Mercurial > dropbear

annotate svr-auth.c @ 1534:ed930fd6f60f

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Added the -G option to allow logins only for users that are members of a certain group. This allows finer control of an instance on who can and cannot login over a certain instance (e.g. password and not key). Needs double-checking and ensuring it meets platform requirements.
author stellarpower <stellarpower@googlemail.com>
date Tue, 20 Feb 2018 02:11:55 +0000
parents 06d52bcb8094
children 6a83b1944432
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 /*
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2 * Dropbear - a SSH2 server
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3 *
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4 * Copyright (c) 2002,2003 Matt Johnston
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5 * All rights reserved.
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6 *
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7 * Permission is hereby granted, free of charge, to any person obtaining a copy
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8 * of this software and associated documentation files (the "Software"), to deal
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9 * in the Software without restriction, including without limitation the rights
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10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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11 * copies of the Software, and to permit persons to whom the Software is
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12 * furnished to do so, subject to the following conditions:
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13 *
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14 * The above copyright notice and this permission notice shall be included in
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15 * all copies or substantial portions of the Software.
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16 *
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17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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20 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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23 * SOFTWARE. */
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24
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25 /* This file (auth.c) handles authentication requests, passing it to the
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26 * particular type (auth-passwd, auth-pubkey). */
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27
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28 #include <limits.h>
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29
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30 #include "includes.h"
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31 #include "dbutil.h"
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32 #include "session.h"
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33 #include "buffer.h"
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34 #include "ssh.h"
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35 #include "packet.h"
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36 #include "auth.h"
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37 #include "runopts.h"
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38 #include "dbrandom.h"
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39
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40 static void authclear(void);
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41 static int checkusername(char *username, unsigned int userlen);
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42
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43 /* initialise the first time for a session, resetting all parameters */
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44 void svr_authinitialise() {
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46 ses.authstate.failcount = 0;
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47 ses.authstate.pw_name = NULL;
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48 ses.authstate.pw_dir = NULL;
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49 ses.authstate.pw_shell = NULL;
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50 ses.authstate.pw_passwd = NULL;
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51 authclear();
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53 }
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55 /* Reset the auth state, but don't reset the failcount. This is for if the
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56 * user decides to try with a different username etc, and is also invoked
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57 * on initialisation */
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58 static void authclear() {
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59
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60 memset(&ses.authstate, 0, sizeof(ses.authstate));
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61 #if DROPBEAR_SVR_PUBKEY_AUTH
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62 ses.authstate.authtypes |= AUTH_TYPE_PUBKEY;
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63 #endif
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64 #if DROPBEAR_SVR_PASSWORD_AUTH || DROPBEAR_SVR_PAM_AUTH
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65 if (!svr_opts.noauthpass) {
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66 ses.authstate.authtypes |= AUTH_TYPE_PASSWORD;
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67 }
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68 #endif
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69 if (ses.authstate.pw_name) {
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70 m_free(ses.authstate.pw_name);
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71 }
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72 if (ses.authstate.pw_shell) {
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73 m_free(ses.authstate.pw_shell);
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74 }
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75 if (ses.authstate.pw_dir) {
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76 m_free(ses.authstate.pw_dir);
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77 }
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78 if (ses.authstate.pw_passwd) {
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79 m_free(ses.authstate.pw_passwd);
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80 }
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81
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82 }
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83
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84 /* Send a banner message if specified to the client. The client might
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85 * ignore this, but possibly serves as a legal "no trespassing" sign */
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86 void send_msg_userauth_banner(const buffer *banner) {
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87
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88 TRACE(("enter send_msg_userauth_banner"))
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90 CHECKCLEARTOWRITE();
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91
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92 buf_putbyte(ses.writepayload, SSH_MSG_USERAUTH_BANNER);
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93 buf_putbufstring(ses.writepayload, banner);
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94 buf_putstring(ses.writepayload, "en", 2);
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95
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96 encrypt_packet();
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97
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98 TRACE(("leave send_msg_userauth_banner"))
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99 }
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100
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101 /* handle a userauth request, check validity, pass to password or pubkey
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102 * checking, and handle success or failure */
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103 void recv_msg_userauth_request() {
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104
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105 char *username = NULL, *servicename = NULL, *methodname = NULL;
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106 unsigned int userlen, servicelen, methodlen;
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107 int valid_user = 0;
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108
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109 TRACE(("enter recv_msg_userauth_request"))
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110
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111 /* ignore packets if auth is already done */
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112 if (ses.authstate.authdone == 1) {
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113 TRACE(("leave recv_msg_userauth_request: authdone already"))
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114 return;
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115 }
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116
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117 /* send the banner if it exists, it will only exist once */
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118 if (svr_opts.banner) {
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119 send_msg_userauth_banner(svr_opts.banner);
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120 buf_free(svr_opts.banner);
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121 svr_opts.banner = NULL;
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122 }
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123
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124 username = buf_getstring(ses.payload, &userlen);
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125 servicename = buf_getstring(ses.payload, &servicelen);
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126 methodname = buf_getstring(ses.payload, &methodlen);
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127
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128 /* only handle 'ssh-connection' currently */
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129 if (servicelen != SSH_SERVICE_CONNECTION_LEN
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130 && (strncmp(servicename, SSH_SERVICE_CONNECTION,
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131 SSH_SERVICE_CONNECTION_LEN) != 0)) {
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132
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133 /* TODO - disconnect here */
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134 m_free(username);
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135 m_free(servicename);
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136 m_free(methodname);
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137 dropbear_exit("unknown service in auth");
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138 }
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139
808
d7784616409a improve auth failure delays to avoid indicating which users exist
Matt Johnston <matt@ucc.asn.au>
parents: 782
diff changeset
140 /* check username is good before continuing.
