Mercurial > hg > nginx
annotate src/mail/ngx_mail_imap_handler.c @ 1482:4606dce4f416
optimizations
author | Igor Sysoev <igor@sysoev.ru> |
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date | Fri, 14 Sep 2007 14:04:24 +0000 |
parents | a231e37a19ab |
children | b3488fc2675a |
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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6 |
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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_imap_login(ngx_mail_session_t *s, |
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14 ngx_connection_t *c); |
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15 static ngx_int_t ngx_mail_imap_authenticate(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_capability(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_starttls(ngx_mail_session_t *s, |
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20 ngx_connection_t *c); |
539 | 21 |
413
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22 |
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23 static u_char imap_greeting[] = "* OK IMAP4 ready" CRLF; |
543 | 24 static u_char imap_star[] = "* "; |
529 | 25 static u_char imap_ok[] = "OK completed" CRLF; |
527 | 26 static u_char imap_next[] = "+ OK" CRLF; |
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27 static u_char imap_plain_next[] = "+ " CRLF; |
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28 static u_char imap_username[] = "+ VXNlcm5hbWU6" CRLF; |
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29 static u_char imap_password[] = "+ UGFzc3dvcmQ6" CRLF; |
527 | 30 static u_char imap_bye[] = "* BYE" CRLF; |
31 static u_char imap_invalid_command[] = "BAD invalid command" CRLF; | |
32 | |
521 | 33 |
34 void | |
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35 ngx_mail_imap_init_session(ngx_mail_session_t *s, ngx_connection_t *c) |
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36 { |
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37 ngx_mail_core_srv_conf_t *cscf; |
641 | 38 |
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39 cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); |
541 | 40 |
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41 if (cscf->imap_auth_methods & NGX_MAIL_AUTH_CRAM_MD5_ENABLED) { |
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42 if (ngx_mail_salt(s, c, cscf) != NGX_OK) { |
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43 ngx_mail_session_internal_server_error(s); |
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44 return; |
641 | 45 } |
46 } | |
47 | |
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48 s->out.len = sizeof(imap_greeting) - 1; |
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49 s->out.data = imap_greeting; |
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50 |
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51 c->read->handler = ngx_mail_imap_init_protocol; |
583 | 52 |
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53 ngx_add_timer(c->read, cscf->timeout); |
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54 |
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55 if (ngx_handle_read_event(c->read, 0) == NGX_ERROR) { |
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56 ngx_mail_close_connection(c); |
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57 } |
539 | 58 |
1136 | 59 ngx_mail_send(c->write); |
539 | 60 } |
61 | |
62 | |
63 void | |
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64 ngx_mail_imap_init_protocol(ngx_event_t *rev) |
539 | 65 { |
521 | 66 ngx_connection_t *c; |
1136 | 67 ngx_mail_session_t *s; |
68 ngx_mail_core_srv_conf_t *cscf; | |
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69 |
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70 c = rev->data; |
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71 |
541 | 72 c->log->action = "in auth state"; |
73 | |
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74 if (rev->timedout) { |
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75 ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, "client timed out"); |
577 | 76 c->timedout = 1; |
1136 | 77 ngx_mail_close_connection(c); |
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78 return; |
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79 } |
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80 |
539 | 81 s = c->data; |
521 | 82 |
419
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83 if (s->buffer == NULL) { |
583 | 84 if (ngx_array_init(&s->args, c->pool, 2, sizeof(ngx_str_t)) |
85 == NGX_ERROR) | |
86 { | |
1136 | 87 ngx_mail_session_internal_server_error(s); |
583 | 88 return; |
89 } | |
90 | |
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91 cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); |
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92 |
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93 s->buffer = ngx_create_temp_buf(c->pool, cscf->imap_client_buffer_size); |
583 | 94 if (s->buffer == NULL) { |
1136 | 95 ngx_mail_session_internal_server_error(s); |
583 | 96 return; |
97 } | |
419
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98 } |
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99 |
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100 s->mail_state = ngx_imap_start; |
1477 | 101 c->read->handler = ngx_mail_imap_auth_state; |
1136 | 102 |
1477 | 103 ngx_mail_imap_auth_state(rev); |
1136 | 104 } |
105 | |
106 | |
107 void | |
1477 | 108 ngx_mail_imap_auth_state(ngx_event_t *rev) |
1136 | 109 { |
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110 u_char *p, *dst, *src, *end; |
