Mercurial > hg > nginx
annotate src/mail/ngx_mail_parse.c @ 1405:fdd064faf26a
escape " ", "%", and %00-%1F in login and password
| author | Igor Sysoev <igor@sysoev.ru> |
|---|---|
| date | Mon, 20 Aug 2007 09:50:53 +0000 |
| parents | c4b2c893989d |
| children | 59e1caf2be94 ed9cd1702f7a |
| rev | line source |
|---|---|
|
441
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nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
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1 |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
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441
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4 */ |
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5 |
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6 |
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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 |
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12 |
| 1136 | 13 ngx_int_t ngx_pop3_parse_command(ngx_mail_session_t *s) |
| 14 { | |
| 15 u_char ch, *p, *c, c0, c1, c2, c3; | |
| 16 ngx_str_t *arg; | |
| 17 enum { | |
| 18 sw_start = 0, | |
| 19 sw_spaces_before_argument, | |
| 20 sw_argument, | |
| 21 sw_almost_done | |
| 22 } state; | |
| 23 | |
| 24 state = s->state; | |
| 25 | |
| 26 for (p = s->buffer->pos; p < s->buffer->last; p++) { | |
| 27 ch = *p; | |
| 28 | |
| 29 switch (state) { | |
| 30 | |
| 31 /* POP3 command */ | |
| 32 case sw_start: | |
| 33 if (ch == ' ' || ch == CR || ch == LF) { | |
| 34 c = s->buffer->start; | |
| 35 | |
| 36 if (p - c == 4) { | |
| 37 | |
| 38 c0 = ngx_toupper(c[0]); | |
| 39 c1 = ngx_toupper(c[1]); | |
| 40 c2 = ngx_toupper(c[2]); | |
| 41 c3 = ngx_toupper(c[3]); | |
| 42 | |
| 43 if (c0 == 'U' && c1 == 'S' && c2 == 'E' && c3 == 'R') | |
| 44 { | |
| 45 s->command = NGX_POP3_USER; | |
| 46 | |
| 47 } else if (c0 == 'P' && c1 == 'A' && c2 == 'S' && c3 == 'S') | |
| 48 { | |
| 49 s->command = NGX_POP3_PASS; | |
| 50 | |
| 51 } else if (c0 == 'A' && c1 == 'P' && c2 == 'O' && c3 == 'P') | |
| 52 { | |
| 53 s->command = NGX_POP3_APOP; | |
| 54 | |
| 55 } else if (c0 == 'Q' && c1 == 'U' && c2 == 'I' && c3 == 'T') | |
| 56 { | |
| 57 s->command = NGX_POP3_QUIT; | |
| 58 | |
| 59 } else if (c0 == 'C' && c1 == 'A' && c2 == 'P' && c3 == 'A') | |
| 60 { | |
| 61 s->command = NGX_POP3_CAPA; | |
| 62 | |
| 63 } else if (c0 == 'A' && c1 == 'U' && c2 == 'T' && c3 == 'H') | |
| 64 { | |
| 65 s->command = NGX_POP3_AUTH; | |
| 66 | |
| 67 } else if (c0 == 'N' && c1 == 'O' && c2 == 'O' && c3 == 'P') | |
| 68 { | |
| 69 s->command = NGX_POP3_NOOP; | |
| 70 #if (NGX_MAIL_SSL) | |
| 71 } else if (c0 == 'S' && c1 == 'T' && c2 == 'L' && c3 == 'S') | |
| 72 { | |
| 73 s->command = NGX_POP3_STLS; | |
| 74 #endif | |
| 75 } else { | |
| 76 goto invalid; | |
| 77 } | |
| 78 | |
| 79 } else { | |
| 80 goto invalid; | |
| 81 } | |
| 82 | |
| 83 switch (ch) { | |
| 84 case ' ': | |
| 85 state = sw_spaces_before_argument; | |
| 86 break; | |
| 87 case CR: | |
| 88 state = sw_almost_done; | |
| 89 break; | |
| 90 case LF: | |
| 91 goto done; | |
| 92 } | |
| 93 break; | |
| 94 } | |
| 95 | |
| 96 if ((ch < 'A' || ch > 'Z') && (ch < 'a' || ch > 'z')) { | |
| 97 goto invalid; | |
| 98 } | |
| 99 | |
| 100 break; | |
| 101 | |
| 102 case sw_spaces_before_argument: | |
| 103 switch (ch) { | |
| 104 case ' ': | |
| 105 break; | |
| 106 case CR: | |
| 107 state = sw_almost_done; | |
| 108 s->arg_end = p; | |
| 109 break; | |
| 110 case LF: | |
| 111 s->arg_end = p; | |
| 112 goto done; | |
| 113 default: | |
| 114 if (s->args.nelts <= 2) { | |
| 115 state = sw_argument; | |
| 116 s->arg_start = p; | |
| 117 break; | |
| 118 } | |
| 119 goto invalid; | |
| 120 } | |
| 121 break; | |
| 122 | |
| 123 case sw_argument: | |
| 124 switch (ch) { | |
| 125 | |
| 126 case ' ': | |
| 127 | |
| 128 /* | |
