dropbear: default_options.h annotate

annotate default_options.h @ 1861:2b3a8026a6ce

Add re-exec for server This allows ASLR to re-randomize the address space for every connection, preventing some vulnerabilities from being exploitable by repeated probing. Overhead (memory and time) is yet to be confirmed. At present this is only enabled on Linux. Other BSD platforms with fexecve() would probably also work though have not been tested.

author	Matt Johnston <matt@ucc.asn.au>
date	Sun, 30 Jan 2022 10:14:56 +0800
parents	35d504d59c05
children	40f8468ad4d4

rev	line source
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1 #ifndef DROPBEAR_DEFAULT_OPTIONS_H_
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	2 #define DROPBEAR_DEFAULT_OPTIONS_H_
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	3 /*
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	4 > > > Read This < < <
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	5
1521 198e2ee0f4b1 - Fix dependencies and remove old default_options.h from version control Matt Johnston <matt@ucc.asn.au> parents: 1517 diff changeset	6 default_options.h documents compile-time options, and provides default values.
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	7
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	8 Local customisation should be added to localoptions.h which is
1614 03df3b9f6048 mention localoptions.h being build directory, fix underscore in CHANGES Matt Johnston <matt@ucc.asn.au> parents: 1544 diff changeset	9 used if it exists in the build directory. Options defined there will override
03df3b9f6048 mention localoptions.h being build directory, fix underscore in CHANGES Matt Johnston <matt@ucc.asn.au> parents: 1544 diff changeset	10 any options in this file.
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	11
1517 7c7c5326ad73 clean up some default options Matt Johnston <matt@ucc.asn.au> parents: 1514 diff changeset	12 Options can also be defined with -DDROPBEAR_XXX=[0,1] in Makefile CFLAGS
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	13
1517 7c7c5326ad73 clean up some default options Matt Johnston <matt@ucc.asn.au> parents: 1514 diff changeset	14 IMPORTANT: Some options will require "make clean" after changes */
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	15
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	16 #define DROPBEAR_DEFPORT "22"
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	17
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	18 /* Listen on all interfaces */
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	19 #define DROPBEAR_DEFADDRESS ""
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	20
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	21 /* Default hostkey paths - these can be specified on the command line */
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	22 #define DSS_PRIV_FILENAME "/etc/dropbear/dropbear_dss_host_key"
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	23 #define RSA_PRIV_FILENAME "/etc/dropbear/dropbear_rsa_host_key"
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	24 #define ECDSA_PRIV_FILENAME "/etc/dropbear/dropbear_ecdsa_host_key"
1659 d32bcb5c557d Add Ed25519 support (#91) Vladislav Grishenko <themiron@users.noreply.github.com> parents: 1634 diff changeset	25 #define ED25519_PRIV_FILENAME "/etc/dropbear/dropbear_ed25519_host_key"
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	26
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	27 /* Set NON_INETD_MODE if you require daemon functionality (ie Dropbear listens
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	28 * on chosen ports and keeps accepting connections. This is the default.
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	29 *
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	30 * Set INETD_MODE if you want to be able to run Dropbear with inetd (or
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	31 * similar), where it will use stdin/stdout for connections, and each process
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	32 * lasts for a single connection. Dropbear should be invoked with the -i flag
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	33 * for inetd, and can only accept IPv4 connections.
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	34 *
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	35 * Both of these flags can be defined at once, don't compile without at least
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	36 * one of them. */
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	37 #define NON_INETD_MODE 1
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	38 #define INETD_MODE 1
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	39
1861 2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1855 diff changeset	40 /* By default Dropbear will re-execute itself for each incoming connection so
2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1855 diff changeset	41 that memory layout may be re-randomised (ASLR) - exploiting
2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1855 diff changeset	42 vulnerabilities becomes harder. Re-exec causes slightly more memory use
2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1855 diff changeset	43 per connection.
2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1855 diff changeset	44 This option is ignored on non-Linux platforms at present */
2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1855 diff changeset	45 #define DROPBEAR_REEXEC 1
2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1855 diff changeset	46
2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1855 diff changeset	47 /* Include verbose debug output, enabled with -v at runtime.
