target/linux/generic-2.4/files/crypto/ocf/kirkwood/cesa/mvSHA1.c

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  64
  65 #include "mvOs.h"
  66 #include "mvSHA1.h"
  67
  68 #define SHA1HANDSOFF
  69
  70 typedef union
  71 {
  72     MV_U8   c[64];
  73     MV_U32  l[16];
  74
  75 } CHAR64LONG16;
  76
  77 static void mvSHA1Transform(MV_U32 state[5], const MV_U8 *buffer);
  78
  79 #define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits))))
  80
  81
  82 #ifdef MV_CPU_LE
  83 #define blk0(i) (block->l[i] = (rol(block->l[i], 24) & 0xFF00FF00) | \
  84         (rol(block->l[i], 8) & 0x00FF00FF))
  85 #else
  86 #define blk0(i) block->l[i]
  87 #endif
  88 #define blk(i) (block->l[i & 15] = rol(block->l[(i + 13) & 15] ^ \
  89         block->l[(i + 8) & 15] ^ block->l[(i + 2) & 15] ^ block->l[i & 15], 1))
  90
  91 /* (R0+R1), R2, R3, R4 are the different operations used in SHA1 */
  92 #define R0(v,w,x,y,z,i) \
  93         z += ((w & (x ^ y)) ^ y) + blk0(i) + 0x5A827999 + rol(v, 5); \
  94         w = rol(w, 30);
  95 #define R1(v,w,x,y,z,i) \
  96         z += ((w & (x ^ y)) ^ y) + blk(i) + 0x5A827999 + rol(v, 5); \
  97         w = rol(w, 30);
  98 #define R2(v,w,x,y,z,i) \
  99         z += (w ^ x ^ y) + blk(i) + 0x6ED9EBA1 + rol(v, 5); w = rol(w, 30);
 100 #define R3(v,w,x,y,z,i) \
 101         z += (((w | x) & y) | (w & x)) + blk(i) + 0x8F1BBCDC + rol(v, 5); \
 102         w = rol(w, 30);
 103 #define R4(v,w,x,y,z,i) \
 104         z += (w ^ x ^ y) + blk(i) + 0xCA62C1D6 + rol(v, 5); \
 105         w=rol(w, 30);
 106
 107 /* Hash a single 512-bit block. This is the core of the algorithm. */
 108 static void    mvSHA1Transform(MV_U32 state[5], const MV_U8 *buffer)
 109 {
 110     MV_U32          a, b, c, d, e;
 111     CHAR64LONG16*   block;
 112
 113 #ifdef SHA1HANDSOFF
 114     static MV_U32  workspace[16];
 115
 116     block = (CHAR64LONG16 *) workspace;
 117     memcpy(block, buffer, 64);
 118 #else
 119     block = (CHAR64LONG16 *) buffer;
 120 #endif
 121     /* Copy context->state[] to working vars */
 122     a = state[0];
 123     b = state[1];
 124     c = state[2];
 125     d = state[3];
 126     e = state[4];
 127     /* 4 rounds of 20 operations each. Loop unrolled. */
 128     R0(a,b,c,d,e, 0); R0(e,a,b,c,d, 1); R0(d,e,a,b,c, 2); R0(c,d,e,a,b, 3);
 129     R0(b,c,d,e,a, 4); R0(a,b,c,d,e, 5); R0(e,a,b,c,d, 6); R0(d,e,a,b,c, 7);
 130     R0(c,d,e,a,b, 8); R0(b,c,d,e,a, 9); R0(a,b,c,d,e,10); R0(e,a,b,c,d,11);
 131     R0(d,e,a,b,c,12); R0(c,d,e,a,b,13); R0(b,c,d,e,a,14); R0(a,b,c,d,e,15);
 132     R1(e,a,b,c,d,16); R1(d,e,a,b,c,17); R1(c,d,e,a,b,18); R1(b,c,d,e,a,19);
 133     R2(a,b,c,d,e,20); R2(e,a,b,c,d,21); R2(d,e,a,b,c,22); R2(c,d,e,a,b,23);
 134     R2(b,c,d,e,a,24); R2(a,b,c,d,e,25); R2(e,a,b,c,d,26); R2(d,e,a,b,c,27);
 135     R2(c,d,e,a,b,28); R2(b,c,d,e,a,29); R2(a,b,c,d,e,30); R2(e,a,b,c,d,31);
 136     R2(d,e,a,b,c,32); R2(c,d,e,a,b,33); R2(b,c,d,e,a,34); R2(a,b,c,d,e,35);
 137     R2(e,a,b,c,d,36); R2(d,e,a,b,c,37); R2(c,d,e,a,b,38); R2(b,c,d,e,a,39);
 138     R3(a,b,c,d,e,40); R3(e,a,b,c,d,41); R3(d,e,a,b,c,42); R3(c,d,e,a,b,43);
 139     R3(b,c,d,e,a,44); R3(a,b,c,d,e,45); R3(e,a,b,c,d,46); R3(d,e,a,b,c,47);
 140     R3(c,d,e,a,b,48); R3(b,c,d,e,a,49); R3(a,b,c,d,e,50); R3(e,a,b,c,d,51);
 141     R3(d,e,a,b,c,52); R3(c,d,e,a,b,53); R3(b,c,d,e,a,54); R3(a,b,c,d,e,55);
