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| 1 /* ocsp_ht.c */ | |
| 2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL | |
| 3 * project 2006. | |
| 4 */ | |
| 5 /* ==================================================================== | |
| 6 * Copyright (c) 2006 The OpenSSL Project. All rights reserved. | |
| 7 * | |
| 8 * Redistribution and use in source and binary forms, with or without | |
| 9 * modification, are permitted provided that the following conditions | |
| 10 * are met: | |
| 11 * | |
| 12 * 1. Redistributions of source code must retain the above copyright | |
| 13 * notice, this list of conditions and the following disclaimer. | |
| 14 * | |
| 15 * 2. Redistributions in binary form must reproduce the above copyright | |
| 16 * notice, this list of conditions and the following disclaimer in | |
| 17 * the documentation and/or other materials provided with the | |
| 18 * distribution. | |
| 19 * | |
| 20 * 3. All advertising materials mentioning features or use of this | |
| 21 * software must display the following acknowledgment: | |
| 22 * "This product includes software developed by the OpenSSL Project | |
| 23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" | |
| 24 * | |
| 25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | |
| 26 * endorse or promote products derived from this software without | |
| 27 * prior written permission. For written permission, please contact | |
| 28 * licensing@OpenSSL.org. | |
| 29 * | |
| 30 * 5. Products derived from this software may not be called "OpenSSL" | |
| 31 * nor may "OpenSSL" appear in their names without prior written | |
| 32 * permission of the OpenSSL Project. | |
| 33 * | |
| 34 * 6. Redistributions of any form whatsoever must retain the following | |
| 35 * acknowledgment: | |
| 36 * "This product includes software developed by the OpenSSL Project | |
| 37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" | |
| 38 * | |
| 39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | |
| 40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
| 42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | |
| 43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
| 45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
| 46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
| 48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
| 49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
| 50 * OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 51 * ==================================================================== | |
| 52 * | |
| 53 * This product includes cryptographic software written by Eric Young | |
| 54 * (eay@cryptsoft.com). This product includes software written by Tim | |
| 55 * Hudson (tjh@cryptsoft.com). | |
| 56 * | |
| 57 */ | |
| 58 | |
| 59 #include <stdio.h> | |
| 60 #include <stdlib.h> | |
| 61 #include <ctype.h> | |
| 62 #include <string.h> | |
| 63 #include "e_os.h" | |
| 64 #include <openssl/asn1.h> | |
| 65 #include <openssl/ocsp.h> | |
| 66 #include <openssl/err.h> | |
| 67 #include <openssl/buffer.h> | |
