Mercurial > dovecot > core-2.2
annotate src/auth/auth-request.c @ 3161:6a3254e3c3de HEAD
Moved cache handling from sql/ldap-specific code to generic auth-request
code. Did some small optimizations on the way.
author | Timo Sirainen <tss@iki.fi> |
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date | Sun, 27 Feb 2005 00:55:03 +0200 |
parents | 8849f2e380d1 |
children | da9e4ffef09f |
rev | line source |
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1 /* Copyright (C) 2002-2005 Timo Sirainen */ |
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2 |
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3 #include "common.h" |
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4 #include "ioloop.h" |
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5 #include "buffer.h" |
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6 #include "hash.h" |
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7 #include "str.h" |
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8 #include "safe-memset.h" |
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9 #include "str-sanitize.h" |
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10 #include "var-expand.h" |
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11 #include "auth-request.h" |
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12 #include "auth-client-connection.h" |
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13 #include "auth-master-connection.h" |
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14 #include "passdb.h" |
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15 #include "passdb-cache.h" |
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16 |
3072 | 17 struct auth_request * |
18 auth_request_new(struct auth *auth, struct mech_module *mech, | |
3074 | 19 mech_callback_t *callback, void *context) |
3072 | 20 { |
21 struct auth_request *request; | |
22 | |
23 request = mech->auth_new(); | |
24 | |
25 request->refcount = 1; | |
3074 | 26 request->created = ioloop_time; |
27 | |
3072 | 28 request->auth = auth; |
29 request->mech = mech; | |
30 request->callback = callback; | |
3074 | 31 request->context = context; |
3072 | 32 return request; |
33 } | |
34 | |
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35 void auth_request_success(struct auth_request *request, |
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36 const void *data, size_t data_size) |
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37 { |
3074 | 38 i_assert(!request->finished); |
39 request->finished = TRUE; | |
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40 |
3074 | 41 request->successful = TRUE; |
42 request->callback(request, AUTH_CLIENT_RESULT_SUCCESS, | |
43 data, data_size); | |
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44 } |
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45 |
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46 void auth_request_fail(struct auth_request *request) |
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47 { |
3074 | 48 i_assert(!request->finished); |
49 request->finished = TRUE; | |
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50 |
3074 | 51 request->callback(request, AUTH_CLIENT_RESULT_FAILURE, NULL, 0); |
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52 } |
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53 |
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54 void auth_request_internal_failure(struct auth_request *request) |
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55 { |
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56 request->internal_failure = TRUE; |
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57 auth_request_fail(request); |
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58 } |
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59 |
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60 void auth_request_ref(struct auth_request *request) |
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61 { |
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62 request->refcount++; |
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63 } |
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64 |
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65 int auth_request_unref(struct auth_request *request) |
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66 { |
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67 i_assert(request->refcount > 0); |
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68 if (--request->refcount > 0) |
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69 return TRUE; |
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70 |
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71 request->mech->auth_free(request); |
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72 return FALSE; |
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73 } |
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74 |
3068 | 75 void auth_request_initial(struct auth_request *request, |
3071 | 76 const unsigned char *data, size_t data_size) |
3068 | 77 { |
3071 | 78 request->mech->auth_initial(request, data, data_size); |
3068 | 79 } |
80 | |
81 void auth_request_continue(struct auth_request *request, | |
3071 | 82 const unsigned char *data, size_t data_size) |
3068 | 83 { |
3071 | 84 request->mech->auth_continue(request, data, data_size); |
3068 | 85 } |
86 | |
3161
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87 static void auth_request_save_cache(struct auth_request *request, |
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88 enum passdb_result result) |
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89 { |
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90 struct passdb_module *passdb = request->auth->passdb; |
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91 string_t *str; |
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92 |
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93 if (passdb_cache == NULL) |
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94 return; |
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95 |
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96 if (passdb->cache_key == NULL) |
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97 return; |
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98 |
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99 if (result < 0) { |
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100 /* lookup failed. */ |
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101 if (result == PASSDB_RESULT_USER_UNKNOWN) { |
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102 auth_cache_insert(passdb_cache, request, |
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103 passdb->cache_key, ""); |
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104 } |
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105 return; |
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106 } |
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107 |
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108 /* save all except the currently given password in cache */ |
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109 str = t_str_new(32 + str_len(request->extra_fields)); |
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110 if (request->passdb_password != NULL) { |
