Mercurial > hg > nginx-quic
annotate src/mail/ngx_mail_imap_handler.c @ 8437:d5f93733c17d quic
QUIC: relaxed client id requirements.
Client IDs cannot be reused on different paths. This change allows to reuse
client id previosly seen on the same path (but with different dcid) in case
when no unused client IDs are available.
author | Vladimir Homutov <vl@nginx.com> |
---|---|
date | Wed, 05 May 2021 18:11:55 +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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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 } |
420
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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 |
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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; |
6774
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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 |
6869
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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 { |
1487
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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) { |
1704
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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) { |
1487
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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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diff
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|
470 |
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|
471 return NGX_OK; |
4f7dca9c37f0
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diff
changeset
|
472 } |
4f7dca9c37f0
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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
0526206251f6
nginx-0.0.10-2004-09-07-19:29:22 import
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415
diff
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492 } |