| 129 * the space should be considered as part of the at username | |
| 130 * or password, but not of argument in other commands | |
| 131 */ | |
| 132 | |
| 133 if (s->command == NGX_POP3_USER | |
| 134 || s->command == NGX_POP3_PASS) | |
| 135 { | |
| 136 break; | |
| 137 } | |
| 138 | |
| 139 /* fall through */ | |
| 140 | |
| 141 case CR: | |
| 142 case LF: | |
| 143 arg = ngx_array_push(&s->args); | |
| 144 if (arg == NULL) { | |
| 145 return NGX_ERROR; | |
| 146 } | |
| 147 arg->len = p - s->arg_start; | |
| 148 arg->data = s->arg_start; | |
| 149 s->arg_start = NULL; | |
| 150 | |
| 151 switch (ch) { | |
| 152 case ' ': | |
| 153 state = sw_spaces_before_argument; | |
| 154 break; | |
| 155 case CR: | |
| 156 state = sw_almost_done; | |
| 157 break; | |
| 158 case LF: | |
| 159 goto done; | |
| 160 } | |
| 161 break; | |
| 162 | |
| 163 default: | |
| 164 break; | |
| 165 } | |
| 166 break; | |
| 167 | |
| 168 case sw_almost_done: | |
| 169 switch (ch) { | |
| 170 case LF: | |
| 171 goto done; | |
| 172 default: | |
| 173 goto invalid; | |
| 174 } | |
| 175 } | |
| 176 } | |
| 177 | |
| 178 s->buffer->pos = p; | |
| 179 s->state = state; | |
| 180 | |
| 181 return NGX_AGAIN; | |
| 182 | |
| 183 done: | |
| 184 | |
| 185 s->buffer->pos = p + 1; | |
| 186 | |
| 187 if (s->arg_start) { | |
| 188 arg = ngx_array_push(&s->args); | |
| 189 if (arg == NULL) { | |
| 190 return NGX_ERROR; | |
| 191 } | |
| 192 arg->len = s->arg_end - s->arg_start; | |
| 193 arg->data = s->arg_start; | |
| 194 s->arg_start = NULL; | |
| 195 } | |
| 196 | |
| 197 s->state = (s->command != NGX_POP3_AUTH) ? sw_start : sw_argument; | |
| 198 | |
| 199 return NGX_OK; | |
| 200 | |
| 201 invalid: | |
| 202 | |
| 203 s->state = sw_start; | |
| 204 s->arg_start = NULL; | |
| 205 | |
| 206 return NGX_MAIL_PARSE_INVALID_COMMAND; | |
| 207 } | |
| 208 | |
| 209 | |
| 210 ngx_int_t ngx_imap_parse_command(ngx_mail_session_t *s) | |
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211 { |
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212 u_char ch, *p, *c; |
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213 ngx_str_t *arg; |
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214 enum { |
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215 sw_start = 0, |
| 527 | 216 sw_spaces_before_command, |
| 217 sw_command, | |
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218 sw_spaces_before_argument, |
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219 sw_argument, |
| 543 | 220 sw_backslash, |
| 527 | 221 sw_literal, |
| 543 | 222 sw_no_sync_literal_argument, |
| 527 | 223 sw_start_literal_argument, |
| 224 sw_literal_argument, | |
| 225 sw_end_literal_argument, | |
| 226 sw_almost_done | |
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227 } state; |
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228 |
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229 state = s->state; |
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230 |
| 527 | 231 for (p = s->buffer->pos; p < s->buffer->last; p++) { |
| 232 ch = *p; | |
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233 |
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234 switch (state) { |
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235 |
| 527 | 236 /* IMAP tag */ |
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237 case sw_start: |
| 527 | 238 switch (ch) { |
| 239 case ' ': | |
| 240 s->tag.len = p - s->buffer->start + 1; | |
| 241 s->tag.data = s->buffer->start; | |
| 242 state = sw_spaces_before_command; | |
| 243 break; | |
| 244 case CR: | |
| 245 s->state = sw_start; | |
| 1136 | 246 return NGX_MAIL_PARSE_INVALID_COMMAND; |
| 527 | 247 case LF: |
| 248 s->state = sw_start; | |
| 1136 | 249 return NGX_MAIL_PARSE_INVALID_COMMAND; |
| 527 | 250 } |
| 251 break; | |
