Mercurial > hg > nginx-quic
annotate src/mail/ngx_mail_pop3_handler.c @ 3508:05e964be70a2
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author | Igor Sysoev <igor@sysoev.ru> |
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date | Wed, 12 May 2010 15:56:54 +0000 |
parents | 4f9dd6d22acd |
children | dd1570b6f237 |
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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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11 #include <ngx_mail_pop3_module.h> |
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13 |
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14 static ngx_int_t ngx_mail_pop3_user(ngx_mail_session_t *s, ngx_connection_t *c); |
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15 static ngx_int_t ngx_mail_pop3_pass(ngx_mail_session_t *s, ngx_connection_t *c); |
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16 static ngx_int_t ngx_mail_pop3_capa(ngx_mail_session_t *s, ngx_connection_t *c, |
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17 ngx_int_t stls); |
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18 static ngx_int_t ngx_mail_pop3_stls(ngx_mail_session_t *s, ngx_connection_t *c); |
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19 static ngx_int_t ngx_mail_pop3_apop(ngx_mail_session_t *s, ngx_connection_t *c); |
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20 static ngx_int_t ngx_mail_pop3_auth(ngx_mail_session_t *s, ngx_connection_t *c); |
539 | 21 |
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22 |
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23 static u_char pop3_greeting[] = "+OK POP3 ready" CRLF; |
521 | 24 static u_char pop3_ok[] = "+OK" CRLF; |
809 | 25 static u_char pop3_next[] = "+ " CRLF; |
26 static u_char pop3_username[] = "+ VXNlcm5hbWU6" CRLF; | |
27 static u_char pop3_password[] = "+ UGFzc3dvcmQ6" CRLF; | |
521 | 28 static u_char pop3_invalid_command[] = "-ERR invalid command" CRLF; |
29 | |
30 | |
31 void | |
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32 ngx_mail_pop3_init_session(ngx_mail_session_t *s, ngx_connection_t *c) |
541 | 33 { |
800 | 34 u_char *p; |
1136 | 35 ngx_mail_core_srv_conf_t *cscf; |
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36 ngx_mail_pop3_srv_conf_t *pscf; |
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37 |
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38 pscf = ngx_mail_get_module_srv_conf(s, ngx_mail_pop3_module); |
1136 | 39 cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); |
539 | 40 |
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41 if (pscf->auth_methods |
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42 & (NGX_MAIL_AUTH_APOP_ENABLED|NGX_MAIL_AUTH_CRAM_MD5_ENABLED)) |
800 | 43 { |
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44 if (ngx_mail_salt(s, c, cscf) != NGX_OK) { |
1136 | 45 ngx_mail_session_internal_server_error(s); |
800 | 46 return; |
47 } | |
48 | |
2049 | 49 s->out.data = ngx_pnalloc(c->pool, sizeof(pop3_greeting) + s->salt.len); |
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50 if (s->out.data == NULL) { |
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51 ngx_mail_session_internal_server_error(s); |
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52 return; |
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53 } |
800 | 54 |
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55 p = ngx_cpymem(s->out.data, pop3_greeting, sizeof(pop3_greeting) - 3); |
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56 *p++ = ' '; |
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57 p = ngx_cpymem(p, s->salt.data, s->salt.len); |
800 | 58 |
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59 s->out.len = p - s->out.data; |
800 | 60 |
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61 } else { |
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62 s->out.len = sizeof(pop3_greeting) - 1; |
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63 s->out.data = 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 } |
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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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117 |
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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 s->out.len = sizeof(pop3_ok) - 1; |
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153 s->out.data = pop3_ok; |
1136 | 154 |
155 if (rc == NGX_OK) { | |
156 switch (s->mail_state) { | |
157 | |
158 case ngx_pop3_start: | |
159 | |
160 switch (s->command) { | |
161 | |
162 case NGX_POP3_USER: | |
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163 rc = ngx_mail_pop3_user(s, c); |
1136 | 164 break; |
165 | |
166 case NGX_POP3_CAPA: | |
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167 rc = ngx_mail_pop3_capa(s, c, 1); |
1136 | 168 break; |
169 | |
170 case NGX_POP3_APOP: | |
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171 rc = ngx_mail_pop3_apop(s, c); |
1136 | 172 break; |
173 | |
174 case NGX_POP3_AUTH: | |
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175 rc = ngx_mail_pop3_auth(s, c); |
1136 | 176 break; |
177 | |
178 case NGX_POP3_QUIT: | |
179 s->quit = 1; | |
180 break; | |
181 | |
182 case NGX_POP3_NOOP: | |
183 break; | |
184 | |
185 case NGX_POP3_STLS: | |
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186 rc = ngx_mail_pop3_stls(s, c); |
1136 | 187 break; |
188 | |
189 default: | |
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190 rc = NGX_MAIL_PARSE_INVALID_COMMAND; |
1136 | 191 break; |
192 } | |
193 | |
194 break; | |
195 | |
196 case ngx_pop3_user: | |
197 | |
198 switch (s->command) { | |
199 | |
200 case NGX_POP3_PASS: | |
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201 rc = ngx_mail_pop3_pass(s, c); |
1136 | 202 break; |
203 | |
204 case NGX_POP3_CAPA: | |
