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| 1 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 2 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 4 | |
| 5 #include "cert.h" | |
| 6 #include "base64.h" | |
| 7 #include "secitem.h" | |
| 8 #include "secder.h" | |
| 9 #include "secasn1.h" | |
| 10 #include "secoid.h" | |
| 11 #include "secerr.h" | |
| 12 | |
| 13 SEC_ASN1_MKSUB(SEC_AnyTemplate) | |
| 14 SEC_ASN1_MKSUB(SEC_SetOfAnyTemplate) | |
| 15 | |
| 16 typedef struct ContentInfoStr ContentInfo; | |
| 17 typedef struct DegenerateSignedDataStr DegenerateSignedData; | |
| 18 | |
| 19 struct ContentInfoStr { | |
| 20 SECOidTag contentTypeTag; /* local; not part of encoding */ | |
| 21 SECItem contentType; | |
| 22 union { | |
| 23 SECItem *data; | |
| 24 DegenerateSignedData *signedData; | |
| 25 } content; | |
| 26 }; | |
| 27 | |
| 28 struct DegenerateSignedDataStr { | |
| 29 SECItem version; | |
| 30 SECItem **digestAlgorithms; | |
| 31 ContentInfo contentInfo; | |
| 32 SECItem **certificates; | |
| 33 SECItem **crls; | |
| 34 SECItem **signerInfos; | |
| 35 }; | |
| 36 | |
| 37 static const SEC_ASN1Template * | |
| 38 choose_content_template(void *src_or_dest, PRBool encoding); | |
| 39 | |
| 40 static const SEC_ASN1TemplateChooserPtr template_chooser | |
| 41 = choose_content_template; | |
| 42 | |
| 43 static const SEC_ASN1Template ContentInfoTemplate[] = { | |
| 44 { SEC_ASN1_SEQUENCE, | |
| 45 0, NULL, sizeof(ContentInfo) }, | |
| 46 { SEC_ASN1_OBJECT_ID, | |
| 47 offsetof(ContentInfo,contentType) }, | |
| 48 { SEC_ASN1_OPTIONAL | SEC_ASN1_DYNAMIC | | |
| 49 SEC_ASN1_EXPLICIT | SEC_ASN1_CONSTRUCTED | SEC_ASN1_CONTEXT_SPECIFIC | 0, | |
| 50 offsetof(ContentInfo,content), | |
| 51 &template_chooser }, | |
| 52 { 0 } | |
| 53 }; | |
| 54 | |
| 55 static const SEC_ASN1Template DegenerateSignedDataTemplate[] = { | |
| 56 { SEC_ASN1_SEQUENCE, | |
| 57 0, NULL, sizeof(DegenerateSignedData) }, | |
| 58 { SEC_ASN1_INTEGER, | |
| 59 offsetof(DegenerateSignedData,version) }, | |
| 60 { SEC_ASN1_SET_OF | SEC_ASN1_XTRN, | |
| 61 offsetof(DegenerateSignedData,digestAlgorithms), | |
| 62 SEC_ASN1_SUB(SEC_AnyTemplate) }, | |
| 63 { SEC_ASN1_INLINE, | |
| 64 offsetof(DegenerateSignedData,contentInfo), | |
| 65 ContentInfoTemplate }, | |
| 66 { SEC_ASN1_OPTIONAL | SEC_ASN1_CONSTRUCTED | SEC_ASN1_CONTEXT_SPECIFIC | | |
| 67 SEC_ASN1_XTRN | 0, | |
| 68 offsetof(DegenerateSignedData,certificates), | |
| 69 SEC_ASN1_SUB(SEC_SetOfAnyTemplate) }, | |
| 70 { SEC_ASN1_OPTIONAL | SEC_ASN1_CONSTRUCTED | SEC_ASN1_CONTEXT_SPECIFIC | | |
| 71 SEC_ASN1_XTRN | 1, | |
| 72 offsetof(DegenerateSignedData,crls), | |
| 73 SEC_ASN1_SUB(SEC_SetOfAnyTemplate) }, | |
| 74 { SEC_ASN1_SET_OF | SEC_ASN1_XTRN, | |
| 75 offsetof(DegenerateSignedData,signerInfos), | |
