Mercurial > dropbear

annotate cli-kex.c @ 379:b66a00272a90

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Load hostkeys before daemon(), since daemon()'s chdir("/") will prevent us finding keys in $PWD.
author Matt Johnston <matt@ucc.asn.au>
date Thu, 04 Jan 2007 02:01:09 +0000
parents 454a34b2dfd1
children ab57ba0cb667
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1 /*
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
2 * Dropbear - a SSH2 server
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
3 *
74
e3adf4cf5465 License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents: 59
diff changeset
4 * Copyright (c) 2002-2004 Matt Johnston
e3adf4cf5465 License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents: 59
diff changeset
5 * Copyright (c) 2004 by Mihnea Stoenescu
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
6 * All rights reserved.
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
7 *
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
8 * Permission is hereby granted, free of charge, to any person obtaining a copy
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
9 * of this software and associated documentation files (the "Software"), to deal
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
10 * in the Software without restriction, including without limitation the rights
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
11 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
12 * copies of the Software, and to permit persons to whom the Software is
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
13 * furnished to do so, subject to the following conditions:
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
14 *
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
15 * The above copyright notice and this permission notice shall be included in
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
16 * all copies or substantial portions of the Software.
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
17 *
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
21 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
22 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
23 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
24 * SOFTWARE. */
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
25
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
26 #include "includes.h"
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
27 #include "session.h"
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
28 #include "dbutil.h"
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
29 #include "algo.h"
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
30 #include "buffer.h"
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
31 #include "session.h"
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
32 #include "kex.h"
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
33 #include "ssh.h"
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
34 #include "packet.h"
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
35 #include "bignum.h"
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
36 #include "random.h"
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
37 #include "runopts.h"
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
38 #include "signkey.h"
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
39
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
40
51
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
41 static void checkhostkey(unsigned char* keyblob, unsigned int keybloblen);
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
42 #define MAX_KNOWNHOSTS_LINE 4500
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
43
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
44 void send_msg_kexdh_init() {
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
45
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
46 cli_ses.dh_e = (mp_int*)m_malloc(sizeof(mp_int));
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
47 cli_ses.dh_x = (mp_int*)m_malloc(sizeof(mp_int));
84
29a5c7c62350 default initialisers for mp_ints
Matt Johnston <matt@ucc.asn.au>
parents: 80
diff changeset
48 m_mp_init_multi(cli_ses.dh_e, cli_ses.dh_x, NULL);
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
49
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
50 gen_kexdh_vals(cli_ses.dh_e, cli_ses.dh_x);
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
51
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
52 CHECKCLEARTOWRITE();
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
53 buf_putbyte(ses.writepayload, SSH_MSG_KEXDH_INIT);
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
54 buf_putmpint(ses.writepayload, cli_ses.dh_e);
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
55 encrypt_packet();
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
56 ses.requirenext = SSH_MSG_KEXDH_REPLY;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
57 }
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
58
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
59 /* Handle a diffie-hellman key exchange reply. */
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
60 void recv_msg_kexdh_reply() {
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
61
84
