Mercurial > hg > nginx
annotate src/mail/ngx_mail_pop3_handler.c @ 1479:2647950e047f
optimizations
author | Igor Sysoev <igor@sysoev.ru> |
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date | Thu, 13 Sep 2007 21:24:27 +0000 |
parents | 59e1caf2be94 |
children | a231e37a19ab |
rev | line source |
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1 |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
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4 */ |
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7 #include <ngx_config.h> |
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8 #include <ngx_core.h> |
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9 #include <ngx_event.h> |
1136 | 10 #include <ngx_mail.h> |
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12 |
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13 static ngx_int_t ngx_mail_pop3_user(ngx_mail_session_t *s, ngx_connection_t *c); |
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14 static ngx_int_t ngx_mail_pop3_pass(ngx_mail_session_t *s, ngx_connection_t *c); |
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15 static ngx_int_t ngx_mail_pop3_capa(ngx_mail_session_t *s, ngx_connection_t *c, |
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16 ngx_int_t stls); |
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17 static ngx_int_t ngx_mail_pop3_stls(ngx_mail_session_t *s, ngx_connection_t *c); |
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18 static ngx_int_t ngx_mail_pop3_apop(ngx_mail_session_t *s, ngx_connection_t *c); |
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19 static ngx_int_t ngx_mail_pop3_auth(ngx_mail_session_t *s, ngx_connection_t *c); |
539 | 20 |
413
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21 |
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22 static u_char pop3_greeting[] = "+OK POP3 ready" CRLF; |
521 | 23 static u_char pop3_ok[] = "+OK" CRLF; |
809 | 24 static u_char pop3_next[] = "+ " CRLF; |
25 static u_char pop3_username[] = "+ VXNlcm5hbWU6" CRLF; | |
26 static u_char pop3_password[] = "+ UGFzc3dvcmQ6" CRLF; | |
521 | 27 static u_char pop3_invalid_command[] = "-ERR invalid command" CRLF; |
28 | |
29 | |
30 void | |
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31 ngx_mail_pop3_init_session(ngx_mail_session_t *s, ngx_connection_t *c) |
541 | 32 { |
800 | 33 u_char *p; |
1136 | 34 ngx_mail_core_srv_conf_t *cscf; |
417
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35 |
1136 | 36 cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); |
539 | 37 |
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38 if (cscf->pop3_auth_methods |
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39 & (NGX_MAIL_AUTH_APOP_ENABLED|NGX_MAIL_AUTH_CRAM_MD5_ENABLED)) |
800 | 40 { |
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41 if (ngx_mail_salt(s, c, cscf) != NGX_OK) { |
1136 | 42 ngx_mail_session_internal_server_error(s); |
800 | 43 return; |
44 } | |
45 | |
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46 s->out.data = ngx_palloc(c->pool, sizeof(pop3_greeting) + s->salt.len); |
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47 if (s->out.data == NULL) { |
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48 ngx_mail_session_internal_server_error(s); |
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49 return; |
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50 } |
800 | 51 |
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52 p = ngx_cpymem(s->out.data, pop3_greeting, sizeof(pop3_greeting) - 3); |
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53 *p++ = ' '; |
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54 p = ngx_cpymem(p, s->salt.data, s->salt.len); |
800 | 55 |
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56 s->out.len = p - s->out.data; |
800 | 57 |
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58 } else { |
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59 s->out.len = sizeof(pop3_greeting) - 1; |
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60 s->out.data = pop3_greeting; |
800 | 61 } |
62 | |
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63 c->read->handler = ngx_mail_pop3_init_protocol; |
539 | 64 |
1136 | 65 ngx_mail_send(c->write); |
539 | 66 } |
67 | |
68 | |
69 void | |
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70 ngx_mail_pop3_init_protocol(ngx_event_t *rev) |
539 | 71 { |
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72 ngx_connection_t *c; |
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73 ngx_mail_session_t *s; |
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74 |
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75 c = rev->data; |
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76 |
541 | 77 c->log->action = "in auth state"; |
78 | |
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79 if (rev->timedout) { |
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80 ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, "client timed out"); |
577 | 81 c->timedout = 1; |
1136 | 82 ngx_mail_close_connection(c); |
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83 return; |
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84 } |
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85 |
539 | 86 s = c->data; |
