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Add HMAC-SHA512 to hash

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This commit is contained in:
Pieter Wuille
2013-06-22 22:23:22 +02:00
parent ee4949794b
commit 12dff9801f
3 changed files with 176 additions and 0 deletions
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41
src/hash.cpp
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@@ -56,3 +56,44 @@ unsigned int MurmurHash3(unsigned int nHashSeed, const std::vector<unsigned char
return h1;
}
int HMAC_SHA512_Init(HMAC_SHA512_CTX *pctx, const void *pkey, size_t len)
{
unsigned char key[128];
if (len <= 128)
{
memcpy(key, pkey, len);
memset(key + len, 0, 128-len);
}
else
{
SHA512_CTX ctxKey;
SHA512_Init(&ctxKey);
SHA512_Update(&ctxKey, pkey, len);
SHA512_Final(key, &ctxKey);
memset(key + 64, 0, 64);
}
for (int n=0; n<128; n++)
key[n] ^= 0x5c;
SHA512_Init(&pctx->ctxOuter);
SHA512_Update(&pctx->ctxOuter, key, 128);
for (int n=0; n<128; n++)
key[n] ^= 0x5c ^ 0x36;
SHA512_Init(&pctx->ctxInner);
return SHA512_Update(&pctx->ctxInner, key, 128);
}
int HMAC_SHA512_Update(HMAC_SHA512_CTX *pctx, const void *pdata, size_t len)
{
return SHA512_Update(&pctx->ctxInner, pdata, len);
}
int HMAC_SHA512_Final(unsigned char *pmd, HMAC_SHA512_CTX *pctx)
{
unsigned char buf[64];
SHA512_Final(buf, &pctx->ctxInner);
SHA512_Update(&pctx->ctxOuter, buf, 64);
return SHA512_Final(pmd, &pctx->ctxOuter);
}