Mercurial > hg > nginx-quic
annotate src/mail/ngx_mail_pop3_handler.c @ 5659:3fb6615bb87f
Upstream: plugged potential memory leak on reload.
The SSL_CTX_set_cipher_list() may fail if there are no valid ciphers
specified in proxy_ssl_ciphers / uwsgi_ssl_ciphers, resulting in
SSL context leak.
In theory, ngx_pool_cleanup_add() may fail too, but this case is
intentionally left out for now as it's almost impossible and proper fix
will require changes to http ssl and mail ssl code as well.
author | Maxim Dounin <mdounin@mdounin.ru> |
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date | Fri, 18 Apr 2014 20:13:24 +0400 |
parents | 778ef9c3fd2d |
children | bcb107bb89cd |
rev | line source |
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1 |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
4412 | 4 * Copyright (C) Nginx, Inc. |
441
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5 */ |
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8 #include <ngx_config.h> |
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9 #include <ngx_core.h> |
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10 #include <ngx_event.h> |
1136 | 11 #include <ngx_mail.h> |
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12 #include <ngx_mail_pop3_module.h> |
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13 |
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14 |
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15 static ngx_int_t ngx_mail_pop3_user(ngx_mail_session_t *s, ngx_connection_t *c); |
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16 static ngx_int_t ngx_mail_pop3_pass(ngx_mail_session_t *s, ngx_connection_t *c); |
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17 static ngx_int_t ngx_mail_pop3_capa(ngx_mail_session_t *s, ngx_connection_t *c, |
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18 ngx_int_t stls); |
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19 static ngx_int_t ngx_mail_pop3_stls(ngx_mail_session_t *s, ngx_connection_t *c); |
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20 static ngx_int_t ngx_mail_pop3_apop(ngx_mail_session_t *s, ngx_connection_t *c); |
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21 static ngx_int_t ngx_mail_pop3_auth(ngx_mail_session_t *s, ngx_connection_t *c); |
539 | 22 |
413
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23 |
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24 static u_char pop3_greeting[] = "+OK POP3 ready" CRLF; |
521 | 25 static u_char pop3_ok[] = "+OK" CRLF; |
809 | 26 static u_char pop3_next[] = "+ " CRLF; |
27 static u_char pop3_username[] = "+ VXNlcm5hbWU6" CRLF; | |
28 static u_char pop3_password[] = "+ UGFzc3dvcmQ6" CRLF; | |
521 | 29 static u_char pop3_invalid_command[] = "-ERR invalid command" CRLF; |
30 | |
31 | |
32 void | |
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33 ngx_mail_pop3_init_session(ngx_mail_session_t *s, ngx_connection_t *c) |
541 | 34 { |
800 | 35 u_char *p; |
1136 | 36 ngx_mail_core_srv_conf_t *cscf; |
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37 ngx_mail_pop3_srv_conf_t *pscf; |
417
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38 |
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39 pscf = ngx_mail_get_module_srv_conf(s, ngx_mail_pop3_module); |
1136 | 40 cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); |
539 | 41 |
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42 if (pscf->auth_methods |
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43 & (NGX_MAIL_AUTH_APOP_ENABLED|NGX_MAIL_AUTH_CRAM_MD5_ENABLED)) |
800 | 44 { |
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45 if (ngx_mail_salt(s, c, cscf) != NGX_OK) { |
1136 | 46 ngx_mail_session_internal_server_error(s); |
800 | 47 return; |
48 } | |
49 | |
2049 | 50 s->out.data = ngx_pnalloc(c->pool, sizeof(pop3_greeting) + s->salt.len); |
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51 if (s->out.data == NULL) { |
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52 ngx_mail_session_internal_server_error(s); |
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53 return; |
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54 } |
800 | 55 |
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56 p = ngx_cpymem(s->out.data, pop3_greeting, sizeof(pop3_greeting) - 3); |
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57 *p++ = ' '; |
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58 p = ngx_cpymem(p, s->salt.data, s->salt.len); |
800 | 59 |
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60 s->out.len = p - s->out.data; |
800 | 61 |
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62 } else { |
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63 ngx_str_set(&s->out, pop3_greeting); |
800 | 64 } |
65 | |
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66 c->read->handler = ngx_mail_pop3_init_protocol; |
539 | 67 |
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68 ngx_add_timer(c->read, cscf->timeout); |
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69 |
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70 if (ngx_handle_read_event(c->read, 0) != NGX_OK) { |
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71 ngx_mail_close_connection(c); |
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72 } |
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73 |
1136 | 74 ngx_mail_send(c->write); |
539 | 75 } |
76 | |
77 | |
78 void | |
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79 ngx_mail_pop3_init_protocol(ngx_event_t *rev) |
539 | 80 { |