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252 |
| 527 | 253 case sw_spaces_before_command: |
| 254 switch (ch) { | |
| 255 case ' ': | |
| 256 break; | |
| 257 case CR: | |
| 258 s->state = sw_start; | |
| 1136 | 259 return NGX_MAIL_PARSE_INVALID_COMMAND; |
| 527 | 260 case LF: |
| 261 s->state = sw_start; | |
| 1136 | 262 return NGX_MAIL_PARSE_INVALID_COMMAND; |
| 527 | 263 default: |
| 264 s->cmd_start = p; | |
| 265 state = sw_command; | |
| 266 break; | |
| 267 } | |
| 268 break; | |
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269 |
| 527 | 270 case sw_command: |
| 271 if (ch == ' ' || ch == CR || ch == LF) { | |
| 272 | |
| 273 c = s->cmd_start; | |
| 274 | |
| 275 switch (p - c) { | |
| 276 | |
| 277 case 4: | |
| 278 if ((c[0] == 'N' || c[0] == 'n') | |
| 279 && (c[1] == 'O'|| c[1] == 'o') | |
| 280 && (c[2] == 'O'|| c[2] == 'o') | |
| 281 && (c[3] == 'P'|| c[3] == 'p')) | |
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282 { |
| 527 | 283 s->command = NGX_IMAP_NOOP; |
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284 |
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285 } else { |
| 527 | 286 goto invalid; |
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287 } |
| 527 | 288 break; |
| 289 | |
| 290 case 5: | |
| 291 if ((c[0] == 'L'|| c[0] == 'l') | |
| 292 && (c[1] == 'O'|| c[1] == 'o') | |
| 293 && (c[2] == 'G'|| c[2] == 'g') | |
| 294 && (c[3] == 'I'|| c[3] == 'i') | |
| 295 && (c[4] == 'N'|| c[4] == 'n')) | |
| 296 { | |
| 297 s->command = NGX_IMAP_LOGIN; | |
| 298 | |
| 299 } else { | |
| 300 goto invalid; | |
| 301 } | |
| 302 break; | |
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303 |
| 527 | 304 case 6: |
| 305 if ((c[0] == 'L'|| c[0] == 'l') | |
| 306 && (c[1] == 'O'|| c[1] == 'o') | |
| 307 && (c[2] == 'G'|| c[2] == 'g') | |
| 308 && (c[3] == 'O'|| c[3] == 'o') | |
| 309 && (c[4] == 'U'|| c[4] == 'u') | |
| 310 && (c[5] == 'T'|| c[5] == 't')) | |
| 311 { | |
| 312 s->command = NGX_IMAP_LOGOUT; | |
| 313 | |
| 314 } else { | |
| 315 goto invalid; | |
| 316 } | |
| 317 break; | |
| 318 | |
| 1136 | 319 #if (NGX_MAIL_SSL) |
| 583 | 320 case 8: |
| 321 if ((c[0] == 'S'|| c[0] == 's') | |
| 322 && (c[1] == 'T'|| c[1] == 't') | |
| 323 && (c[2] == 'A'|| c[2] == 'a') | |
| 324 && (c[3] == 'R'|| c[3] == 'r') | |
| 325 && (c[4] == 'T'|| c[4] == 't') | |
| 326 && (c[5] == 'T'|| c[5] == 't') | |
| 327 && (c[6] == 'L'|| c[6] == 'l') | |
| 328 && (c[7] == 'S'|| c[7] == 's')) | |
| 329 { | |
| 330 s->command = NGX_IMAP_STARTTLS; | |
| 331 | |
| 332 } else { | |
| 333 goto invalid; | |
| 334 } | |
| 335 break; | |
| 336 #endif | |
| 337 | |
| 527 | 338 case 10: |
| 339 if ((c[0] == 'C'|| c[0] == 'c') | |
| 340 && (c[1] == 'A'|| c[1] == 'a') | |
| 341 && (c[2] == 'P'|| c[2] == 'p') | |
| 342 && (c[3] == 'A'|| c[3] == 'a') | |
| 343 && (c[4] == 'B'|| c[4] == 'b') | |
| 344 && (c[5] == 'I'|| c[5] == 'i') | |
| 345 && (c[6] == 'L'|| c[6] == 'l') | |
| 346 && (c[7] == 'I'|| c[7] == 'i') | |
| 347 && (c[8] == 'T'|| c[8] == 't') | |
| 348 && (c[9] == 'Y'|| c[9] == 'y')) | |
| 349 { | |
| 350 s->command = NGX_IMAP_CAPABILITY; | |
| 351 | |
| 352 } else { | |
| 353 goto invalid; | |
| 354 } | |
| 355 break; | |
| 356 | |
| 1323 | 357 case 12: |
| 358 if ((c[0] == 'A'|| c[0] == 'a') | |
| 359 && (c[1] == 'U'|| c[1] == 'u') | |
| 360 && (c[2] == 'T'|| c[2] == 't') | |
| 361 && (c[3] == 'H'|| c[3] == 'h') | |
| 362 && (c[4] == 'E'|| c[4] == 'e') | |
| 363 && (c[5] == 'N'|| c[5] == 'n') | |
| 364 && (c[6] == 'T'|| c[6] == 't') | |
| 365 && (c[7] == 'I'|| c[7] == 'i') | |
| 366 && (c[8] == 'C'|| c[8] == 'c') | |
| 367 && (c[9] == 'A'|| c[9] == 'a') | |
| 368 && (c[10] == 'T'|| c[10] == 't') | |
| 369 && (c[11] == 'E'|| c[11] == 'e')) | |
| 370 { | |
| 371 s->command = NGX_IMAP_AUTHENTICATE; | |
| 372 | |
| 373 } else { | |
| 374 goto invalid; | |