| 76 SEC_ASN1_SUB(SEC_AnyTemplate) }, | |
| 77 { 0 } | |
| 78 }; | |
| 79 | |
| 80 static const SEC_ASN1Template PointerToDegenerateSignedDataTemplate[] = { | |
| 81 { SEC_ASN1_POINTER, 0, DegenerateSignedDataTemplate } | |
| 82 }; | |
| 83 | |
| 84 static SECOidTag | |
| 85 GetContentTypeTag(ContentInfo *cinfo) | |
| 86 { | |
| 87 if (cinfo->contentTypeTag == SEC_OID_UNKNOWN) | |
| 88 cinfo->contentTypeTag = SECOID_FindOIDTag(&cinfo->contentType); | |
| 89 return cinfo->contentTypeTag; | |
| 90 } | |
| 91 | |
| 92 static const SEC_ASN1Template * | |
| 93 choose_content_template(void *src_or_dest, PRBool encoding) | |
| 94 { | |
| 95 const SEC_ASN1Template *theTemplate; | |
| 96 ContentInfo *cinfo; | |
| 97 SECOidTag kind; | |
| 98 | |
| 99 PORT_Assert(src_or_dest != NULL); | |
| 100 if (src_or_dest == NULL) | |
| 101 return NULL; | |
| 102 | |
| 103 cinfo = (ContentInfo*)src_or_dest; | |
| 104 kind = GetContentTypeTag(cinfo); | |
| 105 switch (kind) { | |
| 106 default: | |
| 107 theTemplate = SEC_ASN1_GET(SEC_PointerToAnyTemplate); | |
| 108 break; | |
| 109 case SEC_OID_PKCS7_DATA: | |
| 110 theTemplate = SEC_ASN1_GET(SEC_PointerToOctetStringTemplate); | |
| 111 break; | |
| 112 case SEC_OID_PKCS7_SIGNED_DATA: | |
| 113 theTemplate = PointerToDegenerateSignedDataTemplate; | |
| 114 break; | |
| 115 } | |
| 116 return theTemplate; | |
| 117 } | |
| 118 | |
| 119 static SECStatus | |
| 120 SEC_ReadPKCS7Certs(SECItem *pkcs7Item, CERTImportCertificateFunc f, void *arg) | |
| 121 { | |
| 122 ContentInfo contentInfo; | |
| 123 SECStatus rv; | |
| 124 SECItem **certs; | |
| 125 int count; | |
| 126 PLArenaPool *arena; | |
| 127 | |
| 128 arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE); | |
| 129 if ( arena == NULL ) { | |
| 130 return SECFailure; | |
| 131 } | |
| 132 | |
| 133 PORT_Memset(&contentInfo, 0, sizeof(contentInfo)); | |
| 134 rv = SEC_ASN1DecodeItem(arena, &contentInfo, ContentInfoTemplate, | |
| 135 pkcs7Item); | |
| 136 if ( rv != SECSuccess ) { | |
| 137 goto loser; | |
| 138 } | |
| 139 | |
| 140 if ( GetContentTypeTag(&contentInfo) != SEC_OID_PKCS7_SIGNED_DATA ) { | |
| 141 goto loser; | |
| 142 } | |
| 143 | |
| 144 certs = contentInfo.content.signedData->certificates; | |
| 145 if ( certs ) { | |
| 146 count = 0; | |
| 147 | |
| 148 while ( *certs ) { | |
| 149 count++; | |
| 150 certs++; | |
| 151 } | |
| 152 rv = (* f)(arg, contentInfo.content.signedData->certificates, count); | |
| 153 } | |
| 154 | |
| 155 rv = SECSuccess; | |
| 156 | |
| 157 goto done; | |
| 158 loser: | |
| 159 rv = SECFailure; | |
| 160 | |
| 161 done: | |
| 162 if ( arena ) { | |
| 163 PORT_FreeArena(arena, PR_FALSE); | |
| 164 } | |
| 165 | |
| 166 return(rv); | |
| 167 } | |
| 168 | |
| 169 const SEC_ASN1Template SEC_CertSequenceTemplate[] = { | |
