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-rw-r--r--src/hash.h189
1 files changed, 106 insertions, 83 deletions
diff --git a/src/hash.h b/src/hash.h
index 7dbf1b6448..f2a0ebfe1f 100644
--- a/src/hash.h
+++ b/src/hash.h
@@ -6,55 +6,138 @@
#ifndef BITCOIN_HASH_H
#define BITCOIN_HASH_H
+#include "crypto/sha2.h"
+#include "crypto/ripemd160.h"
#include "serialize.h"
#include "uint256.h"
#include "version.h"
#include <vector>
-#include <openssl/ripemd.h>
-#include <openssl/sha.h>
+/** A hasher class for Bitcoin's 256-bit hash (double SHA-256). */
+class CHash256 {
+private:
+ CSHA256 sha;
+public:
+ static const size_t OUTPUT_SIZE = CSHA256::OUTPUT_SIZE;
+
+ void Finalize(unsigned char hash[OUTPUT_SIZE]) {
+ unsigned char buf[sha.OUTPUT_SIZE];
+ sha.Finalize(buf);
+ sha.Reset().Write(buf, sha.OUTPUT_SIZE).Finalize(hash);
+ }
+
+ CHash256& Write(const unsigned char *data, size_t len) {
+ sha.Write(data, len);
+ return *this;
+ }
+
+ CHash256& Reset() {
+ sha.Reset();
+ return *this;
+ }
+};
+/** A hasher class for Bitcoin's 160-bit hash (SHA-256 + RIPEMD-160). */
+class CHash160 {
+private:
+ CSHA256 sha;
+public:
+ static const size_t OUTPUT_SIZE = CRIPEMD160::OUTPUT_SIZE;
+
+ void Finalize(unsigned char hash[OUTPUT_SIZE]) {
+ unsigned char buf[sha.OUTPUT_SIZE];
+ sha.Finalize(buf);
+ CRIPEMD160().Write(buf, sha.OUTPUT_SIZE).Finalize(hash);
+ }
+
+ CHash160& Write(const unsigned char *data, size_t len) {
+ sha.Write(data, len);
+ return *this;
+ }
+
+ CHash160& Reset() {
+ sha.Reset();
+ return *this;
+ }
+};
+
+/** Compute the 256-bit hash of an object. */
template<typename T1>
inline uint256 Hash(const T1 pbegin, const T1 pend)
{
- static unsigned char pblank[1];
- uint256 hash1;
- SHA256((pbegin == pend ? pblank : (unsigned char*)&pbegin[0]), (pend - pbegin) * sizeof(pbegin[0]), (unsigned char*)&hash1);
- uint256 hash2;
- SHA256((unsigned char*)&hash1, sizeof(hash1), (unsigned char*)&hash2);
- return hash2;
+ static const unsigned char pblank[1] = {};
+ uint256 result;
+ CHash256().Write(pbegin == pend ? pblank : (const unsigned char*)&pbegin[0], (pend - pbegin) * sizeof(pbegin[0]))
+ .Finalize((unsigned char*)&result);
+ return result;
+}
+
+/** Compute the 256-bit hash of the concatenation of two objects. */
+template<typename T1, typename T2>
+inline uint256 Hash(const T1 p1begin, const T1 p1end,
+ const T2 p2begin, const T2 p2end) {
+ static const unsigned char pblank[1] = {};
+ uint256 result;
+ CHash256().Write(p1begin == p1end ? pblank : (const unsigned char*)&p1begin[0], (p1end - p1begin) * sizeof(p1begin[0]))
+ .Write(p2begin == p2end ? pblank : (const unsigned char*)&p2begin[0], (p2end - p2begin) * sizeof(p2begin[0]))
+ .Finalize((unsigned char*)&result);
+ return result;
+}
+
+/** Compute the 256-bit hash of the concatenation of three objects. */
+template<typename T1, typename T2, typename T3>
+inline uint256 Hash(const T1 p1begin, const T1 p1end,
+ const T2 p2begin, const T2 p2end,
+ const T3 p3begin, const T3 p3end) {
+ static const unsigned char pblank[1] = {};
+ uint256 result;
+ CHash256().Write(p1begin == p1end ? pblank : (const unsigned char*)&p1begin[0], (p1end - p1begin) * sizeof(p1begin[0]))
+ .Write(p2begin == p2end ? pblank : (const unsigned char*)&p2begin[0], (p2end - p2begin) * sizeof(p2begin[0]))
+ .Write(p3begin == p3end ? pblank : (const unsigned char*)&p3begin[0], (p3end - p3begin) * sizeof(p3begin[0]))
+ .Finalize((unsigned char*)&result);
+ return result;
+}
+
+/** Compute the 160-bit hash an object. */
+template<typename T1>
+inline uint160 Hash160(const T1 pbegin, const T1 pend)
+{
+ static unsigned char pblank[1] = {};
+ uint160 result;
+ CHash160().Write(pbegin == pend ? pblank : (const unsigned char*)&pbegin[0], (pend - pbegin) * sizeof(pbegin[0]))