29a5c7c62350 default initialisers for mp_ints
Matt Johnston <matt@ucc.asn.au>
parents: 80
diff changeset
62 DEF_MP_INT(dh_f);
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
63 sign_key *hostkey = NULL;
51
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
64 unsigned int type, keybloblen;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
65 unsigned char* keyblob = NULL;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
66
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
67
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 106
diff changeset
68 TRACE(("enter recv_msg_kexdh_reply"))
84
29a5c7c62350 default initialisers for mp_ints
Matt Johnston <matt@ucc.asn.au>
parents: 80
diff changeset
69
29a5c7c62350 default initialisers for mp_ints
Matt Johnston <matt@ucc.asn.au>
parents: 80
diff changeset
70 if (cli_ses.kex_state != KEXDH_INIT_SENT) {
29a5c7c62350 default initialisers for mp_ints
Matt Johnston <matt@ucc.asn.au>
parents: 80
diff changeset
71 dropbear_exit("Received out-of-order kexdhreply");
29a5c7c62350 default initialisers for mp_ints
Matt Johnston <matt@ucc.asn.au>
parents: 80
diff changeset
72 }
29a5c7c62350 default initialisers for mp_ints
Matt Johnston <matt@ucc.asn.au>
parents: 80
diff changeset
73 m_mp_init(&dh_f);
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
74 type = ses.newkeys->algo_hostkey;
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 106
diff changeset
75 TRACE(("type is %d", type))
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
76
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
77 hostkey = new_sign_key();
51
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
78 keybloblen = buf_getint(ses.payload);
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
79
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
80 keyblob = buf_getptr(ses.payload, keybloblen);
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
81 if (!ses.kexstate.donefirstkex) {
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
82 /* Only makes sense the first time */
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
83 checkhostkey(keyblob, keybloblen);
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
84 }
34
e2a1eaa19f22 Client mostly works up to password auth
Matt Johnston <matt@ucc.asn.au>
parents: 33
diff changeset
85
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
86 if (buf_get_pub_key(ses.payload, hostkey, &type) != DROPBEAR_SUCCESS) {
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 106
diff changeset
87 TRACE(("failed getting pubkey"))
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
88 dropbear_exit("Bad KEX packet");
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
89 }
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
90
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
91 if (buf_getmpint(ses.payload, &dh_f) != DROPBEAR_SUCCESS) {
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 106
diff changeset
92 TRACE(("failed getting mpint"))
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
93 dropbear_exit("Bad KEX packet");
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
94 }
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
95
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
96 kexdh_comb_key(cli_ses.dh_e, cli_ses.dh_x, &dh_f, hostkey);
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
97 mp_clear(&dh_f);
84
29a5c7c62350 default initialisers for mp_ints
Matt Johnston <matt@ucc.asn.au>
parents: 80
diff changeset
98 mp_clear_multi(cli_ses.dh_e, cli_ses.dh_x, NULL);
29a5c7c62350 default initialisers for mp_ints
Matt Johnston <matt@ucc.asn.au>
parents: 80
diff changeset
99 m_free(cli_ses.dh_e);
29a5c7c62350 default initialisers for mp_ints
Matt Johnston <matt@ucc.asn.au>
parents: 80
diff changeset
100 m_free(cli_ses.dh_x);
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
101
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
102 if (buf_verify(ses.payload, hostkey, ses.hash, SHA1_HASH_SIZE)
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
103 != DROPBEAR_SUCCESS) {
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
104 dropbear_exit("Bad hostkey signature");
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
105 }
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
106
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
107 sign_key_free(hostkey);
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
108 hostkey = NULL;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
109
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
110 send_msg_newkeys();
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
111 ses.requirenext = SSH_MSG_NEWKEYS;
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 106
diff changeset
112 TRACE(("leave recv_msg_kexdh_init"))
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
113 }
51
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
114
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
115 static void ask_to_confirm(unsigned char* keyblob, unsigned int keybloblen) {
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
116
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
117 char* fp = NULL;
170
a62cb364f615 Read "y/n" response for fingerprints from /dev/tty directly so that dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 165
