Mercurial > hg > nginx
annotate src/mail/ngx_mail_imap_handler.c @ 8809:6f434af59257 quic
Core: the ngx_event_udp.h header file.
author | Vladimir Homutov <vl@nginx.com> |
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date | Mon, 12 Jul 2021 16:40:57 +0300 |
parents | b38728495e1a |
children | c690a902bfec |
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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7 |
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8 #include <ngx_config.h> |
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9 #include <ngx_core.h> |
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10 #include <ngx_event.h> |
1136 | 11 #include <ngx_mail.h> |
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12 #include <ngx_mail_imap_module.h> |
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13 |
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14 |
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15 static ngx_int_t ngx_mail_imap_login(ngx_mail_session_t *s, |
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16 ngx_connection_t *c); |
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17 static ngx_int_t ngx_mail_imap_authenticate(ngx_mail_session_t *s, |
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18 ngx_connection_t *c); |
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19 static ngx_int_t ngx_mail_imap_capability(ngx_mail_session_t *s, |
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20 ngx_connection_t *c); |
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21 static ngx_int_t ngx_mail_imap_starttls(ngx_mail_session_t *s, |
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22 ngx_connection_t *c); |
539 | 23 |
413
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24 |
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25 static u_char imap_greeting[] = "* OK IMAP4 ready" CRLF; |
543 | 26 static u_char imap_star[] = "* "; |
529 | 27 static u_char imap_ok[] = "OK completed" CRLF; |
527 | 28 static u_char imap_next[] = "+ OK" CRLF; |
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29 static u_char imap_plain_next[] = "+ " CRLF; |
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30 static u_char imap_username[] = "+ VXNlcm5hbWU6" CRLF; |
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31 static u_char imap_password[] = "+ UGFzc3dvcmQ6" CRLF; |
527 | 32 static u_char imap_bye[] = "* BYE" CRLF; |
33 static u_char imap_invalid_command[] = "BAD invalid command" CRLF; | |
34 | |
521 | 35 |
36 void | |
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37 ngx_mail_imap_init_session(ngx_mail_session_t *s, ngx_connection_t *c) |
413
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38 { |
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39 ngx_mail_core_srv_conf_t *cscf; |
641 | 40 |
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41 cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); |
541 | 42 |
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43 ngx_str_set(&s->out, imap_greeting); |
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44 |
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45 c->read->handler = ngx_mail_imap_init_protocol; |
583 | 46 |
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47 ngx_add_timer(c->read, cscf->timeout); |
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48 |
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49 if (ngx_handle_read_event(c->read, 0) != NGX_OK) { |
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50 ngx_mail_close_connection(c); |
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51 } |
539 | 52 |
1136 | 53 ngx_mail_send(c->write); |
539 | 54 } |
55 | |
56 | |
57 void | |
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58 ngx_mail_imap_init_protocol(ngx_event_t *rev) |
539 | 59 { |
521 | 60 ngx_connection_t *c; |
1136 | 61 ngx_mail_session_t *s; |
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62 ngx_mail_imap_srv_conf_t *iscf; |
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63 |
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64 c = rev->data; |
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65 |
541 | 66 c->log->action = "in auth state"; |
67 | |
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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; |
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105 ngx_int_t rc; |
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106 ngx_uint_t tag; |
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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; | |
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125 |
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126 if (ngx_handle_read_event(c->read, 0) != NGX_OK) { |
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127 ngx_mail_close_connection(c); |
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128 return; |
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129 } |
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130 |
1136 | 131 return; |
132 } | |
133 | |
134 s->blocked = 0; | |
135 | |
1482 | 136 rc = ngx_mail_read_command(s, c); |
527 | 137 |
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138 if (rc == NGX_AGAIN) { |
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139 if (ngx_handle_read_event(c->read, 0) != NGX_OK) { |
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140 ngx_mail_session_internal_server_error(s); |
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141 return; |
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142 } |
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143 |
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144 return; |
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145 } |
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146 |
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147 if (rc == NGX_ERROR) { |
527 | 148 return; |
149 } | |
150 | |
151 tag = 1; | |
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152 s->text.len = 0; |
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153 ngx_str_set(&s->out, imap_ok); |
527 | 154 |
155 if (rc == NGX_OK) { | |
156 | |
1136 | 157 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, "imap auth command: %i", |
527 | 158 s->command); |
159 | |
1323 | 160 switch (s->mail_state) { |
161 | |
162 case ngx_imap_start: | |
163 | |
164 switch (s->command) { | |
165 | |
166 case NGX_IMAP_LOGIN: | |
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167 rc = ngx_mail_imap_login(s, c); |
1323 | 168 break; |
169 | |
170 case NGX_IMAP_AUTHENTICATE: | |
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171 rc = ngx_mail_imap_authenticate(s, c); |
