Mercurial > hg > nginx-quic
annotate src/mail/ngx_mail_imap_handler.c @ 4159:718f2154b813 stable-1.0
Merging r3933, r4154:
A new fix for the case when ssl_session_cache defined, but ssl is not
enabled in any server. The previous r1033 does not help when unused zone
becomes used after reconfiguration, so it is backed out.
The initial thought was to make SSL modules independed from SSL implementation
and to keep OpenSSL code dependance as much as in separate files.
author | Igor Sysoev <igor@sysoev.ru> |
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date | Fri, 30 Sep 2011 13:36:33 +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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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) |
413
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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 } |