEAR_VFORK do_cmd_pid = vfork(); #else do_cmd_pid = fork(); @@ -233,13 +233,13 @@ close(pin[0]); close(pout[1]); -#ifndef USE_VFORK +#if !DROPBEAR_VFORK arg_setup(host, remuser, cmd); #endif execvp(ssh_program, args.list); perror(ssh_program); -#ifdef USE_VFORK +#if DROPBEAR_VFORK _exit(1); #else exit(1); @@ -248,7 +248,7 @@ fatal("fork: %s", strerror(errno)); } -#ifdef USE_VFORK +#if DROPBEAR_VFORK /* clean up command */ /* pop cmd */ xfree(args.list[args.num-1]); @@ -304,8 +304,8 @@ void toremote(char *, int, char *[]); void usage(void); -#if defined(DBMULTI_scp) || !defined(DROPBEAR_MULTI) -#if defined(DBMULTI_scp) && defined(DROPBEAR_MULTI) +#if defined(DBMULTI_scp) || !DROPBEAR_MULTI +#if defined(DBMULTI_scp) && DROPBEAR_MULTI int scp_main(int argc, char **argv) #else int
--- a/session.h Fri Mar 18 22:47:33 2016 +0800 +++ b/session.h Fri Jul 22 00:08:02 2016 +0800 @@ -79,7 +79,7 @@ /* actual keys */ union { symmetric_CBC cbc; -#ifdef DROPBEAR_ENABLE_CTR_MODE +#if DROPBEAR_ENABLE_CTR_MODE symmetric_CTR ctr; #endif } cipher_state; @@ -237,7 +237,7 @@ /* The resolved remote address, used for lastlog etc */ char *remotehost; -#ifdef USE_VFORK +#if DROPBEAR_VFORK pid_t server_pid; #endif @@ -288,7 +288,7 @@ int lastauthtype; /* either AUTH_TYPE_PUBKEY or AUTH_TYPE_PASSWORD, for the last type of auth we tried */ int ignore_next_auth_response; -#ifdef ENABLE_CLI_INTERACT_AUTH +#if DROPBEAR_CLI_INTERACT_AUTH int auth_interact_failed; /* flag whether interactive auth can still be used */ int interact_request_received; /* flag whether we've received an @@ -311,11 +311,11 @@ /* Global structs storing the state */ extern struct sshsession ses; -#ifdef DROPBEAR_SERVER +#if DROPBEAR_SERVER extern struct serversession svr_ses; #endif /* DROPBEAR_SERVER */ -#ifdef DROPBEAR_CLIENT +#if DROPBEAR_CLIENT extern struct clientsession cli_ses; #endif /* DROPBEAR_CLIENT */
--- a/signkey.c Fri Mar 18 22:47:33 2016 +0800 +++ b/signkey.c Fri Jul 22 00:08:02 2016 +0800 @@ -30,13 +30,13 @@ #include "ecdsa.h" static const char * const signkey_names[DROPBEAR_SIGNKEY_NUM_NAMED] = { -#ifdef DROPBEAR_RSA +#if DROPBEAR_RSA "ssh-rsa", #endif -#ifdef DROPBEAR_DSS +#if DROPBEAR_DSS "ssh-dss", #endif -#ifdef DROPBEAR_ECDSA +#if DROPBEAR_ECDSA "ecdsa-sha2-nistp256", "ecdsa-sha2-nistp384", "ecdsa-sha2-nistp521" @@ -75,7 +75,7 @@ if (namelen == strlen(fixed_name) && memcmp(fixed_name, name, namelen) == 0) { -#ifdef DROPBEAR_ECDSA +#if DROPBEAR_ECDSA /* Some of the ECDSA key sizes are defined even if they're not compiled in */ if (0 #ifndef DROPBEAR_ECC_256 @@ -106,25 +106,25 @@ void ** signkey_key_ptr(sign_key *key, enum signkey_type type) { switch (type) { -#ifdef DROPBEAR_ECDSA -#ifdef DROPBEAR_ECC_256 +#if DROPBEAR_ECDSA +#if DROPBEAR_ECC_256 case DROPBEAR_SIGNKEY_ECDSA_NISTP256: return (void**)&key->ecckey256; #endif -#ifdef DROPBEAR_ECC_384 +#if DROPBEAR_ECC_384 case DROPBEAR_SIGNKEY_ECDSA_NISTP384: return (void**)&key->ecckey384; #endif -#ifdef DROPBEAR_ECC_521 +#if DROPBEAR_ECC_521 case DROPBEAR_SIGNKEY_ECDSA_NISTP521: return (void**)&key->ecckey521; #endif #endif /* DROPBEAR_ECDSA */ -#ifdef DROPBEAR_RSA +#if DROPBEAR_RSA case DROPBEAR_SIGNKEY_RSA: return (void**)&key->rsakey; #endif -#ifdef DROPBEAR_DSS +#if DROPBEAR_DSS case DROPBEAR_SIGNKEY_DSS: return (void**)&key->dsskey; #endif @@ -161,7 +161,7 @@ /* Rewind the buffer back before "ssh-rsa" etc */ buf_incrpos(buf, -len - 4); -#ifdef DROPBEAR_DSS +#if DROPBEAR_DSS if (keytype == DROPBEAR_SIGNKEY_DSS) { dss_key_free(key->dsskey); key->dsskey = m_malloc(sizeof(*key->dsskey)); @@ -171,7 +171,7 @@ } } #endif -#ifdef DROPBEAR_RSA +#if DROPBEAR_RSA if (keytype == DROPBEAR_SIGNKEY_RSA) { rsa_key_free(key->rsakey); key->rsakey = m_malloc(sizeof(*key->rsakey)); @@ -181,7 +181,7 @@ } } #endif -#ifdef DROPBEAR_ECDSA +#if DROPBEAR_ECDSA if (signkey_is_ecdsa(keytype)) { ecc_key **eck = (ecc_key**)signkey_key_ptr(key, keytype); if (eck) { @@ -230,7 +230,7 @@ /* Rewind the buffer back before "ssh-rsa" etc */ buf_incrpos(buf, -len - 4); -#ifdef DROPBEAR_DSS +#if DROPBEAR_DSS if (keytype == DROPBEAR_SIGNKEY_DSS) { dss_key_free(key->dsskey); key->dsskey = m_malloc(sizeof(*key->dsskey)); @@ -240,7 +240,7 @@ } } #endif -#ifdef DROPBEAR_RSA +#if DROPBEAR_RSA if (keytype == DROPBEAR_SIGNKEY_RSA) { rsa_key_free(key->rsakey); key->rsakey = m_malloc(sizeof(*key->rsakey)); @@ -250,7 +250,7 @@ } } #endif -#ifdef DROPBEAR_ECDSA +#if DROPBEAR_ECDSA if (signkey_is_ecdsa(keytype)) { ecc_key **eck = (ecc_key**)signkey_key_ptr(key, keytype); if (eck) { @@ -281,17 +281,17 @@ TRACE2(("enter buf_put_pub_key")) pubkeys = buf_new(MAX_PUBKEY_SIZE); -#ifdef DROPBEAR_DSS +#if DROPBEAR_DSS if (type == DROPBEAR_SIGNKEY_DSS) { buf_put_dss_pub_key(pubkeys, key->dsskey); } #endif -#ifdef