annotate cli-kex.c @ 158:364a75cfebab

Log the IP along with auth success/fail attempts
author Matt Johnston <matt@ucc.asn.au>
date Thu, 23 Dec 2004 17:00:15 +0000
parents e13f8a712a1c
children 0cfba3034be5
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26
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1 /*
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2 * Dropbear - a SSH2 server
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3 *
74
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4 * Copyright (c) 2002-2004 Matt Johnston
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5 * Copyright (c) 2004 by Mihnea Stoenescu
26
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6 * All rights reserved.
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7 *
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8 * Permission is hereby granted, free of charge, to any person obtaining a copy
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9 * of this software and associated documentation files (the "Software"), to deal
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10 * in the Software without restriction, including without limitation the rights
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11 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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12 * copies of the Software, and to permit persons to whom the Software is
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13 * furnished to do so, subject to the following conditions:
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14 *
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15 * The above copyright notice and this permission notice shall be included in
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16 * all copies or substantial portions of the Software.
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17 *
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18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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21 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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22 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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23 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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24 * SOFTWARE. */
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25
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26 #include "includes.h"
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27 #include "session.h"
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28 #include "dbutil.h"
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29 #include "algo.h"
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30 #include "buffer.h"
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31 #include "session.h"
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32 #include "kex.h"
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33 #include "ssh.h"
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34 #include "packet.h"
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35 #include "bignum.h"
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36 #include "random.h"
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37 #include "runopts.h"
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38 #include "signkey.h"
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40
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41 static void checkhostkey(unsigned char* keyblob, unsigned int keybloblen);
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42 #define MAX_KNOWNHOSTS_LINE 4500
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43
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44 void send_msg_kexdh_init() {
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45
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46 cli_ses.dh_e = (mp_int*)m_malloc(sizeof(mp_int));
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47 cli_ses.dh_x = (mp_int*)m_malloc(sizeof(mp_int));
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48 m_mp_init_multi(cli_ses.dh_e, cli_ses.dh_x, NULL);
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49
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50 gen_kexdh_vals(cli_ses.dh_e, cli_ses.dh_x);
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51
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52 CHECKCLEARTOWRITE();
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53 buf_putbyte(ses.writepayload, SSH_MSG_KEXDH_INIT);
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54 buf_putmpint(ses.writepayload, cli_ses.dh_e);
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55 encrypt_packet();
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56 ses.requirenext = SSH_MSG_KEXDH_REPLY;
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57 }
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58
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59 /* Handle a diffie-hellman key exchange reply. */
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60 void recv_msg_kexdh_reply() {
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61
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62 DEF_MP_INT(dh_f);
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63 sign_key *hostkey = NULL;
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64 unsigned int type, keybloblen;
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65 unsigned char* keyblob = NULL;
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66
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68 TRACE(("enter recv_msg_kexdh_reply"));
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69
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70 if (cli_ses.kex_state != KEXDH_INIT_SENT) {
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71 dropbear_exit("Received out-of-order kexdhreply");
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72 }
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73 m_mp_init(&dh_f);
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74 type = ses.newkeys->algo_hostkey;
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75 TRACE(("type is %d", type));
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76
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77 hostkey = new_sign_key();
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78 keybloblen = buf_getint(ses.payload);
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80 keyblob = buf_getptr(ses.payload, keybloblen);
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81 if (!ses.kexstate.donefirstkex) {
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82 /* Only makes sense the first time */
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83 checkhostkey(keyblob, keybloblen);
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84 }
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85
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86 if (buf_get_pub_key(ses.payload, hostkey, &type) != DROPBEAR_SUCCESS) {
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87 TRACE(("failed getting pubkey"));
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88 dropbear_exit("Bad KEX packet");
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89 }
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90
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91 if (buf_getmpint(ses.payload, &dh_f) != DROPBEAR_SUCCESS) {
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92 TRACE(("failed getting mpint"));
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93 dropbear_exit("Bad KEX packet");
