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@5:06cd9c8afa0b, 2013-09-12 (annotated)

Committer:
feb11
Date:
Thu Sep 12 15:08:51 2013 +0000
Revision:
5:06cd9c8afa0b
Parent:
4:0da19393bd57
Child:
6:19aa835f2bbb
change API & small improvements in SHA-2

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 4:0da19393bd57 6
feb11 4:0da19393bd57 7 static const uint8_t MASK = 0x0F;
feb11 4:0da19393bd57 8 #define W(t) (w[(t)] = SSIG1(w[((t)+14)&MASK]) + w[((t)+9)&MASK] + SSIG0(w[((t)+1)&MASK]) + w[t])
feb11 0:7a1237bd2d13 9
feb11 3:85c6ee25cf3e 10 #define ROTL(W,N) (((W) << (N)) | ((W) >> (32-(N))))
feb11 3:85c6ee25cf3e 11 #define ROTR(W,N) (((W) >> (N)) | ((W) << (32-(N))))
feb11 3:85c6ee25cf3e 12 #define CH(X,Y,Z) (((X) & (Y)) ^ ((~(X)) & (Z)))
feb11 3:85c6ee25cf3e 13 #define MAJ(X,Y,Z) (((X) & (Y)) ^ ((X) & (Z)) ^ ((Y) & (Z)))
feb11 3:85c6ee25cf3e 14 #define BSIG0(X) (ROTR(X,2) ^ ROTR(X,13) ^ ROTR(X,22))
feb11 3:85c6ee25cf3e 15 #define BSIG1(X) (ROTR(X,6) ^ ROTR(X,11) ^ ROTR(X,25))
feb11 3:85c6ee25cf3e 16 #define SSIG0(X) (ROTR((X),7) ^ ROTR((X),18) ^ ((X) >> 3))
feb11 3:85c6ee25cf3e 17 #define SSIG1(X) (ROTR((X),17) ^ ROTR((X),19) ^ ((X) >> 10))
feb11 4:0da19393bd57 18 #define R(A,B,C,D,E,F,G,H,T,K) T1 = H + BSIG1(E) + CH(E,F,G) + K + (w[T] = __rev(buffer2[T])); \
feb11 4:0da19393bd57 19 T2 = BSIG0(A) + MAJ(A,B,C); \
feb11 4:0da19393bd57 20 D += T1; \
feb11 4:0da19393bd57 21 H = T1 + T2;
feb11 4:0da19393bd57 22 #define R2(A,B,C,D,E,F,G,H,T,K) T1 = H + BSIG1(E) + CH(E,F,G) + K + W(T&MASK); \
feb11 3:85c6ee25cf3e 23 T2 = BSIG0(A) + MAJ(A,B,C); \
feb11 3:85c6ee25cf3e 24 D += T1; \
feb11 3:85c6ee25cf3e 25 H = T1 + T2;
feb11 3:85c6ee25cf3e 26
feb11 0:7a1237bd2d13 27 static const uint32_t H[] =
feb11 0:7a1237bd2d13 28 {
feb11 0:7a1237bd2d13 29 // SHA-224
feb11 0:7a1237bd2d13 30 0xc1059ed8, 0x367cd507, 0x3070dd17, 0xf70e5939,
feb11 0:7a1237bd2d13 31 0xffc00b31, 0x68581511, 0x64f98fa7, 0xbefa4fa4,
feb11 0:7a1237bd2d13 32
feb11 0:7a1237bd2d13 33 // SHA-256
feb11 0:7a1237bd2d13 34 0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a,
feb11 0:7a1237bd2d13 35 0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19
feb11 0:7a1237bd2d13 36 };
feb11 0:7a1237bd2d13 37
feb11 0:7a1237bd2d13 38 SHA2_32::SHA2_32(SHA_32_TYPE t):
feb11 0:7a1237bd2d13 39 type(t),