DROPBEAR_RSA +#if DROPBEAR_RSA if (type == DROPBEAR_SIGNKEY_RSA) { buf_put_rsa_pub_key(pubkeys, key->rsakey); } #endif -#ifdef DROPBEAR_ECDSA +#if DROPBEAR_ECDSA if (signkey_is_ecdsa(type)) { ecc_key **eck = (ecc_key**)signkey_key_ptr(key, type); if (eck) { @@ -314,21 +314,21 @@ TRACE(("enter buf_put_priv_key")) TRACE(("type is %d", type)) -#ifdef DROPBEAR_DSS +#if DROPBEAR_DSS if (type == DROPBEAR_SIGNKEY_DSS) { buf_put_dss_priv_key(buf, key->dsskey); TRACE(("leave buf_put_priv_key: dss done")) return; } #endif -#ifdef DROPBEAR_RSA +#if DROPBEAR_RSA if (type == DROPBEAR_SIGNKEY_RSA) { buf_put_rsa_priv_key(buf, key->rsakey); TRACE(("leave buf_put_priv_key: rsa done")) return; } #endif -#ifdef DROPBEAR_ECDSA +#if DROPBEAR_ECDSA if (signkey_is_ecdsa(type)) { ecc_key **eck = (ecc_key**)signkey_key_ptr(key, type); if (eck) { @@ -345,30 +345,30 @@ TRACE2(("enter sign_key_free")) -#ifdef DROPBEAR_DSS +#if DROPBEAR_DSS dss_key_free(key->dsskey); key->dsskey = NULL; #endif -#ifdef DROPBEAR_RSA +#if DROPBEAR_RSA rsa_key_free(key->rsakey); key->rsakey = NULL; #endif -#ifdef DROPBEAR_ECDSA -#ifdef DROPBEAR_ECC_256 +#if DROPBEAR_ECDSA +#if DROPBEAR_ECC_256 if (key->ecckey256) { ecc_free(key->ecckey256); m_free(key->ecckey256); key->ecckey256 = NULL; } #endif -#ifdef DROPBEAR_ECC_384 +#if DROPBEAR_ECC_384 if (key->ecckey384) { ecc_free(key->ecckey384); m_free(key->ecckey384); key->ecckey384 = NULL; } #endif -#ifdef DROPBEAR_ECC_521 +#if DROPBEAR_ECC_521 if (key->ecckey521) { ecc_free(key->ecckey521); m_free(key->ecckey521); @@ -395,7 +395,7 @@ /* Since we're not sure if we'll have md5 or sha1, we present both. * MD5 is used in preference, but sha1 could still be useful */ -#ifdef DROPBEAR_MD5_HMAC +#if DROPBEAR_MD5_HMAC static char * sign_key_md5_fingerprint(unsigned char* keyblob, unsigned int keybloblen) { @@ -470,7 +470,7 @@ * in either sha1 or md5 */ char * sign_key_fingerprint(unsigned char* keyblob, unsigned int keybloblen) { -#ifdef DROPBEAR_MD5_HMAC +#if DROPBEAR_MD5_HMAC return sign_key_md5_fingerprint(keyblob, keybloblen); #else return sign_key_sha1_fingerprint(keyblob, keybloblen); @@ -482,17 +482,17 @@ buffer *sigblob; sigblob = buf_new(MAX_PUBKEY_SIZE); -#ifdef DROPBEAR_DSS +#if DROPBEAR_DSS if (type == DROPBEAR_SIGNKEY_DSS) { buf_put_dss_sign(sigblob, key->dsskey, data_buf); } #endif -#ifdef DROPBEAR_RSA +#if DROPBEAR_RSA if (type == DROPBEAR_SIGNKEY_RSA) { buf_put_rsa_sign(sigblob, key->rsakey, data_buf); } #endif -#ifdef DROPBEAR_ECDSA +#if DROPBEAR_ECDSA if (signkey_is_ecdsa(type)) { ecc_key **eck = (ecc_key**)signkey_key_ptr(key, type); if (eck) { @@ -508,7 +508,7 @@ } -#ifdef DROPBEAR_SIGNKEY_VERIFY +#if DROPBEAR_SIGNKEY_VERIFY /* Return DROPBEAR_SUCCESS or DROPBEAR_FAILURE. * If FAILURE is returned, the position of * buf is undefined. If SUCCESS is returned, buf will be positioned after the @@ -526,7 +526,7 @@ type = signkey_type_from_name(type_name, type_name_len); m_free(type_name); -#ifdef DROPBEAR_DSS +#if DROPBEAR_DSS if (type == DROPBEAR_SIGNKEY_DSS) { if (key->dsskey == NULL) { dropbear_exit("No DSS key to verify signature"); @@ -535,7 +535,7 @@ } #endif -#ifdef DROPBEAR_RSA +#if DROPBEAR_RSA if (type == DROPBEAR_SIGNKEY_RSA) { if (key->rsakey == NULL) { dropbear_exit("No RSA key to verify signature"); @@ -543,7 +543,7 @@ return buf_rsa_verify(buf, key->rsakey, data_buf); } #endif -#ifdef DROPBEAR_ECDSA +#if DROPBEAR_ECDSA if (signkey_is_ecdsa(type)) { ecc_key **eck = (ecc_key**)signkey_key_ptr(key, type); if (eck) { @@ -557,7 +557,7 @@ } #endif /* DROPBEAR_SIGNKEY_VERIFY */ -#ifdef DROPBEAR_KEY_LINES /* ie we're using authorized_keys or known_hosts */ +#if DROPBEAR_KEY_LINES /* ie we're using authorized_keys or known_hosts */ /* Returns DROPBEAR_SUCCESS or DROPBEAR_FAILURE when given a buffer containing * a key, a key, and a type. The buffer is positioned at the start of the
--- a/signkey.h Fri Mar 18 22:47:33 2016 +0800 +++ b/signkey.h Fri Jul 22 00:08:02 2016 +0800 @@ -30,13 +30,13 @@ #include "rsa.h" enum signkey_type { -#ifdef DROPBEAR_RSA +#if DROPBEAR_RSA DROPBEAR_SIGNKEY_RSA, #endif -#ifdef DROPBEAR_DSS +#if DROPBEAR_DSS DROPBEAR_SIGNKEY_DSS, #endif -#ifdef DROPBEAR_ECDSA +#if DROPBEAR_ECDSA DROPBEAR_SIGNKEY_ECDSA_NISTP256, DROPBEAR_SIGNKEY_ECDSA_NISTP384, DROPBEAR_SIGNKEY_ECDSA_NISTP521, @@ -61,20 +61,20 @@ signkey_source source; char *filename; -#ifdef DROPBEAR_DSS +#if DROPBEAR_DSS dropbear_dss_key * dsskey; #endif -#ifdef DROPBEAR_RSA +#if DROPBEAR_RSA dropbear_rsa_key * rsakey; #endif -#ifdef DROPBEAR_ECDSA -#ifdef DROPBEAR_ECC_256 +#if DROPBEAR_ECDSA +#if DROPBEAR_ECC_256 ecc_key * ecckey256; #endif -#ifdef DROPBEAR_ECC_384 +#if DROPBEAR_ECC_384 ecc_key * ecckey384; #endif -#ifdef DROPBEAR_ECC_521 +#if DROPBEAR_ECC_521 ecc_key * ecckey521; #endif #endif @@ -91,7 +91,7 @@ void buf_put_priv_key(buffer* buf, sign_key *key, enum signkey_type type); void sign_key_free(sign_key *key); void buf_put_sign(buffer* buf, sign_key *key, enum signkey_type type, buffer *data_buf); -#ifdef DROPBEAR_SIGNKEY_VERIFY +#if DROPBEAR_SIGNKEY_VERIFY int buf_verify(buffer * buf, sign_key *key, buffer *data_buf); char * sign_key_fingerprint(unsigned char* keyblob, unsigned int keybloblen); #endif
