Mercurial > hg > nginx
annotate src/mail/ngx_mail_pop3_handler.c @ 8620:d10118e38943 quic
QUIC: refactored SSL_do_handshake() handling.
No functional changes.
author | Sergey Kandaurov <pluknet@nginx.com> |
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date | Thu, 29 Oct 2020 21:50:49 +0000 |
parents | b2915d99ee8d |
children | ab6257dac2a8 |
rev | line source |
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1 |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
4412 | 4 * Copyright (C) Nginx, Inc. |
441
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5 */ |
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8 #include <ngx_config.h> |
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9 #include <ngx_core.h> |
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10 #include <ngx_event.h> |
1136 | 11 #include <ngx_mail.h> |
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12 #include <ngx_mail_pop3_module.h> |
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13 |
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14 |
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15 static ngx_int_t ngx_mail_pop3_user(ngx_mail_session_t *s, ngx_connection_t *c); |
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16 static ngx_int_t ngx_mail_pop3_pass(ngx_mail_session_t *s, ngx_connection_t *c); |
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17 static ngx_int_t ngx_mail_pop3_capa(ngx_mail_session_t *s, ngx_connection_t *c, |
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18 ngx_int_t stls); |
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19 static ngx_int_t ngx_mail_pop3_stls(ngx_mail_session_t *s, ngx_connection_t *c); |
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20 static ngx_int_t ngx_mail_pop3_apop(ngx_mail_session_t *s, ngx_connection_t *c); |
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21 static ngx_int_t ngx_mail_pop3_auth(ngx_mail_session_t *s, ngx_connection_t *c); |
539 | 22 |
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23 |
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24 static u_char pop3_greeting[] = "+OK POP3 ready" CRLF; |
521 | 25 static u_char pop3_ok[] = "+OK" CRLF; |
809 | 26 static u_char pop3_next[] = "+ " CRLF; |
27 static u_char pop3_username[] = "+ VXNlcm5hbWU6" CRLF; | |
28 static u_char pop3_password[] = "+ UGFzc3dvcmQ6" CRLF; | |
521 | 29 static u_char pop3_invalid_command[] = "-ERR invalid command" CRLF; |
30 | |
31 | |
32 void | |
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33 ngx_mail_pop3_init_session(ngx_mail_session_t *s, ngx_connection_t *c) |
541 | 34 { |
800 | 35 u_char *p; |
1136 | 36 ngx_mail_core_srv_conf_t *cscf; |
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37 ngx_mail_pop3_srv_conf_t *pscf; |
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38 |
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39 pscf = ngx_mail_get_module_srv_conf(s, ngx_mail_pop3_module); |
1136 | 40 cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); |
539 | 41 |
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42 if (pscf->auth_methods |
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43 & (NGX_MAIL_AUTH_APOP_ENABLED|NGX_MAIL_AUTH_CRAM_MD5_ENABLED)) |
800 | 44 { |
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45 if (ngx_mail_salt(s, c, cscf) != NGX_OK) { |
1136 | 46 ngx_mail_session_internal_server_error(s); |
800 | 47 return; |
48 } | |
49 | |
2049 | 50 s->out.data = ngx_pnalloc(c->pool, sizeof(pop3_greeting) + s->salt.len); |
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51 if (s->out.data == NULL) { |
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52 ngx_mail_session_internal_server_error(s); |
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53 return; |
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54 } |
800 | 55 |
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56 p = ngx_cpymem(s->out.data, pop3_greeting, sizeof(pop3_greeting) - 3); |
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57 *p++ = ' '; |
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58 p = ngx_cpymem(p, s->salt.data, s->salt.len); |
800 | 59 |
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60 s->out.len = p - s->out.data; |
800 | 61 |
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62 } else { |
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63 ngx_str_set(&s->out, pop3_greeting); |
800 | 64 } |
65 | |
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66 c->read->handler = ngx_mail_pop3_init_protocol; |
539 | 67 |
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68 ngx_add_timer(c->read, cscf->timeout); |
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69 |
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70 if (ngx_handle_read_event(c->read, 0) != NGX_OK) { |
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71 ngx_mail_close_connection(c); |
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72 } |
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73 |
1136 | 74 ngx_mail_send(c->write); |
539 | 75 } |
76 | |
77 | |
78 void | |
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79 ngx_mail_pop3_init_protocol(ngx_event_t *rev) |
539 | 80 { |
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81 ngx_connection_t *c; |
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82 ngx_mail_session_t *s; |
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83 |
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84 c = rev->data; |
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85 |
541 | 86 c->log->action = "in auth state"; |
87 | |
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88 if (rev->timedout) { |
