1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef CRYPTO_RSA_PRIVATE_KEY_H_ 6 #define CRYPTO_RSA_PRIVATE_KEY_H_ 7 8 #include <stddef.h> 9 #include <stdint.h> 10 #include <openssl/base.h> 11 12 #include <memory> 13 #include <vector> 14 15 #include "base/macros.h" 16 #include "build/build_config.h" 17 #include "crypto/crypto_export.h" 18 19 namespace crypto { 20 21 // Encapsulates an RSA private key. Can be used to generate new keys, export 22 // keys to other formats, or to extract a public key. 23 // TODO(hclam): This class should be ref-counted so it can be reused easily. 24 class CRYPTO_EXPORT RSAPrivateKey { 25 public: 26 ~RSAPrivateKey(); 27 28 // Create a new random instance. Can return NULL if initialization fails. 29 static std::unique_ptr<RSAPrivateKey> Create(uint16_t num_bits); 30 31 // Create a new instance by importing an existing private key. The format is 32 // an ASN.1-encoded PrivateKeyInfo block from PKCS #8. This can return NULL if 33 // initialization fails. 34 static std::unique_ptr<RSAPrivateKey> CreateFromPrivateKeyInfo( 35 const std::vector<uint8_t>& input); 36 37 // Create a new instance from an existing EVP_PKEY, taking a 38 // reference to it. |key| must be an RSA key. Returns NULL on 39 // failure. 40 static std::unique_ptr<RSAPrivateKey> CreateFromKey(EVP_PKEY* key); 41 42 EVP_PKEY* key() { return key_.get(); } 43 44 // Creates a copy of the object. 45 std::unique_ptr<RSAPrivateKey> Copy() const; 46 47 // Exports the private key to a PKCS #8 PrivateKeyInfo block. 48 bool ExportPrivateKey(std::vector<uint8_t>* output) const; 49 50 // Exports the public key to an X509 SubjectPublicKeyInfo block. 51 bool ExportPublicKey(std::vector<uint8_t>* output) const; 52 53 private: 54 // Constructor is private. Use one of the Create*() methods above instead. 55 RSAPrivateKey(); 56 57 bssl::UniquePtr<EVP_PKEY> key_; 58 59 DISALLOW_COPY_AND_ASSIGN(RSAPrivateKey); 60 }; 61 62 } // namespace crypto 63 64 #endif // CRYPTO_RSA_PRIVATE_KEY_H_ 65