521 | 87 |
419
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88 if (s->buffer == NULL) { |
583 | 89 if (ngx_array_init(&s->args, c->pool, 2, sizeof(ngx_str_t)) |
90 == NGX_ERROR) | |
91 { | |
1136 | 92 ngx_mail_session_internal_server_error(s); |
583 | 93 return; |
94 } | |
95 | |
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96 s->buffer = ngx_create_temp_buf(c->pool, 128); |
583 | 97 if (s->buffer == NULL) { |
1136 | 98 ngx_mail_session_internal_server_error(s); |
583 | 99 return; |
100 } | |
419
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101 } |
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102 |
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103 s->mail_state = ngx_pop3_start; |
1477 | 104 c->read->handler = ngx_mail_pop3_auth_state; |
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105 |
1477 | 106 ngx_mail_pop3_auth_state(rev); |
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107 } |
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108 |
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109 |
527 | 110 void |
1477 | 111 ngx_mail_pop3_auth_state(ngx_event_t *rev) |
521 | 112 { |
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113 ngx_int_t rc; |
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114 ngx_connection_t *c; |
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115 ngx_mail_session_t *s; |
521 | 116 |
117 c = rev->data; | |
527 | 118 s = c->data; |
521 | 119 |
1136 | 120 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, c->log, 0, "pop3 auth state"); |
527 | 121 |
122 if (rev->timedout) { | |
123 ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, "client timed out"); | |
577 | 124 c->timedout = 1; |
1136 | 125 ngx_mail_close_connection(c); |
527 | 126 return; |
127 } | |
128 | |
539 | 129 if (s->out.len) { |
1136 | 130 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, c->log, 0, "pop3 send handler busy"); |
539 | 131 s->blocked = 1; |
132 return; | |
133 } | |
134 | |
135 s->blocked = 0; | |
136 | |
1136 | 137 rc = ngx_mail_read_command(s); |
138 | |
139 if (rc == NGX_AGAIN || rc == NGX_ERROR) { | |
140 return; | |
141 } | |
142 | |
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143 s->out.len = sizeof(pop3_ok) - 1; |
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144 s->out.data = pop3_ok; |
1136 | 145 |
146 if (rc == NGX_OK) { | |
147 switch (s->mail_state) { | |
148 | |
149 case ngx_pop3_start: | |
150 | |
151 switch (s->command) { | |
152 | |
153 case NGX_POP3_USER: | |
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154 rc = ngx_mail_pop3_user(s, c); |
1136 | 155 break; |
156 | |
157 case NGX_POP3_CAPA: | |
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158 rc = ngx_mail_pop3_capa(s, c, 1); |
1136 | 159 break; |
160 | |
161 case NGX_POP3_APOP: | |
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162 rc = ngx_mail_pop3_apop(s, c); |
1136 | 163 break; |
164 | |
165 case NGX_POP3_AUTH: | |
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166 rc = ngx_mail_pop3_auth(s, c); |
1136 | 167 break; |
168 | |
169 case NGX_POP3_QUIT: | |
170 s->quit = 1; | |
171 break; | |
172 | |
173 case NGX_POP3_NOOP: | |
174 break; | |
175 | |
176 case NGX_POP3_STLS: | |
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177 rc = ngx_mail_pop3_stls(s, c); |
1136 | 178 break; |
179 | |
180 default: | |
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181 rc = NGX_MAIL_PARSE_INVALID_COMMAND; |
1136 | 182 s->mail_state = ngx_pop3_start; |
183 break; | |
184 } | |
185 | |
186 break; | |
187 | |
188 case ngx_pop3_user: | |
189 | |
190 switch (s->command) { | |
191 | |
192 case NGX_POP3_PASS: | |
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193 rc = ngx_mail_pop3_pass(s, c); |
1136 | 194 break; |
195 | |
196 case NGX_POP3_CAPA: | |
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197 rc = ngx_mail_pop3_capa(s, c, 0); |
1136 | 198 break; |
199 | |
200 case NGX_POP3_QUIT: | |
201 s->quit = 1; | |
202 break; | |
203 | |
204 case NGX_POP3_NOOP: | |
205 break; | |
206 | |
207 default: | |
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208 rc = NGX_MAIL_PARSE_INVALID_COMMAND; |
1136 | 209 s->mail_state = ngx_pop3_start; |
210 break; | |
211 } | |
212 | |
213 break; | |
214 | |
215 /* suppress warinings */ | |
216 case ngx_pop3_passwd: | |
217 break; | |
218 | |
219 case ngx_pop3_auth_login_username: | |
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220 rc = ngx_mail_auth_login_username(s, c); |
1136 | 221 |
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222 s->out.len = sizeof(pop3_password) - 1; |
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223 s->out.data = pop3_password; |
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224 s->mail_state = ngx_pop3_auth_login_password; |
1136 | 225 break; |
226 | |
227 case ngx_pop3_auth_login_password: | |
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228 rc = ngx_mail_auth_login_password(s, c); |
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229 break; |
1136 | 230 |
231 case ngx_pop3_auth_plain: | |
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232 rc = ngx_mail_auth_plain(s, c, 0); |
1136 | 233 break; |
234 | |
235 case ngx_pop3_auth_cram_md5: | |
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236 rc = ngx_mail_auth_cram_md5(s, c); |
