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68 lines
1.9 KiB
68 lines
1.9 KiB
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef CRYPTO_SIGNATURE_CREATOR_H_
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#define CRYPTO_SIGNATURE_CREATOR_H_
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#include <stdint.h>
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#include <memory>
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#include <vector>
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#include "base/macros.h"
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#include "build/build_config.h"
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#include "crypto/crypto_export.h"
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// Forward declaration for openssl/*.h
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typedef struct env_md_ctx_st EVP_MD_CTX;
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namespace crypto {
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class RSAPrivateKey;
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// Signs data using a bare private key (as opposed to a full certificate).
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// Currently can only sign data using SHA-1 or SHA-256 with RSA PKCS#1v1.5.
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class CRYPTO_EXPORT SignatureCreator {
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public:
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// The set of supported hash functions. Extend as required.
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enum HashAlgorithm {
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SHA1,
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SHA256,
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};
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~SignatureCreator();
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// Create an instance. The caller must ensure that the provided PrivateKey
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// instance outlives the created SignatureCreator. Uses the HashAlgorithm
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// specified.
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static std::unique_ptr<SignatureCreator> Create(RSAPrivateKey* key,
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HashAlgorithm hash_alg);
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// Signs the precomputed |hash_alg| digest |data| using private |key| as
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// specified in PKCS #1 v1.5.
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static bool Sign(RSAPrivateKey* key,
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HashAlgorithm hash_alg,
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const uint8_t* data,
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int data_len,
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std::vector<uint8_t>* signature);
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// Update the signature with more data.
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bool Update(const uint8_t* data_part, int data_part_len);
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// Finalize the signature.
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bool Final(std::vector<uint8_t>* signature);
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private:
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// Private constructor. Use the Create() method instead.
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SignatureCreator();
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EVP_MD_CTX* sign_context_;
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DISALLOW_COPY_AND_ASSIGN(SignatureCreator);
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};
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} // namespace crypto
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#endif // CRYPTO_SIGNATURE_CREATOR_H_
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