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81 ngx_connection_t *c; |
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82 ngx_mail_session_t *s; |
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83 |
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84 c = rev->data; |
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85 |
541 | 86 c->log->action = "in auth state"; |
87 | |
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88 if (rev->timedout) { |
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89 ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, "client timed out"); |
577 | 90 c->timedout = 1; |
1136 | 91 ngx_mail_close_connection(c); |
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92 return; |
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93 } |
420
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94 |
539 | 95 s = c->data; |
521 | 96 |
419
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97 if (s->buffer == NULL) { |
583 | 98 if (ngx_array_init(&s->args, c->pool, 2, sizeof(ngx_str_t)) |
99 == NGX_ERROR) | |
100 { | |
1136 | 101 ngx_mail_session_internal_server_error(s); |
583 | 102 return; |
103 } | |
104 | |
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105 s->buffer = ngx_create_temp_buf(c->pool, 128); |
583 | 106 if (s->buffer == NULL) { |
1136 | 107 ngx_mail_session_internal_server_error(s); |
583 | 108 return; |
109 } | |
419
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110 } |
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111 |
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112 s->mail_state = ngx_pop3_start; |
1477 | 113 c->read->handler = ngx_mail_pop3_auth_state; |
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114 |
1477 | 115 ngx_mail_pop3_auth_state(rev); |
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116 } |
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118 |
527 | 119 void |
1477 | 120 ngx_mail_pop3_auth_state(ngx_event_t *rev) |
521 | 121 { |
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122 ngx_int_t rc; |
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123 ngx_connection_t *c; |
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124 ngx_mail_session_t *s; |
521 | 125 |
126 c = rev->data; | |
527 | 127 s = c->data; |
521 | 128 |
1136 | 129 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, c->log, 0, "pop3 auth state"); |
527 | 130 |
131 if (rev->timedout) { | |
132 ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, "client timed out"); | |
577 | 133 c->timedout = 1; |
1136 | 134 ngx_mail_close_connection(c); |
527 | 135 return; |
136 } | |
137 | |
539 | 138 if (s->out.len) { |
1136 | 139 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, c->log, 0, "pop3 send handler busy"); |
539 | 140 s->blocked = 1; |
141 return; | |
142 } | |
143 | |
144 s->blocked = 0; | |
145 | |
1482 | 146 rc = ngx_mail_read_command(s, c); |
1136 | 147 |
148 if (rc == NGX_AGAIN || rc == NGX_ERROR) { | |
149 return; | |
150 } | |
151 | |
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152 ngx_str_set(&s->out, pop3_ok); |
1136 | 153 |
154 if (rc == NGX_OK) { | |
155 switch (s->mail_state) { | |
156 | |
157 case ngx_pop3_start: | |
158 | |
159 switch (s->command) { | |
160 | |
161 case NGX_POP3_USER: | |
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162 rc = ngx_mail_pop3_user(s, c); |
1136 | 163 break; |
164 | |
165 case NGX_POP3_CAPA: | |
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166 rc = ngx_mail_pop3_capa(s, c, 1); |
1136 | 167 break; |
168 | |
169 case NGX_POP3_APOP: | |
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170 rc = ngx_mail_pop3_apop(s, c); |
1136 | 171 break; |
172 | |
173 case NGX_POP3_AUTH: | |
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174 rc = ngx_mail_pop3_auth(s, c); |
1136 | 175 break; |
176 | |
177 case NGX_POP3_QUIT: | |
178 s->quit = 1; | |
179 break; | |
180 | |
181 case NGX_POP3_NOOP: | |
182 break; | |
183 | |
184 case NGX_POP3_STLS: | |
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185 rc = ngx_mail_pop3_stls(s, c); |
1136 | 186 break; |
187 | |
188 default: | |
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189 rc = NGX_MAIL_PARSE_INVALID_COMMAND; |
1136 | 190 break; |
191 } | |
192 | |
193 break; | |
194 | |
195 case ngx_pop3_user: | |
196 | |
197 switch (s->command) { | |
198 | |
199 case NGX_POP3_PASS: | |
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200 rc = ngx_mail_pop3_pass(s, c); |
1136 | 201 break; |
202 | |
203 case NGX_POP3_CAPA: | |
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204 rc = ngx_mail_pop3_capa(s, c, 0); |
1136 | 205 break; |
206 | |
207 case NGX_POP3_QUIT: | |
208 s->quit = 1; | |
209 break; | |
210 | |
211 case NGX_POP3_NOOP: | |
212 break; | |
213 | |
214 default: | |
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215 rc = NGX_MAIL_PARSE_INVALID_COMMAND; |
1136 | 216 break; |
217 } | |
218 | |
219 break; | |
220 | |
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221 /* suppress warnings */ |
1136 | 222 case ngx_pop3_passwd: |
223 break; | |
224 | |
225 case ngx_pop3_auth_login_username: | |
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226 rc = ngx_mail_auth_login_username(s, c, 0); |
1136 | 227 |
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228 ngx_str_set(&s->out, pop3_password); |
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229 s->mail_state = ngx_pop3_auth_login_password; |
1136 | 230 break; |
231 | |
232 case ngx_pop3_auth_login_password: | |
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233 rc = ngx_mail_auth_login_password(s, c); |