| 68 #ifdef OPENSSL_SYS_SUNOS | |
| 69 #define strtoul (unsigned long)strtol | |
| 70 #endif /* OPENSSL_SYS_SUNOS */ | |
| 71 | |
| 72 /* Stateful OCSP request code, supporting non-blocking I/O */ | |
| 73 | |
| 74 /* Opaque OCSP request status structure */ | |
| 75 | |
| 76 struct ocsp_req_ctx_st { | |
| 77 int state; /* Current I/O state */ | |
| 78 unsigned char *iobuf; /* Line buffer */ | |
| 79 int iobuflen; /* Line buffer length */ | |
| 80 BIO *io; /* BIO to perform I/O with */ | |
| 81 BIO *mem; /* Memory BIO response is built into */ | |
| 82 unsigned long asn1_len; /* ASN1 length of response */ | |
| 83 }; | |
| 84 | |
| 85 #define OCSP_MAX_REQUEST_LENGTH (100 * 1024) | |
| 86 #define OCSP_MAX_LINE_LEN 4096; | |
| 87 | |
| 88 /* OCSP states */ | |
| 89 | |
| 90 /* If set no reading should be performed */ | |
| 91 #define OHS_NOREAD 0x1000 | |
| 92 /* Error condition */ | |
| 93 #define OHS_ERROR (0 | OHS_NOREAD) | |
| 94 /* First line being read */ | |
| 95 #define OHS_FIRSTLINE 1 | |
| 96 /* MIME headers being read */ | |
| 97 #define OHS_HEADERS 2 | |
| 98 /* OCSP initial header (tag + length) being read */ | |
| 99 #define OHS_ASN1_HEADER 3 | |
| 100 /* OCSP content octets being read */ | |
| 101 #define OHS_ASN1_CONTENT 4 | |
| 102 /* Request being sent */ | |
| 103 #define OHS_ASN1_WRITE (6 | OHS_NOREAD) | |
| 104 /* Request being flushed */ | |
| 105 #define OHS_ASN1_FLUSH (7 | OHS_NOREAD) | |
| 106 /* Completed */ | |
| 107 #define OHS_DONE (8 | OHS_NOREAD) | |
| 108 | |
| 109 | |
| 110 static int parse_http_line1(char *line); | |
| 111 | |
| 112 void OCSP_REQ_CTX_free(OCSP_REQ_CTX *rctx) | |
| 113 { | |
| 114 if (rctx->mem) | |
| 115 BIO_free(rctx->mem); | |
| 116 if (rctx->iobuf) | |
| 117 OPENSSL_free(rctx->iobuf); | |
| 118 OPENSSL_free(rctx); | |
| 119 } | |
| 120 | |
| 121 int OCSP_REQ_CTX_set1_req(OCSP_REQ_CTX *rctx, OCSP_REQUEST *req) | |
| 122 { | |
| 123 static const char req_hdr[] = | |
| 124 "Content-Type: application/ocsp-request\r\n" | |
| 125 "Content-Length: %d\r\n\r\n"; | |
| 126 if (BIO_printf(rctx->mem, req_hdr, i2d_OCSP_REQUEST(req, NULL)) <= 0) | |
| 127 return 0; | |
| 128 if (i2d_OCSP_REQUEST_bio(rctx->mem, req) <= 0) | |
| 129 return 0; | |
| 130 rctx->state = OHS_ASN1_WRITE; | |
| 131 rctx->asn1_len = BIO_get_mem_data(rctx->mem, NULL); | |
| 132 return 1; | |
| 133 } | |
| 134 | |
| 135 int OCSP_REQ_CTX_add1_header(OCSP_REQ_CTX *rctx, | |
| 136 const char *name, const char *value) | |
| 137 { | |
| 138 if (!name) | |
| 139 return 0; | |
| 140 if (BIO_puts(rctx->mem, name) <= 0) | |
| 141 return 0; | |
| 142 if (value) | |
| 143 { | |
| 144 if (BIO_write(rctx->mem, ": ", 2) != 2) | |
| 145 return 0; | |
| 146 if (BIO_puts(rctx->mem, value) <= 0) | |
| 147 return 0; | |
| 148 } | |
| 149 if (BIO_write(rctx->mem, "\r\n", 2) != 2) | |
| 150 return 0; | |
| 151 return 1; | |
| 152 } | |
| 153 | |
| 154 OCSP_REQ_CTX *OCSP_sendreq_new(BIO *io, char *path, OCSP_REQUEST *req, | |
| 155 int maxline) | |
| 156 { | |
| 157 static const char post_hdr[] = "POST %s HTTP/1.0\r\n"; | |
| 158 | |
