| // Copyright (c) 2013 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef CONTENT_RENDERER_WEBCRYPTO_WEBCRYPTO_UTIL_H_ |
| #define CONTENT_RENDERER_WEBCRYPTO_WEBCRYPTO_UTIL_H_ |
| |
| #include <map> |
| #include <string> |
| #include <vector> |
| #include "base/basictypes.h" |
| #include "content/common/content_export.h" |
| #include "third_party/WebKit/public/platform/WebArrayBuffer.h" |
| #include "third_party/WebKit/public/platform/WebCryptoAlgorithm.h" |
| |
| namespace content { |
| |
| namespace webcrypto { |
| |
| // Returns a pointer to the start of |data|, or NULL if it is empty. This is a |
| // convenience function for getting the pointer, and should not be used beyond |
| // the expected lifetime of |data|. |
| CONTENT_EXPORT const uint8* Uint8VectorStart(const std::vector<uint8>& data); |
| |
| // Shrinks a WebArrayBuffer to a new size. |
| // TODO(eroman): This works by re-allocating a new buffer. It would be better if |
| // the WebArrayBuffer could just be truncated instead. |
| void ShrinkBuffer(blink::WebArrayBuffer* buffer, unsigned new_size); |
| |
| // Creates a WebArrayBuffer from a uint8 byte array |
| blink::WebArrayBuffer CreateArrayBuffer(const uint8* data, unsigned data_size); |
| |
| // This function decodes unpadded 'base64url' encoded data, as described in |
| // RFC4648 (http://www.ietf.org/rfc/rfc4648.txt) Section 5. |
| // In Web Crypto, this type of encoding is only used inside JWK. |
| bool Base64DecodeUrlSafe(const std::string& input, std::string* output); |
| |
| // Returns the "hash" param for an algorithm if it exists, otherwise returns |
| // a null algorithm. |
| blink::WebCryptoAlgorithm GetInnerHashAlgorithm( |
| const blink::WebCryptoAlgorithm& algorithm); |
| |
| // Creates a WebCryptoAlgorithm without any parameters. |
| CONTENT_EXPORT blink::WebCryptoAlgorithm CreateAlgorithm( |
| blink::WebCryptoAlgorithmId id); |
| |
| // Creates an HMAC algorithm whose inner hash algorithm is determined by the |
| // specified hash output length. It is an error to call this method with an |
| // unsupported hash output length. |
| blink::WebCryptoAlgorithm CreateHmacAlgorithmByHashOutputLen( |
| unsigned short hash_output_length_bits); |
| |
| // Creates an HMAC algorithm whose inner hash algorithm is determined by the |
| // specified algorithm ID. It is an error to call this method with a hash |
| // algorithm that is not SHA*. |
| CONTENT_EXPORT blink::WebCryptoAlgorithm CreateHmacAlgorithmByHashId( |
| blink::WebCryptoAlgorithmId hash_id); |
| |
| // Creates an HMAC algorithm whose parameters struct is compatible with key |
| // generation. It is an error to call this with a hash_id that is not a SHA*. |
| // The key_length_bytes parameter is optional, with zero meaning unspecified. |
| CONTENT_EXPORT blink::WebCryptoAlgorithm CreateHmacKeyGenAlgorithm( |
| blink::WebCryptoAlgorithmId hash_id, |
| unsigned key_length_bytes); |
| |
| // Creates an RSASSA-PKCS1-v1_5 algorithm. It is an error to call this with a |
| // hash_id that is not a SHA*. |
| blink::WebCryptoAlgorithm CreateRsaSsaAlgorithm( |
| blink::WebCryptoAlgorithmId hash_id); |
| |
| // Creates an RSA-OAEP algorithm. It is an error to call this with a hash_id |
| // that is not a SHA*. |
| blink::WebCryptoAlgorithm CreateRsaOaepAlgorithm( |
| blink::WebCryptoAlgorithmId hash_id); |
| |
| // Creates an RSA algorithm with ID algorithm_id, whose parameters struct is |
| // compatible with key generation. |
| CONTENT_EXPORT blink::WebCryptoAlgorithm CreateRsaKeyGenAlgorithm( |
| blink::WebCryptoAlgorithmId algorithm_id, |
| unsigned modulus_length, |
| const std::vector<uint8>& public_exponent); |
| |
| // Creates an AES-CBC algorithm. |
| CONTENT_EXPORT blink::WebCryptoAlgorithm CreateAesCbcAlgorithm( |
| const std::vector<uint8>& iv); |
| |
| // Creates and AES-GCM algorithm. |
| blink::WebCryptoAlgorithm CreateAesGcmAlgorithm( |
| const std::vector<uint8>& iv, |
| const std::vector<uint8>& additional_data, |
| uint8 tag_length_bytes); |
| |
| // Creates an AES-CBC algorithm whose parameters struct is compatible with key |
| // generation. |
| CONTENT_EXPORT blink::WebCryptoAlgorithm CreateAesCbcKeyGenAlgorithm( |
| unsigned short key_length_bits); |
| |
| // Creates an AES-GCM algorithm whose parameters struct is compatible with key |
| // generation. |
| blink::WebCryptoAlgorithm CreateAesGcmKeyGenAlgorithm( |
| unsigned short key_length_bits); |
| |
| } // namespace webcrypto |
| |
| } // namespace content |
| |
| #endif // CONTENT_RENDERER_WEBCRYPTO_WEBCRYPTO_UTIL_H_ |