d7784616409a improve auth failure delays to avoid indicating which users exist
Matt Johnston <matt@ucc.asn.au>
parents: 782
diff changeset
141 * the 'incrfail' varies depending on the auth method to
d7784616409a improve auth failure delays to avoid indicating which users exist
Matt Johnston <matt@ucc.asn.au>
parents: 782
diff changeset
142 * avoid giving away which users exist on the system through
d7784616409a improve auth failure delays to avoid indicating which users exist
Matt Johnston <matt@ucc.asn.au>
parents: 782
diff changeset
143 * the time delay. */
d7784616409a improve auth failure delays to avoid indicating which users exist
Matt Johnston <matt@ucc.asn.au>
parents: 782
diff changeset
144 if (checkusername(username, userlen) == DROPBEAR_SUCCESS) {
d7784616409a improve auth failure delays to avoid indicating which users exist
Matt Johnston <matt@ucc.asn.au>
parents: 782
diff changeset
145 valid_user = 1;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
146 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
147
676
0edf08895a33 Return immediate success for blank passwords if allowed
Matt Johnston <matt@ucc.asn.au>
parents: 628
diff changeset
148 /* user wants to know what methods are supported */
0edf08895a33 Return immediate success for blank passwords if allowed
Matt Johnston <matt@ucc.asn.au>
parents: 628
diff changeset
149 if (methodlen == AUTH_METHOD_NONE_LEN &&
0edf08895a33 Return immediate success for blank passwords if allowed
Matt Johnston <matt@ucc.asn.au>
parents: 628
diff changeset
150 strncmp(methodname, AUTH_METHOD_NONE,
0edf08895a33 Return immediate success for blank passwords if allowed
Matt Johnston <matt@ucc.asn.au>
parents: 628
diff changeset
151 AUTH_METHOD_NONE_LEN) == 0) {
0edf08895a33 Return immediate success for blank passwords if allowed
Matt Johnston <matt@ucc.asn.au>
parents: 628
diff changeset
152 TRACE(("recv_msg_userauth_request: 'none' request"))
808
d7784616409a improve auth failure delays to avoid indicating which users exist
Matt Johnston <matt@ucc.asn.au>
parents: 782
diff changeset
153 if (valid_user
d7784616409a improve auth failure delays to avoid indicating which users exist
Matt Johnston <matt@ucc.asn.au>
parents: 782
diff changeset
154 && svr_opts.allowblankpass
692
c58a15983808 Allow configuring "allow blank password option" at runtime
Paul Eggleton <paul.eggleton@linux.intel.com>
parents: 678
diff changeset
155 && !svr_opts.noauthpass
676
0edf08895a33 Return immediate success for blank passwords if allowed
Matt Johnston <matt@ucc.asn.au>
parents: 628
diff changeset
156 && !(svr_opts.norootpass && ses.authstate.pw_uid == 0)
677
55b84e59aaad Fix empty password immediate login
Matt Johnston <matt@ucc.asn.au>
parents: 676
diff changeset
157 && ses.authstate.pw_passwd[0] == '\0')
676
0edf08895a33 Return immediate success for blank passwords if allowed
Matt Johnston <matt@ucc.asn.au>
parents: 628
diff changeset
158 {
0edf08895a33 Return immediate success for blank passwords if allowed
Matt Johnston <matt@ucc.asn.au>
parents: 628
diff changeset
159 dropbear_log(LOG_NOTICE,
0edf08895a33 Return immediate success for blank passwords if allowed
Matt Johnston <matt@ucc.asn.au>
parents: 628
diff changeset
160 "Auth succeeded with blank password for '%s' from %s",
0edf08895a33 Return immediate success for blank passwords if allowed
Matt Johnston <matt@ucc.asn.au>
parents: 628
diff changeset
161 ses.authstate.pw_name,
0edf08895a33 Return immediate success for blank passwords if allowed
Matt Johnston <matt@ucc.asn.au>
parents: 628
diff changeset
162 svr_ses.addrstring);
0edf08895a33 Return immediate success for blank passwords if allowed
Matt Johnston <matt@ucc.asn.au>
parents: 628
diff changeset
163 send_msg_userauth_success();
0edf08895a33 Return immediate success for blank passwords if allowed
Matt Johnston <matt@ucc.asn.au>
parents: 628
diff changeset
164 goto out;
0edf08895a33 Return immediate success for blank passwords if allowed
Matt Johnston <matt@ucc.asn.au>
parents: 628
diff changeset
165 }
0edf08895a33 Return immediate success for blank passwords if allowed
Matt Johnston <matt@ucc.asn.au>
parents: 628
diff changeset
166 else
0edf08895a33 Return immediate success for blank passwords if allowed
Matt Johnston <matt@ucc.asn.au>
parents: 628
diff changeset
167 {
808
d7784616409a improve auth failure delays to avoid indicating which users exist
Matt Johnston <matt@ucc.asn.au>
parents: 782
diff changeset
168 /* 'none' has no failure delay */
676
0edf08895a33 Return immediate success for blank passwords if allowed
Matt Johnston <matt@ucc.asn.au>
parents: 628
diff changeset
169 send_msg_userauth_failure(0, 0);
0edf08895a33 Return immediate success for blank passwords if allowed
Matt Johnston <matt@ucc.asn.au>
parents: 628
diff changeset
170 goto out;
0edf08895a33 Return immediate success for blank passwords if allowed
Matt Johnston <matt@ucc.asn.au>
parents: 628
diff changeset
171 }
0edf08895a33 Return immediate success for blank passwords if allowed
Matt Johnston <matt@ucc.asn.au>
parents: 628
diff changeset
172 }
0edf08895a33 Return immediate success for blank passwords if allowed
Matt Johnston <matt@ucc.asn.au>
parents: 628
diff changeset
173
1295
750ec4ec4cbe Convert #ifdef to #if, other build changes
Matt Johnston <matt@ucc.asn.au>
parents: 1276
diff changeset
174 #if DROPBEAR_SVR_PASSWORD_AUTH
24
469950e86d0f switching to global vars
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
175 if (!svr_opts.noauthpass &&
464
4317be8b7cf9 Make a copy of passwd fields since getpwnam()'s retval isn't safe to keep
Matt Johnston <matt@ucc.asn.au>
parents: 454
diff changeset
176 !(svr_opts.norootpass && ses.authstate.pw_uid == 0) ) {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
177 /* user wants to try password auth */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
178 if (methodlen == AUTH_METHOD_PASSWORD_LEN &&
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
179 strncmp(methodname, AUTH_METHOD_PASSWORD,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
180 AUTH_METHOD_PASSWORD_LEN) == 0) {
808
d7784616409a improve auth failure delays to avoid indicating which users exist
