Mercurial > hg > nginx-quic
annotate src/mail/ngx_mail_imap_handler.c @ 4812:785ae4de268b
Corrected the directive name in the ngx_mail_auth_http_module error message.
author | Ruslan Ermilov <ru@nginx.com> |
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date | Wed, 15 Aug 2012 11:17:55 +0000 |
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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6 |
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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 | |
423
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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 } |