1479 | 172 tag = (rc != NGX_OK); |
1323 | 173 break; |
174 | |
175 case NGX_IMAP_CAPABILITY: | |
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176 rc = ngx_mail_imap_capability(s, c); |
1323 | 177 break; |
178 | |
179 case NGX_IMAP_LOGOUT: | |
180 s->quit = 1; | |
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181 ngx_str_set(&s->text, imap_bye); |
1323 | 182 break; |
183 | |
184 case NGX_IMAP_NOOP: | |
185 break; | |
186 | |
187 case NGX_IMAP_STARTTLS: | |
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188 rc = ngx_mail_imap_starttls(s, c); |
1323 | 189 break; |
190 | |
191 default: | |
192 rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
193 break; | |
194 } | |
195 | |
196 break; | |
197 | |
198 case ngx_imap_auth_login_username: | |
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199 rc = ngx_mail_auth_login_username(s, c, 0); |
1323 | 200 |
201 tag = 0; | |
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202 ngx_str_set(&s->out, imap_password); |
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203 s->mail_state = ngx_imap_auth_login_password; |
1323 | 204 |
205 break; | |
206 | |
207 case ngx_imap_auth_login_password: | |
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208 rc = ngx_mail_auth_login_password(s, c); |
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209 break; |
1323 | 210 |
211 case ngx_imap_auth_plain: | |
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212 rc = ngx_mail_auth_plain(s, c, 0); |
527 | 213 break; |
214 | |
1323 | 215 case ngx_imap_auth_cram_md5: |
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216 rc = ngx_mail_auth_cram_md5(s, c); |
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217 break; |
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218 |
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219 case ngx_imap_auth_external: |
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220 rc = ngx_mail_auth_external(s, c, 0); |
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221 break; |
527 | 222 } |
223 | |
224 } else if (rc == NGX_IMAP_NEXT) { | |
225 tag = 0; | |
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226 ngx_str_set(&s->out, imap_next); |
527 | 227 } |
228 | |
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229 if (s->buffer->pos < s->buffer->last) { |
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230 s->blocked = 1; |
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231 } |
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232 |
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233 switch (rc) { |
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234 |
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235 case NGX_DONE: |
1482 | 236 ngx_mail_auth(s, c); |
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237 return; |
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238 |
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239 case NGX_ERROR: |
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240 ngx_mail_session_internal_server_error(s); |
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241 return; |
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242 |
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243 case NGX_MAIL_PARSE_INVALID_COMMAND: |
1323 | 244 s->state = 0; |
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245 ngx_str_set(&s->out, imap_invalid_command); |
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246 s->mail_state = ngx_imap_start; |
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247 break; |
527 | 248 } |
249 | |
250 if (tag) { | |
543 | 251 if (s->tag.len == 0) { |
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252 ngx_str_set(&s->tag, imap_star); |
543 | 253 } |
254 | |
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255 if (s->tagged_line.len < s->tag.len + s->text.len + s->out.len) { |
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256 s->tagged_line.len = s->tag.len + s->text.len + s->out.len; |
2049 | 257 s->tagged_line.data = ngx_pnalloc(c->pool, s->tagged_line.len); |
539 | 258 if (s->tagged_line.data == NULL) { |
1136 | 259 ngx_mail_close_connection(c); |
527 | 260 return; |
261 } | |
262 } | |
263 | |
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264 p = s->tagged_line.data; |
539 | 265 |
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266 if (s->text.len) { |
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267 p = ngx_cpymem(p, s->text.data, s->text.len); |
527 | 268 } |
269 | |
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270 p = ngx_cpymem(p, s->tag.data, s->tag.len); |
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271 ngx_memcpy(p, s->out.data, s->out.len); |
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272 |
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273 s->out.len = s->text.len + s->tag.len + s->out.len; |
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274 s->out.data = s->tagged_line.data; |
527 | 275 } |
276 | |
539 | 277 if (rc != NGX_IMAP_NEXT) { |
278 s->args.nelts = 0; | |
1323 | 279 |
280 if (s->state) { | |
281 /* preserve tag */ | |
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282 s->arg_start = s->buffer->pos; |
1323 | 283 |
284 } else { | |
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285 if (s->buffer->pos == s->buffer->last) { |
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286 s->buffer->pos = s->buffer->start; |
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287 s->buffer->last = s->buffer->start; |
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288 } |
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289 |
1323 | 290 s->tag.len = 0; |
291 } | |
527 | 292 } |
293 | |
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294 if (ngx_handle_read_event(c->read, 0) != NGX_OK) { |
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295 ngx_mail_session_internal_server_error(s); |
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296 return; |
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297 } |
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298 |
1136 | 299 ngx_mail_send(c->write); |
521 | 300 } |
301 | |
302 | |
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303 static ngx_int_t |
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304 ngx_mail_imap_login(ngx_mail_session_t *s, ngx_connection_t *c) |
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305 { |
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306 ngx_str_t *arg; |
1479 | 307 |
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308 #if (NGX_MAIL_SSL) |
1479 | 309 if (ngx_mail_starttls_only(s, c)) { |