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94 }
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95
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96 kexdh_comb_key(cli_ses.dh_e, cli_ses.dh_x, &dh_f, hostkey);
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97 mp_clear(&dh_f);
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98 mp_clear_multi(cli_ses.dh_e, cli_ses.dh_x, NULL);
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99 m_free(cli_ses.dh_e);
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100 m_free(cli_ses.dh_x);
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101
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102 if (buf_verify(ses.payload, hostkey, ses.hash, SHA1_HASH_SIZE)
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103 != DROPBEAR_SUCCESS) {
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104 dropbear_exit("Bad hostkey signature");
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105 }
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106
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107 sign_key_free(hostkey);
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108 hostkey = NULL;
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109
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110 send_msg_newkeys();
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111 ses.requirenext = SSH_MSG_NEWKEYS;
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112 TRACE(("leave recv_msg_kexdh_init"));
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113 }
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114
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115 static void ask_to_confirm(unsigned char* keyblob, unsigned int keybloblen) {
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116
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117 char* fp = NULL;
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118
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119 fp = sign_key_fingerprint(keyblob, keybloblen);
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120 fprintf(stderr, "\nHost '%s' is not in the trusted hosts file.\n(fingerprint %s)\nDo you want to continue connecting? (y/n)\n",
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121 cli_opts.remotehost,
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122 fp);
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123
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124 if (getc(stdin) == 'y') {
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125 m_free(fp);
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126 return;
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127 }
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128
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129 dropbear_exit("Didn't validate host key");
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130 }
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131
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132 static void checkhostkey(unsigned char* keyblob, unsigned int keybloblen) {
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133
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134 char * filename = NULL;
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135 FILE *hostsfile = NULL;
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136 int readonly = 0;
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137 struct passwd *pw = NULL;
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138 unsigned int hostlen, algolen;
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139 unsigned long len;
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140 const char *algoname = NULL;
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141 buffer * line = NULL;
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142 int ret;
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143
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144 pw = getpwuid(getuid());
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145
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146 if (pw == NULL) {
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147 dropbear_exit("Failed to get homedir");
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148 }
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149
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150 len = strlen(pw->pw_dir);
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151 filename = m_malloc(len + 18); /* "/.ssh/known_hosts" and null-terminator*/
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152
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Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
153 snprintf(filename, len+18, "%s/.ssh", pw->pw_dir);
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
154 /* Check that ~/.ssh exists - easiest way is just to mkdir */
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
155 if (mkdir(filename, S_IRWXU) != 0) {
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
156 if (errno != EEXIST) {
80
07bcdccb3577 create known_hosts properly
Matt Johnston <matt@ucc.asn.au>
parents: 79
diff changeset
157 dropbear_log(LOG_INFO, "Warning: failed creating ~/.ssh: %s",
07bcdccb3577 create known_hosts properly
Matt Johnston <matt@ucc.asn.au>
parents: 79
diff changeset
158 strerror(errno));
07bcdccb3577 create known_hosts properly
Matt Johnston <matt@ucc.asn.au>
parents: 79
diff changeset
159 TRACE(("mkdir didn't work: %s", strerror(errno)));
51
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
160 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
161 goto out; /* 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
162 }
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
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
165 snprintf(filename, len+18, "%s/.ssh/known_hosts", pw->pw_dir);
80
07bcdccb3577 create known_hosts properly
Matt Johnston <matt@ucc.asn.au>
parents: 79
diff changeset
166 hostsfile = fopen(filename, "a+");
59
bdc97a5719f4 add new entries to known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
167
106
e13f8a712a1c Fix if the first write fails
Matt Johnston <matt@ucc.asn.au>
parents: 84
diff changeset
168 if (hostsfile != NULL) {
e13f8a712a1c Fix if the first write fails
Matt Johnston <matt@ucc.asn.au>
parents: 84
diff changeset
169 fseek(hostsfile, 0, SEEK_SET);
e13f8a712a1c Fix if the first write fails
Matt Johnston <matt@ucc.asn.au>
parents: 84
diff changeset
170 } else {
e13f8a712a1c Fix if the first write fails
Matt Johnston <matt@ucc.asn.au>
parents: 84
diff changeset
171 /* We mightn't have been able to open it if it was read-only */
e13f8a712a1c Fix if the first write fails
Matt Johnston <matt@ucc.asn.au>
parents: 84
diff changeset
172 if (errno == EACCES || errno == EROFS) {
e13f8a712a1c Fix if the first write fails
Matt Johnston <matt@ucc.asn.au>
parents: 84
diff changeset
173 TRACE(("trying readonly: %s", strerror(errno)));
e13f8a712a1c Fix if the first write fails
Matt Johnston <matt@ucc.asn.au>
parents: 84
diff changeset
174 readonly = 1;
e13f8a712a1c Fix if the first write fails
Matt Johnston <matt@ucc.asn.au>
parents: 84
diff changeset
175 hostsfile = fopen(filename, "r");
e13f8a712a1c Fix if the first write fails
Matt Johnston <matt@ucc.asn.au>
parents: 84
diff changeset
176 }
59
bdc97a5719f4 add new entries to known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
177 }
bdc97a5719f4 add new entries to known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
178
51
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
179 if (hostsfile == NULL) {
80
07bcdccb3577 create known_hosts properly
Matt Johnston <matt@ucc.asn.au>
parents: 79