| 159 OCSP_REQ_CTX *rctx; | |
| 160 rctx = OPENSSL_malloc(sizeof(OCSP_REQ_CTX)); | |
| 161 rctx->state = OHS_ERROR; | |
| 162 rctx->mem = BIO_new(BIO_s_mem()); | |
| 163 rctx->io = io; | |
| 164 rctx->asn1_len = 0; | |
| 165 if (maxline > 0) | |
| 166 rctx->iobuflen = maxline; | |
| 167 else | |
| 168 rctx->iobuflen = OCSP_MAX_LINE_LEN; | |
| 169 rctx->iobuf = OPENSSL_malloc(rctx->iobuflen); | |
| 170 if (!rctx->iobuf) | |
| 171 return 0; | |
| 172 if (!path) | |
| 173 path = "/"; | |
| 174 | |
| 175 if (BIO_printf(rctx->mem, post_hdr, path) <= 0) | |
| 176 return 0; | |
| 177 | |
| 178 if (req && !OCSP_REQ_CTX_set1_req(rctx, req)) | |
| 179 return 0; | |
| 180 | |
| 181 return rctx; | |
| 182 } | |
| 183 | |
| 184 /* Parse the HTTP response. This will look like this: | |
| 185 * "HTTP/1.0 200 OK". We need to obtain the numeric code and | |
| 186 * (optional) informational message. | |
| 187 */ | |
| 188 | |
| 189 static int parse_http_line1(char *line) | |
| 190 { | |
| 191 int retcode; | |
| 192 char *p, *q, *r; | |
| 193 /* Skip to first white space (passed protocol info) */ | |
| 194 | |
| 195 for(p = line; *p && !isspace((unsigned char)*p); p++) | |
| 196 continue; | |
| 197 if(!*p) | |
| 198 { | |
| 199 OCSPerr(OCSP_F_PARSE_HTTP_LINE1, | |
| 200 OCSP_R_SERVER_RESPONSE_PARSE_ERROR); | |
| 201 return 0; | |
| 202 } | |
| 203 | |
| 204 /* Skip past white space to start of response code */ | |
| 205 while(*p && isspace((unsigned char)*p)) | |
| 206 p++; | |
| 207 | |
| 208 if(!*p) | |
| 209 { | |
| 210 OCSPerr(OCSP_F_PARSE_HTTP_LINE1, | |
| 211 OCSP_R_SERVER_RESPONSE_PARSE_ERROR); | |
| 212 return 0; | |
| 213 } | |
| 214 | |
| 215 /* Find end of response code: first whitespace after start of code */ | |
| 216 for(q = p; *q && !isspace((unsigned char)*q); q++) | |
| 217 continue; | |
| 218 | |
| 219 if(!*q) | |
| 220 { | |
| 221 OCSPerr(OCSP_F_PARSE_HTTP_LINE1, | |
| 222 OCSP_R_SERVER_RESPONSE_PARSE_ERROR); | |
| 223 return 0; | |
| 224 } | |
| 225 | |
| 226 /* Set end of response code and start of message */ | |
| 227 *q++ = 0; | |
| 228 | |
| 229 /* Attempt to parse numeric code */ | |
| 230 retcode = strtoul(p, &r, 10); | |
| 231 | |
| 232 if(*r) | |
| 233 return 0; | |
| 234 | |
| 235 /* Skip over any leading white space in message */ | |
| 236 while(*q && isspace((unsigned char)*q)) | |
| 237 q++; | |
| 238 | |
| 239 if(*q) | |
| 240 { | |
| 241 /* Finally zap any trailing white space in message (include | |
| 242 * CRLF) */ | |
| 243 | |
| 244 /* We know q has a non white space character so this is OK */ | |
| 245 for(r = q + strlen(q) - 1; isspace((unsigned char)*r); r--) | |
| 246 *r = 0; | |
| 247 } | |
| 248 if(retcode != 200) | |
| 249 { | |
| 250 OCSPerr(OCSP_F_PARSE_HTTP_LINE1, OCSP_R_SERVER_RESPONSE_ERROR); | |
| 251 if(!*q) | |
| 252 ERR_add_error_data(2, "Code=", p); | |
| 253 else | |
| 254 ERR_add_error_data(4, "Code=", p, ",Reason=", q); | |
| 255 return 0; | |
| 256 } | |
| 257 | |
| 258 | |
| 259 return 1; | |
| 260 | |
| 261 } | |
| 262 | |
| 263 int OCSP_sendreq_nbio(OCSP_RESPONSE **presp, OCSP_REQ_CTX *rctx) | |