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205 rc = ngx_mail_pop3_capa(s, c, 0); |
1136 | 206 break; |
207 | |
208 case NGX_POP3_QUIT: | |
209 s->quit = 1; | |
210 break; | |
211 | |
212 case NGX_POP3_NOOP: | |
213 break; | |
214 | |
215 default: | |
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216 rc = NGX_MAIL_PARSE_INVALID_COMMAND; |
1136 | 217 break; |
218 } | |
219 | |
220 break; | |
221 | |
222 /* suppress warinings */ | |
223 case ngx_pop3_passwd: | |
224 break; | |
225 | |
226 case ngx_pop3_auth_login_username: | |
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227 rc = ngx_mail_auth_login_username(s, c, 0); |
1136 | 228 |
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229 s->out.len = sizeof(pop3_password) - 1; |
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230 s->out.data = pop3_password; |
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231 s->mail_state = ngx_pop3_auth_login_password; |
1136 | 232 break; |
233 | |
234 case ngx_pop3_auth_login_password: | |
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235 rc = ngx_mail_auth_login_password(s, c); |
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236 break; |
1136 | 237 |
238 case ngx_pop3_auth_plain: | |
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239 rc = ngx_mail_auth_plain(s, c, 0); |
1136 | 240 break; |
241 | |
242 case ngx_pop3_auth_cram_md5: | |
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243 rc = ngx_mail_auth_cram_md5(s, c); |
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244 break; |
1136 | 245 } |
246 } | |
247 | |
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248 switch (rc) { |
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249 |
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250 case NGX_DONE: |
1482 | 251 ngx_mail_auth(s, c); |
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252 return; |
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253 |
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254 case NGX_ERROR: |
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255 ngx_mail_session_internal_server_error(s); |
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256 return; |
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257 |
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258 case NGX_MAIL_PARSE_INVALID_COMMAND: |
1136 | 259 s->mail_state = ngx_pop3_start; |
260 s->state = 0; | |
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261 |
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262 s->out.len = sizeof(pop3_invalid_command) - 1; |
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263 s->out.data = pop3_invalid_command; |
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264 |
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265 /* fall through */ |
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266 |
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267 case NGX_OK: |
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268 |
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269 s->args.nelts = 0; |
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270 s->buffer->pos = s->buffer->start; |
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271 s->buffer->last = s->buffer->start; |
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272 |
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273 if (s->state) { |
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274 s->arg_start = s->buffer->start; |
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275 } |
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276 |
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277 ngx_mail_send(c->write); |
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278 } |
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279 } |
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280 |
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281 static ngx_int_t |
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282 ngx_mail_pop3_user(ngx_mail_session_t *s, ngx_connection_t *c) |
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283 { |
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284 ngx_str_t *arg; |
1479 | 285 |
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286 #if (NGX_MAIL_SSL) |
1479 | 287 if (ngx_mail_starttls_only(s, c)) { |
288 return NGX_MAIL_PARSE_INVALID_COMMAND; | |
1136 | 289 } |
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290 #endif |
1136 | 291 |
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292 if (s->args.nelts != 1) { |
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293 return NGX_MAIL_PARSE_INVALID_COMMAND; |
1136 | 294 } |
295 | |
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296 arg = s->args.elts; |
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297 s->login.len = arg[0].len; |
2049 | 298 s->login.data = ngx_pnalloc(c->pool, s->login.len); |
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299 if (s->login.data == NULL) { |
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300 return NGX_ERROR; |
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301 } |
1136 | 302 |
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303 ngx_memcpy(s->login.data, arg[0].data, s->login.len); |
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304 |
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305 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, |
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306 "pop3 login: \"%V\"", &s->login); |
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307 |
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308 s->mail_state = ngx_pop3_user; |
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309 |
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310 return NGX_OK; |
1136 | 311 } |
312 | |
313 | |
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314 static ngx_int_t |
