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| 1 // Copyright 2014 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 "net/ssl/openssl_platform_key.h" | |
| 6 | |
| 7 #include <windows.h> | |
| 8 #include <NCrypt.h> | |
| 9 | |
| 10 #include <string.h> | |
| 11 | |
| 12 #include <algorithm> | |
| 13 #include <vector> | |
| 14 | |
| 15 #include <openssl/bn.h> | |
| 16 #include <openssl/digest.h> | |
| 17 #include <openssl/ec_key.h> | |
| 18 #include <openssl/err.h> | |
| 19 #include <openssl/engine.h> | |
| 20 #include <openssl/evp.h> | |
| 21 #include <openssl/md5.h> | |
| 22 #include <openssl/obj_mac.h> | |
| 23 #include <openssl/rsa.h> | |
| 24 #include <openssl/sha.h> | |
| 25 #include <openssl/x509.h> | |
| 26 | |
| 27 #include "base/debug/debugger.h" | |
| 28 #include "base/debug/stack_trace.h" | |
| 29 #include "base/lazy_instance.h" | |
| 30 #include "base/logging.h" | |
| 31 #include "base/memory/scoped_ptr.h" | |
| 32 #include "base/win/windows_version.h" | |
| 33 #include "crypto/openssl_util.h" | |
| 34 #include "crypto/scoped_capi_types.h" | |
| 35 #include "crypto/wincrypt_shim.h" | |
| 36 #include "net/base/net_errors.h" | |
| 37 #include "net/cert/x509_certificate.h" | |
| 38 #include "net/ssl/openssl_ssl_util.h" | |
| 39 #include "net/ssl/scoped_openssl_types.h" | |
| 40 | |
| 41 namespace net { | |
| 42 | |
| 43 namespace { | |
| 44 | |
| 45 using NCryptFreeObjectFunc = SECURITY_STATUS(WINAPI*)(NCRYPT_HANDLE); | |
| 46 using NCryptSignHashFunc = SECURITY_STATUS(WINAPI*)(NCRYPT_KEY_HANDLE, // hKey | |
| 47 VOID*, // pPaddingInfo | |
| 48 BYTE*, // pbHashValue | |
| 49 DWORD, // cbHashValue | |
| 50 BYTE*, // pbSignature | |
| 51 DWORD, // cbSignature | |
| 52 DWORD*, // pcbResult | |
| 53 DWORD); // dwFlags | |
| 54 | |
| 55 class CNGFunctions { | |
| 56 public: | |
| 57 CNGFunctions() | |
| 58 : ncrypt_free_object_(nullptr), | |
| 59 ncrypt_sign_hash_(nullptr) { | |
| 60 HMODULE ncrypt = GetModuleHandle(L"ncrypt.dll"); | |
| 61 if (ncrypt != nullptr) { | |
| 62 ncrypt_free_object_ = reinterpret_cast<NCryptFreeObjectFunc>( | |
| 63 GetProcAddress(ncrypt, "NCryptFreeObject")); | |
| 64 ncrypt_sign_hash_ = reinterpret_cast<NCryptSignHashFunc>( | |
| 65 GetProcAddress(ncrypt, "NCryptSignHash")); | |
| 66 } | |
| 67 } | |
| 68 | |
| 69 NCryptFreeObjectFunc ncrypt_free_object() const { | |
| 70 return ncrypt_free_object_; | |
| 71 } | |
| 72 | |
| 73 NCryptSignHashFunc ncrypt_sign_hash() const { return ncrypt_sign_hash_; } | |
| 74 | |
| 75 private: | |
| 76 NCryptFreeObjectFunc ncrypt_free_object_; | |
| 77 NCryptSignHashFunc ncrypt_sign_hash_; | |
| 78 }; | |
| 79 | |
| 80 base::LazyInstance<CNGFunctions>::Leaky g_cng_functions = | |
| 81 LAZY_INSTANCE_INITIALIZER; | |
| 82 | |
| 83 struct CERT_KEY_CONTEXTDeleter { | |
| 84 void operator()(PCERT_KEY_CONTEXT key) { | |
| 85 if (key->dwKeySpec == CERT_NCRYPT_KEY_SPEC) { | |
| 86 g_cng_functions.Get().ncrypt_free_object()(key->hNCryptKey); | |
