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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "crypto/ec_private_key.h" | |
| 6 | |
| 7 extern "C" { | |
| 8 // Work around NSS missing SEC_BEGIN_PROTOS in secmodt.h. This must come before | |
| 9 // other NSS headers. | |
| 10 #include <secmodt.h> | |
| 11 } | |
| 12 | |
| 13 #include <cryptohi.h> | |
| 14 #include <keyhi.h> | |
| 15 #include <pk11pub.h> | |
| 16 #include <secmod.h> | |
| 17 | |
| 18 #include "base/lazy_instance.h" | |
| 19 #include "base/logging.h" | |
| 20 #include "base/memory/scoped_ptr.h" | |
| 21 #include "crypto/nss_util.h" | |
| 22 #include "crypto/nss_util_internal.h" | |
| 23 #include "crypto/scoped_nss_types.h" | |
| 24 #include "crypto/third_party/nss/chromium-nss.h" | |
| 25 | |
| 26 namespace { | |
| 27 | |
| 28 PK11SlotInfo* GetTempKeySlot() { | |
| 29 return PK11_GetInternalSlot(); | |
| 30 } | |
| 31 | |
| 32 class EllipticCurveSupportChecker { | |
| 33 public: | |
| 34 EllipticCurveSupportChecker() { | |
| 35 // NOTE: we can do this check here only because we use the NSS internal | |
| 36 // slot. If we support other slots in the future, checking whether they | |
| 37 // support ECDSA may block NSS, and the value may also change as devices are | |
| 38 // inserted/removed, so we would need to re-check on every use. | |
| 39 crypto::EnsureNSSInit(); | |
| 40 crypto::ScopedPK11Slot slot(GetTempKeySlot()); | |
| 41 supported_ = PK11_DoesMechanism(slot.get(), CKM_EC_KEY_PAIR_GEN) && | |
| 42 PK11_DoesMechanism(slot.get(), CKM_ECDSA); | |
| 43 } | |
| 44 | |
| 45 bool Supported() { | |
| 46 return supported_; | |
| 47 } | |
| 48 | |
| 49 private: | |
| 50 bool supported_; | |
| 51 }; | |
| 52 | |
| 53 static base::LazyInstance<EllipticCurveSupportChecker>::Leaky | |
| 54 g_elliptic_curve_supported = LAZY_INSTANCE_INITIALIZER; | |
| 55 | |
| 56 // Copied from rsa_private_key_nss.cc. | |
| 57 static bool ReadAttribute(SECKEYPrivateKey* key, | |
| 58 CK_ATTRIBUTE_TYPE type, | |
| 59 std::vector<uint8>* output) { | |
| 60 SECItem item; | |
| 61 SECStatus rv; | |
| 62 rv = PK11_ReadRawAttribute(PK11_TypePrivKey, key, type, &item); | |
| 63 if (rv != SECSuccess) { | |
| 64 DLOG(ERROR) << "PK11_ReadRawAttribute: " << PORT_GetError(); | |
| 65 return false; | |
| 66 } | |
| 67 | |
| 68 output->assign(item.data, item.data + item.len); | |
| 69 SECITEM_FreeItem(&item, PR_FALSE); | |
| 70 return true; | |
| 71 } | |
| 72 | |
| 73 } // namespace | |
| 74 | |
| 75 namespace crypto { | |
| 76 | |
| 77 ECPrivateKey::~ECPrivateKey() { | |
| 78 if (key_) | |
| 79 SECKEY_DestroyPrivateKey(key_); | |
| 80 if (public_key_) | |
| 81 SECKEY_DestroyPublicKey(public_key_); | |
| 82 } | |
| 83 | |
| 84 // static | |
| 85 bool ECPrivateKey::IsSupported() { | |
| 86 return g_elliptic_curve_supported.Get().Supported(); | |
| 87 } | |
| 88 | |
| 89 // static | |
