mirror of https://github.com/bitcoin/bitcoin
68 lines
1.7 KiB
C++
68 lines
1.7 KiB
C++
// Copyright (c) 2015-2019 The Bitcoin Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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//
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// C++ wrapper around ctaes, a constant-time AES implementation
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#ifndef BITCOIN_CRYPTO_AES_H
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#define BITCOIN_CRYPTO_AES_H
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extern "C" {
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#include <crypto/ctaes/ctaes.h>
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}
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static const int AES_BLOCKSIZE = 16;
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static const int AES256_KEYSIZE = 32;
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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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explicit AES256Encrypt(const unsigned char key[32]);
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~AES256Encrypt();
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void Encrypt(unsigned char ciphertext[16], const unsigned 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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explicit AES256Decrypt(const unsigned char key[32]);
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~AES256Decrypt();
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void Decrypt(unsigned char plaintext[16], const unsigned 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 unsigned char key[AES256_KEYSIZE], const unsigned char ivIn[AES_BLOCKSIZE], bool padIn);
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~AES256CBCEncrypt();
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int Encrypt(const unsigned char* data, int size, unsigned 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 unsigned char key[AES256_KEYSIZE], const unsigned char ivIn[AES_BLOCKSIZE], bool padIn);
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~AES256CBCDecrypt();
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int Decrypt(const unsigned char* data, int size, unsigned 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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unsigned char iv[AES_BLOCKSIZE];
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};
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#endif // BITCOIN_CRYPTO_AES_H
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