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- // 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/memory/raw_ptr.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(const SignatureCreator&) = delete;
- SignatureCreator& operator=(const SignatureCreator&) = delete;
- ~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();
- raw_ptr<EVP_MD_CTX> sign_context_;
- };
- } // namespace crypto
- #endif // CRYPTO_SIGNATURE_CREATOR_H_
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