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89 ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, "client timed out"); |
577 | 90 c->timedout = 1; |
1136 | 91 ngx_mail_close_connection(c); |
423
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92 return; |
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93 } |
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94 |
539 | 95 s = c->data; |
521 | 96 |
419
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97 if (s->buffer == NULL) { |
583 | 98 if (ngx_array_init(&s->args, c->pool, 2, sizeof(ngx_str_t)) |
99 == NGX_ERROR) | |
100 { | |
1136 | 101 ngx_mail_session_internal_server_error(s); |
583 | 102 return; |
103 } | |
104 | |
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105 s->buffer = ngx_create_temp_buf(c->pool, 128); |
583 | 106 if (s->buffer == NULL) { |
1136 | 107 ngx_mail_session_internal_server_error(s); |
583 | 108 return; |
109 } | |
419
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110 } |
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111 |
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112 s->mail_state = ngx_pop3_start; |
1477 | 113 c->read->handler = ngx_mail_pop3_auth_state; |
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114 |
1477 | 115 ngx_mail_pop3_auth_state(rev); |
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116 } |
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117 |
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118 |
527 | 119 void |
1477 | 120 ngx_mail_pop3_auth_state(ngx_event_t *rev) |
521 | 121 { |
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122 ngx_int_t rc; |
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123 ngx_connection_t *c; |
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124 ngx_mail_session_t *s; |
521 | 125 |
126 c = rev->data; | |
527 | 127 s = c->data; |
521 | 128 |
1136 | 129 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, c->log, 0, "pop3 auth state"); |
527 | 130 |
131 if (rev->timedout) { | |
132 ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, "client timed out"); | |
577 | 133 c->timedout = 1; |
1136 | 134 ngx_mail_close_connection(c); |
527 | 135 return; |
136 } | |
137 | |
539 | 138 if (s->out.len) { |
1136 | 139 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, c->log, 0, "pop3 send handler busy"); |
539 | 140 s->blocked = 1; |
141 return; | |
142 } | |
143 | |
144 s->blocked = 0; | |
145 | |
1482 | 146 rc = ngx_mail_read_command(s, c); |
1136 | 147 |
148 if (rc == NGX_AGAIN || rc == NGX_ERROR) { | |
149 return; | |
150 } | |
151 | |
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152 ngx_str_set(&s->out, pop3_ok); |
1136 | 153 |
154 if (rc == NGX_OK) { | |
155 switch (s->mail_state) { | |
156 | |
157 case ngx_pop3_start: | |
158 | |
159 switch (s->command) { | |
160 | |
161 case NGX_POP3_USER: | |
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162 rc = ngx_mail_pop3_user(s, c); |
1136 | 163 break; |
164 | |
165 case NGX_POP3_CAPA: | |
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166 rc = ngx_mail_pop3_capa(s, c, 1); |
1136 | 167 break; |
168 | |
169 case NGX_POP3_APOP: | |
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170 rc = ngx_mail_pop3_apop(s, c); |
1136 | 171 break; |
172 | |
173 case NGX_POP3_AUTH: | |
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174 rc = ngx_mail_pop3_auth(s, c); |
1136 | 175 break; |
176 | |
177 case NGX_POP3_QUIT: | |
178 s->quit = 1; | |
179 break; | |
180 | |
181 case NGX_POP3_NOOP: | |
182 break; | |
183 | |
184 case NGX_POP3_STLS: | |
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185 rc = ngx_mail_pop3_stls(s, c); |
1136 | 186 break; |
187 | |
188 default: | |
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189 rc = NGX_MAIL_PARSE_INVALID_COMMAND; |
1136 | 190 break; |
191 } | |
192 | |
193 break; | |
194 | |
195 case ngx_pop3_user: | |
196 | |
197 switch (s->command) { | |
198 | |
199 case NGX_POP3_PASS: | |
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200 rc = ngx_mail_pop3_pass(s, c); |
1136 | 201 break; |
202 | |
203 case NGX_POP3_CAPA: | |
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204 rc = ngx_mail_pop3_capa(s, c, 0); |
1136 | 205 break; |
206 | |
207 case NGX_POP3_QUIT: | |
208 s->quit = 1; | |
209 break; | |
210 | |
211 case NGX_POP3_NOOP: | |
212 break; | |
213 | |
214 default: | |
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215 rc = NGX_MAIL_PARSE_INVALID_COMMAND; |
1136 | 216 break; |
217 } | |
218 | |
219 break; | |
220 | |
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221 /* suppress warnings */ |
1136 | 222 case ngx_pop3_passwd: |
223 break; | |
224 | |
225 case ngx_pop3_auth_login_username: | |
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226 rc = ngx_mail_auth_login_username(s, c, 0); |
1136 | 227 |
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228 ngx_str_set(&s->out, pop3_password); |
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229 s->mail_state = ngx_pop3_auth_login_password; |
1136 | 230 break; |
231 | |
232 case ngx_pop3_auth_login_password: | |
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233 rc = ngx_mail_auth_login_password(s, c); |
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234 break; |
1136 | 235 |
236 case ngx_pop3_auth_plain: | |
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237 rc = ngx_mail_auth_plain(s, c, 0); |
1136 | 238 break; |
239 | |
240 case ngx_pop3_auth_cram_md5: | |
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241 rc = ngx_mail_auth_cram_md5(s, c); |
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242 break; |
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243 |
