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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 * pkix_ocspchecker.c | |
| 6 * | |
| 7 * OcspChecker Object Functions | |
| 8 * | |
| 9 */ | |
| 10 | |
| 11 #include "pkix_ocspchecker.h" | |
| 12 #include "pkix_pl_ocspcertid.h" | |
| 13 #include "pkix_error.h" | |
| 14 | |
| 15 | |
| 16 /* --Private-Data-and-Types--------------------------------------- */ | |
| 17 | |
| 18 typedef struct pkix_OcspCheckerStruct { | |
| 19 /* RevocationMethod is the super class of OcspChecker. */ | |
| 20 pkix_RevocationMethod method; | |
| 21 PKIX_PL_VerifyCallback certVerifyFcn; | |
| 22 } pkix_OcspChecker; | |
| 23 | |
| 24 /* --Private-Functions-------------------------------------------- */ | |
| 25 | |
| 26 /* | |
| 27 * FUNCTION: pkix_OcspChecker_Destroy | |
| 28 * (see comments for PKIX_PL_DestructorCallback in pkix_pl_system.h) | |
| 29 */ | |
| 30 static PKIX_Error * | |
| 31 pkix_OcspChecker_Destroy( | |
| 32 PKIX_PL_Object *object, | |
| 33 void *plContext) | |
| 34 { | |
| 35 return NULL; | |
| 36 } | |
| 37 | |
| 38 /* | |
| 39 * FUNCTION: pkix_OcspChecker_RegisterSelf | |
| 40 * DESCRIPTION: | |
| 41 * Registers PKIX_OCSPCHECKER_TYPE and its related functions with | |
| 42 * systemClasses[] | |
| 43 * THREAD SAFETY: | |
| 44 * Not Thread Safe - for performance and complexity reasons | |
| 45 * | |
| 46 * Since this function is only called by PKIX_PL_Initialize, which should | |
| 47 * only be called once, it is acceptable that this function is not | |
| 48 * thread-safe. | |
| 49 */ | |
| 50 PKIX_Error * | |
| 51 pkix_OcspChecker_RegisterSelf(void *plContext) | |
| 52 { | |
| 53 extern pkix_ClassTable_Entry systemClasses[PKIX_NUMTYPES]; | |
| 54 pkix_ClassTable_Entry* entry = &systemClasses[PKIX_OCSPCHECKER_TYPE]; | |
| 55 | |
| 56 PKIX_ENTER(OCSPCHECKER, "pkix_OcspChecker_RegisterSelf"); | |
| 57 | |
| 58 entry->description = "OcspChecker"; | |
| 59 entry->typeObjectSize = sizeof(pkix_OcspChecker); | |
| 60 entry->destructor = pkix_OcspChecker_Destroy; | |
| 61 | |
| 62 PKIX_RETURN(OCSPCHECKER); | |
| 63 } | |
| 64 | |
| 65 | |
| 66 /* | |
| 67 * FUNCTION: pkix_OcspChecker_Create | |
| 68 */ | |
| 69 PKIX_Error * | |
| 70 pkix_OcspChecker_Create(PKIX_RevocationMethodType methodType, | |
| 71 PKIX_UInt32 flags, | |
| 72 PKIX_UInt32 priority, | |
| 73 pkix_LocalRevocationCheckFn localRevChecker, | |
| 74 pkix_ExternalRevocationCheckFn externalRevChecker, | |
| 75 PKIX_PL_VerifyCallback verifyFn, | |
| 76 pkix_RevocationMethod **pChecker, | |
| 77 void *plContext) | |
| 78 { | |
| 79 pkix_OcspChecker *method = NULL; | |
| 80 | |
| 81 PKIX_ENTER(OCSPCHECKER, "pkix_OcspChecker_Create"); | |
| 82 PKIX_NULLCHECK_ONE(pChecker); | |
| 83 | |
| 84 PKIX_CHECK(PKIX_PL_Object_Alloc | |
| 85 (PKIX_OCSPCHECKER_TYPE, | |
| 86 sizeof (pkix_OcspChecker), | |
| 87 (PKIX_PL_Object **)&method, | |
| 88 plContext), | |
| 89 PKIX_COULDNOTCREATECERTCHAINCHECKEROBJECT); | |