310 return NGX_MAIL_PARSE_INVALID_COMMAND; | |
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311 } |
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312 #endif |
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313 |
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314 arg = s->args.elts; |
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315 |
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316 if (s->args.nelts != 2 || arg[0].len == 0) { |
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317 return NGX_MAIL_PARSE_INVALID_COMMAND; |
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318 } |
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319 |
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320 s->login.len = arg[0].len; |
2049 | 321 s->login.data = ngx_pnalloc(c->pool, s->login.len); |
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322 if (s->login.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->login.data, arg[0].data, s->login.len); |
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327 |
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328 s->passwd.len = arg[1].len; |
2049 | 329 s->passwd.data = ngx_pnalloc(c->pool, s->passwd.len); |
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330 if (s->passwd.data == NULL) { |
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331 return NGX_ERROR; |
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332 } |
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333 |
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334 ngx_memcpy(s->passwd.data, arg[1].data, s->passwd.len); |
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335 |
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336 #if (NGX_DEBUG_MAIL_PASSWD) |
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337 ngx_log_debug2(NGX_LOG_DEBUG_MAIL, c->log, 0, |
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338 "imap login:\"%V\" passwd:\"%V\"", |
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339 &s->login, &s->passwd); |
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340 #else |
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341 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, |
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342 "imap login:\"%V\"", &s->login); |
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343 #endif |
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344 |
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345 return NGX_DONE; |
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346 } |
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347 |
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348 |
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349 static ngx_int_t |
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350 ngx_mail_imap_authenticate(ngx_mail_session_t *s, ngx_connection_t *c) |
420
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351 { |
1479 | 352 ngx_int_t rc; |
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353 ngx_mail_core_srv_conf_t *cscf; |
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354 ngx_mail_imap_srv_conf_t *iscf; |
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355 |
1479 | 356 #if (NGX_MAIL_SSL) |
357 if (ngx_mail_starttls_only(s, c)) { | |
358 return NGX_MAIL_PARSE_INVALID_COMMAND; | |
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359 } |
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360 #endif |
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361 |
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362 iscf = ngx_mail_get_module_srv_conf(s, ngx_mail_imap_module); |
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363 |
1479 | 364 rc = ngx_mail_auth_parse(s, c); |
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365 |
1479 | 366 switch (rc) { |
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367 |
1479 | 368 case NGX_MAIL_AUTH_LOGIN: |
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369 |
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370 ngx_str_set(&s->out, imap_username); |
1479 | 371 s->mail_state = ngx_imap_auth_login_username; |
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372 |
1479 | 373 return NGX_OK; |
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374 |
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375 case NGX_MAIL_AUTH_LOGIN_USERNAME: |
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376 |
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377 ngx_str_set(&s->out, imap_password); |
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378 s->mail_state = ngx_imap_auth_login_password; |
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379 |
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380 return ngx_mail_auth_login_username(s, c, 1); |
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381 |
1479 | 382 case NGX_MAIL_AUTH_PLAIN: |
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383 |
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384 ngx_str_set(&s->out, imap_plain_next); |
1479 | 385 s->mail_state = ngx_imap_auth_plain; |
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386 |
1479 | 387 return NGX_OK; |
388 | |
389 case NGX_MAIL_AUTH_CRAM_MD5: | |
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390 |
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391 if (!(iscf->auth_methods & NGX_MAIL_AUTH_CRAM_MD5_ENABLED)) { |
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392 return NGX_MAIL_PARSE_INVALID_COMMAND; |
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393 } |
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394 |
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395 if (s->salt.data == NULL) { |
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396 cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); |
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397 |
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398 if (ngx_mail_salt(s, c, cscf) != NGX_OK) { |
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399 return NGX_ERROR; |
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400 } |
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401 } |
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402 |
1479 | 403 if (ngx_mail_auth_cram_md5_salt(s, c, "+ ", 2) == NGX_OK) { |
404 s->mail_state = ngx_imap_auth_cram_md5; | |
405 return NGX_OK; | |
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406 } |
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407 |
1479 | 408 return NGX_ERROR; |
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Mail: support SASL EXTERNAL (RFC 4422).
