cipher_ossl.hpp - mozsearch

/*

 * Copyright (c) 2021, [Ribose Inc](https://www.ribose.com).

 * All rights reserved.

 * Redistribution and use in source and binary forms, with or without modification,

 * are permitted provided that the following conditions are met:

 * 1.  Redistributions of source code must retain the above copyright notice,

 *     this list of conditions and the following disclaimer.

 * 2.  Redistributions in binary form must reproduce the above copyright notice,

 *     this list of conditions and the following disclaimer in the documentation

 *     and/or other materials provided with the distribution.

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND

 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE

 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE

 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

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 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,

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*/

#ifndef RNP_CIPHER_OSSL_HPP

#define RNP_CIPHER_OSSL_HPP

#include "cipher.hpp"

#include <openssl/evp.h>

#include <repgp/repgp_def.h>

class Cipher_OpenSSL : public Cipher {

  public:

    static std::unique_ptr<Cipher_OpenSSL> encryption(pgp_symm_alg_t    cipher,

                                                      pgp_cipher_mode_t mode,

                                                      size_t            tag_size,

                                                      bool              disable_padding);

    static std::unique_ptr<Cipher_OpenSSL> decryption(pgp_symm_alg_t    cipher,

                                                      pgp_cipher_mode_t mode,

                                                      size_t            tag_size,

                                                      bool              disable_padding);

    bool set_key(const uint8_t *key, size_t key_length) override;

    bool set_iv(const uint8_t *iv, size_t iv_length) override;

    bool set_ad(const uint8_t *ad, size_t ad_length) override;

    size_t update_granularity() const override;

    // input_length should not exceed INT_MAX

    bool update(uint8_t *      output,

                size_t         output_length,

                size_t *       output_written,

                const uint8_t *input,

                size_t         input_length,

                size_t *       input_consumed) override;

    bool finish(uint8_t *      output,

                size_t         output_length,

                size_t *       output_written,

                const uint8_t *input,

                size_t         input_length,

                size_t *       input_consumed) override;

    virtual ~Cipher_OpenSSL();

  private:

    Cipher_OpenSSL(pgp_symm_alg_t alg, EVP_CIPHER_CTX *ctx, size_t tag_size, bool encrypt);

    EVP_CIPHER_CTX *m_ctx;

    size_t          m_block_size;

    size_t          m_tag_size;

    bool            m_encrypt;

    static EVP_CIPHER_CTX *create(pgp_symm_alg_t     alg,

                                  const std::string &name,

                                  bool               encrypt,

                                  size_t             tag_size,

                                  bool               disable_padding);

};

#endif