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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 "secpkcs7.h" | |
| 7 #include "base64.h" | |
| 8 #include "secitem.h" | |
| 9 #include "secder.h" | |
| 10 #include "secasn1.h" | |
| 11 #include "secoid.h" | |
| 12 #include "secerr.h" | |
| 13 | |
| 14 SEC_ASN1_MKSUB(SEC_AnyTemplate) | |
| 15 | |
| 16 SECStatus | |
| 17 SEC_ReadPKCS7Certs(SECItem *pkcs7Item, CERTImportCertificateFunc f, void *arg) | |
| 18 { | |
| 19 SEC_PKCS7ContentInfo *contentInfo = NULL; | |
| 20 SECStatus rv; | |
| 21 SECItem **certs; | |
| 22 int count; | |
| 23 | |
| 24 contentInfo = SEC_PKCS7DecodeItem(pkcs7Item, NULL, NULL, NULL, NULL, NULL, | |
| 25 NULL, NULL); | |
| 26 if ( contentInfo == NULL ) { | |
| 27 goto loser; | |
| 28 } | |
| 29 | |
| 30 if ( SEC_PKCS7ContentType (contentInfo) != SEC_OID_PKCS7_SIGNED_DATA ) { | |
| 31 goto loser; | |
| 32 } | |
| 33 | |
| 34 certs = contentInfo->content.signedData->rawCerts; | |
| 35 if ( certs ) { | |
| 36 count = 0; | |
| 37 | |
| 38 while ( *certs ) { | |
| 39 count++; | |
| 40 certs++; | |
| 41 } | |
| 42 rv = (* f)(arg, contentInfo->content.signedData->rawCerts, count); | |
| 43 } | |
| 44 | |
| 45 rv = SECSuccess; | |
| 46 | |
| 47 goto done; | |
| 48 loser: | |
| 49 rv = SECFailure; | |
| 50 | |
| 51 done: | |
| 52 if ( contentInfo ) { | |
| 53 SEC_PKCS7DestroyContentInfo(contentInfo); | |
| 54 } | |
| 55 | |
| 56 return(rv); | |
| 57 } | |
| 58 | |
| 59 const SEC_ASN1Template SEC_CertSequenceTemplate[] = { | |
| 60 { SEC_ASN1_SEQUENCE_OF | SEC_ASN1_XTRN, 0, SEC_ASN1_SUB(SEC_AnyTemplate) } | |
| 61 }; | |
| 62 | |
| 63 SECStatus | |
| 64 SEC_ReadCertSequence(SECItem *certsItem, CERTImportCertificateFunc f, void *arg) | |
| 65 { | |
| 66 SECStatus rv; | |
| 67 SECItem **certs; | |
| 68 int count; | |
| 69 SECItem **rawCerts = NULL; | |
| 70 PRArenaPool *arena; | |
| 71 SEC_PKCS7ContentInfo *contentInfo = NULL; | |
| 72 | |
| 73 arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE); | |
| 74 if (arena == NULL) { | |
| 75 return SECFailure; | |
| 76 } | |
| 77 | |
| 78 contentInfo = SEC_PKCS7DecodeItem(certsItem, NULL, NULL, NULL, NULL, NULL, | |
| 79 NULL, NULL); | |
| 80 if ( contentInfo == NULL ) { | |
| 81 goto loser; | |
| 82 } | |
| 83 | |
| 84 if ( SEC_PKCS7ContentType (contentInfo) != SEC_OID_NS_TYPE_CERT_SEQUENCE ) { | |
| 85 goto loser; | |
| 86 } | |
| 87 | |
| 88 | |
| 89 rv = SEC_QuickDERDecodeItem(arena, &rawCerts, SEC_CertSequenceTemplate, | |
| 90 contentInfo->content.data); | |
| 91 | |
| 92 if (rv != SECSuccess) { | |
| 93 goto loser; | |
| 94 } | |
| 95 | |
| 96 certs = rawCerts; | |
| 97 if ( certs ) { | |
| 98 count = 0; | |
| 99 | |
| 100 while ( *certs ) { | |
| 101 count++; | |
| 102 certs++; | |
| 103 } | |
| 104 rv = (* f)(arg, rawCerts, count); | |
| 105 } | |
| 106 | |
| 107 rv = SECSuccess; | |
| 108 | |
| 109 goto done; | |
| 110 loser: | |
| 111 rv = SECFailure; | |
| 112 | |
| 113 done: | |
| 114 if ( contentInfo ) { | |
| 115 SEC_PKCS7DestroyContentInfo(contentInfo); | |
| 116 } | |
| 117 | |
| 118 if ( arena ) { | |
| 119 PORT_FreeArena(arena, PR_FALSE); | |
| 120 } | |