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111 ngx_str_t *arg; |
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112 ngx_int_t rc; |
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113 ngx_uint_t tag, i; |
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114 ngx_connection_t *c; |
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115 ngx_mail_session_t *s; |
1136 | 116 |
117 c = rev->data; | |
118 s = c->data; | |
119 | |
120 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, c->log, 0, "imap auth state"); | |
121 | |
122 if (rev->timedout) { | |
123 ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, "client timed out"); | |
124 c->timedout = 1; | |
125 ngx_mail_close_connection(c); | |
126 return; | |
127 } | |
128 | |
129 if (s->out.len) { | |
130 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, c->log, 0, "imap send handler busy"); | |
131 s->blocked = 1; | |
132 return; | |
133 } | |
134 | |
135 s->blocked = 0; | |
136 | |
1482 | 137 rc = ngx_mail_read_command(s, c); |
527 | 138 |
139 if (rc == NGX_AGAIN || rc == NGX_ERROR) { | |
140 return; | |
141 } | |
142 | |
143 tag = 1; | |
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144 s->text.len = 0; |
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145 s->out.len = sizeof(imap_ok) - 1; |
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146 s->out.data = imap_ok; |
527 | 147 |
148 if (rc == NGX_OK) { | |
149 | |
1136 | 150 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, "imap auth command: %i", |
527 | 151 s->command); |
152 | |
543 | 153 if (s->backslash) { |
154 | |
155 arg = s->args.elts; | |
156 | |
157 for (i = 0; i < s->args.nelts; i++) { | |
158 dst = arg[i].data; | |
159 end = dst + arg[i].len; | |
160 | |
161 for (src = dst; src < end; dst++) { | |
162 *dst = *src; | |
163 if (*src++ == '\\') { | |
164 *dst = *src++; | |
165 } | |
166 } | |
167 | |
168 arg[i].len = dst - arg[i].data; | |
169 } | |
170 | |
171 s->backslash = 0; | |
172 } | |
173 | |
1323 | 174 switch (s->mail_state) { |
175 | |
176 case ngx_imap_start: | |
177 | |
178 switch (s->command) { | |
179 | |
180 case NGX_IMAP_LOGIN: | |
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181 rc = ngx_mail_imap_login(s, c); |
1323 | 182 break; |
183 | |
184 case NGX_IMAP_AUTHENTICATE: | |
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185 rc = ngx_mail_imap_authenticate(s, c); |
1479 | 186 tag = (rc != NGX_OK); |
1323 | 187 break; |
188 | |
189 case NGX_IMAP_CAPABILITY: | |
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190 rc = ngx_mail_imap_capability(s, c); |
1323 | 191 break; |
192 | |
193 case NGX_IMAP_LOGOUT: | |
194 s->quit = 1; | |
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195 s->text.len = sizeof(imap_bye) - 1; |
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196 s->text.data = imap_bye; |
1323 | 197 break; |
198 | |
199 case NGX_IMAP_NOOP: | |
200 break; | |
201 | |
202 case NGX_IMAP_STARTTLS: | |
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203 rc = ngx_mail_imap_starttls(s, c); |
1323 | 204 break; |
205 | |
206 default: | |
207 rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
208 break; | |
209 } | |
210 | |
211 break; | |
212 | |
213 case ngx_imap_auth_login_username: | |
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214 rc = ngx_mail_auth_login_username(s, c); |
1323 | 215 |
216 tag = 0; | |
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217 s->out.len = sizeof(imap_password) - 1; |
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218 s->out.data = imap_password; |
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219 s->mail_state = ngx_imap_auth_login_password; |
1323 | 220 |
221 break; | |
222 | |
223 case ngx_imap_auth_login_password: | |
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224 rc = ngx_mail_auth_login_password(s, c); |
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225 break; |
1323 | 226 |
227 case ngx_imap_auth_plain: | |
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228 rc = ngx_mail_auth_plain(s, c, 0); |
527 | 229 break; |
230 | |
1323 | 231 case ngx_imap_auth_cram_md5: |
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232 rc = ngx_mail_auth_cram_md5(s, c); |
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233 break; |
527 | 234 } |
235 | |
236 } else if (rc == NGX_IMAP_NEXT) { | |
237 tag = 0; | |
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238 s->out.len = sizeof(imap_next) - 1; |
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239 s->out.data = imap_next; |
527 | 240 } |
241 | |
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242 switch (rc) { |
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243 |
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244 case NGX_DONE: |
1482 | 245 ngx_mail_auth(s, c); |
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246 return; |
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247 |
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248 case NGX_ERROR: |
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249 ngx_mail_session_internal_server_error(s); |
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250 return; |
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251 |
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252 case NGX_MAIL_PARSE_INVALID_COMMAND: |
1323 | 253 s->state = 0; |
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254 s->out.len = sizeof(imap_invalid_command) - 1; |
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255 s->out.data = imap_invalid_command; |
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256 s->mail_state = ngx_imap_start; |
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257 break; |
527 | 258 } |