diff changeset
118 FILE *tty = NULL;
a62cb364f615 Read "y/n" response for fingerprints from /dev/tty directly so that dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 165
diff changeset
119 char response = 'z';
51
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
120
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
121 fp = sign_key_fingerprint(keyblob, keybloblen);
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
122 fprintf(stderr, "\nHost '%s' is not in the trusted hosts file.\n(fingerprint %s)\nDo you want to continue connecting? (y/n)\n",
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
123 cli_opts.remotehost,
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
124 fp);
340
454a34b2dfd1 Fixes from Erik Hovland:
Matt Johnston <matt@ucc.asn.au>
parents: 322
diff changeset
125 m_free(fp);
51
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
126
170
a62cb364f615 Read "y/n" response for fingerprints from /dev/tty directly so that dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 165
diff changeset
127 tty = fopen(_PATH_TTY, "r");
a62cb364f615 Read "y/n" response for fingerprints from /dev/tty directly so that dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 165
diff changeset
128 if (tty) {
a62cb364f615 Read "y/n" response for fingerprints from /dev/tty directly so that dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 165
diff changeset
129 response = getc(tty);
a62cb364f615 Read "y/n" response for fingerprints from /dev/tty directly so that dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 165
diff changeset
130 fclose(tty);
a62cb364f615 Read "y/n" response for fingerprints from /dev/tty directly so that dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 165
diff changeset
131 } else {
a62cb364f615 Read "y/n" response for fingerprints from /dev/tty directly so that dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 165
diff changeset
132 response = getc(stdin);
a62cb364f615 Read "y/n" response for fingerprints from /dev/tty directly so that dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 165
diff changeset
133 }
a62cb364f615 Read "y/n" response for fingerprints from /dev/tty directly so that dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 165
diff changeset
134
a62cb364f615 Read "y/n" response for fingerprints from /dev/tty directly so that dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 165
diff changeset
135 if (response == 'y') {
51
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
136 return;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
137 }
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
138
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
139 dropbear_exit("Didn't validate host key");
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
140 }
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
141
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
142 static void checkhostkey(unsigned char* keyblob, unsigned int keybloblen) {
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
143
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
144 char * filename = NULL;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
145 FILE *hostsfile = NULL;
59
bdc97a5719f4 add new entries to known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
146 int readonly = 0;
51
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
147 struct passwd *pw = NULL;
318
9916350d7d8b don't fail fatally if the client can't get homedir from getpwuid(), fallback
Matt Johnston <matt@ucc.asn.au>
parents: 170
diff changeset
148 char * homedir = NULL;
59
bdc97a5719f4 add new entries to known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
149 unsigned int hostlen, algolen;
bdc97a5719f4 add new entries to known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
150 unsigned long len;
51
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
151 const char *algoname = NULL;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
152 buffer * line = NULL;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
153 int ret;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
154
322
84aa4e60bd3c Look at HOME before /etc/passwd when looking for ~/.ssh/known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 318
diff changeset
155 homedir = getenv("HOME");
51
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
156
322
84aa4e60bd3c Look at HOME before /etc/passwd when looking for ~/.ssh/known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 318
diff changeset
157 if (!homedir) {
84aa4e60bd3c Look at HOME before /etc/passwd when looking for ~/.ssh/known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 318
diff changeset
158 pw = getpwuid(getuid());
84aa4e60bd3c Look at HOME before /etc/passwd when looking for ~/.ssh/known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 318
diff changeset
159 if (pw) {
84aa4e60bd3c Look at HOME before /etc/passwd when looking for ~/.ssh/known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 318
diff changeset
160 homedir = pw->pw_dir;
84aa4e60bd3c Look at HOME before /etc/passwd when looking for ~/.ssh/known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 318
diff changeset
161 }