| 264 { | |
| 265 int i, n; | |
| 266 const unsigned char *p; | |
| 267 next_io: | |
| 268 if (!(rctx->state & OHS_NOREAD)) | |
| 269 { | |
| 270 n = BIO_read(rctx->io, rctx->iobuf, rctx->iobuflen); | |
| 271 | |
| 272 if (n <= 0) | |
| 273 { | |
| 274 if (BIO_should_retry(rctx->io)) | |
| 275 return -1; | |
| 276 return 0; | |
| 277 } | |
| 278 | |
| 279 /* Write data to memory BIO */ | |
| 280 | |
| 281 if (BIO_write(rctx->mem, rctx->iobuf, n) != n) | |
| 282 return 0; | |
| 283 } | |
| 284 | |
| 285 switch(rctx->state) | |
| 286 { | |
| 287 | |
| 288 case OHS_ASN1_WRITE: | |
| 289 n = BIO_get_mem_data(rctx->mem, &p); | |
| 290 | |
| 291 i = BIO_write(rctx->io, | |
| 292 p + (n - rctx->asn1_len), rctx->asn1_len); | |
| 293 | |
| 294 if (i <= 0) | |
| 295 { | |
| 296 if (BIO_should_retry(rctx->io)) | |
| 297 return -1; | |
| 298 rctx->state = OHS_ERROR; | |
| 299 return 0; | |
| 300 } | |
| 301 | |
| 302 rctx->asn1_len -= i; | |
| 303 | |
| 304 if (rctx->asn1_len > 0) | |
| 305 goto next_io; | |
| 306 | |
| 307 rctx->state = OHS_ASN1_FLUSH; | |
| 308 | |
| 309 (void)BIO_reset(rctx->mem); | |
| 310 | |
| 311 case OHS_ASN1_FLUSH: | |
| 312 | |
| 313 i = BIO_flush(rctx->io); | |
| 314 | |
| 315 if (i > 0) | |
| 316 { | |
| 317 rctx->state = OHS_FIRSTLINE; | |
| 318 goto next_io; | |
| 319 } | |
| 320 | |
| 321 if (BIO_should_retry(rctx->io)) | |
| 322 return -1; | |
| 323 | |
| 324 rctx->state = OHS_ERROR; | |
| 325 return 0; | |
| 326 | |
| 327 case OHS_ERROR: | |
| 328 return 0; | |
| 329 | |
| 330 case OHS_FIRSTLINE: | |
| 331 case OHS_HEADERS: | |
| 332 | |
| 333 /* Attempt to read a line in */ | |
| 334 | |
| 335 next_line: | |
| 336 /* Due to &%^*$" memory BIO behaviour with BIO_gets we | |
| 337 * have to check there's a complete line in there before | |
| 338 * calling BIO_gets or we'll just get a partial read. | |
| 339 */ | |
| 340 n = BIO_get_mem_data(rctx->mem, &p); | |
| 341 if ((n <= 0) || !memchr(p, '\n', n)) | |
| 342 { | |
| 343 if (n >= rctx->iobuflen) | |
| 344 { | |
| 345 rctx->state = OHS_ERROR; | |
| 346 return 0; | |
| 347 } | |
| 348 goto next_io; | |
| 349 } | |
| 350 n = BIO_gets(rctx->mem, (char *)rctx->iobuf, rctx->iobuflen); | |
| 351 | |
| 352 if (n <= 0) | |
| 353 { | |
| 354 if (BIO_should_retry(rctx->mem)) | |
| 355 goto next_io; | |
| 356 rctx->state = OHS_ERROR; | |
| 357 return 0; | |
| 358 } | |
| 359 | |
| 360 /* Don't allow excessive lines */ | |
| 361 if (n == rctx->iobuflen) | |
| 362 { | |
| 363 rctx->state = OHS_ERROR; | |
| 364 return 0; | |
| 365 } | |
| 366 | |
| 367 /* First line */ | |
| 368 if (rctx->state == OHS_FIRSTLINE) | |
| 369 { | |
| 370 if (parse_http_line1((char *)rctx->iobuf)) | |
| 371 { | |
| 372 rctx->state = OHS_HEADERS; | |
| 373 goto next_line; | |
| 374 } | |
| 375 else | |
| 376 { | |
| 377 rctx->state = OHS_ERROR; | |
| 378 return 0; | |
| 379 } | |
| 380 } | |
| 381 else | |
| 382 { | |
| 383 /* Look for blank line: end of headers */ | |
| 384 for (p = rctx->iobuf; *p; p++) | |
| 385 { | |
| 386 if ((*p != '\r') && (*p != '\n')) | |
| 387 break; | |
| 388 } | |
