bcrypt_functions.hpp

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//---------------------------------------------------------------------------//
// Copyright (c) 2018-2020 Mikhail Komarov <nemo@nil.foundation>
//
// MIT License
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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//---------------------------------------------------------------------------//
 
#ifndef CRYPTO3_PASSHASH_BCRYPT_FUNCTIONS_HPP
#define CRYPTO3_PASSHASH_BCRYPT_FUNCTIONS_HPP
 
#include <nil/crypto3/passhash/detail/bcrypt/bcrypt_policy.hpp>
 
#include <nil/crypto3/codec/base.hpp>
 
namespace nil {
    namespace crypto3 {
        namespace passhash {
            namespace detail {
                template<typename BlockCipher>
                struct bcrypt_functions : public bcrypt_policy<BlockCipher> {
                    typedef bcrypt_policy<BlockCipher> policy_type;
 
                    typedef typename policy_type::cipher_type cipher_type;
 
                    std::string bcrypt_base64_encode(const uint8_t input[], size_t length) {
                        std::string b64 = base64_encode(input, length);
 
                        while (!b64.empty() && b64[b64.size() - 1] == '=') {
                            b64 = b64.substr(0, b64.size() - 1);
                        }
 
                        for (size_t i = 0; i != b64.size(); ++i) {
                            b64[i] = policy_type::substitution()[static_cast<uint8_t>(b64[i])];
                        }
 
                        return b64;
                    }
 
                    std::vector<uint8_t> bcrypt_base64_decode(const std::string& input) {
                        for (size_t i = 0; i != input.size(); ++i) {
                            input[i] = policy_type::inverted_substitution()[static_cast<uint8_t>(input[i])];
                        }
 
                        return unlock(base64_decode(input));
                    }
                };
            }    // namespace detail
        }        // namespace passhash
    }            // namespace crypto3
}    // namespace nil
 
#endif    // CRYPTO3_BCRYPT_FUNCTIONS_HPP