| 170 { SEC_ASN1_SEQUENCE_OF | SEC_ASN1_XTRN, 0, SEC_ASN1_SUB(SEC_AnyTemplate) } | |
| 171 }; | |
| 172 | |
| 173 static SECStatus | |
| 174 SEC_ReadCertSequence(SECItem *certsItem, CERTImportCertificateFunc f, void *arg) | |
| 175 { | |
| 176 SECStatus rv; | |
| 177 SECItem **certs; | |
| 178 int count; | |
| 179 SECItem **rawCerts = NULL; | |
| 180 PLArenaPool *arena; | |
| 181 ContentInfo contentInfo; | |
| 182 | |
| 183 arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE); | |
| 184 if ( arena == NULL ) { | |
| 185 return SECFailure; | |
| 186 } | |
| 187 | |
| 188 PORT_Memset(&contentInfo, 0, sizeof(contentInfo)); | |
| 189 rv = SEC_ASN1DecodeItem(arena, &contentInfo, ContentInfoTemplate, | |
| 190 certsItem); | |
| 191 if ( rv != SECSuccess ) { | |
| 192 goto loser; | |
| 193 } | |
| 194 | |
| 195 if ( GetContentTypeTag(&contentInfo) != SEC_OID_NS_TYPE_CERT_SEQUENCE ) { | |
| 196 goto loser; | |
| 197 } | |
| 198 | |
| 199 rv = SEC_QuickDERDecodeItem(arena, &rawCerts, SEC_CertSequenceTemplate, | |
| 200 contentInfo.content.data); | |
| 201 | |
| 202 if (rv != SECSuccess) { | |
| 203 goto loser; | |
| 204 } | |
| 205 | |
| 206 certs = rawCerts; | |
| 207 if ( certs ) { | |
| 208 count = 0; | |
| 209 | |
| 210 while ( *certs ) { | |
| 211 count++; | |
| 212 certs++; | |
| 213 } | |
| 214 rv = (* f)(arg, rawCerts, count); | |
| 215 } | |
| 216 | |
| 217 rv = SECSuccess; | |
| 218 | |
| 219 goto done; | |
| 220 loser: | |
| 221 rv = SECFailure; | |
| 222 | |
| 223 done: | |
| 224 if ( arena ) { | |
| 225 PORT_FreeArena(arena, PR_FALSE); | |
| 226 } | |
| 227 | |
| 228 return(rv); | |
| 229 } | |
| 230 | |
| 231 CERTCertificate * | |
| 232 CERT_ConvertAndDecodeCertificate(char *certstr) | |
| 233 { | |
| 234 CERTCertificate *cert; | |
| 235 SECStatus rv; | |
| 236 SECItem der; | |
| 237 | |
| 238 rv = ATOB_ConvertAsciiToItem(&der, certstr); | |
| 239 if (rv != SECSuccess) | |
| 240 return NULL; | |
| 241 | |
| 242 cert = CERT_NewTempCertificate(CERT_GetDefaultCertDB(), | |
| 243 &der, NULL, PR_FALSE, PR_TRUE); | |
| 244 | |
| 245 PORT_Free(der.data); | |
| 246 return cert; | |
| 247 } | |
| 248 | |
| 249 static const char NS_CERT_HEADER[] = "-----BEGIN CERTIFICATE-----"; | |
| 250 static const char NS_CERT_TRAILER[] = "-----END CERTIFICATE-----"; | |
| 251 #define NS_CERT_HEADER_LEN ((sizeof NS_CERT_HEADER) - 1) | |
| 252 #define NS_CERT_TRAILER_LEN ((sizeof NS_CERT_TRAILER) - 1) | |
| 253 | |
| 254 /* | |
| 255 * read an old style ascii or binary certificate chain | |
| 256 */ | |
| 257 SECStatus | |
| 258 CERT_DecodeCertPackage(char *certbuf, | |
| 259 int certlen, | |
| 260 CERTImportCertificateFunc f, | |
| 261 void *arg) | |
| 262 { | |
| 263 unsigned char *cp; | |
| 264 unsigned char *bincert = NULL; | |
| 265 char * ascCert = NULL; | |