| 87 } else { | |
| 88 CryptReleaseContext(key->hCryptProv, 0); | |
| 89 } | |
| 90 delete key; | |
| 91 } | |
| 92 }; | |
| 93 | |
| 94 using ScopedCERT_KEY_CONTEXT = | |
| 95 scoped_ptr<CERT_KEY_CONTEXT, CERT_KEY_CONTEXTDeleter>; | |
| 96 | |
| 97 // KeyExData contains the data that is contained in the EX_DATA of the | |
| 98 // RSA and ECDSA objects that are created to wrap Windows system keys. | |
| 99 struct KeyExData { | |
| 100 KeyExData(ScopedCERT_KEY_CONTEXT key, size_t key_length) | |
| 101 : key(key.Pass()), key_length(key_length) {} | |
| 102 | |
| 103 ScopedCERT_KEY_CONTEXT key; | |
| 104 size_t key_length; | |
| 105 }; | |
| 106 | |
| 107 // ExDataDup is called when one of the RSA or EC_KEY objects is | |
| 108 // duplicated. This is not supported and should never happen. | |
| 109 int ExDataDup(CRYPTO_EX_DATA* to, | |
| 110 const CRYPTO_EX_DATA* from, | |
| 111 void** from_d, | |
| 112 int idx, | |
| 113 long argl, | |
| 114 void* argp) { | |
| 115 CHECK_EQ((void*)nullptr, *from_d); | |
| 116 return 0; | |
| 117 } | |
| 118 | |
| 119 // ExDataFree is called when one of the RSA or EC_KEY objects is freed. | |
| 120 void ExDataFree(void* parent, | |
| 121 void* ptr, | |
| 122 CRYPTO_EX_DATA* ex_data, | |
| 123 int idx, | |
| 124 long argl, | |
| 125 void* argp) { | |
| 126 KeyExData* data = reinterpret_cast<KeyExData*>(ptr); | |
| 127 delete data; | |
| 128 } | |
| 129 | |
| 130 extern const RSA_METHOD win_rsa_method; | |
| 131 extern const ECDSA_METHOD win_ecdsa_method; | |
| 132 | |
| 133 // BoringSSLEngine is a BoringSSL ENGINE that implements RSA and ECDSA | |
| 134 // by forwarding the requested operations to CAPI or CNG. | |
| 135 class BoringSSLEngine { | |
| 136 public: | |
| 137 BoringSSLEngine() | |
| 138 : rsa_index_(RSA_get_ex_new_index(0 /* argl */, | |
| 139 nullptr /* argp */, | |
| 140 nullptr /* new_func */, | |
| 141 ExDataDup, | |
| 142 ExDataFree)), | |
| 143 ec_key_index_(EC_KEY_get_ex_new_index(0 /* argl */, | |
| 144 nullptr /* argp */, | |
| 145 nullptr /* new_func */, | |
| 146 ExDataDup, | |
| 147 ExDataFree)), | |
| 148 engine_(ENGINE_new()) { | |
| 149 ENGINE_set_RSA_method(engine_, &win_rsa_method, sizeof(win_rsa_method)); | |
| 150 ENGINE_set_ECDSA_method(engine_, &win_ecdsa_method, | |
| 151 sizeof(win_ecdsa_method)); | |
| 152 } | |
| 153 | |
| 154 int rsa_ex_index() const { return rsa_index_; } | |
| 155 int ec_key_ex_index() const { return ec_key_index_; } | |
| 156 | |
| 157 const ENGINE* engine() const { return engine_; } | |
| 158 | |
| 159 private: | |
| 160 const int rsa_index_; | |
| 161 const int ec_key_index_; | |
| 162 ENGINE* const engine_; | |
| 163 }; | |
| 164 | |
| 165 base::LazyInstance<BoringSSLEngine>::Leaky global_boringssl_engine = | |
| 166 LAZY_INSTANCE_INITIALIZER; | |
| 167 | |
| 168 // Signs |in| with |key|, writing the output to |out| and the size to |out_len|. | |
| 169 // Although the buffer is preallocated, this calls NCryptSignHash twice. Some | |