| 90 | |
| 91 pkixErrorResult = pkix_RevocationMethod_Init( | |
| 92 (pkix_RevocationMethod*)method, methodType, flags, priority, | |
| 93 localRevChecker, externalRevChecker, plContext); | |
| 94 if (pkixErrorResult) { | |
| 95 goto cleanup; | |
| 96 } | |
| 97 method->certVerifyFcn = (PKIX_PL_VerifyCallback)verifyFn; | |
| 98 | |
| 99 *pChecker = (pkix_RevocationMethod*)method; | |
| 100 method = NULL; | |
| 101 | |
| 102 cleanup: | |
| 103 PKIX_DECREF(method); | |
| 104 | |
| 105 PKIX_RETURN(OCSPCHECKER); | |
| 106 } | |
| 107 | |
| 108 /* | |
| 109 * FUNCTION: pkix_OcspChecker_MapResultCodeToRevStatus | |
| 110 */ | |
| 111 PKIX_RevocationStatus | |
| 112 pkix_OcspChecker_MapResultCodeToRevStatus(SECErrorCodes resultCode) | |
| 113 { | |
| 114 switch (resultCode) { | |
| 115 case SEC_ERROR_REVOKED_CERTIFICATE: | |
| 116 return PKIX_RevStatus_Revoked; | |
| 117 default: | |
| 118 return PKIX_RevStatus_NoInfo; | |
| 119 } | |
| 120 } | |
| 121 | |
| 122 /* --Public-Functions--------------------------------------------- */ | |
| 123 | |
| 124 /* | |
| 125 * FUNCTION: pkix_OcspChecker_Check (see comments in pkix_checker.h) | |
| 126 */ | |
| 127 | |
| 128 /* | |
| 129 * The OCSPChecker is created in an idle state, and remains in this state until | |
| 130 * either (a) the default Responder has been set and enabled, and a Check | |
| 131 * request is received with no responder specified, or (b) a Check request is | |
| 132 * received with a specified responder. A request message is constructed and | |
| 133 * given to the HttpClient. If non-blocking I/O is used the client may return | |
| 134 * with WOULDBLOCK, in which case the OCSPChecker returns the WOULDBLOCK | |
| 135 * condition to its caller in turn. On a subsequent call the I/O is resumed. | |
| 136 * When a response is received it is decoded and the results provided to the | |
| 137 * caller. | |
| 138 * | |
| 139 */ | |
| 140 PKIX_Error * | |
| 141 pkix_OcspChecker_CheckLocal( | |
| 142 PKIX_PL_Cert *cert, | |
| 143 PKIX_PL_Cert *issuer, | |
| 144 PKIX_PL_Date *date, | |
| 145 pkix_RevocationMethod *checkerObject, | |
| 146 PKIX_ProcessingParams *procParams, | |
| 147 PKIX_UInt32 methodFlags, | |
| 148 PKIX_Boolean chainVerificationState, | |
| 149 PKIX_RevocationStatus *pRevStatus, | |
| 150 CERTCRLEntryReasonCode *pReasonCode, | |
| 151 void *plContext) | |
| 152 { | |
| 153 PKIX_PL_OcspCertID *cid = NULL; | |
| 154 PKIX_Boolean hasFreshStatus = PKIX_FALSE; | |
| 155 PKIX_Boolean statusIsGood = PKIX_FALSE; | |
| 156 SECErrorCodes resultCode = SEC_ERROR_REVOKED_CERTIFICATE_OCSP; | |
| 157 PKIX_RevocationStatus revStatus = PKIX_RevStatus_NoInfo; | |
| 158 | |
| 159 PKIX_ENTER(OCSPCHECKER, "pkix_OcspChecker_CheckLocal"); | |
| 160 | |
| 161 PKIX_CHECK( | |
| 162 PKIX_PL_OcspCertID_Create(cert, NULL, &cid, | |
| 163 plContext), | |
| 164 PKIX_OCSPCERTIDCREATEFAILED); | |
| 165 if (!cid) { | |