| 266 SECStatus rv; | |
| 267 | |
| 268 if ( certbuf == NULL ) { | |
| 269 PORT_SetError(SEC_ERROR_INVALID_ARGS); | |
| 270 return(SECFailure); | |
| 271 } | |
| 272 /* | |
| 273 * Make sure certlen is long enough to handle the longest possible | |
| 274 * reference in the code below: | |
| 275 * 0x30 0x84 l1 l2 l3 l4 + | |
| 276 * tag 9 o1 o2 o3 o4 o5 o6 o7 o8 o9 | |
| 277 * where 9 is the longest length of the expected oids we are testing. | |
| 278 * 6 + 11 = 17. 17 bytes is clearly too small to code any kind of | |
| 279 * certificate (a 128 bit ECC certificate contains at least an 8 byte | |
| 280 * key and a 16 byte signature, plus coding overhead). Typically a cert | |
| 281 * is much larger. So it's safe to require certlen to be at least 17 | |
| 282 * bytes. | |
| 283 */ | |
| 284 if (certlen < 17) { | |
| 285 PORT_SetError(SEC_ERROR_INPUT_LEN); | |
| 286 return(SECFailure); | |
| 287 } | |
| 288 | |
| 289 cp = (unsigned char *)certbuf; | |
| 290 | |
| 291 /* is a DER encoded certificate of some type? */ | |
| 292 if ( ( *cp & 0x1f ) == SEC_ASN1_SEQUENCE ) { | |
| 293 SECItem certitem; | |
| 294 SECItem *pcertitem = &certitem; | |
| 295 int seqLen, seqLenLen; | |
| 296 | |
| 297 cp++; | |
| 298 | |
| 299 if ( *cp & 0x80) { | |
| 300 /* Multibyte length */ | |
| 301 seqLenLen = cp[0] & 0x7f; | |
| 302 | |
| 303 switch (seqLenLen) { | |
| 304 case 4: | |
| 305 seqLen = ((unsigned long)cp[1]<<24) | | |
| 306 ((unsigned long)cp[2]<<16) | (cp[3]<<8) | cp[4]; | |
| 307 break; | |
| 308 case 3: | |
| 309 seqLen = ((unsigned long)cp[1]<<16) | (cp[2]<<8) | cp[3]; | |
| 310 break; | |
| 311 case 2: | |
| 312 seqLen = (cp[1]<<8) | cp[2]; | |
| 313 break; | |
| 314 case 1: | |
| 315 seqLen = cp[1]; | |
| 316 break; | |
| 317 case 0: | |
| 318 /* indefinite length */ | |
| 319 seqLen = 0; | |
| 320 break; | |
| 321 default: | |
| 322 goto notder; | |
| 323 } | |
| 324 cp += ( seqLenLen + 1 ); | |
| 325 | |
| 326 } else { | |
| 327 seqLenLen = 0; | |
| 328 seqLen = *cp; | |
| 329 cp++; | |
| 330 } | |
| 331 | |
| 332 /* check entire length if definite length */ | |
| 333 if ( seqLen || seqLenLen ) { | |
| 334 if ( certlen != ( seqLen + seqLenLen + 2 ) ) { | |
| 335 if (certlen > ( seqLen + seqLenLen + 2 )) | |
| 336 PORT_SetError(SEC_ERROR_EXTRA_INPUT); | |
| 337 else | |
| 338 PORT_SetError(SEC_ERROR_INPUT_LEN); | |
| 339 goto notder; | |
| 340 } | |
| 341 } | |
| 342 | |
| 343 /* check the type oid */ | |
| 344 if ( cp[0] == SEC_ASN1_OBJECT_ID ) { | |
| 345 SECOidData *oiddata; | |
| 346 SECItem oiditem; | |
| 347 /* XXX - assume DER encoding of OID len!! */ | |
| 348 oiditem.len = cp[1]; | |
| 349 /* if we add an oid below that is longer than 9 bytes, then we | |
| 350 * need to change the certlen check at the top of the function | |
| 351 * to prevent a buffer overflow | |