| 170 // smartcards are buggy and assume the two-call pattern. See | |
| 171 // https://crbug.com/470204. Returns true on success and false on error. | |
| 172 bool DoNCryptSignHash(NCRYPT_KEY_HANDLE key, | |
| 173 void* padding, | |
| 174 const BYTE* in, | |
| 175 DWORD in_len, | |
| 176 BYTE* out, | |
| 177 DWORD max_out, | |
| 178 DWORD* out_len, | |
| 179 DWORD flags) { | |
| 180 // Determine the output length. | |
| 181 DWORD signature_len; | |
| 182 SECURITY_STATUS ncrypt_status = g_cng_functions.Get().ncrypt_sign_hash()( | |
| 183 key, padding, const_cast<BYTE*>(in), in_len, nullptr, 0, &signature_len, | |
| 184 flags); | |
| 185 if (FAILED(ncrypt_status)) { | |
| 186 LOG(ERROR) << "NCryptSignHash failed: " << ncrypt_status; | |
| 187 return false; | |
| 188 } | |
| 189 // Check |max_out| externally rather than trust the smartcard. | |
| 190 if (signature_len == 0 || signature_len > max_out) { | |
| 191 LOG(ERROR) << "Bad signature length."; | |
| 192 return false; | |
| 193 } | |
| 194 // It is important that |signature_len| already be initialized with the | |
| 195 // correct size. Some smartcards are buggy and do not write to it on the | |
| 196 // second call. | |
| 197 ncrypt_status = g_cng_functions.Get().ncrypt_sign_hash()( | |
| 198 key, padding, const_cast<BYTE*>(in), in_len, out, signature_len, | |
| 199 &signature_len, flags); | |
| 200 if (FAILED(ncrypt_status)) { | |
| 201 LOG(ERROR) << "NCryptSignHash failed: " << ncrypt_status; | |
| 202 return false; | |
| 203 } | |
| 204 if (signature_len == 0) { | |
| 205 LOG(ERROR) << "Bad signature length."; | |
| 206 return false; | |
| 207 } | |
| 208 *out_len = signature_len; | |
| 209 return true; | |
| 210 } | |
| 211 | |
| 212 // Custom RSA_METHOD that uses the platform APIs for signing. | |
| 213 | |
| 214 const KeyExData* RsaGetExData(const RSA* rsa) { | |
| 215 return reinterpret_cast<const KeyExData*>( | |
| 216 RSA_get_ex_data(rsa, global_boringssl_engine.Get().rsa_ex_index())); | |
| 217 } | |
| 218 | |
| 219 size_t RsaMethodSize(const RSA* rsa) { | |
| 220 const KeyExData* ex_data = RsaGetExData(rsa); | |
| 221 return (ex_data->key_length + 7) / 8; | |
| 222 } | |
| 223 | |
| 224 int RsaMethodSign(int hash_nid, | |
| 225 const uint8_t* in, | |
| 226 unsigned in_len, | |
| 227 uint8_t* out, | |
| 228 unsigned* out_len, | |
| 229 const RSA* rsa) { | |
| 230 // TODO(davidben): Switch BoringSSL's sign hook to using size_t rather than | |
| 231 // unsigned. | |
| 232 const KeyExData* ex_data = RsaGetExData(rsa); | |
| 233 if (!ex_data) { | |
| 234 NOTREACHED(); | |
| 235 OPENSSL_PUT_ERROR(RSA, RSA_sign, ERR_R_INTERNAL_ERROR); | |
| 236 return 0; | |
| 237 } | |
| 238 | |
| 239 if (ex_data->key->dwKeySpec == CERT_NCRYPT_KEY_SPEC) { | |
| 240 BCRYPT_PKCS1_PADDING_INFO rsa_padding_info; | |
| 241 switch (hash_nid) { | |
| 242 case NID_md5_sha1: | |
| 243 rsa_padding_info.pszAlgId = nullptr; | |
| 244 break; | |
| 245 case NID_sha1: | |
