Mercurial > hg > nginx
annotate src/mail/ngx_mail_imap_handler.c @ 7857:76871d1340ea stable-1.20
Version bump.
author | Maxim Dounin <mdounin@mdounin.ru> |
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date | Tue, 25 May 2021 15:29:54 +0300 |
parents | da0a85e91587 |
children | ccdf83bee8c1 |
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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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); |
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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; | |
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126 |
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127 if (ngx_handle_read_event(c->read, 0) != NGX_OK) { |
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128 ngx_mail_close_connection(c); |
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129 return; |
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130 } |
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131 |
1136 | 132 return; |
133 } | |
134 | |
135 s->blocked = 0; | |
136 | |
1482 | 137 rc = ngx_mail_read_command(s, c); |
527 | 138 |
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139 if (rc == NGX_AGAIN) { |
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140 if (ngx_handle_read_event(c->read, 0) != NGX_OK) { |
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141 ngx_mail_session_internal_server_error(s); |
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142 return; |
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143 } |
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144 |
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145 return; |
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146 } |
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147 |
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148 if (rc == NGX_ERROR) { |
527 | 149 return; |
150 } | |
151 | |
152 tag = 1; | |
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153 s->text.len = 0; |
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154 ngx_str_set(&s->out, imap_ok); |
527 | 155 |
156 if (rc == NGX_OK) { | |
157 | |
1136 | 158 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, "imap auth command: %i", |
527 | 159 s->command); |
160 | |
543 | 161 if (s->backslash) { |
162 | |
163 arg = s->args.elts; | |
164 | |
165 for (i = 0; i < s->args.nelts; i++) { | |
166 dst = arg[i].data; | |
167 end = dst + arg[i].len; | |
168 | |
169 for (src = dst; src < end; dst++) { | |
170 *dst = *src; | |
171 if (*src++ == '\\') { | |
172 *dst = *src++; | |
173 } | |
174 } | |
175 | |
176 arg[i].len = dst - arg[i].data; | |
177 } | |
178 | |
179 s->backslash = 0; | |
180 } | |
181 | |
1323 | 182 switch (s->mail_state) { |
183 | |
184 case ngx_imap_start: | |
185 | |
186 switch (s->command) { | |
187 | |
188 case NGX_IMAP_LOGIN: | |
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189 rc = ngx_mail_imap_login(s, c); |
1323 | 190 break; |
191 | |
192 case NGX_IMAP_AUTHENTICATE: | |
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193 rc = ngx_mail_imap_authenticate(s, c); |
1479 | 194 tag = (rc != NGX_OK); |
1323 | 195 break; |
196 | |
197 case NGX_IMAP_CAPABILITY: | |
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198 rc = ngx_mail_imap_capability(s, c); |
1323 | 199 break; |
200 | |
201 case NGX_IMAP_LOGOUT: | |
202 s->quit = 1; | |
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203 ngx_str_set(&s->text, imap_bye); |
1323 | 204 break; |
205 | |
206 case NGX_IMAP_NOOP: | |
207 break; | |
208 | |
209 case NGX_IMAP_STARTTLS: | |
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210 rc = ngx_mail_imap_starttls(s, c); |
1323 | 211 break; |
212 | |
213 default: | |
214 rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
215 break; | |
216 } | |
217 | |
218 break; | |
219 | |
220 case ngx_imap_auth_login_username: | |
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221 rc = ngx_mail_auth_login_username(s, c, 0); |
1323 | 222 |
223 tag = 0; | |
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224 ngx_str_set(&s->out, imap_password); |
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225 s->mail_state = ngx_imap_auth_login_password; |
1323 | 226 |
227 break; | |
228 | |
229 case ngx_imap_auth_login_password: | |
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230 rc = ngx_mail_auth_login_password(s, c); |
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231 break; |
1323 | 232 |
233 case ngx_imap_auth_plain: | |
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234 rc = ngx_mail_auth_plain(s, c, 0); |
527 | 235 break; |
236 | |
1323 | 237 case ngx_imap_auth_cram_md5: |
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238 rc = ngx_mail_auth_cram_md5(s, c); |
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239 break; |
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240 |
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241 case ngx_imap_auth_external: |
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242 rc = ngx_mail_auth_external(s, c, 0); |
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243 break; |
527 | 244 } |
245 | |
246 } else if (rc == NGX_IMAP_NEXT) { | |
247 tag = 0; | |
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248 ngx_str_set(&s->out, imap_next); |
527 | 249 } |
250 | |
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251 switch (rc) { |
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252 |
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253 case NGX_DONE: |
1482 | 254 ngx_mail_auth(s, c); |
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255 return; |
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256 |
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257 case NGX_ERROR: |
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258 ngx_mail_session_internal_server_error(s); |
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259 return; |
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260 |
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261 case NGX_MAIL_PARSE_INVALID_COMMAND: |
1323 | 262 s->state = 0; |
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263 ngx_str_set(&s->out, imap_invalid_command); |
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264 s->mail_state = ngx_imap_start; |
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265 break; |
527 | 266 } |
267 | |
268 if (tag) { | |
543 | 269 if (s->tag.len == 0) { |
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270 ngx_str_set(&s->tag, imap_star); |
543 | 271 } |
272 | |
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273 if (s->tagged_line.len < s->tag.len + s->text.len + s->out.len) { |
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274 s->tagged_line.len = s->tag.len + s->text.len + s->out.len; |
2049 | 275 s->tagged_line.data = ngx_pnalloc(c->pool, s->tagged_line.len); |