--- a/svr-agentfwd.c Fri Mar 18 22:47:33 2016 +0800 +++ b/svr-agentfwd.c Fri Jul 22 00:08:02 2016 +0800 @@ -27,7 +27,7 @@ #include "includes.h" -#ifdef ENABLE_SVR_AGENTFWD +#if DROPBEAR_SVR_AGENTFWD #include "agentfwd.h" #include "session.h"
--- a/svr-auth.c Fri Mar 18 22:47:33 2016 +0800 +++ b/svr-auth.c Fri Jul 22 00:08:02 2016 +0800 @@ -56,10 +56,10 @@ static void authclear() { memset(&ses.authstate, 0, sizeof(ses.authstate)); -#ifdef ENABLE_SVR_PUBKEY_AUTH +#if DROPBEAR_SVR_PUBKEY_AUTH ses.authstate.authtypes |= AUTH_TYPE_PUBKEY; #endif -#if defined(ENABLE_SVR_PASSWORD_AUTH) || defined(ENABLE_SVR_PAM_AUTH) +#if DROPBEAR_SVR_PASSWORD_AUTH || DROPBEAR_SVR_PAM_AUTH if (!svr_opts.noauthpass) { ses.authstate.authtypes |= AUTH_TYPE_PASSWORD; } @@ -169,7 +169,7 @@ } } -#ifdef ENABLE_SVR_PASSWORD_AUTH +#if DROPBEAR_SVR_PASSWORD_AUTH if (!svr_opts.noauthpass && !(svr_opts.norootpass && ses.authstate.pw_uid == 0) ) { /* user wants to try password auth */ @@ -184,7 +184,7 @@ } #endif -#ifdef ENABLE_SVR_PAM_AUTH +#if DROPBEAR_SVR_PAM_AUTH if (!svr_opts.noauthpass && !(svr_opts.norootpass && ses.authstate.pw_uid == 0) ) { /* user wants to try password auth */ @@ -199,7 +199,7 @@ } #endif -#ifdef ENABLE_SVR_PUBKEY_AUTH +#if DROPBEAR_SVR_PUBKEY_AUTH /* user wants to try pubkey auth */ if (methodlen == AUTH_METHOD_PUBKEY_LEN && strncmp(methodname, AUTH_METHOD_PUBKEY,
--- a/svr-authpam.c Fri Mar 18 22:47:33 2016 +0800 +++ b/svr-authpam.c Fri Jul 22 00:08:02 2016 +0800 @@ -31,7 +31,7 @@ #include "dbutil.h" #include "auth.h" -#ifdef ENABLE_SVR_PAM_AUTH +#if DROPBEAR_SVR_PAM_AUTH #if defined(HAVE_SECURITY_PAM_APPL_H) #include <security/pam_appl.h> @@ -270,4 +270,4 @@ } } -#endif /* ENABLE_SVR_PAM_AUTH */ +#endif /* DROPBEAR_SVR_PAM_AUTH */
--- a/svr-authpasswd.c Fri Mar 18 22:47:33 2016 +0800 +++ b/svr-authpasswd.c Fri Jul 22 00:08:02 2016 +0800 @@ -31,7 +31,7 @@ #include "auth.h" #include "runopts.h" -#ifdef ENABLE_SVR_PASSWORD_AUTH +#if DROPBEAR_SVR_PASSWORD_AUTH /* not constant time when strings are differing lengths. string content isn't leaked, and crypt hashes are predictable length. */
--- a/svr-authpubkey.c Fri Mar 18 22:47:33 2016 +0800 +++ b/svr-authpubkey.c Fri Jul 22 00:08:02 2016 +0800 @@ -65,7 +65,7 @@ #include "packet.h" #include "algo.h" -#ifdef ENABLE_SVR_PUBKEY_AUTH +#if DROPBEAR_SVR_PUBKEY_AUTH #define MIN_AUTHKEYS_LINE 10 /* "ssh-rsa AB" - short but doesn't matter */ #define MAX_AUTHKEYS_LINE 4200 /* max length of a line in authkeys */
--- a/svr-authpubkeyoptions.c Fri Mar 18 22:47:33 2016 +0800 +++ b/svr-authpubkeyoptions.c Fri Jul 22 00:08:02 2016 +0800 @@ -47,7 +47,7 @@ #include "signkey.h" #include "auth.h" -#ifdef ENABLE_SVR_PUBKEY_OPTIONS +#if DROPBEAR_SVR_PUBKEY_OPTIONS_BUILT /* Returns 1 if pubkey allows agent forwarding, * 0 otherwise */ @@ -143,14 +143,14 @@ ses.authstate.pubkey_options->no_port_forwarding_flag = 1; goto next_option; } -#ifdef ENABLE_SVR_AGENTFWD +#if DROPBEAR_SVR_AGENTFWD if (match_option(options_buf, "no-agent-forwarding") == DROPBEAR_SUCCESS) { dropbear_log(LOG_WARNING, "Agent forwarding disabled."); ses.authstate.pubkey_options->no_agent_forwarding_flag = 1; goto next_option; } #endif -#ifdef ENABLE_X11FWD +#if DROPBEAR_X11FWD if (match_option(options_buf, "no-X11-forwarding") == DROPBEAR_SUCCESS) { dropbear_log(LOG_WARNING, "X11 forwarding disabled."); ses.authstate.pubkey_options->no_x11_forwarding_flag = 1;
--- a/svr-chansession.c Fri Mar 18 22:47:33 2016 +0800 +++ b/svr-chansession.c Fri Jul 22 00:08:02 2016 +0800 @@ -254,13 +254,13 @@ channel->typedata = chansess; -#ifndef DISABLE_X11FWD +#if DROPBEAR_X11FWD chansess->x11listener = NULL; chansess->x11authprot = NULL; chansess->x11authcookie = NULL; #endif -#ifdef ENABLE_SVR_AGENTFWD +#if DROPBEAR_SVR_AGENTFWD chansess->agentlistener = NULL; chansess->agentfile = NULL; chansess->agentdir = NULL; @@ -301,7 +301,7 @@ m_free(chansess->cmd); m_free(chansess->term); -#ifdef ENABLE_SVR_PUBKEY_OPTIONS +#if DROPBEAR_SVR_PUBKEY_OPTIONS_BUILT m_free(chansess->original_command); #endif @@ -315,11 +315,11 @@ m_free(chansess->tty); } -#ifndef DISABLE_X11FWD +#if DROPBEAR_X11FWD x11cleanup(chansess); #endif -#ifdef ENABLE_SVR_AGENTFWD +#if DROPBEAR_SVR_AGENTFWD svr_agentcleanup(chansess); #endif @@ -373,11 +373,11 @@ ret = sessioncommand(channel, chansess, 1, 0); } else if (strcmp(type, "subsystem") == 0) { ret = sessioncommand(channel, chansess, 1, 1); -#ifndef DISABLE_X11FWD +#if DROPBEAR_X11FWD } else if (strcmp(type, "x11-req") == 0) { ret = x11req(chansess); #endif -#ifdef ENABLE_SVR_AGENTFWD +#if DROPBEAR_SVR_AGENTFWD } else if (strcmp(type, "[email protected]") == 0) { ret = svr_agentreq(chansess); #endif @@ -603,7 +603,7 @@ return DROPBEAR_SUCCESS; } -#ifndef USE_VFORK +#if !DROPBEAR_VFORK static void make_connection_string(struct ChanSess *chansess) { char *local_ip, *local_port, *remote_ip, *remote_port; size_t len; @@ -671,8 +671,16 @@ } } - /* take public key option 'command' into account */ - svr_pubkey_set_forced_command(chansess); + + /* take global command into account */ + if (svr_opts.forced_command) { + chansess->original_command = chansess->cmd ? : m_strdup(""); + chansess->cmd = m_strdup(svr_opts.forced_command); + } else { + /* take public key option 'command' into account */ + svr_pubkey_set_forced_command(chansess); + } + #ifdef LOG_COMMANDS if (chansess->cmd) { @@ -686,7 +694,7 @@ /* uClinux will vfork(), so there'll be a race as connection_string is freed below. */ -#ifndef USE_VFORK +#if !DROPBEAR_VFORK make_connection_string(chansess); #endif @@ -702,7 +710,7 @@ ret = ptycommand(channel, chansess); } -#ifndef USE_VFORK +#if !DROPBEAR_VFORK m_free(chansess->connection_string); m_free(chansess->client_string); #endif @@ -776,7 +784,7 @@ return DROPBEAR_FAILURE; } -#ifdef USE_VFORK +#if DROPBEAR_VFORK pid = vfork(); #else pid = fork(); @@ -896,7 +904,7 @@ /* with uClinux we'll have vfork()ed, so don't want to overwrite the * hostkey. can't think of a workaround to clear it */ -#ifndef USE_VFORK +#if !DROPBEAR_VFORK /* wipe the hostkey */ sign_key_free(svr_opts.hostkey); svr_opts.hostkey = NULL; @@ -965,7 +973,7 @@ addnewvar("SSH_CLIENT", chansess->client_string); } -#ifdef ENABLE_SVR_PUBKEY_OPTIONS +#if DROPBEAR_SVR_PUBKEY_OPTIONS_BUILT if (chansess->original_command) { addnewvar("SSH_ORIGINAL_COMMAND", chansess->original_command); } @@ -976,11 +984,11 @@ dropbear_exit("Error changing directory"); } -#ifndef DISABLE_X11FWD +#if DROPBEAR_X11FWD /* set up X11 forwarding if enabled */ x11setauth(chansess); #endif -#ifdef ENABLE_SVR_AGENTFWD +#if DROPBEAR_SVR_AGENTFWD /* set up agent env variable */ svr_agentset(chansess); #endif
--- a/svr-kex.c Fri Mar 18 22:47:33 2016 +0800 +++ b/svr-kex.c Fri Jul 22 00:08:02 2016 +0800 @@ -54,18 +54,24 @@ } switch (ses.newkeys->algo_kex->mode) { +#if DROPBEAR_NORMAL_DH case DROPBEAR_KEX_NORMAL_DH: m_mp_init(&dh_e); if (buf_getmpint(ses.payload, &dh_e) != DROPBEAR_SUCCESS) { dropbear_exit("Bad kex value"); } break; +#endif +#if DROPBEAR_ECDH case DROPBEAR_KEX_ECDH: +#endif +#if DROPBEAR_CURVE25519 case DROPBEAR_KEX_CURVE25519: -#if defined(DROPBEAR_ECDH) || defined(DROPBEAR_CURVE25519) +#endif +#if DROPBEAR_ECDH || DROPBEAR_CURVE25519 ecdh_qs = buf_getstringbuf(ses.payload); + break; #endif - break; } if (ses.payload->pos != ses.payload->len) { dropbear_exit("Bad kex value"); @@ -85,7 +91,7 @@ } -#ifdef DROPBEAR_DELAY_HOSTKEY +#if DROPBEAR_DELAY_HOSTKEY static void fsync_parent_dir(const char* fn) { #ifdef HAVE_LIBGEN_H @@ -120,17 +126,17 @@ switch (type) { -#ifdef DROPBEAR_RSA +#if DROPBEAR_RSA case DROPBEAR_SIGNKEY_RSA: fn = RSA_PRIV_FILENAME; break; #endif -#ifdef DROPBEAR_DSS +#if DROPBEAR_DSS case DROPBEAR_SIGNKEY_DSS: fn = DSS_PRIV_FILENAME; break; #endif -#ifdef DROPBEAR_ECDSA +#if DROPBEAR_ECDSA case DROPBEAR_SIGNKEY_ECDSA_NISTP256: case DROPBEAR_SIGNKEY_ECDSA_NISTP384: case DROPBEAR_SIGNKEY_ECDSA_NISTP521: @@ -209,7 +215,7 @@ /* we can start creating the kexdh_reply packet */ CHECKCLEARTOWRITE(); -#ifdef DROPBEAR_DELAY_HOSTKEY +#if DROPBEAR_DELAY_HOSTKEY if (svr_opts.delay_hostkey) { svr_ensure_hostkey(); @@ -221,6 +227,7 @@ ses.newkeys->algo_hostkey); switch (ses.newkeys->algo_kex->mode) { +#if DROPBEAR_NORMAL_DH case DROPBEAR_KEX_NORMAL_DH: { struct kex_dh_param * dh_param = gen_kexdh_param(); @@ -231,8 +238,9 @@ free_kexdh_param(dh_param); } break; +#endif +#if DROPBEAR_ECDH case DROPBEAR_KEX_ECDH: -#ifdef DROPBEAR_ECDH { struct kex_ecdh_param *ecdh_param = gen_kexecdh_param(); kexecdh_comb_key(ecdh_param, ecdh_qs, svr_opts.hostkey); @@ -240,18 +248,18 @@ buf_put_ecc_raw_pubkey_string(ses.writepayload, &ecdh_param->key); free_kexecdh_param(ecdh_param); } + break; #endif - break; +#if DROPBEAR_CURVE25519 case DROPBEAR_KEX_CURVE25519: -#ifdef DROPBEAR_CURVE25519 { struct kex_curve25519_param *param = gen_kexcurve25519_param(); kexcurve25519_comb_key(param, ecdh_qs, svr_opts.hostkey); buf_putstring(ses.writepayload, (const char*)param->pub, CURVE25519_LEN); free_kexcurve25519_param(param); } + break; #endif - break; } /* calc the signature */