1514 6c16a05023aa rename some options and move some to sysoptions.h Matt Johnston <matt@ucc.asn.au> parents: 1499 diff changeset	48 * This will add a reasonable amount to your executable size. */
6c16a05023aa rename some options and move some to sysoptions.h Matt Johnston <matt@ucc.asn.au> parents: 1499 diff changeset	49 #define DEBUG_TRACE 0
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	50
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	51 /* Set this if you want to use the DROPBEAR_SMALL_CODE option. This can save
1517 7c7c5326ad73 clean up some default options Matt Johnston <matt@ucc.asn.au> parents: 1514 diff changeset	52 * several kB in binary size however will make the symmetrical ciphers and hashes
7c7c5326ad73 clean up some default options Matt Johnston <matt@ucc.asn.au> parents: 1514 diff changeset	53 * slower, perhaps by 50%. Recommended for small systems that aren't doing
7c7c5326ad73 clean up some default options Matt Johnston <matt@ucc.asn.au> parents: 1514 diff changeset	54 * much traffic. */
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	55 #define DROPBEAR_SMALL_CODE 1
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	56
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	57 /* Enable X11 Forwarding - server only */
1714 c0f12eaf95c9 Disable by default 3des, cbc, hmac-sha1-96, x11 forwarding Matt Johnston <matt@ucc.asn.au> parents: 1713 diff changeset	58 #define DROPBEAR_X11FWD 0
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	59
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	60 /* Enable TCP Fowarding */
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	61 /* 'Local' is "-L" style (client listening port forwarded via server)
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	62 * 'Remote' is "-R" style (server listening port forwarded via client) */
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	63 #define DROPBEAR_CLI_LOCALTCPFWD 1
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	64 #define DROPBEAR_CLI_REMOTETCPFWD 1
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	65
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	66 #define DROPBEAR_SVR_LOCALTCPFWD 1
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	67 #define DROPBEAR_SVR_REMOTETCPFWD 1
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	68
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	69 /* Enable Authentication Agent Forwarding */
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	70 #define DROPBEAR_SVR_AGENTFWD 1
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	71 #define DROPBEAR_CLI_AGENTFWD 1
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	72
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	73 /* Note: Both DROPBEAR_CLI_PROXYCMD and DROPBEAR_CLI_NETCAT must be set to
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	74 * allow multihop dbclient connections */
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	75
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	76 /* Allow using -J <proxycommand> to run the connection through a
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	77 pipe to a program, rather the normal TCP connection */
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	78 #define DROPBEAR_CLI_PROXYCMD 1
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	79
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	80 /* Enable "Netcat mode" option. This will forward standard input/output
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	81 * to a remote TCP-forwarded connection */
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	82 #define DROPBEAR_CLI_NETCAT 1
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	83
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	84 /* Whether to support "-c" and "-m" flags to choose ciphers/MACs at runtime */
1499 2d450c1056e3 options: Complete the transition to numeric toggles (`#if') Michael Witten <mfwitten@gmail.com> parents: 1494 diff changeset	85 #define DROPBEAR_USER_ALGO_LIST 1
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	86
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	87 /* Encryption - at least one required.
1514 6c16a05023aa rename some options and move some to sysoptions.h Matt Johnston <matt@ucc.asn.au> parents: 1499 diff changeset	88 * AES128 should be enabled, some very old implementations might only
6c16a05023aa rename some options and move some to sysoptions.h Matt Johnston <matt@ucc.asn.au> parents: 1499 diff changeset	89 * support 3DES.
