Geremia G / Crypto

Fork of François Berder Crypto, fixed AES CBC and small rework

Dependents:   AES_example shaun_larada Smartage

Fork of Crypto by Francois Berder

SHA2_64.cpp@0:7a1237bd2d13, 2013-09-07 (annotated)

Committer:
feb11
Date:
Sat Sep 07 23:47:28 2013 +0000
Revision:
0:7a1237bd2d13
Child:
3:85c6ee25cf3e
initial import

Who changed what in which revision?

UserRevisionLine numberNew contents of line
feb11 0:7a1237bd2d13 1 #include "SHA2_64.h"
feb11 0:7a1237bd2d13 2 #include <string.h>
feb11 0:7a1237bd2d13 3
feb11 0:7a1237bd2d13 4
feb11 0:7a1237bd2d13 5 static const uint64_t K[] =
feb11 0:7a1237bd2d13 6 {
feb11 0:7a1237bd2d13 7 0x428a2f98d728ae22, 0x7137449123ef65cd, 0xb5c0fbcfec4d3b2f, 0xe9b5dba58189dbbc,
feb11 0:7a1237bd2d13 8 0x3956c25bf348b538, 0x59f111f1b605d019, 0x923f82a4af194f9b, 0xab1c5ed5da6d8118,
feb11 0:7a1237bd2d13 9 0xd807aa98a3030242, 0x12835b0145706fbe, 0x243185be4ee4b28c, 0x550c7dc3d5ffb4e2,
feb11 0:7a1237bd2d13 10 0x72be5d74f27b896f, 0x80deb1fe3b1696b1, 0x9bdc06a725c71235, 0xc19bf174cf692694,
feb11 0:7a1237bd2d13 11 0xe49b69c19ef14ad2, 0xefbe4786384f25e3, 0x0fc19dc68b8cd5b5, 0x240ca1cc77ac9c65,
feb11 0:7a1237bd2d13 12 0x2de92c6f592b0275, 0x4a7484aa6ea6e483, 0x5cb0a9dcbd41fbd4, 0x76f988da831153b5,
feb11 0:7a1237bd2d13 13 0x983e5152ee66dfab, 0xa831c66d2db43210, 0xb00327c898fb213f, 0xbf597fc7beef0ee4,
feb11 0:7a1237bd2d13 14 0xc6e00bf33da88fc2, 0xd5a79147930aa725, 0x06ca6351e003826f, 0x142929670a0e6e70,
feb11 0:7a1237bd2d13 15 0x27b70a8546d22ffc, 0x2e1b21385c26c926, 0x4d2c6dfc5ac42aed, 0x53380d139d95b3df,
feb11 0:7a1237bd2d13 16 0x650a73548baf63de, 0x766a0abb3c77b2a8, 0x81c2c92e47edaee6, 0x92722c851482353b,
feb11 0:7a1237bd2d13 17 0xa2bfe8a14cf10364, 0xa81a664bbc423001, 0xc24b8b70d0f89791, 0xc76c51a30654be30,
feb11 0:7a1237bd2d13 18 0xd192e819d6ef5218, 0xd69906245565a910, 0xf40e35855771202a, 0x106aa07032bbd1b8,
feb11 0:7a1237bd2d13 19 0x19a4c116b8d2d0c8, 0x1e376c085141ab53, 0x2748774cdf8eeb99, 0x34b0bcb5e19b48a8,
feb11 0:7a1237bd2d13 20 0x391c0cb3c5c95a63, 0x4ed8aa4ae3418acb, 0x5b9cca4f7763e373, 0x682e6ff3d6b2b8a3,
feb11 0:7a1237bd2d13 21 0x748f82ee5defb2fc, 0x78a5636f43172f60, 0x84c87814a1f0ab72, 0x8cc702081a6439ec,
feb11 0:7a1237bd2d13 22 0x90befffa23631e28, 0xa4506cebde82bde9, 0xbef9a3f7b2c67915, 0xc67178f2e372532b,
