Mercurial > hg > nginx
annotate src/mail/ngx_mail_imap_handler.c @ 2306:4c6a0361d74a
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author | Igor Sysoev <igor@sysoev.ru> |
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date | Wed, 12 Nov 2008 10:48:27 +0000 |
parents | 2a92804f4109 |
children | 722b5aff05ae |
rev | line source |
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1 |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
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4 */ |
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7 #include <ngx_config.h> |
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8 #include <ngx_core.h> |
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9 #include <ngx_event.h> |
1136 | 10 #include <ngx_mail.h> |
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11 #include <ngx_mail_imap_module.h> |
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12 |
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13 |
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14 static ngx_int_t ngx_mail_imap_login(ngx_mail_session_t *s, |
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15 ngx_connection_t *c); |
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16 static ngx_int_t ngx_mail_imap_authenticate(ngx_mail_session_t *s, |
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17 ngx_connection_t *c); |
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18 static ngx_int_t ngx_mail_imap_capability(ngx_mail_session_t *s, |
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19 ngx_connection_t *c); |
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20 static ngx_int_t ngx_mail_imap_starttls(ngx_mail_session_t *s, |
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21 ngx_connection_t *c); |
539 | 22 |
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23 |
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24 static u_char imap_greeting[] = "* OK IMAP4 ready" CRLF; |
543 | 25 static u_char imap_star[] = "* "; |
529 | 26 static u_char imap_ok[] = "OK completed" CRLF; |
527 | 27 static u_char imap_next[] = "+ OK" CRLF; |
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28 static u_char imap_plain_next[] = "+ " CRLF; |
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29 static u_char imap_username[] = "+ VXNlcm5hbWU6" CRLF; |
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30 static u_char imap_password[] = "+ UGFzc3dvcmQ6" CRLF; |
527 | 31 static u_char imap_bye[] = "* BYE" CRLF; |
32 static u_char imap_invalid_command[] = "BAD invalid command" CRLF; | |
33 | |
521 | 34 |
35 void | |
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36 ngx_mail_imap_init_session(ngx_mail_session_t *s, ngx_connection_t *c) |
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37 { |
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38 ngx_mail_core_srv_conf_t *cscf; |
641 | 39 |
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40 cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); |
541 | 41 |
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42 s->out.len = sizeof(imap_greeting) - 1; |
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43 s->out.data = 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_ERROR) { |
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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); |
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72 return; |
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73 } |
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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 s->out.len = sizeof(imap_ok) - 1; |
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140 s->out.data = imap_ok; |
527 | 141 |
142 if (rc == NGX_OK) { | |
143 | |
1136 | 144 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, "imap auth command: %i", |
527 | 145 s->command); |
146 | |
543 | 147 if (s->backslash) { |
148 | |
149 arg = s->args.elts; | |
150 | |
151 for (i = 0; i < s->args.nelts; i++) { | |
152 dst = arg[i].data; | |
153 end = dst + arg[i].len; | |
154 | |
155 for (src = dst; src < end; dst++) { | |
156 *dst = *src; | |
157 if (*src++ == '\\') { | |
158 *dst = *src++; | |
159 } | |
160 } | |
161 | |
162 arg[i].len = dst - arg[i].data; | |
163 } | |
164 | |
165 s->backslash = 0; | |
166 } | |
167 | |
1323 | 168 switch (s->mail_state) { |
169 | |
170 case ngx_imap_start: | |
171 | |
172 switch (s->command) { | |
173 | |
174 case NGX_IMAP_LOGIN: | |
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175 rc = ngx_mail_imap_login(s, c); |
1323 | 176 break; |
177 | |
178 case NGX_IMAP_AUTHENTICATE: | |
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179 rc = ngx_mail_imap_authenticate(s, c); |
1479 | 180 tag = (rc != NGX_OK); |
1323 | 181 break; |
182 | |
183 case NGX_IMAP_CAPABILITY: | |
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184 rc = ngx_mail_imap_capability(s, c); |
1323 | 185 break; |
186 | |
187 case NGX_IMAP_LOGOUT: | |
188 s->quit = 1; | |
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189 s->text.len = sizeof(imap_bye) - 1; |
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190 s->text.data = imap_bye; |
1323 | 191 break; |
192 | |
193 case NGX_IMAP_NOOP: | |
194 break; | |
195 | |
196 case NGX_IMAP_STARTTLS: | |
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197 rc = ngx_mail_imap_starttls(s, c); |
1323 | 198 break; |
199 | |
200 default: | |
201 rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
202 break; | |
203 } | |
204 | |
205 break; | |
206 | |
207 case ngx_imap_auth_login_username: | |
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208 rc = ngx_mail_auth_login_username(s, c); |
1323 | 209 |
210 tag = 0; | |
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211 s->out.len = sizeof(imap_password) - 1; |
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212 s->out.data = imap_password; |
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213 s->mail_state = ngx_imap_auth_login_password; |
1323 | 214 |
215 break; | |
216 | |
217 case ngx_imap_auth_login_password: | |
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218 rc = ngx_mail_auth_login_password(s, c); |
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219 break; |
1323 | 220 |
221 case ngx_imap_auth_plain: | |
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222 rc = ngx_mail_auth_plain(s, c, 0); |
527 | 223 break; |
224 | |
1323 | 225 case ngx_imap_auth_cram_md5: |
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226 rc = ngx_mail_auth_cram_md5(s, c); |
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227 break; |
527 | 228 } |
229 | |
230 } else if (rc == NGX_IMAP_NEXT) { | |
231 tag = 0; | |