6c16a05023aa rename some options and move some to sysoptions.h Matt Johnston <matt@ucc.asn.au> parents: 1499 diff changeset	90 * Including both AES keysize variants (128 and 256) will result in
6c16a05023aa rename some options and move some to sysoptions.h Matt Johnston <matt@ucc.asn.au> parents: 1499 diff changeset	91 * a minimal size increase */
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	92 #define DROPBEAR_AES128 1
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	93 #define DROPBEAR_AES256 1
1714 c0f12eaf95c9 Disable by default 3des, cbc, hmac-sha1-96, x11 forwarding Matt Johnston <matt@ucc.asn.au> parents: 1713 diff changeset	94 #define DROPBEAR_3DES 0
1517 7c7c5326ad73 clean up some default options Matt Johnston <matt@ucc.asn.au> parents: 1514 diff changeset	95 #define DROPBEAR_TWOFISH256 0
7c7c5326ad73 clean up some default options Matt Johnston <matt@ucc.asn.au> parents: 1514 diff changeset	96 #define DROPBEAR_TWOFISH128 0
1499 2d450c1056e3 options: Complete the transition to numeric toggles (`#if') Michael Witten <mfwitten@gmail.com> parents: 1494 diff changeset	97
1714 c0f12eaf95c9 Disable by default 3des, cbc, hmac-sha1-96, x11 forwarding Matt Johnston <matt@ucc.asn.au> parents: 1713 diff changeset	98 /* Enable Chacha20-Poly1305 authenticated encryption mode. This is
c0f12eaf95c9 Disable by default 3des, cbc, hmac-sha1-96, x11 forwarding Matt Johnston <matt@ucc.asn.au> parents: 1713 diff changeset	99 * generally faster than AES256 on CPU w/o dedicated AES instructions,
c0f12eaf95c9 Disable by default 3des, cbc, hmac-sha1-96, x11 forwarding Matt Johnston <matt@ucc.asn.au> parents: 1713 diff changeset	100 * having the same key size. Recommended.
c0f12eaf95c9 Disable by default 3des, cbc, hmac-sha1-96, x11 forwarding Matt Johnston <matt@ucc.asn.au> parents: 1713 diff changeset	101 * Compiling in will add ~5,5kB to binary size on x86-64 */
c0f12eaf95c9 Disable by default 3des, cbc, hmac-sha1-96, x11 forwarding Matt Johnston <matt@ucc.asn.au> parents: 1713 diff changeset	102 #define DROPBEAR_CHACHA20POLY1305 1
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	103
1714 c0f12eaf95c9 Disable by default 3des, cbc, hmac-sha1-96, x11 forwarding Matt Johnston <matt@ucc.asn.au> parents: 1713 diff changeset	104 /* Enable "Counter Mode" for ciphers. Recommended. */
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	105 #define DROPBEAR_ENABLE_CTR_MODE 1
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	106
1714 c0f12eaf95c9 Disable by default 3des, cbc, hmac-sha1-96, x11 forwarding Matt Johnston <matt@ucc.asn.au> parents: 1713 diff changeset	107 /* Enable CBC mode for ciphers. This has security issues though
c0f12eaf95c9 Disable by default 3des, cbc, hmac-sha1-96, x11 forwarding Matt Johnston <matt@ucc.asn.au> parents: 1713 diff changeset	108 may be required for compatibility with old implementations */
c0f12eaf95c9 Disable by default 3des, cbc, hmac-sha1-96, x11 forwarding Matt Johnston <matt@ucc.asn.au> parents: 1713 diff changeset	109 #define DROPBEAR_ENABLE_CBC_MODE 0
c0f12eaf95c9 Disable by default 3des, cbc, hmac-sha1-96, x11 forwarding Matt Johnston <matt@ucc.asn.au> parents: 1713 diff changeset	110
1672 3a97f14c0235 Add Chacha20-Poly1305, AES128-GCM and AES256-GCM support (#93) Vladislav Grishenko <themiron@users.noreply.github.com> parents: 1660 diff changeset	111 /* Enable "Galois/Counter Mode" for ciphers. This authenticated
3a97f14c0235 Add Chacha20-Poly1305, AES128-GCM and AES256-GCM support (#93) Vladislav Grishenko <themiron@users.noreply.github.com> parents: 1660 diff changeset	112 * encryption mode is combination of CTR mode and GHASH. Recommended
3a97f14c0235 Add Chacha20-Poly1305, AES128-GCM and AES256-GCM support (#93) Vladislav Grishenko <themiron@users.noreply.github.com> parents: 1660 diff changeset	113 * for security and forwards compatibility, but slower than CTR on
3a97f14c0235 Add Chacha20-Poly1305, AES128-GCM and AES256-GCM support (#93) Vladislav Grishenko <themiron@users.noreply.github.com> parents: 1660 diff changeset	114 * CPU w/o dedicated AES/GHASH instructions.