84aa4e60bd3c Look at HOME before /etc/passwd when looking for ~/.ssh/known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 318
diff changeset
162 pw = NULL;
51
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
163 }
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
164
318
9916350d7d8b don't fail fatally if the client can't get homedir from getpwuid(), fallback
Matt Johnston <matt@ucc.asn.au>
parents: 170
diff changeset
165 if (homedir) {
9916350d7d8b don't fail fatally if the client can't get homedir from getpwuid(), fallback
Matt Johnston <matt@ucc.asn.au>
parents: 170
diff changeset
166
9916350d7d8b don't fail fatally if the client can't get homedir from getpwuid(), fallback
Matt Johnston <matt@ucc.asn.au>
parents: 170
diff changeset
167 len = strlen(homedir);
9916350d7d8b don't fail fatally if the client can't get homedir from getpwuid(), fallback
Matt Johnston <matt@ucc.asn.au>
parents: 170
diff changeset
168 filename = m_malloc(len + 18); /* "/.ssh/known_hosts" and null-terminator*/
51
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
169
318
9916350d7d8b don't fail fatally if the client can't get homedir from getpwuid(), fallback
Matt Johnston <matt@ucc.asn.au>
parents: 170
diff changeset
170 snprintf(filename, len+18, "%s/.ssh", homedir);
9916350d7d8b don't fail fatally if the client can't get homedir from getpwuid(), fallback
Matt Johnston <matt@ucc.asn.au>
parents: 170
diff changeset
171 /* Check that ~/.ssh exists - easiest way is just to mkdir */
9916350d7d8b don't fail fatally if the client can't get homedir from getpwuid(), fallback
Matt Johnston <matt@ucc.asn.au>
parents: 170
diff changeset
172 if (mkdir(filename, S_IRWXU) != 0) {
9916350d7d8b don't fail fatally if the client can't get homedir from getpwuid(), fallback
Matt Johnston <matt@ucc.asn.au>
parents: 170
diff changeset
173 if (errno != EEXIST) {
322
84aa4e60bd3c Look at HOME before /etc/passwd when looking for ~/.ssh/known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 318
diff changeset
174 dropbear_log(LOG_INFO, "Warning: failed creating %s/.ssh: %s",
84aa4e60bd3c Look at HOME before /etc/passwd when looking for ~/.ssh/known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 318
diff changeset
175 homedir, strerror(errno));
318
9916350d7d8b don't fail fatally if the client can't get homedir from getpwuid(), fallback
Matt Johnston <matt@ucc.asn.au>
parents: 170
diff changeset
176 TRACE(("mkdir didn't work: %s", strerror(errno)))
9916350d7d8b don't fail fatally if the client can't get homedir from getpwuid(), fallback
Matt Johnston <matt@ucc.asn.au>
parents: 170
diff changeset
177 ask_to_confirm(keyblob, keybloblen);
9916350d7d8b don't fail fatally if the client can't get homedir from getpwuid(), fallback
Matt Johnston <matt@ucc.asn.au>
parents: 170
diff changeset
178 goto out; /* only get here on success */
9916350d7d8b don't fail fatally if the client can't get homedir from getpwuid(), fallback
Matt Johnston <matt@ucc.asn.au>
parents: 170
diff changeset
179 }
51
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
180 }
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
181
318
9916350d7d8b don't fail fatally if the client can't get homedir from getpwuid(), fallback
Matt Johnston <matt@ucc.asn.au>
parents: 170
diff changeset
182 snprintf(filename, len+18, "%s/.ssh/known_hosts", homedir);
9916350d7d8b don't fail fatally if the client can't get homedir from getpwuid(), fallback
Matt Johnston <matt@ucc.asn.au>
parents: 170
diff changeset
183 hostsfile = fopen(filename, "a+");
9916350d7d8b don't fail fatally if the client can't get homedir from getpwuid(), fallback
Matt Johnston <matt@ucc.asn.au>
parents: 170
diff changeset
184
9916350d7d8b don't fail fatally if the client can't get homedir from getpwuid(), fallback
Matt Johnston <matt@ucc.asn.au>
parents: 170
diff changeset
185 if (hostsfile != NULL) {
9916350d7d8b don't fail fatally if the client can't get homedir from getpwuid(), fallback
Matt Johnston <matt@ucc.asn.au>
parents: 170
diff changeset
186 fseek(hostsfile, 0, SEEK_SET);
9916350d7d8b don't fail fatally if the client can't get homedir from getpwuid(), fallback
Matt Johnston <matt@ucc.asn.au>
parents: 170
diff changeset
187 } else {
9916350d7d8b don't fail fatally if the client can't get homedir from getpwuid(), fallback
Matt Johnston <matt@ucc.asn.au>
parents: 170
diff changeset
188 /* We mightn't have been able to open it if it was read-only */
9916350d7d8b don't fail fatally if the client can't get homedir from getpwuid(), fallback
Matt Johnston <matt@ucc.asn.au>
parents: 170
diff changeset
189 if (errno == EACCES || errno == EROFS) {
9916350d7d8b don't fail fatally if the client can't get homedir from getpwuid(), fallback
Matt Johnston <matt@ucc.asn.au>
parents: 170
diff changeset
190 TRACE(("trying readonly: %s", strerror(errno)))
9916350d7d8b don't fail fatally if the client can't get homedir from getpwuid(), fallback
Matt Johnston <matt@ucc.asn.au>
parents: 170
diff changeset
191 readonly = 1;
9916350d7d8b don't fail fatally if the client can't get homedir from getpwuid(), fallback
Matt Johnston <matt@ucc.asn.au>
parents: 170
diff changeset
192 hostsfile = fopen(filename, "r");
9916350d7d8b don't fail fatally if the client can't get homedir from getpwuid(), fallback
Matt Johnston <matt@ucc.asn.au>
parents: 170
diff changeset
193 }
106
