Mercurial > hg > nginx
annotate src/mail/ngx_mail_imap_handler.c @ 4203:a949b15df739
Fixed grammar in a comment.
author | Ruslan Ermilov <ru@nginx.com> |
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date | Wed, 12 Oct 2011 09:34:53 +0000 |
parents | dd1570b6f237 |
children | d620f497c50f |
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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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 ngx_str_set(&s->out, imap_greeting); |
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43 |
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44 c->read->handler = ngx_mail_imap_init_protocol; |
583 | 45 |
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46 ngx_add_timer(c->read, cscf->timeout); |
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47 |
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48 if (ngx_handle_read_event(c->read, 0) != NGX_OK) { |
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49 ngx_mail_close_connection(c); |
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50 } |
539 | 51 |
1136 | 52 ngx_mail_send(c->write); |
539 | 53 } |
54 | |
55 | |
56 void | |
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57 ngx_mail_imap_init_protocol(ngx_event_t *rev) |
539 | 58 { |
521 | 59 ngx_connection_t *c; |
1136 | 60 ngx_mail_session_t *s; |
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61 ngx_mail_imap_srv_conf_t *iscf; |
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62 |
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63 c = rev->data; |
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64 |
541 | 65 c->log->action = "in auth state"; |
66 | |
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67 if (rev->timedout) { |
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68 ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, "client timed out"); |
577 | 69 c->timedout = 1; |
1136 | 70 ngx_mail_close_connection(c); |
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71 return; |
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72 } |
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73 |
539 | 74 s = c->data; |
521 | 75 |
419
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76 if (s->buffer == NULL) { |
583 | 77 if (ngx_array_init(&s->args, c->pool, 2, sizeof(ngx_str_t)) |
78 == NGX_ERROR) | |
79 { | |
1136 | 80 ngx_mail_session_internal_server_error(s); |
583 | 81 return; |
82 } | |
83 | |
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84 iscf = ngx_mail_get_module_srv_conf(s, ngx_mail_imap_module); |
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85 |
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86 s->buffer = ngx_create_temp_buf(c->pool, iscf->client_buffer_size); |
583 | 87 if (s->buffer == NULL) { |
1136 | 88 ngx_mail_session_internal_server_error(s); |
583 | 89 return; |
90 } | |
419
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91 } |
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92 |
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93 s->mail_state = ngx_imap_start; |
1477 | 94 c->read->handler = ngx_mail_imap_auth_state; |
1136 | 95 |
1477 | 96 ngx_mail_imap_auth_state(rev); |
1136 | 97 } |
98 | |
99 | |
100 void | |
1477 | 101 ngx_mail_imap_auth_state(ngx_event_t *rev) |
1136 | 102 { |
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103 u_char *p, *dst, *src, *end; |
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104 ngx_str_t *arg; |
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105 ngx_int_t rc; |
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106 ngx_uint_t tag, i; |
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107 ngx_connection_t *c; |
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108 ngx_mail_session_t *s; |
1136 | 109 |
110 c = rev->data; | |
111 s = c->data; | |
112 | |
113 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, c->log, 0, "imap auth state"); | |
114 | |
115 if (rev->timedout) { | |
116 ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, "client timed out"); | |
117 c->timedout = 1; | |
118 ngx_mail_close_connection(c); | |
119 return; | |
120 } | |
121 | |
122 if (s->out.len) { | |
123 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, c->log, 0, "imap send handler busy"); | |
124 s->blocked = 1; | |
125 return; | |
126 } | |
127 | |
128 s->blocked = 0; | |
129 | |
1482 | 130 rc = ngx_mail_read_command(s, c); |
527 | 131 |
132 if (rc == NGX_AGAIN || rc == NGX_ERROR) { | |
133 return; | |
134 } | |
135 | |
136 tag = 1; | |
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137 s->text.len = 0; |
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138 ngx_str_set(&s->out, imap_ok); |
527 | 139 |
140 if (rc == NGX_OK) { | |
141 | |
1136 | 142 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, "imap auth command: %i", |
527 | 143 s->command); |
144 | |
543 | 145 if (s->backslash) { |
146 | |
147 arg = s->args.elts; | |
148 | |
149 for (i = 0; i < s->args.nelts; i++) { | |
150 dst = arg[i].data; | |
151 end = dst + arg[i].len; | |
152 | |
153 for (src = dst; src < end; dst++) { | |
154 *dst = *src; | |
155 if (*src++ == '\\') { | |
156 *dst = *src++; | |
157 } | |
158 } | |
159 | |
160 arg[i].len = dst - arg[i].data; | |
161 } | |
162 | |
163 s->backslash = 0; | |
164 } | |
165 | |
1323 | 166 switch (s->mail_state) { |
167 | |
168 case ngx_imap_start: | |
169 | |
170 switch (s->command) { | |
171 | |
172 case NGX_IMAP_LOGIN: | |
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173 rc = ngx_mail_imap_login(s, c); |
1323 | 174 break; |
175 | |
176 case NGX_IMAP_AUTHENTICATE: | |
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177 rc = ngx_mail_imap_authenticate(s, c); |
1479 | 178 tag = (rc != NGX_OK); |
1323 | 179 break; |
180 | |
181 case NGX_IMAP_CAPABILITY: | |
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182 rc = ngx_mail_imap_capability(s, c); |
1323 | 183 break; |
184 | |
185 case NGX_IMAP_LOGOUT: | |
186 s->quit = 1; | |
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187 ngx_str_set(&s->text, imap_bye); |
1323 | 188 break; |
189 | |
190 case NGX_IMAP_NOOP: | |
191 break; | |
192 | |
193 case NGX_IMAP_STARTTLS: | |
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194 rc = ngx_mail_imap_starttls(s, c); |
1323 | 195 break; |
196 | |
197 default: | |
198 rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