539 | 276 if (s->tagged_line.data == NULL) { |
1136 | 277 ngx_mail_close_connection(c); |
527 | 278 return; |
279 } | |
280 } | |
281 | |
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282 p = s->tagged_line.data; |
539 | 283 |
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284 if (s->text.len) { |
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285 p = ngx_cpymem(p, s->text.data, s->text.len); |
527 | 286 } |
287 | |
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288 p = ngx_cpymem(p, s->tag.data, s->tag.len); |
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289 ngx_memcpy(p, s->out.data, s->out.len); |
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290 |
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291 s->out.len = s->text.len + s->tag.len + s->out.len; |
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292 s->out.data = s->tagged_line.data; |
527 | 293 } |
294 | |
539 | 295 if (rc != NGX_IMAP_NEXT) { |
296 s->args.nelts = 0; | |
1323 | 297 |
298 if (s->state) { | |
299 /* preserve tag */ | |
300 s->arg_start = s->buffer->start + s->tag.len; | |
301 s->buffer->pos = s->arg_start; | |
302 s->buffer->last = s->arg_start; | |
303 | |
304 } else { | |
305 s->buffer->pos = s->buffer->start; | |
306 s->buffer->last = s->buffer->start; | |
307 s->tag.len = 0; | |
308 } | |
527 | 309 } |
310 | |
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311 if (ngx_handle_read_event(c->read, 0) != NGX_OK) { |
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312 ngx_mail_session_internal_server_error(s); |
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313 return; |
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314 } |
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315 |
1136 | 316 ngx_mail_send(c->write); |
521 | 317 } |
318 | |
319 | |
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320 static ngx_int_t |
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321 ngx_mail_imap_login(ngx_mail_session_t *s, ngx_connection_t *c) |
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322 { |
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323 ngx_str_t *arg; |
1479 | 324 |
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325 #if (NGX_MAIL_SSL) |
1479 | 326 if (ngx_mail_starttls_only(s, c)) { |
327 return NGX_MAIL_PARSE_INVALID_COMMAND; | |
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328 } |
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329 #endif |
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330 |
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331 arg = s->args.elts; |
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332 |
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333 if (s->args.nelts != 2 || arg[0].len == 0) { |
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334 return NGX_MAIL_PARSE_INVALID_COMMAND; |
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335 } |
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336 |
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337 s->login.len = arg[0].len; |
2049 | 338 s->login.data = ngx_pnalloc(c->pool, s->login.len); |
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339 if (s->login.data == NULL) { |
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340 return NGX_ERROR; |
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341 } |
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342 |
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343 ngx_memcpy(s->login.data, arg[0].data, s->login.len); |
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344 |
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345 s->passwd.len = arg[1].len; |
2049 | 346 s->passwd.data = ngx_pnalloc(c->pool, s->passwd.len); |
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347 if (s->passwd.data == NULL) { |
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348 return NGX_ERROR; |
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349 } |
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350 |
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351 ngx_memcpy(s->passwd.data, arg[1].data, s->passwd.len); |
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352 |
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353 #if (NGX_DEBUG_MAIL_PASSWD) |
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354 ngx_log_debug2(NGX_LOG_DEBUG_MAIL, c->log, 0, |
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355 "imap login:\"%V\" passwd:\"%V\"", |
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356 &s->login, &s->passwd); |
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357 #else |
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358 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, |
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359 "imap login:\"%V\"", &s->login); |
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360 #endif |
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361 |
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362 return NGX_DONE; |
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363 } |
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364 |
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365 |
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366 static ngx_int_t |
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367 ngx_mail_imap_authenticate(ngx_mail_session_t *s, ngx_connection_t *c) |
420
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368 { |
1479 | 369 ngx_int_t rc; |
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370 ngx_mail_core_srv_conf_t *cscf; |
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371 ngx_mail_imap_srv_conf_t *iscf; |
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372 |
1479 | 373 #if (NGX_MAIL_SSL) |
374 if (ngx_mail_starttls_only(s, c)) { | |
375 return NGX_MAIL_PARSE_INVALID_COMMAND; | |
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376 } |
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377 #endif |
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378 |
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379 iscf = ngx_mail_get_module_srv_conf(s, ngx_mail_imap_module); |
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380 |
1479 | 381 rc = ngx_mail_auth_parse(s, c); |
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382 |
1479 | 383 switch (rc) { |
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384 |
1479 | 385 case NGX_MAIL_AUTH_LOGIN: |
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386 |
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387 ngx_str_set(&s->out, imap_username); |
1479 | 388 s->mail_state = ngx_imap_auth_login_username; |
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389 |
1479 | 390 return NGX_OK; |
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391 |