feb11 0:7a1237bd2d13 23 0xca273eceea26619c, 0xd186b8c721c0c207, 0xeada7dd6cde0eb1e, 0xf57d4f7fee6ed178,
feb11 0:7a1237bd2d13 24 0x06f067aa72176fba, 0x0a637dc5a2c898a6, 0x113f9804bef90dae, 0x1b710b35131c471b,
feb11 0:7a1237bd2d13 25 0x28db77f523047d84, 0x32caab7b40c72493, 0x3c9ebe0a15c9bebc, 0x431d67c49c100d4c,
feb11 0:7a1237bd2d13 26 0x4cc5d4becb3e42b6, 0x597f299cfc657e2a, 0x5fcb6fab3ad6faec, 0x6c44198c4a475817
feb11 0:7a1237bd2d13 27 };
feb11 0:7a1237bd2d13 28
feb11 0:7a1237bd2d13 29 static const uint64_t H[] =
feb11 0:7a1237bd2d13 30 {
feb11 0:7a1237bd2d13 31 // SHA-384
feb11 0:7a1237bd2d13 32 0xcbbb9d5dc1059ed8, 0x629a292a367cd507, 0x9159015a3070dd17, 0x152fecd8f70e5939,
feb11 0:7a1237bd2d13 33 0x67332667ffc00b31, 0x8eb44a8768581511, 0xdb0c2e0d64f98fa7, 0x47b5481dbefa4fa4,
feb11 0:7a1237bd2d13 34
feb11 0:7a1237bd2d13 35 // SHA-512
feb11 0:7a1237bd2d13 36 0x6a09e667f3bcc908, 0xbb67ae8584caa73b, 0x3c6ef372fe94f82b, 0xa54ff53a5f1d36f1,
feb11 0:7a1237bd2d13 37 0x510e527fade682d1, 0x9b05688c2b3e6c1f, 0x1f83d9abfb41bd6b, 0x5be0cd19137e2179
feb11 0:7a1237bd2d13 38 };
feb11 0:7a1237bd2d13 39
feb11 0:7a1237bd2d13 40 static uint64_t revWord(uint64_t w)
feb11 0:7a1237bd2d13 41 {
feb11 0:7a1237bd2d13 42 uint8_t buffer[8];
feb11 0:7a1237bd2d13 43 buffer[0] = w >> 56;
feb11 0:7a1237bd2d13 44 buffer[1] = w >> 48;
feb11 0:7a1237bd2d13 45 buffer[2] = w >> 40;
feb11 0:7a1237bd2d13 46 buffer[3] = w >> 32;
feb11 0:7a1237bd2d13 47 buffer[4] = w >> 24;
feb11 0:7a1237bd2d13 48 buffer[5] = w >> 16;
feb11 0:7a1237bd2d13 49 buffer[6] = w >> 8;
feb11 0:7a1237bd2d13 50 buffer[7] = w;
feb11 0:7a1237bd2d13 51
feb11 0:7a1237bd2d13 52 uint64_t res = buffer[7];
feb11 0:7a1237bd2d13 53 res <<= 8;
feb11 0:7a1237bd2d13 54 res |= buffer[6];
feb11 0:7a1237bd2d13 55 res <<= 8;
feb11 0:7a1237bd2d13 56 res |= buffer[5];
feb11 0:7a1237bd2d13 57 res <<= 8;
feb11 0:7a1237bd2d13 58 res |= buffer[4];
feb11 0:7a1237bd2d13 59 res <<= 8;
feb11 0:7a1237bd2d13 60 res |= buffer[3];
feb11 0:7a1237bd2d13 61 res <<= 8;
feb11 0:7a1237bd2d13 62 res |= buffer[2];
feb11 0:7a1237bd2d13 63 res <<= 8;
feb11 0:7a1237bd2d13 64 res |= buffer[1];
feb11 0:7a1237bd2d13 65 res <<= 8;
feb11 0:7a1237bd2d13 66 res |= buffer[0];
feb11 0:7a1237bd2d13 67
feb11 0:7a1237bd2d13 68 return res;
feb11 0:7a1237bd2d13 69 }
feb11 0:7a1237bd2d13 70
feb11 0:7a1237bd2d13 71 static uint64_t rotLeft(uint64_t w, uint8_t n)
