1 // Copyright (c) 2009-2010 Satoshi Nakamoto
2 // Copyright (c) 2009-2013 The Bitcoin Core developers
3 // Distributed under the MIT software license, see the accompanying
4 // file COPYING or https://www.opensource.org/licenses/mit-license.php .
9 #include "crypto/ripemd160.h"
10 #include "crypto/sha256.h"
11 #include "prevector.h"
12 #include "serialize.h"
20 typedef uint256 ChainCode;
22 /** A hasher class for Bitcoin's 256-bit hash (double SHA-256). */
27 static const size_t OUTPUT_SIZE = CSHA256::OUTPUT_SIZE;
29 void Finalize(unsigned char hash[OUTPUT_SIZE]) {
30 unsigned char buf[sha.OUTPUT_SIZE];
32 sha.Reset().Write(buf, sha.OUTPUT_SIZE).Finalize(hash);
35 CHash256& Write(const unsigned char *data, size_t len) {
46 /** A hasher class for Bitcoin's 160-bit hash (SHA-256 + RIPEMD-160). */
51 static const size_t OUTPUT_SIZE = CRIPEMD160::OUTPUT_SIZE;
53 void Finalize(unsigned char hash[OUTPUT_SIZE]) {
54 unsigned char buf[sha.OUTPUT_SIZE];
56 CRIPEMD160().Write(buf, sha.OUTPUT_SIZE).Finalize(hash);
59 CHash160& Write(const unsigned char *data, size_t len) {
70 /** Compute the 256-bit hash of an object. */
72 inline uint256 Hash(const T1 pbegin, const T1 pend)
74 static const unsigned char pblank[1] = {};
76 CHash256().Write(pbegin == pend ? pblank : (const unsigned char*)&pbegin[0], (pend - pbegin) * sizeof(pbegin[0]))
77 .Finalize((unsigned char*)&result);
81 /** Compute the 256-bit hash of the concatenation of two objects. */
82 template<typename T1, typename T2>
83 inline uint256 Hash(const T1 p1begin, const T1 p1end,
84 const T2 p2begin, const T2 p2end) {
85 static const unsigned char pblank[1] = {};
87 CHash256().Write(p1begin == p1end ? pblank : (const unsigned char*)&p1begin[0], (p1end - p1begin) * sizeof(p1begin[0]))
88 .Write(p2begin == p2end ? pblank : (const unsigned char*)&p2begin[0], (p2end - p2begin) * sizeof(p2begin[0]))
89 .Finalize((unsigned char*)&result);
93 /** Compute the 256-bit hash of the concatenation of three objects. */
94 template<typename T1, typename T2, typename T3>
95 inline uint256 Hash(const T1 p1begin, const T1 p1end,
96 const T2 p2begin, const T2 p2end,
97 const T3 p3begin, const T3 p3end) {
98 static const unsigned char pblank[1] = {};
100 CHash256().Write(p1begin == p1end ? pblank : (const unsigned char*)&p1begin[0], (p1end - p1begin) * sizeof(p1begin[0]))
101 .Write(p2begin == p2end ? pblank : (const unsigned char*)&p2begin[0], (p2end - p2begin) * sizeof(p2begin[0]))
102 .Write(p3begin == p3end ? pblank : (const unsigned char*)&p3begin[0], (p3end - p3begin) * sizeof(p3begin[0]))
103 .Finalize((unsigned char*)&result);
107 /** Compute the 160-bit hash an object. */
108 template<typename T1>
109 inline uint160 Hash160(const T1 pbegin, const T1 pend)
111 static unsigned char pblank[1] = {};
113 CHash160().Write(pbegin == pend ? pblank : (const unsigned char*)&pbegin[0], (pend - pbegin) * sizeof(pbegin[0]))
114 .Finalize((unsigned char*)&result);
118 /** Compute the 160-bit hash of a vector. */
119 inline uint160 Hash160(const std::vector<unsigned char>& vch)
121 return Hash160(vch.begin(), vch.end());
124 /** Compute the 160-bit hash of a vector. */
125 template<unsigned int N>
126 inline uint160 Hash160(const prevector<N, unsigned char>& vch)
128 return Hash160(vch.begin(), vch.end());
131 /** A writer stream (for serialization) that computes a 256-bit hash. */
141 CHashWriter(int nTypeIn, int nVersionIn) : nType(nTypeIn), nVersion(nVersionIn) {}
143 int GetType() const { return nType; }
144 int GetVersion() const { return nVersion; }
146 void write(const char *pch, size_t size) {
147 ctx.Write((const unsigned char*)pch, size);
150 // invalidates the object
153 ctx.Finalize((unsigned char*)&result);
158 CHashWriter& operator<<(const T& obj) {
159 // Serialize to this stream
160 ::Serialize(*this, obj);
166 /** A writer stream (for serialization) that computes a 256-bit BLAKE2b hash. */
170 crypto_generichash_blake2b_state state;
176 CBLAKE2bWriter(int nTypeIn, int nVersionIn, const unsigned char* personal) : nType(nTypeIn), nVersion(nVersionIn) {
177 assert(crypto_generichash_blake2b_init_salt_personal(
185 int GetType() const { return nType; }
186 int GetVersion() const { return nVersion; }
188 CBLAKE2bWriter& write(const char *pch, size_t size) {
189 crypto_generichash_blake2b_update(&state, (const unsigned char*)pch, size);
193 // invalidates the object
196 crypto_generichash_blake2b_final(&state, (unsigned char*)&result, 32);
201 CBLAKE2bWriter& operator<<(const T& obj) {
202 // Serialize to this stream
203 ::Serialize(*this, obj);
209 /** Compute the 256-bit hash of an object's serialization. */
211 uint256 SerializeHash(const T& obj, int nType=SER_GETHASH, int nVersion=PROTOCOL_VERSION)
213 CHashWriter ss(nType, nVersion);
218 unsigned int MurmurHash3(unsigned int nHashSeed, const std::vector<unsigned char>& vDataToHash);
220 void BIP32Hash(const ChainCode &chainCode, unsigned int nChild, unsigned char header, const unsigned char data[32], unsigned char output[64]);
222 #endif // BITCOIN_HASH_H