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77 lines
1.8 KiB
C
77 lines
1.8 KiB
C
/* $OpenBSD: hash.c,v 1.3 2013/12/09 11:03:45 markus Exp $ */
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/* Copied from nacl-20110221/crypto_hash/sha512/ref/hash.c */
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/*
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20080913
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D. J. Bernstein
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Public domain.
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*/
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#include "includes.h"
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#include "crypto_api.h"
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#define blocks crypto_hashblocks_sha512
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static const unsigned char iv[64] = {
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0x6a,0x09,0xe6,0x67,0xf3,0xbc,0xc9,0x08,
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0xbb,0x67,0xae,0x85,0x84,0xca,0xa7,0x3b,
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0x3c,0x6e,0xf3,0x72,0xfe,0x94,0xf8,0x2b,
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0xa5,0x4f,0xf5,0x3a,0x5f,0x1d,0x36,0xf1,
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0x51,0x0e,0x52,0x7f,0xad,0xe6,0x82,0xd1,
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0x9b,0x05,0x68,0x8c,0x2b,0x3e,0x6c,0x1f,
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0x1f,0x83,0xd9,0xab,0xfb,0x41,0xbd,0x6b,
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0x5b,0xe0,0xcd,0x19,0x13,0x7e,0x21,0x79
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} ;
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typedef unsigned long long uint64;
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int crypto_hash_sha512(unsigned char *out,const unsigned char *in,unsigned long long inlen)
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{
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unsigned char h[64];
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unsigned char padded[256];
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unsigned int i;
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unsigned long long bytes = inlen;
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for (i = 0;i < 64;++i) h[i] = iv[i];
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blocks(h,in,inlen);
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in += inlen;
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inlen &= 127;
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in -= inlen;
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for (i = 0;i < inlen;++i) padded[i] = in[i];
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padded[inlen] = 0x80;
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if (inlen < 112) {
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for (i = inlen + 1;i < 119;++i) padded[i] = 0;
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padded[119] = bytes >> 61;
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padded[120] = bytes >> 53;
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padded[121] = bytes >> 45;
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padded[122] = bytes >> 37;
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padded[123] = bytes >> 29;
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padded[124] = bytes >> 21;
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padded[125] = bytes >> 13;
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padded[126] = bytes >> 5;
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padded[127] = bytes << 3;
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blocks(h,padded,128);
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} else {
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for (i = inlen + 1;i < 247;++i) padded[i] = 0;
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padded[247] = bytes >> 61;
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padded[248] = bytes >> 53;
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padded[249] = bytes >> 45;
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padded[250] = bytes >> 37;
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padded[251] = bytes >> 29;
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padded[252] = bytes >> 21;
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padded[253] = bytes >> 13;
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padded[254] = bytes >> 5;
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padded[255] = bytes << 3;
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blocks(h,padded,256);
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}
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for (i = 0;i < 64;++i) out[i] = h[i];
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return 0;
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}
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