| 375 } | |
| 376 break; | |
| 377 | |
| 527 | 378 default: |
| 379 goto invalid; | |
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380 } |
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381 |
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382 switch (ch) { |
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383 case ' ': |
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384 state = sw_spaces_before_argument; |
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385 break; |
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386 case CR: |
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387 state = sw_almost_done; |
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388 break; |
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389 case LF: |
| 527 | 390 goto done; |
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391 } |
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417
0526206251f6
nginx-0.0.10-2004-09-07-19:29:22 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
392 break; |
|
0526206251f6
nginx-0.0.10-2004-09-07-19:29:22 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
393 } |
|
0526206251f6
nginx-0.0.10-2004-09-07-19:29:22 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
394 |
| 527 | 395 if ((ch < 'A' || ch > 'Z') && (ch < 'a' || ch > 'z')) { |
| 396 goto invalid; | |
|
417
0526206251f6
nginx-0.0.10-2004-09-07-19:29:22 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
397 } |
|
0526206251f6
nginx-0.0.10-2004-09-07-19:29:22 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
398 |
|
0526206251f6
nginx-0.0.10-2004-09-07-19:29:22 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
399 break; |
|
419
47709bff4468
nginx-0.0.10-2004-09-09-19:40:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
417
diff
changeset
|
400 |
|
47709bff4468
nginx-0.0.10-2004-09-09-19:40:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
417
diff
changeset
|
401 case sw_spaces_before_argument: |
|
47709bff4468
nginx-0.0.10-2004-09-09-19:40:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
417
diff
changeset
|
402 switch (ch) { |
|
47709bff4468
nginx-0.0.10-2004-09-09-19:40:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
417
diff
changeset
|
403 case ' ': |
|
47709bff4468
nginx-0.0.10-2004-09-09-19:40:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
417
diff
changeset
|
404 break; |
|
47709bff4468
nginx-0.0.10-2004-09-09-19:40:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
417
diff
changeset
|
405 case CR: |
|
47709bff4468
nginx-0.0.10-2004-09-09-19:40:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
417
diff
changeset
|
406 state = sw_almost_done; |
| 527 | 407 s->arg_end = p; |
|
419
47709bff4468
nginx-0.0.10-2004-09-09-19:40:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
417
diff
changeset
|
408 break; |
|
47709bff4468
nginx-0.0.10-2004-09-09-19:40:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
417
diff
changeset
|
409 case LF: |
| 527 | 410 s->arg_end = p; |
| 411 goto done; | |
| 412 case '"': | |
| 413 if (s->args.nelts <= 2) { | |
| 414 s->quoted = 1; | |
| 415 s->arg_start = p + 1; | |
| 416 state = sw_argument; | |
| 417 break; | |
| 418 } | |
| 419 goto invalid; | |
| 420 case '{': | |
| 421 if (s->args.nelts <= 2) { | |
| 422 state = sw_literal; | |
| 423 break; | |
| 424 } | |
| 425 goto invalid; | |
|
419
47709bff4468
nginx-0.0.10-2004-09-09-19:40:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
417
diff
changeset
|
426 default: |
| 527 | 427 if (s->args.nelts <= 2) { |
| 428 s->arg_start = p; | |
| 429 state = sw_argument; | |
| 430 break; | |
| 431 } | |
| 432 goto invalid; | |
| 433 } | |
| 434 break; | |
| 435 | |
| 436 case sw_argument: | |
|
1405
fdd064faf26a
escape " ", "%", and %00-%1F in login and password
Igor Sysoev <igor@sysoev.ru>
parents:
1323
diff
