Mercurial > hg > nginx
annotate src/mail/ngx_mail_imap_handler.c @ 5267:13c006f0c40e
Events: honor NGX_USE_GREEDY_EVENT when kqueue support is enabled.
Currently this flag is needed for epoll and rtsig, and though these methods
usually present on different platforms than kqueue, nginx can be compiled to
support all of them.
author | Valentin Bartenev <vbart@nginx.com> |
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date | Sat, 13 Jul 2013 03:24:30 +0400 |
parents | d620f497c50f |
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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7 |
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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_imap_module.h> |
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13 |
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14 |
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15 static ngx_int_t ngx_mail_imap_login(ngx_mail_session_t *s, |
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16 ngx_connection_t *c); |
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17 static ngx_int_t ngx_mail_imap_authenticate(ngx_mail_session_t *s, |
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18 ngx_connection_t *c); |
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19 static ngx_int_t ngx_mail_imap_capability(ngx_mail_session_t *s, |
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20 ngx_connection_t *c); |
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21 static ngx_int_t ngx_mail_imap_starttls(ngx_mail_session_t *s, |
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22 ngx_connection_t *c); |
539 | 23 |
413
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24 |
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25 static u_char imap_greeting[] = "* OK IMAP4 ready" CRLF; |
543 | 26 static u_char imap_star[] = "* "; |
529 | 27 static u_char imap_ok[] = "OK completed" CRLF; |
527 | 28 static u_char imap_next[] = "+ OK" CRLF; |
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29 static u_char imap_plain_next[] = "+ " CRLF; |
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30 static u_char imap_username[] = "+ VXNlcm5hbWU6" CRLF; |
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31 static u_char imap_password[] = "+ UGFzc3dvcmQ6" CRLF; |
527 | 32 static u_char imap_bye[] = "* BYE" CRLF; |
33 static u_char imap_invalid_command[] = "BAD invalid command" CRLF; | |
34 | |
521 | 35 |
36 void | |
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37 ngx_mail_imap_init_session(ngx_mail_session_t *s, ngx_connection_t *c) |
413
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38 { |
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39 ngx_mail_core_srv_conf_t *cscf; |
641 | 40 |
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41 cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); |
541 | 42 |
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43 ngx_str_set(&s->out, imap_greeting); |
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44 |
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45 c->read->handler = ngx_mail_imap_init_protocol; |
583 | 46 |
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47 ngx_add_timer(c->read, cscf->timeout); |
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48 |
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49 if (ngx_handle_read_event(c->read, 0) != NGX_OK) { |
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50 ngx_mail_close_connection(c); |
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51 } |
539 | 52 |
1136 | 53 ngx_mail_send(c->write); |
539 | 54 } |
55 | |
56 | |
57 void | |
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58 ngx_mail_imap_init_protocol(ngx_event_t *rev) |
539 | 59 { |
521 | 60 ngx_connection_t *c; |
1136 | 61 ngx_mail_session_t *s; |
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62 ngx_mail_imap_srv_conf_t *iscf; |
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63 |
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64 c = rev->data; |
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65 |
541 | 66 c->log->action = "in auth state"; |
67 | |
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68 if (rev->timedout) { |
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69 ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, "client timed out"); |
577 | 70 c->timedout = 1; |
1136 | 71 ngx_mail_close_connection(c); |
423
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72 return; |
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73 } |
420
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74 |
539 | 75 s = c->data; |
521 | 76 |
419
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77 if (s->buffer == NULL) { |
583 | 78 if (ngx_array_init(&s->args, c->pool, 2, sizeof(ngx_str_t)) |
79 == NGX_ERROR) | |
80 { | |
1136 | 81 ngx_mail_session_internal_server_error(s); |
583 | 82 return; |
83 } | |
84 | |
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85 iscf = ngx_mail_get_module_srv_conf(s, ngx_mail_imap_module); |
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86 |
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87 s->buffer = ngx_create_temp_buf(c->pool, iscf->client_buffer_size); |
583 | 88 if (s->buffer == NULL) { |
1136 | 89 ngx_mail_session_internal_server_error(s); |
583 | 90 return; |
91 } | |
419
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92 } |
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93 |
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94 s->mail_state = ngx_imap_start; |
1477 | 95 c->read->handler = ngx_mail_imap_auth_state; |
1136 | 96 |
1477 | 97 ngx_mail_imap_auth_state(rev); |
1136 | 98 } |
99 | |
100 | |
101 void | |
1477 | 102 ngx_mail_imap_auth_state(ngx_event_t *rev) |
1136 | 103 { |
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104 u_char *p, *dst, *src, *end; |