| 389 if (*p) | |
| 390 goto next_line; | |
| 391 | |
| 392 rctx->state = OHS_ASN1_HEADER; | |
| 393 | |
| 394 } | |
| 395 | |
| 396 /* Fall thru */ | |
| 397 | |
| 398 | |
| 399 case OHS_ASN1_HEADER: | |
| 400 /* Now reading ASN1 header: can read at least 2 bytes which | |
| 401 * is enough for ASN1 SEQUENCE header and either length field | |
| 402 * or at least the length of the length field. | |
| 403 */ | |
| 404 n = BIO_get_mem_data(rctx->mem, &p); | |
| 405 if (n < 2) | |
| 406 goto next_io; | |
| 407 | |
| 408 /* Check it is an ASN1 SEQUENCE */ | |
| 409 if (*p++ != (V_ASN1_SEQUENCE|V_ASN1_CONSTRUCTED)) | |
| 410 { | |
| 411 rctx->state = OHS_ERROR; | |
| 412 return 0; | |
| 413 } | |
| 414 | |
| 415 /* Check out length field */ | |
| 416 if (*p & 0x80) | |
| 417 { | |
| 418 /* If MSB set on initial length octet we can now | |
| 419 * always read 6 octets: make sure we have them. | |
| 420 */ | |
| 421 if (n < 6) | |
| 422 goto next_io; | |
| 423 n = *p & 0x7F; | |
| 424 /* Not NDEF or excessive length */ | |
| 425 if (!n || (n > 4)) | |
| 426 { | |
| 427 rctx->state = OHS_ERROR; | |
| 428 return 0; | |
| 429 } | |
| 430 p++; | |
| 431 rctx->asn1_len = 0; | |
| 432 for (i = 0; i < n; i++) | |
| 433 { | |
| 434 rctx->asn1_len <<= 8; | |
| 435 rctx->asn1_len |= *p++; | |
| 436 } | |
| 437 | |
| 438 if (rctx->asn1_len > OCSP_MAX_REQUEST_LENGTH) | |
| 439 { | |
| 440 rctx->state = OHS_ERROR; | |
| 441 return 0; | |
| 442 } | |
| 443 | |
| 444 rctx->asn1_len += n + 2; | |
| 445 } | |
| 446 else | |
| 447 rctx->asn1_len = *p + 2; | |
| 448 | |
| 449 rctx->state = OHS_ASN1_CONTENT; | |
| 450 | |
| 451 /* Fall thru */ | |
| 452 | |
| 453 case OHS_ASN1_CONTENT: | |
| 454 n = BIO_get_mem_data(rctx->mem, &p); | |
| 455 if (n < (int)rctx->asn1_len) | |
| 456 goto next_io; | |
| 457 | |
| 458 | |
| 459 *presp = d2i_OCSP_RESPONSE(NULL, &p, rctx->asn1_len); | |
| 460 if (*presp) | |
| 461 { | |
| 462 rctx->state = OHS_DONE; | |
| 463 return 1; | |
| 464 } | |
| 465 | |
| 466 rctx->state = OHS_ERROR; | |
| 467 return 0; | |
| 468 | |
| 469 break; | |
| 470 | |
| 471 case OHS_DONE: | |
| 472 return 1; | |
| 473 | |
| 474 } | |
| 475 | |
| 476 | |
| 477 | |
| 478 return 0; | |
| 479 | |
| 480 | |
| 481 } | |
| 482 | |
| 483 /* Blocking OCSP request handler: now a special case of non-blocking I/O */ | |
| 484 | |
| 485 OCSP_RESPONSE *OCSP_sendreq_bio(BIO *b, char *path, OCSP_REQUEST *req) | |
| 486 { | |
| 487 OCSP_RESPONSE *resp = NULL; | |
| 488 OCSP_REQ_CTX *ctx; | |
| 489 int rv; | |
| 490 | |
| 491 ctx = OCSP_sendreq_new(b, path, req, -1); | |
| 492 | |
| 493 do | |
| 494 { | |
| 495 rv = OCSP_sendreq_nbio(&resp, ctx); | |
| 496 } while ((rv == -1) && BIO_should_retry(b)); | |
| 497 | |
| 498 OCSP_REQ_CTX_free(ctx); | |
| 499 | |
| 500 if (rv) | |
| 501 return resp; | |
| 502 | |
| 503 return NULL; | |
| 504 } | |
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Chromium Code Reviews
Issue 2072073002:
Delete bundled copy of OpenSSL and replace with README. (Closed)
Base URL: https://chromium.googlesource.com/chromium/deps/openssl@master