| 352 */ | |
| 353 if ( oiditem.len > 9 ) { | |
| 354 PORT_SetError(SEC_ERROR_UNRECOGNIZED_OID); | |
| 355 return(SECFailure); | |
| 356 } | |
| 357 oiditem.data = (unsigned char *)&cp[2]; | |
| 358 oiddata = SECOID_FindOID(&oiditem); | |
| 359 if ( oiddata == NULL ) { | |
| 360 return(SECFailure); | |
| 361 } | |
| 362 | |
| 363 certitem.data = (unsigned char*)certbuf; | |
| 364 certitem.len = certlen; | |
| 365 | |
| 366 switch ( oiddata->offset ) { | |
| 367 case SEC_OID_PKCS7_SIGNED_DATA: | |
| 368 /* oid: 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x07, 0x02 */ | |
| 369 return(SEC_ReadPKCS7Certs(&certitem, f, arg)); | |
| 370 break; | |
| 371 case SEC_OID_NS_TYPE_CERT_SEQUENCE: | |
| 372 /* oid: 0x60, 0x86, 0x48, 0x01, 0x86, 0xf8, 0x42, 0x02, 0x05 */ | |
| 373 return(SEC_ReadCertSequence(&certitem, f, arg)); | |
| 374 break; | |
| 375 default: | |
| 376 break; | |
| 377 } | |
| 378 | |
| 379 } else { | |
| 380 /* it had better be a certificate by now!! */ | |
| 381 certitem.data = (unsigned char*)certbuf; | |
| 382 certitem.len = certlen; | |
| 383 | |
| 384 rv = (* f)(arg, &pcertitem, 1); | |
| 385 return(rv); | |
| 386 } | |
| 387 } | |
| 388 | |
| 389 /* now look for a netscape base64 ascii encoded cert */ | |
| 390 notder: | |
| 391 { | |
| 392 unsigned char *certbegin = NULL; | |
| 393 unsigned char *certend = NULL; | |
| 394 char *pc; | |
| 395 int cl; | |
| 396 | |
| 397 /* Convert the ASCII data into a nul-terminated string */ | |
| 398 ascCert = (char *)PORT_Alloc(certlen + 1); | |
| 399 if (!ascCert) { | |
| 400 rv = SECFailure; | |
| 401 goto loser; | |
| 402 } | |
| 403 | |
| 404 PORT_Memcpy(ascCert, certbuf, certlen); | |
| 405 ascCert[certlen] = '\0'; | |
| 406 | |
| 407 pc = PORT_Strchr(ascCert, '\n'); /* find an EOL */ | |
| 408 if (!pc) { /* maybe this is a MAC file */ | |
| 409 pc = ascCert; | |
| 410 while (*pc && NULL != (pc = PORT_Strchr(pc, '\r'))) { | |
| 411 *pc++ = '\n'; | |
| 412 } | |
| 413 } | |
| 414 | |
| 415 cp = (unsigned char *)ascCert; | |
| 416 cl = certlen; | |
| 417 | |
| 418 /* find the beginning marker */ | |
| 419 while ( cl > NS_CERT_HEADER_LEN ) { | |
| 420 int found = 0; | |
| 421 if ( !PORT_Strncasecmp((char *)cp, NS_CERT_HEADER, | |
| 422 NS_CERT_HEADER_LEN) ) { | |
| 423 cl -= NS_CERT_HEADER_LEN; | |
| 424 cp += NS_CERT_HEADER_LEN; | |
| 425 found = 1; | |
| 426 } | |
| 427 | |
| 428 /* skip to next eol */ | |
| 429 while ( cl && ( *cp != '\n' )) { | |
| 430 cp++; | |
| 431 cl--; | |
| 432 } | |
| 433 | |
| 434 /* skip all blank lines */ | |
| 435 while ( cl && ( *cp == '\n' || *cp == '\r' )) { | |
| 436 cp++; | |
| 437 cl--; | |
| 438 } | |
| 439 if (cl && found) { | |
| 440 certbegin = cp; | |
| 441 break; | |
| 442 } | |
| 443 } | |
| 444 | |
| 445 if ( certbegin ) { | |