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315 ngx_mail_pop3_pass(ngx_mail_session_t *s, ngx_connection_t *c) |
1136 | 316 { |
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317 ngx_str_t *arg; |
1136 | 318 |
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319 if (s->args.nelts != 1) { |
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320 return NGX_MAIL_PARSE_INVALID_COMMAND; |
527 | 321 } |
322 | |
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323 arg = s->args.elts; |
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324 s->passwd.len = arg[0].len; |
2049 | 325 s->passwd.data = ngx_pnalloc(c->pool, s->passwd.len); |
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326 if (s->passwd.data == NULL) { |
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327 return NGX_ERROR; |
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328 } |
1323 | 329 |
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330 ngx_memcpy(s->passwd.data, arg[0].data, s->passwd.len); |
1323 | 331 |
332 #if (NGX_DEBUG_MAIL_PASSWD) | |
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333 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, |
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334 "pop3 passwd: \"%V\"", &s->passwd); |
1323 | 335 #endif |
336 | |
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337 return NGX_DONE; |
521 | 338 } |
339 | |
340 | |
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341 static ngx_int_t |
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342 ngx_mail_pop3_capa(ngx_mail_session_t *s, ngx_connection_t *c, ngx_int_t stls) |
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343 { |
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344 ngx_mail_pop3_srv_conf_t *pscf; |
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345 |
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346 pscf = ngx_mail_get_module_srv_conf(s, ngx_mail_pop3_module); |
809 | 347 |
1322 | 348 #if (NGX_MAIL_SSL) |
349 | |
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350 if (stls && c->ssl == NULL) { |
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351 ngx_mail_ssl_conf_t *sslcf; |
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352 |
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353 sslcf = ngx_mail_get_module_srv_conf(s, ngx_mail_ssl_module); |
1322 | 354 |
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355 if (sslcf->starttls == NGX_MAIL_STARTTLS_ON) { |
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356 s->out = pscf->starttls_capability; |
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357 return NGX_OK; |
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358 } |
809 | 359 |
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360 if (sslcf->starttls == NGX_MAIL_STARTTLS_ONLY) { |
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361 s->out = pscf->starttls_only_capability; |
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362 return NGX_OK; |
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363 } |
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364 } |
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365 |
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366 #endif |
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367 |
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368 s->out = pscf->capability; |
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369 return NGX_OK; |
417
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370 } |
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371 |
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372 |
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373 static ngx_int_t |
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374 ngx_mail_pop3_stls(ngx_mail_session_t *s, ngx_connection_t *c) |
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375 { |
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376 #if (NGX_MAIL_SSL) |
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377 ngx_mail_ssl_conf_t *sslcf; |
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378 |
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379 if (c->ssl == NULL) { |
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380 sslcf = ngx_mail_get_module_srv_conf(s, ngx_mail_ssl_module); |
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381 if (sslcf->starttls) { |
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382 c->read->handler = ngx_mail_starttls_handler; |
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383 return NGX_OK; |
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384 } |
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385 } |
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386 |
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387 #endif |
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388 |
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389 return NGX_MAIL_PARSE_INVALID_COMMAND; |
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390 } |
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391 |
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392 |
521 | 393 static ngx_int_t |
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394 ngx_mail_pop3_apop(ngx_mail_session_t *s, ngx_connection_t *c) |
420
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395 { |
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396 ngx_str_t *arg; |
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397 ngx_mail_pop3_srv_conf_t *pscf; |
1479 | 398 |
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399 #if (NGX_MAIL_SSL) |
1479 | 400 if (ngx_mail_starttls_only(s, c)) { |
401 return NGX_MAIL_PARSE_INVALID_COMMAND; | |
539 | 402 } |
403 #endif | |
404 | |
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405 if (s->args.nelts != 2) { |