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237 break; |
1136 | 238 } |
239 } | |
240 | |
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241 switch (rc) { |
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242 |
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243 case NGX_DONE: |
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244 ngx_mail_auth(s); |
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245 return; |
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246 |
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247 case NGX_ERROR: |
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248 ngx_mail_session_internal_server_error(s); |
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249 return; |
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250 |
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251 case NGX_MAIL_PARSE_INVALID_COMMAND: |
1136 | 252 s->mail_state = ngx_pop3_start; |
253 s->state = 0; | |
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254 |
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255 s->out.len = sizeof(pop3_invalid_command) - 1; |
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256 s->out.data = pop3_invalid_command; |
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257 |
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258 /* fall through */ |
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259 |
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260 case NGX_OK: |
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261 |
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262 s->args.nelts = 0; |
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263 s->buffer->pos = s->buffer->start; |
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264 s->buffer->last = s->buffer->start; |
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265 |
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266 if (s->state) { |
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267 s->arg_start = s->buffer->start; |
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268 } |
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269 |
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270 ngx_mail_send(c->write); |
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271 } |
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272 } |
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273 |
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274 static ngx_int_t |
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275 ngx_mail_pop3_user(ngx_mail_session_t *s, ngx_connection_t *c) |
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276 { |
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277 ngx_str_t *arg; |
1479 | 278 |
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279 #if (NGX_MAIL_SSL) |
1479 | 280 if (ngx_mail_starttls_only(s, c)) { |
281 return NGX_MAIL_PARSE_INVALID_COMMAND; | |
1136 | 282 } |
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283 #endif |
1136 | 284 |
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285 if (s->args.nelts != 1) { |
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286 return NGX_MAIL_PARSE_INVALID_COMMAND; |
1136 | 287 } |
288 | |
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289 arg = s->args.elts; |
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290 s->login.len = arg[0].len; |
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291 s->login.data = ngx_palloc(c->pool, s->login.len); |
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292 if (s->login.data == NULL) { |
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293 return NGX_ERROR; |
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294 } |
1136 | 295 |
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296 ngx_memcpy(s->login.data, arg[0].data, s->login.len); |
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297 |
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298 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, |
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299 "pop3 login: \"%V\"", &s->login); |
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300 |
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301 s->mail_state = ngx_pop3_user; |
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302 |
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303 return NGX_OK; |
1136 | 304 } |
305 | |
306 | |
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307 static ngx_int_t |
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308 ngx_mail_pop3_pass(ngx_mail_session_t *s, ngx_connection_t *c) |
1136 | 309 { |
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310 ngx_str_t *arg; |
1136 | 311 |
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312 if (s->args.nelts != 1) { |
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313 return NGX_MAIL_PARSE_INVALID_COMMAND; |
527 | 314 } |
315 | |
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316 arg = s->args.elts; |
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317 s->passwd.len = arg[0].len; |
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318 s->passwd.data = ngx_palloc(c->pool, s->passwd.len); |
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319 if (s->passwd.data == NULL) { |