| 446 /* find the ending marker */ | |
| 447 while ( cl >= NS_CERT_TRAILER_LEN ) { | |
| 448 if ( !PORT_Strncasecmp((char *)cp, NS_CERT_TRAILER, | |
| 449 NS_CERT_TRAILER_LEN) ) { | |
| 450 certend = cp; | |
| 451 break; | |
| 452 } | |
| 453 | |
| 454 /* skip to next eol */ | |
| 455 while ( cl && ( *cp != '\n' )) { | |
| 456 cp++; | |
| 457 cl--; | |
| 458 } | |
| 459 | |
| 460 /* skip all blank lines */ | |
| 461 while ( cl && ( *cp == '\n' || *cp == '\r' )) { | |
| 462 cp++; | |
| 463 cl--; | |
| 464 } | |
| 465 } | |
| 466 } | |
| 467 | |
| 468 if ( certbegin && certend ) { | |
| 469 unsigned int binLen; | |
| 470 | |
| 471 *certend = 0; | |
| 472 /* convert to binary */ | |
| 473 bincert = ATOB_AsciiToData((char *)certbegin, &binLen); | |
| 474 if (!bincert) { | |
| 475 rv = SECFailure; | |
| 476 goto loser; | |
| 477 } | |
| 478 | |
| 479 /* now recurse to decode the binary */ | |
| 480 rv = CERT_DecodeCertPackage((char *)bincert, binLen, f, arg); | |
| 481 | |
| 482 } else { | |
| 483 PORT_SetError(SEC_ERROR_BAD_DER); | |
| 484 rv = SECFailure; | |
| 485 } | |
| 486 } | |
| 487 | |
| 488 loser: | |
| 489 | |
| 490 if ( bincert ) { | |
| 491 PORT_Free(bincert); | |
| 492 } | |
| 493 | |
| 494 if ( ascCert ) { | |
| 495 PORT_Free(ascCert); | |
| 496 } | |
| 497 | |
| 498 return(rv); | |
| 499 } | |
| 500 | |
| 501 typedef struct { | |
| 502 PLArenaPool *arena; | |
| 503 SECItem cert; | |
| 504 } collect_args; | |
| 505 | |
| 506 static SECStatus | |
| 507 collect_certs(void *arg, SECItem **certs, int numcerts) | |
| 508 { | |
| 509 SECStatus rv; | |
| 510 collect_args *collectArgs; | |
| 511 | |
| 512 collectArgs = (collect_args *)arg; | |
| 513 | |
| 514 rv = SECITEM_CopyItem(collectArgs->arena, &collectArgs->cert, *certs); | |
| 515 | |
| 516 return(rv); | |
| 517 } | |
| 518 | |
| 519 | |
| 520 /* | |
| 521 * read an old style ascii or binary certificate | |
| 522 */ | |
| 523 CERTCertificate * | |
| 524 CERT_DecodeCertFromPackage(char *certbuf, int certlen) | |
| 525 { | |
| 526 collect_args collectArgs; | |
| 527 SECStatus rv; | |
| 528 CERTCertificate *cert = NULL; | |
| 529 | |
| 530 collectArgs.arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE); | |
| 531 | |
| 532 rv = CERT_DecodeCertPackage(certbuf, certlen, collect_certs, | |
| 533 (void *)&collectArgs); | |
| 534 if ( rv == SECSuccess ) { | |
| 535 cert = CERT_NewTempCertificate(CERT_GetDefaultCertDB(), | |
| 536 &collectArgs.cert, NULL, | |
| 537 PR_FALSE, PR_TRUE); | |
| 538 } | |
| 539 | |
| 540 PORT_FreeArena(collectArgs.arena, PR_FALSE); | |
| 541 | |
| 542 return(cert); | |
| 543 } | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 2078763002:
Delete bundled copy of NSS and replace with README. (Closed)
Base URL: https://chromium.googlesource.com/chromium/deps/nss@master