libsodium: Needed for Dnscrypto-proxy Release 1.3.0
[tomato.git] / release / src / router / libsodium / src / libsodium / crypto_hash / sha256 / ref / hash_sha256.c
blob774271d65cd539c4568699c868e44c28911ce4cb
1 /*
2 20080913
3 D. J. Bernstein
4 Public domain.
5 */
7 #include "api.h"
8 #include "crypto_hashblocks_sha256.h"
10 #define blocks crypto_hashblocks_sha256
12 typedef unsigned int uint32;
14 static const char iv[32] = {
15 0x6a,0x09,0xe6,0x67,
16 0xbb,0x67,0xae,0x85,
17 0x3c,0x6e,0xf3,0x72,
18 0xa5,0x4f,0xf5,0x3a,
19 0x51,0x0e,0x52,0x7f,
20 0x9b,0x05,0x68,0x8c,
21 0x1f,0x83,0xd9,0xab,
22 0x5b,0xe0,0xcd,0x19,
23 } ;
25 int crypto_hash(unsigned char *out,const unsigned char *in,unsigned long long inlen)
27 unsigned char h[32];
28 unsigned char padded[128];
29 unsigned long long i;
30 unsigned long long bits = inlen << 3;
32 for (i = 0;i < 32;++i) h[i] = iv[i];
34 blocks(h,in,inlen);
35 in += inlen;
36 inlen &= 63;
37 in -= inlen;
39 for (i = 0;i < inlen;++i) padded[i] = in[i];
40 padded[inlen] = 0x80;
42 if (inlen < 56) {
43 for (i = inlen + 1;i < 56;++i) padded[i] = 0;
44 padded[56] = bits >> 56;
45 padded[57] = bits >> 48;
46 padded[58] = bits >> 40;
47 padded[59] = bits >> 32;
48 padded[60] = bits >> 24;
49 padded[61] = bits >> 16;
50 padded[62] = bits >> 8;
51 padded[63] = bits;
52 blocks(h,padded,64);
53 } else {
54 for (i = inlen + 1;i < 120;++i) padded[i] = 0;
55 padded[120] = bits >> 56;
56 padded[121] = bits >> 48;
57 padded[122] = bits >> 40;
58 padded[123] = bits >> 32;
59 padded[124] = bits >> 24;
60 padded[125] = bits >> 16;
61 padded[126] = bits >> 8;
62 padded[127] = bits;
63 blocks(h,padded,128);
66 for (i = 0;i < 32;++i) out[i] = h[i];
68 return 0;