feb11 0:7a1237bd2d13 72 {
feb11 0:7a1237bd2d13 73 return (w << n) | (w >> (64-n));
feb11 0:7a1237bd2d13 74 }
feb11 0:7a1237bd2d13 75
feb11 0:7a1237bd2d13 76 static uint64_t rotRight(uint64_t w, uint8_t n)
feb11 0:7a1237bd2d13 77 {
feb11 0:7a1237bd2d13 78 return rotLeft(w,64-n);
feb11 0:7a1237bd2d13 79 }
feb11 0:7a1237bd2d13 80
feb11 0:7a1237bd2d13 81 static uint64_t CH(uint64_t x, uint64_t y, uint64_t z)
feb11 0:7a1237bd2d13 82 {
feb11 0:7a1237bd2d13 83 return (x & y) ^ ((~x) & z);
feb11 0:7a1237bd2d13 84 }
feb11 0:7a1237bd2d13 85
feb11 0:7a1237bd2d13 86 static uint64_t MAJ(uint64_t x, uint64_t y, uint64_t z)
feb11 0:7a1237bd2d13 87 {
feb11 0:7a1237bd2d13 88 return (x & y) ^ (x & z) ^ (y & z);
feb11 0:7a1237bd2d13 89 }
feb11 0:7a1237bd2d13 90
feb11 0:7a1237bd2d13 91 static uint64_t BSIG0(uint64_t x)
feb11 0:7a1237bd2d13 92 {
feb11 0:7a1237bd2d13 93 return rotRight(x,28) ^ rotRight(x,34) ^ rotRight(x,39);
feb11 0:7a1237bd2d13 94 }
feb11 0:7a1237bd2d13 95
feb11 0:7a1237bd2d13 96 static uint64_t BSIG1(uint64_t x)
feb11 0:7a1237bd2d13 97 {
feb11 0:7a1237bd2d13 98 return rotRight(x,14) ^ rotRight(x,18) ^ rotRight(x,41);
feb11 0:7a1237bd2d13 99 }
feb11 0:7a1237bd2d13 100
feb11 0:7a1237bd2d13 101 static uint64_t SSIG0(uint64_t x)
feb11 0:7a1237bd2d13 102 {
feb11 0:7a1237bd2d13 103 return rotRight(x,1) ^ rotRight(x,8) ^ (x >> 7);
feb11 0:7a1237bd2d13 104 }
feb11 0:7a1237bd2d13 105
feb11 0:7a1237bd2d13 106 static uint64_t SSIG1(uint64_t x)
feb11 0:7a1237bd2d13 107 {
feb11 0:7a1237bd2d13 108 return rotRight(x,19) ^ rotRight(x,61) ^ (x>>6);
feb11 0:7a1237bd2d13 109 }
feb11 0:7a1237bd2d13 110
feb11 0:7a1237bd2d13 111 SHA2_64::SHA2_64(SHA2_64_TYPE t):
feb11 0:7a1237bd2d13 112 type(t),
feb11 0:7a1237bd2d13 113 totalBufferLength(0),
feb11 0:7a1237bd2d13 114 bufferLength(0)
feb11 0:7a1237bd2d13 115 {
feb11 0:7a1237bd2d13 116 switch(type)
feb11 0:7a1237bd2d13 117 {
feb11 0:7a1237bd2d13 118 case SHA_384:
feb11 0:7a1237bd2d13 119 h0 = H[0];
feb11 0:7a1237bd2d13 120 h1 = H[1];
feb11 0:7a1237bd2d13 121 h2 = H[2];
feb11 0:7a1237bd2d13 122 h3 = H[3];
feb11 0:7a1237bd2d13 123 h4 = H[4];
feb11 0:7a1237bd2d13 124 h5 = H[5];
feb11 0:7a1237bd2d13 125 h6 = H[6];
feb11 0:7a1237bd2d13 126 h7 = H[7];
feb11 0:7a1237bd2d13 127 break;
feb11 0:7a1237bd2d13 128
feb11 0:7a1237bd2d13 129 case SHA_512:
feb11 0:7a1237bd2d13 130 h0 = H[8];