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232 s->out.len = sizeof(imap_next) - 1; |
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233 s->out.data = imap_next; |
527 | 234 } |
235 | |
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236 switch (rc) { |
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237 |
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238 case NGX_DONE: |
1482 | 239 ngx_mail_auth(s, c); |
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240 return; |
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241 |
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242 case NGX_ERROR: |
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243 ngx_mail_session_internal_server_error(s); |
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244 return; |
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245 |
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246 case NGX_MAIL_PARSE_INVALID_COMMAND: |
1323 | 247 s->state = 0; |
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248 s->out.len = sizeof(imap_invalid_command) - 1; |
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249 s->out.data = imap_invalid_command; |
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250 s->mail_state = ngx_imap_start; |
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251 break; |
527 | 252 } |
253 | |
254 if (tag) { | |
543 | 255 if (s->tag.len == 0) { |
256 s->tag.len = sizeof(imap_star) - 1; | |
257 s->tag.data = (u_char *) imap_star; | |
258 } | |
259 | |
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260 if (s->tagged_line.len < s->tag.len + s->text.len + s->out.len) { |
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261 s->tagged_line.len = s->tag.len + s->text.len + s->out.len; |
2049 | 262 s->tagged_line.data = ngx_pnalloc(c->pool, s->tagged_line.len); |
539 | 263 if (s->tagged_line.data == NULL) { |
1136 | 264 ngx_mail_close_connection(c); |
527 | 265 return; |
266 } | |
267 } | |
268 | |
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269 p = s->tagged_line.data; |
539 | 270 |
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271 if (s->text.len) { |
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272 p = ngx_cpymem(p, s->text.data, s->text.len); |
527 | 273 } |
274 | |
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275 p = ngx_cpymem(p, s->tag.data, s->tag.len); |
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276 ngx_memcpy(p, s->out.data, s->out.len); |
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277 |
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278 s->out.len = s->text.len + s->tag.len + s->out.len; |
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279 s->out.data = s->tagged_line.data; |
527 | 280 } |
281 | |
539 | 282 if (rc != NGX_IMAP_NEXT) { |
283 s->args.nelts = 0; | |
1323 | 284 |
285 if (s->state) { | |
286 /* preserve tag */ | |
287 s->arg_start = s->buffer->start + s->tag.len; | |
288 s->buffer->pos = s->arg_start; | |
289 s->buffer->last = s->arg_start; | |
290 | |
291 } else { | |
292 s->buffer->pos = s->buffer->start; | |
293 s->buffer->last = s->buffer->start; | |
294 s->tag.len = 0; | |
295 } | |
527 | 296 } |
297 | |
1136 | 298 ngx_mail_send(c->write); |
521 | 299 } |
300 | |
301 | |
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302 static ngx_int_t |
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303 ngx_mail_imap_login(ngx_mail_session_t *s, ngx_connection_t *c) |
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304 { |
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305 ngx_str_t *arg; |
1479 | 306 |
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307 #if (NGX_MAIL_SSL) |
1479 | 308 if (ngx_mail_starttls_only(s, c)) { |
309 return NGX_MAIL_PARSE_INVALID_COMMAND; | |
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310 } |
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311 #endif |
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312 |
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313 arg = s->args.elts; |
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314 |
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315 if (s->args.nelts != 2 || arg[0].len == 0) { |
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316 return NGX_MAIL_PARSE_INVALID_COMMAND; |
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317 } |
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318 |
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319 s->login.len = arg[0].len; |
2049 | 320 s->login.data = ngx_pnalloc(c->pool, s->login.len); |
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321 if (s->login.data == NULL) { |
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322 return NGX_ERROR; |
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323 } |
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324 |
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325 ngx_memcpy(s->login.data, arg[0].data, s->login.len); |
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326 |
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327 s->passwd.len = arg[1].len; |
2049 | 328 s->passwd.data = ngx_pnalloc(c->pool, s->passwd.len); |
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329 if (s->passwd.data == NULL) { |
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330 return NGX_ERROR; |
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331 } |
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332 |
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333 ngx_memcpy(s->passwd.data, arg[1].data, s->passwd.len); |
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334 |
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335 #if (NGX_DEBUG_MAIL_PASSWD) |
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336 ngx_log_debug2(NGX_LOG_DEBUG_MAIL, c->log, 0, |
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337 "imap login:\"%V\" passwd:\"%V\"", |
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338 &s->login, &s->passwd); |
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339 #else |
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340 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, |
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341 "imap login:\"%V\"", &s->login); |
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342 #endif |
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343 |
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344 return NGX_DONE; |
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345 } |
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346 |
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347 |
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348 static ngx_int_t |
