libs/sha1/sha512.c

   1 /*
   2 ** Copyright 2008 Double Precision, Inc.
   3 ** See COPYING for distribution information.
   4 */
   5
   6 #define SHA1_INTERNAL
   7 #include        "sha1.h"
   8
   9 #include        <string.h>
  10 #include        <stdlib.h>
  11
  12
  13 #define ROTR(x,n) ((SHA512_WORD)(((SHA512_WORD)(x) >> (n))|((x) << (64-(n)))))
  14
  15 #define ROTL(x,n) ((SHA512_WORD)(((SHA512_WORD)(x) << (n))|((x) >> (64-(n)))))
  16
  17
  18 #define CH(x,y,z) ((SHA512_WORD)(((x) & (y)) ^ ((~(x))&(z))))
  19 #define MAJ(x,y,z) ((SHA512_WORD)(((x)&(y))^((x)&(z))^((y)&(z))))
  20
  21 #define SUM0(x) ((SHA512_WORD)(ROTR((x),28)^ROTR((x),34)^ROTR((x),39)))
  22 #define SUM1(x) ((SHA512_WORD)(ROTR((x),14)^ROTR((x),18)^ROTR((x),41)))
  23
  24 #define TH0(x) ((SHA512_WORD)(ROTR((x),1)^ROTR((x),8)^((SHA512_WORD)(x)>>7)))
  25 #define TH1(x) ((SHA512_WORD)(ROTR((x),19)^ROTR((x),61)^((SHA512_WORD)(x)>>6)))
  26
  27 static const SHA512_WORD K[80]={
  28         0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL, 0xb5c0fbcfec4d3b2fULL, 0xe9b5dba58189dbbcULL,
  29         0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL, 0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL,
  30         0xd807aa98a3030242ULL, 0x12835b0145706fbeULL, 0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL,
  31         0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL, 0x9bdc06a725c71235ULL, 0xc19bf174cf692694ULL,
  32         0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL, 0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL,
  33         0x2de92c6f592b0275ULL, 0x4a7484aa6ea6e483ULL, 0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL,
  34         0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL, 0xb00327c898fb213fULL, 0xbf597fc7beef0ee4ULL,
  35         0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL, 0x06ca6351e003826fULL, 0x142929670a0e6e70ULL,
  36         0x27b70a8546d22ffcULL, 0x2e1b21385c26c926ULL, 0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL,
  37         0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL, 0x81c2c92e47edaee6ULL, 0x92722c851482353bULL,
  38         0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL, 0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL,
  39         0xd192e819d6ef5218ULL, 0xd69906245565a910ULL, 0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL,
  40         0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL, 0x2748774cdf8eeb99ULL, 0x34b0bcb5e19b48a8ULL,
  41         0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL, 0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL,
  42         0x748f82ee5defb2fcULL, 0x78a5636f43172f60ULL, 0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL,
  43         0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL, 0xbef9a3f7b2c67915ULL, 0xc67178f2e372532bULL,
  44         0xca273eceea26619cULL, 0xd186b8c721c0c207ULL, 0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL,
  45         0x06f067aa72176fbaULL, 0x0a637dc5a2c898a6ULL, 0x113f9804bef90daeULL, 0x1b710b35131c471bULL,
  46         0x28db77f523047d84ULL, 0x32caab7b40c72493ULL, 0x3c9ebe0a15c9bebcULL, 0x431d67c49c100d4cULL,
  47         0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL, 0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL};
  48
  49 void sha512_context_init(struct SHA512_CONTEXT *c)
  50 {
  51         if (sizeof(SHA512_WORD) != 8)
  52                 abort();
  53
  54         c->H[0] = 0x6a09e667f3bcc908ULL;
  55         c->H[1] = 0xbb67ae8584caa73bULL;
  56         c->H[2] = 0x3c6ef372fe94f82bULL;
  57         c->H[3] = 0xa54ff53a5f1d36f1ULL;
  58         c->H[4] = 0x510e527fade682d1ULL;
  59         c->H[5] = 0x9b05688c2b3e6c1fULL;
  60         c->H[6] = 0x1f83d9abfb41bd6bULL;
  61         c->H[7] = 0x5be0cd19137e2179ULL;
  62
  63         c->blk_ptr=0;
  64 }
  65
  66 void sha512_context_hash(struct SHA512_CONTEXT *cc,
  67                          const unsigned char blk[SHA512_BLOCK_SIZE])
  68 {
  69         SHA512_WORD W[80];
  70         unsigned i, t;
  71         SHA512_WORD a,b,c,d,e,f,g,h;
  72
  73         for (i=t=0; t<16; t++)
  74         {
  75                 SHA512_WORD x=blk[i]; i++;
  76
  77                 x=(x << 8) | blk[i]; i++;
  78                 x=(x << 8) | blk[i]; i++;
  79                 x=(x << 8) | blk[i]; i++;
  80                 x=(x << 8) | blk[i]; i++;
  81                 x=(x << 8) | blk[i]; i++;
  82                 x=(x << 8) | blk[i]; i++;
  83                 W[t]=(x << 8) | blk[i]; i++;
  84         }
  85
  86         for (t=16; t<80; t++)