feb11 0:7a1237bd2d13 131 h1 = H[9];
feb11 0:7a1237bd2d13 132 h2 = H[10];
feb11 0:7a1237bd2d13 133 h3 = H[11];
feb11 0:7a1237bd2d13 134 h4 = H[12];
feb11 0:7a1237bd2d13 135 h5 = H[13];
feb11 0:7a1237bd2d13 136 h6 = H[14];
feb11 0:7a1237bd2d13 137 h7 = H[15];
feb11 0:7a1237bd2d13 138 break;
feb11 0:7a1237bd2d13 139 }
feb11 0:7a1237bd2d13 140 }
feb11 0:7a1237bd2d13 141
feb11 0:7a1237bd2d13 142 void SHA2_64::add(uint8_t *in, uint32_t length)
feb11 0:7a1237bd2d13 143 {
feb11 0:7a1237bd2d13 144 if(length < 128-bufferLength)
feb11 0:7a1237bd2d13 145 {
feb11 0:7a1237bd2d13 146 memcpy(&buffer[bufferLength], in, length);
feb11 0:7a1237bd2d13 147 bufferLength += length;
feb11 0:7a1237bd2d13 148 totalBufferLength += length;
feb11 0:7a1237bd2d13 149 return;
feb11 0:7a1237bd2d13 150 }
feb11 0:7a1237bd2d13 151 int offset = 128-bufferLength;
feb11 0:7a1237bd2d13 152 memcpy(&buffer[bufferLength], in, offset);
feb11 0:7a1237bd2d13 153 computeBlock(&h0,&h1,&h2,&h3,&h4,&h5,&h6,&h7,buffer);
feb11 0:7a1237bd2d13 154 while(length-offset > 128)
feb11 0:7a1237bd2d13 155 {
feb11 0:7a1237bd2d13 156 memcpy(buffer, &in[offset], 128);
feb11 0:7a1237bd2d13 157 computeBlock(&h0,&h1,&h2,&h3,&h4,&h5,&h6,&h7,buffer);
feb11 0:7a1237bd2d13 158 offset += 128;
feb11 0:7a1237bd2d13 159 }
feb11 0:7a1237bd2d13 160 if(offset > length)
feb11 0:7a1237bd2d13 161 offset -= 128;
feb11 0:7a1237bd2d13 162 bufferLength = length - offset;
feb11 0:7a1237bd2d13 163 memcpy(buffer, &in[offset], bufferLength);
feb11 0:7a1237bd2d13 164 totalBufferLength += length;
feb11 0:7a1237bd2d13 165 }
feb11 0:7a1237bd2d13 166
feb11 0:7a1237bd2d13 167 void SHA2_64::computeDigest(uint8_t *digest)
feb11 0:7a1237bd2d13 168 {
feb11 0:7a1237bd2d13 169 uint16_t padding;
feb11 0:7a1237bd2d13 170 if(totalBufferLength % 128 < 112)
feb11 0:7a1237bd2d13 171 padding = 112 - (totalBufferLength % 128);
feb11 0:7a1237bd2d13 172 else
feb11 0:7a1237bd2d13 173 padding = 112 + (128 - (totalBufferLength % 128));
feb11 0:7a1237bd2d13 174 uint8_t val = 0x80;
feb11 0:7a1237bd2d13 175 add(&val, 1);
feb11 0:7a1237bd2d13 176 val = 0;
feb11 0:7a1237bd2d13 177 for(int i = 0; i < padding-1; ++i)
feb11 0:7a1237bd2d13 178 add(&val,1);
feb11 0:7a1237bd2d13 179 totalBufferLength -= padding;
feb11 0:7a1237bd2d13 180 uint64_t lengthBit = 0;
feb11 0:7a1237bd2d13 181 add((uint8_t*)&lengthBit, 8);