3a97f14c0235 Add Chacha20-Poly1305, AES128-GCM and AES256-GCM support (#93) Vladislav Grishenko <themiron@users.noreply.github.com> parents: 1660 diff changeset	115 * Compiling in will add ~6kB to binary size on x86-64 */
3a97f14c0235 Add Chacha20-Poly1305, AES128-GCM and AES256-GCM support (#93) Vladislav Grishenko <themiron@users.noreply.github.com> parents: 1660 diff changeset	116 #define DROPBEAR_ENABLE_GCM_MODE 0
3a97f14c0235 Add Chacha20-Poly1305, AES128-GCM and AES256-GCM support (#93) Vladislav Grishenko <themiron@users.noreply.github.com> parents: 1660 diff changeset	117
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	118 /* Message integrity. sha2-256 is recommended as a default,
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	119 sha1 for compatibility */
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	120 #define DROPBEAR_SHA1_HMAC 1
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	121 #define DROPBEAR_SHA2_256_HMAC 1
1714 c0f12eaf95c9 Disable by default 3des, cbc, hmac-sha1-96, x11 forwarding Matt Johnston <matt@ucc.asn.au> parents: 1713 diff changeset	122 #define DROPBEAR_SHA1_96_HMAC 0
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	123
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	124 /* Hostkey/public key algorithms - at least one required, these are used
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	125 * for hostkey as well as for verifying signatures with pubkey auth.
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	126 * Removing either of these won't save very much space.
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	127 * RSA is recommended
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	128 * DSS may be necessary to connect to some systems though
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	129 is not recommended for new keys */
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	130 #define DROPBEAR_RSA 1
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	131 #define DROPBEAR_DSS 1
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	132 /* ECDSA is significantly faster than RSA or DSS. Compiling in ECC
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	133 * code (either ECDSA or ECDH) increases binary size - around 30kB
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	134 * on x86-64 */
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	135 #define DROPBEAR_ECDSA 1
1855 35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142) egor-duda <egor-duda@users.noreply.github.com> parents: 1794 diff changeset	136 #define DROPBEAR_SK_ECDSA 1
1659 d32bcb5c557d Add Ed25519 support (#91) Vladislav Grishenko <themiron@users.noreply.github.com> parents: 1634 diff changeset	137 /* Ed25519 is faster than ECDSA. Compiling in Ed25519 code increases
d32bcb5c557d Add Ed25519 support (#91) Vladislav Grishenko <themiron@users.noreply.github.com> parents: 1634 diff changeset	138 binary size - around 7,5kB on x86-64 */
d32bcb5c557d Add Ed25519 support (#91) Vladislav Grishenko <themiron@users.noreply.github.com> parents: 1634 diff changeset	139 #define DROPBEAR_ED25519 1
1855 35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142) egor-duda <egor-duda@users.noreply.github.com> parents: 1794 diff changeset	140 #define DROPBEAR_SK_ED25519 1
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	141
1438 4f8eb331174f add configuration option for default RSA size. Matt Johnston <matt@ucc.asn.au> parents: 1295 diff changeset	142 /* RSA must be >=1024 */
4f8eb331174f add configuration option for default RSA size. Matt Johnston <matt@ucc.asn.au> parents: 1295 diff changeset	143 #define DROPBEAR_DEFAULT_RSA_SIZE 2048
4f8eb331174f add configuration option for default RSA size. Matt Johnston <matt@ucc.asn.au> parents: 1295 diff changeset	144 /* DSS is always 1024 */
4f8eb331174f add configuration option for default RSA size. Matt Johnston <matt@ucc.asn.au> parents: 1295 diff changeset	145 /* ECDSA defaults to largest size configured, usually 521 */
1659 d32bcb5c557d Add Ed25519 support (#91) Vladislav Grishenko <themiron@users.noreply.github.com> parents: 1634 diff changeset	146 /* Ed25519 is always 256 */
1438 4f8eb331174f add configuration option for default RSA size. Matt Johnston <matt@ucc.asn.au> parents: 1295 diff changeset	147
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	148 /* Add runtime flag "-R" to generate hostkeys as-needed when the first
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	149 connection using that key type occurs.
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	150 This avoids the need to otherwise run "dropbearkey" and avoids some problems
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	151 with badly seeded /dev/urandom when systems first boot. */
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	152 #define DROPBEAR_DELAY_HOSTKEY 1
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	153
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	154
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	155 /* Key exchange algorithm.
