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_32.cpp@3:85c6ee25cf3e, 2013-09-11 (annotated)

Committer:
feb11
Date:
Wed Sep 11 17:22:40 2013 +0000
Revision:
3:85c6ee25cf3e
Parent:
2:473bac39ae7c
Child:
4:0da19393bd57
improved speed of MD2, MD5, SHA-1 and SHA-2 (32bits)

Who changed what in which revision?

UserRevisionLine numberNew contents of line
feb11 0:7a1237bd2d13 1 #include "SHA2_32.h"
feb11 0:7a1237bd2d13 2 #include <string.h>
feb11 0:7a1237bd2d13 3 #include <stdio.h>
feb11 0:7a1237bd2d13 4 #include <stdlib.h>
feb11 0:7a1237bd2d13 5
feb11 0:7a1237bd2d13 6 static const uint32_t K[] =
feb11 0:7a1237bd2d13 7 {
feb11 0:7a1237bd2d13 8 0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5,
feb11 0:7a1237bd2d13 9 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
feb11 0:7a1237bd2d13 10 0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3,
feb11 0:7a1237bd2d13 11 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,
feb11 0:7a1237bd2d13 12 0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc,
feb11 0:7a1237bd2d13 13 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
feb11 0:7a1237bd2d13 14 0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7,
feb11 0:7a1237bd2d13 15 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,
feb11 0:7a1237bd2d13 16 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13,
feb11 0:7a1237bd2d13 17 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,
feb11 0:7a1237bd2d13 18 0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3,
feb11 0:7a1237bd2d13 19 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
feb11 0:7a1237bd2d13 20 0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5,
feb11 0:7a1237bd2d13 21 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,
feb11 0:7a1237bd2d13 22 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208,
feb11 0:7a1237bd2d13 23 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2
feb11 0:7a1237bd2d13 24 };
feb11 0:7a1237bd2d13 25
feb11 3:85c6ee25cf3e 26 #define ROTL(W,N) (((W) << (N)) | ((W) >> (32-(N))))
feb11 3:85c6ee25cf3e 27 #define ROTR(W,N) (((W) >> (N)) | ((W) << (32-(N))))
feb11 3:85c6ee25cf3e 28 #define CH(X,Y,Z) (((X) & (Y)) ^ ((~(X)) & (Z)))
feb11 3:85c6ee25cf3e 29 #define MAJ(X,Y,Z) (((X) & (Y)) ^ ((X) & (Z)) ^ ((Y) & (Z)))
feb11 3:85c6ee25cf3e 30 #define BSIG0(X) (ROTR(X,2) ^ ROTR(X,13) ^ ROTR(X,22))
feb11 3:85c6ee25cf3e 31 #define BSIG1(X) (ROTR(X,6) ^ ROTR(X,11) ^ ROTR(X,25))
feb11 3:85c6ee25cf3e 32 #define SSIG0(X) (ROTR((X),7) ^ ROTR((X),18) ^ ((X) >> 3))
