Tue, 06 Jan 2015 21:39:09 +0100
Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.
michael@0 | 1 | /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ |
michael@0 | 2 | /* vim: set ts=8 sts=2 et sw=2 tw=80: */ |
michael@0 | 3 | /* Copyright 2013 Mozilla Foundation |
michael@0 | 4 | * |
michael@0 | 5 | * Licensed under the Apache License, Version 2.0 (the "License"); |
michael@0 | 6 | * you may not use this file except in compliance with the License. |
michael@0 | 7 | * You may obtain a copy of the License at |
michael@0 | 8 | * |
michael@0 | 9 | * http://www.apache.org/licenses/LICENSE-2.0 |
michael@0 | 10 | * |
michael@0 | 11 | * Unless required by applicable law or agreed to in writing, software |
michael@0 | 12 | * distributed under the License is distributed on an "AS IS" BASIS, |
michael@0 | 13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
michael@0 | 14 | * See the License for the specific language governing permissions and |
michael@0 | 15 | * limitations under the License. |
michael@0 | 16 | */ |
michael@0 | 17 | |
michael@0 | 18 | #include "pkixcheck.h" |
michael@0 | 19 | #include "pkixder.h" |
michael@0 | 20 | #include "pkixtestutil.h" |
michael@0 | 21 | |
michael@0 | 22 | #include "cryptohi.h" |
michael@0 | 23 | #include "hasht.h" |
michael@0 | 24 | #include "pk11pub.h" |
michael@0 | 25 | #include "prinit.h" |
michael@0 | 26 | #include "secder.h" |
michael@0 | 27 | |
michael@0 | 28 | namespace mozilla { namespace pkix { namespace test { |
michael@0 | 29 | |
michael@0 | 30 | class Output |
michael@0 | 31 | { |
michael@0 | 32 | public: |
michael@0 | 33 | Output() |
michael@0 | 34 | : numItems(0) |
michael@0 | 35 | , length(0) |
michael@0 | 36 | { |
michael@0 | 37 | } |
michael@0 | 38 | |
michael@0 | 39 | // Makes a shallow copy of the input item. All input items must have a |
michael@0 | 40 | // lifetime that extends at least to where Squash is called. |
michael@0 | 41 | der::Result Add(const SECItem* item) |
michael@0 | 42 | { |
michael@0 | 43 | PR_ASSERT(item); |
michael@0 | 44 | PR_ASSERT(item->data); |
michael@0 | 45 | |
michael@0 | 46 | if (numItems >= MaxSequenceItems) { |
michael@0 | 47 | return der::Fail(SEC_ERROR_INVALID_ARGS); |
michael@0 | 48 | } |
michael@0 | 49 | if (length + item->len > 65535) { |
michael@0 | 50 | return der::Fail(SEC_ERROR_INVALID_ARGS); |
michael@0 | 51 | } |
michael@0 | 52 | |
michael@0 | 53 | contents[numItems] = item; |
michael@0 | 54 | numItems++; |
michael@0 | 55 | length += item->len; |
michael@0 | 56 | return der::Success; |
michael@0 | 57 | } |
michael@0 | 58 | |
michael@0 | 59 | SECItem* Squash(PLArenaPool* arena, uint8_t tag) |
michael@0 | 60 | { |
michael@0 | 61 | PR_ASSERT(arena); |
michael@0 | 62 | |
michael@0 | 63 | size_t lengthLength = length < 128 ? 1 |
michael@0 | 64 | : length < 256 ? 2 |
michael@0 | 65 | : 3; |
michael@0 | 66 | size_t totalLength = 1 + lengthLength + length; |
michael@0 | 67 | SECItem* output = SECITEM_AllocItem(arena, nullptr, totalLength); |
michael@0 | 68 | if (!output) { |
michael@0 | 69 | return nullptr; |
michael@0 | 70 | } |
michael@0 | 71 | uint8_t* d = output->data; |
michael@0 | 72 | *d++ = tag; |
michael@0 | 73 | EncodeLength(d, length, lengthLength); |
michael@0 | 74 | d += lengthLength; |
michael@0 | 75 | for (size_t i = 0; i < numItems; i++) { |
michael@0 | 76 | memcpy(d, contents[i]->data, contents[i]->len); |
michael@0 | 77 | d += contents[i]->len; |
michael@0 | 78 | } |
michael@0 | 79 | return output; |
michael@0 | 80 | } |
michael@0 | 81 | |
michael@0 | 82 | private: |
michael@0 | 83 | void |
michael@0 | 84 | EncodeLength(uint8_t* data, size_t length, size_t lengthLength) |
michael@0 | 85 | { |
michael@0 | 86 | switch (lengthLength) { |
michael@0 | 87 | case 1: |
michael@0 | 88 | data[0] = length; |
michael@0 | 89 | break; |
michael@0 | 90 | case 2: |
michael@0 | 91 | data[0] = 0x81; |
michael@0 | 92 | data[1] = length; |
michael@0 | 93 | break; |
michael@0 | 94 | case 3: |
michael@0 | 95 | data[0] = 0x82; |
michael@0 | 96 | data[1] = length / 256; |
michael@0 | 97 | data[2] = length % 256; |
michael@0 | 98 | break; |
michael@0 | 99 | default: |