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234 break; |
1136 | 235 |
236 case ngx_pop3_auth_plain: | |
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237 rc = ngx_mail_auth_plain(s, c, 0); |
1136 | 238 break; |
239 | |
240 case ngx_pop3_auth_cram_md5: | |
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241 rc = ngx_mail_auth_cram_md5(s, c); |
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242 break; |
1136 | 243 } |
244 } | |
245 | |
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246 switch (rc) { |
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247 |
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248 case NGX_DONE: |
1482 | 249 ngx_mail_auth(s, c); |
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250 return; |
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251 |
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252 case NGX_ERROR: |
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253 ngx_mail_session_internal_server_error(s); |
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254 return; |
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255 |
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256 case NGX_MAIL_PARSE_INVALID_COMMAND: |
1136 | 257 s->mail_state = ngx_pop3_start; |
258 s->state = 0; | |
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259 |
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260 ngx_str_set(&s->out, pop3_invalid_command); |
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261 |
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262 /* fall through */ |
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263 |
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264 case NGX_OK: |
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265 |
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266 s->args.nelts = 0; |
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267 s->buffer->pos = s->buffer->start; |
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268 s->buffer->last = s->buffer->start; |
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269 |
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270 if (s->state) { |
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271 s->arg_start = s->buffer->start; |
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272 } |
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273 |
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274 ngx_mail_send(c->write); |
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275 } |
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276 } |
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277 |
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278 static ngx_int_t |
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279 ngx_mail_pop3_user(ngx_mail_session_t *s, ngx_connection_t *c) |
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280 { |
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281 ngx_str_t *arg; |
1479 | 282 |
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283 #if (NGX_MAIL_SSL) |
1479 | 284 if (ngx_mail_starttls_only(s, c)) { |
285 return NGX_MAIL_PARSE_INVALID_COMMAND; | |
1136 | 286 } |
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287 #endif |
1136 | 288 |
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289 if (s->args.nelts != 1) { |
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290 return NGX_MAIL_PARSE_INVALID_COMMAND; |
1136 | 291 } |
292 | |
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293 arg = s->args.elts; |
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294 s->login.len = arg[0].len; |
2049 | 295 s->login.data = ngx_pnalloc(c->pool, s->login.len); |
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296 if (s->login.data == NULL) { |
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297 return NGX_ERROR; |
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298 } |
1136 | 299 |
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300 ngx_memcpy(s->login.data, arg[0].data, s->login.len); |
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301 |
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302 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, |
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303 "pop3 login: \"%V\"", &s->login); |
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304 |
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305 s->mail_state = ngx_pop3_user; |
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306 |
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307 return NGX_OK; |
1136 | 308 } |
309 | |
310 | |
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311 static ngx_int_t |
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312 ngx_mail_pop3_pass(ngx_mail_session_t *s, ngx_connection_t *c) |
1136 | 313 { |
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314 ngx_str_t *arg; |
1136 | 315 |
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316 if (s->args.nelts != 1) { |
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317 return NGX_MAIL_PARSE_INVALID_COMMAND; |
527 | 318 } |
319 | |
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320 arg = s->args.elts; |
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321 s->passwd.len = arg[0].len; |
2049 | 322 s->passwd.data = ngx_pnalloc(c->pool, s->passwd.len); |
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323 if (s->passwd.data == NULL) { |
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324 return NGX_ERROR; |