feb11 3:85c6ee25cf3e 33 #define SSIG1(X) (ROTR((X),17) ^ ROTR((X),19) ^ ((X) >> 10))
feb11 3:85c6ee25cf3e 34 #define R(A,B,C,D,E,F,G,H,T) T1 = H + BSIG1(E) + CH(E,F,G) + K[T] + w[T]; \
feb11 3:85c6ee25cf3e 35 T2 = BSIG0(A) + MAJ(A,B,C); \
feb11 3:85c6ee25cf3e 36 D += T1; \
feb11 3:85c6ee25cf3e 37 H = T1 + T2;
feb11 3:85c6ee25cf3e 38
feb11 0:7a1237bd2d13 39 static const uint32_t H[] =
feb11 0:7a1237bd2d13 40 {
feb11 0:7a1237bd2d13 41 // SHA-224
feb11 0:7a1237bd2d13 42 0xc1059ed8, 0x367cd507, 0x3070dd17, 0xf70e5939,
feb11 0:7a1237bd2d13 43 0xffc00b31, 0x68581511, 0x64f98fa7, 0xbefa4fa4,
feb11 0:7a1237bd2d13 44
feb11 0:7a1237bd2d13 45 // SHA-256
feb11 0:7a1237bd2d13 46 0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a,
feb11 0:7a1237bd2d13 47 0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19
feb11 0:7a1237bd2d13 48 };
feb11 0:7a1237bd2d13 49
feb11 0:7a1237bd2d13 50 SHA2_32::SHA2_32(SHA_32_TYPE t):
feb11 0:7a1237bd2d13 51 type(t),
feb11 0:7a1237bd2d13 52 totalBufferLength(0),
feb11 0:7a1237bd2d13 53 bufferLength(0)
feb11 0:7a1237bd2d13 54 {
feb11 0:7a1237bd2d13 55 switch(type)
feb11 0:7a1237bd2d13 56 {
feb11 0:7a1237bd2d13 57 case SHA_224:
feb11 0:7a1237bd2d13 58 h0 = H[0];
feb11 0:7a1237bd2d13 59 h1 = H[1];
feb11 0:7a1237bd2d13 60 h2 = H[2];
feb11 0:7a1237bd2d13 61 h3 = H[3];
feb11 0:7a1237bd2d13 62 h4 = H[4];
feb11 0:7a1237bd2d13 63 h5 = H[5];
feb11 0:7a1237bd2d13 64 h6 = H[6];
feb11 0:7a1237bd2d13 65 h7 = H[7];
feb11 0:7a1237bd2d13 66 break;
feb11 0:7a1237bd2d13 67
feb11 0:7a1237bd2d13 68 case SHA_256:
feb11 0:7a1237bd2d13 69 h0 = H[8];
feb11 0:7a1237bd2d13 70 h1 = H[9];
feb11 0:7a1237bd2d13 71 h2 = H[10];
feb11 0:7a1237bd2d13 72 h3 = H[11];
feb11 0:7a1237bd2d13 73 h4 = H[12];
feb11 0:7a1237bd2d13 74 h5 = H[13];
feb11 0:7a1237bd2d13 75 h6 = H[14];
feb11 0:7a1237bd2d13 76 h7 = H[15];
feb11 0:7a1237bd2d13 77 break;
feb11 0:7a1237bd2d13 78 }
feb11 0:7a1237bd2d13 79 }
feb11 0:7a1237bd2d13 80
feb11 0:7a1237bd2d13 81 void SHA2_32::add(uint8_t *in, uint32_t length)
feb11 0:7a1237bd2d13 82 {
feb11 0:7a1237bd2d13 83 if(length < 64-bufferLength)
feb11 0:7a1237bd2d13 84 {
feb11 0:7a1237bd2d13 85 memcpy(&buffer[bufferLength], in, length);
feb11 0:7a1237bd2d13 86 bufferLength += length;
feb11 0:7a1237bd2d13 87 totalBufferLength += length;
feb11 0:7a1237bd2d13 88 return;
feb11 0:7a1237bd2d13 89 }
feb11 0:7a1237bd2d13 90 int offset = 64-bufferLength;
feb11 0:7a1237bd2d13 91 memcpy(&buffer[bufferLength], in, offset);