michael@0 | 100 | PR_NOT_REACHED("EncodeLength: bad lengthLength"); |
michael@0 | 101 | PR_Abort(); |
michael@0 | 102 | } |
michael@0 | 103 | } |
michael@0 | 104 | |
michael@0 | 105 | static const size_t MaxSequenceItems = 5; |
michael@0 | 106 | const SECItem* contents[MaxSequenceItems]; |
michael@0 | 107 | size_t numItems; |
michael@0 | 108 | size_t length; |
michael@0 | 109 | |
michael@0 | 110 | Output(const Output&) /* = delete */; |
michael@0 | 111 | void operator=(const Output&) /* = delete */; |
michael@0 | 112 | }; |
michael@0 | 113 | |
michael@0 | 114 | OCSPResponseContext::OCSPResponseContext(PLArenaPool* arena, |
michael@0 | 115 | CERTCertificate* cert, |
michael@0 | 116 | PRTime time) |
michael@0 | 117 | : arena(arena) |
michael@0 | 118 | , cert(CERT_DupCertificate(cert)) |
michael@0 | 119 | , issuerCert(nullptr) |
michael@0 | 120 | , signerCert(nullptr) |
michael@0 | 121 | , responseStatus(0) |
michael@0 | 122 | , skipResponseBytes(false) |
michael@0 | 123 | , producedAt(time) |
michael@0 | 124 | , thisUpdate(time) |
michael@0 | 125 | , nextUpdate(time + 10 * PR_USEC_PER_SEC) |
michael@0 | 126 | , includeNextUpdate(true) |
michael@0 | 127 | , certIDHashAlg(SEC_OID_SHA1) |
michael@0 | 128 | , certStatus(0) |
michael@0 | 129 | , revocationTime(0) |
michael@0 | 130 | , badSignature(false) |
michael@0 | 131 | , responderIDType(ByKeyHash) |
michael@0 | 132 | , extensions(nullptr) |
michael@0 | 133 | , includeEmptyExtensions(false) |
michael@0 | 134 | { |
michael@0 | 135 | for (size_t i = 0; i < MaxIncludedCertificates; i++) { |
michael@0 | 136 | includedCertificates[i] = nullptr; |
michael@0 | 137 | } |
michael@0 | 138 | } |
michael@0 | 139 | |
michael@0 | 140 | static SECItem* ResponseBytes(OCSPResponseContext& context); |
michael@0 | 141 | static SECItem* BasicOCSPResponse(OCSPResponseContext& context); |
michael@0 | 142 | static SECItem* ResponseData(OCSPResponseContext& context); |
michael@0 | 143 | static SECItem* ResponderID(OCSPResponseContext& context); |
michael@0 | 144 | static SECItem* KeyHash(OCSPResponseContext& context); |
michael@0 | 145 | static SECItem* SingleResponse(OCSPResponseContext& context); |
michael@0 | 146 | static SECItem* CertID(OCSPResponseContext& context); |
michael@0 | 147 | static SECItem* CertStatus(OCSPResponseContext& context); |
michael@0 | 148 | static SECItem* Certificates(OCSPResponseContext& context); |
michael@0 | 149 | |
michael@0 | 150 | static SECItem* |
michael@0 | 151 | EncodeNested(PLArenaPool* arena, uint8_t tag, SECItem* inner) |
michael@0 | 152 | { |
michael@0 | 153 | Output output; |
michael@0 | 154 | if (output.Add(inner) != der::Success) { |
michael@0 | 155 | return nullptr; |
michael@0 | 156 | } |
michael@0 | 157 | return output.Squash(arena, tag); |
michael@0 | 158 | } |
michael@0 | 159 | |
michael@0 | 160 | // A return value of 0 is an error, but this should never happen in practice |
michael@0 | 161 | // because this function aborts in that case. |
michael@0 | 162 | static size_t |
michael@0 | 163 | HashAlgorithmToLength(SECOidTag hashAlg) |
michael@0 | 164 | { |
michael@0 | 165 | switch (hashAlg) { |
michael@0 | 166 | case SEC_OID_SHA1: |
michael@0 | 167 | return SHA1_LENGTH; |
michael@0 | 168 | case SEC_OID_SHA256: |
michael@0 | 169 | return SHA256_LENGTH; |
michael@0 | 170 | case SEC_OID_SHA384: |
michael@0 | 171 | return SHA384_LENGTH; |
michael@0 | 172 | case SEC_OID_SHA512: |
michael@0 | 173 | return SHA512_LENGTH; |
michael@0 | 174 | default: |
michael@0 | 175 | PR_NOT_REACHED("HashAlgorithmToLength: bad hashAlg"); |
michael@0 | 176 | PR_Abort(); |
michael@0 | 177 | } |
michael@0 | 178 | return 0; |
michael@0 | 179 | } |
michael@0 | 180 | |
michael@0 | 181 | static SECItem* |
michael@0 | 182 | HashedOctetString(PLArenaPool* arena, const SECItem* bytes, SECOidTag hashAlg) |
michael@0 | 183 | { |
michael@0 | 184 | size_t hashLen = HashAlgorithmToLength(hashAlg); |
michael@0 | 185 | if (hashLen == 0) { |
michael@0 | 186 | return nullptr; |
michael@0 | 187 | } |
michael@0 | 188 | SECItem* hashBuf = SECITEM_AllocItem(arena, nullptr, hashLen); |
michael@0 | 189 | if (!hashBuf) { |
michael@0 | 190 | return nullptr; |