changeset
|
437 if (ch == ' ' && s->quoted) { |
|
fdd064faf26a
escape " ", "%", and %00-%1F in login and password
Igor Sysoev <igor@sysoev.ru>
parents:
1323
diff
changeset
|
438 break; |
|
fdd064faf26a
escape " ", "%", and %00-%1F in login and password
Igor Sysoev <igor@sysoev.ru>
parents:
1323
diff
changeset
|
439 } |
|
fdd064faf26a
escape " ", "%", and %00-%1F in login and password
Igor Sysoev <igor@sysoev.ru>
parents:
1323
diff
changeset
|
440 |
| 527 | 441 switch (ch) { |
| 442 case '"': | |
| 443 if (!s->quoted) { | |
| 444 break; | |
|
419
47709bff4468
nginx-0.0.10-2004-09-09-19:40:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
417
diff
changeset
|
445 } |
| 527 | 446 s->quoted = 0; |
| 447 /* fall through */ | |
| 448 case ' ': | |
| 449 case CR: | |
| 450 case LF: | |
| 451 arg = ngx_array_push(&s->args); | |
| 452 if (arg == NULL) { | |
| 453 return NGX_ERROR; | |
| 454 } | |
| 455 arg->len = p - s->arg_start; | |
| 456 arg->data = s->arg_start; | |
| 457 s->arg_start = NULL; | |
|
419
47709bff4468
nginx-0.0.10-2004-09-09-19:40:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
417
diff
changeset
|
458 |
| 527 | 459 switch (ch) { |
| 460 case '"': | |
| 461 case ' ': | |
| 462 state = sw_spaces_before_argument; | |
| 463 break; | |
| 464 case CR: | |
| 465 state = sw_almost_done; | |
| 466 break; | |
| 467 case LF: | |
| 468 goto done; | |
| 469 } | |
|
419
47709bff4468
nginx-0.0.10-2004-09-09-19:40:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
417
diff
changeset
|
470 break; |
| 543 | 471 case '\\': |
| 472 if (s->quoted) { | |
| 473 s->backslash = 1; | |
| 474 state = sw_backslash; | |
| 475 } | |
| 476 break; | |
| 477 } | |
| 478 break; | |
| 479 | |
| 480 case sw_backslash: | |
| 481 switch (ch) { | |
| 482 case CR: | |
| 483 case LF: | |
| 484 goto invalid; | |
| 485 default: | |
| 486 state = sw_argument; | |
|
419
47709bff4468
nginx-0.0.10-2004-09-09-19:40:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
417
diff
changeset
|
487 } |
|
47709bff4468
nginx-0.0.10-2004-09-09-19:40:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
417
diff
changeset
|
488 break; |
|
47709bff4468
nginx-0.0.10-2004-09-09-19:40:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
417
diff
changeset
|
489 |
| 527 | 490 case sw_literal: |
| 491 if (ch >= '0' && ch <= '9') { | |
| 492 s->literal_len = s->literal_len * 10 + (ch - '0'); | |
| 493 break; | |
| 494 } | |
| 495 if (ch == '}') { | |
| 496 state = sw_start_literal_argument; | |
| 497 break; | |
| 498 } | |
| 543 | 499 if (ch == '+') { |
| 500 state = sw_no_sync_literal_argument; | |
| 501 break; | |
| 502 } | |
| 503 goto invalid; | |
| 504 | |
| 505 case sw_no_sync_literal_argument: | |
| 506 if (ch == '}') { | |
| 507 s->no_sync_literal = 1; | |
| 508 state = sw_start_literal_argument; | |
| 509 break; | |
| 510 } | |
| 527 | 511 goto invalid; |
| 512 | |
| 513 case sw_start_literal_argument: | |
| 514 switch (ch) { | |
| 515 case CR: | |
| 516 break; | |
| 517 case LF: | |
| 518 s->buffer->pos = p + 1; | |
| 519 s->arg_start = p + 1; | |
| 543 | 520 if (s->no_sync_literal == 0) { |
| 521 s->state = sw_literal_argument; | |
| 522 return NGX_IMAP_NEXT; | |
| 523 } | |
| 524 state = sw_literal_argument; | |
| 525 s->no_sync_literal = 0; | |
| 526 break; | |
| 527 default: | |
| 528 goto invalid; | |
| 527 | 529 } |
| 543 | 530 break; |
| 527 | 531 |
| 532 case sw_literal_argument: | |
| 529 | 533 if (s->literal_len && --s->literal_len) { |
| 527 | 534 break; |
| 535 } | |
| 536 | |
| 537 arg = ngx_array_push(&s->args); | |
| 538 if (arg == NULL) { | |
| 539 return NGX_ERROR; | |
| 540 } | |
| 541 arg->len = p + 1 - s->arg_start; | |
| 542 arg->data = s->arg_start; | |
| 543 s->arg_start = NULL; | |
| 544 state = sw_end_literal_argument; | |
| 545 | |
| 546 break; | |
| 547 | |