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244 case ngx_pop3_auth_external: |
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245 rc = ngx_mail_auth_external(s, c, 0); |
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246 break; |
1136 | 247 } |
248 } | |
249 | |
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250 switch (rc) { |
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251 |
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252 case NGX_DONE: |
1482 | 253 ngx_mail_auth(s, c); |
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254 return; |
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255 |
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256 case NGX_ERROR: |
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257 ngx_mail_session_internal_server_error(s); |
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258 return; |
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259 |
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260 case NGX_MAIL_PARSE_INVALID_COMMAND: |
1136 | 261 s->mail_state = ngx_pop3_start; |
262 s->state = 0; | |
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263 |
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264 ngx_str_set(&s->out, pop3_invalid_command); |
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265 |
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266 /* fall through */ |
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267 |
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268 case NGX_OK: |
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269 |
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270 s->args.nelts = 0; |
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271 s->buffer->pos = s->buffer->start; |
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272 s->buffer->last = s->buffer->start; |
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273 |
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274 if (s->state) { |
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275 s->arg_start = s->buffer->start; |
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276 } |
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277 |
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278 ngx_mail_send(c->write); |
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279 } |
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280 } |
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281 |
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282 static ngx_int_t |
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283 ngx_mail_pop3_user(ngx_mail_session_t *s, ngx_connection_t *c) |
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284 { |
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285 ngx_str_t *arg; |
1479 | 286 |
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287 #if (NGX_MAIL_SSL) |
1479 | 288 if (ngx_mail_starttls_only(s, c)) { |
289 return NGX_MAIL_PARSE_INVALID_COMMAND; | |
1136 | 290 } |
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291 #endif |
1136 | 292 |
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293 if (s->args.nelts != 1) { |
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294 return NGX_MAIL_PARSE_INVALID_COMMAND; |
1136 | 295 } |
296 | |
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297 arg = s->args.elts; |
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298 s->login.len = arg[0].len; |
2049 | 299 s->login.data = ngx_pnalloc(c->pool, s->login.len); |
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300 if (s->login.data == NULL) { |
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301 return NGX_ERROR; |
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302 } |
1136 | 303 |
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304 ngx_memcpy(s->login.data, arg[0].data, s->login.len); |
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305 |
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306 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, |
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307 "pop3 login: \"%V\"", &s->login); |
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308 |
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309 s->mail_state = ngx_pop3_user; |
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310 |
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311 return NGX_OK; |
1136 | 312 } |
313 | |
314 | |
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315 static ngx_int_t |
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316 ngx_mail_pop3_pass(ngx_mail_session_t *s, ngx_connection_t *c) |
1136 | 317 { |
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318 ngx_str_t *arg; |
1136 | 319 |
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320 if (s->args.nelts != 1) { |
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321 return NGX_MAIL_PARSE_INVALID_COMMAND; |
527 | 322 } |
323 | |
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324 arg = s->args.elts; |
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325 s->passwd.len = arg[0].len; |
2049 | 326 s->passwd.data = ngx_pnalloc(c->pool, s->passwd.len); |
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327 if (s->passwd.data == NULL) { |
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328 return NGX_ERROR; |
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329 } |
1323 | 330 |
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331 ngx_memcpy(s->passwd.data, arg[0].data, s->passwd.len); |
1323 | 332 |
333 #if (NGX_DEBUG_MAIL_PASSWD) | |
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334 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, |