1517 7c7c5326ad73 clean up some default options Matt Johnston <matt@ucc.asn.au> parents: 1514 diff changeset	156
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	157 * group14_sha1 - 2048 bit, sha1
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	158 * group14_sha256 - 2048 bit, sha2-256
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	159 * group16 - 4096 bit, sha2-512
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	160 * group1 - 1024 bit, sha1
1517 7c7c5326ad73 clean up some default options Matt Johnston <matt@ucc.asn.au> parents: 1514 diff changeset	161 * curve25519 - elliptic curve DH
7c7c5326ad73 clean up some default options Matt Johnston <matt@ucc.asn.au> parents: 1514 diff changeset	162 * ecdh - NIST elliptic curve DH (256, 384, 521)
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	163 *
1517 7c7c5326ad73 clean up some default options Matt Johnston <matt@ucc.asn.au> parents: 1514 diff changeset	164 * group1 is too small for security though is necessary if you need
7c7c5326ad73 clean up some default options Matt Johnston <matt@ucc.asn.au> parents: 1514 diff changeset	165 compatibility with some implementations such as Dropbear versions < 0.53
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	166 * group14 is supported by most implementations.
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	167 * group16 provides a greater strength level but is slower and increases binary size
1517 7c7c5326ad73 clean up some default options Matt Johnston <matt@ucc.asn.au> parents: 1514 diff changeset	168 * curve25519 and ecdh algorithms are faster than non-elliptic curve methods
1659 d32bcb5c557d Add Ed25519 support (#91) Vladislav Grishenko <themiron@users.noreply.github.com> parents: 1634 diff changeset	169 * curve25519 increases binary size by ~2,5kB on x86-64
1517 7c7c5326ad73 clean up some default options Matt Johnston <matt@ucc.asn.au> parents: 1514 diff changeset	170 * including either ECDH or ECDSA increases binary size by ~30kB on x86-64
7c7c5326ad73 clean up some default options Matt Johnston <matt@ucc.asn.au> parents: 1514 diff changeset	171
7c7c5326ad73 clean up some default options Matt Johnston <matt@ucc.asn.au> parents: 1514 diff changeset	172 * Small systems should generally include either curve25519 or ecdh for performance.
7c7c5326ad73 clean up some default options Matt Johnston <matt@ucc.asn.au> parents: 1514 diff changeset	173 * curve25519 is less widely supported but is faster
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	174 */
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	175 #define DROPBEAR_DH_GROUP14_SHA1 1
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	176 #define DROPBEAR_DH_GROUP14_SHA256 1
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	177 #define DROPBEAR_DH_GROUP16 0
1517 7c7c5326ad73 clean up some default options Matt Johnston <matt@ucc.asn.au> parents: 1514 diff changeset	178 #define DROPBEAR_CURVE25519 1
7c7c5326ad73 clean up some default options Matt Johnston <matt@ucc.asn.au> parents: 1514 diff changeset	179 #define DROPBEAR_ECDH 1
1544 d1a8a05216ff make group1 client-only Matt Johnston <matt@ucc.asn.au> parents: 1542 diff changeset	180 #define DROPBEAR_DH_GROUP1 1
d1a8a05216ff make group1 client-only Matt Johnston <matt@ucc.asn.au> parents: 1542 diff changeset	181
d1a8a05216ff make group1 client-only Matt Johnston <matt@ucc.asn.au> parents: 1542 diff changeset	182 /* When group1 is enabled it will only be allowed by Dropbear client
d1a8a05216ff make group1 client-only Matt Johnston <matt@ucc.asn.au> parents: 1542 diff changeset	183 not as a server, due to concerns over its strength. Set to 0 to allow
d1a8a05216ff make group1 client-only Matt Johnston <matt@ucc.asn.au> parents: 1542 diff changeset	184 group1 in Dropbear server too */
d1a8a05216ff make group1 client-only Matt Johnston <matt@ucc.asn.au> parents: 1542 diff changeset	185 #define DROPBEAR_DH_GROUP1_CLIENTONLY 1
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	186
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	187 /* Control the memory/performance/compression tradeoff for zlib.
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	188 * Set windowBits=8 for least memory usage, see your system's
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	189 * zlib.h for full details.
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	190 * Default settings (windowBits=15) will use 256kB for compression
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	191 * windowBits=8 will use 129kB for compression.