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320 return NGX_ERROR; |
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321 } |
1323 | 322 |
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323 ngx_memcpy(s->passwd.data, arg[0].data, s->passwd.len); |
1323 | 324 |
325 #if (NGX_DEBUG_MAIL_PASSWD) | |
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326 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, |
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327 "pop3 passwd: \"%V\"", &s->passwd); |
1323 | 328 #endif |
329 | |
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330 return NGX_DONE; |
521 | 331 } |
332 | |
333 | |
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334 static ngx_int_t |
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335 ngx_mail_pop3_capa(ngx_mail_session_t *s, ngx_connection_t *c, ngx_int_t stls) |
420
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336 { |
1136 | 337 ngx_mail_core_srv_conf_t *cscf; |
1322 | 338 #if (NGX_MAIL_SSL) |
339 ngx_mail_ssl_conf_t *sslcf; | |
340 #endif | |
420
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341 |
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342 cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); |
809 | 343 |
1322 | 344 #if (NGX_MAIL_SSL) |
345 | |
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346 if (stls && c->ssl == NULL) { |
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347 sslcf = ngx_mail_get_module_srv_conf(s, ngx_mail_ssl_module); |
1322 | 348 |
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349 if (sslcf->starttls == NGX_MAIL_STARTTLS_ON) { |
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350 s->out = cscf->pop3_starttls_capability; |
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351 return NGX_OK; |
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352 } |
809 | 353 |
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354 if (sslcf->starttls == NGX_MAIL_STARTTLS_ONLY) { |
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355 s->out = cscf->pop3_starttls_only_capability; |
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356 return NGX_OK; |
421
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357 } |
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358 } |
420
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359 |
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360 #endif |
420
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361 |
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362 s->out = cscf->pop3_capability; |
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363 return NGX_OK; |
417
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364 } |
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365 |
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366 |
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367 static ngx_int_t |
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368 ngx_mail_pop3_stls(ngx_mail_session_t *s, ngx_connection_t *c) |
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369 { |
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370 #if (NGX_MAIL_SSL) |
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371 ngx_mail_ssl_conf_t *sslcf; |
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372 |
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373 if (c->ssl == NULL) { |
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374 sslcf = ngx_mail_get_module_srv_conf(s, ngx_mail_ssl_module); |
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375 if (sslcf->starttls) { |
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376 c->read->handler = ngx_mail_starttls_handler; |
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377 return NGX_OK; |
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378 } |
894
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379 } |
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380 |
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381 #endif |
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382 |
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383 return NGX_MAIL_PARSE_INVALID_COMMAND; |
855
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384 } |
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385 |
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386 |
521 | 387 static ngx_int_t |
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388 ngx_mail_pop3_apop(ngx_mail_session_t *s, ngx_connection_t *c) |
420
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389 { |
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390 ngx_str_t *arg; |
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391 ngx_mail_core_srv_conf_t *cscf; |
1479 | 392 |
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393 #if (NGX_MAIL_SSL) |
1479 | 394 if (ngx_mail_starttls_only(s, c)) { |
395 return NGX_MAIL_PARSE_INVALID_COMMAND; | |
539 | 396 } |
397 #endif | |
398 | |
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399 if (s->args.nelts != 2) { |
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400 return NGX_MAIL_PARSE_INVALID_COMMAND; |
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401 } |
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402 |