Matt Johnston <matt@ucc.asn.au>
parents: 782
diff changeset
181 if (valid_user) {
d7784616409a improve auth failure delays to avoid indicating which users exist
Matt Johnston <matt@ucc.asn.au>
parents: 782
diff changeset
182 svr_auth_password();
d7784616409a improve auth failure delays to avoid indicating which users exist
Matt Johnston <matt@ucc.asn.au>
parents: 782
diff changeset
183 goto out;
d7784616409a improve auth failure delays to avoid indicating which users exist
Matt Johnston <matt@ucc.asn.au>
parents: 782
diff changeset
184 }
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
185 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
186 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
187 #endif
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
188
1295
750ec4ec4cbe Convert #ifdef to #if, other build changes
Matt Johnston <matt@ucc.asn.au>
parents: 1276
diff changeset
189 #if DROPBEAR_SVR_PAM_AUTH
57
3b2a5a1c4347 svr-authpam code merged and works. needs tidying a log
Matt Johnston <matt@ucc.asn.au>
parents: 35
diff changeset
190 if (!svr_opts.noauthpass &&
464
4317be8b7cf9 Make a copy of passwd fields since getpwnam()'s retval isn't safe to keep
Matt Johnston <matt@ucc.asn.au>
parents: 454
diff changeset
191 !(svr_opts.norootpass && ses.authstate.pw_uid == 0) ) {
57
3b2a5a1c4347 svr-authpam code merged and works. needs tidying a log
Matt Johnston <matt@ucc.asn.au>
parents: 35
diff changeset
192 /* user wants to try password auth */
3b2a5a1c4347 svr-authpam code merged and works. needs tidying a log
Matt Johnston <matt@ucc.asn.au>
parents: 35
diff changeset
193 if (methodlen == AUTH_METHOD_PASSWORD_LEN &&
3b2a5a1c4347 svr-authpam code merged and works. needs tidying a log
Matt Johnston <matt@ucc.asn.au>
parents: 35
diff changeset
194 strncmp(methodname, AUTH_METHOD_PASSWORD,
3b2a5a1c4347 svr-authpam code merged and works. needs tidying a log
Matt Johnston <matt@ucc.asn.au>
parents: 35
diff changeset
195 AUTH_METHOD_PASSWORD_LEN) == 0) {
808
d7784616409a improve auth failure delays to avoid indicating which users exist
Matt Johnston <matt@ucc.asn.au>
parents: 782
diff changeset
196 if (valid_user) {
d7784616409a improve auth failure delays to avoid indicating which users exist
Matt Johnston <matt@ucc.asn.au>
parents: 782
diff changeset
197 svr_auth_pam();
d7784616409a improve auth failure delays to avoid indicating which users exist
Matt Johnston <matt@ucc.asn.au>
parents: 782
diff changeset
198 goto out;
d7784616409a improve auth failure delays to avoid indicating which users exist
Matt Johnston <matt@ucc.asn.au>
parents: 782
diff changeset
199 }
57
3b2a5a1c4347 svr-authpam code merged and works. needs tidying a log
Matt Johnston <matt@ucc.asn.au>
parents: 35
diff changeset
200 }
3b2a5a1c4347 svr-authpam code merged and works. needs tidying a log
Matt Johnston <matt@ucc.asn.au>
parents: 35
diff changeset
201 }
3b2a5a1c4347 svr-authpam code merged and works. needs tidying a log
Matt Johnston <matt@ucc.asn.au>
parents: 35
diff changeset
202 #endif
3b2a5a1c4347 svr-authpam code merged and works. needs tidying a log
Matt Johnston <matt@ucc.asn.au>
parents: 35
diff changeset
203
1295
750ec4ec4cbe Convert #ifdef to #if, other build changes
Matt Johnston <matt@ucc.asn.au>
parents: 1276
diff changeset
204 #if DROPBEAR_SVR_PUBKEY_AUTH
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
205 /* user wants to try pubkey auth */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
206 if (methodlen == AUTH_METHOD_PUBKEY_LEN &&
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
207 strncmp(methodname, AUTH_METHOD_PUBKEY,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
208 AUTH_METHOD_PUBKEY_LEN) == 0) {
808
d7784616409a improve auth failure delays to avoid indicating which users exist
Matt Johnston <matt@ucc.asn.au>
parents: 782
diff changeset
209 if (valid_user) {
d7784616409a improve auth failure delays to avoid indicating which users exist
Matt Johnston <matt@ucc.asn.au>
parents: 782
diff changeset
210 svr_auth_pubkey();
d7784616409a improve auth failure delays to avoid indicating which users exist
Matt Johnston <matt@ucc.asn.au>
parents: 782
diff changeset
211 } else {
d7784616409a improve auth failure delays to avoid indicating which users exist
Matt Johnston <matt@ucc.asn.au>
parents: 782
diff changeset
212 /* pubkey has no failure delay */
d7784616409a improve auth failure delays to avoid indicating which users exist
Matt Johnston <matt@ucc.asn.au>
parents: 782
diff changeset
213 send_msg_userauth_failure(0, 0);
d7784616409a improve auth failure delays to avoid indicating which users exist
Matt Johnston <matt@ucc.asn.au>
parents: 782
diff changeset
214 }
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
215 goto out;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
216 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
217 #endif
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
218
808
d7784616409a improve auth failure delays to avoid indicating which users exist
Matt Johnston <matt@ucc.asn.au>
parents: 782
diff changeset
219 /* nothing matched, we just fail with a delay */
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
220 send_msg_userauth_failure(0, 1);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
221
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
222 out:
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
223
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
224 m_free(username);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
225 m_free(servicename);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
226 m_free(methodname);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
227 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
228
464
4317be8b7cf9 Make a copy of passwd fields since getpwnam()'s retval isn't safe to keep
Matt Johnston <matt@ucc.asn.au>
parents: 454
diff changeset
229
676
0edf08895a33 Return immediate success for blank passwords if allowed
Matt Johnston <matt@ucc.asn.au>
parents: 628
diff changeset
230 /* Check that the username exists and isn't disallowed (root), and has a valid shell.