259 | |
260 if (tag) { | |
543 | 261 if (s->tag.len == 0) { |
262 s->tag.len = sizeof(imap_star) - 1; | |
263 s->tag.data = (u_char *) imap_star; | |
264 } | |
265 | |
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266 if (s->tagged_line.len < s->tag.len + s->text.len + s->out.len) { |
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267 s->tagged_line.len = s->tag.len + s->text.len + s->out.len; |
539 | 268 s->tagged_line.data = ngx_palloc(c->pool, s->tagged_line.len); |
269 if (s->tagged_line.data == NULL) { | |
1136 | 270 ngx_mail_close_connection(c); |
527 | 271 return; |
272 } | |
273 } | |
274 | |
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275 p = s->tagged_line.data; |
539 | 276 |
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277 if (s->text.len) { |
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278 p = ngx_cpymem(p, s->text.data, s->text.len); |
527 | 279 } |
280 | |
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281 p = ngx_cpymem(p, s->tag.data, s->tag.len); |
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282 ngx_memcpy(p, s->out.data, s->out.len); |
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283 |
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284 s->out.len = s->text.len + s->tag.len + s->out.len; |
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285 s->out.data = s->tagged_line.data; |
527 | 286 } |
287 | |
539 | 288 if (rc != NGX_IMAP_NEXT) { |
289 s->args.nelts = 0; | |
1323 | 290 |
291 if (s->state) { | |
292 /* preserve tag */ | |
293 s->arg_start = s->buffer->start + s->tag.len; | |
294 s->buffer->pos = s->arg_start; | |
295 s->buffer->last = s->arg_start; | |
296 | |
297 } else { | |
298 s->buffer->pos = s->buffer->start; | |
299 s->buffer->last = s->buffer->start; | |
300 s->tag.len = 0; | |
301 } | |
527 | 302 } |
303 | |
1136 | 304 ngx_mail_send(c->write); |
521 | 305 } |
306 | |
307 | |
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308 static ngx_int_t |
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309 ngx_mail_imap_login(ngx_mail_session_t *s, ngx_connection_t *c) |
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310 { |
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311 ngx_str_t *arg; |
1479 | 312 |
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313 #if (NGX_MAIL_SSL) |
1479 | 314 if (ngx_mail_starttls_only(s, c)) { |
315 return NGX_MAIL_PARSE_INVALID_COMMAND; | |
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316 } |
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317 #endif |
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318 |
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319 arg = s->args.elts; |
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320 |
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321 if (s->args.nelts != 2 || arg[0].len == 0) { |
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322 return NGX_MAIL_PARSE_INVALID_COMMAND; |
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323 } |
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324 |
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325 s->login.len = arg[0].len; |
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326 s->login.data = ngx_palloc(c->pool, s->login.len); |
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327 if (s->login.data == NULL) { |
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328 return NGX_ERROR; |
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329 } |
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330 |
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331 ngx_memcpy(s->login.data, arg[0].data, s->login.len); |
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332 |
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333 s->passwd.len = arg[1].len; |
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334 s->passwd.data = ngx_palloc(c->pool, s->passwd.len); |
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335 if (s->passwd.data == NULL) { |
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336 return NGX_ERROR; |
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337 } |
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338 |
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339 ngx_memcpy(s->passwd.data, arg[1].data, s->passwd.len); |
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340 |
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341 #if (NGX_DEBUG_MAIL_PASSWD) |
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342 ngx_log_debug2(NGX_LOG_DEBUG_MAIL, c->log, 0, |
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343 "imap login:\"%V\" passwd:\"%V\"", |
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344 &s->login, &s->passwd); |
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345 #else |
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346 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, |
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347 "imap login:\"%V\"", &s->login); |
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348 #endif |
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349 |
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350 return NGX_DONE; |
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351 } |
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352 |
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353 |
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354 static ngx_int_t |
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355 ngx_mail_imap_authenticate(ngx_mail_session_t *s, ngx_connection_t *c) |
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356 { |
1479 | 357 ngx_int_t rc; |