| 166 goto cleanup; | |
| 167 } | |
| 168 | |
| 169 PKIX_CHECK( | |
| 170 PKIX_PL_OcspCertID_GetFreshCacheStatus(cid, date, | |
| 171 &hasFreshStatus, | |
| 172 &statusIsGood, | |
| 173 &resultCode, | |
| 174 plContext), | |
| 175 PKIX_OCSPCERTIDGETFRESHCACHESTATUSFAILED); | |
| 176 if (hasFreshStatus) { | |
| 177 if (statusIsGood) { | |
| 178 revStatus = PKIX_RevStatus_Success; | |
| 179 resultCode = 0; | |
| 180 } else { | |
| 181 revStatus = pkix_OcspChecker_MapResultCodeToRevStatus(resultCode
); | |
| 182 } | |
| 183 } | |
| 184 | |
| 185 cleanup: | |
| 186 *pRevStatus = revStatus; | |
| 187 | |
| 188 /* ocsp carries only tree statuses: good, bad, and unknown. | |
| 189 * revStatus is used to pass them. reasonCode is always set | |
| 190 * to be unknown. */ | |
| 191 *pReasonCode = crlEntryReasonUnspecified; | |
| 192 PKIX_DECREF(cid); | |
| 193 | |
| 194 PKIX_RETURN(OCSPCHECKER); | |
| 195 } | |
| 196 | |
| 197 | |
| 198 /* | |
| 199 * The OCSPChecker is created in an idle state, and remains in this state until | |
| 200 * either (a) the default Responder has been set and enabled, and a Check | |
| 201 * request is received with no responder specified, or (b) a Check request is | |
| 202 * received with a specified responder. A request message is constructed and | |
| 203 * given to the HttpClient. When a response is received it is decoded and the | |
| 204 * results provided to the caller. | |
| 205 * | |
| 206 * During the most recent enhancement of this function, it has been found that | |
| 207 * it doesn't correctly implement non-blocking I/O. | |
| 208 * | |
| 209 * The nbioContext is used in two places, for "response-obtaining" and | |
| 210 * for "response-verification". | |
| 211 * | |
| 212 * However, if this function gets called to resume, it always | |
| 213 * repeats the "request creation" and "response fetching" steps! | |
| 214 * As a result, the earlier operation is never resumed. | |
| 215 */ | |
| 216 PKIX_Error * | |
| 217 pkix_OcspChecker_CheckExternal( | |
| 218 PKIX_PL_Cert *cert, | |
| 219 PKIX_PL_Cert *issuer, | |
| 220 PKIX_PL_Date *date, | |
| 221 pkix_RevocationMethod *checkerObject, | |
| 222 PKIX_ProcessingParams *procParams, | |
| 223 PKIX_UInt32 methodFlags, | |
| 224 PKIX_RevocationStatus *pRevStatus, | |
| 225 CERTCRLEntryReasonCode *pReasonCode, | |
| 226 void **pNBIOContext, | |
| 227 void *plContext) | |
| 228 { | |
| 229 SECErrorCodes resultCode = SEC_ERROR_REVOKED_CERTIFICATE_OCSP; | |
| 230 PKIX_Boolean uriFound = PKIX_FALSE; | |
| 231 PKIX_Boolean passed = PKIX_TRUE; | |
| 232 pkix_OcspChecker *checker = NULL; | |
| 233 PKIX_PL_OcspCertID *cid = NULL; | |
| 234 PKIX_PL_OcspRequest *request = NULL; | |
| 235 PKIX_PL_OcspResponse *response = NULL; | |
| 236 PKIX_PL_Date *validity = NULL; | |
| 237 PKIX_RevocationStatus revStatus = PKIX_RevStatus_NoInfo; | |
| 238 void *nbioContext = NULL; | |
| 239 enum { stageGET, stagePOST } currentStage; | |