| 246 rsa_padding_info.pszAlgId = BCRYPT_SHA1_ALGORITHM; | |
| 247 break; | |
| 248 case NID_sha256: | |
| 249 rsa_padding_info.pszAlgId = BCRYPT_SHA256_ALGORITHM; | |
| 250 break; | |
| 251 case NID_sha384: | |
| 252 rsa_padding_info.pszAlgId = BCRYPT_SHA384_ALGORITHM; | |
| 253 break; | |
| 254 case NID_sha512: | |
| 255 rsa_padding_info.pszAlgId = BCRYPT_SHA512_ALGORITHM; | |
| 256 break; | |
| 257 default: | |
| 258 OPENSSL_PUT_ERROR(RSA, RSA_sign, RSA_R_UNKNOWN_ALGORITHM_TYPE); | |
| 259 return 0; | |
| 260 } | |
| 261 | |
| 262 DWORD signature_len; | |
| 263 if (!DoNCryptSignHash(ex_data->key->hNCryptKey, &rsa_padding_info, in, | |
| 264 in_len, out, RSA_size(rsa), &signature_len, | |
| 265 BCRYPT_PAD_PKCS1)) { | |
| 266 OpenSSLPutNetError(FROM_HERE, ERR_SSL_CLIENT_AUTH_SIGNATURE_FAILED); | |
| 267 return 0; | |
| 268 } | |
| 269 *out_len = signature_len; | |
| 270 return 1; | |
| 271 } | |
| 272 | |
| 273 ALG_ID hash_alg; | |
| 274 switch (hash_nid) { | |
| 275 case NID_md5_sha1: | |
| 276 hash_alg = CALG_SSL3_SHAMD5; | |
| 277 break; | |
| 278 case NID_sha1: | |
| 279 hash_alg = CALG_SHA1; | |
| 280 break; | |
| 281 case NID_sha256: | |
| 282 hash_alg = CALG_SHA_256; | |
| 283 break; | |
| 284 case NID_sha384: | |
| 285 hash_alg = CALG_SHA_384; | |
| 286 break; | |
| 287 case NID_sha512: | |
| 288 hash_alg = CALG_SHA_512; | |
| 289 break; | |
| 290 default: | |
| 291 OPENSSL_PUT_ERROR(RSA, RSA_sign, RSA_R_UNKNOWN_ALGORITHM_TYPE); | |
| 292 return 0; | |
| 293 } | |
| 294 | |
| 295 crypto::ScopedHCRYPTHASH hash; | |
| 296 if (!CryptCreateHash(ex_data->key->hCryptProv, hash_alg, 0, 0, | |
| 297 hash.receive())) { | |
| 298 PLOG(ERROR) << "CreateCreateHash failed"; | |
| 299 OpenSSLPutNetError(FROM_HERE, ERR_SSL_CLIENT_AUTH_SIGNATURE_FAILED); | |
| 300 return 0; | |
| 301 } | |
| 302 DWORD hash_len; | |
| 303 DWORD arg_len = sizeof(hash_len); | |
| 304 if (!CryptGetHashParam(hash.get(), HP_HASHSIZE, | |
| 305 reinterpret_cast<BYTE*>(&hash_len), &arg_len, 0)) { | |
| 306 PLOG(ERROR) << "CryptGetHashParam HP_HASHSIZE failed"; | |
| 307 OpenSSLPutNetError(FROM_HERE, ERR_SSL_CLIENT_AUTH_SIGNATURE_FAILED); | |
| 308 return 0; | |
| 309 } | |
| 310 if (hash_len != in_len) { | |
| 311 OpenSSLPutNetError(FROM_HERE, ERR_SSL_CLIENT_AUTH_SIGNATURE_FAILED); | |
| 312 return 0; | |
| 313 } | |
| 314 if (!CryptSetHashParam(hash.get(), HP_HASHVAL, const_cast<BYTE*>(in), 0)) { | |
| 315 PLOG(ERROR) << "CryptSetHashParam HP_HASHVAL failed"; | |
| 316 OpenSSLPutNetError(FROM_HERE, ERR_SSL_CLIENT_AUTH_SIGNATURE_FAILED); | |
| 317 return 0; | |
| 318 } | |
| 319 DWORD signature_len = RSA_size(rsa); | |
| 320 if (!CryptSignHash(hash.get(), ex_data->key->dwKeySpec, nullptr, 0, out, | |
| 321 &signature_len)) { | |
| 322 PLOG(ERROR) << "CryptSignHash failed"; | |
| 323 OpenSSLPutNetError(FROM_HERE, ERR_SSL_CLIENT_AUTH_SIGNATURE_FAILED); | |
| 324 return 0; | |
| 325 } | |
| 326 | |
| 327 /* CryptoAPI signs in little-endian, so reverse it. */ | |
