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65 lines
2.0 KiB
65 lines
2.0 KiB
7 months ago
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// Copyright 2019 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 UTIL_CRYPTO_RSA_PRIVATE_KEY_H_
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#define UTIL_CRYPTO_RSA_PRIVATE_KEY_H_
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#include <openssl/base.h>
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#include <openssl/evp.h>
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#include <stddef.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 "platform/base/error.h"
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#include "platform/base/macros.h"
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namespace openscreen {
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// Encapsulates an RSA private key. Can be used to generate new keys, export
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// keys to other formats, or to extract a public key.
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class RSAPrivateKey {
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public:
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RSAPrivateKey(RSAPrivateKey&& other) noexcept = default;
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RSAPrivateKey& operator=(RSAPrivateKey&& other) = default;
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~RSAPrivateKey();
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// Create a new random instance. Can return nullptr if initialization fails.
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static ErrorOr<RSAPrivateKey> Create(uint16_t num_bits);
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// Create a new instance by importing an existing private key. The format is
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// an ASN.1-encoded PrivateKeyInfo block from PKCS #8.
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static ErrorOr<RSAPrivateKey> CreateFromPrivateKeyInfo(
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const std::vector<uint8_t>& input);
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// Create a new instance from an existing EVP_PKEY, taking a
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// reference to it. |key| must be an RSA key.
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static ErrorOr<RSAPrivateKey> CreateFromKey(EVP_PKEY* key);
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// Creates a copy of the object.
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ErrorOr<RSAPrivateKey> Copy() const;
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EVP_PKEY* key() { return key_.get(); }
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const EVP_PKEY* key() const { return key_.get(); }
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// Exports the private key to a PKCS #8 PrivateKeyInfo block.
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ErrorOr<std::vector<uint8_t>> ExportPrivateKey() const;
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// Exports the public key to an X509 SubjectPublicKeyInfo block.
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ErrorOr<std::vector<uint8_t>> ExportPublicKey() const;
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private:
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// Constructor is private. Use one of the Create*() methods above instead.
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RSAPrivateKey();
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bssl::UniquePtr<EVP_PKEY> key_;
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OSP_DISALLOW_COPY_AND_ASSIGN(RSAPrivateKey);
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};
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} // namespace openscreen
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#endif // UTIL_CRYPTO_RSA_PRIVATE_KEY_H_
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