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Add a built-in SHA256/SHA512 implementation.

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This also moves the HMAC-SHA512 implementation to sha2.cpp.
This commit is contained in:
Pieter Wuille
2014-04-20 17:36:25 +02:00
parent 540ce6aa10
commit 977cdadea8
8 changed files with 536 additions and 76 deletions
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19
src/key.cpp
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@@ -4,6 +4,8 @@
#include "key.h"
#include "sha2.h"
#include <openssl/bn.h>
#include <openssl/ecdsa.h>
#include <openssl/obj_mac.h>
@@ -510,12 +512,10 @@ void static BIP32Hash(const unsigned char chainCode[32], unsigned int nChild, un
num[1] = (nChild >> 16) & 0xFF;
num[2] = (nChild >> 8) & 0xFF;
num[3] = (nChild >> 0) & 0xFF;
HMAC_SHA512_CTX ctx;
HMAC_SHA512_Init(&ctx, chainCode, 32);
HMAC_SHA512_Update(&ctx, &header, 1);
HMAC_SHA512_Update(&ctx, data, 32);
HMAC_SHA512_Update(&ctx, num, 4);
HMAC_SHA512_Final(output, &ctx);
CHMAC_SHA512(chainCode, 32).Write(&header, 1)
.Write(data, 32)
.Write(num, 4)
.Finalize(output);
}
bool CKey::Derive(CKey& keyChild, unsigned char ccChild[32], unsigned int nChild, const unsigned char cc[32]) const {
@@ -562,13 +562,10 @@ bool CExtKey::Derive(CExtKey &out, unsigned int nChild) const {
}
void CExtKey::SetMaster(const unsigned char *seed, unsigned int nSeedLen) {
static const char hashkey[] = {'B','i','t','c','o','i','n',' ','s','e','e','d'};
HMAC_SHA512_CTX ctx;
HMAC_SHA512_Init(&ctx, hashkey, sizeof(hashkey));
HMAC_SHA512_Update(&ctx, seed, nSeedLen);
static const unsigned char hashkey[] = {'B','i','t','c','o','i','n',' ','s','e','e','d'};
unsigned char out[64];
LockObject(out);
HMAC_SHA512_Final(out, &ctx);
CHMAC_SHA512(hashkey, sizeof(hashkey)).Write(seed, nSeedLen).Finalize(out);
key.Set(&out[0], &out[32], true);
memcpy(vchChainCode, &out[32], 32);
UnlockObject(out);