feb11 0:7a1237bd2d13 92 computeBlock(&h0,&h1,&h2,&h3,&h4,&h5,&h6,&h7,buffer);
feb11 0:7a1237bd2d13 93 while(length-offset > 64)
feb11 0:7a1237bd2d13 94 {
feb11 0:7a1237bd2d13 95 memcpy(buffer, &in[offset], 64);
feb11 0:7a1237bd2d13 96 computeBlock(&h0,&h1,&h2,&h3,&h4,&h5,&h6,&h7,buffer);
feb11 0:7a1237bd2d13 97 offset += 64;
feb11 0:7a1237bd2d13 98 }
feb11 0:7a1237bd2d13 99 if(offset > length)
feb11 0:7a1237bd2d13 100 offset -= 64;
feb11 0:7a1237bd2d13 101 bufferLength = length - offset;
feb11 0:7a1237bd2d13 102 memcpy(buffer, &in[offset], bufferLength);
feb11 0:7a1237bd2d13 103 totalBufferLength += length;
feb11 0:7a1237bd2d13 104 }
feb11 0:7a1237bd2d13 105
feb11 0:7a1237bd2d13 106 void SHA2_32::computeDigest(uint8_t *digest)
feb11 0:7a1237bd2d13 107 {
feb11 0:7a1237bd2d13 108 uint16_t padding;
feb11 0:7a1237bd2d13 109 if(totalBufferLength % 64 < 56)
feb11 0:7a1237bd2d13 110 padding = 56 - (totalBufferLength % 64);
feb11 0:7a1237bd2d13 111 else
feb11 0:7a1237bd2d13 112 padding = 56 + (64 - (totalBufferLength % 64));
feb11 3:85c6ee25cf3e 113
feb11 3:85c6ee25cf3e 114 buffer[bufferLength++] = 0x80;
feb11 3:85c6ee25cf3e 115 padding--;
feb11 3:85c6ee25cf3e 116 if(padding+bufferLength == 56)
feb11 3:85c6ee25cf3e 117 memset(&buffer[bufferLength], 0, padding);
feb11 3:85c6ee25cf3e 118 else
feb11 3:85c6ee25cf3e 119 {
feb11 3:85c6ee25cf3e 120 memset(&buffer[bufferLength], 0, 64-bufferLength);
feb11 3:85c6ee25cf3e 121 computeBlock(&h0, &h1, &h2, &h3, &h4, &h5, &h6, &h7, buffer);
feb11 3:85c6ee25cf3e 122 memset(buffer, 0, bufferLength);
feb11 3:85c6ee25cf3e 123 }
feb11 3:85c6ee25cf3e 124
feb11 3:85c6ee25cf3e 125 uint64_t lengthBit = totalBufferLength << 3;
feb11 0:7a1237bd2d13 126 uint32_t lengthBitLow = lengthBit;
feb11 0:7a1237bd2d13 127 uint32_t lengthBitHigh = lengthBit >> 32;
feb11 3:85c6ee25cf3e 128 lengthBitLow = __rev(lengthBitLow);
feb11 3:85c6ee25cf3e 129 lengthBitHigh = __rev(lengthBitHigh);
feb11 3:85c6ee25cf3e 130 memcpy(&buffer[60], &lengthBitLow, 4);
feb11 3:85c6ee25cf3e 131 memcpy(&buffer[56], &lengthBitHigh, 4);
feb11 3:85c6ee25cf3e 132 computeBlock(&h0, &h1, &h2, &h3, &h4, &h5, &h6, &h7, buffer);
feb11 0:7a1237bd2d13 133
feb11 3:85c6ee25cf3e 134 h0 = __rev(h0);
feb11 3:85c6ee25cf3e 135 h1 = __rev(h1);
feb11 3:85c6ee25cf3e 136 h2 = __rev(h2);
feb11 3:85c6ee25cf3e 137 h3 = __rev(h3);
feb11 3:85c6ee25cf3e 138 h4 = __rev(h4);
feb11 3:85c6ee25cf3e 139 h5 = __rev(h5);
feb11 3:85c6ee25cf3e 140 h6 = __rev(h6);