| 121 | |
| 122 return(rv); | |
| 123 } | |
| 124 | |
| 125 CERTCertificate * | |
| 126 CERT_ConvertAndDecodeCertificate(char *certstr) | |
| 127 { | |
| 128 CERTCertificate *cert; | |
| 129 SECStatus rv; | |
| 130 SECItem der; | |
| 131 | |
| 132 rv = ATOB_ConvertAsciiToItem(&der, certstr); | |
| 133 if (rv != SECSuccess) | |
| 134 return NULL; | |
| 135 | |
| 136 cert = CERT_NewTempCertificate(CERT_GetDefaultCertDB(), | |
| 137 &der, NULL, PR_FALSE, PR_TRUE); | |
| 138 | |
| 139 PORT_Free(der.data); | |
| 140 return cert; | |
| 141 } | |
| 142 | |
| 143 static const char NS_CERT_HEADER[] = "-----BEGIN CERTIFICATE-----"; | |
| 144 static const char NS_CERT_TRAILER[] = "-----END CERTIFICATE-----"; | |
| 145 #define NS_CERT_HEADER_LEN ((sizeof NS_CERT_HEADER) - 1) | |
| 146 #define NS_CERT_TRAILER_LEN ((sizeof NS_CERT_TRAILER) - 1) | |
| 147 | |
| 148 /* | |
| 149 * read an old style ascii or binary certificate chain | |
| 150 */ | |
| 151 SECStatus | |
| 152 CERT_DecodeCertPackage(char *certbuf, | |
| 153 int certlen, | |
| 154 CERTImportCertificateFunc f, | |
| 155 void *arg) | |
| 156 { | |
| 157 unsigned char *cp; | |
| 158 unsigned char *bincert = NULL; | |
| 159 char * ascCert = NULL; | |
| 160 SECStatus rv; | |
| 161 | |
| 162 if ( certbuf == NULL ) { | |
| 163 PORT_SetError(SEC_ERROR_INVALID_ARGS); | |
| 164 return(SECFailure); | |
| 165 } | |
| 166 /* | |
| 167 * Make sure certlen is long enough to handle the longest possible | |
| 168 * reference in the code below: | |
| 169 * 0x30 0x84 l1 l2 l3 l4 + | |
| 170 * tag 9 o1 o2 o3 o4 o5 o6 o7 o8 o9 | |
| 171 * 6 + 11 = 17. 17 bytes is clearly too small to code any kind of | |
| 172 * certificate (a 128 bit ECC certificate contains at least an 8 byte | |
| 173 * key and a 16 byte signature, plus coding overhead). Typically a cert | |
| 174 * is much larger. So it's safe to require certlen to be at least 17 | |
| 175 * bytes. | |
| 176 */ | |
| 177 if (certlen < 17) { | |
| 178 PORT_SetError(SEC_ERROR_INPUT_LEN); | |
| 179 return(SECFailure); | |
| 180 } | |
| 181 | |
| 182 cp = (unsigned char *)certbuf; | |
| 183 | |
| 184 /* is a DER encoded certificate of some type? */ | |
| 185 if ( ( *cp & 0x1f ) == SEC_ASN1_SEQUENCE ) { | |
| 186 SECItem certitem; | |
| 187 SECItem *pcertitem = &certitem; | |
| 188 int seqLen, seqLenLen; | |
| 189 | |
| 190 cp++; | |
| 191 | |
| 192 if ( *cp & 0x80) { | |
| 193 /* Multibyte length */ | |
| 194 seqLenLen = cp[0] & 0x7f; | |
| 195 | |
| 196 switch (seqLenLen) { | |
| 197 case 4: | |
| 198 seqLen = ((unsigned long)cp[1]<<24) | | |
| 199 ((unsigned long)cp[2]<<16) | (cp[3]<<8) | cp[4]; | |
| 200 break; | |
| 201 case 3: | |
| 202 seqLen = ((unsigned long)cp[1]<<16) | (cp[2]<<8) | cp[3]; | |
| 203 break; | |
| 204 case 2: | |
| 205 seqLen = (cp[1]<<8) | cp[2]; | |
| 206 break; | |
| 207 case 1: | |
| 208 seqLen = cp[1]; | |
| 209 break; | |
| 210 case 0: | |
| 211 /* indefinite length */ | |
| 212 seqLen = 0; | |
| 213 break; | |
| 214 default: | |
| 215 goto notder; | |
| 216 } | |
| 217 cp += ( seqLenLen + 1 ); | |
| 218 | |
| 219 } else { | |
| 220 seqLenLen = 0; | |
| 221 seqLen = *cp; | |