| 90 ECPrivateKey* ECPrivateKey::Create() { | |
| 91 EnsureNSSInit(); | |
| 92 | |
| 93 ScopedPK11Slot slot(GetTempKeySlot()); | |
| 94 return CreateWithParams(slot.get(), | |
| 95 false /* not permanent */, | |
| 96 false /* not sensitive */); | |
| 97 } | |
| 98 | |
| 99 #if defined(USE_NSS) | |
| 100 // static | |
| 101 ECPrivateKey* ECPrivateKey::CreateSensitive(PK11SlotInfo* slot) { | |
| 102 return CreateWithParams( | |
| 103 slot, true /* permanent */, true /* sensitive */); | |
| 104 } | |
| 105 #endif | |
| 106 | |
| 107 // static | |
| 108 ECPrivateKey* ECPrivateKey::CreateFromEncryptedPrivateKeyInfo( | |
| 109 const std::string& password, | |
| 110 const std::vector<uint8>& encrypted_private_key_info, | |
| 111 const std::vector<uint8>& subject_public_key_info) { | |
| 112 EnsureNSSInit(); | |
| 113 | |
| 114 ScopedPK11Slot slot(GetTempKeySlot()); | |
| 115 return CreateFromEncryptedPrivateKeyInfoWithParams( | |
| 116 slot.get(), | |
| 117 password, | |
| 118 encrypted_private_key_info, | |
| 119 subject_public_key_info, | |
| 120 false /* not permanent */, | |
| 121 false /* not sensitive */); | |
| 122 } | |
| 123 | |
| 124 #if defined(USE_NSS) | |
| 125 // static | |
| 126 ECPrivateKey* ECPrivateKey::CreateSensitiveFromEncryptedPrivateKeyInfo( | |
| 127 PK11SlotInfo* slot, | |
| 128 const std::string& password, | |
| 129 const std::vector<uint8>& encrypted_private_key_info, | |
| 130 const std::vector<uint8>& subject_public_key_info) { | |
| 131 return CreateFromEncryptedPrivateKeyInfoWithParams( | |
| 132 slot, | |
| 133 password, | |
| 134 encrypted_private_key_info, | |
| 135 subject_public_key_info, | |
| 136 true /* permanent */, | |
| 137 true /* sensitive */); | |
| 138 } | |
| 139 #endif | |
| 140 | |
| 141 // static | |
| 142 bool ECPrivateKey::ImportFromEncryptedPrivateKeyInfo( | |
| 143 PK11SlotInfo* slot, | |
| 144 const std::string& password, | |
| 145 const uint8* encrypted_private_key_info, | |
| 146 size_t encrypted_private_key_info_len, | |
| 147 CERTSubjectPublicKeyInfo* decoded_spki, | |
| 148 bool permanent, | |
| 149 bool sensitive, | |
| 150 SECKEYPrivateKey** key, | |
| 151 SECKEYPublicKey** public_key) { | |
| 152 if (!slot) | |
| 153 return false; | |
| 154 | |
| 155 *public_key = SECKEY_ExtractPublicKey(decoded_spki); | |
| 156 | |
| 157 if (!*public_key) { | |
| 158 DLOG(ERROR) << "SECKEY_ExtractPublicKey: " << PORT_GetError(); | |
| 159 return false; | |
| 160 } | |
| 161 | |
| 162 if (SECKEY_GetPublicKeyType(*public_key) != ecKey) { | |
| 163 DLOG(ERROR) << "The public key is not an EC key"; | |
| 164 SECKEY_DestroyPublicKey(*public_key); | |
| 165 *public_key = NULL; | |
| 166 return false; | |
| 167 } | |
| 168 | |
| 169 SECItem encoded_epki = { | |
| 170 siBuffer, | |
| 171 const_cast<unsigned char*>(encrypted_private_key_info), | |
| 172 static_cast<unsigned>(encrypted_private_key_info_len) | |
| 173 }; | |