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325 } |
1323 | 326 |
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327 ngx_memcpy(s->passwd.data, arg[0].data, s->passwd.len); |
1323 | 328 |
329 #if (NGX_DEBUG_MAIL_PASSWD) | |
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330 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, |
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331 "pop3 passwd: \"%V\"", &s->passwd); |
1323 | 332 #endif |
333 | |
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334 return NGX_DONE; |
521 | 335 } |
336 | |
337 | |
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338 static ngx_int_t |
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339 ngx_mail_pop3_capa(ngx_mail_session_t *s, ngx_connection_t *c, ngx_int_t stls) |
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340 { |
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341 ngx_mail_pop3_srv_conf_t *pscf; |
420
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342 |
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343 pscf = ngx_mail_get_module_srv_conf(s, ngx_mail_pop3_module); |
809 | 344 |
1322 | 345 #if (NGX_MAIL_SSL) |
346 | |
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347 if (stls && c->ssl == NULL) { |
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348 ngx_mail_ssl_conf_t *sslcf; |
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349 |
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350 sslcf = ngx_mail_get_module_srv_conf(s, ngx_mail_ssl_module); |
1322 | 351 |
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352 if (sslcf->starttls == NGX_MAIL_STARTTLS_ON) { |
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353 s->out = pscf->starttls_capability; |
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354 return NGX_OK; |
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355 } |
809 | 356 |
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357 if (sslcf->starttls == NGX_MAIL_STARTTLS_ONLY) { |
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358 s->out = pscf->starttls_only_capability; |
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359 return NGX_OK; |
421
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360 } |
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361 } |
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362 |
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363 #endif |
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364 |
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365 s->out = pscf->capability; |
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366 return NGX_OK; |
417
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367 } |
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368 |
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369 |
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370 static ngx_int_t |
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371 ngx_mail_pop3_stls(ngx_mail_session_t *s, ngx_connection_t *c) |
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372 { |
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373 #if (NGX_MAIL_SSL) |
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374 ngx_mail_ssl_conf_t *sslcf; |
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375 |
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376 if (c->ssl == NULL) { |
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377 sslcf = ngx_mail_get_module_srv_conf(s, ngx_mail_ssl_module); |
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378 if (sslcf->starttls) { |
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379 c->read->handler = ngx_mail_starttls_handler; |
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380 return NGX_OK; |
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381 } |
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382 } |
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383 |
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384 #endif |
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385 |
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386 return NGX_MAIL_PARSE_INVALID_COMMAND; |
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387 } |
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388 |
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389 |
521 | 390 static ngx_int_t |
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391 ngx_mail_pop3_apop(ngx_mail_session_t *s, ngx_connection_t *c) |
420
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392 { |
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393 ngx_str_t *arg; |
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394 ngx_mail_pop3_srv_conf_t *pscf; |
1479 | 395 |
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396 #if (NGX_MAIL_SSL) |
1479 | 397 if (ngx_mail_starttls_only(s, c)) { |
398 return NGX_MAIL_PARSE_INVALID_COMMAND; | |
539 | 399 } |
400 #endif | |
401 | |
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402 if (s->args.nelts != 2) { |
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403 return NGX_MAIL_PARSE_INVALID_COMMAND; |
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404 } |
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405 |
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406 pscf = ngx_mail_get_module_srv_conf(s, ngx_mail_pop3_module); |
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407 |
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408 if (!(pscf->auth_methods & NGX_MAIL_AUTH_APOP_ENABLED)) { |