michael@0 | 191 | } |
michael@0 | 192 | if (PK11_HashBuf(hashAlg, hashBuf->data, bytes->data, bytes->len) |
michael@0 | 193 | != SECSuccess) { |
michael@0 | 194 | return nullptr; |
michael@0 | 195 | } |
michael@0 | 196 | |
michael@0 | 197 | return EncodeNested(arena, der::OCTET_STRING, hashBuf); |
michael@0 | 198 | } |
michael@0 | 199 | |
michael@0 | 200 | static SECItem* |
michael@0 | 201 | KeyHashHelper(PLArenaPool* arena, const CERTCertificate* cert) |
michael@0 | 202 | { |
michael@0 | 203 | // We only need a shallow copy here. |
michael@0 | 204 | SECItem spk = cert->subjectPublicKeyInfo.subjectPublicKey; |
michael@0 | 205 | DER_ConvertBitString(&spk); // bits to bytes |
michael@0 | 206 | return HashedOctetString(arena, &spk, SEC_OID_SHA1); |
michael@0 | 207 | } |
michael@0 | 208 | |
michael@0 | 209 | static SECItem* |
michael@0 | 210 | AlgorithmIdentifier(PLArenaPool* arena, SECOidTag algTag) |
michael@0 | 211 | { |
michael@0 | 212 | SECAlgorithmIDStr aid; |
michael@0 | 213 | aid.algorithm.data = nullptr; |
michael@0 | 214 | aid.algorithm.len = 0; |
michael@0 | 215 | aid.parameters.data = nullptr; |
michael@0 | 216 | aid.parameters.len = 0; |
michael@0 | 217 | if (SECOID_SetAlgorithmID(arena, &aid, algTag, nullptr) != SECSuccess) { |
michael@0 | 218 | return nullptr; |
michael@0 | 219 | } |
michael@0 | 220 | static const SEC_ASN1Template algorithmIDTemplate[] = { |
michael@0 | 221 | { SEC_ASN1_SEQUENCE, 0, NULL, sizeof(SECAlgorithmID) }, |
michael@0 | 222 | { SEC_ASN1_OBJECT_ID, offsetof(SECAlgorithmID, algorithm) }, |
michael@0 | 223 | { SEC_ASN1_OPTIONAL | SEC_ASN1_ANY, offsetof(SECAlgorithmID, parameters) }, |
michael@0 | 224 | { 0 } |
michael@0 | 225 | }; |
michael@0 | 226 | SECItem* algorithmID = SEC_ASN1EncodeItem(arena, nullptr, &aid, |
michael@0 | 227 | algorithmIDTemplate); |
michael@0 | 228 | return algorithmID; |
michael@0 | 229 | } |
michael@0 | 230 | |
michael@0 | 231 | static SECItem* |
michael@0 | 232 | PRTimeToEncodedTime(PLArenaPool* arena, PRTime time) |
michael@0 | 233 | { |
michael@0 | 234 | SECItem derTime; |
michael@0 | 235 | if (DER_TimeToGeneralizedTimeArena(arena, &derTime, time) != SECSuccess) { |
michael@0 | 236 | return nullptr; |
michael@0 | 237 | } |
michael@0 | 238 | return EncodeNested(arena, der::GENERALIZED_TIME, &derTime); |
michael@0 | 239 | } |
michael@0 | 240 | |
michael@0 | 241 | SECItem* |
michael@0 | 242 | CreateEncodedOCSPResponse(OCSPResponseContext& context) |
michael@0 | 243 | { |
michael@0 | 244 | if (!context.arena || !context.cert || !context.issuerCert || |
michael@0 | 245 | !context.signerCert) { |
michael@0 | 246 | PR_SetError(SEC_ERROR_INVALID_ARGS, 0); |
michael@0 | 247 | return nullptr; |
michael@0 | 248 | } |
michael@0 | 249 | |
michael@0 | 250 | // OCSPResponse ::= SEQUENCE { |
michael@0 | 251 | // responseStatus OCSPResponseStatus, |
michael@0 | 252 | // responseBytes [0] EXPLICIT ResponseBytes OPTIONAL } |
michael@0 | 253 | |
michael@0 | 254 | // OCSPResponseStatus ::= ENUMERATED { |
michael@0 | 255 | // successful (0), -- Response has valid confirmations |
michael@0 | 256 | // malformedRequest (1), -- Illegal confirmation request |
michael@0 | 257 | // internalError (2), -- Internal error in issuer |
michael@0 | 258 | // tryLater (3), -- Try again later |
michael@0 | 259 | // -- (4) is not used |
michael@0 | 260 | // sigRequired (5), -- Must sign the request |
michael@0 | 261 | // unauthorized (6) -- Request unauthorized |
michael@0 | 262 | // } |
michael@0 | 263 | SECItem* responseStatus = SECITEM_AllocItem(context.arena, nullptr, 3); |
michael@0 | 264 | if (!responseStatus) { |
michael@0 | 265 | return nullptr; |
michael@0 | 266 | } |
michael@0 | 267 | responseStatus->data[0] = der::ENUMERATED; |
michael@0 | 268 | responseStatus->data[1] = 1; |
michael@0 | 269 | responseStatus->data[2] = context.responseStatus; |
michael@0 | 270 | |
michael@0 | 271 | SECItem* responseBytesNested = nullptr; |
michael@0 | 272 | if (!context.skipResponseBytes) { |
michael@0 | 273 | SECItem* responseBytes = ResponseBytes(context); |
michael@0 | 274 | if (!responseBytes) { |
michael@0 | 275 | return nullptr; |