| 548 case sw_end_literal_argument: | |
| 549 switch (ch) { | |
| 550 case '{': | |
| 551 if (s->args.nelts <= 2) { | |
| 552 state = sw_literal; | |
| 553 break; | |
| 554 } | |
| 555 goto invalid; | |
| 556 case CR: | |
| 557 state = sw_almost_done; | |
| 558 break; | |
| 559 case LF: | |
| 560 goto done; | |
| 561 default: | |
| 529 | 562 state = sw_spaces_before_argument; |
| 563 break; | |
| 527 | 564 } |
| 565 break; | |
| 566 | |
| 567 case sw_almost_done: | |
| 568 switch (ch) { | |
| 569 case LF: | |
| 570 goto done; | |
| 571 default: | |
| 572 goto invalid; | |
| 573 } | |
| 574 } | |
| 575 } | |
| 576 | |
| 577 s->buffer->pos = p; | |
| 578 s->state = state; | |
| 579 | |
| 580 return NGX_AGAIN; | |
| 581 | |
| 582 done: | |
| 583 | |
| 584 s->buffer->pos = p + 1; | |
| 585 | |
| 586 if (s->arg_start) { | |
| 587 arg = ngx_array_push(&s->args); | |
| 588 if (arg == NULL) { | |
| 589 return NGX_ERROR; | |
| 590 } | |
| 591 arg->len = s->arg_end - s->arg_start; | |
| 592 arg->data = s->arg_start; | |
| 543 | 593 |
| 527 | 594 s->arg_start = NULL; |
| 595 s->cmd_start = NULL; | |
| 596 s->quoted = 0; | |
| 543 | 597 s->no_sync_literal = 0; |
| 527 | 598 s->literal_len = 0; |
| 599 } | |
| 600 | |
| 1323 | 601 s->state = (s->command != NGX_IMAP_AUTHENTICATE) ? sw_start : sw_argument; |
| 527 | 602 |
| 603 return NGX_OK; | |
| 604 | |
| 605 invalid: | |
| 606 | |
| 607 s->state = sw_start; | |
| 608 s->quoted = 0; | |
| 543 | 609 s->no_sync_literal = 0; |
| 527 | 610 s->literal_len = 0; |
| 611 | |
| 1136 | 612 return NGX_MAIL_PARSE_INVALID_COMMAND; |
| 527 | 613 } |
| 614 | |
| 615 | |
| 1136 | 616 ngx_int_t ngx_smtp_parse_command(ngx_mail_session_t *s) |
| 527 | 617 { |
| 618 u_char ch, *p, *c, c0, c1, c2, c3; | |
| 619 ngx_str_t *arg; | |
| 620 enum { | |
| 621 sw_start = 0, | |
| 622 sw_spaces_before_argument, | |
| 623 sw_argument, | |
| 624 sw_almost_done | |
| 625 } state; | |
| 626 | |
| 627 state = s->state; | |
| 628 | |
| 629 for (p = s->buffer->pos; p < s->buffer->last; p++) { | |
| 630 ch = *p; | |
| 631 | |
| 632 switch (state) { | |
| 633 | |
| 1136 | 634 /* SMTP command */ |
| 527 | 635 case sw_start: |
| 636 if (ch == ' ' || ch == CR || ch == LF) { | |
| 637 c = s->buffer->start; | |
| 638 | |
| 639 if (p - c == 4) { | |
| 640 | |
| 641 c0 = ngx_toupper(c[0]); | |
| 642 c1 = ngx_toupper(c[1]); | |
| 643 c2 = ngx_toupper(c[2]); | |
| 644 c3 = ngx_toupper(c[3]); | |
| 645 | |
| 1136 | 646 if (c0 == 'H' && c1 == 'E' && c2 == 'L' && c3 == 'O') |
| 527 | 647 { |
| 1136 | 648 s->command = NGX_SMTP_HELO; |
| 527 | 649 |
| 1136 | 650 } else if (c0 == 'E' && c1 == 'H' && c2 == 'L' && c3 == 'O') |
| 800 | 651 { |
| 1136 | 652 s->command = NGX_SMTP_EHLO; |
| 800 | 653 |
| 527 | 654 } else if (c0 == 'Q' && c1 == 'U' && c2 == 'I' && c3 == 'T') |
| 655 { | |
| 1136 | 656 s->command = NGX_SMTP_QUIT; |
| 527 | 657 |
| 809 | 658 } else if (c0 == 'A' && c1 == 'U' && c2 == 'T' && c3 == 'H') |
| 659 { | |
| 1136 | 660 s->command = NGX_SMTP_AUTH; |
| 809 | 661 |
| 527 | 662 } else if (c0 == 'N' && c1 == 'O' && c2 == 'O' && c3 == 'P') |
| 663 { | |
| 1136 | 664 s->command = NGX_SMTP_NOOP; |
| 665 | |
| 666 } else if (c0 == 'M' && c1 == 'A' && c2 == 'I' && c3 == 'L') | |
| 583 | 667 { |
| 1136 | 668 s->command = NGX_SMTP_MAIL; |
| 669 | |
| 670 } else if (c0 == 'R' && c1 == 'S' && c2 == 'E' && c3 == 'T') | |
| 671 { | |
| 672 s->command = NGX_SMTP_RSET; | |
| 673 | |
| 1322 | 674 } else if (c0 == 'R' && c1 == 'C' && c2 == 'P' && c3 == 'T') |
| 675 { | |
| 676 s->command = NGX_SMTP_RCPT; | |
| 677 | |
| 678 } else if (c0 == 'V' && c1 == 'R' && c2 == 'F' && c3 == 'Y') | |
| 679 { | |
| 680 s->command = NGX_SMTP_VRFY; | |
| 681 | |
| 682 } else if (c0 == 'E' && c1 == 'X' && c2 == 'P' && c3 == 'N') | |
| 683 { | |
| 684 s->command = NGX_SMTP_EXPN; | |
| 685 | |