| 222 cp++; | |
| 223 } | |
| 224 | |
| 225 /* check entire length if definite length */ | |
| 226 if ( seqLen || seqLenLen ) { | |
| 227 if ( certlen != ( seqLen + seqLenLen + 2 ) ) { | |
| 228 if (certlen > ( seqLen + seqLenLen + 2 )) | |
| 229 PORT_SetError(SEC_ERROR_EXTRA_INPUT); | |
| 230 else | |
| 231 PORT_SetError(SEC_ERROR_INPUT_LEN); | |
| 232 goto notder; | |
| 233 } | |
| 234 } | |
| 235 | |
| 236 /* check the type oid */ | |
| 237 if ( cp[0] == SEC_ASN1_OBJECT_ID ) { | |
| 238 SECOidData *oiddata; | |
| 239 SECItem oiditem; | |
| 240 /* XXX - assume DER encoding of OID len!! */ | |
| 241 oiditem.len = cp[1]; | |
| 242 /* if we add an oid below that is longer than 9 bytes, then we | |
| 243 * need to change the certlen check at the top of the function | |
| 244 * to prevent a buffer overflow | |
| 245 */ | |
| 246 if ( oiditem.len > 9 ) { | |
| 247 PORT_SetError(SEC_ERROR_UNRECOGNIZED_OID); | |
| 248 return(SECFailure); | |
| 249 } | |
| 250 oiditem.data = (unsigned char *)&cp[2]; | |
| 251 oiddata = SECOID_FindOID(&oiditem); | |
| 252 if ( oiddata == NULL ) { | |
| 253 return(SECFailure); | |
| 254 } | |
| 255 | |
| 256 certitem.data = (unsigned char*)certbuf; | |
| 257 certitem.len = certlen; | |
| 258 | |
| 259 switch ( oiddata->offset ) { | |
| 260 case SEC_OID_PKCS7_SIGNED_DATA: | |
| 261 return(SEC_ReadPKCS7Certs(&certitem, f, arg)); | |
| 262 break; | |
| 263 case SEC_OID_NS_TYPE_CERT_SEQUENCE: | |
| 264 return(SEC_ReadCertSequence(&certitem, f, arg)); | |
| 265 break; | |
| 266 default: | |
| 267 break; | |
| 268 } | |
| 269 | |
| 270 } else { | |
| 271 /* it had better be a certificate by now!! */ | |
| 272 certitem.data = (unsigned char*)certbuf; | |
| 273 certitem.len = certlen; | |
| 274 | |
| 275 rv = (* f)(arg, &pcertitem, 1); | |
| 276 return(rv); | |
| 277 } | |
| 278 } | |
| 279 | |
| 280 /* now look for a netscape base64 ascii encoded cert */ | |
| 281 notder: | |
| 282 { | |
| 283 unsigned char *certbegin = NULL; | |
| 284 unsigned char *certend = NULL; | |
| 285 char *pc; | |
| 286 int cl; | |
| 287 | |
| 288 /* Convert the ASCII data into a nul-terminated string */ | |
| 289 ascCert = (char *)PORT_Alloc(certlen + 1); | |
| 290 if (!ascCert) { | |
| 291 rv = SECFailure; | |
| 292 goto loser; | |
| 293 } | |
| 294 | |
| 295 PORT_Memcpy(ascCert, certbuf, certlen); | |
| 296 ascCert[certlen] = '\0'; | |
| 297 | |
| 298 pc = PORT_Strchr(ascCert, '\n'); /* find an EOL */ | |
| 299 if (!pc) { /* maybe this is a MAC file */ | |
| 300 pc = ascCert; | |
| 301 while (*pc && NULL != (pc = PORT_Strchr(pc, '\r'))) { | |
| 302 *pc++ = '\n'; | |
| 303 } | |
| 304 } | |
| 305 | |
| 306 cp = (unsigned char *)ascCert; | |
| 307 cl = certlen; | |
| 308 | |
| 309 /* find the beginning marker */ | |
| 310 while ( cl > NS_CERT_HEADER_LEN ) { | |
| 311 int found = 0; | |
| 312 if ( !PORT_Strncasecmp((char *)cp, NS_CERT_HEADER, | |
| 313 NS_CERT_HEADER_LEN) ) { | |
| 314 cl -= NS_CERT_HEADER_LEN; | |
| 315 cp += NS_CERT_HEADER_LEN; | |
| 316 found = 1; | |
| 317 } | |
| 318 | |
| 319 /* skip to next eol */ | |
| 320 while ( cl && ( *cp != '\n' )) { | |
| 321 cp++; | |
| 322 cl--; | |