199 break; | |
200 } | |
201 | |
202 break; | |
203 | |
204 case ngx_imap_auth_login_username: | |
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205 rc = ngx_mail_auth_login_username(s, c, 0); |
1323 | 206 |
207 tag = 0; | |
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208 ngx_str_set(&s->out, imap_password); |
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209 s->mail_state = ngx_imap_auth_login_password; |
1323 | 210 |
211 break; | |
212 | |
213 case ngx_imap_auth_login_password: | |
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214 rc = ngx_mail_auth_login_password(s, c); |
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215 break; |
1323 | 216 |
217 case ngx_imap_auth_plain: | |
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218 rc = ngx_mail_auth_plain(s, c, 0); |
527 | 219 break; |
220 | |
1323 | 221 case ngx_imap_auth_cram_md5: |
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222 rc = ngx_mail_auth_cram_md5(s, c); |
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223 break; |
527 | 224 } |
225 | |
226 } else if (rc == NGX_IMAP_NEXT) { | |
227 tag = 0; | |
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228 ngx_str_set(&s->out, imap_next); |
527 | 229 } |
230 | |
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231 switch (rc) { |
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232 |
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233 case NGX_DONE: |
1482 | 234 ngx_mail_auth(s, c); |
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235 return; |
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236 |
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237 case NGX_ERROR: |
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238 ngx_mail_session_internal_server_error(s); |
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239 return; |
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240 |
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241 case NGX_MAIL_PARSE_INVALID_COMMAND: |
1323 | 242 s->state = 0; |
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243 ngx_str_set(&s->out, imap_invalid_command); |
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244 s->mail_state = ngx_imap_start; |
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245 break; |
527 | 246 } |
247 | |
248 if (tag) { | |
543 | 249 if (s->tag.len == 0) { |
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250 ngx_str_set(&s->tag, imap_star); |
543 | 251 } |
252 | |
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253 if (s->tagged_line.len < s->tag.len + s->text.len + s->out.len) { |
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254 s->tagged_line.len = s->tag.len + s->text.len + s->out.len; |
2049 | 255 s->tagged_line.data = ngx_pnalloc(c->pool, s->tagged_line.len); |
539 | 256 if (s->tagged_line.data == NULL) { |
1136 | 257 ngx_mail_close_connection(c); |
527 | 258 return; |
259 } | |
260 } | |
261 | |
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262 p = s->tagged_line.data; |
539 | 263 |
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264 if (s->text.len) { |
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265 p = ngx_cpymem(p, s->text.data, s->text.len); |
527 | 266 } |
267 | |
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268 p = ngx_cpymem(p, s->tag.data, s->tag.len); |
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269 ngx_memcpy(p, s->out.data, s->out.len); |
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270 |
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271 s->out.len = s->text.len + s->tag.len + s->out.len; |
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272 s->out.data = s->tagged_line.data; |
527 | 273 } |
274 | |
539 | 275 if (rc != NGX_IMAP_NEXT) { |
276 s->args.nelts = 0; | |
1323 | 277 |
278 if (s->state) { | |
279 /* preserve tag */ | |
280 s->arg_start = s->buffer->start + s->tag.len; | |
281 s->buffer->pos = s->arg_start; | |
282 s->buffer->last = s->arg_start; | |
283 | |
284 } else { | |
285 s->buffer->pos = s->buffer->start; | |
286 s->buffer->last = s->buffer->start; | |
287 s->tag.len = 0; | |
288 } | |
527 | 289 } |
290 | |
1136 | 291 ngx_mail_send(c->write); |
521 | 292 } |
293 | |
294 | |
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295 static ngx_int_t |
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296 ngx_mail_imap_login(ngx_mail_session_t *s, ngx_connection_t *c) |
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297 { |
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298 ngx_str_t *arg; |
1479 | 299 |
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300 #if (NGX_MAIL_SSL) |
1479 | 301 if (ngx_mail_starttls_only(s, c)) { |
302 return NGX_MAIL_PARSE_INVALID_COMMAND; | |
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303 } |
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304 #endif |
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305 |
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306 arg = s->args.elts; |
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307 |
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308 if (s->args.nelts != 2 || arg[0].len == 0) { |
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309 return NGX_MAIL_PARSE_INVALID_COMMAND; |
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310 } |
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311 |
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312 s->login.len = arg[0].len; |
2049 | 313 s->login.data = ngx_pnalloc(c->pool, s->login.len); |
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314 if (s->login.data == NULL) { |
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315 return NGX_ERROR; |
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316 } |
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317 |
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318 ngx_memcpy(s->login.data, arg[0].data, s->login.len); |
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319 |
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320 s->passwd.len = arg[1].len; |
2049 | 321 s->passwd.data = ngx_pnalloc(c->pool, s->passwd.len); |
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322 if (s->passwd.data == NULL) { |
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323 return NGX_ERROR; |
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324 } |
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325 |