| 686 } else if (c0 == 'H' && c1 == 'E' && c2 == 'L' && c3 == 'P') | |
| 687 { | |
| 688 s->command = NGX_SMTP_HELP; | |
| 689 | |
| 527 | 690 } else { |
| 691 goto invalid; | |
| 692 } | |
| 1322 | 693 #if (NGX_MAIL_SSL) |
| 694 } else if (p - c == 8) { | |
| 527 | 695 |
| 1322 | 696 if ((c[0] == 'S'|| c[0] == 's') |
| 697 && (c[1] == 'T'|| c[1] == 't') | |
| 698 && (c[2] == 'A'|| c[2] == 'a') | |
| 699 && (c[3] == 'R'|| c[3] == 'r') | |
| 700 && (c[4] == 'T'|| c[4] == 't') | |
| 701 && (c[5] == 'T'|| c[5] == 't') | |
| 702 && (c[6] == 'L'|| c[6] == 'l') | |
| 703 && (c[7] == 'S'|| c[7] == 's')) | |
| 704 { | |
| 705 s->command = NGX_SMTP_STARTTLS; | |
| 706 | |
| 707 } else { | |
| 708 goto invalid; | |
| 709 } | |
| 710 #endif | |
| 527 | 711 } else { |
| 712 goto invalid; | |
| 713 } | |
| 714 | |
| 715 switch (ch) { | |
| 716 case ' ': | |
| 717 state = sw_spaces_before_argument; | |
| 718 break; | |
| 719 case CR: | |
| 720 state = sw_almost_done; | |
| 721 break; | |
| 722 case LF: | |
| 723 goto done; | |
| 724 } | |
| 725 break; | |
| 726 } | |
| 727 | |
| 728 if ((ch < 'A' || ch > 'Z') && (ch < 'a' || ch > 'z')) { | |
| 729 goto invalid; | |
| 730 } | |
| 731 | |
| 732 break; | |
| 733 | |
| 734 case sw_spaces_before_argument: | |
| 735 switch (ch) { | |
| 736 case ' ': | |
| 737 break; | |
| 738 case CR: | |
| 739 state = sw_almost_done; | |
| 740 s->arg_end = p; | |
| 741 break; | |
| 742 case LF: | |
| 743 s->arg_end = p; | |
| 744 goto done; | |
| 745 default: | |
| 746 if (s->args.nelts <= 2) { | |
| 747 state = sw_argument; | |
| 748 s->arg_start = p; | |
| 749 break; | |
| 750 } | |
| 751 goto invalid; | |
| 752 } | |
| 753 break; | |
| 754 | |
|
419
47709bff4468
nginx-0.0.10-2004-09-09-19:40:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
417
diff
changeset
|
755 case sw_argument: |
|
47709bff4468
nginx-0.0.10-2004-09-09-19:40:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
417
diff
changeset
|
756 switch (ch) { |
| 800 | 757 case ' ': |
|
419
47709bff4468
nginx-0.0.10-2004-09-09-19:40:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
417
diff
changeset
|
758 case CR: |
|
47709bff4468
nginx-0.0.10-2004-09-09-19:40:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
417
diff
changeset
|
759 case LF: |
| 501 | 760 arg = ngx_array_push(&s->args); |
| 761 if (arg == NULL) { | |
|
419
47709bff4468
nginx-0.0.10-2004-09-09-19:40:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
417
diff
changeset
|
762 return NGX_ERROR; |
|
47709bff4468
nginx-0.0.10-2004-09-09-19:40:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
417
diff
changeset
|
763 } |
| 527 | 764 arg->len = p - s->arg_start; |
|
419
47709bff4468
nginx-0.0.10-2004-09-09-19:40:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
417
diff
changeset
|
765 arg->data = s->arg_start; |
|
47709bff4468
nginx-0.0.10-2004-09-09-19:40:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
417
diff
changeset
|
766 s->arg_start = NULL; |
|
47709bff4468
nginx-0.0.10-2004-09-09-19:40:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
417
diff
changeset
|
767 |
|
47709bff4468
nginx-0.0.10-2004-09-09-19:40:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
417
diff
changeset
|
768 switch (ch) { |
|
47709bff4468
nginx-0.0.10-2004-09-09-19:40:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
417
diff
changeset
|
769 case ' ': |
|
47709bff4468
nginx-0.0.10-2004-09-09-19:40:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
417
diff
changeset
|
770 state = sw_spaces_before_argument; |
|
47709bff4468
nginx-0.0.10-2004-09-09-19:40:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
417
diff
changeset
|
771 break; |
|
47709bff4468
nginx-0.0.10-2004-09-09-19:40:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
417
diff
changeset
|
772 case CR: |
|
47709bff4468
nginx-0.0.10-2004-09-09-19:40:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