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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 pscf = ngx_mail_get_module_srv_conf(s, ngx_mail_pop3_module); |
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410 |
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411 if (!(pscf->auth_methods & NGX_MAIL_AUTH_APOP_ENABLED)) { |
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412 return NGX_MAIL_PARSE_INVALID_COMMAND; |
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413 } |
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414 |
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415 arg = s->args.elts; |
543 | 416 |
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417 s->login.len = arg[0].len; |
2049 | 418 s->login.data = ngx_pnalloc(c->pool, s->login.len); |
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419 if (s->login.data == NULL) { |
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420 return NGX_ERROR; |
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421 } |
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422 |
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423 ngx_memcpy(s->login.data, arg[0].data, s->login.len); |
479 | 424 |
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425 s->passwd.len = arg[1].len; |
2049 | 426 s->passwd.data = ngx_pnalloc(c->pool, s->passwd.len); |
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427 if (s->passwd.data == NULL) { |
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428 return NGX_ERROR; |
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429 } |
479 | 430 |
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431 ngx_memcpy(s->passwd.data, arg[1].data, s->passwd.len); |
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432 |
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433 ngx_log_debug2(NGX_LOG_DEBUG_MAIL, c->log, 0, |
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434 "pop3 apop: \"%V\" \"%V\"", &s->login, &s->passwd); |
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435 |
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436 s->auth_method = NGX_MAIL_AUTH_APOP; |
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437 |
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438 return NGX_DONE; |
417
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439 } |
539 | 440 |
441 | |
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442 static ngx_int_t |
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443 ngx_mail_pop3_auth(ngx_mail_session_t *s, ngx_connection_t *c) |
541 | 444 { |
1479 | 445 ngx_int_t rc; |
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446 ngx_mail_pop3_srv_conf_t *pscf; |
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447 |
1479 | 448 #if (NGX_MAIL_SSL) |
449 if (ngx_mail_starttls_only(s, c)) { | |
450 return NGX_MAIL_PARSE_INVALID_COMMAND; | |
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451 } |
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452 #endif |
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453 |
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454 pscf = ngx_mail_get_module_srv_conf(s, ngx_mail_pop3_module); |
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455 |
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456 if (s->args.nelts == 0) { |
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457 s->out = pscf->auth_capability; |
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458 s->state = 0; |
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459 |
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460 return NGX_OK; |
541 | 461 } |
577 | 462 |
1479 | 463 rc = ngx_mail_auth_parse(s, c); |
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464 |
1479 | 465 switch (rc) { |
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466 |
1479 | 467 case NGX_MAIL_AUTH_LOGIN: |
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468 |
1479 | 469 s->out.len = sizeof(pop3_username) - 1; |
470 s->out.data = pop3_username; | |
471 s->mail_state = ngx_pop3_auth_login_username; | |
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472 |
1479 | 473 return NGX_OK; |
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474 |
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475 case NGX_MAIL_AUTH_LOGIN_USERNAME: |
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476 |
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477 s->out.len = sizeof(pop3_password) - 1; |
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478 s->out.data = pop3_password; |
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479 s->mail_state = ngx_pop3_auth_login_password; |
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480 |
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481 return ngx_mail_auth_login_username(s, c, 1); |
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482 |
1479 | 483 case NGX_MAIL_AUTH_PLAIN: |
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484 |
1479 | 485 s->out.len = sizeof(pop3_next) - 1; |
486 s->out.data = pop3_next; | |
487 s->mail_state = ngx_pop3_auth_plain; | |
541 | 488 |
1479 | 489 return NGX_OK; |
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490 |
1479 | 491 case NGX_MAIL_AUTH_CRAM_MD5: |
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492 |
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493 if (!(pscf->auth_methods & NGX_MAIL_AUTH_CRAM_MD5_ENABLED)) { |
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494 return NGX_MAIL_PARSE_INVALID_COMMAND; |
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495 } |
541 | 496 |
1479 | 497 if (ngx_mail_auth_cram_md5_salt(s, c, "+ ", 2) == NGX_OK) { |
498 s->mail_state = ngx_pop3_auth_cram_md5; | |
499 return NGX_OK; | |
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500 } |
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501 |
1479 | 502 return NGX_ERROR; |
541 | 503 } |
504 | |
1479 | 505 return rc; |
541 | 506 } |