feb11 0:7a1237bd2d13 182 lengthBit = (totalBufferLength - 8) * 8;
feb11 0:7a1237bd2d13 183 lengthBit = revWord(lengthBit);
feb11 0:7a1237bd2d13 184 add((uint8_t*)&lengthBit, 8);
feb11 0:7a1237bd2d13 185
feb11 0:7a1237bd2d13 186 h0 = revWord(h0);
feb11 0:7a1237bd2d13 187 h1 = revWord(h1);
feb11 0:7a1237bd2d13 188 h2 = revWord(h2);
feb11 0:7a1237bd2d13 189 h3 = revWord(h3);
feb11 0:7a1237bd2d13 190 h4 = revWord(h4);
feb11 0:7a1237bd2d13 191 h5 = revWord(h5);
feb11 0:7a1237bd2d13 192
feb11 0:7a1237bd2d13 193
feb11 0:7a1237bd2d13 194 memcpy(digest, &h0, 8);
feb11 0:7a1237bd2d13 195 memcpy(&digest[8], &h1, 8);
feb11 0:7a1237bd2d13 196 memcpy(&digest[16], &h2, 8);
feb11 0:7a1237bd2d13 197 memcpy(&digest[24], &h3, 8);
feb11 0:7a1237bd2d13 198 memcpy(&digest[32], &h4, 8);
feb11 0:7a1237bd2d13 199 memcpy(&digest[40], &h5, 8);
feb11 0:7a1237bd2d13 200
feb11 0:7a1237bd2d13 201 if(type == SHA_512)
feb11 0:7a1237bd2d13 202 {
feb11 0:7a1237bd2d13 203 h6 = revWord(h6);
feb11 0:7a1237bd2d13 204 h7 = revWord(h7);
feb11 0:7a1237bd2d13 205 memcpy(&digest[48], &h6, 8);
feb11 0:7a1237bd2d13 206 memcpy(&digest[56], &h7, 8);
feb11 0:7a1237bd2d13 207 }
feb11 0:7a1237bd2d13 208
feb11 0:7a1237bd2d13 209 // reset state
feb11 0:7a1237bd2d13 210 switch(type)
feb11 0:7a1237bd2d13 211 {
feb11 0:7a1237bd2d13 212 case SHA_384:
feb11 0:7a1237bd2d13 213 h0 = H[0];
feb11 0:7a1237bd2d13 214 h1 = H[1];
feb11 0:7a1237bd2d13 215 h2 = H[2];
feb11 0:7a1237bd2d13 216 h3 = H[3];
feb11 0:7a1237bd2d13 217 h4 = H[4];
feb11 0:7a1237bd2d13 218 h5 = H[5];
feb11 0:7a1237bd2d13 219 h6 = H[6];
feb11 0:7a1237bd2d13 220 h7 = H[7];
feb11 0:7a1237bd2d13 221 break;
feb11 0:7a1237bd2d13 222
feb11 0:7a1237bd2d13 223 case SHA_512:
feb11 0:7a1237bd2d13 224 h0 = H[8];
feb11 0:7a1237bd2d13 225 h1 = H[9];
feb11 0:7a1237bd2d13 226 h2 = H[10];
feb11 0:7a1237bd2d13 227 h3 = H[11];
feb11 0:7a1237bd2d13 228 h4 = H[12];
feb11 0:7a1237bd2d13 229 h5 = H[13];
feb11 0:7a1237bd2d13 230 h6 = H[14];
feb11 0:7a1237bd2d13 231 h7 = H[15];
feb11 0:7a1237bd2d13 232 break;
feb11 0:7a1237bd2d13 233 }
feb11 0:7a1237bd2d13 234 totalBufferLength = 0;
feb11 0:7a1237bd2d13 235 bufferLength = 0;
feb11 0:7a1237bd2d13 236 }
feb11 0:7a1237bd2d13 237
feb11 0:7a1237bd2d13 238 void SHA2_64::computeBlock(uint64_t *h02,
feb11 0:7a1237bd2d13 239 uint64_t *h12,
