rsa_key.h

// Copyright 2014 Google LLC. All rights reserved.
//
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file or at
// https://developers.google.com/open-source/licenses/bsd
//
// Declaration of classes representing RSA private and public keys used
// for message signing, signature verification, encryption and decryption.
 
#ifndef PACKAGER_MEDIA_BASE_RSA_KEY_H_
#define PACKAGER_MEDIA_BASE_RSA_KEY_H_
 
#include <string>
 
#include <mbedtls/ctr_drbg.h>
#include <mbedtls/entropy.h>
#include <mbedtls/pk.h>
 
#include <packager/macros/classes.h>
 
namespace shaka {
namespace media {
 
class RsaPrivateKey {
 public:
  ~RsaPrivateKey();
 
  static RsaPrivateKey* Create(const std::string& serialized_key);
 
  bool Decrypt(const std::string& encrypted_message,
               std::string* decrypted_message);
 
  bool GenerateSignature(const std::string& message, std::string* signature);
 
 private:
  RsaPrivateKey();
 
  bool Deserialize(const std::string& serialized_key);
 
  mbedtls_pk_context pk_context_;
  mbedtls_entropy_context entropy_context_;
  mbedtls_ctr_drbg_context prng_context_;
 
  DISALLOW_COPY_AND_ASSIGN(RsaPrivateKey);
};
 
class RsaPublicKey {
 public:
  ~RsaPublicKey();
 
  static RsaPublicKey* Create(const std::string& serialized_key);
 
  bool Encrypt(const std::string& clear_message,
               std::string* encrypted_message);
 
  bool VerifySignature(const std::string& message,
                       const std::string& signature);
 
 private:
  RsaPublicKey();
 
  bool Deserialize(const std::string& serialized_key);
 
  mbedtls_pk_context pk_context_;
  mbedtls_entropy_context entropy_context_;
  mbedtls_ctr_drbg_context prng_context_;
 
  DISALLOW_COPY_AND_ASSIGN(RsaPublicKey);
};
 
}  // namespace media
}  // namespace shaka
 
#endif  // PACKAGER_MEDIA_BASE_RSA_KEY_H_