+ .Finalize((unsigned char*)&result);
+ return result;
}
+/** Compute the 160-bit hash of a vector. */
+inline uint160 Hash160(const std::vector<unsigned char>& vch)
+{
+ return Hash160(vch.begin(), vch.end());
+}
+
+/** A writer stream (for serialization) that computes a 256-bit hash. */
class CHashWriter
{
private:
- SHA256_CTX ctx;
+ CHash256 ctx;
public:
int nType;
int nVersion;
- void Init() {
- SHA256_Init(&ctx);
- }
-
- CHashWriter(int nTypeIn, int nVersionIn) : nType(nTypeIn), nVersion(nVersionIn) {
- Init();
- }
+ CHashWriter(int nTypeIn, int nVersionIn) : nType(nTypeIn), nVersion(nVersionIn) {}
CHashWriter& write(const char *pch, size_t size) {
- SHA256_Update(&ctx, pch, size);
+ ctx.Write((const unsigned char*)pch, size);
return (*this);
}
// invalidates the object
uint256 GetHash() {
- uint256 hash1;
- SHA256_Final((unsigned char*)&hash1, &ctx);
- uint256 hash2;
- SHA256((unsigned char*)&hash1, sizeof(hash1), (unsigned char*)&hash2);
- return hash2;
+ uint256 result;
+ ctx.Finalize((unsigned char*)&result);
+ return result;
}
template<typename T>
@@ -65,41 +148,7 @@ public:
}
};
-
-template<typename T1, typename T2>
-inline uint256 Hash(const T1 p1begin, const T1 p1end,
- const T2 p2begin, const T2 p2end)
-{
- static unsigned char pblank[1];
- uint256 hash1;
- SHA256_CTX ctx;
- SHA256_Init(&ctx);
- SHA256_Update(&ctx, (p1begin == p1end ? pblank : (unsigned char*)&p1begin[0]), (p1end - p1begin) * sizeof(p1begin[0]));
- SHA256_Update(&ctx, (p2begin == p2end ? pblank : (unsigned char*)&p2begin[0]), (p2end - p2begin) * sizeof(p2begin[0]));
- SHA256_Final((unsigned char*)&hash1, &ctx);
- uint256 hash2;
- SHA256((unsigned char*)&hash1, sizeof(hash1), (unsigned char*)&hash2);
- return hash2;
-}
-
-template<typename T1, typename T2, typename T3>
-inline uint256 Hash(const T1 p1begin, const T1 p1end,
- const T2 p2begin, const T2 p2end,
- const T3 p3begin, const T3 p3end)
-{
- static unsigned char pblank[1];
- uint256 hash1;
- SHA256_CTX ctx;
- SHA256_Init(&ctx);
- SHA256_Update(&ctx, (p1begin == p1end ? pblank : (unsigned char*)&p1begin[0]), (p1end - p1begin) * sizeof(p1begin[0]));
- SHA256_Update(&ctx, (p2begin == p2end ? pblank : (unsigned char*)&p2begin[0]), (p2end - p2begin) * sizeof(p2begin[0]));
- SHA256_Update(&ctx, (p3begin == p3end ? pblank : (unsigned char*)&p3begin[0]), (p3end - p3begin) * sizeof(p3begin[0]));
- SHA256_Final((unsigned char*)&hash1, &ctx);
- uint256 hash2;
- SHA256((unsigned char*)&hash1, sizeof(hash1), (unsigned char*)&hash2);
- return hash2;
-}
-
+/** Compute the 256-bit hash of an object's serialization. */
template<typename T>
uint256 SerializeHash(const T& obj, int nType=SER_GETHASH, int nVersion=PROTOCOL_VERSION)
{
@@ -108,32 +157,6 @@ uint256 SerializeHash(const T& obj, int nType=SER_GETHASH, int nVersion=PROTOCOL
return ss.GetHash();
}
-template<typename T1>
-inline uint160 Hash160(const T1 pbegin, const T1 pend)
-{
- static unsigned char pblank[1];
- uint256 hash1;
- SHA256((pbegin == pend ? pblank : (unsigned char*)&pbegin[0]), (pend - pbegin) * sizeof(pbegin[0]), (unsigned char*)&hash1);
- uint160 hash2;
- RIPEMD160((unsigned char*)&hash1, sizeof(hash1), (unsigned char*)&hash2);
- return hash2;
-}
-
-inline uint160 Hash160(const std::vector<unsigned char>& vch)
-{
- return Hash160(vch.begin(), vch.end());
-}
-
unsigned int MurmurHash3(unsigned int nHashSeed, const std::vector<unsigned char>& vDataToHash);
-typedef struct
-{
- SHA512_CTX ctxInner;
- SHA512_CTX ctxOuter;
-} HMAC_SHA512_CTX;
-
-int HMAC_SHA512_Init(HMAC_SHA512_CTX *pctx, const void *pkey, size_t len);
-int HMAC_SHA512_Update(HMAC_SHA512_CTX *pctx, const void *pdata, size_t len);
-int HMAC_SHA512_Final(unsigned char *pmd, HMAC_SHA512_CTX *pctx);
-
#endif
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