| // Copyright (c) 2012 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 CRYPTO_SIGNATURE_CREATOR_H_ |
| #define CRYPTO_SIGNATURE_CREATOR_H_ |
| |
| #include <stdint.h> |
| |
| #include <memory> |
| #include <vector> |
| |
| #include "base/macros.h" |
| #include "build/build_config.h" |
| #include "crypto/crypto_export.h" |
| #include "third_party/boringssl/src/include/openssl/base.h" |
| |
| namespace crypto { |
| |
| class RSAPrivateKey; |
| |
| // Signs data using a bare private key (as opposed to a full certificate). |
| // Currently can only sign data using SHA-1 or SHA-256 with RSA PKCS#1v1.5. |
| class CRYPTO_EXPORT SignatureCreator { |
| public: |
| // The set of supported hash functions. Extend as required. |
| enum HashAlgorithm { |
| SHA1, |
| SHA256, |
| }; |
| |
| ~SignatureCreator(); |
| |
| // Create an instance. The caller must ensure that the provided PrivateKey |
| // instance outlives the created SignatureCreator. Uses the HashAlgorithm |
| // specified. |
| static std::unique_ptr<SignatureCreator> Create(RSAPrivateKey* key, |
| HashAlgorithm hash_alg); |
| |
| // Signs the precomputed |hash_alg| digest |data| using private |key| as |
| // specified in PKCS #1 v1.5. |
| static bool Sign(RSAPrivateKey* key, |
| HashAlgorithm hash_alg, |
| const uint8_t* data, |
| int data_len, |
| std::vector<uint8_t>* signature); |
| |
| // Update the signature with more data. |
| bool Update(const uint8_t* data_part, int data_part_len); |
| |
| // Finalize the signature. |
| bool Final(std::vector<uint8_t>* signature); |
| |
| private: |
| // Private constructor. Use the Create() method instead. |
| SignatureCreator(); |
| |
| EVP_MD_CTX* sign_context_; |
| |
| DISALLOW_COPY_AND_ASSIGN(SignatureCreator); |
| }; |
| |
| } // namespace crypto |
| |
| #endif // CRYPTO_SIGNATURE_CREATOR_H_ |