feb11 0:7a1237bd2d13 240 uint64_t *h22,
feb11 0:7a1237bd2d13 241 uint64_t *h32,
feb11 0:7a1237bd2d13 242 uint64_t *h42,
feb11 0:7a1237bd2d13 243 uint64_t *h52,
feb11 0:7a1237bd2d13 244 uint64_t *h62,
feb11 0:7a1237bd2d13 245 uint64_t *h72,
feb11 0:7a1237bd2d13 246 uint8_t *buffer)
feb11 0:7a1237bd2d13 247 {
feb11 0:7a1237bd2d13 248 uint64_t w[80];
feb11 0:7a1237bd2d13 249 for(int t = 0; t < 16; ++t)
feb11 0:7a1237bd2d13 250 {
feb11 0:7a1237bd2d13 251 memcpy(&w[t], &buffer[t*8], 8);
feb11 0:7a1237bd2d13 252 w[t] = revWord(w[t]);
feb11 0:7a1237bd2d13 253 }
feb11 0:7a1237bd2d13 254 for(int t = 16; t < 80; ++t)
feb11 0:7a1237bd2d13 255 w[t] = SSIG1(w[t-2]) + w[t-7] + SSIG0(w[t-15]) + w[t-16];
feb11 0:7a1237bd2d13 256
feb11 0:7a1237bd2d13 257 uint64_t a = *h02, b = *h12, c = *h22, d = *h32, e = *h42, f = *h52, g = *h62, h = *h72;
feb11 0:7a1237bd2d13 258 for(int t = 0; t < 80; ++t)
feb11 0:7a1237bd2d13 259 {
feb11 0:7a1237bd2d13 260 uint64_t T1 = h + BSIG1(e) + CH(e,f,g) + K[t] + w[t];
feb11 0:7a1237bd2d13 261 uint64_t T2 = BSIG0(a) + MAJ(a,b,c);
feb11 0:7a1237bd2d13 262 h = g;
feb11 0:7a1237bd2d13 263 g = f;
feb11 0:7a1237bd2d13 264 f = e;
feb11 0:7a1237bd2d13 265 e = d + T1;
feb11 0:7a1237bd2d13 266 d = c;
feb11 0:7a1237bd2d13 267 c = b;
feb11 0:7a1237bd2d13 268 b = a;
feb11 0:7a1237bd2d13 269 a = T1 + T2;
feb11 0:7a1237bd2d13 270 }
feb11 0:7a1237bd2d13 271 *h02 += a;
feb11 0:7a1237bd2d13 272 *h12 += b;
feb11 0:7a1237bd2d13 273 *h22 += c;
feb11 0:7a1237bd2d13 274 *h32 += d;
feb11 0:7a1237bd2d13 275 *h42 += e;
feb11 0:7a1237bd2d13 276 *h52 += f;
feb11 0:7a1237bd2d13 277 *h62 += g;
feb11 0:7a1237bd2d13 278 *h72 += h;
feb11 0:7a1237bd2d13 279 }
feb11 0:7a1237bd2d13 280
feb11 0:7a1237bd2d13 281 void SHA2_64::computeDigest(SHA2_64_TYPE type, uint8_t *digest, uint8_t *in, uint32_t length)
feb11 0:7a1237bd2d13 282 {
feb11 0:7a1237bd2d13 283 uint64_t h0 = H[type*8], h1 = H[type*8+1], h2 = H[type*8+2], h3 = H[type*8+3];
feb11 0:7a1237bd2d13 284 uint64_t h4 = H[type*8+4], h5 = H[type*8+5], h6 = H[type*8+6], h7 = H[type*8+7];
feb11 0:7a1237bd2d13 285 int offset = 0;
feb11 0:7a1237bd2d13 286 while(length - offset >= 128)
feb11 0:7a1237bd2d13 287 {
feb11 0:7a1237bd2d13 288 computeBlock(&h0, &h1, &h2, &h3, &h4, &h5, &h6, &h7, &in[offset]);
feb11 0:7a1237bd2d13 289 offset += 128;
feb11 0:7a1237bd2d13 290 }