| 328 std::reverse(out, out + signature_len); | |
| 329 *out_len = signature_len; | |
| 330 return 1; | |
| 331 } | |
| 332 | |
| 333 int RsaMethodEncrypt(RSA* rsa, | |
| 334 size_t* out_len, | |
| 335 uint8_t* out, | |
| 336 size_t max_out, | |
| 337 const uint8_t* in, | |
| 338 size_t in_len, | |
| 339 int padding) { | |
| 340 NOTIMPLEMENTED(); | |
| 341 OPENSSL_PUT_ERROR(RSA, encrypt, RSA_R_UNKNOWN_ALGORITHM_TYPE); | |
| 342 return 0; | |
| 343 } | |
| 344 | |
| 345 int RsaMethodSignRaw(RSA* rsa, | |
| 346 size_t* out_len, | |
| 347 uint8_t* out, | |
| 348 size_t max_out, | |
| 349 const uint8_t* in, | |
| 350 size_t in_len, | |
| 351 int padding) { | |
| 352 NOTIMPLEMENTED(); | |
| 353 OPENSSL_PUT_ERROR(RSA, encrypt, RSA_R_UNKNOWN_ALGORITHM_TYPE); | |
| 354 return 0; | |
| 355 } | |
| 356 | |
| 357 int RsaMethodDecrypt(RSA* rsa, | |
| 358 size_t* out_len, | |
| 359 uint8_t* out, | |
| 360 size_t max_out, | |
| 361 const uint8_t* in, | |
| 362 size_t in_len, | |
| 363 int padding) { | |
| 364 NOTIMPLEMENTED(); | |
| 365 OPENSSL_PUT_ERROR(RSA, decrypt, RSA_R_UNKNOWN_ALGORITHM_TYPE); | |
| 366 return 0; | |
| 367 } | |
| 368 | |
| 369 int RsaMethodVerifyRaw(RSA* rsa, | |
| 370 size_t* out_len, | |
| 371 uint8_t* out, | |
| 372 size_t max_out, | |
| 373 const uint8_t* in, | |
| 374 size_t in_len, | |
| 375 int padding) { | |
| 376 NOTIMPLEMENTED(); | |
| 377 OPENSSL_PUT_ERROR(RSA, verify_raw, RSA_R_UNKNOWN_ALGORITHM_TYPE); | |
| 378 return 0; | |
| 379 } | |
| 380 | |
| 381 int RsaMethodSupportsDigest(const RSA* rsa, const EVP_MD* md) { | |
| 382 const KeyExData* ex_data = RsaGetExData(rsa); | |
| 383 if (!ex_data) { | |
| 384 NOTREACHED(); | |
| 385 return 0; | |
| 386 } | |
| 387 | |
| 388 int hash_nid = EVP_MD_type(md); | |
| 389 if (ex_data->key->dwKeySpec == CERT_NCRYPT_KEY_SPEC) { | |
| 390 // Only hashes which appear in RsaSignPKCS1 are supported. | |
| 391 if (hash_nid != NID_sha1 && hash_nid != NID_sha256 && | |
| 392 hash_nid != NID_sha384 && hash_nid != NID_sha512) { | |
| 393 return 0; | |
| 394 } | |
| 395 | |
| 396 // If the key is a 1024-bit RSA, assume conservatively that it may only be | |
| 397 // able to sign SHA-1 hashes. This is the case for older Estonian ID cards | |
| 398 // that have 1024-bit RSA keys. | |
| 399 // | |
| 400 // CNG does provide NCryptIsAlgSupported and NCryptEnumAlgorithms functions, | |
| 401 // however they seem to both return NTE_NOT_SUPPORTED when querying the | |
| 402 // NCRYPT_PROV_HANDLE at the key's NCRYPT_PROVIDER_HANDLE_PROPERTY. | |
| 403 if (ex_data->key_length <= 1024 && hash_nid != NID_sha1) | |
| 404 return 0; | |
| 405 | |
| 406 return 1; | |
| 407 } else { | |
| 408 // If the key is in CAPI, assume conservatively that the CAPI service | |
| 409 // provider may only be able to sign SHA-1 hashes. | |
| 410 return hash_nid == NID_sha1; | |
| 411 } | |
| 412 } | |
| 413 | |
| 414 const RSA_METHOD win_rsa_method = { | |