 142     R3(e,a,b,c,d,56); R3(d,e,a,b,c,57); R3(c,d,e,a,b,58); R3(b,c,d,e,a,59);
 143     R4(a,b,c,d,e,60); R4(e,a,b,c,d,61); R4(d,e,a,b,c,62); R4(c,d,e,a,b,63);
 144     R4(b,c,d,e,a,64); R4(a,b,c,d,e,65); R4(e,a,b,c,d,66); R4(d,e,a,b,c,67);
 145     R4(c,d,e,a,b,68); R4(b,c,d,e,a,69); R4(a,b,c,d,e,70); R4(e,a,b,c,d,71);
 146     R4(d,e,a,b,c,72); R4(c,d,e,a,b,73); R4(b,c,d,e,a,74); R4(a,b,c,d,e,75);
 147     R4(e,a,b,c,d,76); R4(d,e,a,b,c,77); R4(c,d,e,a,b,78); R4(b,c,d,e,a,79);
 148     /* Add the working vars back into context.state[] */
 149     state[0] += a;
 150     state[1] += b;
 151     state[2] += c;
 152     state[3] += d;
 153     state[4] += e;
 154     /* Wipe variables */
 155     a = b = c = d = e = 0;
 156 }
 157
 158 void    mvSHA1Init(MV_SHA1_CTX* context)
 159 {
 160     /* SHA1 initialization constants */
 161     context->state[0] = 0x67452301;
 162     context->state[1] = 0xEFCDAB89;
 163     context->state[2] = 0x98BADCFE;
 164     context->state[3] = 0x10325476;
 165     context->state[4] = 0xC3D2E1F0;
 166     context->count[0] = context->count[1] = 0;
 167 }
 168
 169
 170 /* Run your data through this. */
 171 void    mvSHA1Update(MV_SHA1_CTX *context, MV_U8 const *data,
 172                      unsigned int len)
 173 {
 174     MV_U32 i, j;
 175
 176     j = (context->count[0] >> 3) & 63;
 177     if ((context->count[0] += len << 3) < (len << 3))
 178             context->count[1]++;
 179     context->count[1] += (len >> 29);
 180     if ((j + len) > 63)
 181     {
 182         memcpy(&context->buffer[j], data, (i = 64-j));
 183         mvSHA1Transform(context->state, context->buffer);
 184         for ( ; i + 63 < len; i += 64)
 185         {
 186             mvSHA1Transform(context->state, &data[i]);
 187         }
 188         j = 0;
 189     }
 190     else
 191     {
 192         i = 0;
 193     }
 194     memcpy(&context->buffer[j], &data[i], len - i);
 195 }
 196
 197 void    mvSHA1Final(MV_U8* digest, MV_SHA1_CTX* context)
 198 {
 199     MV_U32  i;
 200     MV_U8   finalcount[8];
 201
 202     for (i = 0; i < 8; i++)
 203     {
 204         finalcount[i] = (unsigned char)((context->count[(i >= 4 ? 0 : 1)] >>
 205                       ((3-(i & 3)) * 8) ) & 255);  /* Endian independent */
 206     }
 207     mvSHA1Update(context, (const unsigned char *) "\200", 1);
 208     while ((context->count[0] & 504) != 448)
 209     {
 210         mvSHA1Update(context, (const unsigned char *) "\0", 1);
 211     }
 212     mvSHA1Update(context, finalcount, 8);  /* Should cause a mvSHA1Transform()
 213                                           */
 214     for (i = 0; i < 20; i++)
 215     {
 216         digest[i] = (unsigned char)
 217                     ((context->state[i >> 2] >> ((3 - (i & 3)) * 8)) & 255);
 218     }
 219     /* Wipe variables */
 220     i = 0;
 221     memset(context->buffer, 0, 64);
 222     memset(context->state, 0, 20);
 223     memset(context->count, 0, 8);
 224     memset(finalcount, 0, 8);
 225
 226 #ifdef SHA1HANDSOFF  /* make SHA1Transform overwrite it's own static vars */
 227     mvSHA1Transform(context->state, context->buffer);
 228 #endif
 229 }
 230
 231
 232 void mvSHA1(MV_U8 const *buf, unsigned int len, MV_U8* digest)
 233 {
 234     MV_SHA1_CTX  ctx;
 235
 236     mvSHA1Init(&ctx);
 237     mvSHA1Update(&ctx, buf, len);
 238     mvSHA1Final(digest, &ctx);
 239 }