Mercurial > hg > nginx
annotate src/mail/ngx_mail_pop3_handler.c @ 1476:67578e966dcc
split pop3, imap, and smtp handlers
author | Igor Sysoev <igor@sysoev.ru> |
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date | Thu, 13 Sep 2007 20:13:18 +0000 |
parents | src/mail/ngx_mail_handler.c@32450a2bbdf4 |
children | 59e1caf2be94 |
rev | line source |
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1 |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
441
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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 |
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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; |
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104 c->read->handler = ngx_pop3_auth_state; |
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105 |
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106 ngx_pop3_auth_state(rev); |
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107 } |
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108 |
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109 |
527 | 110 void |
1136 | 111 ngx_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; |
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278 #if (NGX_MAIL_SSL) |
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279 ngx_mail_ssl_conf_t *sslcf; |
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280 |
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281 if (c->ssl == NULL) { |
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282 sslcf = ngx_mail_get_module_srv_conf(s, ngx_mail_ssl_module); |
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283 |
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284 if (sslcf->starttls == NGX_MAIL_STARTTLS_ONLY) { |
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285 return NGX_MAIL_PARSE_INVALID_COMMAND; |
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286 } |
1136 | 287 } |
288 | |
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289 #endif |
1136 | 290 |
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291 if (s->args.nelts != 1) { |
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292 return NGX_MAIL_PARSE_INVALID_COMMAND; |
1136 | 293 } |
294 | |
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295 arg = s->args.elts; |
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296 s->login.len = arg[0].len; |
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297 s->login.data = ngx_palloc(c->pool, s->login.len); |
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298 if (s->login.data == NULL) { |
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299 return NGX_ERROR; |
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300 } |
1136 | 301 |
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302 ngx_memcpy(s->login.data, arg[0].data, s->login.len); |
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303 |
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304 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, |
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305 "pop3 login: \"%V\"", &s->login); |
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306 |
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307 s->mail_state = ngx_pop3_user; |
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308 |
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309 return NGX_OK; |
1136 | 310 } |
311 | |
312 | |
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313 static ngx_int_t |
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314 ngx_mail_pop3_pass(ngx_mail_session_t *s, ngx_connection_t *c) |
1136 | 315 { |
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316 ngx_str_t *arg; |
1136 | 317 |
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318 if (s->args.nelts != 1) { |
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319 return NGX_MAIL_PARSE_INVALID_COMMAND; |
527 | 320 } |
321 | |
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322 arg = s->args.elts; |
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323 s->passwd.len = arg[0].len; |
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324 s->passwd.data = ngx_palloc(c->pool, s->passwd.len); |
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325 if (s->passwd.data == NULL) { |
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326 return NGX_ERROR; |
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327 } |
1323 | 328 |
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329 ngx_memcpy(s->passwd.data, arg[0].data, s->passwd.len); |
1323 | 330 |
331 #if (NGX_DEBUG_MAIL_PASSWD) | |
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332 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, |
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333 "pop3 passwd: \"%V\"", &s->passwd); |
1323 | 334 #endif |
335 | |
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336 return NGX_DONE; |
521 | 337 } |
338 | |
339 | |
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340 static ngx_int_t |
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341 ngx_mail_pop3_capa(ngx_mail_session_t *s, ngx_connection_t *c, ngx_int_t stls) |
420
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342 { |
1136 | 343 ngx_mail_core_srv_conf_t *cscf; |
1322 | 344 #if (NGX_MAIL_SSL) |
345 ngx_mail_ssl_conf_t *sslcf; | |
346 #endif | |
420
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347 |
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348 cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); |
809 | 349 |
1322 | 350 #if (NGX_MAIL_SSL) |
351 | |
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352 if (stls && c->ssl == NULL) { |
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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 = cscf->pop3_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 = cscf->pop3_starttls_only_capability; |
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362 return NGX_OK; |
421
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363 } |
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364 } |
420
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365 |
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366 #endif |
420
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367 |
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368 s->out = cscf->pop3_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) |
894
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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; |
855
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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_core_srv_conf_t *cscf; |
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398 #if (NGX_MAIL_SSL) |
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399 ngx_mail_ssl_conf_t *sslcf; |
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400 |
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401 if (c->ssl == NULL) { |
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402 sslcf = ngx_mail_get_module_srv_conf(s, ngx_mail_ssl_module); |
420
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403 |
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404 if (sslcf->starttls == NGX_MAIL_STARTTLS_ONLY) { |
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405 return NGX_MAIL_PARSE_INVALID_COMMAND; |
539 | 406 } |
407 } | |
408 | |
409 #endif | |
410 | |
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411 if (s->args.nelts != 2) { |
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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 cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); |
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416 |
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417 if (!(cscf->pop3_auth_methods & NGX_MAIL_AUTH_APOP_ENABLED)) { |
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418 return NGX_MAIL_PARSE_INVALID_COMMAND; |
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419 } |
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420 |
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421 arg = s->args.elts; |
543 | 422 |
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423 s->login.len = arg[0].len; |
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424 s->login.data = ngx_palloc(c->pool, s->login.len); |
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425 if (s->login.data == NULL) { |
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426 return NGX_ERROR; |
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427 } |
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428 |
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429 ngx_memcpy(s->login.data, arg[0].data, s->login.len); |
479 | 430 |
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431 s->passwd.len = arg[1].len; |