michael@0 | 276 | } |
michael@0 | 277 | |
michael@0 | 278 | responseBytesNested = EncodeNested(context.arena, |
michael@0 | 279 | der::CONSTRUCTED | |
michael@0 | 280 | der::CONTEXT_SPECIFIC, |
michael@0 | 281 | responseBytes); |
michael@0 | 282 | if (!responseBytesNested) { |
michael@0 | 283 | return nullptr; |
michael@0 | 284 | } |
michael@0 | 285 | } |
michael@0 | 286 | |
michael@0 | 287 | Output output; |
michael@0 | 288 | if (output.Add(responseStatus) != der::Success) { |
michael@0 | 289 | return nullptr; |
michael@0 | 290 | } |
michael@0 | 291 | if (responseBytesNested) { |
michael@0 | 292 | if (output.Add(responseBytesNested) != der::Success) { |
michael@0 | 293 | return nullptr; |
michael@0 | 294 | } |
michael@0 | 295 | } |
michael@0 | 296 | return output.Squash(context.arena, der::SEQUENCE); |
michael@0 | 297 | } |
michael@0 | 298 | |
michael@0 | 299 | // ResponseBytes ::= SEQUENCE { |
michael@0 | 300 | // responseType OBJECT IDENTIFIER, |
michael@0 | 301 | // response OCTET STRING } |
michael@0 | 302 | SECItem* |
michael@0 | 303 | ResponseBytes(OCSPResponseContext& context) |
michael@0 | 304 | { |
michael@0 | 305 | // Includes tag and length |
michael@0 | 306 | static const uint8_t id_pkix_ocsp_basic_encoded[] = { |
michael@0 | 307 | 0x06, 0x09, 0x2B, 0x06, 0x01, 0x05, 0x05, 0x07, 0x30, 0x01, 0x01 |
michael@0 | 308 | }; |
michael@0 | 309 | SECItem id_pkix_ocsp_basic = { |
michael@0 | 310 | siBuffer, |
michael@0 | 311 | const_cast<uint8_t*>(id_pkix_ocsp_basic_encoded), |
michael@0 | 312 | PR_ARRAY_SIZE(id_pkix_ocsp_basic_encoded) |
michael@0 | 313 | }; |
michael@0 | 314 | SECItem* response = BasicOCSPResponse(context); |
michael@0 | 315 | if (!response) { |
michael@0 | 316 | return nullptr; |
michael@0 | 317 | } |
michael@0 | 318 | SECItem* responseNested = EncodeNested(context.arena, der::OCTET_STRING, |
michael@0 | 319 | response); |
michael@0 | 320 | if (!responseNested) { |
michael@0 | 321 | return nullptr; |
michael@0 | 322 | } |
michael@0 | 323 | |
michael@0 | 324 | Output output; |
michael@0 | 325 | if (output.Add(&id_pkix_ocsp_basic) != der::Success) { |
michael@0 | 326 | return nullptr; |
michael@0 | 327 | } |
michael@0 | 328 | if (output.Add(responseNested) != der::Success) { |
michael@0 | 329 | return nullptr; |
michael@0 | 330 | } |
michael@0 | 331 | return output.Squash(context.arena, der::SEQUENCE); |
michael@0 | 332 | } |
michael@0 | 333 | |
michael@0 | 334 | // BasicOCSPResponse ::= SEQUENCE { |
michael@0 | 335 | // tbsResponseData ResponseData, |
michael@0 | 336 | // signatureAlgorithm AlgorithmIdentifier, |
michael@0 | 337 | // signature BIT STRING, |
michael@0 | 338 | // certs [0] EXPLICIT SEQUENCE OF Certificate OPTIONAL } |
michael@0 | 339 | SECItem* |
michael@0 | 340 | BasicOCSPResponse(OCSPResponseContext& context) |
michael@0 | 341 | { |
michael@0 | 342 | SECItem* tbsResponseData = ResponseData(context); |
michael@0 | 343 | if (!tbsResponseData) { |
michael@0 | 344 | return nullptr; |
michael@0 | 345 | } |
michael@0 | 346 | |
michael@0 | 347 | |
michael@0 | 348 | pkix::ScopedPtr<SECKEYPrivateKey, SECKEY_DestroyPrivateKey> privKey( |
michael@0 | 349 | PK11_FindKeyByAnyCert(context.signerCert.get(), nullptr)); |
michael@0 | 350 | if (!privKey) { |
michael@0 | 351 | return nullptr; |
michael@0 | 352 | } |
michael@0 | 353 | SECOidTag signatureAlgTag = SEC_GetSignatureAlgorithmOidTag(privKey->keyType, |
michael@0 | 354 | SEC_OID_SHA1); |
michael@0 | 355 | if (signatureAlgTag == SEC_OID_UNKNOWN) { |
michael@0 | 356 | return nullptr; |
michael@0 | 357 | } |
michael@0 | 358 | SECItem* signatureAlgorithm = AlgorithmIdentifier(context.arena, |
michael@0 | 359 | signatureAlgTag); |
michael@0 | 360 | if (!signatureAlgorithm) { |
michael@0 | 361 | return nullptr; |
michael@0 | 362 | } |
michael@0 | 363 | |
michael@0 | 364 | // SEC_SignData doesn't take an arena parameter, so we have to manage |
michael@0 | 365 | // the memory allocated in signature. |
michael@0 | 366 | SECItem signature; |
michael@0 | 367 | if (SEC_SignData(&signature, tbsResponseData->data, tbsResponseData->len, |
michael@0 | 368 | privKey.get(), signatureAlgTag) != SECSuccess) |