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105 ngx_str_t *arg; |
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106 ngx_int_t rc; |
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107 ngx_uint_t tag, i; |
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108 ngx_connection_t *c; |
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109 ngx_mail_session_t *s; |
1136 | 110 |
111 c = rev->data; | |
112 s = c->data; | |
113 | |
114 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, c->log, 0, "imap auth state"); | |
115 | |
116 if (rev->timedout) { | |
117 ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, "client timed out"); | |
118 c->timedout = 1; | |
119 ngx_mail_close_connection(c); | |
120 return; | |
121 } | |
122 | |
123 if (s->out.len) { | |
124 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, c->log, 0, "imap send handler busy"); | |
125 s->blocked = 1; | |
126 return; | |
127 } | |
128 | |
129 s->blocked = 0; | |
130 | |
1482 | 131 rc = ngx_mail_read_command(s, c); |
527 | 132 |
133 if (rc == NGX_AGAIN || rc == NGX_ERROR) { | |
134 return; | |
135 } | |
136 | |
137 tag = 1; | |
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138 s->text.len = 0; |
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139 ngx_str_set(&s->out, imap_ok); |
527 | 140 |
141 if (rc == NGX_OK) { | |
142 | |
1136 | 143 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, "imap auth command: %i", |
527 | 144 s->command); |
145 | |
543 | 146 if (s->backslash) { |
147 | |
148 arg = s->args.elts; | |
149 | |
150 for (i = 0; i < s->args.nelts; i++) { | |
151 dst = arg[i].data; | |
152 end = dst + arg[i].len; | |
153 | |
154 for (src = dst; src < end; dst++) { | |
155 *dst = *src; | |
156 if (*src++ == '\\') { | |
157 *dst = *src++; | |
158 } | |
159 } | |
160 | |
161 arg[i].len = dst - arg[i].data; | |
162 } | |
163 | |
164 s->backslash = 0; | |
165 } | |
166 | |
1323 | 167 switch (s->mail_state) { |
168 | |
169 case ngx_imap_start: | |
170 | |
171 switch (s->command) { | |
172 | |
173 case NGX_IMAP_LOGIN: | |
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174 rc = ngx_mail_imap_login(s, c); |
1323 | 175 break; |
176 | |
177 case NGX_IMAP_AUTHENTICATE: | |
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178 rc = ngx_mail_imap_authenticate(s, c); |
1479 | 179 tag = (rc != NGX_OK); |
1323 | 180 break; |
181 | |
182 case NGX_IMAP_CAPABILITY: | |
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183 rc = ngx_mail_imap_capability(s, c); |
1323 | 184 break; |
185 | |
186 case NGX_IMAP_LOGOUT: | |
187 s->quit = 1; | |
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188 ngx_str_set(&s->text, imap_bye); |
1323 | 189 break; |
190 | |
191 case NGX_IMAP_NOOP: | |
192 break; | |
193 | |
194 case NGX_IMAP_STARTTLS: | |
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195 rc = ngx_mail_imap_starttls(s, c); |
1323 | 196 break; |
197 | |
198 default: | |
199 rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
200 break; | |
201 } | |
202 | |
203 break; | |
204 | |
205 case ngx_imap_auth_login_username: | |
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206 rc = ngx_mail_auth_login_username(s, c, 0); |
1323 | 207 |
208 tag = 0; | |
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209 ngx_str_set(&s->out, imap_password); |
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210 s->mail_state = ngx_imap_auth_login_password; |
1323 | 211 |
212 break; | |
213 | |
214 case ngx_imap_auth_login_password: | |
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215 rc = ngx_mail_auth_login_password(s, c); |
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216 break; |
1323 | 217 |
218 case ngx_imap_auth_plain: | |
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219 rc = ngx_mail_auth_plain(s, c, 0); |
527 | 220 break; |
221 | |
1323 | 222 case ngx_imap_auth_cram_md5: |
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223 rc = ngx_mail_auth_cram_md5(s, c); |
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224 break; |
527 | 225 } |
226 | |
227 } else if (rc == NGX_IMAP_NEXT) { | |
228 tag = 0; | |
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229 ngx_str_set(&s->out, imap_next); |
527 | 230 } |
231 | |
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232 switch (rc) { |
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233 |
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234 case NGX_DONE: |
1482 | 235 ngx_mail_auth(s, c); |
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236 return; |
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237 |
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238 case NGX_ERROR: |
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239 ngx_mail_session_internal_server_error(s); |
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240 return; |
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241 |
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242 case NGX_MAIL_PARSE_INVALID_COMMAND: |
1323 | 243 s->state = 0; |
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244 ngx_str_set(&s->out, imap_invalid_command); |
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245 s->mail_state = ngx_imap_start; |
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246 break; |
527 | 247 } |
248 | |
249 if (tag) { | |
543 | 250 if (s->tag.len == 0) { |
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251 ngx_str_set(&s->tag, imap_star); |
543 | 252 } |
253 | |
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254 if (s->tagged_line.len < s->tag.len + s->text.len + s->out.len) { |
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255 s->tagged_line.len = s->tag.len + s->text.len + s->out.len; |
2049 | 256 s->tagged_line.data = ngx_pnalloc(c->pool, s->tagged_line.len); |
539 | 257 if (s->tagged_line.data == NULL) { |
1136 | 258 ngx_mail_close_connection(c); |
527 | 259 return; |
260 } | |
261 } | |
262 | |