| 323 } | |
| 324 | |
| 325 /* skip all blank lines */ | |
| 326 while ( cl && ( *cp == '\n' || *cp == '\r' )) { | |
| 327 cp++; | |
| 328 cl--; | |
| 329 } | |
| 330 if (cl && found) { | |
| 331 certbegin = cp; | |
| 332 break; | |
| 333 } | |
| 334 } | |
| 335 | |
| 336 if ( certbegin ) { | |
| 337 /* find the ending marker */ | |
| 338 while ( cl >= NS_CERT_TRAILER_LEN ) { | |
| 339 if ( !PORT_Strncasecmp((char *)cp, NS_CERT_TRAILER, | |
| 340 NS_CERT_TRAILER_LEN) ) { | |
| 341 certend = cp; | |
| 342 break; | |
| 343 } | |
| 344 | |
| 345 /* skip to next eol */ | |
| 346 while ( cl && ( *cp != '\n' )) { | |
| 347 cp++; | |
| 348 cl--; | |
| 349 } | |
| 350 | |
| 351 /* skip all blank lines */ | |
| 352 while ( cl && ( *cp == '\n' || *cp == '\r' )) { | |
| 353 cp++; | |
| 354 cl--; | |
| 355 } | |
| 356 } | |
| 357 } | |
| 358 | |
| 359 if ( certbegin && certend ) { | |
| 360 unsigned int binLen; | |
| 361 | |
| 362 *certend = 0; | |
| 363 /* convert to binary */ | |
| 364 bincert = ATOB_AsciiToData((char *)certbegin, &binLen); | |
| 365 if (!bincert) { | |
| 366 rv = SECFailure; | |
| 367 goto loser; | |
| 368 } | |
| 369 | |
| 370 /* now recurse to decode the binary */ | |
| 371 rv = CERT_DecodeCertPackage((char *)bincert, binLen, f, arg); | |
| 372 | |
| 373 } else { | |
| 374 PORT_SetError(SEC_ERROR_BAD_DER); | |
| 375 rv = SECFailure; | |
| 376 } | |
| 377 } | |
| 378 | |
| 379 loser: | |
| 380 | |
| 381 if ( bincert ) { | |
| 382 PORT_Free(bincert); | |
| 383 } | |
| 384 | |
| 385 if ( ascCert ) { | |
| 386 PORT_Free(ascCert); | |
| 387 } | |
| 388 | |
| 389 return(rv); | |
| 390 } | |
| 391 | |
| 392 typedef struct { | |
| 393 PRArenaPool *arena; | |
| 394 SECItem cert; | |
| 395 } collect_args; | |
| 396 | |
| 397 static SECStatus | |
| 398 collect_certs(void *arg, SECItem **certs, int numcerts) | |
| 399 { | |
| 400 SECStatus rv; | |
| 401 collect_args *collectArgs; | |
| 402 | |
| 403 collectArgs = (collect_args *)arg; | |
| 404 | |
| 405 rv = SECITEM_CopyItem(collectArgs->arena, &collectArgs->cert, *certs); | |
| 406 | |
| 407 return(rv); | |
| 408 } | |
| 409 | |
| 410 | |
| 411 /* | |
| 412 * read an old style ascii or binary certificate | |
| 413 */ | |
| 414 CERTCertificate * | |
| 415 CERT_DecodeCertFromPackage(char *certbuf, int certlen) | |
| 416 { | |
| 417 collect_args collectArgs; | |
| 418 SECStatus rv; | |
| 419 CERTCertificate *cert = NULL; | |
| 420 | |
| 421 collectArgs.arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE); | |
| 422 | |
| 423 rv = CERT_DecodeCertPackage(certbuf, certlen, collect_certs, | |
| 424 (void *)&collectArgs); | |
| 425 if ( rv == SECSuccess ) { | |
| 426 cert = CERT_NewTempCertificate(CERT_GetDefaultCertDB(), | |
| 427 &collectArgs.cert, NULL, | |
| 428 PR_FALSE, PR_TRUE); | |
| 429 } | |
| 430 | |
| 431 PORT_FreeArena(collectArgs.arena, PR_FALSE); | |
| 432 | |
| 433 return(cert); | |
| 434 } | |
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Chromium Code Reviews
Issue 14249009:
Change the NSS and NSPR source tree to the new directory structure to be (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/deps/third_party/nss/