  87                 W[t]= TH1(W[t-2]) + W[t-7] + TH0(W[t-15]) + W[t-16];
  88
  89         a=cc->H[0];
  90         b=cc->H[1];
  91         c=cc->H[2];
  92         d=cc->H[3];
  93         e=cc->H[4];
  94         f=cc->H[5];
  95         g=cc->H[6];
  96         h=cc->H[7];
  97
  98         for (t=0; t<80; t++)
  99         {
 100                 SHA512_WORD T1=h + SUM1(e) + CH(e,f,g) + K[t] + W[t];
 101                 SHA512_WORD T2=SUM0(a)+MAJ(a,b,c);
 102                 h=g;
 103                 g=f;
 104                 f=e;
 105                 e=d+T1;
 106                 d=c;
 107                 c=b;
 108                 b=a;
 109                 a=T1+T2;
 110         }
 111
 112         cc->H[0] += a;
 113         cc->H[1] += b;
 114         cc->H[2] += c;
 115         cc->H[3] += d;
 116         cc->H[4] += e;
 117         cc->H[5] += f;
 118         cc->H[6] += g;
 119         cc->H[7] += h;
 120 }
 121
 122 void sha512_context_hashstream(struct SHA512_CONTEXT *c, const void *p, unsigned l)
 123 {
 124         const unsigned char *cp=(const unsigned char *)p;
 125         unsigned ll;
 126
 127         while (l)
 128         {
 129                 if (c->blk_ptr == 0 && l >= SHA512_BLOCK_SIZE)
 130                 {
 131                         sha512_context_hash(c, cp);
 132                         cp += SHA512_BLOCK_SIZE;
 133                         l -= SHA512_BLOCK_SIZE;
 134                         continue;
 135                 }
 136
 137                 ll=l;
 138                 if (ll > SHA512_BLOCK_SIZE - c->blk_ptr)
 139                         ll=SHA512_BLOCK_SIZE - c->blk_ptr;
 140                 memcpy(c->blk + c->blk_ptr, cp, ll);
 141                 c->blk_ptr += ll;
 142                 cp += ll;
 143                 l -= ll;
 144                 if (c->blk_ptr >= SHA512_BLOCK_SIZE)
 145                 {
 146                         sha512_context_hash(c, c->blk);
 147                         c->blk_ptr=0;
 148                 }
 149         }
 150 }
 151
 152 void sha512_context_endstream(struct SHA512_CONTEXT *c, SHA512_WORD l)
 153 {
 154         unsigned char buf[16];
 155         size_t i;
 156         static const unsigned char zero[SHA512_BLOCK_SIZE-8];
 157
 158         buf[0]=0x80;
 159         sha512_context_hashstream(c, &buf, 1);
 160         while (c->blk_ptr != SHA512_BLOCK_SIZE-16)
 161         {
 162                 if (c->blk_ptr > SHA512_BLOCK_SIZE-16)
 163                 {
 164                         sha512_context_hashstream(c, zero,
 165                                 SHA512_BLOCK_SIZE - c->blk_ptr);
 166                         continue;
 167                 }
 168                 sha512_context_hashstream(c, zero,
 169                         SHA512_BLOCK_SIZE-16-c->blk_ptr);
 170         }
 171
 172         l *= 8;
 173
 174         for (i=0; i<16; i++)
 175         {
 176                 buf[15-i]=l;
 177                 l >>= 8;
 178         }
 179
 180         sha512_context_hashstream(c, buf, sizeof(buf));
 181 }
 182
 183 void sha512_context_digest(struct SHA512_CONTEXT *c, SHA512_DIGEST d)
 184 {
 185         unsigned char *dp=d + SHA512_DIGEST_SIZE;
 186         unsigned i;
 187
 188         for ( i=8; i; )
 189         {
 190                 SHA512_WORD     w=c->H[--i];
 191
 192                 *--dp=w; w >>= 8;
 193                 *--dp=w; w >>= 8;
 194                 *--dp=w; w >>= 8;
 195                 *--dp=w; w >>= 8;
 196                 *--dp=w; w >>= 8;
 197                 *--dp=w; w >>= 8;
 198                 *--dp=w; w >>= 8;
 199                 *--dp=w;
 200         }
 201 }
 202
 203 void sha512_context_restore(struct SHA512_CONTEXT *c, const SHA512_DIGEST d)
 204 {
 205         const unsigned char *dp=d;
 206         unsigned i;
 207
 208         for (i=0; i<8; i++)
 209         {
 210                 SHA512_WORD     w= *dp++;
 211
 212                 w=(w << 8) | *dp++;
 213                 w=(w << 8) | *dp++;
 214                 w=(w << 8) | *dp++;
 215                 w=(w << 8) | *dp++;
 216                 w=(w << 8) | *dp++;
 217                 w=(w << 8) | *dp++;
 218                 w=(w << 8) | *dp++;
 219                 c->H[i]=w;
 220         }
 221         c->blk_ptr=0;
 222 }
 223
 224 void sha512_digest(const void *msg, unsigned len, SHA512_DIGEST d)
 225 {
 226         struct SHA512_CONTEXT c;
 227
 228         sha512_context_init( &c );
 229         sha512_context_hashstream(&c, msg, len);
 230         sha512_context_endstream(&c, len);
 231         sha512_context_digest( &c, d );
 232 }