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	192 * Both modes will use ~35kB for decompression (using windowBits=15 for
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	193 * interoperability) */
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	194 #define DROPBEAR_ZLIB_WINDOW_BITS 15
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	195
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	196 /* Whether to do reverse DNS lookups. */
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	197 #define DO_HOST_LOOKUP 0
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	198
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	199 /* Whether to print the message of the day (MOTD). */
1660 26e07f7f682a MOTD enabled by default as the manpage says (#87) zciendor <37557036+zciendor@users.noreply.github.com> parents: 1659 diff changeset	200 #define DO_MOTD 1
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	201 #define MOTD_FILENAME "/etc/motd"
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	202
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	203 /* Authentication Types - at least one required.
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	204 RFC Draft requires pubkey auth, and recommends password */
1514 6c16a05023aa rename some options and move some to sysoptions.h Matt Johnston <matt@ucc.asn.au> parents: 1499 diff changeset	205 #define DROPBEAR_SVR_PASSWORD_AUTH 1
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	206
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	207 /* Note: PAM auth is quite simple and only works for PAM modules which just do
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	208 * a simple "Login: " "Password: " (you can edit the strings in svr-authpam.c).
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	209 * It's useful for systems like OS X where standard password crypts don't work
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	210 * but there's an interface via a PAM module. It won't work for more complex
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	211 * PAM challenge/response.
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	212 * You can't enable both PASSWORD and PAM. */
1514 6c16a05023aa rename some options and move some to sysoptions.h Matt Johnston <matt@ucc.asn.au> parents: 1499 diff changeset	213 #define DROPBEAR_SVR_PAM_AUTH 0
1499 2d450c1056e3 options: Complete the transition to numeric toggles (`#if') Michael Witten <mfwitten@gmail.com> parents: 1494 diff changeset	214
1514 6c16a05023aa rename some options and move some to sysoptions.h Matt Johnston <matt@ucc.asn.au> parents: 1499 diff changeset	215 /* ~/.ssh/authorized_keys authentication */
6c16a05023aa rename some options and move some to sysoptions.h Matt Johnston <matt@ucc.asn.au> parents: 1499 diff changeset	216 #define DROPBEAR_SVR_PUBKEY_AUTH 1
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	217
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	218 /* Whether to take public key options in
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	219 * authorized_keys file into account */
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	220 #define DROPBEAR_SVR_PUBKEY_OPTIONS 1
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	221
1634 aabde6f57fce Add a sanity check for DROPBEAR_SVR_MULTIUSER==0 mode Matt Johnston <matt@ucc.asn.au> parents: 1633 diff changeset	222 /* Set this to 0 if your system does not have multiple user support.
aabde6f57fce Add a sanity check for DROPBEAR_SVR_MULTIUSER==0 mode Matt Johnston <matt@ucc.asn.au> parents: 1633 diff changeset	223 (Linux kernel CONFIG_MULTIUSER option)
aabde6f57fce Add a sanity check for DROPBEAR_SVR_MULTIUSER==0 mode Matt Johnston <matt@ucc.asn.au> parents: 1633 diff changeset	224 The resulting binary will not run on a normal system. */
1633 592a18dac250 Support servers without multiple user support (#76) Patrick Stewart <patstew@gmail.com> parents: 1617 diff changeset	225 #define DROPBEAR_SVR_MULTIUSER 1
592a18dac250 Support servers without multiple user support (#76) Patrick Stewart <patstew@gmail.com> parents: 1617 diff changeset	226
1514 6c16a05023aa rename some options and move some to sysoptions.h Matt Johnston <matt@ucc.asn.au> parents: 1499 diff changeset	227 /* Client authentication options */
6c16a05023aa rename some options and move some to sysoptions.h Matt Johnston <matt@ucc.asn.au> parents: 1499 diff changeset	228 #define DROPBEAR_CLI_PASSWORD_AUTH 1
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	229 #define DROPBEAR_CLI_PUBKEY_AUTH 1
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	230
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	231 /* A default argument for dbclient -i <privatekey>.