diff changeset
180 TRACE(("hostsfile didn't open: %s", strerror(errno)));
51
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
181 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
182 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
183 }
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
184
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
185 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
186 hostlen = strlen(cli_opts.remotehost);
59
bdc97a5719f4 add new entries to known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
187 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
188
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
189 do {
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
190 if (buf_getline(line, hostsfile) == DROPBEAR_FAILURE) {
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
191 TRACE(("failed reading line: prob EOF"));
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
192 break;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
193 }
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
194
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
195 /* 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
196 /* "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
197 * 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
198 * 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
199 if (line->len < (hostlen+30) ) {
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
200 TRACE(("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
201 continue;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
202 }
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 /* Compare hostnames */
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
205 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
206 hostlen) != 0) {
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
207 TRACE(("hosts don't match"));
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
208 continue;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
209 }
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
210
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
211 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
212 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
213 /* there wasn't a space after the hostname, something dodgy */
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
214 TRACE(("missing space afte matching hostname"));
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
215 continue;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
216 }
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
217
59
bdc97a5719f4 add new entries to known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
218 if ( strncmp(buf_getptr(line, algolen), algoname, algolen) != 0) {
51
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
219 TRACE(("algo doesn't match"));
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
220 continue;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
221 }
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
222
59
bdc97a5719f4 add new entries to known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
223 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
224 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
225 TRACE(("missing space after algo"));
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
226 continue;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
227 }
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
228
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
229 /* 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
230 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
231
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
232 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
233 /* Good matching key */
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
234 TRACE(("good matching key"));
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
235 goto out;
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
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
238 /* 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
239 } 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
240
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
241 /* 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
242 ask_to_confirm(keyblob, keybloblen);
59
bdc97a5719f4 add new entries to known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
243
51
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
244 /* 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
245
59
bdc97a5719f4 add new entries to known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
246 if (readonly) {
80
07bcdccb3577 create known_hosts properly
Matt Johnston <matt@ucc.asn.au>
parents: 79
diff changeset
247 TRACE(("readonly"));
59
bdc97a5719f4 add new entries to known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
248 goto out;
bdc97a5719f4 add new entries to known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
249 }
bdc97a5719f4 add new entries to known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
250
bdc97a5719f4 add new entries to known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
251 /* put the new entry in the file */
80
07bcdccb3577 create known_hosts properly
Matt Johnston <matt@ucc.asn.au>
parents: 79
diff changeset
252 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
253 buf_setpos(line, 0);
bdc97a5719f4 add new entries to known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
254 buf_setlen(line, 0);
bdc97a5719f4 add new entries to known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
255 buf_putbytes(line, ses.remotehost, hostlen);
bdc97a5719f4 add new entries to known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
256 buf_putbyte(line, ' ');
bdc97a5719f4 add new entries to known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
257 buf_putbytes(line, algoname, algolen);
bdc97a5719f4 add new entries to known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
258 buf_putbyte(line, ' ');
bdc97a5719f4 add new entries to known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
259 len = line->size - line->pos;
bdc97a5719f4 add new entries to known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
260 TRACE(("keybloblen %d, len %d", keybloblen, len));
bdc97a5719f4 add new entries to known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
261 /* 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
262 * will die horribly in the case anyway */
bdc97a5719f4 add new entries to known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
263 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
264 buf_incrwritepos(line, len);
bdc97a5719f4 add new entries to known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
265 buf_putbyte(line, '\n');
bdc97a5719f4 add new entries to known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
266 buf_setpos(line, 0);
bdc97a5719f4 add new entries to known_hosts
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
267 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
268 /* 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
269
51
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
270 out:
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
271 if (hostsfile != NULL) {
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
272 fclose(hostsfile);
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
273 }
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
274 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
275 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
276 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
277 }
51
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
278 }