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349 ngx_mail_imap_authenticate(ngx_mail_session_t *s, ngx_connection_t *c) |
420
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350 { |
1479 | 351 ngx_int_t rc; |
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352 ngx_mail_core_srv_conf_t *cscf; |
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353 ngx_mail_imap_srv_conf_t *iscf; |
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354 |
1479 | 355 #if (NGX_MAIL_SSL) |
356 if (ngx_mail_starttls_only(s, c)) { | |
357 return NGX_MAIL_PARSE_INVALID_COMMAND; | |
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358 } |
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359 #endif |
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360 |
1479 | 361 rc = ngx_mail_auth_parse(s, c); |
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362 |
1479 | 363 switch (rc) { |
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364 |
1479 | 365 case NGX_MAIL_AUTH_LOGIN: |
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366 |
1479 | 367 s->out.len = sizeof(imap_username) - 1; |
368 s->out.data = imap_username; | |
369 s->mail_state = ngx_imap_auth_login_username; | |
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370 |
1479 | 371 return NGX_OK; |
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372 |
1479 | 373 case NGX_MAIL_AUTH_PLAIN: |
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374 |
1479 | 375 s->out.len = sizeof(imap_plain_next) - 1; |
376 s->out.data = imap_plain_next; | |
377 s->mail_state = ngx_imap_auth_plain; | |
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378 |
1479 | 379 return NGX_OK; |
380 | |
381 case NGX_MAIL_AUTH_CRAM_MD5: | |
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382 |
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383 iscf = ngx_mail_get_module_srv_conf(s, ngx_mail_imap_module); |
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384 |
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385 if (!(iscf->auth_methods & NGX_MAIL_AUTH_CRAM_MD5_ENABLED)) { |
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386 return NGX_MAIL_PARSE_INVALID_COMMAND; |
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387 } |
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388 |
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389 if (s->salt.data == NULL) { |
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390 cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); |
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391 |
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392 if (ngx_mail_salt(s, c, cscf) != NGX_OK) { |
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393 return NGX_ERROR; |
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394 } |
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395 } |
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396 |
1479 | 397 if (ngx_mail_auth_cram_md5_salt(s, c, "+ ", 2) == NGX_OK) { |
398 s->mail_state = ngx_imap_auth_cram_md5; | |
399 return NGX_OK; | |
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400 } |
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401 |
1479 | 402 return NGX_ERROR; |
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403 } |
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404 |
1479 | 405 return rc; |
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406 } |
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407 |
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408 |
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409 static ngx_int_t |
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410 ngx_mail_imap_capability(ngx_mail_session_t *s, ngx_connection_t *c) |
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411 { |
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412 ngx_mail_imap_srv_conf_t *iscf; |
420
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413 |
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414 iscf = ngx_mail_get_module_srv_conf(s, ngx_mail_imap_module); |
809 | 415 |
1322 | 416 #if (NGX_MAIL_SSL) |
417 | |
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418 if (c->ssl == NULL) { |
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419 ngx_mail_ssl_conf_t *sslcf; |
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420 |
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421 sslcf = ngx_mail_get_module_srv_conf(s, ngx_mail_ssl_module); |
809 | 422 |
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423 if (sslcf->starttls == NGX_MAIL_STARTTLS_ON) { |
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424 s->text = iscf->starttls_capability; |
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425 return NGX_OK; |
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426 } |
1136 | 427 |
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428 if (sslcf->starttls == NGX_MAIL_STARTTLS_ONLY) { |
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429 s->text = iscf->starttls_only_capability; |
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430 return NGX_OK; |
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431 } |
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432 } |
1322 | 433 #endif |
434 | |
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435 s->text = iscf->capability; |
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436 |
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437 return NGX_OK; |
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438 } |
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439 |
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440 |
521 | 441 static ngx_int_t |
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442 ngx_mail_imap_starttls(ngx_mail_session_t *s, ngx_connection_t *c) |
420
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443 { |
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444 #if (NGX_MAIL_SSL) |
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445 ngx_mail_ssl_conf_t *sslcf; |
1136 | 446 |
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447 if (c->ssl == NULL) { |
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448 sslcf = ngx_mail_get_module_srv_conf(s, ngx_mail_ssl_module); |
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449 if (sslcf->starttls) { |
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450 c->read->handler = ngx_mail_starttls_handler; |
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451 return NGX_OK; |
539 | 452 } |
453 } | |
454 | |
455 #endif | |
456 | |
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457 return NGX_MAIL_PARSE_INVALID_COMMAND; |
417
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458 } |