| 174 SECKEYEncryptedPrivateKeyInfo epki; | |
| 175 memset(&epki, 0, sizeof(epki)); | |
| 176 | |
| 177 ScopedPLArenaPool arena(PORT_NewArena(DER_DEFAULT_CHUNKSIZE)); | |
| 178 | |
| 179 SECStatus rv = SEC_QuickDERDecodeItem( | |
| 180 arena.get(), | |
| 181 &epki, | |
| 182 SEC_ASN1_GET(SECKEY_EncryptedPrivateKeyInfoTemplate), | |
| 183 &encoded_epki); | |
| 184 if (rv != SECSuccess) { | |
| 185 DLOG(ERROR) << "SEC_QuickDERDecodeItem: " << PORT_GetError(); | |
| 186 SECKEY_DestroyPublicKey(*public_key); | |
| 187 *public_key = NULL; | |
| 188 return false; | |
| 189 } | |
| 190 | |
| 191 SECItem password_item = { | |
| 192 siBuffer, | |
| 193 reinterpret_cast<unsigned char*>(const_cast<char*>(password.data())), | |
| 194 static_cast<unsigned>(password.size()) | |
| 195 }; | |
| 196 | |
| 197 rv = ImportEncryptedECPrivateKeyInfoAndReturnKey( | |
| 198 slot, | |
| 199 &epki, | |
| 200 &password_item, | |
| 201 NULL, // nickname | |
| 202 &(*public_key)->u.ec.publicValue, | |
| 203 permanent, | |
| 204 sensitive, | |
| 205 key, | |
| 206 NULL); // wincx | |
| 207 if (rv != SECSuccess) { | |
| 208 DLOG(ERROR) << "ImportEncryptedECPrivateKeyInfoAndReturnKey: " | |
| 209 << PORT_GetError(); | |
| 210 SECKEY_DestroyPublicKey(*public_key); | |
| 211 *public_key = NULL; | |
| 212 return false; | |
| 213 } | |
| 214 | |
| 215 return true; | |
| 216 } | |
| 217 | |
| 218 ECPrivateKey* ECPrivateKey::Copy() const { | |
| 219 scoped_ptr<ECPrivateKey> copy(new ECPrivateKey); | |
| 220 if (key_) { | |
| 221 copy->key_ = SECKEY_CopyPrivateKey(key_); | |
| 222 if (!copy->key_) | |
| 223 return NULL; | |
| 224 } | |
| 225 if (public_key_) { | |
| 226 copy->public_key_ = SECKEY_CopyPublicKey(public_key_); | |
| 227 if (!copy->public_key_) | |
| 228 return NULL; | |
| 229 } | |
| 230 return copy.release(); | |
| 231 } | |
| 232 | |
| 233 bool ECPrivateKey::ExportEncryptedPrivateKey( | |
| 234 const std::string& password, | |
| 235 int iterations, | |
| 236 std::vector<uint8>* output) { | |
| 237 // We export as an EncryptedPrivateKeyInfo bundle instead of a plain PKCS #8 | |
| 238 // PrivateKeyInfo because PK11_ImportDERPrivateKeyInfoAndReturnKey doesn't | |
| 239 // support EC keys. | |
| 240 // https://bugzilla.mozilla.org/show_bug.cgi?id=327773 | |
| 241 SECItem password_item = { | |
| 242 siBuffer, | |
| 243 reinterpret_cast<unsigned char*>(const_cast<char*>(password.data())), | |
| 244 static_cast<unsigned>(password.size()) | |
| 245 }; | |
| 246 | |
| 247 SECKEYEncryptedPrivateKeyInfo* encrypted = PK11_ExportEncryptedPrivKeyInfo( | |
| 248 NULL, // Slot, optional. | |
| 249 SEC_OID_PKCS12_V2_PBE_WITH_SHA1_AND_3KEY_TRIPLE_DES_CBC, | |
| 250 &password_item, | |
| 251 key_, | |
| 252 iterations, | |
| 253 NULL); // wincx. | |
| 254 | |
| 255 if (!encrypted) { | |
| 256 DLOG(ERROR) << "PK11_ExportEncryptedPrivKeyInfo: " << PORT_GetError(); | |
| 257 return false; | |
| 258 } | |