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
231 * returns DROPBEAR_SUCCESS on valid username, DROPBEAR_FAILURE on failure */
1100
7b84c3492a95 Turn username, servicename and methodname local variables into char *
Gaël PORTAY <gael.portay@gmail.com>
parents: 1094
diff changeset
232 static int checkusername(char *username, unsigned int userlen) {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
233
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
234 char* listshell = NULL;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
235 char* usershell = NULL;
852
7540c0822374 Various cleanups and fixes for warnings
Matt Johnston <matt@ucc.asn.au>
parents: 835
diff changeset
236 uid_t uid;
1534
ed930fd6f60f Added the -G option to allow logins only for users that are members of a certain group. This allows finer control of an instance on who can and cannot login over a certain instance (e.g. password and not key). Needs double-checking and ensuring it meets platform requirements.
stellarpower <stellarpower@googlemail.com>
parents: 1459
diff changeset
237 int ngroups = 32, ret;
ed930fd6f60f Added the -G option to allow logins only for users that are members of a certain group. This allows finer control of an instance on who can and cannot login over a certain instance (e.g. password and not key). Needs double-checking and ensuring it meets platform requirements.
stellarpower <stellarpower@googlemail.com>
parents: 1459
diff changeset
238 gid_t *grouplist;
ed930fd6f60f Added the -G option to allow logins only for users that are members of a certain group. This allows finer control of an instance on who can and cannot login over a certain instance (e.g. password and not key). Needs double-checking and ensuring it meets platform requirements.
stellarpower <stellarpower@googlemail.com>
parents: 1459
diff changeset
239
ed930fd6f60f Added the -G option to allow logins only for users that are members of a certain group. This allows finer control of an instance on who can and cannot login over a certain instance (e.g. password and not key). Needs double-checking and ensuring it meets platform requirements.
stellarpower <stellarpower@googlemail.com>
parents: 1459
diff changeset
240
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 158
diff changeset
241 TRACE(("enter checkusername"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
242 if (userlen > MAX_USERNAME_LEN) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
243 return DROPBEAR_FAILURE;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
244 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
245
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
246 /* new user or username has changed */
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
247 if (ses.authstate.username == NULL ||
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
248 strcmp(username, ses.authstate.username) != 0) {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
249 /* the username needs resetting */
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
250 if (ses.authstate.username != NULL) {
594
a98a2138364a Improve capitalisation for all logged strings
Matt Johnston <matt@ucc.asn.au>
parents: 573
diff changeset
251 dropbear_log(LOG_WARNING, "Client trying multiple usernames from %s",
158
364a75cfebab Log the IP along with auth success/fail attempts
Matt Johnston <matt@ucc.asn.au>
parents: 121
diff changeset
252 svr_ses.addrstring);
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
253 m_free(ses.authstate.username);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
254 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
255 authclear();
464
4317be8b7cf9 Make a copy of passwd fields since getpwnam()'s retval isn't safe to keep
Matt Johnston <matt@ucc.asn.au>
parents: 454
diff changeset
256 fill_passwd(username);
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
257 ses.authstate.username = m_strdup(username);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
258 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
259
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
260 /* check that user exists */
464
4317be8b7cf9 Make a copy of passwd fields since getpwnam()'s retval isn't safe to keep
Matt Johnston <matt@ucc.asn.au>
parents: 454
diff changeset
261 if (!ses.authstate.pw_name) {
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 158
diff changeset
262 TRACE(("leave checkusername: user '%s' doesn't exist", username))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
263 dropbear_log(LOG_WARNING,
594
a98a2138364a Improve capitalisation for all logged strings
Matt Johnston <matt@ucc.asn.au>
parents: 573
diff changeset
264 "Login attempt for nonexistent user from %s",
158
364a75cfebab Log the IP along with auth success/fail attempts
Matt Johnston <matt@ucc.asn.au>
parents: 121
diff changeset
265 svr_ses.addrstring);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
266 return DROPBEAR_FAILURE;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
267 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
268
782
e0084f136cb8 If running as non-root only allow that user to log in
Matt Johnston <matt@ucc.asn.au>
parents: 692
diff changeset
269 /* check if we are running as non-root, and login user is different from the server */
e0084f136cb8 If running as non-root only allow that user to log in
Matt Johnston <matt@ucc.asn.au>
parents: 692
diff changeset
270 uid = geteuid();
e0084f136cb8 If running as non-root only allow that user to log in
Matt Johnston <matt@ucc.asn.au>
parents: 692
diff changeset
271 if (uid != 0 && uid != ses.authstate.pw_uid) {
e0084f136cb8 If running as non-root only allow that user to log in
Matt Johnston <matt@ucc.asn.au>
parents: 692
diff changeset
272 TRACE(("running as nonroot, only server uid is allowed"))
e0084f136cb8 If running as non-root only allow that user to log in
Matt Johnston <matt@ucc.asn.au>
parents: 692
diff changeset
273 dropbear_log(LOG_WARNING,
e0084f136cb8 If running as non-root only allow that user to log in
Matt Johnston <matt@ucc.asn.au>
parents: 692
diff changeset
274 "Login attempt with wrong user %s from %s",
e0084f136cb8 If running as non-root only allow that user to log in
Matt Johnston <matt@ucc.asn.au>
parents: 692
diff changeset
275 ses.authstate.pw_name,
e0084f136cb8 If running as non-root only allow that user to log in
Matt Johnston <matt@ucc.asn.au>
parents: 692
diff changeset
276 svr_ses.addrstring);
e0084f136cb8 If running as non-root only allow that user to log in
Matt Johnston <matt@ucc.asn.au>
parents: 692
diff changeset
277 return DROPBEAR_FAILURE;
e0084f136cb8 If running as non-root only allow that user to log in
Matt Johnston <matt@ucc.asn.au>
parents: 692
diff changeset
278 }
e0084f136cb8 If running as non-root only allow that user to log in
Matt Johnston <matt@ucc.asn.au>
parents: 692
diff changeset
279
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
280 /* check for non-root if desired */
464
4317be8b7cf9 Make a copy of passwd fields since getpwnam()'s retval isn't safe to keep
Matt Johnston <matt@ucc.asn.au>
parents: 454
diff changeset
281 if (svr_opts.norootlogin && ses.authstate.pw_uid == 0) {
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
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parents: 158
diff changeset
282 TRACE(("leave checkusername: root login disabled"))
4
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diff changeset
283 dropbear_log(LOG_WARNING, "root login rejected");
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parents:
diff changeset
284 return DROPBEAR_FAILURE;
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285 }
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parents:
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286
1534
ed930fd6f60f Added the -G option to allow logins only for users that are members of a certain group. This allows finer control of an instance on who can and cannot login over a certain instance (e.g. password and not key). Needs double-checking and ensuring it meets platform requirements.