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263 p = s->tagged_line.data; |
539 | 264 |
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265 if (s->text.len) { |
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266 p = ngx_cpymem(p, s->text.data, s->text.len); |
527 | 267 } |
268 | |
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269 p = ngx_cpymem(p, s->tag.data, s->tag.len); |
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270 ngx_memcpy(p, s->out.data, s->out.len); |
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271 |
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272 s->out.len = s->text.len + s->tag.len + s->out.len; |
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273 s->out.data = s->tagged_line.data; |
527 | 274 } |
275 | |
539 | 276 if (rc != NGX_IMAP_NEXT) { |
277 s->args.nelts = 0; | |
1323 | 278 |
279 if (s->state) { | |
280 /* preserve tag */ | |
281 s->arg_start = s->buffer->start + s->tag.len; | |
282 s->buffer->pos = s->arg_start; | |
283 s->buffer->last = s->arg_start; | |
284 | |
285 } else { | |
286 s->buffer->pos = s->buffer->start; | |
287 s->buffer->last = s->buffer->start; | |
288 s->tag.len = 0; | |
289 } | |
527 | 290 } |
291 | |
1136 | 292 ngx_mail_send(c->write); |
521 | 293 } |
294 | |
295 | |
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296 static ngx_int_t |
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297 ngx_mail_imap_login(ngx_mail_session_t *s, ngx_connection_t *c) |
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298 { |
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299 ngx_str_t *arg; |
1479 | 300 |
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301 #if (NGX_MAIL_SSL) |
1479 | 302 if (ngx_mail_starttls_only(s, c)) { |
303 return NGX_MAIL_PARSE_INVALID_COMMAND; | |
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304 } |
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305 #endif |
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306 |
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307 arg = s->args.elts; |
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308 |
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309 if (s->args.nelts != 2 || arg[0].len == 0) { |
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310 return NGX_MAIL_PARSE_INVALID_COMMAND; |
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311 } |
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312 |
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313 s->login.len = arg[0].len; |
2049 | 314 s->login.data = ngx_pnalloc(c->pool, s->login.len); |
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315 if (s->login.data == NULL) { |
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316 return NGX_ERROR; |
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317 } |
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318 |
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319 ngx_memcpy(s->login.data, arg[0].data, s->login.len); |
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320 |
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321 s->passwd.len = arg[1].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 } |
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326 |
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327 ngx_memcpy(s->passwd.data, arg[1].data, s->passwd.len); |
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328 |
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329 #if (NGX_DEBUG_MAIL_PASSWD) |
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330 ngx_log_debug2(NGX_LOG_DEBUG_MAIL, c->log, 0, |
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331 "imap login:\"%V\" passwd:\"%V\"", |
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332 &s->login, &s->passwd); |
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333 #else |
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334 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, |
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335 "imap login:\"%V\"", &s->login); |
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336 #endif |
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337 |
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338 return NGX_DONE; |
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339 } |
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340 |
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341 |
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342 static ngx_int_t |
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343 ngx_mail_imap_authenticate(ngx_mail_session_t *s, ngx_connection_t *c) |
420
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344 { |
1479 | 345 ngx_int_t rc; |
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346 ngx_mail_core_srv_conf_t *cscf; |
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347 ngx_mail_imap_srv_conf_t *iscf; |
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348 |
1479 | 349 #if (NGX_MAIL_SSL) |
350 if (ngx_mail_starttls_only(s, c)) { | |
351 return NGX_MAIL_PARSE_INVALID_COMMAND; | |
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352 } |
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353 #endif |
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354 |
1479 | 355 rc = ngx_mail_auth_parse(s, c); |
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356 |
1479 | 357 switch (rc) { |
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358 |
1479 | 359 case NGX_MAIL_AUTH_LOGIN: |
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360 |
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361 ngx_str_set(&s->out, imap_username); |
1479 | 362 s->mail_state = ngx_imap_auth_login_username; |
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363 |
1479 | 364 return NGX_OK; |
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365 |
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366 case NGX_MAIL_AUTH_LOGIN_USERNAME: |