feb11 3:85c6ee25cf3e 141 memcpy(digest, &h0, 4);
feb11 3:85c6ee25cf3e 142 memcpy(&digest[4], &h1, 4);
feb11 3:85c6ee25cf3e 143 memcpy(&digest[8], &h2, 4);
feb11 3:85c6ee25cf3e 144 memcpy(&digest[12], &h3, 4);
feb11 3:85c6ee25cf3e 145 memcpy(&digest[16], &h4, 4);
feb11 3:85c6ee25cf3e 146 memcpy(&digest[20], &h5, 4);
feb11 3:85c6ee25cf3e 147 memcpy(&digest[24], &h6, 4);
feb11 3:85c6ee25cf3e 148
feb11 0:7a1237bd2d13 149 if(type == SHA_256)
feb11 0:7a1237bd2d13 150 {
feb11 3:85c6ee25cf3e 151 h7 = __rev(h7);
feb11 3:85c6ee25cf3e 152 memcpy(&digest[28], &h7, 4);
feb11 0:7a1237bd2d13 153 }
feb11 0:7a1237bd2d13 154
feb11 0:7a1237bd2d13 155 // reset state
feb11 0:7a1237bd2d13 156 switch(type)
feb11 0:7a1237bd2d13 157 {
feb11 0:7a1237bd2d13 158 case SHA_224:
feb11 0:7a1237bd2d13 159 h0 = H[0];
feb11 0:7a1237bd2d13 160 h1 = H[1];
feb11 0:7a1237bd2d13 161 h2 = H[2];
feb11 0:7a1237bd2d13 162 h3 = H[3];
feb11 0:7a1237bd2d13 163 h4 = H[4];
feb11 0:7a1237bd2d13 164 h5 = H[5];
feb11 0:7a1237bd2d13 165 h6 = H[6];
feb11 0:7a1237bd2d13 166 h7 = H[7];
feb11 0:7a1237bd2d13 167 break;
feb11 0:7a1237bd2d13 168
feb11 0:7a1237bd2d13 169 case SHA_256:
feb11 0:7a1237bd2d13 170 h0 = H[8];
feb11 0:7a1237bd2d13 171 h1 = H[9];
feb11 0:7a1237bd2d13 172 h2 = H[10];
feb11 0:7a1237bd2d13 173 h3 = H[11];
feb11 0:7a1237bd2d13 174 h4 = H[12];
feb11 0:7a1237bd2d13 175 h5 = H[13];
feb11 0:7a1237bd2d13 176 h6 = H[14];
feb11 0:7a1237bd2d13 177 h7 = H[15];
feb11 0:7a1237bd2d13 178 break;
feb11 0:7a1237bd2d13 179 }
feb11 0:7a1237bd2d13 180 totalBufferLength = 0;
feb11 0:7a1237bd2d13 181 bufferLength = 0;
feb11 0:7a1237bd2d13 182 }
feb11 0:7a1237bd2d13 183
feb11 0:7a1237bd2d13 184 void SHA2_32::computeBlock(uint32_t *h02,
feb11 0:7a1237bd2d13 185 uint32_t *h12,
feb11 0:7a1237bd2d13 186 uint32_t *h22,
feb11 0:7a1237bd2d13 187 uint32_t *h32,
feb11 0:7a1237bd2d13 188 uint32_t *h42,
feb11 0:7a1237bd2d13 189 uint32_t *h52,
feb11 0:7a1237bd2d13 190 uint32_t *h62,
feb11 0:7a1237bd2d13 191 uint32_t *h72,
feb11 0:7a1237bd2d13 192 uint8_t *buffer)
feb11 0:7a1237bd2d13 193 {
feb11 0:7a1237bd2d13 194 uint32_t w[64];
feb11 3:85c6ee25cf3e 195 uint32_t *buffer2 = (uint32_t*)buffer;
feb11 3:85c6ee25cf3e 196 w[0] = __rev(buffer2[0]);
feb11 3:85c6ee25cf3e 197 w[1] = __rev(buffer2[1]);
feb11 3:85c6ee25cf3e 198 w[2] = __rev(buffer2[2]);
feb11 3:85c6ee25cf3e 199 w[3] = __rev(buffer2[3]);
feb11 3:85c6ee25cf3e 200 w[4] = __rev(buffer2[4]);
feb11 3:85c6ee25cf3e 201 w[5] = __rev(buffer2[5]);