--- a/svr-main.c Fri Mar 18 22:47:33 2016 +0800 +++ b/svr-main.c Fri Jul 22 00:08:02 2016 +0800 @@ -43,8 +43,8 @@ #endif static void commonsetup(void); -#if defined(DBMULTI_dropbear) || !defined(DROPBEAR_MULTI) -#if defined(DBMULTI_dropbear) && defined(DROPBEAR_MULTI) +#if defined(DBMULTI_dropbear) || !DROPBEAR_MULTI +#if defined(DBMULTI_dropbear) && DROPBEAR_MULTI int dropbear_main(int argc, char ** argv) #else int main(int argc, char ** argv) @@ -144,7 +144,7 @@ /* fork */ if (svr_opts.forkbg) { int closefds = 0; -#ifndef DEBUG_TRACE +#if !DEBUG_TRACE if (!opts.usingsyslog) { closefds = 1; } @@ -429,7 +429,7 @@ for (n = 0; n < (unsigned int)nsock; n++) { int sock = socks[sockpos + n]; set_sock_priority(sock, DROPBEAR_PRIO_LOWDELAY); -#ifdef DROPBEAR_SERVER_TCP_FAST_OPEN +#if DROPBEAR_SERVER_TCP_FAST_OPEN set_listen_fast_open(sock); #endif }
--- a/svr-runopts.c Fri Mar 18 22:47:33 2016 +0800 +++ b/svr-runopts.c Fri Jul 22 00:08:02 2016 +0800 @@ -46,16 +46,16 @@ " (default: none)\n" "-r keyfile Specify hostkeys (repeatable)\n" " defaults: \n" -#ifdef DROPBEAR_DSS +#if DROPBEAR_DSS " dss %s\n" #endif -#ifdef DROPBEAR_RSA +#if DROPBEAR_RSA " rsa %s\n" #endif -#ifdef DROPBEAR_ECDSA +#if DROPBEAR_ECDSA " ecdsa %s\n" #endif -#ifdef DROPBEAR_DELAY_HOSTKEY +#if DROPBEAR_DELAY_HOSTKEY "-R Create hostkeys as required\n" #endif "-F Don't fork into background\n" @@ -68,17 +68,18 @@ "-m Don't display the motd on login\n" #endif "-w Disallow root logins\n" -#if defined(ENABLE_SVR_PASSWORD_AUTH) || defined(ENABLE_SVR_PAM_AUTH) +#if DROPBEAR_SVR_PASSWORD_AUTH || DROPBEAR_SVR_PAM_AUTH "-s Disable password logins\n" "-g Disable password logins for root\n" "-B Allow blank password logins\n" #endif -#ifdef ENABLE_SVR_LOCALTCPFWD +#if DROPBEAR_SVR_LOCALTCPFWD "-j Disable local port forwarding\n" #endif -#ifdef ENABLE_SVR_REMOTETCPFWD +#if DROPBEAR_SVR_REMOTETCPFWD "-k Disable remote port forwarding\n" "-a Allow connections to forwarded ports from any host\n" + "-c command Force executed command\n" #endif "-p [address:]port\n" " Listen on specified tcp port (and optionally address),\n" @@ -93,17 +94,17 @@ "-K <keepalive> (0 is never, default %d, in seconds)\n" "-I <idle_timeout> (0 is never, default %d, in seconds)\n" "-V Version\n" -#ifdef DEBUG_TRACE +#if DEBUG_TRACE "-v verbose (compiled with DEBUG_TRACE)\n" #endif ,DROPBEAR_VERSION, progname, -#ifdef DROPBEAR_DSS +#if DROPBEAR_DSS DSS_PRIV_FILENAME, #endif -#ifdef DROPBEAR_RSA +#if DROPBEAR_RSA RSA_PRIV_FILENAME, #endif -#ifdef DROPBEAR_ECDSA +#if DROPBEAR_ECDSA ECDSA_PRIV_FILENAME, #endif DROPBEAR_MAX_PORTS, DROPBEAR_DEFPORT, DROPBEAR_PIDFILE, @@ -125,6 +126,7 @@ /* see printhelp() for options */ svr_opts.bannerfile = NULL; svr_opts.banner = NULL; + svr_opts.forced_command = NULL; svr_opts.forkbg = 1; svr_opts.norootlogin = 0; svr_opts.noauthpass = 0; @@ -135,19 +137,15 @@ svr_opts.hostkey = NULL; svr_opts.delay_hostkey = 0; svr_opts.pidfile = DROPBEAR_PIDFILE; -#ifdef ENABLE_SVR_LOCALTCPFWD +#if DROPBEAR_SVR_LOCALTCPFWD svr_opts.nolocaltcp = 0; #endif -#ifdef ENABLE_SVR_REMOTETCPFWD +#if DROPBEAR_SVR_REMOTETCPFWD svr_opts.noremotetcp = 0; #endif #ifndef DISABLE_ZLIB -#if DROPBEAR_SERVER_DELAY_ZLIB opts.compress_mode = DROPBEAR_COMPRESS_DELAYED; -#else - opts.compress_mode = DROPBEAR_COMPRESS_ON; -#endif #endif /* not yet @@ -164,7 +162,7 @@ opts.keepalive_secs = DEFAULT_KEEPALIVE; opts.idle_timeout_secs = DEFAULT_IDLE_TIMEOUT; -#ifdef ENABLE_SVR_REMOTETCPFWD +#if DROPBEAR_SVR_REMOTETCPFWD opts.listen_fwd_all = 0; #endif @@ -177,6 +175,9 @@ case 'b': next = &svr_opts.bannerfile; break; + case 'c': + next = &svr_opts.forced_command; + break; case 'd': case 'r': next = &keyfile; @@ -192,12 +193,12 @@ opts.usingsyslog = 0; break; #endif -#ifdef ENABLE_SVR_LOCALTCPFWD +#if DROPBEAR_SVR_LOCALTCPFWD case 'j': svr_opts.nolocaltcp = 1; break; #endif -#ifdef ENABLE_SVR_REMOTETCPFWD +#if DROPBEAR_SVR_REMOTETCPFWD case 'k': svr_opts.noremotetcp = 1; break; @@ -234,7 +235,7 @@ case 'I': next = &idle_timeout_arg; break; -#if defined(ENABLE_SVR_PASSWORD_AUTH) || defined(ENABLE_SVR_PAM_AUTH) +#if DROPBEAR_SVR_PASSWORD_AUTH || DROPBEAR_SVR_PAM_AUTH case 's': svr_opts.noauthpass = 1; break; @@ -252,7 +253,7 @@ case 'u': /* backwards compatibility with old urandom option */ break; -#ifdef DEBUG_TRACE +#if DEBUG_TRACE case 'v': debug_trace = 1; break; @@ -346,6 +347,10 @@ } opts.idle_timeout_secs = val; } + + if (svr_opts.forced_command) { + dropbear_log(LOG_INFO, "Forced command set to '%s'", svr_opts.forced_command); + } } static void addportandaddress(const char* spec) { @@ -434,30 +439,30 @@ } } -#ifdef DROPBEAR_RSA +#if DROPBEAR_RSA if (type == DROPBEAR_SIGNKEY_RSA) { loadhostkey_helper("RSA", (void**)&read_key->rsakey, (void**)&svr_opts.hostkey->rsakey, fatal_duplicate); } #endif -#ifdef DROPBEAR_DSS +#if DROPBEAR_DSS if (type == DROPBEAR_SIGNKEY_DSS) { loadhostkey_helper("DSS", (void**)&read_key->dsskey, (void**)&svr_opts.hostkey->dsskey, fatal_duplicate); } #endif -#ifdef DROPBEAR_ECDSA -#ifdef DROPBEAR_ECC_256 +#if DROPBEAR_ECDSA +#if DROPBEAR_ECC_256 if (type == DROPBEAR_SIGNKEY_ECDSA_NISTP256) { loadhostkey_helper("ECDSA256", (void**)&read_key->ecckey256, (void**)&svr_opts.hostkey->ecckey256, fatal_duplicate); } #endif -#ifdef DROPBEAR_ECC_384 +#if DROPBEAR_ECC_384 if (type == DROPBEAR_SIGNKEY_ECDSA_NISTP384) { loadhostkey_helper("ECDSA384", (void**)&read_key->ecckey384, (void**)&svr_opts.hostkey->ecckey384, fatal_duplicate); } #endif -#ifdef DROPBEAR_ECC_521 +#if DROPBEAR_ECC_521 if (type == DROPBEAR_SIGNKEY_ECDSA_NISTP521) { loadhostkey_helper("ECDSA521", (void**)&read_key->ecckey521, (void**)&svr_opts.hostkey->ecckey521, fatal_duplicate); } @@ -488,25 +493,25 @@ m_free(hostkey_file); } -#ifdef DROPBEAR_RSA +#if DROPBEAR_RSA loadhostkey(RSA_PRIV_FILENAME, 0); #endif -#ifdef DROPBEAR_DSS +#if DROPBEAR_DSS loadhostkey(DSS_PRIV_FILENAME, 0); #endif -#ifdef DROPBEAR_ECDSA +#if DROPBEAR_ECDSA loadhostkey(ECDSA_PRIV_FILENAME, 0); #endif -#ifdef DROPBEAR_DELAY_HOSTKEY +#if DROPBEAR_DELAY_HOSTKEY if (svr_opts.delay_hostkey) { disable_unset_keys = 0; } #endif -#ifdef DROPBEAR_RSA +#if DROPBEAR_RSA if (disable_unset_keys && !svr_opts.hostkey->rsakey) { disablekey(DROPBEAR_SIGNKEY_RSA); } else { @@ -514,7 +519,7 @@ } #endif -#ifdef DROPBEAR_DSS +#if DROPBEAR_DSS if (disable_unset_keys && !svr_opts.hostkey->dsskey) { disablekey(DROPBEAR_SIGNKEY_DSS); } else { @@ -523,8 +528,8 @@ #endif -#ifdef DROPBEAR_ECDSA -#ifdef DROPBEAR_ECC_256 +#if DROPBEAR_ECDSA +#if DROPBEAR_ECC_256 if ((disable_unset_keys || ECDSA_DEFAULT_SIZE != 256) && !svr_opts.hostkey->ecckey256) { disablekey(DROPBEAR_SIGNKEY_ECDSA_NISTP256); @@ -533,7 +538,7 @@ } #endif -#ifdef DROPBEAR_ECC_384 +#if DROPBEAR_ECC_384 if ((disable_unset_keys || ECDSA_DEFAULT_SIZE != 384) && !svr_opts.hostkey->ecckey384) { disablekey(DROPBEAR_SIGNKEY_ECDSA_NISTP384); @@ -542,7 +547,7 @@ } #endif -#ifdef DROPBEAR_ECC_521 +#if DROPBEAR_ECC_521 if ((disable_unset_keys || ECDSA_DEFAULT_SIZE != 521) && !svr_opts.hostkey->ecckey521) { disablekey(DROPBEAR_SIGNKEY_ECDSA_NISTP521);
--- a/svr-session.c Fri Mar 18 22:47:33 2016 +0800 +++ b/svr-session.c Fri Jul 22 00:08:02 2016 +0800 @@ -62,7 +62,7 @@ {SSH_MSG_CHANNEL_FAILURE, ignore_recv_response}, {SSH_MSG_REQUEST_FAILURE, ignore_recv_response}, /* for keepalive */ {SSH_MSG_REQUEST_SUCCESS, ignore_recv_response}, /* client */ -#ifdef USING_LISTENERS +#if DROPBEAR_LISTENERS {SSH_MSG_CHANNEL_OPEN_CONFIRMATION, recv_msg_channel_open_confirmation}, {SSH_MSG_CHANNEL_OPEN_FAILURE, recv_msg_channel_open_failure}, #endif @@ -71,7 +71,7 @@ static const struct ChanType *svr_chantypes[] = { &svrchansess, -#ifdef ENABLE_SVR_LOCALTCPFWD +#if DROPBEAR_SVR_LOCALTCPFWD &svr_chan_tcpdirect, #endif NULL /* Null termination is mandatory. */ @@ -96,7 +96,7 @@ /* Initialise server specific parts of the session */ svr_ses.childpipe = childpipe; -#ifdef USE_VFORK +#if DROPBEAR_VFORK svr_ses.server_pid = getpid(); #endif svr_authinitialise(); @@ -144,33 +144,35 @@ /* failure exit - format must be <= 100 chars */ void svr_dropbear_exit(int exitcode, const char* format, va_list param) { - - char fmtbuf[300]; + char exitmsg[150]; + char fullmsg[300]; int i; + /* Render the formatted exit message */ + vsnprintf(exitmsg, sizeof(exitmsg), format, param); + + /* Add the prefix depending on session/auth state */ if (!sessinitdone) { /* before session init */ - snprintf(fmtbuf, sizeof(fmtbuf), - "Early exit: %s", format); + snprintf(fullmsg, sizeof(fullmsg), "Early exit: %s", exitmsg); } else if (ses.authstate.authdone) { /* user has authenticated */ - snprintf(fmtbuf, sizeof(fmtbuf), + snprintf(fullmsg, sizeof(fullmsg), "Exit (%s): %s", - ses.authstate.pw_name, format); + ses.authstate.pw_name, exitmsg); } else if (ses.authstate.pw_name) { /* we have a potential user */ - snprintf(fmtbuf, sizeof(fmtbuf), + snprintf(fullmsg, sizeof(fullmsg), "Exit before auth (user '%s', %u fails): %s", - ses.authstate.pw_name, ses.authstate.failcount, format); + ses.authstate.pw_name, ses.authstate.failcount, exitmsg); } else { /* before userauth */ - snprintf(fmtbuf, sizeof(fmtbuf), - "Exit before auth: %s", format); + snprintf(fullmsg, sizeof(fullmsg), "Exit before auth: %s", exitmsg); } - _dropbear_log(LOG_INFO, fmtbuf, param); + dropbear_log(LOG_INFO, "%s", fullmsg); -#ifdef USE_VFORK +#if DROPBEAR_VFORK /* For uclinux only the main server process should cleanup - we don't want * forked children doing that */ if (svr_ses.server_pid == getpid()) @@ -211,7 +213,7 @@ /* if we are using DEBUG_TRACE, we want to print to stderr even if * syslog is used, so it is included in error reports */ -#ifdef DEBUG_TRACE +#if DEBUG_TRACE havetrace = debug_trace; #endif
