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129 lines
3.3 KiB
129 lines
3.3 KiB
/*
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This file is part of cpp-ethereum.
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cpp-ethereum 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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cpp-ethereum 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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You should have received a copy of the GNU General Public License
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along with cpp-ethereum. If not, see <http://www.gnu.org/licenses/>.
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*/
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/** @file SHA3.cpp
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* @author Gav Wood <i@gavwood.com>
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* @date 2014
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*/
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#include "SHA3.h"
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#include <libdevcore/RLP.h>
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#include "CryptoPP.h"
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using namespace std;
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using namespace dev;
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namespace dev
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{
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h256 EmptySHA3 = sha3(bytesConstRef());
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h256 EmptyListSHA3 = sha3(rlpList());
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std::string sha3(std::string const& _input, bool _hex)
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{
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if (!_hex)
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{
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string ret(32, '\0');
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sha3(bytesConstRef((byte const*)_input.data(), _input.size()), bytesRef((byte*)ret.data(), 32));
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return ret;
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}
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uint8_t buf[32];
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sha3(bytesConstRef((byte const*)_input.data(), _input.size()), bytesRef((byte*)&(buf[0]), 32));
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std::string ret(64, '\0');
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for (unsigned int i = 0; i < 32; i++)
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sprintf((char*)(ret.data())+i*2, "%02x", buf[i]);
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return ret;
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}
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void sha3(bytesConstRef _input, bytesRef _output)
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{
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CryptoPP::SHA3_256 ctx;
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ctx.Update((byte*)_input.data(), _input.size());
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assert(_output.size() >= 32);
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ctx.Final(_output.data());
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}
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void ripemd160(bytesConstRef _input, bytesRef _output)
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{
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CryptoPP::RIPEMD160 ctx;
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ctx.Update((byte*)_input.data(), _input.size());
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assert(_output.size() >= 32);
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ctx.Final(_output.data());
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}
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void sha256(bytesConstRef _input, bytesRef _output)
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{
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CryptoPP::SHA256 ctx;
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ctx.Update((byte*)_input.data(), _input.size());
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assert(_output.size() >= 32);
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ctx.Final(_output.data());
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}
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bytes sha3Bytes(bytesConstRef _input)
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{
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bytes ret(32);
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sha3(_input, &ret);
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return ret;
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}
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h256 sha3(bytesConstRef _input)
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{
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h256 ret;
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sha3(_input, bytesRef(&ret[0], 32));
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return ret;
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}
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void sha3mac(bytesConstRef _secret, bytesConstRef _plain, bytesRef _output)
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{
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CryptoPP::SHA3_256 ctx;
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assert(_secret.size() > 0);
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ctx.Update((byte*)_secret.data(), _secret.size());
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ctx.Update((byte*)_plain.data(), _plain.size());
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assert(_output.size() >= 32);
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ctx.Final(_output.data());
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}
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bytes aesDecrypt(bytesConstRef _ivCipher, std::string const& _password, unsigned _rounds, bytesConstRef _salt)
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{
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bytes pw = asBytes(_password);
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if (!_salt.size())
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_salt = &pw;
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bytes target(64);
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CryptoPP::PKCS5_PBKDF2_HMAC<CryptoPP::SHA256>().DeriveKey(target.data(), target.size(), 0, pw.data(), pw.size(), _salt.data(), _salt.size(), _rounds);
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try
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{
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CryptoPP::AES::Decryption aesDecryption(target.data(), 16);
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auto cipher = _ivCipher.cropped(16);
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auto iv = _ivCipher.cropped(0, 16);
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CryptoPP::CBC_Mode_ExternalCipher::Decryption cbcDecryption(aesDecryption, iv.data());
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std::string decrypted;
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CryptoPP::StreamTransformationFilter stfDecryptor(cbcDecryption, new CryptoPP::StringSink(decrypted));
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stfDecryptor.Put(cipher.data(), cipher.size());
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stfDecryptor.MessageEnd();
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return asBytes(decrypted);
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}
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catch (exception const& e)
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{
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cerr << e.what() << endl;
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return bytes();
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}
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}
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}
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