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335 "pop3 passwd: \"%V\"", &s->passwd); |
1323 | 336 #endif |
337 | |
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338 return NGX_DONE; |
521 | 339 } |
340 | |
341 | |
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342 static ngx_int_t |
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343 ngx_mail_pop3_capa(ngx_mail_session_t *s, ngx_connection_t *c, ngx_int_t stls) |
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344 { |
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345 ngx_mail_pop3_srv_conf_t *pscf; |
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346 |
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347 pscf = ngx_mail_get_module_srv_conf(s, ngx_mail_pop3_module); |
809 | 348 |
1322 | 349 #if (NGX_MAIL_SSL) |
350 | |
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351 if (stls && c->ssl == NULL) { |
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352 ngx_mail_ssl_conf_t *sslcf; |
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353 |
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354 sslcf = ngx_mail_get_module_srv_conf(s, ngx_mail_ssl_module); |
1322 | 355 |
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356 if (sslcf->starttls == NGX_MAIL_STARTTLS_ON) { |
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357 s->out = pscf->starttls_capability; |
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358 return NGX_OK; |
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359 } |
809 | 360 |
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361 if (sslcf->starttls == NGX_MAIL_STARTTLS_ONLY) { |
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362 s->out = pscf->starttls_only_capability; |
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363 return NGX_OK; |
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364 } |
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365 } |
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366 |
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367 #endif |
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368 |
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369 s->out = pscf->capability; |
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370 return NGX_OK; |
417
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371 } |
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372 |
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373 |
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374 static ngx_int_t |
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375 ngx_mail_pop3_stls(ngx_mail_session_t *s, ngx_connection_t *c) |
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376 { |
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377 #if (NGX_MAIL_SSL) |
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378 ngx_mail_ssl_conf_t *sslcf; |
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379 |
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380 if (c->ssl == NULL) { |
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381 sslcf = ngx_mail_get_module_srv_conf(s, ngx_mail_ssl_module); |
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382 if (sslcf->starttls) { |
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383 c->read->handler = ngx_mail_starttls_handler; |
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384 return NGX_OK; |
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385 } |
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386 } |
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387 |
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388 #endif |
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389 |
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390 return NGX_MAIL_PARSE_INVALID_COMMAND; |
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391 } |
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392 |
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393 |
521 | 394 static ngx_int_t |
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395 ngx_mail_pop3_apop(ngx_mail_session_t *s, ngx_connection_t *c) |
420
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396 { |
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397 ngx_str_t *arg; |
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398 ngx_mail_pop3_srv_conf_t *pscf; |
1479 | 399 |
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400 #if (NGX_MAIL_SSL) |
1479 | 401 if (ngx_mail_starttls_only(s, c)) { |
402 return NGX_MAIL_PARSE_INVALID_COMMAND; | |
539 | 403 } |
404 #endif | |
405 | |
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406 if (s->args.nelts != 2) { |
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407 return NGX_MAIL_PARSE_INVALID_COMMAND; |
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408 } |
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409 |
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410 pscf = ngx_mail_get_module_srv_conf(s, ngx_mail_pop3_module); |
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411 |
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412 if (!(pscf->auth_methods & NGX_MAIL_AUTH_APOP_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 arg = s->args.elts; |
543 | 417 |
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418 s->login.len = arg[0].len; |
2049 | 419 s->login.data = ngx_pnalloc(c->pool, s->login.len); |
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420 if (s->login.data == NULL) { |
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421 return NGX_ERROR; |
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422 } |
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423 |
