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1 // Copyright 2014 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include <openssl/hmac.h> | 5 #include <openssl/hmac.h> |
6 | 6 |
7 #include "base/logging.h" | 7 #include "base/logging.h" |
8 #include "base/numerics/safe_math.h" | 8 #include "base/numerics/safe_math.h" |
9 #include "base/stl_util.h" | |
10 #include "components/webcrypto/algorithm_implementation.h" | 9 #include "components/webcrypto/algorithm_implementation.h" |
11 #include "components/webcrypto/algorithms/secret_key_util.h" | 10 #include "components/webcrypto/algorithms/secret_key_util.h" |
12 #include "components/webcrypto/algorithms/util.h" | 11 #include "components/webcrypto/algorithms/util.h" |
13 #include "components/webcrypto/blink_key_handle.h" | 12 #include "components/webcrypto/blink_key_handle.h" |
14 #include "components/webcrypto/crypto_data.h" | 13 #include "components/webcrypto/crypto_data.h" |
15 #include "components/webcrypto/jwk.h" | 14 #include "components/webcrypto/jwk.h" |
16 #include "components/webcrypto/status.h" | 15 #include "components/webcrypto/status.h" |
17 #include "crypto/openssl_util.h" | 16 #include "crypto/openssl_util.h" |
18 #include "crypto/secure_util.h" | 17 #include "crypto/secure_util.h" |
19 #include "third_party/WebKit/public/platform/WebCryptoAlgorithmParams.h" | 18 #include "third_party/WebKit/public/platform/WebCryptoAlgorithmParams.h" |
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88 std::vector<uint8_t>* buffer) { | 87 std::vector<uint8_t>* buffer) { |
89 crypto::OpenSSLErrStackTracer err_tracer(FROM_HERE); | 88 crypto::OpenSSLErrStackTracer err_tracer(FROM_HERE); |
90 | 89 |
91 const EVP_MD* digest_algorithm = GetDigest(hash); | 90 const EVP_MD* digest_algorithm = GetDigest(hash); |
92 if (!digest_algorithm) | 91 if (!digest_algorithm) |
93 return Status::ErrorUnsupported(); | 92 return Status::ErrorUnsupported(); |
94 size_t hmac_expected_length = EVP_MD_size(digest_algorithm); | 93 size_t hmac_expected_length = EVP_MD_size(digest_algorithm); |
95 | 94 |
96 buffer->resize(hmac_expected_length); | 95 buffer->resize(hmac_expected_length); |
97 crypto::ScopedOpenSSLSafeSizeBuffer<EVP_MAX_MD_SIZE> hmac_result( | 96 crypto::ScopedOpenSSLSafeSizeBuffer<EVP_MAX_MD_SIZE> hmac_result( |
98 vector_as_array(buffer), hmac_expected_length); | 97 buffer->data(), hmac_expected_length); |
99 | 98 |
100 unsigned int hmac_actual_length; | 99 unsigned int hmac_actual_length; |
101 unsigned char* const success = HMAC( | 100 unsigned char* const success = |
102 digest_algorithm, vector_as_array(&raw_key), raw_key.size(), data.bytes(), | 101 HMAC(digest_algorithm, raw_key.data(), raw_key.size(), data.bytes(), |
103 data.byte_length(), hmac_result.safe_buffer(), &hmac_actual_length); | 102 data.byte_length(), hmac_result.safe_buffer(), &hmac_actual_length); |
104 if (!success || hmac_actual_length != hmac_expected_length) | 103 if (!success || hmac_actual_length != hmac_expected_length) |
105 return Status::OperationError(); | 104 return Status::OperationError(); |
106 | 105 |
107 return Status::Success(); | 106 return Status::Success(); |
108 } | 107 } |
109 | 108 |
110 class HmacImplementation : public AlgorithmImplementation { | 109 class HmacImplementation : public AlgorithmImplementation { |
111 public: | 110 public: |
112 HmacImplementation() {} | 111 HmacImplementation() {} |
113 | 112 |
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243 const CryptoData& signature, | 242 const CryptoData& signature, |
244 const CryptoData& data, | 243 const CryptoData& data, |
245 bool* signature_match) const override { | 244 bool* signature_match) const override { |
246 std::vector<uint8_t> result; | 245 std::vector<uint8_t> result; |
247 Status status = Sign(algorithm, key, data, &result); | 246 Status status = Sign(algorithm, key, data, &result); |
248 | 247 |
249 if (status.IsError()) | 248 if (status.IsError()) |
250 return status; | 249 return status; |
251 | 250 |
252 // Do not allow verification of truncated MACs. | 251 // Do not allow verification of truncated MACs. |
253 *signature_match = | 252 *signature_match = result.size() == signature.byte_length() && |
254 result.size() == signature.byte_length() && | 253 crypto::SecureMemEqual(result.data(), signature.bytes(), |
255 crypto::SecureMemEqual(vector_as_array(&result), signature.bytes(), | 254 signature.byte_length()); |
256 signature.byte_length()); | |
257 | 255 |
258 return Status::Success(); | 256 return Status::Success(); |
259 } | 257 } |
260 | 258 |
261 Status DeserializeKeyForClone(const blink::WebCryptoKeyAlgorithm& algorithm, | 259 Status DeserializeKeyForClone(const blink::WebCryptoKeyAlgorithm& algorithm, |
262 blink::WebCryptoKeyType type, | 260 blink::WebCryptoKeyType type, |
263 bool extractable, | 261 bool extractable, |
264 blink::WebCryptoKeyUsageMask usages, | 262 blink::WebCryptoKeyUsageMask usages, |
265 const CryptoData& key_data, | 263 const CryptoData& key_data, |
266 blink::WebCryptoKey* key) const override { | 264 blink::WebCryptoKey* key) const override { |
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286 } | 284 } |
287 }; | 285 }; |
288 | 286 |
289 } // namespace | 287 } // namespace |
290 | 288 |
291 scoped_ptr<AlgorithmImplementation> CreateHmacImplementation() { | 289 scoped_ptr<AlgorithmImplementation> CreateHmacImplementation() { |
292 return make_scoped_ptr(new HmacImplementation); | 290 return make_scoped_ptr(new HmacImplementation); |
293 } | 291 } |
294 | 292 |
295 } // namespace webcrypto | 293 } // namespace webcrypto |
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