e13f8a712a1c Fix if the first write fails
Matt Johnston <matt@ucc.asn.au>
parents: 84
diff changeset
194 }
59
bdc97a5719f4 add new entries to known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
195 }
bdc97a5719f4 add new entries to known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
196
51
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
197 if (hostsfile == NULL) {
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 106
diff changeset
198 TRACE(("hostsfile didn't open: %s", strerror(errno)))
322
84aa4e60bd3c Look at HOME before /etc/passwd when looking for ~/.ssh/known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 318
diff changeset
199 dropbear_log(LOG_WARNING, "Failed to open %s/.ssh/known_hosts",
84aa4e60bd3c Look at HOME before /etc/passwd when looking for ~/.ssh/known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 318
diff changeset
200 homedir);
51
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
201 ask_to_confirm(keyblob, keybloblen);
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
202 goto out; /* We only get here on success */
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
203 }
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
204
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
205 line = buf_new(MAX_KNOWNHOSTS_LINE);
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
206 hostlen = strlen(cli_opts.remotehost);
59
bdc97a5719f4 add new entries to known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
207 algoname = signkey_name_from_type(ses.newkeys->algo_hostkey, &algolen);
51
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
208
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
209 do {
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
210 if (buf_getline(line, hostsfile) == DROPBEAR_FAILURE) {
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 106
diff changeset
211 TRACE(("failed reading line: prob EOF"))
51
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
212 break;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
213 }
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
214
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
215 /* The line is too short to be sensible */
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
216 /* "30" is 'enough to hold ssh-dss plus the spaces, ie so we don't
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
217 * buf_getfoo() past the end and die horribly - the base64 parsing
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
218 * code is what tiptoes up to the end nicely */
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
219 if (line->len < (hostlen+30) ) {
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 106
diff changeset
220 TRACE(("line is too short to be sensible"))
51
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
221 continue;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
222 }
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
223
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
224 /* Compare hostnames */
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
225 if (strncmp(cli_opts.remotehost, buf_getptr(line, hostlen),
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
226 hostlen) != 0) {
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 106
diff changeset
227 TRACE(("hosts don't match"))
51
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
228 continue;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
229 }
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
230
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
231 buf_incrpos(line, hostlen);
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
232 if (buf_getbyte(line) != ' ') {
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
233 /* there wasn't a space after the hostname, something dodgy */
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 106
diff changeset
234 TRACE(("missing space afte matching hostname"))
51
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
235 continue;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
236 }
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
237
59
bdc97a5719f4 add new entries to known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
238 if ( strncmp(buf_getptr(line, algolen), algoname, algolen) != 0) {
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 106
diff changeset
239 TRACE(("algo doesn't match"))
51
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
240 continue;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
241 }
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
242
59
bdc97a5719f4 add new entries to known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
243 buf_incrpos(line, algolen);
51
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
244 if (buf_getbyte(line) != ' ') {
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 106
diff changeset
245 TRACE(("missing space after algo"))
51
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
246 continue;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
247 }
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
248
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
249 /* Now we're at the interesting hostkey */
59
bdc97a5719f4 add new entries to known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