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111 if (*request->passdb_password != '{') { |
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112 /* cached passwords must have a known scheme */ |
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113 str_append_c(str, '{'); |
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114 str_append(str, passdb->default_pass_scheme); |
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115 str_append_c(str, '}'); |
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116 } |
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117 str_append(str, request->passdb_password); |
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118 } |
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119 if (request->extra_fields != NULL) { |
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120 str_append_c(str, '\t'); |
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121 str_append_str(str, request->extra_fields); |
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122 } |
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123 if (request->no_failure_delay) { |
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124 str_append_c(str, '\t'); |
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125 str_append(str, "nodelay"); |
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126 } |
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127 auth_cache_insert(passdb_cache, request, passdb->cache_key, str_c(str)); |
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128 } |
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129 |
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130 static void auth_request_verify_plain_callback(enum passdb_result result, |
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131 struct auth_request *request) |
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132 { |
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133 auth_request_save_cache(request, result); |
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134 |
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135 if (request->proxy) { |
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136 /* we're proxying - send back the password that was |
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137 sent by user (not the password in passdb). */ |
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138 str_printfa(request->extra_fields, "\tpass=%s", |
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139 request->mech_password); |
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140 } |
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141 |
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142 if (request->passdb_password != NULL) { |
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143 safe_memset(request->passdb_password, 0, |
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144 strlen(request->mech_password)); |
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145 } |
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146 |
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147 safe_memset(request->mech_password, 0, strlen(request->mech_password)); |
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148 request->private_callback.verify_plain(result, request); |
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149 } |
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150 |
3068 | 151 void auth_request_verify_plain(struct auth_request *request, |
152 const char *password, | |
153 verify_plain_callback_t *callback) | |
154 { | |
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155 struct passdb_module *passdb = request->auth->passdb; |
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156 enum passdb_result result; |
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157 const char *cache_key; |
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158 |
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159 cache_key = passdb_cache == NULL ? NULL : passdb->cache_key; |
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160 if (cache_key != NULL) { |
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161 if (passdb_cache_verify_plain(request, cache_key, password, |
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162 &result)) { |
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163 callback(result, request); |
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164 return; |
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165 } |
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166 } |
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167 |
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168 request->mech_password = p_strdup(request->pool, password); |
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169 request->private_callback.verify_plain = callback; |
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170 passdb->verify_plain(request, password, |
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171 auth_request_verify_plain_callback); |
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172 } |
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173 |
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174 static void |
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175 auth_request_lookup_credentials_callback(enum passdb_result result, |
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176 const char *credentials, |
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177 struct auth_request *request) |
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178 { |
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179 auth_request_save_cache(request, result); |
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180 |
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181 if (request->passdb_password != NULL) { |
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182 safe_memset(request->passdb_password, 0, |
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183 strlen(request->mech_password)); |
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184 } |
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185 |
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186 request->private_callback.lookup_credentials(result, credentials, |
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187 request); |
3068 | 188 } |
189 | |
190 void auth_request_lookup_credentials(struct auth_request *request, | |
191 enum passdb_credentials credentials, | |
192 lookup_credentials_callback_t *callback) | |
193 { | |
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194 struct passdb_module *passdb = request->auth->passdb; |
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195 const char *cache_key, *result, *scheme; |
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196 |
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197 cache_key = passdb_cache == NULL ? NULL : passdb->cache_key; |
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198 if (cache_key != NULL) { |
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199 if (passdb_cache_lookup_credentials(request, cache_key, |
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200 &result, &scheme)) { |