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326 ngx_memcpy(s->passwd.data, arg[1].data, s->passwd.len); |
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327 |
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328 #if (NGX_DEBUG_MAIL_PASSWD) |
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329 ngx_log_debug2(NGX_LOG_DEBUG_MAIL, c->log, 0, |
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330 "imap login:\"%V\" passwd:\"%V\"", |
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331 &s->login, &s->passwd); |
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332 #else |
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333 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, |
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334 "imap login:\"%V\"", &s->login); |
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335 #endif |
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336 |
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337 return NGX_DONE; |
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338 } |
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339 |
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340 |
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341 static ngx_int_t |
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342 ngx_mail_imap_authenticate(ngx_mail_session_t *s, ngx_connection_t *c) |
420
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343 { |
1479 | 344 ngx_int_t rc; |
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345 ngx_mail_core_srv_conf_t *cscf; |
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346 ngx_mail_imap_srv_conf_t *iscf; |
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347 |
1479 | 348 #if (NGX_MAIL_SSL) |
349 if (ngx_mail_starttls_only(s, c)) { | |
350 return NGX_MAIL_PARSE_INVALID_COMMAND; | |
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351 } |
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352 #endif |
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353 |
1479 | 354 rc = ngx_mail_auth_parse(s, c); |
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355 |
1479 | 356 switch (rc) { |
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357 |
1479 | 358 case NGX_MAIL_AUTH_LOGIN: |
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359 |
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360 ngx_str_set(&s->out, imap_username); |
1479 | 361 s->mail_state = ngx_imap_auth_login_username; |
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362 |
1479 | 363 return NGX_OK; |
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364 |
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365 case NGX_MAIL_AUTH_LOGIN_USERNAME: |
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366 |
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367 ngx_str_set(&s->out, imap_password); |
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368 s->mail_state = ngx_imap_auth_login_password; |
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369 |
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370 return ngx_mail_auth_login_username(s, c, 1); |
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371 |
1479 | 372 case NGX_MAIL_AUTH_PLAIN: |
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373 |
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374 ngx_str_set(&s->out, imap_plain_next); |
1479 | 375 s->mail_state = ngx_imap_auth_plain; |
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376 |
1479 | 377 return NGX_OK; |
378 | |
379 case NGX_MAIL_AUTH_CRAM_MD5: | |
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380 |
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381 iscf = ngx_mail_get_module_srv_conf(s, ngx_mail_imap_module); |
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382 |
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383 if (!(iscf->auth_methods & NGX_MAIL_AUTH_CRAM_MD5_ENABLED)) { |
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384 return NGX_MAIL_PARSE_INVALID_COMMAND; |
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385 } |
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386 |
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387 if (s->salt.data == NULL) { |
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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 (ngx_mail_salt(s, c, cscf) != NGX_OK) { |
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391 return NGX_ERROR; |
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392 } |
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393 } |
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394 |
1479 | 395 if (ngx_mail_auth_cram_md5_salt(s, c, "+ ", 2) == NGX_OK) { |
396 s->mail_state = ngx_imap_auth_cram_md5; | |
397 return NGX_OK; | |
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398 } |
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399 |
1479 | 400 return NGX_ERROR; |
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401 } |
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402 |
1479 | 403 return rc; |
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404 } |
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405 |
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406 |
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407 static ngx_int_t |
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408 ngx_mail_imap_capability(ngx_mail_session_t *s, ngx_connection_t *c) |
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409 { |
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410 ngx_mail_imap_srv_conf_t *iscf; |
420
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411 |
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412 iscf = ngx_mail_get_module_srv_conf(s, ngx_mail_imap_module); |
809 | 413 |
1322 | 414 #if (NGX_MAIL_SSL) |
415 | |
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416 if (c->ssl == NULL) { |
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417 ngx_mail_ssl_conf_t *sslcf; |
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418 |
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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 = iscf->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 = iscf->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 = iscf->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 } |