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409 return NGX_MAIL_PARSE_INVALID_COMMAND; |
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410 } |
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411 |
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412 arg = s->args.elts; |
543 | 413 |
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414 s->login.len = arg[0].len; |
2049 | 415 s->login.data = ngx_pnalloc(c->pool, s->login.len); |
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416 if (s->login.data == NULL) { |
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417 return NGX_ERROR; |
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418 } |
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419 |
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420 ngx_memcpy(s->login.data, arg[0].data, s->login.len); |
479 | 421 |
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422 s->passwd.len = arg[1].len; |
2049 | 423 s->passwd.data = ngx_pnalloc(c->pool, s->passwd.len); |
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424 if (s->passwd.data == NULL) { |
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425 return NGX_ERROR; |
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426 } |
479 | 427 |
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428 ngx_memcpy(s->passwd.data, arg[1].data, s->passwd.len); |
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429 |
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430 ngx_log_debug2(NGX_LOG_DEBUG_MAIL, c->log, 0, |
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431 "pop3 apop: \"%V\" \"%V\"", &s->login, &s->passwd); |
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432 |
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433 s->auth_method = NGX_MAIL_AUTH_APOP; |
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434 |
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435 return NGX_DONE; |
417
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436 } |
539 | 437 |
438 | |
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439 static ngx_int_t |
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440 ngx_mail_pop3_auth(ngx_mail_session_t *s, ngx_connection_t *c) |
541 | 441 { |
1479 | 442 ngx_int_t rc; |
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443 ngx_mail_pop3_srv_conf_t *pscf; |
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444 |
1479 | 445 #if (NGX_MAIL_SSL) |
446 if (ngx_mail_starttls_only(s, c)) { | |
447 return NGX_MAIL_PARSE_INVALID_COMMAND; | |
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448 } |
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449 #endif |
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450 |
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451 pscf = ngx_mail_get_module_srv_conf(s, ngx_mail_pop3_module); |
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452 |
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453 if (s->args.nelts == 0) { |
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454 s->out = pscf->auth_capability; |
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455 s->state = 0; |
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456 |
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457 return NGX_OK; |
541 | 458 } |
577 | 459 |
1479 | 460 rc = ngx_mail_auth_parse(s, c); |
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461 |
1479 | 462 switch (rc) { |
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463 |
1479 | 464 case NGX_MAIL_AUTH_LOGIN: |
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465 |
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466 ngx_str_set(&s->out, pop3_username); |
1479 | 467 s->mail_state = ngx_pop3_auth_login_username; |
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468 |
1479 | 469 return NGX_OK; |
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470 |
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471 case NGX_MAIL_AUTH_LOGIN_USERNAME: |
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472 |
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473 ngx_str_set(&s->out, pop3_password); |
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474 s->mail_state = ngx_pop3_auth_login_password; |
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475 |
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476 return ngx_mail_auth_login_username(s, c, 1); |
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477 |
1479 | 478 case NGX_MAIL_AUTH_PLAIN: |
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479 |
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480 ngx_str_set(&s->out, pop3_next); |
1479 | 481 s->mail_state = ngx_pop3_auth_plain; |
541 | 482 |
1479 | 483 return NGX_OK; |
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484 |
1479 | 485 case NGX_MAIL_AUTH_CRAM_MD5: |
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486 |
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487 if (!(pscf->auth_methods & NGX_MAIL_AUTH_CRAM_MD5_ENABLED)) { |
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488 return NGX_MAIL_PARSE_INVALID_COMMAND; |
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489 } |
541 | 490 |
1479 | 491 if (ngx_mail_auth_cram_md5_salt(s, c, "+ ", 2) == NGX_OK) { |
492 s->mail_state = ngx_pop3_auth_cram_md5; | |
493 return NGX_OK; | |
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494 } |
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495 |
1479 | 496 return NGX_ERROR; |
541 | 497 } |
498 | |
1479 | 499 return rc; |
541 | 500 } |