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392 case NGX_MAIL_AUTH_LOGIN_USERNAME: |
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393 |
3516
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394 ngx_str_set(&s->out, imap_password); |
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395 s->mail_state = ngx_imap_auth_login_password; |
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396 |
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397 return ngx_mail_auth_login_username(s, c, 1); |
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398 |
1479 | 399 case NGX_MAIL_AUTH_PLAIN: |
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400 |
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401 ngx_str_set(&s->out, imap_plain_next); |
1479 | 402 s->mail_state = ngx_imap_auth_plain; |
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403 |
1479 | 404 return NGX_OK; |
405 | |
406 case NGX_MAIL_AUTH_CRAM_MD5: | |
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407 |
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408 if (!(iscf->auth_methods & NGX_MAIL_AUTH_CRAM_MD5_ENABLED)) { |
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409 return NGX_MAIL_PARSE_INVALID_COMMAND; |
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410 } |
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411 |
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412 if (s->salt.data == NULL) { |
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413 cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); |
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414 |
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415 if (ngx_mail_salt(s, c, cscf) != NGX_OK) { |
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416 return NGX_ERROR; |
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417 } |
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418 } |
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419 |
1479 | 420 if (ngx_mail_auth_cram_md5_salt(s, c, "+ ", 2) == NGX_OK) { |
421 s->mail_state = ngx_imap_auth_cram_md5; | |
422 return NGX_OK; | |
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423 } |
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424 |
1479 | 425 return NGX_ERROR; |
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Mail: support SASL EXTERNAL (RFC 4422).
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426 |
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427 case NGX_MAIL_AUTH_EXTERNAL: |
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428 |
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429 if (!(iscf->auth_methods & NGX_MAIL_AUTH_EXTERNAL_ENABLED)) { |
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430 return NGX_MAIL_PARSE_INVALID_COMMAND; |
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431 } |
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432 |
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433 ngx_str_set(&s->out, imap_username); |
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434 s->mail_state = ngx_imap_auth_external; |
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435 |
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436 return NGX_OK; |
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437 } |
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438 |
1479 | 439 return rc; |
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440 } |
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441 |
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442 |
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443 static ngx_int_t |
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444 ngx_mail_imap_capability(ngx_mail_session_t *s, ngx_connection_t *c) |
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445 { |
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446 ngx_mail_imap_srv_conf_t *iscf; |
420
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447 |
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448 iscf = ngx_mail_get_module_srv_conf(s, ngx_mail_imap_module); |
809 | 449 |
1322 | 450 #if (NGX_MAIL_SSL) |
451 | |
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452 if (c->ssl == NULL) { |
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453 ngx_mail_ssl_conf_t *sslcf; |
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454 |
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455 sslcf = ngx_mail_get_module_srv_conf(s, ngx_mail_ssl_module); |
809 | 456 |
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457 if (sslcf->starttls == NGX_MAIL_STARTTLS_ON) { |
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458 s->text = iscf->starttls_capability; |
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459 return NGX_OK; |
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460 } |
1136 | 461 |
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462 if (sslcf->starttls == NGX_MAIL_STARTTLS_ONLY) { |
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463 s->text = iscf->starttls_only_capability; |
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464 return NGX_OK; |
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465 } |
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466 } |
1322 | 467 #endif |
468 | |
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|
469 s->text = iscf->capability; |
894
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|
470 |
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471 return NGX_OK; |
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|
472 } |
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|
473 |
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|
474 |
521 | 475 static ngx_int_t |
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|
476 ngx_mail_imap_starttls(ngx_mail_session_t *s, ngx_connection_t *c) |
420
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|
477 { |
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478 #if (NGX_MAIL_SSL) |
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479 ngx_mail_ssl_conf_t *sslcf; |
1136 | 480 |
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481 if (c->ssl == NULL) { |
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482 sslcf = ngx_mail_get_module_srv_conf(s, ngx_mail_ssl_module); |
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483 if (sslcf->starttls) { |
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484 c->read->handler = ngx_mail_starttls_handler; |
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485 return NGX_OK; |
539 | 486 } |
487 } | |
488 | |
489 #endif | |
490 | |
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491 return NGX_MAIL_PARSE_INVALID_COMMAND; |
417
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nginx-0.0.10-2004-09-07-19:29:22 import
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415
diff
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|
492 } |