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358 ngx_mail_core_srv_conf_t *cscf; |
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359 |
1479 | 360 #if (NGX_MAIL_SSL) |
361 if (ngx_mail_starttls_only(s, c)) { | |
362 return NGX_MAIL_PARSE_INVALID_COMMAND; | |
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363 } |
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364 #endif |
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365 |
1479 | 366 rc = ngx_mail_auth_parse(s, c); |
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367 |
1479 | 368 switch (rc) { |
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369 |
1479 | 370 case NGX_MAIL_AUTH_LOGIN: |
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371 |
1479 | 372 s->out.len = sizeof(imap_username) - 1; |
373 s->out.data = imap_username; | |
374 s->mail_state = ngx_imap_auth_login_username; | |
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375 |
1479 | 376 return NGX_OK; |
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377 |
1479 | 378 case NGX_MAIL_AUTH_PLAIN: |
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379 |
1479 | 380 s->out.len = sizeof(imap_plain_next) - 1; |
381 s->out.data = imap_plain_next; | |
382 s->mail_state = ngx_imap_auth_plain; | |
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383 |
1479 | 384 return NGX_OK; |
385 | |
386 case NGX_MAIL_AUTH_CRAM_MD5: | |
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387 |
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388 cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); |
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389 |
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390 if (!(cscf->imap_auth_methods & NGX_MAIL_AUTH_CRAM_MD5_ENABLED)) { |
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391 return NGX_MAIL_PARSE_INVALID_COMMAND; |
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392 } |
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393 |
1479 | 394 if (ngx_mail_auth_cram_md5_salt(s, c, "+ ", 2) == NGX_OK) { |
395 s->mail_state = ngx_imap_auth_cram_md5; | |
396 return NGX_OK; | |
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397 } |
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398 |
1479 | 399 return NGX_ERROR; |
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400 } |
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401 |
1479 | 402 return rc; |
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403 } |
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404 |
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405 |
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406 static ngx_int_t |
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407 ngx_mail_imap_capability(ngx_mail_session_t *s, ngx_connection_t *c) |
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408 { |
1136 | 409 ngx_mail_core_srv_conf_t *cscf; |
1322 | 410 #if (NGX_MAIL_SSL) |
411 ngx_mail_ssl_conf_t *sslcf; | |
412 #endif | |
420
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413 |
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414 cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); |
809 | 415 |
1322 | 416 #if (NGX_MAIL_SSL) |
417 | |
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418 if (c->ssl == NULL) { |
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419 sslcf = ngx_mail_get_module_srv_conf(s, ngx_mail_ssl_module); |
809 | 420 |
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421 if (sslcf->starttls == NGX_MAIL_STARTTLS_ON) { |
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422 s->text = cscf->imap_starttls_capability; |
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423 return NGX_OK; |
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424 } |
1136 | 425 |
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426 if (sslcf->starttls == NGX_MAIL_STARTTLS_ONLY) { |
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427 s->text = cscf->imap_starttls_only_capability; |
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428 return NGX_OK; |
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429 } |
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430 } |
1322 | 431 #endif |
432 | |
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433 s->text = cscf->imap_capability; |
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434 |
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435 return NGX_OK; |
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436 } |
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437 |
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438 |
521 | 439 static ngx_int_t |
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440 ngx_mail_imap_starttls(ngx_mail_session_t *s, ngx_connection_t *c) |
420
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441 { |
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442 #if (NGX_MAIL_SSL) |
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443 ngx_mail_ssl_conf_t *sslcf; |
1136 | 444 |
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445 if (c->ssl == NULL) { |
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446 sslcf = ngx_mail_get_module_srv_conf(s, ngx_mail_ssl_module); |
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447 if (sslcf->starttls) { |
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448 c->read->handler = ngx_mail_starttls_handler; |
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449 return NGX_OK; |
539 | 450 } |
451 } | |
452 | |
453 #endif | |
454 | |
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455 return NGX_MAIL_PARSE_INVALID_COMMAND; |
417
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456 } |