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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/numerics/safe_math.h" | |
| 10 #include "base/stl_util.h" | |
| 11 #include "components/webcrypto/crypto_data.h" | |
| 12 #include "components/webcrypto/openssl/aes_algorithm_openssl.h" | |
| 13 #include "components/webcrypto/openssl/key_openssl.h" | |
| 14 #include "components/webcrypto/openssl/util_openssl.h" | |
| 15 #include "components/webcrypto/status.h" | |
| 16 #include "crypto/openssl_util.h" | |
| 17 #include "crypto/scoped_openssl_types.h" | |
| 18 | |
| 19 namespace webcrypto { | |
| 20 | |
| 21 namespace { | |
| 22 | |
| 23 const EVP_AEAD* GetAesKwAlgorithmFromKeySize(size_t key_size_bytes) { | |
| 24 switch (key_size_bytes) { | |
| 25 case 16: | |
| 26 return EVP_aead_aes_128_key_wrap(); | |
| 27 case 32: | |
| 28 return EVP_aead_aes_256_key_wrap(); | |
| 29 default: | |
| 30 return NULL; | |
| 31 } | |
| 32 } | |
| 33 | |
| 34 Status AesKwEncryptDecrypt(EncryptOrDecrypt mode, | |
| 35 const blink::WebCryptoAlgorithm& algorithm, | |
| 36 const blink::WebCryptoKey& key, | |
| 37 const CryptoData& data, | |
| 38 std::vector<uint8_t>* buffer) { | |
| 39 // These length checks are done in order to give a more specific error. These | |
| 40 // are not required for correctness. | |
| 41 if ((mode == ENCRYPT && data.byte_length() < 16) || | |
| 42 (mode == DECRYPT && data.byte_length() < 24)) { | |
| 43 return Status::ErrorDataTooSmall(); | |
| 44 } | |
| 45 if (data.byte_length() % 8) | |
| 46 return Status::ErrorInvalidAesKwDataLength(); | |
| 47 | |
| 48 const std::vector<uint8_t>& raw_key = | |
| 49 SymKeyOpenSsl::Cast(key)->raw_key_data(); | |
| 50 | |
| 51 return AeadEncryptDecrypt(mode, raw_key, data, | |
| 52 8, // tag_length_bytes | |
| 53 CryptoData(), // iv | |
| 54 CryptoData(), // additional_data | |
| 55 GetAesKwAlgorithmFromKeySize(raw_key.size()), | |
| 56 buffer); | |
| 57 } | |
| 58 | |
| 59 class AesKwImplementation : public AesAlgorithm { | |
| 60 public: | |
| 61 AesKwImplementation() | |
| 62 : AesAlgorithm( | |
| 63 blink::WebCryptoKeyUsageWrapKey | blink::WebCryptoKeyUsageUnwrapKey, | |
| 64 "KW") {} | |
| 65 | |
| 66 Status Encrypt(const blink::WebCryptoAlgorithm& algorithm, | |
| 67 const blink::WebCryptoKey& key, | |
| 68 const CryptoData& data, | |
| 69 std::vector<uint8_t>* buffer) const override { | |
| 70 return AesKwEncryptDecrypt(ENCRYPT, algorithm, key, data, buffer); | |
| 71 } | |
| 72 | |
| 73 Status Decrypt(const blink::WebCryptoAlgorithm& algorithm, | |
| 74 const blink::WebCryptoKey& key, | |
| 75 const CryptoData& data, | |
| 76 std::vector<uint8_t>* buffer) const override { | |
| 77 return AesKwEncryptDecrypt(DECRYPT, algorithm, key, data, buffer); | |
| 78 } | |
| 79 }; | |
| 80 | |
| 81 } // namespace | |
| 82 | |
| 83 AlgorithmImplementation* CreatePlatformAesKwImplementation() { | |
| 84 return new AesKwImplementation; | |
| 85 } | |
| 86 | |
| 87 } // 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