| 415 { | |
| 416 0, // references | |
| 417 1, // is_static | |
| 418 }, | |
| 419 nullptr, // app_data | |
| 420 | |
| 421 nullptr, // init | |
| 422 nullptr, // finish | |
| 423 RsaMethodSize, | |
| 424 RsaMethodSign, | |
| 425 nullptr, // verify | |
| 426 RsaMethodEncrypt, | |
| 427 RsaMethodSignRaw, | |
| 428 RsaMethodDecrypt, | |
| 429 RsaMethodVerifyRaw, | |
| 430 nullptr, // private_transform | |
| 431 nullptr, // mod_exp | |
| 432 nullptr, // bn_mod_exp | |
| 433 RSA_FLAG_OPAQUE, | |
| 434 nullptr, // keygen | |
| 435 nullptr, // multi_prime_keygen | |
| 436 RsaMethodSupportsDigest, | |
| 437 }; | |
| 438 | |
| 439 // Custom ECDSA_METHOD that uses the platform APIs. | |
| 440 // Note that for now, only signing through ECDSA_sign() is really supported. | |
| 441 // all other method pointers are either stubs returning errors, or no-ops. | |
| 442 | |
| 443 const KeyExData* EcKeyGetExData(const EC_KEY* ec_key) { | |
| 444 return reinterpret_cast<const KeyExData*>(EC_KEY_get_ex_data( | |
| 445 ec_key, global_boringssl_engine.Get().ec_key_ex_index())); | |
| 446 } | |
| 447 | |
| 448 size_t EcdsaMethodGroupOrderSize(const EC_KEY* ec_key) { | |
| 449 const KeyExData* ex_data = EcKeyGetExData(ec_key); | |
| 450 // key_length is the size of the group order for EC keys. | |
| 451 return (ex_data->key_length + 7) / 8; | |
| 452 } | |
| 453 | |
| 454 int EcdsaMethodSign(const uint8_t* digest, | |
| 455 size_t digest_len, | |
| 456 uint8_t* out_sig, | |
| 457 unsigned int* out_sig_len, | |
| 458 EC_KEY* ec_key) { | |
| 459 const KeyExData* ex_data = EcKeyGetExData(ec_key); | |
| 460 // Only CNG supports ECDSA. | |
| 461 if (!ex_data || ex_data->key->dwKeySpec != CERT_NCRYPT_KEY_SPEC) { | |
| 462 NOTREACHED(); | |
| 463 OPENSSL_PUT_ERROR(RSA, sign_raw, ERR_R_INTERNAL_ERROR); | |
| 464 return 0; | |
| 465 } | |
| 466 | |
| 467 // An ECDSA signature is two integers, modulo the order of the group. | |
| 468 size_t order_len = (ex_data->key_length + 7) / 8; | |
| 469 if (order_len == 0) { | |
| 470 NOTREACHED(); | |
| 471 OpenSSLPutNetError(FROM_HERE, ERR_SSL_CLIENT_AUTH_SIGNATURE_FAILED); | |
| 472 return 0; | |
| 473 } | |
| 474 std::vector<uint8_t> raw_sig(order_len * 2); | |
| 475 | |
| 476 DWORD signature_len; | |
| 477 if (!DoNCryptSignHash(ex_data->key->hNCryptKey, nullptr, digest, digest_len, | |
| 478 &raw_sig[0], raw_sig.size(), &signature_len, 0)) { | |
| 479 OpenSSLPutNetError(FROM_HERE, ERR_SSL_CLIENT_AUTH_SIGNATURE_FAILED); | |
| 480 return 0; | |
| 481 } | |
| 482 if (signature_len != raw_sig.size()) { | |
| 483 LOG(ERROR) << "Bad signature length"; | |
| 484 OpenSSLPutNetError(FROM_HERE, ERR_SSL_CLIENT_AUTH_SIGNATURE_FAILED); | |
| 485 return 0; | |
| 486 } | |
| 487 | |
| 488 // Convert the RAW ECDSA signature to a DER-encoded ECDSA-Sig-Value. | |
| 489 crypto::ScopedECDSA_SIG sig(ECDSA_SIG_new()); | |
| 490 if (!sig) { | |
| 491 OpenSSLPutNetError(FROM_HERE, ERR_SSL_CLIENT_AUTH_SIGNATURE_FAILED); | |
