142 lines
3.6 KiB
C++
142 lines
3.6 KiB
C++
/*
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* This file is part of the Flowee project
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* Copyright (C) 2015 The Bitcoin Core developers
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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//
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// C++ wrapper around ctaes, a constant-time AES implementation
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#ifndef FLOWEE_CRYPTO_AES_H
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#define FLOWEE_CRYPTO_AES_H
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extern "C" {
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#include "ctaes/ctaes.h"
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}
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#include <vector>
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static const int AES_BLOCKSIZE = 16;
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static const int AES128_KEYSIZE = 16;
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static const int AES256_KEYSIZE = 32;
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/** An encryption class for AES-128. */
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class AES128Encrypt
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{
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private:
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AES128_ctx ctx;
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public:
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AES128Encrypt(const char key[16]);
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~AES128Encrypt();
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void encrypt(char ciphertext[16], const char plaintext[16]) const;
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};
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/** A decryption class for AES-128. */
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class AES128Decrypt
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{
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private:
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AES128_ctx ctx;
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public:
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AES128Decrypt(const char key[16]);
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~AES128Decrypt();
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void decrypt(char plaintext[16], const char ciphertext[16]) const;
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};
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/** An encryption class for AES-256. */
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class AES256Encrypt
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{
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private:
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AES256_ctx ctx;
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public:
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AES256Encrypt(const char key[32]);
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~AES256Encrypt();
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void encrypt(char ciphertext[16], const char plaintext[16]) const;
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};
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/** A decryption class for AES-256. */
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class AES256Decrypt
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{
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private:
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AES256_ctx ctx;
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public:
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AES256Decrypt(const char key[32]);
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~AES256Decrypt();
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void decrypt(char plaintext[16], const char ciphertext[16]) const;
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};
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class AES256CBCEncrypt
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{
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public:
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AES256CBCEncrypt(const char key[AES256_KEYSIZE], const char ivIn[AES_BLOCKSIZE], bool padIn);
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~AES256CBCEncrypt();
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/// encrypt the \a data using the preferences passed in the constructor.
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int encrypt(const char *data, int size, char *out) const;
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/// convenience method
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int encrypt(const std::vector<unsigned char> &data, char *out) const;
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/// convenience method
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int encrypt(const std::vector<char> &data, char *out) const;
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private:
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const AES256Encrypt enc;
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const bool pad;
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unsigned char iv[AES_BLOCKSIZE];
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};
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class AES256CBCDecrypt
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{
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public:
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AES256CBCDecrypt(const char key[AES256_KEYSIZE], const char ivIn[AES_BLOCKSIZE], bool padIn);
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~AES256CBCDecrypt();
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int decrypt(const char *data, int size, char *out) const;
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int decrypt(const std::vector<char> &data, char *out) const;
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int decrypt(const std::vector<unsigned char> &data, char *out) const;
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private:
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const AES256Decrypt dec;
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const bool pad;
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char iv[AES_BLOCKSIZE];
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};
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class AES128CBCEncrypt
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{
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public:
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AES128CBCEncrypt(const char key[AES128_KEYSIZE], const char ivIn[AES_BLOCKSIZE], bool padIn);
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~AES128CBCEncrypt();
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int encrypt(const char *data, int size, char *out) const;
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private:
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const AES128Encrypt enc;
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const bool pad;
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unsigned char iv[AES_BLOCKSIZE];
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};
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class AES128CBCDecrypt
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{
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public:
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AES128CBCDecrypt(const char key[AES128_KEYSIZE], const char ivIn[AES_BLOCKSIZE], bool padIn);
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~AES128CBCDecrypt();
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int decrypt(const char *data, int size, char *out) const;
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private:
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const AES128Decrypt dec;
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const bool pad;
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char iv[AES_BLOCKSIZE];
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};
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#endif
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