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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
// This interface is deprecated and being removed: https://crbug.com/425863216.
// New users should use crypto/keypair instead.
#ifndef CRYPTO_EC_PRIVATE_KEY_H_
#define CRYPTO_EC_PRIVATE_KEY_H_
#include <stddef.h>
#include <stdint.h>
#include <memory>
#include <string>
#include <vector>
#include "base/containers/span.h"
#include "build/build_config.h"
#include "crypto/crypto_export.h"
#include "third_party/boringssl/src/include/openssl/base.h"
namespace crypto {
// Encapsulates an elliptic curve (EC) private key. Can be used to generate new
// keys, export keys to other formats, or to extract a public key.
// TODO(https://crbug.com/425863216): Delete this.
class CRYPTO_EXPORT ECPrivateKey {
public:
ECPrivateKey(const ECPrivateKey&) = delete;
ECPrivateKey& operator=(const ECPrivateKey&) = delete;
~ECPrivateKey();
// Creates a new random instance. Can return nullptr if initialization fails.
// The created key will use the NIST P-256 curve.
static std::unique_ptr<ECPrivateKey> Create();
// Create a new instance by importing an existing private key. The format is
// an ASN.1-encoded PrivateKeyInfo block from PKCS #8. This can return
// nullptr if initialization fails.
static std::unique_ptr<ECPrivateKey> CreateFromPrivateKeyInfo(
base::span<const uint8_t> input);
// Creates a new instance by importing an existing key pair.
// The key pair is given as an ASN.1-encoded PKCS #8 EncryptedPrivateKeyInfo
// block with empty password and an X.509 SubjectPublicKeyInfo block.
// Returns nullptr if initialization fails.
//
// This function is deprecated. Use CreateFromPrivateKeyInfo for new code.
// See https://crbug.com/603319.
static std::unique_ptr<ECPrivateKey> CreateFromEncryptedPrivateKeyInfo(
base::span<const uint8_t> encrypted_private_key_info);
// Returns a copy of the object.
std::unique_ptr<ECPrivateKey> Copy() const;
EVP_PKEY* key() const { return key_.get(); }
// Exports the private key to a PKCS #8 PrivateKeyInfo block.
bool ExportPrivateKey(std::vector<uint8_t>* output) const;
// Exports the public key to an X.509 SubjectPublicKeyInfo block.
bool ExportPublicKey(std::vector<uint8_t>* output) const;
// Exports the public key as an EC point in X9.62 uncompressed form. Note this
// includes the leading 0x04 byte.
bool ExportRawPublicKey(std::string* output) const;
private:
// Constructor is private. Use one of the Create*() methods above instead.
ECPrivateKey();
bssl::UniquePtr<EVP_PKEY> key_;
};
} // namespace crypto
#endif // CRYPTO_EC_PRIVATE_KEY_H_
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