| 240 PRBool retry = PR_FALSE; | |
| 241 | |
| 242 PKIX_ENTER(OCSPCHECKER, "pkix_OcspChecker_CheckExternal"); | |
| 243 | |
| 244 PKIX_CHECK( | |
| 245 pkix_CheckType((PKIX_PL_Object*)checkerObject, | |
| 246 PKIX_OCSPCHECKER_TYPE, plContext), | |
| 247 PKIX_OBJECTNOTOCSPCHECKER); | |
| 248 | |
| 249 checker = (pkix_OcspChecker *)checkerObject; | |
| 250 | |
| 251 PKIX_CHECK( | |
| 252 PKIX_PL_OcspCertID_Create(cert, NULL, &cid, | |
| 253 plContext), | |
| 254 PKIX_OCSPCERTIDCREATEFAILED); | |
| 255 | |
| 256 /* create request */ | |
| 257 PKIX_CHECK( | |
| 258 pkix_pl_OcspRequest_Create(cert, cid, validity, NULL, | |
| 259 methodFlags, &uriFound, &request, | |
| 260 plContext), | |
| 261 PKIX_OCSPREQUESTCREATEFAILED); | |
| 262 | |
| 263 if (uriFound == PKIX_FALSE) { | |
| 264 /* no caching for certs lacking URI */ | |
| 265 resultCode = 0; | |
| 266 goto cleanup; | |
| 267 } | |
| 268 | |
| 269 if (methodFlags & CERT_REV_M_FORCE_POST_METHOD_FOR_OCSP) { | |
| 270 /* Do not try HTTP GET, only HTTP POST */ | |
| 271 currentStage = stagePOST; | |
| 272 } else { | |
| 273 /* Try HTTP GET first, falling back to POST */ | |
| 274 currentStage = stageGET; | |
| 275 } | |
| 276 | |
| 277 do { | |
| 278 const char *method; | |
| 279 passed = PKIX_TRUE; | |
| 280 | |
| 281 retry = PR_FALSE; | |
| 282 if (currentStage == stageGET) { | |
| 283 method = "GET"; | |
| 284 } else { | |
| 285 PORT_Assert(currentStage == stagePOST); | |
| 286 method = "POST"; | |
| 287 } | |
| 288 | |
| 289 /* send request and create a response object */ | |
| 290 PKIX_CHECK_NO_GOTO( | |
| 291 pkix_pl_OcspResponse_Create(request, method, NULL, | |
| 292 checker->certVerifyFcn, | |
| 293 &nbioContext, | |
| 294 &response, | |
| 295 plContext), | |
| 296 PKIX_OCSPRESPONSECREATEFAILED); | |
| 297 | |
| 298 if (pkixErrorResult) { | |
| 299 passed = PKIX_FALSE; | |
| 300 } | |
| 301 | |
| 302 if (passed && nbioContext != 0) { | |
| 303 *pNBIOContext = nbioContext; | |
| 304 goto cleanup; | |
| 305 } | |
| 306 | |
| 307 if (passed){ | |
| 308 PKIX_CHECK_NO_GOTO( | |
| 309 pkix_pl_OcspResponse_Decode(response, &passed, | |
| 310 &resultCode, plContext), | |
| 311 PKIX_OCSPRESPONSEDECODEFAILED); | |
| 312 if (pkixErrorResult) { | |
| 313 passed = PKIX_FALSE; | |
| 314 } | |
| 315 } | |
| 316 | |
| 317 if (passed){ | |
| 318 PKIX_CHECK_NO_GOTO( | |
| 319 pkix_pl_OcspResponse_GetStatus(response, &passed, | |
| 320 &resultCode, plContex
t), | |
| 321 PKIX_OCSPRESPONSEGETSTATUSRETURNEDANERROR); | |
| 322 if (pkixErrorResult) { | |
| 323 passed = PKIX_FALSE; | |
| 324 } | |
| 325 } | |
| 326 | |
| 327 if (passed){ | |
| 328 PKIX_CHECK_NO_GOTO( | |
| 329 pkix_pl_OcspResponse_VerifySignature(response, cert, | |
| 330 procParams, &pa
ssed, | |
| 331 &nbioContext, p
lContext), | |
| 332 PKIX_OCSPRESPONSEVERIFYSIGNATUREFAILED); | |
| 333 if (pkixErrorResult) { | |
| 334 passed = PKIX_FALSE; | |
| 335 } else { | |
| 336 if (nbioContext != 0) { | |