feb11 0:7a1237bd2d13 291 uint8_t bufferLength = length-offset;
feb11 0:7a1237bd2d13 292 uint8_t buffer[128];
feb11 0:7a1237bd2d13 293 memcpy(buffer, &in[offset],bufferLength);
feb11 0:7a1237bd2d13 294 uint16_t padding;
feb11 0:7a1237bd2d13 295 if(length % 128 < 112)
feb11 0:7a1237bd2d13 296 padding = 112 - (length % 128);
feb11 0:7a1237bd2d13 297 else
feb11 0:7a1237bd2d13 298 padding = 112 + (128 - (length % 128));
feb11 0:7a1237bd2d13 299 buffer[bufferLength] = 0x80;
feb11 0:7a1237bd2d13 300 bufferLength++;
feb11 0:7a1237bd2d13 301 padding--;
feb11 0:7a1237bd2d13 302 while(padding > 0)
feb11 0:7a1237bd2d13 303 {
feb11 0:7a1237bd2d13 304 if(bufferLength == 128)
feb11 0:7a1237bd2d13 305 {
feb11 0:7a1237bd2d13 306 computeBlock(&h0, &h1, &h2, &h3, &h4, &h5, &h6, &h7, buffer);
feb11 0:7a1237bd2d13 307 bufferLength = 0;
feb11 0:7a1237bd2d13 308 }
feb11 0:7a1237bd2d13 309 buffer[bufferLength] = 0;
feb11 0:7a1237bd2d13 310 bufferLength++;
feb11 0:7a1237bd2d13 311 padding--;
feb11 0:7a1237bd2d13 312 }
feb11 0:7a1237bd2d13 313 uint64_t lengthBit = length * 8;
feb11 0:7a1237bd2d13 314 lengthBit = revWord(lengthBit);
feb11 0:7a1237bd2d13 315 memset(&buffer[112], 0, 8);
feb11 0:7a1237bd2d13 316 memcpy(&buffer[120], &lengthBit, 8);
feb11 0:7a1237bd2d13 317 computeBlock(&h0, &h1, &h2, &h3, &h4, &h5, &h6, &h7, buffer);
feb11 0:7a1237bd2d13 318
feb11 0:7a1237bd2d13 319 h0 = revWord(h0);
feb11 0:7a1237bd2d13 320 h1 = revWord(h1);
feb11 0:7a1237bd2d13 321 h2 = revWord(h2);
feb11 0:7a1237bd2d13 322 h3 = revWord(h3);
feb11 0:7a1237bd2d13 323 h4 = revWord(h4);
feb11 0:7a1237bd2d13 324 h5 = revWord(h5);
feb11 0:7a1237bd2d13 325
feb11 0:7a1237bd2d13 326
feb11 0:7a1237bd2d13 327 memcpy(digest, &h0, 8);
feb11 0:7a1237bd2d13 328 memcpy(&digest[8], &h1, 8);
feb11 0:7a1237bd2d13 329 memcpy(&digest[16], &h2, 8);
feb11 0:7a1237bd2d13 330 memcpy(&digest[24], &h3, 8);
feb11 0:7a1237bd2d13 331 memcpy(&digest[32], &h4, 8);
feb11 0:7a1237bd2d13 332 memcpy(&digest[40], &h5, 8);
feb11 0:7a1237bd2d13 333
feb11 0:7a1237bd2d13 334 if(type == SHA_512)
feb11 0:7a1237bd2d13 335 {
feb11 0:7a1237bd2d13 336 h6 = revWord(h6);
feb11 0:7a1237bd2d13 337 h7 = revWord(h7);
feb11 0:7a1237bd2d13 338 memcpy(&digest[48], &h6, 8);
feb11 0:7a1237bd2d13 339 memcpy(&digest[56], &h7, 8);
feb11 0:7a1237bd2d13 340 }
feb11 0:7a1237bd2d13 341 }
feb11 0:7a1237bd2d13 342