417
diff
changeset
|
773 state = sw_almost_done; |
|
47709bff4468
nginx-0.0.10-2004-09-09-19:40:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
417
diff
changeset
|
774 break; |
|
47709bff4468
nginx-0.0.10-2004-09-09-19:40:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
417
diff
changeset
|
775 case LF: |
| 527 | 776 goto done; |
|
419
47709bff4468
nginx-0.0.10-2004-09-09-19:40:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
417
diff
changeset
|
777 } |
|
47709bff4468
nginx-0.0.10-2004-09-09-19:40:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
417
diff
changeset
|
778 break; |
|
47709bff4468
nginx-0.0.10-2004-09-09-19:40:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
417
diff
changeset
|
779 |
|
47709bff4468
nginx-0.0.10-2004-09-09-19:40:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
417
diff
changeset
|
780 default: |
|
47709bff4468
nginx-0.0.10-2004-09-09-19:40:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
417
diff
changeset
|
781 break; |
|
47709bff4468
nginx-0.0.10-2004-09-09-19:40:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
417
diff
changeset
|
782 } |
|
47709bff4468
nginx-0.0.10-2004-09-09-19:40:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
417
diff
changeset
|
783 break; |
|
47709bff4468
nginx-0.0.10-2004-09-09-19:40:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
417
diff
changeset
|
784 |
|
47709bff4468
nginx-0.0.10-2004-09-09-19:40:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
417
diff
changeset
|
785 case sw_almost_done: |
|
47709bff4468
nginx-0.0.10-2004-09-09-19:40:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
417
diff
changeset
|
786 switch (ch) { |
|
47709bff4468
nginx-0.0.10-2004-09-09-19:40:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
417
diff
changeset
|
787 case LF: |
| 527 | 788 goto done; |
|
419
47709bff4468
nginx-0.0.10-2004-09-09-19:40:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
417
diff
changeset
|
789 default: |
| 527 | 790 goto invalid; |
|
419
47709bff4468
nginx-0.0.10-2004-09-09-19:40:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
417
diff
changeset
|
791 } |
|
417
0526206251f6
nginx-0.0.10-2004-09-07-19:29:22 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
792 } |
|
0526206251f6
nginx-0.0.10-2004-09-07-19:29:22 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
793 } |
|
0526206251f6
nginx-0.0.10-2004-09-07-19:29:22 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
794 |
|
419
47709bff4468
nginx-0.0.10-2004-09-09-19:40:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
417
diff
changeset
|
795 s->buffer->pos = p; |
| 527 | 796 s->state = state; |
|
419
47709bff4468
nginx-0.0.10-2004-09-09-19:40:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
417
diff
changeset
|
797 |
| 527 | 798 return NGX_AGAIN; |
| 799 | |
| 800 done: | |
| 801 | |
| 802 s->buffer->pos = p + 1; | |
| 803 | |
| 804 if (s->arg_start) { | |
| 805 arg = ngx_array_push(&s->args); | |
| 806 if (arg == NULL) { | |
| 807 return NGX_ERROR; | |
|
419
47709bff4468
nginx-0.0.10-2004-09-09-19:40:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
417
diff
changeset
|
808 } |
| 527 | 809 arg->len = s->arg_end - s->arg_start; |
| 810 arg->data = s->arg_start; | |
| 811 s->arg_start = NULL; | |
| 812 } | |
|
419
47709bff4468
nginx-0.0.10-2004-09-09-19:40:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
417
diff
changeset
|
813 |
| 1136 | 814 s->state = (s->command != NGX_SMTP_AUTH) ? sw_start : sw_argument; |
| 815 | |
| 527 | 816 return NGX_OK; |
| 817 | |
| 818 invalid: | |
| 819 | |
| 820 s->state = sw_start; | |
| 810 | 821 s->arg_start = NULL; |
| 527 | 822 |
| 1136 | 823 return NGX_MAIL_PARSE_INVALID_COMMAND; |
|
417
0526206251f6
nginx-0.0.10-2004-09-07-19:29:22 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
824 } |