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201 passdb_handle_credentials(result != NULL ? |
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202 PASSDB_RESULT_OK : |
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203 PASSDB_RESULT_USER_UNKNOWN, |
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204 credentials, result, scheme, |
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205 callback, request); |
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206 return; |
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207 } |
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208 } |
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209 |
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210 request->private_callback.lookup_credentials = callback; |
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211 passdb->lookup_credentials(request, credentials, |
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212 auth_request_lookup_credentials_callback); |
3068 | 213 } |
214 | |
215 void auth_request_lookup_user(struct auth_request *request, | |
216 userdb_callback_t *callback, void *context) | |
217 { | |
218 request->auth->userdb->lookup(request, callback, context); | |
219 } | |
220 | |
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221 int auth_request_set_username(struct auth_request *request, |
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222 const char *username, const char **error_r) |
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223 { |
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224 unsigned char *p; |
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225 |
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226 if (*username == '\0') { |
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227 /* Some PAM plugins go nuts with empty usernames */ |
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228 *error_r = "Empty username"; |
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229 return FALSE; |
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230 } |
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231 |
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232 if (strchr(username, '@') == NULL && |
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233 request->auth->default_realm != NULL) { |
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234 request->user = p_strconcat(request->pool, username, "@", |
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235 request->auth->default_realm, NULL); |
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236 } else { |
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237 request->user = p_strdup(request->pool, username); |
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238 } |
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239 |
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240 for (p = (unsigned char *)request->user; *p != '\0'; p++) { |
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241 if (request->auth->username_translation[*p & 0xff] != 0) |
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242 *p = request->auth->username_translation[*p & 0xff]; |
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243 if (request->auth->username_chars[*p & 0xff] == 0) { |
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244 *error_r = "Username contains disallowed characters"; |
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245 return FALSE; |
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246 } |
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247 } |
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248 |
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249 return TRUE; |
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250 } |
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251 |
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252 void auth_request_set_field(struct auth_request *request, |
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253 const char *name, const char *value) |
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254 { |
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255 string_t *str; |
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256 |
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257 i_assert(value != NULL); |
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258 |
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259 if (strcmp(name, "password") == 0) { |
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260 if (request->passdb_password == NULL) { |
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261 request->passdb_password = |
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262 p_strdup(request->pool, value); |
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263 } else { |
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264 auth_request_log_error(request, "auth", |
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265 "Multiple password values not supported"); |
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266 } |
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267 return; |
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268 } |
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269 |
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270 if (strcmp(name, "nodelay") == 0) { |
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271 /* don't delay replying to client of the failure */ |
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272 request->no_failure_delay = TRUE; |
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273 return; |
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274 } |
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275 |
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276 str = request->extra_fields; |
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277 if (str == NULL) |
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278 request->extra_fields = str = str_new(request->pool, 64); |
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279 |
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280 if (strcmp(name, "nologin") == 0) { |
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281 /* user can't actually login - don't keep this |
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282 reply for master */ |
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283 request->no_login = TRUE; |
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284 if (str_len(str) > 0) |
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285 str_append_c(str, '\t'); |
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286 str_append(str, name); |
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287 } else if (strcmp(name, "proxy") == 0) { |
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288 /* we're proxying authentication for this user. send |
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289 password back if using plaintext authentication. */ |
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290 request->proxy = TRUE; |
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291 if (str_len(str) > 0) |
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292 str_append_c(str, '\t'); |