| 259 | |
| 260 ScopedPLArenaPool arena(PORT_NewArena(DER_DEFAULT_CHUNKSIZE)); | |
| 261 SECItem der_key = {siBuffer, NULL, 0}; | |
| 262 SECItem* encoded_item = SEC_ASN1EncodeItem( | |
| 263 arena.get(), | |
| 264 &der_key, | |
| 265 encrypted, | |
| 266 SEC_ASN1_GET(SECKEY_EncryptedPrivateKeyInfoTemplate)); | |
| 267 SECKEY_DestroyEncryptedPrivateKeyInfo(encrypted, PR_TRUE); | |
| 268 if (!encoded_item) { | |
| 269 DLOG(ERROR) << "SEC_ASN1EncodeItem: " << PORT_GetError(); | |
| 270 return false; | |
| 271 } | |
| 272 | |
| 273 output->assign(der_key.data, der_key.data + der_key.len); | |
| 274 | |
| 275 return true; | |
| 276 } | |
| 277 | |
| 278 bool ECPrivateKey::ExportPublicKey(std::vector<uint8>* output) { | |
| 279 ScopedSECItem der_pubkey( | |
| 280 SECKEY_EncodeDERSubjectPublicKeyInfo(public_key_)); | |
| 281 if (!der_pubkey.get()) { | |
| 282 return false; | |
| 283 } | |
| 284 | |
| 285 output->assign(der_pubkey->data, der_pubkey->data + der_pubkey->len); | |
| 286 return true; | |
| 287 } | |
| 288 | |
| 289 bool ECPrivateKey::ExportRawPublicKey(std::string* output) { | |
| 290 // public_key_->u.ec.publicValue is an ANSI X9.62 public key which, for | |
| 291 // a P-256 key, is 0x04 (meaning uncompressed) followed by the x and y field | |
| 292 // elements as 32-byte, big-endian numbers. | |
| 293 static const unsigned int kExpectedKeyLength = 65; | |
| 294 | |
| 295 CHECK_EQ(ecKey, SECKEY_GetPublicKeyType(public_key_)); | |
| 296 const unsigned char* const data = public_key_->u.ec.publicValue.data; | |
| 297 const unsigned int len = public_key_->u.ec.publicValue.len; | |
| 298 if (len != kExpectedKeyLength || data[0] != 0x04) | |
| 299 return false; | |
| 300 | |
| 301 output->assign(reinterpret_cast<const char*>(data + 1), | |
| 302 kExpectedKeyLength - 1); | |
| 303 return true; | |
| 304 } | |
| 305 | |
| 306 bool ECPrivateKey::ExportValue(std::vector<uint8>* output) { | |
| 307 return ReadAttribute(key_, CKA_VALUE, output); | |
| 308 } | |
| 309 | |
| 310 bool ECPrivateKey::ExportECParams(std::vector<uint8>* output) { | |
| 311 return ReadAttribute(key_, CKA_EC_PARAMS, output); | |
| 312 } | |
| 313 | |
| 314 ECPrivateKey::ECPrivateKey() : key_(NULL), public_key_(NULL) {} | |
| 315 | |
| 316 // static | |
| 317 ECPrivateKey* ECPrivateKey::CreateWithParams(PK11SlotInfo* slot, | |
| 318 bool permanent, | |
| 319 bool sensitive) { | |
| 320 if (!slot) | |
| 321 return NULL; | |
| 322 | |
| 323 scoped_ptr<ECPrivateKey> result(new ECPrivateKey); | |
| 324 | |
| 325 SECOidData* oid_data = SECOID_FindOIDByTag(SEC_OID_SECG_EC_SECP256R1); | |
| 326 if (!oid_data) { | |
| 327 DLOG(ERROR) << "SECOID_FindOIDByTag: " << PORT_GetError(); | |
| 328 return NULL; | |
| 329 } | |
| 330 | |
| 331 // SECKEYECParams is a SECItem containing the DER encoded ASN.1 ECParameters | |
| 332 // value. For a named curve, that is just the OBJECT IDENTIFIER of the curve. | |