| 337 *pNBIOContext = nbioContext; | |
| 338 goto cleanup; | |
| 339 } | |
| 340 } | |
| 341 } | |
| 342 | |
| 343 if (!passed && currentStage == stagePOST) { | |
| 344 /* We won't retry a POST failure, so it's final. | |
| 345 * Because the following block with its call to | |
| 346 * pkix_pl_OcspResponse_GetStatusForCert | |
| 347 * will take care of caching good or bad state, | |
| 348 * but we only execute that next block if there hasn't | |
| 349 * been a failure yet, we must cache the POST | |
| 350 * failure now. | |
| 351 */ | |
| 352 | |
| 353 if (cid && cid->certID) { | |
| 354 /* Caching MIGHT consume the cid. */ | |
| 355 PKIX_Error *err; | |
| 356 err = PKIX_PL_OcspCertID_RememberOCSPProcessingF
ailure( | |
| 357 cid, plContext); | |
| 358 if (err) { | |
| 359 PKIX_PL_Object_DecRef((PKIX_PL_Object*)e
rr, plContext); | |
| 360 } | |
| 361 } | |
| 362 } | |
| 363 | |
| 364 if (passed){ | |
| 365 PKIX_Boolean allowCachingOfFailures = | |
| 366 (currentStage == stagePOST) ? PKIX_TRUE : PKIX_F
ALSE; | |
| 367 | |
| 368 PKIX_CHECK_NO_GOTO( | |
| 369 pkix_pl_OcspResponse_GetStatusForCert(cid, response, | |
| 370 allowCachingOf
Failures, | |
| 371 date, | |
| 372 &passed, &resu
ltCode, | |
| 373 plContext), | |
| 374 PKIX_OCSPRESPONSEGETSTATUSFORCERTFAILED); | |
| 375 if (pkixErrorResult) { | |
| 376 passed = PKIX_FALSE; | |
| 377 } else if (passed == PKIX_FALSE) { | |
| 378 revStatus = pkix_OcspChecker_MapResultCodeToRevS
tatus(resultCode); | |
| 379 } else { | |
| 380 revStatus = PKIX_RevStatus_Success; | |
| 381 } | |
| 382 } | |
| 383 | |
| 384 if (currentStage == stageGET && revStatus != PKIX_RevStatus_Succ
ess && | |
| 385 revStatus != PKIX_RevStatus_Revo
ked) { | |
| 386 /* we'll retry */ | |
| 387 PKIX_DECREF(response); | |
| 388 retry = PR_TRUE; | |
| 389 currentStage = stagePOST; | |
| 390 revStatus = PKIX_RevStatus_NoInfo; | |
| 391 if (pkixErrorResult) { | |
| 392 PKIX_PL_Object_DecRef((PKIX_PL_Object*)pkixError
Result, | |
| 393 plContext); | |
| 394 pkixErrorResult = NULL; | |
| 395 } | |
| 396 } | |
| 397 } while (retry); | |
| 398 | |
| 399 cleanup: | |
| 400 if (revStatus == PKIX_RevStatus_NoInfo && (uriFound || | |
| 401 methodFlags & PKIX_REV_M_REQUIRE_INFO_ON_MISSING_SOURCE) && | |
| 402 methodFlags & PKIX_REV_M_FAIL_ON_MISSING_FRESH_INFO) { | |
| 403 revStatus = PKIX_RevStatus_Revoked; | |
| 404 } | |
| 405 *pRevStatus = revStatus; | |
| 406 | |
| 407 /* ocsp carries only three statuses: good, bad, and unknown. | |
| 408 * revStatus is used to pass them. reasonCode is always set | |
| 409 * to be unknown. */ | |
| 410 *pReasonCode = crlEntryReasonUnspecified; | |
| 411 | |
| 412 PKIX_DECREF(cid); | |
| 413 PKIX_DECREF(request); | |
| 414 PKIX_DECREF(response); | |
| 415 | |
| 416 PKIX_RETURN(OCSPCHECKER); | |
| 417 } | |
| 418 | |
| 419 | |
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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