feb11 3:85c6ee25cf3e 202 w[6] = __rev(buffer2[6]);
feb11 3:85c6ee25cf3e 203 w[7] = __rev(buffer2[7]);
feb11 3:85c6ee25cf3e 204 w[8] = __rev(buffer2[8]);
feb11 3:85c6ee25cf3e 205 w[9] = __rev(buffer2[9]);
feb11 3:85c6ee25cf3e 206 w[10] = __rev(buffer2[10]);
feb11 3:85c6ee25cf3e 207 w[11] = __rev(buffer2[11]);
feb11 3:85c6ee25cf3e 208 w[12] = __rev(buffer2[12]);
feb11 3:85c6ee25cf3e 209 w[13] = __rev(buffer2[13]);
feb11 3:85c6ee25cf3e 210 w[14] = __rev(buffer2[14]);
feb11 3:85c6ee25cf3e 211 w[15] = __rev(buffer2[15]);
feb11 3:85c6ee25cf3e 212
feb11 0:7a1237bd2d13 213 for(int t = 16; t < 64; ++t)
feb11 0:7a1237bd2d13 214 w[t] = SSIG1(w[t-2]) + w[t-7] + SSIG0(w[t-15]) + w[t-16];
feb11 0:7a1237bd2d13 215
feb11 3:85c6ee25cf3e 216 uint32_t a = *h02, b = *h12, c = *h22, d = *h32, e = *h42, f = *h52, g = *h62, h = *h72;
feb11 3:85c6ee25cf3e 217 uint32_t T1, T2;
feb11 3:85c6ee25cf3e 218
feb11 3:85c6ee25cf3e 219 R(a,b,c,d,e,f,g,h,0)
feb11 3:85c6ee25cf3e 220 R(h,a,b,c,d,e,f,g,1)
feb11 3:85c6ee25cf3e 221 R(g,h,a,b,c,d,e,f,2)
feb11 3:85c6ee25cf3e 222 R(f,g,h,a,b,c,d,e,3)
feb11 3:85c6ee25cf3e 223 R(e,f,g,h,a,b,c,d,4)
feb11 3:85c6ee25cf3e 224 R(d,e,f,g,h,a,b,c,5)
feb11 3:85c6ee25cf3e 225 R(c,d,e,f,g,h,a,b,6)
feb11 3:85c6ee25cf3e 226 R(b,c,d,e,f,g,h,a,7)
feb11 3:85c6ee25cf3e 227
feb11 3:85c6ee25cf3e 228 R(a,b,c,d,e,f,g,h,8)
feb11 3:85c6ee25cf3e 229 R(h,a,b,c,d,e,f,g,9)
feb11 3:85c6ee25cf3e 230 R(g,h,a,b,c,d,e,f,10)
feb11 3:85c6ee25cf3e 231 R(f,g,h,a,b,c,d,e,11)
feb11 3:85c6ee25cf3e 232 R(e,f,g,h,a,b,c,d,12)
feb11 3:85c6ee25cf3e 233 R(d,e,f,g,h,a,b,c,13)
feb11 3:85c6ee25cf3e 234 R(c,d,e,f,g,h,a,b,14)
feb11 3:85c6ee25cf3e 235 R(b,c,d,e,f,g,h,a,15)
feb11 3:85c6ee25cf3e 236
feb11 3:85c6ee25cf3e 237 R(a,b,c,d,e,f,g,h,16)
feb11 3:85c6ee25cf3e 238 R(h,a,b,c,d,e,f,g,17)
feb11 3:85c6ee25cf3e 239 R(g,h,a,b,c,d,e,f,18)
feb11 3:85c6ee25cf3e 240 R(f,g,h,a,b,c,d,e,19)
feb11 3:85c6ee25cf3e 241 R(e,f,g,h,a,b,c,d,20)
feb11 3:85c6ee25cf3e 242 R(d,e,f,g,h,a,b,c,21)
feb11 3:85c6ee25cf3e 243 R(c,d,e,f,g,h,a,b,22)
feb11 3:85c6ee25cf3e 244 R(b,c,d,e,f,g,h,a,23)
feb11 3:85c6ee25cf3e 245
feb11 3:85c6ee25cf3e 246 R(a,b,c,d,e,f,g,h,24)
feb11 3:85c6ee25cf3e 247 R(h,a,b,c,d,e,f,g,25)
feb11 3:85c6ee25cf3e 248 R(g,h,a,b,c,d,e,f,26)
feb11 3:85c6ee25cf3e 249 R(f,g,h,a,b,c,d,e,27)
feb11 3:85c6ee25cf3e 250 R(e,f,g,h,a,b,c,d,28)
feb11 3:85c6ee25cf3e 251 R(d,e,f,g,h,a,b,c,29)
feb11 3:85c6ee25cf3e 252 R(c,d,e,f,g,h,a,b,30)
feb11 3:85c6ee25cf3e 253 R(b,c,d,e,f,g,h,a,31)
feb11 3:85c6ee25cf3e 254