stellarpower <stellarpower@googlemail.com>
parents: 1459
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287 /* check for login restricted to certain group if desired */
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stellarpower <stellarpower@googlemail.com>
parents: 1459
diff changeset
288 if (svr_opts.grouploginid) {
ed930fd6f60f Added the -G option to allow logins only for users that are members of a certain group. This allows finer control of an instance on who can and cannot login over a certain instance (e.g. password and not key). Needs double-checking and ensuring it meets platform requirements.
stellarpower <stellarpower@googlemail.com>
parents: 1459
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289
ed930fd6f60f Added the -G option to allow logins only for users that are members of a certain group. This allows finer control of an instance on who can and cannot login over a certain instance (e.g. password and not key). Needs double-checking and ensuring it meets platform requirements.
stellarpower <stellarpower@googlemail.com>
parents: 1459
diff changeset
290 for ( ; (ngroups <= NGROUPS_MAX) && (ngroups <= INT_MAX / 8); ngroups *= 2){
ed930fd6f60f Added the -G option to allow logins only for users that are members of a certain group. This allows finer control of an instance on who can and cannot login over a certain instance (e.g. password and not key). Needs double-checking and ensuring it meets platform requirements.
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parents: 1459
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291
ed930fd6f60f Added the -G option to allow logins only for users that are members of a certain group. This allows finer control of an instance on who can and cannot login over a certain instance (e.g. password and not key). Needs double-checking and ensuring it meets platform requirements.
stellarpower <stellarpower@googlemail.com>
parents: 1459
diff changeset
292 grouplist = malloc(sizeof(gid_t) * ngroups);
ed930fd6f60f Added the -G option to allow logins only for users that are members of a certain group. This allows finer control of an instance on who can and cannot login over a certain instance (e.g. password and not key). Needs double-checking and ensuring it meets platform requirements.
stellarpower <stellarpower@googlemail.com>
parents: 1459
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293
ed930fd6f60f Added the -G option to allow logins only for users that are members of a certain group. This allows finer control of an instance on who can and cannot login over a certain instance (e.g. password and not key). Needs double-checking and ensuring it meets platform requirements.
stellarpower <stellarpower@googlemail.com>
parents: 1459
diff changeset
294 ret = getgrouplist(ses.authstate.pw_name, ses.authstate.pw_gid, grouplist, &ngroups);
ed930fd6f60f Added the -G option to allow logins only for users that are members of a certain group. This allows finer control of an instance on who can and cannot login over a certain instance (e.g. password and not key). Needs double-checking and ensuring it meets platform requirements.
stellarpower <stellarpower@googlemail.com>
parents: 1459
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295
ed930fd6f60f Added the -G option to allow logins only for users that are members of a certain group. This allows finer control of an instance on who can and cannot login over a certain instance (e.g. password and not key). Needs double-checking and ensuring it meets platform requirements.
stellarpower <stellarpower@googlemail.com>
parents: 1459
diff changeset
296 if (ret != -1){
ed930fd6f60f Added the -G option to allow logins only for users that are members of a certain group. This allows finer control of an instance on who can and cannot login over a certain instance (e.g. password and not key). Needs double-checking and ensuring it meets platform requirements.
stellarpower <stellarpower@googlemail.com>
parents: 1459
diff changeset
297 break;
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parents: 1459
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298 }
ed930fd6f60f Added the -G option to allow logins only for users that are members of a certain group. This allows finer control of an instance on who can and cannot login over a certain instance (e.g. password and not key). Needs double-checking and ensuring it meets platform requirements.
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parents: 1459
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299
ed930fd6f60f Added the -G option to allow logins only for users that are members of a certain group. This allows finer control of an instance on who can and cannot login over a certain instance (e.g. password and not key). Needs double-checking and ensuring it meets platform requirements.
stellarpower <stellarpower@googlemail.com>
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diff changeset
300 free(grouplist);
ed930fd6f60f Added the -G option to allow logins only for users that are members of a certain group. This allows finer control of an instance on who can and cannot login over a certain instance (e.g. password and not key). Needs double-checking and ensuring it meets platform requirements.
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301 ngroups *= 2;
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parents: 1459
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302 }
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stellarpower <stellarpower@googlemail.com>
parents: 1459
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303
ed930fd6f60f Added the -G option to allow logins only for users that are members of a certain group. This allows finer control of an instance on who can and cannot login over a certain instance (e.g. password and not key). Needs double-checking and ensuring it meets platform requirements.
stellarpower <stellarpower@googlemail.com>
parents: 1459
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304 if ((ngroups > NGROUPS_MAX / 8) || (ngroups > INT_MAX / 8)){
ed930fd6f60f Added the -G option to allow logins only for users that are members of a certain group. This allows finer control of an instance on who can and cannot login over a certain instance (e.g. password and not key). Needs double-checking and ensuring it meets platform requirements.
stellarpower <stellarpower@googlemail.com>
parents: 1459
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305
ed930fd6f60f Added the -G option to allow logins only for users that are members of a certain group. This allows finer control of an instance on who can and cannot login over a certain instance (e.g. password and not key). Needs double-checking and ensuring it meets platform requirements.