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403 cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); |
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404 |
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405 if (!(cscf->pop3_auth_methods & NGX_MAIL_AUTH_APOP_ENABLED)) { |
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406 return NGX_MAIL_PARSE_INVALID_COMMAND; |
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407 } |
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408 |
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409 arg = s->args.elts; |
543 | 410 |
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411 s->login.len = arg[0].len; |
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412 s->login.data = ngx_palloc(c->pool, s->login.len); |
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413 if (s->login.data == NULL) { |
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414 return NGX_ERROR; |
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415 } |
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416 |
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417 ngx_memcpy(s->login.data, arg[0].data, s->login.len); |
479 | 418 |
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419 s->passwd.len = arg[1].len; |
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420 s->passwd.data = ngx_palloc(c->pool, s->passwd.len); |
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421 if (s->passwd.data == NULL) { |
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422 return NGX_ERROR; |
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423 } |
479 | 424 |
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425 ngx_memcpy(s->passwd.data, arg[1].data, s->passwd.len); |
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426 |
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427 ngx_log_debug2(NGX_LOG_DEBUG_MAIL, c->log, 0, |
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428 "pop3 apop: \"%V\" \"%V\"", &s->login, &s->passwd); |
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429 |
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430 s->auth_method = NGX_MAIL_AUTH_APOP; |
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431 |
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432 return NGX_DONE; |
417
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433 } |
539 | 434 |
435 | |
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436 static ngx_int_t |
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437 ngx_mail_pop3_auth(ngx_mail_session_t *s, ngx_connection_t *c) |
541 | 438 { |
1479 | 439 ngx_int_t rc; |
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440 ngx_mail_core_srv_conf_t *cscf; |
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441 |
1479 | 442 #if (NGX_MAIL_SSL) |
443 if (ngx_mail_starttls_only(s, c)) { | |
444 return NGX_MAIL_PARSE_INVALID_COMMAND; | |
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445 } |
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446 #endif |
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447 |
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448 cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); |
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449 |
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450 if (s->args.nelts == 0) { |
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451 s->out = cscf->pop3_auth_capability; |
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452 s->state = 0; |
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453 |
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454 return NGX_OK; |
541 | 455 } |
577 | 456 |
1479 | 457 rc = ngx_mail_auth_parse(s, c); |
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458 |
1479 | 459 switch (rc) { |
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460 |
1479 | 461 case NGX_MAIL_AUTH_LOGIN: |
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462 |
1479 | 463 s->out.len = sizeof(pop3_username) - 1; |
464 s->out.data = pop3_username; | |
465 s->mail_state = ngx_pop3_auth_login_username; | |
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466 |
1479 | 467 return NGX_OK; |
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468 |
1479 | 469 case NGX_MAIL_AUTH_PLAIN: |
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470 |
1479 | 471 s->out.len = sizeof(pop3_next) - 1; |
472 s->out.data = pop3_next; | |
473 s->mail_state = ngx_pop3_auth_plain; | |
541 | 474 |
1479 | 475 return NGX_OK; |
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476 |
1479 | 477 case NGX_MAIL_AUTH_CRAM_MD5: |
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478 |
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479 if (!(cscf->pop3_auth_methods & NGX_MAIL_AUTH_CRAM_MD5_ENABLED)) { |
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480 return NGX_MAIL_PARSE_INVALID_COMMAND; |
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481 } |
541 | 482 |
1479 | 483 if (ngx_mail_auth_cram_md5_salt(s, c, "+ ", 2) == NGX_OK) { |
484 s->mail_state = ngx_pop3_auth_cram_md5; | |
485 return NGX_OK; | |
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486 } |
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487 |
1479 | 488 return NGX_ERROR; |
541 | 489 } |
490 | |
1479 | 491 return rc; |
541 | 492 } |