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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 <vector> | |
| 6 #include <openssl/evp.h> | |
| 7 | |
| 8 #include "base/logging.h" | |
| 9 #include "base/stl_util.h" | |
| 10 #include "components/webcrypto/crypto_data.h" | |
| 11 #include "components/webcrypto/openssl/aes_algorithm_openssl.h" | |
| 12 #include "components/webcrypto/openssl/key_openssl.h" | |
| 13 #include "components/webcrypto/openssl/util_openssl.h" | |
| 14 #include "components/webcrypto/status.h" | |
| 15 #include "components/webcrypto/webcrypto_util.h" | |
| 16 #include "crypto/openssl_util.h" | |
| 17 #include "crypto/scoped_openssl_types.h" | |
| 18 #include "third_party/WebKit/public/platform/WebCryptoAlgorithmParams.h" | |
| 19 | |
| 20 namespace webcrypto { | |
| 21 | |
| 22 namespace { | |
| 23 | |
| 24 const EVP_AEAD* GetAesGcmAlgorithmFromKeySize(size_t key_size_bytes) { | |
| 25 switch (key_size_bytes) { | |
| 26 case 16: | |
| 27 return EVP_aead_aes_128_gcm(); | |
| 28 case 32: | |
| 29 return EVP_aead_aes_256_gcm(); | |
| 30 default: | |
| 31 return NULL; | |
| 32 } | |
| 33 } | |
| 34 | |
| 35 Status AesGcmEncryptDecrypt(EncryptOrDecrypt mode, | |
| 36 const blink::WebCryptoAlgorithm& algorithm, | |
| 37 const blink::WebCryptoKey& key, | |
| 38 const CryptoData& data, | |
| 39 std::vector<uint8_t>* buffer) { | |
| 40 const std::vector<uint8_t>& raw_key = | |
| 41 SymKeyOpenSsl::Cast(key)->raw_key_data(); | |
| 42 const blink::WebCryptoAesGcmParams* params = algorithm.aesGcmParams(); | |
| 43 | |
| 44 unsigned int tag_length_bits; | |
| 45 Status status = GetAesGcmTagLengthInBits(params, &tag_length_bits); | |
| 46 if (status.IsError()) | |
| 47 return status; | |
| 48 | |
| 49 return AeadEncryptDecrypt( | |
| 50 mode, raw_key, data, tag_length_bits / 8, CryptoData(params->iv()), | |
| 51 CryptoData(params->optionalAdditionalData()), | |
| 52 GetAesGcmAlgorithmFromKeySize(raw_key.size()), buffer); | |
| 53 } | |
| 54 | |
| 55 class AesGcmImplementation : public AesAlgorithm { | |
| 56 public: | |
| 57 AesGcmImplementation() : AesAlgorithm("GCM") {} | |
| 58 | |
| 59 Status Encrypt(const blink::WebCryptoAlgorithm& algorithm, | |
| 60 const blink::WebCryptoKey& key, | |
| 61 const CryptoData& data, | |
| 62 std::vector<uint8_t>* buffer) const override { | |
| 63 return AesGcmEncryptDecrypt(ENCRYPT, algorithm, key, data, buffer); | |
| 64 } | |
| 65 | |
| 66 Status Decrypt(const blink::WebCryptoAlgorithm& algorithm, | |
| 67 const blink::WebCryptoKey& key, | |
| 68 const CryptoData& data, | |
| 69 std::vector<uint8_t>* buffer) const override { | |
| 70 return AesGcmEncryptDecrypt(DECRYPT, algorithm, key, data, buffer); | |
| 71 } | |
| 72 }; | |
| 73 | |
| 74 } // namespace | |
| 75 | |
| 76 AlgorithmImplementation* CreatePlatformAesGcmImplementation() { | |
| 77 return new AesGcmImplementation; | |
| 78 } | |
| 79 | |
| 80 } // namespace webcrypto | |
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Chromium Code Reviews
Issue 1304063015:
[refactor] Rename the webcrypto/openssl and webcrypto/test directories. (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@jwk_refactor