stellarpower <stellarpower@googlemail.com>
parents: 1459
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306 TRACE(("Cannot walk group structure for current user, too many groups"))
ed930fd6f60f Added the -G option to allow logins only for users that are members of a certain group. This allows finer control of an instance on who can and cannot login over a certain instance (e.g. password and not key). Needs double-checking and ensuring it meets platform requirements.
stellarpower <stellarpower@googlemail.com>
parents: 1459
diff changeset
307 dropbear_log(LOG_ERR, "Cannot walk group structure for current user, too many groups");
ed930fd6f60f Added the -G option to allow logins only for users that are members of a certain group. This allows finer control of an instance on who can and cannot login over a certain instance (e.g. password and not key). Needs double-checking and ensuring it meets platform requirements.
stellarpower <stellarpower@googlemail.com>
parents: 1459
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308 return DROPBEAR_FAILURE;
ed930fd6f60f Added the -G option to allow logins only for users that are members of a certain group. This allows finer control of an instance on who can and cannot login over a certain instance (e.g. password and not key). Needs double-checking and ensuring it meets platform requirements.
stellarpower <stellarpower@googlemail.com>
parents: 1459
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309 }
ed930fd6f60f Added the -G option to allow logins only for users that are members of a certain group. This allows finer control of an instance on who can and cannot login over a certain instance (e.g. password and not key). Needs double-checking and ensuring it meets platform requirements.
stellarpower <stellarpower@googlemail.com>
parents: 1459
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310
ed930fd6f60f Added the -G option to allow logins only for users that are members of a certain group. This allows finer control of an instance on who can and cannot login over a certain instance (e.g. password and not key). Needs double-checking and ensuring it meets platform requirements.
stellarpower <stellarpower@googlemail.com>
parents: 1459
diff changeset
311 ngroups = 0;
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stellarpower <stellarpower@googlemail.com>
parents: 1459
diff changeset
312 for (int i = 0; i < ret; i++){
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stellarpower <stellarpower@googlemail.com>
parents: 1459
diff changeset
313 if (grouplist[i] == *svr_opts.grouploginid){
ed930fd6f60f Added the -G option to allow logins only for users that are members of a certain group. This allows finer control of an instance on who can and cannot login over a certain instance (e.g. password and not key). Needs double-checking and ensuring it meets platform requirements.
stellarpower <stellarpower@googlemail.com>
parents: 1459
diff changeset
314 ngroups = 1; //Just used as a flag to indicate success;
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stellarpower <stellarpower@googlemail.com>
parents: 1459
diff changeset
315 break;
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stellarpower <stellarpower@googlemail.com>
parents: 1459
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316 }
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stellarpower <stellarpower@googlemail.com>
parents: 1459
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317
ed930fd6f60f Added the -G option to allow logins only for users that are members of a certain group. This allows finer control of an instance on who can and cannot login over a certain instance (e.g. password and not key). Needs double-checking and ensuring it meets platform requirements.
stellarpower <stellarpower@googlemail.com>
parents: 1459
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318 }
ed930fd6f60f Added the -G option to allow logins only for users that are members of a certain group. This allows finer control of an instance on who can and cannot login over a certain instance (e.g. password and not key). Needs double-checking and ensuring it meets platform requirements.
stellarpower <stellarpower@googlemail.com>
parents: 1459
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319
ed930fd6f60f Added the -G option to allow logins only for users that are members of a certain group. This allows finer control of an instance on who can and cannot login over a certain instance (e.g. password and not key). Needs double-checking and ensuring it meets platform requirements.
stellarpower <stellarpower@googlemail.com>
parents: 1459
diff changeset
320 if (!ngroups){
ed930fd6f60f Added the -G option to allow logins only for users that are members of a certain group. This allows finer control of an instance on who can and cannot login over a certain instance (e.g. password and not key). Needs double-checking and ensuring it meets platform requirements.
stellarpower <stellarpower@googlemail.com>
parents: 1459
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321 TRACE(("leave checkusername: user not in permitted group"))
ed930fd6f60f Added the -G option to allow logins only for users that are members of a certain group. This allows finer control of an instance on who can and cannot login over a certain instance (e.g. password and not key). Needs double-checking and ensuring it meets platform requirements.
stellarpower <stellarpower@googlemail.com>
parents: 1459
diff changeset
322 dropbear_log(LOG_WARNING, "logins are restricted to the group %s but user %s is not a member", svr_opts.grouploginname, ses.authstate.pw_name);
ed930fd6f60f Added the -G option to allow logins only for users that are members of a certain group. This allows finer control of an instance on who can and cannot login over a certain instance (e.g. password and not key). Needs double-checking and ensuring it meets platform requirements.
stellarpower <stellarpower@googlemail.com>
parents: 1459
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323 return DROPBEAR_FAILURE;
ed930fd6f60f Added the -G option to allow logins only for users that are members of a certain group. This allows finer control of an instance on who can and cannot login over a certain instance (e.g. password and not key). Needs double-checking and ensuring it meets platform requirements.
stellarpower <stellarpower@googlemail.com>
parents: 1459
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324 }
ed930fd6f60f Added the -G option to allow logins only for users that are members of a certain group. This allows finer control of an instance on who can and cannot login over a certain instance (e.g. password and not key). Needs double-checking and ensuring it meets platform requirements.
stellarpower <stellarpower@googlemail.com>
parents: 1459
diff changeset
325 }
ed930fd6f60f Added the -G option to allow logins only for users that are members of a certain group. This allows finer control of an instance on who can and cannot login over a certain instance (e.g. password and not key). Needs double-checking and ensuring it meets platform requirements.