| 333 // In addition to the oid data, the encoding requires one byte for the ASN.1 | |
| 334 // tag and one byte for the length (assuming the length is <= 127). | |
| 335 DCHECK_LE(oid_data->oid.len, 127U); | |
| 336 std::vector<unsigned char> parameters_buf(2 + oid_data->oid.len); | |
| 337 SECKEYECParams ec_parameters = { | |
| 338 siDEROID, ¶meters_buf[0], | |
| 339 static_cast<unsigned>(parameters_buf.size()) | |
| 340 }; | |
| 341 | |
| 342 ec_parameters.data[0] = SEC_ASN1_OBJECT_ID; | |
| 343 ec_parameters.data[1] = static_cast<unsigned char>(oid_data->oid.len); | |
| 344 memcpy(ec_parameters.data + 2, oid_data->oid.data, oid_data->oid.len); | |
| 345 | |
| 346 result->key_ = PK11_GenerateKeyPair(slot, | |
| 347 CKM_EC_KEY_PAIR_GEN, | |
| 348 &ec_parameters, | |
| 349 &result->public_key_, | |
| 350 permanent, | |
| 351 sensitive, | |
| 352 NULL); | |
| 353 if (!result->key_) { | |
| 354 DLOG(ERROR) << "PK11_GenerateKeyPair: " << PORT_GetError(); | |
| 355 return NULL; | |
| 356 } | |
| 357 CHECK_EQ(ecKey, SECKEY_GetPublicKeyType(result->public_key_)); | |
| 358 | |
| 359 return result.release(); | |
| 360 } | |
| 361 | |
| 362 // static | |
| 363 ECPrivateKey* ECPrivateKey::CreateFromEncryptedPrivateKeyInfoWithParams( | |
| 364 PK11SlotInfo* slot, | |
| 365 const std::string& password, | |
| 366 const std::vector<uint8>& encrypted_private_key_info, | |
| 367 const std::vector<uint8>& subject_public_key_info, | |
| 368 bool permanent, | |
| 369 bool sensitive) { | |
| 370 scoped_ptr<ECPrivateKey> result(new ECPrivateKey); | |
| 371 | |
| 372 SECItem encoded_spki = { | |
| 373 siBuffer, | |
| 374 const_cast<unsigned char*>(&subject_public_key_info[0]), | |
| 375 static_cast<unsigned>(subject_public_key_info.size()) | |
| 376 }; | |
| 377 CERTSubjectPublicKeyInfo* decoded_spki = SECKEY_DecodeDERSubjectPublicKeyInfo( | |
| 378 &encoded_spki); | |
| 379 if (!decoded_spki) { | |
| 380 DLOG(ERROR) << "SECKEY_DecodeDERSubjectPublicKeyInfo: " << PORT_GetError(); | |
| 381 return NULL; | |
| 382 } | |
| 383 | |
| 384 bool success = ImportFromEncryptedPrivateKeyInfo( | |
| 385 slot, | |
| 386 password, | |
| 387 &encrypted_private_key_info[0], | |
| 388 encrypted_private_key_info.size(), | |
| 389 decoded_spki, | |
| 390 permanent, | |
| 391 sensitive, | |
| 392 &result->key_, | |
| 393 &result->public_key_); | |
| 394 | |
| 395 SECKEY_DestroySubjectPublicKeyInfo(decoded_spki); | |
| 396 | |
| 397 if (success) { | |
| 398 CHECK_EQ(ecKey, SECKEY_GetPublicKeyType(result->public_key_)); | |
| 399 return result.release(); | |
| 400 } | |
| 401 | |
| 402 return NULL; | |
| 403 } | |
| 404 | |
| 405 } // namespace crypto | |
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Chromium Code Reviews
Issue 956613002:
Reland "Cut down /crypto and switch what is left of it to boringssl". (Closed)
Base URL: git@github.com:domokit/mojo.git@master