--- a/svr-tcpfwd.c Fri Mar 18 22:47:33 2016 +0800 +++ b/svr-tcpfwd.c Fri Jul 22 00:08:02 2016 +0800 @@ -35,7 +35,7 @@ #include "auth.h" #include "netio.h" -#ifndef ENABLE_SVR_REMOTETCPFWD +#ifndef DROPBEAR_SVR_REMOTETCPFWD /* This is better than SSH_MSG_UNIMPLEMENTED */ void recv_msg_global_request_remotetcp() { @@ -44,13 +44,13 @@ } /* */ -#endif /* !ENABLE_SVR_REMOTETCPFWD */ +#endif /* !DROPBEAR_SVR_REMOTETCPFWD */ static int svr_cancelremotetcp(void); static int svr_remotetcpreq(void); static int newtcpdirect(struct Channel * channel); -#ifdef ENABLE_SVR_REMOTETCPFWD +#if DROPBEAR_SVR_REMOTETCPFWD static const struct ChanType svr_chan_tcpremote = { 1, /* sepfds */ "forwarded-tcpip", @@ -215,9 +215,9 @@ return ret; } -#endif /* ENABLE_SVR_REMOTETCPFWD */ +#endif /* DROPBEAR_SVR_REMOTETCPFWD */ -#ifdef ENABLE_SVR_LOCALTCPFWD +#if DROPBEAR_SVR_LOCALTCPFWD const struct ChanType svr_chan_tcpdirect = { 1, /* sepfds */ @@ -283,4 +283,4 @@ return err; } -#endif /* ENABLE_SVR_LOCALTCPFWD */ +#endif /* DROPBEAR_SVR_LOCALTCPFWD */
--- a/svr-x11fwd.c Fri Mar 18 22:47:33 2016 +0800 +++ b/svr-x11fwd.c Fri Jul 22 00:08:02 2016 +0800 @@ -24,7 +24,7 @@ #include "includes.h" -#ifndef DISABLE_X11FWD +#if DROPBEAR_X11FWD #include "x11fwd.h" #include "session.h" #include "ssh.h"
--- a/sysoptions.h Fri Mar 18 22:47:33 2016 +0800 +++ b/sysoptions.h Fri Jul 22 00:08:02 2016 +0800 @@ -4,7 +4,7 @@ *******************************************************************/ #ifndef DROPBEAR_VERSION -#define DROPBEAR_VERSION "2016.73" +#define DROPBEAR_VERSION "2016.74" #endif #define LOCAL_IDENT "SSH-2.0-dropbear_" DROPBEAR_VERSION @@ -23,14 +23,20 @@ #define AUTH_TIMEOUT 300 /* we choose 5 minutes */ #endif + #define DROPBEAR_SVR_PUBKEY_OPTIONS_BUILT ((DROPBEAR_SVR_PUBKEY_AUTH) && (DROPBEAR_SVR_PUBKEY_OPTIONS)) + /* A client should try and send an initial key exchange packet guessing * the algorithm that will match - saves a round trip connecting, has little * overhead if the guess was "wrong". */ -#define USE_KEX_FIRST_FOLLOWS +#ifndef DROPBEAR_KEX_FIRST_FOLLOWS +#define DROPBEAR_KEX_FIRST_FOLLOWS 1 +#endif /* Use protocol extension to allow "first follows" to succeed more frequently. * This is currently Dropbear-specific but will gracefully fallback when connecting * to other implementations. */ -#define USE_KEXGUESS2 +#ifndef DROPBEAR_KEXGUESS2 +#define DROPBEAR_KEXGUESS2 1 +#endif /* Minimum key sizes for DSS and RSA */ #ifndef MIN_DSS_KEYLEN @@ -68,11 +74,11 @@ /* success/failure defines */ #define DROPBEAR_SUCCESS 0 #define DROPBEAR_FAILURE -1 + +#define DROPBEAR_PASSWORD_ENV "DROPBEAR_PASSWORD" /* Required for pubkey auth */ -#if defined(ENABLE_SVR_PUBKEY_AUTH) || defined(DROPBEAR_CLIENT) -#define DROPBEAR_SIGNKEY_VERIFY -#endif +#define DROPBEAR_SIGNKEY_VERIFY ((DROPBEAR_SVR_PUBKEY_AUTH) || (DROPBEAR_CLIENT)) #define SHA1_HASH_SIZE 20 #define MD5_HASH_SIZE 16 @@ -81,56 +87,45 @@ #define MAX_KEY_LEN 32 /* 256 bits for aes256 etc */ #define MAX_IV_LEN 20 /* must be same as max blocksize, */ -#if defined(DROPBEAR_SHA2_512_HMAC) +#if DROPBEAR_SHA2_512_HMAC #define MAX_MAC_LEN 64 -#elif defined(DROPBEAR_SHA2_256_HMAC) +#elif DROPBEAR_SHA2_256_HMAC #define MAX_MAC_LEN 32 #else #define MAX_MAC_LEN 20 #endif -#if defined(DROPBEAR_ECDH) || defined (DROPBEAR_ECDSA) -#define DROPBEAR_ECC + +#define DROPBEAR_ECC ((DROPBEAR_ECDH) || (DROPBEAR_ECDSA)) + /* Debian doesn't define this in system headers */ -#ifndef LTM_DESC -#define LTM_DESC -#endif +#if !defined(LTM_DESC) && (DROPBEAR_ECC) +#define LTM_DESC #endif -#ifdef DROPBEAR_ECC -#define DROPBEAR_ECC_256 -#define DROPBEAR_ECC_384 -#define DROPBEAR_ECC_521 -#endif +#define DROPBEAR_ECC_256 (DROPBEAR_ECC) +#define DROPBEAR_ECC_384 (DROPBEAR_ECC) +#define DROPBEAR_ECC_521 (DROPBEAR_ECC) -#ifdef DROPBEAR_ECC -#define DROPBEAR_LTC_PRNG -#endif +#define DROPBEAR_LTC_PRNG (DROPBEAR_ECC) /* RSA can be vulnerable to timing attacks which use the time required for * signing to guess the private key. Blinding avoids this attack, though makes * signing operations slightly slower. */ -#define RSA_BLINDING +#define DROPBEAR_RSA_BLINDING 1 /* hashes which will be linked and registered */ -#if defined(DROPBEAR_SHA2_256_HMAC) || defined(DROPBEAR_ECC_256) || defined(DROPBEAR_CURVE25519) || DROPBEAR_DH_GROUP14 -#define DROPBEAR_SHA256 -#endif -#if defined(DROPBEAR_ECC_384) -#define DROPBEAR_SHA384 -#endif +#define DROPBEAR_SHA256 ((DROPBEAR_SHA2_256_HMAC) || (DROPBEAR_ECC_256) \ + || (DROPBEAR_CURVE25519) || (DROPBEAR_DH_GROUP14_SHA256)) +#define DROPBEAR_SHA384 (DROPBEAR_ECC_384) /* LTC SHA384 depends on SHA512 */ -#if