Rob N ★ <robn@fastmail.com>
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409 |
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410 case NGX_MAIL_AUTH_EXTERNAL: |
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411 |
6869
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Mail: make it possible to disable SASL EXTERNAL.
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412 if (!(iscf->auth_methods & NGX_MAIL_AUTH_EXTERNAL_ENABLED)) { |
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413 return NGX_MAIL_PARSE_INVALID_COMMAND; |
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414 } |
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415 |
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416 ngx_str_set(&s->out, imap_username); |
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417 s->mail_state = ngx_imap_auth_external; |
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418 |
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419 return NGX_OK; |
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420 } |
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421 |
1479 | 422 return rc; |
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423 } |
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424 |
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425 |
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426 static ngx_int_t |
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427 ngx_mail_imap_capability(ngx_mail_session_t *s, ngx_connection_t *c) |
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428 { |
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429 ngx_mail_imap_srv_conf_t *iscf; |
420
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430 |
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431 iscf = ngx_mail_get_module_srv_conf(s, ngx_mail_imap_module); |
809 | 432 |
1322 | 433 #if (NGX_MAIL_SSL) |
434 | |
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435 if (c->ssl == NULL) { |
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436 ngx_mail_ssl_conf_t *sslcf; |
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437 |
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438 sslcf = ngx_mail_get_module_srv_conf(s, ngx_mail_ssl_module); |
809 | 439 |
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440 if (sslcf->starttls == NGX_MAIL_STARTTLS_ON) { |
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441 s->text = iscf->starttls_capability; |
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442 return NGX_OK; |
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443 } |
1136 | 444 |
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445 if (sslcf->starttls == NGX_MAIL_STARTTLS_ONLY) { |
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446 s->text = iscf->starttls_only_capability; |
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447 return NGX_OK; |
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448 } |
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449 } |
1322 | 450 #endif |
451 | |
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452 s->text = iscf->capability; |
894
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diff
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|
453 |
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454 return NGX_OK; |
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|
455 } |
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|
456 |
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|
457 |
521 | 458 static ngx_int_t |
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459 ngx_mail_imap_starttls(ngx_mail_session_t *s, ngx_connection_t *c) |
420
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460 { |
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461 #if (NGX_MAIL_SSL) |
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462 ngx_mail_ssl_conf_t *sslcf; |
1136 | 463 |
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464 if (c->ssl == NULL) { |
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465 sslcf = ngx_mail_get_module_srv_conf(s, ngx_mail_ssl_module); |
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466 if (sslcf->starttls) { |
7843
b38728495e1a
Mail: IMAP pipelining support.
Maxim Dounin <mdounin@mdounin.ru>
parents:
7841
diff
changeset
|
467 s->buffer->pos = s->buffer->start; |
b38728495e1a
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7841
diff
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|
468 s->buffer->last = s->buffer->start; |
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469 c->read->handler = ngx_mail_starttls_handler; |
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470 return NGX_OK; |
539 | 471 } |
472 } | |
473 | |
474 #endif | |
475 | |
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|
476 return NGX_MAIL_PARSE_INVALID_COMMAND; |
417
0526206251f6
nginx-0.0.10-2004-09-07-19:29:22 import
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415
diff
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|
477 } |