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293 str_append(str, name); |
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294 } else { |
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295 if (str_len(str) > 0) |
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296 str_append_c(str, '\t'); |
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297 str_printfa(str, "%s=%s", name, value); |
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298 } |
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299 } |
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300 |
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301 static const char *escape_none(const char *str) |
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302 { |
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303 return str; |
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304 } |
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305 |
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306 const struct var_expand_table * |
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307 auth_request_get_var_expand_table(const struct auth_request *auth_request, |
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308 const char *(*escape_func)(const char *)) |
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309 { |
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310 static struct var_expand_table static_tab[] = { |
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311 { 'u', NULL }, |
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312 { 'n', NULL }, |
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313 { 'd', NULL }, |
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314 { 's', NULL }, |
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315 { 'h', NULL }, |
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316 { 'l', NULL }, |
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317 { 'r', NULL }, |
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318 { 'p', NULL }, |
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319 { '\0', NULL } |
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320 }; |
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321 struct var_expand_table *tab; |
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322 |
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323 if (escape_func == NULL) |
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324 escape_func = escape_none; |
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325 |
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326 tab = t_malloc(sizeof(static_tab)); |
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327 memcpy(tab, static_tab, sizeof(static_tab)); |
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328 |
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329 tab[0].value = escape_func(auth_request->user); |
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330 tab[1].value = escape_func(t_strcut(auth_request->user, '@')); |
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331 tab[2].value = strchr(auth_request->user, '@'); |
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332 if (tab[2].value != NULL) |
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333 tab[2].value = escape_func(tab[2].value+1); |
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334 tab[3].value = auth_request->service; |
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335 /* tab[4] = we have no home dir */ |
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336 if (auth_request->local_ip.family != 0) |
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337 tab[5].value = net_ip2addr(&auth_request->local_ip); |
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338 if (auth_request->remote_ip.family != 0) |
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339 tab[6].value = net_ip2addr(&auth_request->remote_ip); |
3074 | 340 tab[7].value = dec2str(auth_request->client_pid); |
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341 return tab; |
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342 } |
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343 |
3069 | 344 static const char * |
345 get_log_str(struct auth_request *auth_request, const char *subsystem, | |
346 const char *format, va_list va) | |
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347 { |
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348 #define MAX_LOG_USERNAME_LEN 64 |
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349 const char *ip; |
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350 string_t *str; |
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351 |
3069 | 352 str = t_str_new(128); |
353 str_append(str, subsystem); | |
354 str_append_c(str, '('); | |
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355 |
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356 if (auth_request->user == NULL) |
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357 str_append(str, "?"); |
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358 else { |
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359 str_sanitize_append(str, auth_request->user, |
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360 MAX_LOG_USERNAME_LEN); |
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361 } |
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362 |
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363 ip = net_ip2addr(&auth_request->remote_ip); |
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364 if (ip != NULL) { |
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365 str_append_c(str, ','); |
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366 str_append(str, ip); |
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367 } |
3069 | 368 str_append(str, "): "); |
369 str_vprintfa(str, format, va); | |
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370 return str_c(str); |
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371 } |
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372 |
3069 | 373 void auth_request_log_debug(struct auth_request *auth_request, |
374 const char *subsystem, | |
375 const char *format, ...) | |
376 { | |
377 va_list va; | |
378 | |
379 if (!auth_request->auth->verbose_debug) | |
380 return; | |
381 | |
382 va_start(va, format); | |
383 t_push(); | |
384 i_info("%s", get_log_str(auth_request, subsystem, format, va)); | |
385 t_pop(); | |
386 va_end(va); | |
387 } | |
388 | |
389 void auth_request_log_info(struct auth_request *auth_request, | |
390 const char *subsystem, | |
391 const char *format, ...) | |
392 { | |
393 va_list va; | |
394 | |
395 if (!auth_request->auth->verbose) | |
396 return; | |
397 | |
398 va_start(va, format); | |
399 t_push(); | |
400 i_info("%s", get_log_str(auth_request, subsystem, format, va)); | |
401 t_pop(); | |
402 va_end(va); | |
403 } | |
404 | |
405 void auth_request_log_error(struct auth_request *auth_request, | |
406 const char *subsystem, | |
407 const char *format, ...) | |
408 { | |
409 va_list va; | |
410 | |
411 va_start(va, format); | |
412 t_push(); | |
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413 i_error("%s", get_log_str(auth_request, subsystem, format, va)); |
3069 | 414 t_pop(); |
415 va_end(va); | |
416 } |