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367 |
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368 ngx_str_set(&s->out, imap_password); |
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369 s->mail_state = ngx_imap_auth_login_password; |
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370 |
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371 return ngx_mail_auth_login_username(s, c, 1); |
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372 |
1479 | 373 case NGX_MAIL_AUTH_PLAIN: |
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374 |
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375 ngx_str_set(&s->out, imap_plain_next); |
1479 | 376 s->mail_state = ngx_imap_auth_plain; |
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377 |
1479 | 378 return NGX_OK; |
379 | |
380 case NGX_MAIL_AUTH_CRAM_MD5: | |
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381 |
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382 iscf = ngx_mail_get_module_srv_conf(s, ngx_mail_imap_module); |
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383 |
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384 if (!(iscf->auth_methods & NGX_MAIL_AUTH_CRAM_MD5_ENABLED)) { |
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385 return NGX_MAIL_PARSE_INVALID_COMMAND; |
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386 } |
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387 |
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388 if (s->salt.data == NULL) { |
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389 cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); |
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390 |
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391 if (ngx_mail_salt(s, c, cscf) != NGX_OK) { |
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392 return NGX_ERROR; |
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393 } |
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394 } |
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395 |
1479 | 396 if (ngx_mail_auth_cram_md5_salt(s, c, "+ ", 2) == NGX_OK) { |
397 s->mail_state = ngx_imap_auth_cram_md5; | |
398 return NGX_OK; | |
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399 } |
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400 |
1479 | 401 return NGX_ERROR; |
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402 } |
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403 |
1479 | 404 return rc; |
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405 } |
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406 |
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407 |
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408 static ngx_int_t |
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409 ngx_mail_imap_capability(ngx_mail_session_t *s, ngx_connection_t *c) |
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410 { |
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411 ngx_mail_imap_srv_conf_t *iscf; |
420
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412 |
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413 iscf = ngx_mail_get_module_srv_conf(s, ngx_mail_imap_module); |
809 | 414 |
1322 | 415 #if (NGX_MAIL_SSL) |
416 | |
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417 if (c->ssl == NULL) { |
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418 ngx_mail_ssl_conf_t *sslcf; |
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419 |
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420 sslcf = ngx_mail_get_module_srv_conf(s, ngx_mail_ssl_module); |
809 | 421 |
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422 if (sslcf->starttls == NGX_MAIL_STARTTLS_ON) { |
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423 s->text = iscf->starttls_capability; |
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424 return NGX_OK; |
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425 } |
1136 | 426 |
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427 if (sslcf->starttls == NGX_MAIL_STARTTLS_ONLY) { |
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428 s->text = iscf->starttls_only_capability; |
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429 return NGX_OK; |
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430 } |
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431 } |
1322 | 432 #endif |
433 | |
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434 s->text = iscf->capability; |
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435 |
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436 return NGX_OK; |
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437 } |
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438 |
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439 |
521 | 440 static ngx_int_t |
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441 ngx_mail_imap_starttls(ngx_mail_session_t *s, ngx_connection_t *c) |
420
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442 { |
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443 #if (NGX_MAIL_SSL) |
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444 ngx_mail_ssl_conf_t *sslcf; |
1136 | 445 |
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446 if (c->ssl == NULL) { |
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447 sslcf = ngx_mail_get_module_srv_conf(s, ngx_mail_ssl_module); |
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448 if (sslcf->starttls) { |
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449 c->read->handler = ngx_mail_starttls_handler; |
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450 return NGX_OK; |
539 | 451 } |
452 } | |
453 | |
454 #endif | |
455 | |
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456 return NGX_MAIL_PARSE_INVALID_COMMAND; |
417
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457 } |