michael@0 | 369 | { |
michael@0 | 370 | return nullptr; |
michael@0 | 371 | } |
michael@0 | 372 | // We have to add a byte at the beginning indicating no unused bits. |
michael@0 | 373 | // TODO: add ability to have signatures of bit length not divisible by 8, |
michael@0 | 374 | // resulting in unused bits in the bitstring encoding |
michael@0 | 375 | SECItem* prefixedSignature = SECITEM_AllocItem(context.arena, nullptr, |
michael@0 | 376 | signature.len + 1); |
michael@0 | 377 | if (!prefixedSignature) { |
michael@0 | 378 | SECITEM_FreeItem(&signature, false); |
michael@0 | 379 | return nullptr; |
michael@0 | 380 | } |
michael@0 | 381 | prefixedSignature->data[0] = 0; |
michael@0 | 382 | memcpy(prefixedSignature->data + 1, signature.data, signature.len); |
michael@0 | 383 | SECITEM_FreeItem(&signature, false); |
michael@0 | 384 | if (context.badSignature) { |
michael@0 | 385 | PR_ASSERT(prefixedSignature->len > 8); |
michael@0 | 386 | prefixedSignature->data[8]++; |
michael@0 | 387 | } |
michael@0 | 388 | SECItem* signatureNested = EncodeNested(context.arena, der::BIT_STRING, |
michael@0 | 389 | prefixedSignature); |
michael@0 | 390 | if (!signatureNested) { |
michael@0 | 391 | return nullptr; |
michael@0 | 392 | } |
michael@0 | 393 | SECItem* certificatesNested = nullptr; |
michael@0 | 394 | if (context.includedCertificates[0]) { |
michael@0 | 395 | SECItem* certificates = Certificates(context); |
michael@0 | 396 | if (!certificates) { |
michael@0 | 397 | return nullptr; |
michael@0 | 398 | } |
michael@0 | 399 | certificatesNested = EncodeNested(context.arena, |
michael@0 | 400 | der::CONSTRUCTED | |
michael@0 | 401 | der::CONTEXT_SPECIFIC | |
michael@0 | 402 | 0, |
michael@0 | 403 | certificates); |
michael@0 | 404 | if (!certificatesNested) { |
michael@0 | 405 | return nullptr; |
michael@0 | 406 | } |
michael@0 | 407 | } |
michael@0 | 408 | |
michael@0 | 409 | Output output; |
michael@0 | 410 | if (output.Add(tbsResponseData) != der::Success) { |
michael@0 | 411 | return nullptr; |
michael@0 | 412 | } |
michael@0 | 413 | if (output.Add(signatureAlgorithm) != der::Success) { |
michael@0 | 414 | return nullptr; |
michael@0 | 415 | } |
michael@0 | 416 | if (output.Add(signatureNested) != der::Success) { |
michael@0 | 417 | return nullptr; |
michael@0 | 418 | } |
michael@0 | 419 | if (certificatesNested) { |
michael@0 | 420 | if (output.Add(certificatesNested) != der::Success) { |
michael@0 | 421 | return nullptr; |
michael@0 | 422 | } |
michael@0 | 423 | } |
michael@0 | 424 | return output.Squash(context.arena, der::SEQUENCE); |
michael@0 | 425 | } |
michael@0 | 426 | |
michael@0 | 427 | // Extension ::= SEQUENCE { |
michael@0 | 428 | // id OBJECT IDENTIFIER, |
michael@0 | 429 | // critical BOOLEAN DEFAULT FALSE |
michael@0 | 430 | // value OCTET STRING |
michael@0 | 431 | // } |
michael@0 | 432 | static SECItem* |
michael@0 | 433 | OCSPExtension(OCSPResponseContext& context, OCSPResponseExtension* extension) |
michael@0 | 434 | { |
michael@0 | 435 | Output output; |
michael@0 | 436 | if (output.Add(&extension->id) != der::Success) { |
michael@0 | 437 | return nullptr; |
michael@0 | 438 | } |
michael@0 | 439 | if (extension->critical) { |
michael@0 | 440 | static const uint8_t trueEncoded[3] = { 0x01, 0x01, 0xFF }; |
michael@0 | 441 | SECItem critical = { |
michael@0 | 442 | siBuffer, |
michael@0 | 443 | const_cast<uint8_t*>(trueEncoded), |
michael@0 | 444 | PR_ARRAY_SIZE(trueEncoded) |
michael@0 | 445 | }; |
michael@0 | 446 | if (output.Add(&critical) != der::Success) { |
michael@0 | 447 | return nullptr; |
michael@0 | 448 | } |
michael@0 | 449 | } |
michael@0 | 450 | SECItem* value = EncodeNested(context.arena, der::OCTET_STRING, |
michael@0 | 451 | &extension->value); |
michael@0 | 452 | if (!value) { |
michael@0 | 453 | return nullptr; |
michael@0 | 454 | } |
michael@0 | 455 | if (output.Add(value) != der::Success) { |
michael@0 | 456 | return nullptr; |
michael@0 | 457 | } |
michael@0 | 458 | return output.Squash(context.arena, der::SEQUENCE); |
michael@0 | 459 | } |
michael@0 | 460 | |
michael@0 | 461 | // Extensions ::= [1] { |
michael@0 | 462 | // SEQUENCE OF Extension |