feb11 3:85c6ee25cf3e 255 R(a,b,c,d,e,f,g,h,32)
feb11 3:85c6ee25cf3e 256 R(h,a,b,c,d,e,f,g,33)
feb11 3:85c6ee25cf3e 257 R(g,h,a,b,c,d,e,f,34)
feb11 3:85c6ee25cf3e 258 R(f,g,h,a,b,c,d,e,35)
feb11 3:85c6ee25cf3e 259 R(e,f,g,h,a,b,c,d,36)
feb11 3:85c6ee25cf3e 260 R(d,e,f,g,h,a,b,c,37)
feb11 3:85c6ee25cf3e 261 R(c,d,e,f,g,h,a,b,38)
feb11 3:85c6ee25cf3e 262 R(b,c,d,e,f,g,h,a,39)
feb11 3:85c6ee25cf3e 263
feb11 3:85c6ee25cf3e 264 R(a,b,c,d,e,f,g,h,40)
feb11 3:85c6ee25cf3e 265 R(h,a,b,c,d,e,f,g,41)
feb11 3:85c6ee25cf3e 266 R(g,h,a,b,c,d,e,f,42)
feb11 3:85c6ee25cf3e 267 R(f,g,h,a,b,c,d,e,43)
feb11 3:85c6ee25cf3e 268 R(e,f,g,h,a,b,c,d,44)
feb11 3:85c6ee25cf3e 269 R(d,e,f,g,h,a,b,c,45)
feb11 3:85c6ee25cf3e 270 R(c,d,e,f,g,h,a,b,46)
feb11 3:85c6ee25cf3e 271 R(b,c,d,e,f,g,h,a,47)
feb11 3:85c6ee25cf3e 272
feb11 3:85c6ee25cf3e 273 R(a,b,c,d,e,f,g,h,48)
feb11 3:85c6ee25cf3e 274 R(h,a,b,c,d,e,f,g,49)
feb11 3:85c6ee25cf3e 275 R(g,h,a,b,c,d,e,f,50)
feb11 3:85c6ee25cf3e 276 R(f,g,h,a,b,c,d,e,51)
feb11 3:85c6ee25cf3e 277 R(e,f,g,h,a,b,c,d,52)
feb11 3:85c6ee25cf3e 278 R(d,e,f,g,h,a,b,c,53)
feb11 3:85c6ee25cf3e 279 R(c,d,e,f,g,h,a,b,54)
feb11 3:85c6ee25cf3e 280 R(b,c,d,e,f,g,h,a,55)
feb11 3:85c6ee25cf3e 281
feb11 3:85c6ee25cf3e 282 R(a,b,c,d,e,f,g,h,56)
feb11 3:85c6ee25cf3e 283 R(h,a,b,c,d,e,f,g,57)
feb11 3:85c6ee25cf3e 284 R(g,h,a,b,c,d,e,f,58)
feb11 3:85c6ee25cf3e 285 R(f,g,h,a,b,c,d,e,59)
feb11 3:85c6ee25cf3e 286 R(e,f,g,h,a,b,c,d,60)
feb11 3:85c6ee25cf3e 287 R(d,e,f,g,h,a,b,c,61)
feb11 3:85c6ee25cf3e 288 R(c,d,e,f,g,h,a,b,62)
feb11 3:85c6ee25cf3e 289 R(b,c,d,e,f,g,h,a,63)
feb11 3:85c6ee25cf3e 290
feb11 0:7a1237bd2d13 291
feb11 0:7a1237bd2d13 292 *h02 += a;
feb11 0:7a1237bd2d13 293 *h12 += b;
feb11 0:7a1237bd2d13 294 *h22 += c;
feb11 0:7a1237bd2d13 295 *h32 += d;
feb11 0:7a1237bd2d13 296 *h42 += e;
feb11 0:7a1237bd2d13 297 *h52 += f;
feb11 0:7a1237bd2d13 298 *h62 += g;
feb11 0:7a1237bd2d13 299 *h72 += h;
feb11 0:7a1237bd2d13 300 }
feb11 0:7a1237bd2d13 301
feb11 0:7a1237bd2d13 302 void SHA2_32::computeDigest(SHA_32_TYPE type, uint8_t *digest, uint8_t *in, uint32_t length)
feb11 0:7a1237bd2d13 303 {
feb11 0:7a1237bd2d13 304 uint32_t h0 = H[type*8], h1 = H[type*8+1], h2 = H[type*8+2], h3 = H[type*8+3];
feb11 0:7a1237bd2d13 305 uint32_t h4 = H[type*8+4], h5 = H[type*8+5], h6 = H[type*8+6], h7 = H[type*8+7];
feb11 3:85c6ee25cf3e 306 uint64_t lengthBit = length << 3;
feb11 0:7a1237bd2d13 307 uint16_t padding;
feb11 0:7a1237bd2d13 308 if(length % 64 < 56)