250 ret = cmp_base64_key(keyblob, keybloblen, algoname, algolen, line);
51
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
251
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
252 if (ret == DROPBEAR_SUCCESS) {
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
253 /* Good matching key */
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 106
diff changeset
254 TRACE(("good matching key"))
51
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
255 goto out;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
256 }
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
257
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
258 /* The keys didn't match. eep. */
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
259 } while (1); /* keep going 'til something happens */
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
260
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
261 /* Key doesn't exist yet */
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
262 ask_to_confirm(keyblob, keybloblen);
59
bdc97a5719f4 add new entries to known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
263
51
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
264 /* If we get here, they said yes */
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
265
59
bdc97a5719f4 add new entries to known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
266 if (readonly) {
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 106
diff changeset
267 TRACE(("readonly"))
59
bdc97a5719f4 add new entries to known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
268 goto out;
bdc97a5719f4 add new entries to known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
269 }
bdc97a5719f4 add new entries to known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
270
bdc97a5719f4 add new entries to known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
271 /* put the new entry in the file */
80
07bcdccb3577 create known_hosts properly
Matt Johnston <matt@ucc.asn.au>
parents: 79
diff changeset
272 fseek(hostsfile, 0, SEEK_END); /* In case it wasn't opened append */
59
bdc97a5719f4 add new entries to known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
273 buf_setpos(line, 0);
bdc97a5719f4 add new entries to known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
274 buf_setlen(line, 0);
bdc97a5719f4 add new entries to known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
275 buf_putbytes(line, ses.remotehost, hostlen);
bdc97a5719f4 add new entries to known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
276 buf_putbyte(line, ' ');
bdc97a5719f4 add new entries to known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
277 buf_putbytes(line, algoname, algolen);
bdc97a5719f4 add new entries to known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
278 buf_putbyte(line, ' ');
bdc97a5719f4 add new entries to known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
279 len = line->size - line->pos;
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 106
diff changeset
280 TRACE(("keybloblen %d, len %d", keybloblen, len))
59
bdc97a5719f4 add new entries to known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
281 /* The only failure with base64 is buffer_overflow, but buf_getwriteptr
bdc97a5719f4 add new entries to known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
282 * will die horribly in the case anyway */
bdc97a5719f4 add new entries to known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
283 base64_encode(keyblob, keybloblen, buf_getwriteptr(line, len), &len);
bdc97a5719f4 add new entries to known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
284 buf_incrwritepos(line, len);
bdc97a5719f4 add new entries to known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
285 buf_putbyte(line, '\n');
bdc97a5719f4 add new entries to known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
286 buf_setpos(line, 0);
bdc97a5719f4 add new entries to known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
287 fwrite(buf_getptr(line, line->len), line->len, 1, hostsfile);
bdc97a5719f4 add new entries to known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
288 /* We ignore errors, since there's not much we can do about them */
bdc97a5719f4 add new entries to known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
289
51
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
290 out:
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
291 if (hostsfile != NULL) {
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
292 fclose(hostsfile);
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
293 }
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
294 m_free(filename);
79
5a55bd66707f - don't crash when trying to add to known_hosts if it doesn't exist
Matt Johnston <matt@ucc.asn.au>
parents: 74
diff changeset
295 if (line != NULL) {
5a55bd66707f - don't crash when trying to add to known_hosts if it doesn't exist
Matt Johnston <matt@ucc.asn.au>
parents: 74
diff changeset
296 buf_free(line);
5a55bd66707f - don't crash when trying to add to known_hosts if it doesn't exist
Matt Johnston <matt@ucc.asn.au>
parents: 74
diff changeset
297 }
51
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
298 }