| 492 return 0; | |
| 493 } | |
| 494 sig->r = BN_bin2bn(&raw_sig[0], order_len, nullptr); | |
| 495 sig->s = BN_bin2bn(&raw_sig[order_len], order_len, nullptr); | |
| 496 if (!sig->r || !sig->s) { | |
| 497 OpenSSLPutNetError(FROM_HERE, ERR_SSL_CLIENT_AUTH_SIGNATURE_FAILED); | |
| 498 return 0; | |
| 499 } | |
| 500 | |
| 501 // Ensure the DER-encoded signature fits in the bounds. | |
| 502 int len = i2d_ECDSA_SIG(sig.get(), nullptr); | |
| 503 if (len < 0 || static_cast<size_t>(len) > ECDSA_size(ec_key)) { | |
| 504 OpenSSLPutNetError(FROM_HERE, ERR_SSL_CLIENT_AUTH_SIGNATURE_FAILED); | |
| 505 return 0; | |
| 506 } | |
| 507 | |
| 508 len = i2d_ECDSA_SIG(sig.get(), &out_sig); | |
| 509 if (len < 0) { | |
| 510 OpenSSLPutNetError(FROM_HERE, ERR_SSL_CLIENT_AUTH_SIGNATURE_FAILED); | |
| 511 return 0; | |
| 512 } | |
| 513 *out_sig_len = len; | |
| 514 return 1; | |
| 515 } | |
| 516 | |
| 517 int EcdsaMethodVerify(const uint8_t* digest, | |
| 518 size_t digest_len, | |
| 519 const uint8_t* sig, | |
| 520 size_t sig_len, | |
| 521 EC_KEY* eckey) { | |
| 522 NOTIMPLEMENTED(); | |
| 523 OPENSSL_PUT_ERROR(ECDSA, ECDSA_do_verify, ECDSA_R_NOT_IMPLEMENTED); | |
| 524 return 0; | |
| 525 } | |
| 526 | |
| 527 const ECDSA_METHOD win_ecdsa_method = { | |
| 528 { | |
| 529 0, // references | |
| 530 1, // is_static | |
| 531 }, | |
| 532 nullptr, // app_data | |
| 533 | |
| 534 nullptr, // init | |
| 535 nullptr, // finish | |
| 536 EcdsaMethodGroupOrderSize, | |
| 537 EcdsaMethodSign, | |
| 538 EcdsaMethodVerify, | |
| 539 ECDSA_FLAG_OPAQUE, | |
| 540 }; | |
| 541 | |
| 542 // Determines the key type and length of |certificate|'s public key. The type is | |
| 543 // returned as an OpenSSL EVP_PKEY type. The key length for RSA key is the size | |
| 544 // of the RSA modulus in bits. For an ECDSA key, it is the number of bits to | |
| 545 // represent the group order. It returns true on success and false on failure. | |
| 546 bool GetKeyInfo(const X509Certificate* certificate, | |
| 547 int* out_type, | |
| 548 size_t* out_length) { | |
| 549 crypto::OpenSSLErrStackTracer tracker(FROM_HERE); | |
| 550 | |
| 551 std::string der_encoded; | |
| 552 if (!X509Certificate::GetDEREncoded(certificate->os_cert_handle(), | |
| 553 &der_encoded)) | |
| 554 return false; | |
| 555 const uint8_t* bytes = reinterpret_cast<const uint8_t*>(der_encoded.data()); | |
| 556 ScopedX509 x509(d2i_X509(NULL, &bytes, der_encoded.size())); | |
| 557 if (!x509) | |
| 558 return false; | |
| 559 crypto::ScopedEVP_PKEY key(X509_get_pubkey(x509.get())); | |
| 560 if (!key) | |
| 561 return false; | |
| 562 *out_type = EVP_PKEY_id(key.get()); | |
| 563 *out_length = EVP_PKEY_bits(key.get()); | |
| 564 return true; | |
| 565 } | |
| 566 | |
| 567 crypto::ScopedEVP_PKEY CreateRSAWrapper(ScopedCERT_KEY_CONTEXT key, | |
| 568 size_t key_length) { | |
| 569 crypto::ScopedRSA rsa(RSA_new_method(global_boringssl_engine.Get().engine())); | |
| 570 if (!rsa) | |