michael@0 | 463 | // } |
michael@0 | 464 | static SECItem* |
michael@0 | 465 | Extensions(OCSPResponseContext& context) |
michael@0 | 466 | { |
michael@0 | 467 | Output output; |
michael@0 | 468 | for (OCSPResponseExtension* extension = context.extensions; |
michael@0 | 469 | extension; extension = extension->next) { |
michael@0 | 470 | SECItem* extensionEncoded = OCSPExtension(context, extension); |
michael@0 | 471 | if (!extensionEncoded) { |
michael@0 | 472 | return nullptr; |
michael@0 | 473 | } |
michael@0 | 474 | if (output.Add(extensionEncoded) != der::Success) { |
michael@0 | 475 | return nullptr; |
michael@0 | 476 | } |
michael@0 | 477 | } |
michael@0 | 478 | SECItem* extensionsEncoded = output.Squash(context.arena, der::SEQUENCE); |
michael@0 | 479 | if (!extensionsEncoded) { |
michael@0 | 480 | return nullptr; |
michael@0 | 481 | } |
michael@0 | 482 | return EncodeNested(context.arena, |
michael@0 | 483 | der::CONSTRUCTED | |
michael@0 | 484 | der::CONTEXT_SPECIFIC | |
michael@0 | 485 | 1, |
michael@0 | 486 | extensionsEncoded); |
michael@0 | 487 | } |
michael@0 | 488 | |
michael@0 | 489 | // ResponseData ::= SEQUENCE { |
michael@0 | 490 | // version [0] EXPLICIT Version DEFAULT v1, |
michael@0 | 491 | // responderID ResponderID, |
michael@0 | 492 | // producedAt GeneralizedTime, |
michael@0 | 493 | // responses SEQUENCE OF SingleResponse, |
michael@0 | 494 | // responseExtensions [1] EXPLICIT Extensions OPTIONAL } |
michael@0 | 495 | SECItem* |
michael@0 | 496 | ResponseData(OCSPResponseContext& context) |
michael@0 | 497 | { |
michael@0 | 498 | SECItem* responderID = ResponderID(context); |
michael@0 | 499 | if (!responderID) { |
michael@0 | 500 | return nullptr; |
michael@0 | 501 | } |
michael@0 | 502 | SECItem* producedAtEncoded = PRTimeToEncodedTime(context.arena, |
michael@0 | 503 | context.producedAt); |
michael@0 | 504 | if (!producedAtEncoded) { |
michael@0 | 505 | return nullptr; |
michael@0 | 506 | } |
michael@0 | 507 | SECItem* responses = SingleResponse(context); |
michael@0 | 508 | if (!responses) { |
michael@0 | 509 | return nullptr; |
michael@0 | 510 | } |
michael@0 | 511 | SECItem* responsesNested = EncodeNested(context.arena, der::SEQUENCE, |
michael@0 | 512 | responses); |
michael@0 | 513 | if (!responsesNested) { |
michael@0 | 514 | return nullptr; |
michael@0 | 515 | } |
michael@0 | 516 | SECItem* responseExtensions = nullptr; |
michael@0 | 517 | if (context.extensions || context.includeEmptyExtensions) { |
michael@0 | 518 | responseExtensions = Extensions(context); |
michael@0 | 519 | } |
michael@0 | 520 | |
michael@0 | 521 | Output output; |
michael@0 | 522 | if (output.Add(responderID) != der::Success) { |
michael@0 | 523 | return nullptr; |
michael@0 | 524 | } |
michael@0 | 525 | if (output.Add(producedAtEncoded) != der::Success) { |
michael@0 | 526 | return nullptr; |
michael@0 | 527 | } |
michael@0 | 528 | if (output.Add(responsesNested) != der::Success) { |
michael@0 | 529 | return nullptr; |
michael@0 | 530 | } |
michael@0 | 531 | if (responseExtensions) { |
michael@0 | 532 | if (output.Add(responseExtensions) != der::Success) { |
michael@0 | 533 | return nullptr; |
michael@0 | 534 | } |
michael@0 | 535 | } |
michael@0 | 536 | return output.Squash(context.arena, der::SEQUENCE); |
michael@0 | 537 | } |
michael@0 | 538 | |
michael@0 | 539 | // ResponderID ::= CHOICE { |
michael@0 | 540 | // byName [1] Name, |
michael@0 | 541 | // byKey [2] KeyHash } |
michael@0 | 542 | // } |
michael@0 | 543 | SECItem* |
michael@0 | 544 | ResponderID(OCSPResponseContext& context) |
michael@0 | 545 | { |
michael@0 | 546 | SECItem* contents = nullptr; |
michael@0 | 547 | if (context.responderIDType == OCSPResponseContext::ByName) { |
michael@0 | 548 | contents = &context.signerCert->derSubject; |
michael@0 | 549 | } else if (context.responderIDType == OCSPResponseContext::ByKeyHash) { |
michael@0 | 550 | contents = KeyHash(context); |
michael@0 | 551 | if (!contents) { |
michael@0 | 552 | return nullptr; |
michael@0 | 553 | } |
michael@0 | 554 | } else { |
michael@0 | 555 | return nullptr; |
michael@0 | 556 | } |
michael@0 | 557 | |
