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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 "content/child/webcrypto/crypto_data.h" | 5 #include "content/child/webcrypto/crypto_data.h" |
| 6 #include "content/child/webcrypto/nss/aes_key_nss.h" | 6 #include "content/child/webcrypto/nss/aes_key_nss.h" |
| 7 #include "content/child/webcrypto/nss/key_nss.h" | 7 #include "content/child/webcrypto/nss/key_nss.h" |
| 8 #include "content/child/webcrypto/nss/util_nss.h" | 8 #include "content/child/webcrypto/nss/util_nss.h" |
| 9 #include "content/child/webcrypto/status.h" | 9 #include "content/child/webcrypto/status.h" |
| 10 #include "content/child/webcrypto/webcrypto_util.h" | 10 #include "content/child/webcrypto/webcrypto_util.h" |
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| 49 "NSS version doesn't support AES-GCM. Try using version 3.15 or later"); | 49 "NSS version doesn't support AES-GCM. Try using version 3.15 or later"); |
| 50 } | 50 } |
| 51 | 51 |
| 52 // Helper to either encrypt or decrypt for AES-GCM. The result of encryption is | 52 // Helper to either encrypt or decrypt for AES-GCM. The result of encryption is |
| 53 // the concatenation of the ciphertext and the authentication tag. Similarly, | 53 // the concatenation of the ciphertext and the authentication tag. Similarly, |
| 54 // this is the expectation for the input to decryption. | 54 // this is the expectation for the input to decryption. |
| 55 Status AesGcmEncryptDecrypt(EncryptOrDecrypt mode, | 55 Status AesGcmEncryptDecrypt(EncryptOrDecrypt mode, |
| 56 const blink::WebCryptoAlgorithm& algorithm, | 56 const blink::WebCryptoAlgorithm& algorithm, |
| 57 const blink::WebCryptoKey& key, | 57 const blink::WebCryptoKey& key, |
| 58 const CryptoData& data, | 58 const CryptoData& data, |
| 59 std::vector<uint8>* buffer) { | 59 std::vector<uint8_t>* buffer) { |
| 60 Status status = NssSupportsAesGcm(); | 60 Status status = NssSupportsAesGcm(); |
| 61 if (status.IsError()) | 61 if (status.IsError()) |
| 62 return status; | 62 return status; |
| 63 | 63 |
| 64 PK11SymKey* sym_key = SymKeyNss::Cast(key)->key(); | 64 PK11SymKey* sym_key = SymKeyNss::Cast(key)->key(); |
| 65 const blink::WebCryptoAesGcmParams* params = algorithm.aesGcmParams(); | 65 const blink::WebCryptoAesGcmParams* params = algorithm.aesGcmParams(); |
| 66 if (!params) | 66 if (!params) |
| 67 return Status::ErrorUnexpected(); | 67 return Status::ErrorUnexpected(); |
| 68 | 68 |
| 69 unsigned int tag_length_bits; | 69 unsigned int tag_length_bits; |
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| 158 // Prevent generating AES-GCM keys if it is unavailable. | 158 // Prevent generating AES-GCM keys if it is unavailable. |
| 159 Status status = NssSupportsAesGcm(); | 159 Status status = NssSupportsAesGcm(); |
| 160 if (status.IsError()) | 160 if (status.IsError()) |
| 161 return status; | 161 return status; |
| 162 return AesAlgorithm::VerifyKeyUsagesBeforeGenerateKey(usage_mask); | 162 return AesAlgorithm::VerifyKeyUsagesBeforeGenerateKey(usage_mask); |
| 163 } | 163 } |
| 164 | 164 |
| 165 virtual Status Encrypt(const blink::WebCryptoAlgorithm& algorithm, | 165 virtual Status Encrypt(const blink::WebCryptoAlgorithm& algorithm, |
| 166 const blink::WebCryptoKey& key, | 166 const blink::WebCryptoKey& key, |
| 167 const CryptoData& data, | 167 const CryptoData& data, |
| 168 std::vector<uint8>* buffer) const OVERRIDE { | 168 std::vector<uint8_t>* buffer) const OVERRIDE { |
| 169 return AesGcmEncryptDecrypt(ENCRYPT, algorithm, key, data, buffer); | 169 return AesGcmEncryptDecrypt(ENCRYPT, algorithm, key, data, buffer); |
| 170 } | 170 } |
| 171 | 171 |
| 172 virtual Status Decrypt(const blink::WebCryptoAlgorithm& algorithm, | 172 virtual Status Decrypt(const blink::WebCryptoAlgorithm& algorithm, |
| 173 const blink::WebCryptoKey& key, | 173 const blink::WebCryptoKey& key, |
| 174 const CryptoData& data, | 174 const CryptoData& data, |
| 175 std::vector<uint8>* buffer) const OVERRIDE { | 175 std::vector<uint8_t>* buffer) const OVERRIDE { |
| 176 return AesGcmEncryptDecrypt(DECRYPT, algorithm, key, data, buffer); | 176 return AesGcmEncryptDecrypt(DECRYPT, algorithm, key, data, buffer); |
| 177 } | 177 } |
| 178 }; | 178 }; |
| 179 | 179 |
| 180 } // namespace | 180 } // namespace |
| 181 | 181 |
| 182 AlgorithmImplementation* CreatePlatformAesGcmImplementation() { | 182 AlgorithmImplementation* CreatePlatformAesGcmImplementation() { |
| 183 return new AesGcmImplementation; | 183 return new AesGcmImplementation; |
| 184 } | 184 } |
| 185 | 185 |
| 186 } // namespace webcrypto | 186 } // namespace webcrypto |
| 187 | 187 |
| 188 } // namespace content | 188 } // namespace content |
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