104 lines
3.2 KiB
C++
104 lines
3.2 KiB
C++
// Copyright (c) 2009-2010 Satoshi Nakamoto
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// Copyright (c) 2009-2012 The Bitcoin developers
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// Distributed under the MIT/X11 software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#ifndef BITCOIN_HASH_H
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#define BITCOIN_HASH_H
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#include "uint256.h"
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#include <openssl/sha.h>
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#include <openssl/ripemd.h>
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#include <vector>
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template<typename T1>
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inline uint256 Hash(const T1 pbegin, const T1 pend)
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{
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static unsigned char pblank[1];
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uint256 hash1;
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SHA256((pbegin == pend ? pblank : (unsigned char*)&pbegin[0]), (pend - pbegin) * sizeof(pbegin[0]), (unsigned char*)&hash1);
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uint256 hash2;
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SHA256((unsigned char*)&hash1, sizeof(hash1), (unsigned char*)&hash2);
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return hash2;
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}
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class CHashWriter
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{
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private:
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SHA256_CTX ctx;
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public:
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int nType;
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int nVersion;
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void Init() {
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SHA256_Init(&ctx);
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}
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CHashWriter(int nTypeIn, int nVersionIn) : nType(nTypeIn), nVersion(nVersionIn) {
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Init();
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}
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CHashWriter& write(const char *pch, size_t size) {
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SHA256_Update(&ctx, pch, size);
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return (*this);
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}
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// invalidates the object
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uint256 GetHash() {
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uint256 hash1;
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SHA256_Final((unsigned char*)&hash1, &ctx);
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uint256 hash2;
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SHA256((unsigned char*)&hash1, sizeof(hash1), (unsigned char*)&hash2);
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return hash2;
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}
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};
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template<typename T1, typename T2>
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inline uint256 Hash(const T1 p1begin, const T1 p1end,
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const T2 p2begin, const T2 p2end)
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{
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static unsigned char pblank[1];
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uint256 hash1;
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SHA256_CTX ctx;
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SHA256_Init(&ctx);
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SHA256_Update(&ctx, (p1begin == p1end ? pblank : (unsigned char*)&p1begin[0]), (p1end - p1begin) * sizeof(p1begin[0]));
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SHA256_Update(&ctx, (p2begin == p2end ? pblank : (unsigned char*)&p2begin[0]), (p2end - p2begin) * sizeof(p2begin[0]));
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SHA256_Final((unsigned char*)&hash1, &ctx);
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uint256 hash2;
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SHA256((unsigned char*)&hash1, sizeof(hash1), (unsigned char*)&hash2);
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return hash2;
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}
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template<typename T1, typename T2, typename T3>
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inline uint256 Hash(const T1 p1begin, const T1 p1end,
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const T2 p2begin, const T2 p2end,
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const T3 p3begin, const T3 p3end)
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{
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static unsigned char pblank[1];
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uint256 hash1;
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SHA256_CTX ctx;
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SHA256_Init(&ctx);
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SHA256_Update(&ctx, (p1begin == p1end ? pblank : (unsigned char*)&p1begin[0]), (p1end - p1begin) * sizeof(p1begin[0]));
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SHA256_Update(&ctx, (p2begin == p2end ? pblank : (unsigned char*)&p2begin[0]), (p2end - p2begin) * sizeof(p2begin[0]));
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SHA256_Update(&ctx, (p3begin == p3end ? pblank : (unsigned char*)&p3begin[0]), (p3end - p3begin) * sizeof(p3begin[0]));
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SHA256_Final((unsigned char*)&hash1, &ctx);
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uint256 hash2;
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SHA256((unsigned char*)&hash1, sizeof(hash1), (unsigned char*)&hash2);
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return hash2;
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}
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inline uint160 Hash160(const std::vector<unsigned char>& vch)
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{
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uint256 hash1;
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SHA256(&vch[0], vch.size(), (unsigned char*)&hash1);
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uint160 hash2;
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RIPEMD160((unsigned char*)&hash1, sizeof(hash1), (unsigned char*)&hash2);
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return hash2;
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}
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unsigned int MurmurHash3(unsigned int nHashSeed, const std::vector<unsigned char>& vDataToHash);
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#endif
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