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432 s->passwd.data = ngx_palloc(c->pool, s->passwd.len); |
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433 if (s->passwd.data == NULL) { |
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434 return NGX_ERROR; |
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435 } |
479 | 436 |
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437 ngx_memcpy(s->passwd.data, arg[1].data, s->passwd.len); |
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438 |
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439 ngx_log_debug2(NGX_LOG_DEBUG_MAIL, c->log, 0, |
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440 "pop3 apop: \"%V\" \"%V\"", &s->login, &s->passwd); |
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441 |
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442 s->auth_method = NGX_MAIL_AUTH_APOP; |
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443 |
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444 return NGX_DONE; |
417
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445 } |
539 | 446 |
447 | |
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448 static ngx_int_t |
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449 ngx_mail_pop3_auth(ngx_mail_session_t *s, ngx_connection_t *c) |
541 | 450 { |
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451 size_t n; |
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452 u_char *p; |
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453 ngx_str_t *arg, salt; |
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454 ngx_mail_core_srv_conf_t *cscf; |
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455 #if (NGX_MAIL_SSL) |
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456 ngx_mail_ssl_conf_t *sslcf; |
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457 |
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458 if (c->ssl == NULL) { |
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459 sslcf = ngx_mail_get_module_srv_conf(s, ngx_mail_ssl_module); |
541 | 460 |
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461 if (sslcf->starttls == NGX_MAIL_STARTTLS_ONLY) { |
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462 return NGX_MAIL_PARSE_INVALID_COMMAND; |
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463 } |
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464 } |
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465 |
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466 #endif |
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467 |
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468 cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); |
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469 |
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470 if (s->args.nelts == 0) { |
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471 s->out = cscf->pop3_auth_capability; |
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472 s->state = 0; |
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473 |
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474 return NGX_OK; |
541 | 475 } |
577 | 476 |
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477 arg = s->args.elts; |
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478 |
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479 if (arg[0].len == 5) { |
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480 |
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481 if (ngx_strncasecmp(arg[0].data, (u_char *) "LOGIN", 5) == 0) { |
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482 |
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483 if (s->args.nelts != 1) { |
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484 return NGX_MAIL_PARSE_INVALID_COMMAND; |
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485 } |
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|
486 |
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487 s->out.len = sizeof(pop3_username) - 1; |
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488 s->out.data = pop3_username; |
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489 s->mail_state = ngx_pop3_auth_login_username; |
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490 |
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491 return NGX_OK; |
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|
492 |
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493 } else if (ngx_strncasecmp(arg[0].data, (u_char *) "PLAIN", 5) == 0) { |
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494 |
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495 if (s->args.nelts == 1) { |
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496 |
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497 s->out.len = sizeof(pop3_next) - 1; |
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498 s->out.data = pop3_next; |
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499 s->mail_state = ngx_pop3_auth_plain; |
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500 |
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501 return NGX_OK; |
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|
502 } |
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|
503 |
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504 if (s->args.nelts == 2) { |
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505 |
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506 /* |
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507 * workaround for Eudora for Mac: it sends |
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508 * AUTH PLAIN [base64 encoded] |
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509 */ |
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510 |
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511 return ngx_mail_auth_plain(s, c, 1); |
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512 } |
541 | 513 |
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514 return NGX_MAIL_PARSE_INVALID_COMMAND; |
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515 } |
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516 |
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517 } else if (arg[0].len == 8 |
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518 && ngx_strncasecmp(arg[0].data, (u_char *) "CRAM-MD5", 8) == 0) |
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519 { |
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520 if (s->args.nelts != 1) { |
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521 return NGX_MAIL_PARSE_INVALID_COMMAND; |
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522 } |
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523 |
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524 if (!(cscf->pop3_auth_methods & NGX_MAIL_AUTH_CRAM_MD5_ENABLED)) { |
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525 return NGX_MAIL_PARSE_INVALID_COMMAND; |
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526 } |
541 | 527 |
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528 p = ngx_palloc(c->pool, |
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529 sizeof("+ " CRLF) - 1 |
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530 + ngx_base64_encoded_length(s->salt.len)); |
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531 if (p == NULL) { |
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532 return NGX_ERROR; |
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533 } |
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534 |
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535 p[0] = '+'; p[1]= ' '; |
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536 salt.data = &p[2]; |
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537 s->salt.len -= 2; |
541 | 538 |
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539 ngx_encode_base64(&salt, &s->salt); |
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540 |
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541 s->salt.len += 2; |
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542 n = 2 + salt.len; |
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543 p[n++] = CR; p[n++] = LF; |
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544 |
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545 s->out.len = n; |
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546 s->out.data = p; |
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547 s->mail_state = ngx_pop3_auth_cram_md5; |
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548 |
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549 return NGX_OK; |
541 | 550 } |
551 | |
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552 return NGX_MAIL_PARSE_INVALID_COMMAND; |
541 | 553 } |