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424 ngx_memcpy(s->login.data, arg[0].data, s->login.len); |
479 | 425 |
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426 s->passwd.len = arg[1].len; |
2049 | 427 s->passwd.data = ngx_pnalloc(c->pool, s->passwd.len); |
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428 if (s->passwd.data == NULL) { |
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429 return NGX_ERROR; |
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430 } |
479 | 431 |
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432 ngx_memcpy(s->passwd.data, arg[1].data, s->passwd.len); |
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433 |
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434 ngx_log_debug2(NGX_LOG_DEBUG_MAIL, c->log, 0, |
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435 "pop3 apop: \"%V\" \"%V\"", &s->login, &s->passwd); |
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436 |
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437 s->auth_method = NGX_MAIL_AUTH_APOP; |
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438 |
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439 return NGX_DONE; |
417
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440 } |
539 | 441 |
442 | |
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443 static ngx_int_t |
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444 ngx_mail_pop3_auth(ngx_mail_session_t *s, ngx_connection_t *c) |
541 | 445 { |
1479 | 446 ngx_int_t rc; |
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447 ngx_mail_pop3_srv_conf_t *pscf; |
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448 |
1479 | 449 #if (NGX_MAIL_SSL) |
450 if (ngx_mail_starttls_only(s, c)) { | |
451 return NGX_MAIL_PARSE_INVALID_COMMAND; | |
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452 } |
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453 #endif |
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454 |
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455 pscf = ngx_mail_get_module_srv_conf(s, ngx_mail_pop3_module); |
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456 |
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457 if (s->args.nelts == 0) { |
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458 s->out = pscf->auth_capability; |
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459 s->state = 0; |
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460 |
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461 return NGX_OK; |
541 | 462 } |
577 | 463 |
1479 | 464 rc = ngx_mail_auth_parse(s, c); |
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465 |
1479 | 466 switch (rc) { |
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467 |
1479 | 468 case NGX_MAIL_AUTH_LOGIN: |
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469 |
3516
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470 ngx_str_set(&s->out, pop3_username); |
1479 | 471 s->mail_state = ngx_pop3_auth_login_username; |
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472 |
1479 | 473 return NGX_OK; |
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474 |
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475 case NGX_MAIL_AUTH_LOGIN_USERNAME: |
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476 |
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477 ngx_str_set(&s->out, pop3_password); |
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478 s->mail_state = ngx_pop3_auth_login_password; |
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479 |
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480 return ngx_mail_auth_login_username(s, c, 1); |
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481 |
1479 | 482 case NGX_MAIL_AUTH_PLAIN: |
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483 |
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|
484 ngx_str_set(&s->out, pop3_next); |
1479 | 485 s->mail_state = ngx_pop3_auth_plain; |
541 | 486 |
1479 | 487 return NGX_OK; |
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488 |
1479 | 489 case NGX_MAIL_AUTH_CRAM_MD5: |
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490 |
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491 if (!(pscf->auth_methods & NGX_MAIL_AUTH_CRAM_MD5_ENABLED)) { |
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492 return NGX_MAIL_PARSE_INVALID_COMMAND; |
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493 } |
541 | 494 |
1479 | 495 if (ngx_mail_auth_cram_md5_salt(s, c, "+ ", 2) == NGX_OK) { |
496 s->mail_state = ngx_pop3_auth_cram_md5; | |
497 return NGX_OK; | |
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498 } |
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499 |
1479 | 500 return NGX_ERROR; |
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|
501 |
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|
502 case NGX_MAIL_AUTH_EXTERNAL: |
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|
503 |
6869
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|
504 if (!(pscf->auth_methods & NGX_MAIL_AUTH_EXTERNAL_ENABLED)) { |
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505 return NGX_MAIL_PARSE_INVALID_COMMAND; |
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506 } |
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|
507 |
6774
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diff
changeset
|
508 ngx_str_set(&s->out, pop3_username); |
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|
509 s->mail_state = ngx_pop3_auth_external; |
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|
510 |
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|
511 return NGX_OK; |
541 | 512 } |
513 | |
1479 | 514 return rc; |
541 | 515 } |