defined(DROPBEAR_SHA2_512_HMAC) || defined(DROPBEAR_ECC_521) || defined(DROPBEAR_ECC_384) || DROPBEAR_DH_GROUP16 -#define DROPBEAR_SHA512 -#endif -#if defined(DROPBEAR_MD5_HMAC) -#define DROPBEAR_MD5 -#endif +#define DROPBEAR_SHA512 ((DROPBEAR_SHA2_512_HMAC) || (DROPBEAR_ECC_521) \ + || (DROPBEAR_SHA384) || (DROPBEAR_DH_GROUP16)) +#define DROPBEAR_MD5 (DROPBEAR_MD5_HMAC) -/* These are disabled in Dropbear 2016.73 by default since the spec - draft-ietf-curdle-ssh-kex-sha2-02 is under development. */ -#define DROPBEAR_DH_GROUP14_256 0 -#define DROPBEAR_DH_GROUP16 0 +#define DROPBEAR_DH_GROUP14 ((DROPBEAR_DH_GROUP14_SHA256) || (DROPBEAR_DH_GROUP14_SHA1)) + +#define DROPBEAR_NORMAL_DH ((DROPBEAR_DH_GROUP1) || (DROPBEAR_DH_GROUP14) || (DROPBEAR_DH_GROUP16)) /* roughly 2x 521 bits */ #define MAX_ECC_SIZE 140 @@ -182,65 +177,47 @@ auth */ -#if defined(DROPBEAR_AES256) || defined(DROPBEAR_AES128) -#define DROPBEAR_AES -#endif +#define DROPBEAR_AES ((DROPBEAR_AES256) || (DROPBEAR_AES128)) -#if defined(DROPBEAR_TWOFISH256) || defined(DROPBEAR_TWOFISH128) -#define DROPBEAR_TWOFISH -#endif +#define DROPBEAR_TWOFISH ((DROPBEAR_TWOFISH256) || (DROPBEAR_TWOFISH128)) -#ifndef ENABLE_X11FWD -#define DISABLE_X11FWD -#endif +#define DROPBEAR_CLI_ANYTCPFWD ((DROPBEAR_CLI_REMOTETCPFWD) || (DROPBEAR_CLI_LOCALTCPFWD)) -#if defined(ENABLE_CLI_REMOTETCPFWD) || defined(ENABLE_CLI_LOCALTCPFWD) -#define ENABLE_CLI_ANYTCPFWD -#endif +#define DROPBEAR_TCP_ACCEPT ((DROPBEAR_CLI_LOCALTCPFWD) || (DROPBEAR_SVR_REMOTETCPFWD)) -#if defined(ENABLE_CLI_LOCALTCPFWD) || defined(ENABLE_SVR_REMOTETCPFWD) -#define DROPBEAR_TCP_ACCEPT -#endif - -#if defined(ENABLE_CLI_REMOTETCPFWD) || defined(ENABLE_CLI_LOCALTCPFWD) || \ - defined(ENABLE_SVR_REMOTETCPFWD) || defined(ENABLE_SVR_LOCALTCPFWD) || \ - defined(ENABLE_SVR_AGENTFWD) || defined(ENABLE_X11FWD) -#define USING_LISTENERS -#endif +#define DROPBEAR_LISTENERS \ + ((DROPBEAR_CLI_REMOTETCPFWD) || (DROPBEAR_CLI_LOCALTCPFWD) || \ + (DROPBEAR_SVR_REMOTETCPFWD) || (DROPBEAR_SVR_LOCALTCPFWD) || \ + (DROPBEAR_SVR_AGENTFWD) || (DROPBEAR_X11FWD)) -#if defined(ENABLE_CLI_NETCAT) && defined(ENABLE_CLI_PROXYCMD) -#define ENABLE_CLI_MULTIHOP -#endif +#define DROPBEAR_CLI_MULTIHOP ((DROPBEAR_CLI_NETCAT) && (DROPBEAR_CLI_PROXYCMD)) -#if defined(ENABLE_CLI_AGENTFWD) || defined(DROPBEAR_PRNGD_SOCKET) -#define ENABLE_CONNECT_UNIX -#endif +#define ENABLE_CONNECT_UNIX ((DROPBEAR_CLI_AGENTFWD) || (DROPBEAR_PRNGD_SOCKET)) -#if defined(DROPBEAR_CLIENT) || defined(ENABLE_SVR_PUBKEY_AUTH) -#define DROPBEAR_KEY_LINES /* ie we're using authorized_keys or known_hosts */ -#endif +/* if we're using authorized_keys or known_hosts */ +#define DROPBEAR_KEY_LINES ((DROPBEAR_CLIENT) || (DROPBEAR_SVR_PUBKEY_AUTH)) /* Changing this is inadvisable, it appears to have problems * with flushing compressed data */ #define DROPBEAR_ZLIB_MEM_LEVEL 8 -#if defined(ENABLE_SVR_PASSWORD_AUTH) && defined(ENABLE_SVR_PAM_AUTH) +#if (DROPBEAR_SVR_PASSWORD_AUTH) && (DROPBEAR_SVR_PAM_AUTH) #error "You can't turn on PASSWORD and PAM auth both at once. Fix it in options.h" #endif /* We use dropbear_client and dropbear_server as shortcuts to avoid redundant * code, if we're just compiling as client or server */ -#if defined(DROPBEAR_SERVER) && defined(DROPBEAR_CLIENT) +#if (DROPBEAR_SERVER) && (DROPBEAR_CLIENT) #define IS_DROPBEAR_SERVER (ses.isserver == 1) #define IS_DROPBEAR_CLIENT (ses.isserver == 0) -#elif defined(DROPBEAR_SERVER) +#elif DROPBEAR_SERVER #define IS_DROPBEAR_SERVER 1 #define IS_DROPBEAR_CLIENT 0 -#elif defined(DROPBEAR_CLIENT) +#elif DROPBEAR_CLIENT #define IS_DROPBEAR_SERVER 0 #define IS_DROPBEAR_CLIENT 1 @@ -252,9 +229,11 @@ #endif /* neither DROPBEAR_SERVER nor DROPBEAR_CLIENT */ -#ifndef HAVE_FORK -#define USE_VFORK -#endif /* don't HAVE_FORK */ +#ifdef HAVE_FORK +#define DROPBEAR_VFORK 0 +#else +#define DROPBEAR_VFORK 1 +#endif #if MAX_UNAUTH_CLIENTS > MAX_CHANNELS #define DROPBEAR_LISTEN_BACKLOG MAX_UNAUTH_CLIENTS @@ -262,8 +241,12 @@ #define DROPBEAR_LISTEN_BACKLOG MAX_CHANNELS #endif +#ifndef DROPBEAR_NONE_CIPHER +#define DROPBEAR_NONE_CIPHER 0 +#endif + /* free memory before exiting */ -#define DROPBEAR_CLEANUP +#define DROPBEAR_CLEANUP 1 /* Use this string since some implementations might special-case it */ #define DROPBEAR_KEEPALIVE_STRING "[email protected]" @@ -272,8 +255,11 @@ * Currently server is enabled but client is disabled by default until there * is further compatibility testing */ #ifdef __linux__ -#define DROPBEAR_SERVER_TCP_FAST_OPEN -/* #define DROPBEAR_CLIENT_TCP_FAST_OPEN */ +#define DROPBEAR_SERVER_TCP_FAST_OPEN 1 +#define DROPBEAR_CLIENT_TCP_FAST_OPEN 0 +#else +#define DROPBEAR_SERVER_TCP_FAST_OPEN 0 +#define DROPBEAR_CLIENT_TCP_FAST_OPEN 0 #endif /* no include guard for this file */