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	232 Homedir is prepended unless path begins with / */
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	233 #define DROPBEAR_DEFAULT_CLI_AUTHKEY ".ssh/id_dropbear"
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	234
1514 6c16a05023aa rename some options and move some to sysoptions.h Matt Johnston <matt@ucc.asn.au> parents: 1499 diff changeset	235 /* Allow specifying the password for dbclient via the DROPBEAR_PASSWORD
6c16a05023aa rename some options and move some to sysoptions.h Matt Johnston <matt@ucc.asn.au> parents: 1499 diff changeset	236 * environment variable. */
6c16a05023aa rename some options and move some to sysoptions.h Matt Johnston <matt@ucc.asn.au> parents: 1499 diff changeset	237 #define DROPBEAR_USE_PASSWORD_ENV 1
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	238
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	239 /* Define this (as well as DROPBEAR_CLI_PASSWORD_AUTH) to allow the use of
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	240 * a helper program for the ssh client. The helper program should be
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	241 * specified in the SSH_ASKPASS environment variable, and dbclient
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	242 * should be run with DISPLAY set and no tty. The program should
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	243 * return the password on standard output */
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	244 #define DROPBEAR_CLI_ASKPASS_HELPER 0
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	245
1514 6c16a05023aa rename some options and move some to sysoptions.h Matt Johnston <matt@ucc.asn.au> parents: 1499 diff changeset	246 /* Save a network roundtrip by sendng a real auth request immediately after
6c16a05023aa rename some options and move some to sysoptions.h Matt Johnston <matt@ucc.asn.au> parents: 1499 diff changeset	247 * sending a query for the available methods. This is not yet enabled by default
6c16a05023aa rename some options and move some to sysoptions.h Matt Johnston <matt@ucc.asn.au> parents: 1499 diff changeset	248 since it could cause problems with non-compliant servers */
1517 7c7c5326ad73 clean up some default options Matt Johnston <matt@ucc.asn.au> parents: 1514 diff changeset	249 #define DROPBEAR_CLI_IMMEDIATE_AUTH 0
1499 2d450c1056e3 options: Complete the transition to numeric toggles (`#if') Michael Witten <mfwitten@gmail.com> parents: 1494 diff changeset	250
1514 6c16a05023aa rename some options and move some to sysoptions.h Matt Johnston <matt@ucc.asn.au> parents: 1499 diff changeset	251 /* Set this to use PRNGD or EGD instead of /dev/urandom */
1499 2d450c1056e3 options: Complete the transition to numeric toggles (`#if') Michael Witten <mfwitten@gmail.com> parents: 1494 diff changeset	252 #define DROPBEAR_USE_PRNGD 0
2d450c1056e3 options: Complete the transition to numeric toggles (`#if') Michael Witten <mfwitten@gmail.com> parents: 1494 diff changeset	253 #define DROPBEAR_PRNGD_SOCKET "/var/run/dropbear-rng"
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	254
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	255 /* Specify the number of clients we will allow to be connected but
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	256 * not yet authenticated. After this limit, connections are rejected */
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	257 /* The first setting is per-IP, to avoid denial of service */
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	258 #define MAX_UNAUTH_PER_IP 5
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	259
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	260 /* And then a global limit to avoid chewing memory if connections
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	261 * come from many IPs */
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	262 #define MAX_UNAUTH_CLIENTS 30
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	263
1445 a3a96dbf9a58 Use MAX_AUTH_TRIES rather than DEFAULT_AUTH_TRIES, don't limit argument range Matt Johnston <matt@ucc.asn.au> parents: 1442 diff changeset	264 /* Default maximum number of failed authentication tries (server option) */
a3a96dbf9a58 Use MAX_AUTH_TRIES rather than DEFAULT_AUTH_TRIES, don't limit argument range Matt Johnston <matt@ucc.asn.au> parents: 1442 diff changeset	265 /* -T server option overrides */
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	266 #define MAX_AUTH_TRIES 10
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	267
1794 ed20d805b332 Disable UNAUTH_CLOSE_DELAY by default Matt Johnston <matt@ucc.asn.au> parents: 1790 diff changeset	268 /* Delay introduced before closing an unauthenticated session (seconds).