michael@0 | 558 | return EncodeNested(context.arena, |
michael@0 | 559 | der::CONSTRUCTED | |
michael@0 | 560 | der::CONTEXT_SPECIFIC | |
michael@0 | 561 | context.responderIDType, |
michael@0 | 562 | contents); |
michael@0 | 563 | } |
michael@0 | 564 | |
michael@0 | 565 | // KeyHash ::= OCTET STRING -- SHA-1 hash of responder's public key |
michael@0 | 566 | // -- (i.e., the SHA-1 hash of the value of the |
michael@0 | 567 | // -- BIT STRING subjectPublicKey [excluding |
michael@0 | 568 | // -- the tag, length, and number of unused |
michael@0 | 569 | // -- bits] in the responder's certificate) |
michael@0 | 570 | SECItem* |
michael@0 | 571 | KeyHash(OCSPResponseContext& context) |
michael@0 | 572 | { |
michael@0 | 573 | return KeyHashHelper(context.arena, context.signerCert.get()); |
michael@0 | 574 | } |
michael@0 | 575 | |
michael@0 | 576 | // SingleResponse ::= SEQUENCE { |
michael@0 | 577 | // certID CertID, |
michael@0 | 578 | // certStatus CertStatus, |
michael@0 | 579 | // thisUpdate GeneralizedTime, |
michael@0 | 580 | // nextUpdate [0] EXPLICIT GeneralizedTime OPTIONAL, |
michael@0 | 581 | // singleExtensions [1] EXPLICIT Extensions OPTIONAL } |
michael@0 | 582 | SECItem* |
michael@0 | 583 | SingleResponse(OCSPResponseContext& context) |
michael@0 | 584 | { |
michael@0 | 585 | SECItem* certID = CertID(context); |
michael@0 | 586 | if (!certID) { |
michael@0 | 587 | return nullptr; |
michael@0 | 588 | } |
michael@0 | 589 | SECItem* certStatus = CertStatus(context); |
michael@0 | 590 | if (!certStatus) { |
michael@0 | 591 | return nullptr; |
michael@0 | 592 | } |
michael@0 | 593 | SECItem* thisUpdateEncoded = PRTimeToEncodedTime(context.arena, |
michael@0 | 594 | context.thisUpdate); |
michael@0 | 595 | if (!thisUpdateEncoded) { |
michael@0 | 596 | return nullptr; |
michael@0 | 597 | } |
michael@0 | 598 | SECItem* nextUpdateEncodedNested = nullptr; |
michael@0 | 599 | if (context.includeNextUpdate) { |
michael@0 | 600 | SECItem* nextUpdateEncoded = PRTimeToEncodedTime(context.arena, |
michael@0 | 601 | context.nextUpdate); |
michael@0 | 602 | if (!nextUpdateEncoded) { |
michael@0 | 603 | return nullptr; |
michael@0 | 604 | } |
michael@0 | 605 | nextUpdateEncodedNested = EncodeNested(context.arena, |
michael@0 | 606 | der::CONSTRUCTED | |
michael@0 | 607 | der::CONTEXT_SPECIFIC | |
michael@0 | 608 | 0, |
michael@0 | 609 | nextUpdateEncoded); |
michael@0 | 610 | if (!nextUpdateEncodedNested) { |
michael@0 | 611 | return nullptr; |
michael@0 | 612 | } |
michael@0 | 613 | } |
michael@0 | 614 | |
michael@0 | 615 | Output output; |
michael@0 | 616 | if (output.Add(certID) != der::Success) { |
michael@0 | 617 | return nullptr; |
michael@0 | 618 | } |
michael@0 | 619 | if (output.Add(certStatus) != der::Success) { |
michael@0 | 620 | return nullptr; |
michael@0 | 621 | } |
michael@0 | 622 | if (output.Add(thisUpdateEncoded) != der::Success) { |
michael@0 | 623 | return nullptr; |
michael@0 | 624 | } |
michael@0 | 625 | if (nextUpdateEncodedNested) { |
michael@0 | 626 | if (output.Add(nextUpdateEncodedNested) != der::Success) { |
michael@0 | 627 | return nullptr; |
michael@0 | 628 | } |
michael@0 | 629 | } |
michael@0 | 630 | return output.Squash(context.arena, der::SEQUENCE); |
michael@0 | 631 | } |
michael@0 | 632 | |
michael@0 | 633 | // CertID ::= SEQUENCE { |
michael@0 | 634 | // hashAlgorithm AlgorithmIdentifier, |
michael@0 | 635 | // issuerNameHash OCTET STRING, -- Hash of issuer's DN |
michael@0 | 636 | // issuerKeyHash OCTET STRING, -- Hash of issuer's public key |
michael@0 | 637 | // serialNumber CertificateSerialNumber } |
michael@0 | 638 | SECItem* |
michael@0 | 639 | CertID(OCSPResponseContext& context) |
michael@0 | 640 | { |
michael@0 | 641 | SECItem* hashAlgorithm = AlgorithmIdentifier(context.arena, |
michael@0 | 642 | context.certIDHashAlg); |
michael@0 | 643 | if (!hashAlgorithm) { |
michael@0 | 644 | return nullptr; |
michael@0 | 645 | } |
michael@0 | 646 | SECItem* issuerNameHash = HashedOctetString(context.arena, |
michael@0 | 647 | &context.issuerCert->derSubject, |
michael@0 | 648 | context.certIDHashAlg); |
michael@0 | 649 | if (!issuerNameHash) { |