| 571 return nullptr; | |
| 572 | |
| 573 RSA_set_ex_data(rsa.get(), global_boringssl_engine.Get().rsa_ex_index(), | |
| 574 new KeyExData(key.Pass(), key_length)); | |
| 575 | |
| 576 crypto::ScopedEVP_PKEY pkey(EVP_PKEY_new()); | |
| 577 if (!pkey || !EVP_PKEY_set1_RSA(pkey.get(), rsa.get())) | |
| 578 return nullptr; | |
| 579 return pkey.Pass(); | |
| 580 } | |
| 581 | |
| 582 crypto::ScopedEVP_PKEY CreateECDSAWrapper(ScopedCERT_KEY_CONTEXT key, | |
| 583 size_t key_length) { | |
| 584 crypto::ScopedEC_KEY ec_key( | |
| 585 EC_KEY_new_method(global_boringssl_engine.Get().engine())); | |
| 586 if (!ec_key) | |
| 587 return nullptr; | |
| 588 | |
| 589 EC_KEY_set_ex_data(ec_key.get(), | |
| 590 global_boringssl_engine.Get().ec_key_ex_index(), | |
| 591 new KeyExData(key.Pass(), key_length)); | |
| 592 | |
| 593 crypto::ScopedEVP_PKEY pkey(EVP_PKEY_new()); | |
| 594 if (!pkey || !EVP_PKEY_set1_EC_KEY(pkey.get(), ec_key.get())) | |
| 595 return nullptr; | |
| 596 | |
| 597 return pkey.Pass(); | |
| 598 } | |
| 599 | |
| 600 } // namespace | |
| 601 | |
| 602 crypto::ScopedEVP_PKEY FetchClientCertPrivateKey( | |
| 603 const X509Certificate* certificate) { | |
| 604 PCCERT_CONTEXT cert_context = certificate->os_cert_handle(); | |
| 605 | |
| 606 HCRYPTPROV_OR_NCRYPT_KEY_HANDLE crypt_prov = 0; | |
| 607 DWORD key_spec = 0; | |
| 608 BOOL must_free = FALSE; | |
| 609 DWORD flags = 0; | |
| 610 if (base::win::GetVersion() >= base::win::VERSION_VISTA) | |
| 611 flags |= CRYPT_ACQUIRE_PREFER_NCRYPT_KEY_FLAG; | |
| 612 | |
| 613 if (!CryptAcquireCertificatePrivateKey(cert_context, flags, nullptr, | |
| 614 &crypt_prov, &key_spec, &must_free)) { | |
| 615 PLOG(WARNING) << "Could not acquire private key"; | |
| 616 return nullptr; | |
| 617 } | |
| 618 | |
| 619 // Should never get a cached handle back - ownership must always be | |
| 620 // transferred. | |
| 621 CHECK_EQ(must_free, TRUE); | |
| 622 ScopedCERT_KEY_CONTEXT key(new CERT_KEY_CONTEXT); | |
| 623 key->dwKeySpec = key_spec; | |
| 624 key->hCryptProv = crypt_prov; | |
| 625 | |
| 626 // Rather than query the private key for metadata, extract the public key from | |
| 627 // the certificate without using Windows APIs. CAPI and CNG do not | |
| 628 // consistently work depending on the system. See https://crbug.com/468345. | |
| 629 int key_type; | |
| 630 size_t key_length; | |
| 631 if (!GetKeyInfo(certificate, &key_type, &key_length)) | |
| 632 return nullptr; | |
| 633 | |
| 634 switch (key_type) { | |
| 635 case EVP_PKEY_RSA: | |
| 636 return CreateRSAWrapper(key.Pass(), key_length); | |
| 637 case EVP_PKEY_EC: | |
| 638 return CreateECDSAWrapper(key.Pass(), key_length); | |
| 639 default: | |
| 640 return nullptr; | |
| 641 } | |
| 642 } | |
| 643 | |
| 644 } // namespace net | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 1178193002:
Sign CertificateVerify messages on a background thread. (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master