ed20d805b332 Disable UNAUTH_CLOSE_DELAY by default Matt Johnston <matt@ucc.asn.au> parents: 1790 diff changeset	269 Disabled by default, can be set to say 30 seconds to reduce the speed
ed20d805b332 Disable UNAUTH_CLOSE_DELAY by default Matt Johnston <matt@ucc.asn.au> parents: 1790 diff changeset	270 of password brute forcing. Note that there is a risk of denial of
ed20d805b332 Disable UNAUTH_CLOSE_DELAY by default Matt Johnston <matt@ucc.asn.au> parents: 1790 diff changeset	271 service by setting this */
ed20d805b332 Disable UNAUTH_CLOSE_DELAY by default Matt Johnston <matt@ucc.asn.au> parents: 1790 diff changeset	272 #define UNAUTH_CLOSE_DELAY 0
1790 42745af83b7d Introduce extra delay before closing unauthenticated sessions Thomas De Schampheleire <thomas.de_schampheleire@nokia.com> parents: 1714 diff changeset	273
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	274 /* The default file to store the daemon's process ID, for shutdown
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	275 scripts etc. This can be overridden with the -P flag */
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	276 #define DROPBEAR_PIDFILE "/var/run/dropbear.pid"
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	277
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	278 /* The command to invoke for xauth when using X11 forwarding.
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	279 * "-q" for quiet */
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	280 #define XAUTH_COMMAND "/usr/bin/xauth -q"
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	281
1499 2d450c1056e3 options: Complete the transition to numeric toggles (`#if') Michael Witten <mfwitten@gmail.com> parents: 1494 diff changeset	282
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	283 /* if you want to enable running an sftp server (such as the one included with
1514 6c16a05023aa rename some options and move some to sysoptions.h Matt Johnston <matt@ucc.asn.au> parents: 1499 diff changeset	284 * OpenSSH), set the path below and set DROPBEAR_SFTPSERVER.
6c16a05023aa rename some options and move some to sysoptions.h Matt Johnston <matt@ucc.asn.au> parents: 1499 diff changeset	285 * The sftp-server program is not provided by Dropbear itself */
6c16a05023aa rename some options and move some to sysoptions.h Matt Johnston <matt@ucc.asn.au> parents: 1499 diff changeset	286 #define DROPBEAR_SFTPSERVER 1
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	287 #define SFTPSERVER_PATH "/usr/libexec/sftp-server"
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	288
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	289 /* This is used by the scp binary when used as a client binary. If you're
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	290 * not using the Dropbear client, you'll need to change it */
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	291 #define DROPBEAR_PATH_SSH_PROGRAM "/usr/bin/dbclient"
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	292
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	293 /* Whether to log commands executed by a client. This only logs the
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	294 * (single) command sent to the server, not what a user did in a
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	295 * shell/sftp session etc. */
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	296 #define LOG_COMMANDS 0
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	297
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	298 /* Window size limits. These tend to be a trade-off between memory
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	299 usage and network performance: */
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	300 /* Size of the network receive window. This amount of memory is allocated
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	301 as a per-channel receive buffer. Increasing this value can make a
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	302 significant difference to network performance. 24kB was empirically
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	303 chosen for a 100mbit ethernet network. The value can be altered at
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	304 runtime with the -W argument. */
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	305 #define DEFAULT_RECV_WINDOW 24576
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	306 /* Maximum size of a received SSH data packet - this _MUST_ be >= 32768
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	307 in order to interoperate with other implementations */
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	308 #define RECV_MAX_PAYLOAD_LEN 32768
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	309 /* Maximum size of a transmitted data packet - this can be any value,
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	310 though increasing it may not make a significant difference. */
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	311 #define TRANS_MAX_PAYLOAD_LEN 16384
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	312
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	313 /* Ensure that data is transmitted every KEEPALIVE seconds. This can
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	314 be overridden at runtime with -K. 0 disables keepalives */
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	315 #define DEFAULT_KEEPALIVE 0
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	316
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	317 /* If this many KEEPALIVES are sent with no packets received from the
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	318 other side, exit. Not run-time configurable - if you have a need
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	319 for runtime configuration please mail the Dropbear list */
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	320 #define DEFAULT_KEEPALIVE_LIMIT 3
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	321
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	322 /* Ensure that data is received within IDLE_TIMEOUT seconds. This can
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	323 be overridden at runtime with -I. 0 disables idle timeouts */
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	324 #define DEFAULT_IDLE_TIMEOUT 0
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	325
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	326 /* The default path. This will often get replaced by the shell */
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	327 #define DEFAULT_PATH "/usr/bin:/bin"
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	328
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	329 #endif /* DROPBEAR_DEFAULT_OPTIONS_H_ */

Mercurial > dropbear

annotate default_options.h @ 1861:2b3a8026a6ce