stellarpower <stellarpower@googlemail.com>
parents: 1459
diff changeset
326
464
4317be8b7cf9 Make a copy of passwd fields since getpwnam()'s retval isn't safe to keep
Matt Johnston <matt@ucc.asn.au>
parents: 454
diff changeset
327 TRACE(("shell is %s", ses.authstate.pw_shell))
4
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diff changeset
328
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329 /* check that the shell is set */
464
4317be8b7cf9 Make a copy of passwd fields since getpwnam()'s retval isn't safe to keep
Matt Johnston <matt@ucc.asn.au>
parents: 454
diff changeset
330 usershell = ses.authstate.pw_shell;
4
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parents:
diff changeset
331 if (usershell[0] == '\0') {
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parents:
diff changeset
332 /* empty shell in /etc/passwd means /bin/sh according to passwd(5) */
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parents:
diff changeset
333 usershell = "/bin/sh";
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
334 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
335
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
336 /* check the shell is valid. If /etc/shells doesn't exist, getusershell()
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parents:
diff changeset
337 * should return some standard shells like "/bin/sh" and "/bin/csh" (this
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
338 * is platform-specific) */
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parents:
diff changeset
339 setusershell();
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parents:
diff changeset
340 while ((listshell = getusershell()) != 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: 158
diff changeset
341 TRACE(("test shell is '%s'", listshell))
4
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parents:
diff changeset
342 if (strcmp(listshell, usershell) == 0) {
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parents:
diff changeset
343 /* have a match */
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parents:
diff changeset
344 goto goodshell;
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parents:
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345 }
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parents:
diff changeset
346 }
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parents:
diff changeset
347 /* no matching shell */
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parents:
diff changeset
348 endusershell();
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 158
diff changeset
349 TRACE(("no matching shell"))
594
a98a2138364a Improve capitalisation for all logged strings
Matt Johnston <matt@ucc.asn.au>
parents: 573
diff changeset
350 dropbear_log(LOG_WARNING, "User '%s' has invalid shell, rejected",
464
4317be8b7cf9 Make a copy of passwd fields since getpwnam()'s retval isn't safe to keep
Matt Johnston <matt@ucc.asn.au>
parents: 454
diff changeset
351 ses.authstate.pw_name);
4
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parents:
diff changeset
352 return DROPBEAR_FAILURE;
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
353
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parents:
diff changeset
354 goodshell:
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parents:
diff changeset
355 endusershell();
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 158
diff changeset
356 TRACE(("matching shell"))
4
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
357
464
4317be8b7cf9 Make a copy of passwd fields since getpwnam()'s retval isn't safe to keep
Matt Johnston <matt@ucc.asn.au>
parents: 454
diff changeset
358 TRACE(("uid = %d", ses.authstate.pw_uid))
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 158
diff changeset
359 TRACE(("leave checkusername"))
4
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parents:
diff changeset
360 return DROPBEAR_SUCCESS;
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
361 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
362
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
363 /* Send a failure message to the client, in responds to a userauth_request.
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
364 * Partial indicates whether to set the "partial success" flag,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
365 * incrfail is whether to count this failure in the failure count (which
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
366 * is limited. This function also handles disconnection after too many
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
367 * failures */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
368 void send_msg_userauth_failure(int partial, int incrfail) {
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
369
70
b0316ce64e4b Merging in the changes from 0.41-0.43 main Dropbear tree
Matt Johnston <matt@ucc.asn.au>
parents: 68
diff changeset
370 buffer *typebuf = NULL;
4
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parents:
diff changeset
371
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 158
diff changeset
372 TRACE(("enter send_msg_userauth_failure"))
4
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parents:
diff changeset
373
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
374 CHECKCLEARTOWRITE();
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
375
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parents:
diff changeset
376 buf_putbyte(ses.writepayload, SSH_MSG_USERAUTH_FAILURE);
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parents:
diff changeset
377
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
378 /* put a list of allowed types */
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parents:
diff changeset
379 typebuf = buf_new(30); /* long enough for PUBKEY and PASSWORD */
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parents:
diff changeset
380
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
381 if (ses.authstate.authtypes & AUTH_TYPE_PUBKEY) {
1094
c45d65392c1a Fix pointer differ in signess warnings [-Werror=pointer-sign]
Gaël PORTAY <gael.portay@gmail.com>
parents: 940
diff changeset
382 buf_putbytes(typebuf, (const unsigned char *)AUTH_METHOD_PUBKEY, AUTH_METHOD_PUBKEY_LEN);
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
383 if (ses.authstate.authtypes & AUTH_TYPE_PASSWORD) {
4
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parents:
diff changeset
384 buf_putbyte(typebuf, ',');
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parents:
diff changeset
385 }
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
386 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
387
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
388 if (ses.authstate.authtypes & AUTH_TYPE_PASSWORD) {
1094
c45d65392c1a Fix pointer differ in signess warnings [-Werror=pointer-sign]
Gaël PORTAY <gael.portay@gmail.com>
parents: 940
diff changeset
389 buf_putbytes(typebuf, (const unsigned char *)AUTH_METHOD_PASSWORD, AUTH_METHOD_PASSWORD_LEN);
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390 }
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391
761
ac2158e3e403 ecc kind of works, needs fixing/testing
Matt Johnston <matt@ucc.asn.au>
parents: 692
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392 buf_putbufstring(ses.writepayload, typebuf);
300
baea1d43e7eb Some cleanups/fixes for various TRACE statements
Matt Johnston <matt@ucc.asn.au>
parents: 165
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393
761
ac2158e3e403 ecc kind of works, needs fixing/testing
Matt Johnston <matt@ucc.asn.au>
parents: 692
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394 TRACE(("auth fail: methods %d, '%.*s'", ses.authstate.authtypes,
762
a78a38e402d1 - Fix various hardcoded uses of SHA1
Matt Johnston <matt@ucc.asn.au>
parents: 761
diff changeset
395 typebuf->len, typebuf->data))
300
baea1d43e7eb Some cleanups/fixes for various TRACE statements
Matt Johnston <matt@ucc.asn.au>
parents: 165
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396
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397 buf_free(typebuf);
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Matt Johnston <matt@ucc.asn.au>
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398
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Matt Johnston <matt@ucc.asn.au>
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399 buf_putbyte(ses.writepayload, partial ? 1 : 0);
