1 /* $OpenBSD: hash.c,v 1.3 2013/12/09 11:03:45 markus Exp $ */
2
3 /* Copied from nacl-20110221/crypto_hash/sha512/ref/hash.c */
4
5 /*
6 20080913
7 D. J. Bernstein
8 Public domain.
9 */
10
11 #include "includes.h"
12
13 #include "crypto_api.h"
14
15 #define blocks crypto_hashblocks_sha512
16
17 static const unsigned char iv[64] = {
18 0x6a,0x09,0xe6,0x67,0xf3,0xbc,0xc9,0x08,
19 0xbb,0x67,0xae,0x85,0x84,0xca,0xa7,0x3b,
20 0x3c,0x6e,0xf3,0x72,0xfe,0x94,0xf8,0x2b,
21 0xa5,0x4f,0xf5,0x3a,0x5f,0x1d,0x36,0xf1,
22 0x51,0x0e,0x52,0x7f,0xad,0xe6,0x82,0xd1,
23 0x9b,0x05,0x68,0x8c,0x2b,0x3e,0x6c,0x1f,
24 0x1f,0x83,0xd9,0xab,0xfb,0x41,0xbd,0x6b,
25 0x5b,0xe0,0xcd,0x19,0x13,0x7e,0x21,0x79
26 } ;
27
28 typedef unsigned long long uint64;
29
crypto_hash_sha512(unsigned char * out,const unsigned char * in,unsigned long long inlen)30 int crypto_hash_sha512(unsigned char *out,const unsigned char *in,unsigned long long inlen)
31 {
32 unsigned char h[64];
33 unsigned char padded[256];
34 unsigned int i;
35 unsigned long long bytes = inlen;
36
37 for (i = 0;i < 64;++i) h[i] = iv[i];
38
39 blocks(h,in,inlen);
40 in += inlen;
41 inlen &= 127;
42 in -= inlen;
43
44 for (i = 0;i < inlen;++i) padded[i] = in[i];
45 padded[inlen] = 0x80;
46
47 if (inlen < 112) {
48 for (i = inlen + 1;i < 119;++i) padded[i] = 0;
49 padded[119] = bytes >> 61;
50 padded[120] = bytes >> 53;
51 padded[121] = bytes >> 45;
52 padded[122] = bytes >> 37;
53 padded[123] = bytes >> 29;
54 padded[124] = bytes >> 21;
55 padded[125] = bytes >> 13;
56 padded[126] = bytes >> 5;
57 padded[127] = bytes << 3;
58 blocks(h,padded,128);
59 } else {
60 for (i = inlen + 1;i < 247;++i) padded[i] = 0;
61 padded[247] = bytes >> 61;
62 padded[248] = bytes >> 53;
63 padded[249] = bytes >> 45;
64 padded[250] = bytes >> 37;
65 padded[251] = bytes >> 29;
66 padded[252] = bytes >> 21;
67 padded[253] = bytes >> 13;
68 padded[254] = bytes >> 5;
69 padded[255] = bytes << 3;
70 blocks(h,padded,256);
71 }
72
73 for (i = 0;i < 64;++i) out[i] = h[i];
74
75 return 0;
76 }
77