michael@0 | 650 | return nullptr; |
michael@0 | 651 | } |
michael@0 | 652 | SECItem* issuerKeyHash = KeyHashHelper(context.arena, |
michael@0 | 653 | context.issuerCert.get()); |
michael@0 | 654 | if (!issuerKeyHash) { |
michael@0 | 655 | return nullptr; |
michael@0 | 656 | } |
michael@0 | 657 | static const SEC_ASN1Template serialTemplate[] = { |
michael@0 | 658 | { SEC_ASN1_INTEGER, offsetof(CERTCertificate, serialNumber) }, |
michael@0 | 659 | { 0 } |
michael@0 | 660 | }; |
michael@0 | 661 | SECItem* serialNumber = SEC_ASN1EncodeItem(context.arena, nullptr, |
michael@0 | 662 | context.cert.get(), |
michael@0 | 663 | serialTemplate); |
michael@0 | 664 | if (!serialNumber) { |
michael@0 | 665 | return nullptr; |
michael@0 | 666 | } |
michael@0 | 667 | |
michael@0 | 668 | Output output; |
michael@0 | 669 | if (output.Add(hashAlgorithm) != der::Success) { |
michael@0 | 670 | return nullptr; |
michael@0 | 671 | } |
michael@0 | 672 | if (output.Add(issuerNameHash) != der::Success) { |
michael@0 | 673 | return nullptr; |
michael@0 | 674 | } |
michael@0 | 675 | if (output.Add(issuerKeyHash) != der::Success) { |
michael@0 | 676 | return nullptr; |
michael@0 | 677 | } |
michael@0 | 678 | if (output.Add(serialNumber) != der::Success) { |
michael@0 | 679 | return nullptr; |
michael@0 | 680 | } |
michael@0 | 681 | return output.Squash(context.arena, der::SEQUENCE); |
michael@0 | 682 | } |
michael@0 | 683 | |
michael@0 | 684 | // CertStatus ::= CHOICE { |
michael@0 | 685 | // good [0] IMPLICIT NULL, |
michael@0 | 686 | // revoked [1] IMPLICIT RevokedInfo, |
michael@0 | 687 | // unknown [2] IMPLICIT UnknownInfo } |
michael@0 | 688 | // |
michael@0 | 689 | // RevokedInfo ::= SEQUENCE { |
michael@0 | 690 | // revocationTime GeneralizedTime, |
michael@0 | 691 | // revocationReason [0] EXPLICIT CRLReason OPTIONAL } |
michael@0 | 692 | // |
michael@0 | 693 | // UnknownInfo ::= NULL |
michael@0 | 694 | // |
michael@0 | 695 | SECItem* |
michael@0 | 696 | CertStatus(OCSPResponseContext& context) |
michael@0 | 697 | { |
michael@0 | 698 | switch (context.certStatus) { |
michael@0 | 699 | // Both good and unknown are ultimately represented as NULL - the only |
michael@0 | 700 | // difference is in the tag that identifies them. |
michael@0 | 701 | case 0: |
michael@0 | 702 | case 2: |
michael@0 | 703 | { |
michael@0 | 704 | SECItem* status = SECITEM_AllocItem(context.arena, nullptr, 2); |
michael@0 | 705 | if (!status) { |
michael@0 | 706 | return nullptr; |
michael@0 | 707 | } |
michael@0 | 708 | status->data[0] = der::CONTEXT_SPECIFIC | context.certStatus; |
michael@0 | 709 | status->data[1] = 0; |
michael@0 | 710 | return status; |
michael@0 | 711 | } |
michael@0 | 712 | case 1: |
michael@0 | 713 | { |
michael@0 | 714 | SECItem* revocationTime = PRTimeToEncodedTime(context.arena, |
michael@0 | 715 | context.revocationTime); |
michael@0 | 716 | if (!revocationTime) { |
michael@0 | 717 | return nullptr; |
michael@0 | 718 | } |
michael@0 | 719 | // TODO(bug 980536): add support for revocationReason |
michael@0 | 720 | return EncodeNested(context.arena, |
michael@0 | 721 | der::CONSTRUCTED | der::CONTEXT_SPECIFIC | 1, |
michael@0 | 722 | revocationTime); |
michael@0 | 723 | } |
michael@0 | 724 | default: |
michael@0 | 725 | PR_NOT_REACHED("CertStatus: bad context.certStatus"); |
michael@0 | 726 | PR_Abort(); |
michael@0 | 727 | } |
michael@0 | 728 | return nullptr; |
michael@0 | 729 | } |
michael@0 | 730 | |
michael@0 | 731 | // SEQUENCE OF Certificate |
michael@0 | 732 | SECItem* |
michael@0 | 733 | Certificates(OCSPResponseContext& context) |
michael@0 | 734 | { |
michael@0 | 735 | Output output; |
michael@0 | 736 | for (size_t i = 0; i < context.MaxIncludedCertificates; i++) { |
michael@0 | 737 | CERTCertificate* cert = context.includedCertificates[i].get(); |
michael@0 | 738 | if (!cert) { |
michael@0 | 739 | break; |
michael@0 | 740 | } |
michael@0 | 741 | output.Add(&cert->derCert); |
michael@0 | 742 | } |
michael@0 | 743 | return output.Squash(context.arena, der::SEQUENCE); |
michael@0 | 744 | } |
michael@0 | 745 | |
michael@0 | 746 | } } } // namespace mozilla::pkix::test |