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Matt Johnston <matt@ucc.asn.au>
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400 encrypt_packet();
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Matt Johnston <matt@ucc.asn.au>
parents:
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401
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Matt Johnston <matt@ucc.asn.au>
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402 if (incrfail) {
573
d3ea8b9672f0 - Test for pam_fail_delay() function in configure
Matt Johnston <matt@ucc.asn.au>
parents: 501
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403 unsigned int delay;
d3ea8b9672f0 - Test for pam_fail_delay() function in configure
Matt Johnston <matt@ucc.asn.au>
parents: 501
diff changeset
404 genrandom((unsigned char*)&delay, sizeof(delay));
808
d7784616409a improve auth failure delays to avoid indicating which users exist
Matt Johnston <matt@ucc.asn.au>
parents: 782
diff changeset
405 /* We delay for 300ms +- 50ms */
d7784616409a improve auth failure delays to avoid indicating which users exist
Matt Johnston <matt@ucc.asn.au>
parents: 782
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406 delay = 250000 + (delay % 100000);
573
d3ea8b9672f0 - Test for pam_fail_delay() function in configure
Matt Johnston <matt@ucc.asn.au>
parents: 501
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407 usleep(delay);
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 24
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408 ses.authstate.failcount++;
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409 }
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Matt Johnston <matt@ucc.asn.au>
parents:
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410
1442
517c67cbcd31 dropbear server: support -T max auth tries
Kevin Darbyshire-Bryant <kevin@darbyshire-bryant.me.uk>
parents: 1295
diff changeset
411 if (ses.authstate.failcount >= svr_opts.maxauthtries) {
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Matt Johnston <matt@ucc.asn.au>
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412 char * userstr;
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Matt Johnston <matt@ucc.asn.au>
parents:
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413 /* XXX - send disconnect ? */
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 158
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414 TRACE(("Max auth tries reached, exiting"))
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415
464
4317be8b7cf9 Make a copy of passwd fields since getpwnam()'s retval isn't safe to keep
Matt Johnston <matt@ucc.asn.au>
parents: 454
diff changeset
416 if (ses.authstate.pw_name == NULL) {
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Matt Johnston <matt@ucc.asn.au>
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417 userstr = "is invalid";
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418 } else {
464
4317be8b7cf9 Make a copy of passwd fields since getpwnam()'s retval isn't safe to keep
Matt Johnston <matt@ucc.asn.au>
parents: 454
diff changeset
419 userstr = ses.authstate.pw_name;
4
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420 }
158
364a75cfebab Log the IP along with auth success/fail attempts
Matt Johnston <matt@ucc.asn.au>
parents: 121
diff changeset
421 dropbear_exit("Max auth tries reached - user '%s' from %s",
364a75cfebab Log the IP along with auth success/fail attempts
Matt Johnston <matt@ucc.asn.au>
parents: 121
diff changeset
422 userstr, svr_ses.addrstring);
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423 }
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424
165
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Matt Johnston <matt@ucc.asn.au>
parents: 158
diff changeset
425 TRACE(("leave send_msg_userauth_failure"))
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426 }
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Matt Johnston <matt@ucc.asn.au>
parents:
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427
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Matt Johnston <matt@ucc.asn.au>
parents:
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428 /* Send a success message to the user, and set the "authdone" flag */
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Matt Johnston <matt@ucc.asn.au>
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429 void send_msg_userauth_success() {
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Matt Johnston <matt@ucc.asn.au>
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430
165
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Matt Johnston <matt@ucc.asn.au>
parents: 158
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431 TRACE(("enter send_msg_userauth_success"))
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Matt Johnston <matt@ucc.asn.au>
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432
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Matt Johnston <matt@ucc.asn.au>
parents:
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433 CHECKCLEARTOWRITE();
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Matt Johnston <matt@ucc.asn.au>
parents:
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434
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Matt Johnston <matt@ucc.asn.au>
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435 buf_putbyte(ses.writepayload, SSH_MSG_USERAUTH_SUCCESS);
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Matt Johnston <matt@ucc.asn.au>
parents:
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436 encrypt_packet();
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Matt Johnston <matt@ucc.asn.au>
parents:
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437
501
d58c478bd399 Add support for [email protected] delayed compression.
Matt Johnston <matt@ucc.asn.au>
parents: 483
diff changeset
438 /* authdone must be set after encrypt_packet() for
d58c478bd399 Add support for [email protected] delayed compression.
Matt Johnston <matt@ucc.asn.au>
parents: 483
diff changeset
439 * delayed-zlib mode */
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
440 ses.authstate.authdone = 1;
1139
43a8ea69b24c Fix problem where auth timeout wasn't checked when waiting for ident
Matt Johnston <matt@ucc.asn.au>
parents: 1122
diff changeset
441 ses.connect_time = 0;
43a8ea69b24c Fix problem where auth timeout wasn't checked when waiting for ident
Matt Johnston <matt@ucc.asn.au>
parents: 1122
diff changeset
442
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Matt Johnston <matt@ucc.asn.au>
parents:
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443
464
4317be8b7cf9 Make a copy of passwd fields since getpwnam()'s retval isn't safe to keep
Matt Johnston <matt@ucc.asn.au>
parents: 454
diff changeset
444 if (ses.authstate.pw_uid == 0) {
21
d7cc5b484a2e - Port restriction code back in
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
445 ses.allowprivport = 1;
d7cc5b484a2e - Port restriction code back in
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
446 }
d7cc5b484a2e - Port restriction code back in
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
447
4
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Matt Johnston <matt@ucc.asn.au>
parents:
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448 /* Remove from the list of pre-auth sockets. Should be m_close(), since if
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Matt Johnston <matt@ucc.asn.au>
parents:
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449 * we fail, we might end up leaking connection slots, and disallow new
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Matt Johnston <matt@ucc.asn.au>
parents:
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450 * logins - a nasty situation. */
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Matt Johnston <matt@ucc.asn.au>
parents:
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451 m_close(svr_ses.childpipe);
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Matt Johnston <matt@ucc.asn.au>
parents:
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452
165
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Matt Johnston <matt@ucc.asn.au>
parents: 158
diff changeset
453 TRACE(("leave send_msg_userauth_success"))
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Matt Johnston <matt@ucc.asn.au>
parents:
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454
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455 }