feb11 0:7a1237bd2d13 309 padding = 56 - (length % 64);
feb11 0:7a1237bd2d13 310 else
feb11 0:7a1237bd2d13 311 padding = 56 + (64 - (length % 64));
feb11 3:85c6ee25cf3e 312
feb11 3:85c6ee25cf3e 313 while(length >= 64)
feb11 0:7a1237bd2d13 314 {
feb11 3:85c6ee25cf3e 315 computeBlock(&h0, &h1, &h2, &h3, &h4, &h5, &h6, &h7, in);
feb11 3:85c6ee25cf3e 316 length -= 64;
feb11 3:85c6ee25cf3e 317 in += 64;
feb11 0:7a1237bd2d13 318 }
feb11 3:85c6ee25cf3e 319 uint8_t buffer[64];
feb11 3:85c6ee25cf3e 320 memcpy(buffer, in,length);
feb11 3:85c6ee25cf3e 321 buffer[length++] = 0x80;
feb11 3:85c6ee25cf3e 322 padding--;
feb11 3:85c6ee25cf3e 323 if(padding+length == 56)
feb11 3:85c6ee25cf3e 324 memset(&buffer[length], 0, padding);
feb11 3:85c6ee25cf3e 325 else
feb11 3:85c6ee25cf3e 326 {
feb11 3:85c6ee25cf3e 327 memset(&buffer[length], 0, 64-length);
feb11 3:85c6ee25cf3e 328 computeBlock(&h0, &h1, &h2, &h3, &h4, &h5, &h6, &h7, buffer);
feb11 3:85c6ee25cf3e 329 memset(buffer, 0, length);
feb11 3:85c6ee25cf3e 330 }
feb11 3:85c6ee25cf3e 331
feb11 0:7a1237bd2d13 332 uint32_t lengthBitLow = lengthBit;
feb11 0:7a1237bd2d13 333 uint32_t lengthBitHigh = lengthBit >> 32;
feb11 2:473bac39ae7c 334 lengthBitLow = __rev(lengthBitLow);
feb11 2:473bac39ae7c 335 memcpy(&buffer[60], &lengthBitLow, 4);
feb11 2:473bac39ae7c 336 lengthBitHigh = __rev(lengthBitHigh);
feb11 2:473bac39ae7c 337 memcpy(&buffer[56], &lengthBitHigh, 4);
feb11 0:7a1237bd2d13 338 computeBlock(&h0, &h1, &h2, &h3, &h4, &h5, &h6, &h7, buffer);
feb11 0:7a1237bd2d13 339
feb11 2:473bac39ae7c 340 h0 = __rev(h0);
feb11 2:473bac39ae7c 341 h1 = __rev(h1);
feb11 2:473bac39ae7c 342 h2 = __rev(h2);
feb11 2:473bac39ae7c 343 h3 = __rev(h3);
feb11 2:473bac39ae7c 344 h4 = __rev(h4);
feb11 2:473bac39ae7c 345 h5 = __rev(h5);
feb11 2:473bac39ae7c 346 h6 = __rev(h6);
feb11 2:473bac39ae7c 347
feb11 2:473bac39ae7c 348 memcpy(digest, &h0, 4);
feb11 2:473bac39ae7c 349 memcpy(&digest[4], &h1, 4);
feb11 2:473bac39ae7c 350 memcpy(&digest[8], &h2, 4);
feb11 2:473bac39ae7c 351 memcpy(&digest[12], &h3, 4);
feb11 2:473bac39ae7c 352 memcpy(&digest[16], &h4, 4);
feb11 2:473bac39ae7c 353 memcpy(&digest[20], &h5, 4);
feb11 2:473bac39ae7c 354 memcpy(&digest[24], &h6, 4);
feb11 2:473bac39ae7c 355
feb11 0:7a1237bd2d13 356
feb11 0:7a1237bd2d13 357 if(type == SHA_256)
feb11 0:7a1237bd2d13 358 {
feb11 2:473bac39ae7c 359 h7 = __rev(h7);
feb11 2:473bac39ae7c 360 memcpy(&digest[28], &h7, 4);
feb11 0:7a1237bd2d13 361 }
feb11 0:7a1237bd2d13 362 }