feb11 0:7a1237bd2d13 40 totalBufferLength(0),
feb11 0:7a1237bd2d13 41 bufferLength(0)
feb11 0:7a1237bd2d13 42 {
feb11 0:7a1237bd2d13 43 switch(type)
feb11 0:7a1237bd2d13 44 {
feb11 0:7a1237bd2d13 45 case SHA_224:
feb11 0:7a1237bd2d13 46 h0 = H[0];
feb11 0:7a1237bd2d13 47 h1 = H[1];
feb11 0:7a1237bd2d13 48 h2 = H[2];
feb11 0:7a1237bd2d13 49 h3 = H[3];
feb11 0:7a1237bd2d13 50 h4 = H[4];
feb11 0:7a1237bd2d13 51 h5 = H[5];
feb11 0:7a1237bd2d13 52 h6 = H[6];
feb11 0:7a1237bd2d13 53 h7 = H[7];
feb11 0:7a1237bd2d13 54 break;
feb11 0:7a1237bd2d13 55
feb11 0:7a1237bd2d13 56 case SHA_256:
feb11 0:7a1237bd2d13 57 h0 = H[8];
feb11 0:7a1237bd2d13 58 h1 = H[9];
feb11 0:7a1237bd2d13 59 h2 = H[10];
feb11 0:7a1237bd2d13 60 h3 = H[11];
feb11 0:7a1237bd2d13 61 h4 = H[12];
feb11 0:7a1237bd2d13 62 h5 = H[13];
feb11 0:7a1237bd2d13 63 h6 = H[14];
feb11 0:7a1237bd2d13 64 h7 = H[15];
feb11 0:7a1237bd2d13 65 break;
feb11 0:7a1237bd2d13 66 }
feb11 0:7a1237bd2d13 67 }
feb11 0:7a1237bd2d13 68
feb11 5:06cd9c8afa0b 69 void SHA2_32::update(uint8_t *in, uint32_t length)
feb11 0:7a1237bd2d13 70 {
feb11 0:7a1237bd2d13 71 if(length < 64-bufferLength)
feb11 0:7a1237bd2d13 72 {
feb11 0:7a1237bd2d13 73 memcpy(&buffer[bufferLength], in, length);
feb11 0:7a1237bd2d13 74 bufferLength += length;
feb11 0:7a1237bd2d13 75 totalBufferLength += length;
feb11 0:7a1237bd2d13 76 return;
feb11 0:7a1237bd2d13 77 }
feb11 0:7a1237bd2d13 78 int offset = 64-bufferLength;
feb11 0:7a1237bd2d13 79 memcpy(&buffer[bufferLength], in, offset);
feb11 0:7a1237bd2d13 80 computeBlock(&h0,&h1,&h2,&h3,&h4,&h5,&h6,&h7,buffer);
feb11 0:7a1237bd2d13 81 while(length-offset > 64)
feb11 0:7a1237bd2d13 82 {
feb11 0:7a1237bd2d13 83 memcpy(buffer, &in[offset], 64);
feb11 0:7a1237bd2d13 84 computeBlock(&h0,&h1,&h2,&h3,&h4,&h5,&h6,&h7,buffer);
feb11 0:7a1237bd2d13 85 offset += 64;
feb11 0:7a1237bd2d13 86 }
feb11 0:7a1237bd2d13 87 if(offset > length)
feb11 0:7a1237bd2d13 88 offset -= 64;
feb11 0:7a1237bd2d13 89 bufferLength = length - offset;
feb11 0:7a1237bd2d13 90 memcpy(buffer, &in[offset], bufferLength);
feb11 0:7a1237bd2d13 91 totalBufferLength += length;
feb11 0:7a1237bd2d13 92 }
feb11 0:7a1237bd2d13 93
feb11 5:06cd9c8afa0b 94 void SHA2_32::finalize(uint8_t *digest)
feb11 0:7a1237bd2d13 95 {
feb11 0:7a1237bd2d13 96 uint16_t padding;
feb11 0:7a1237bd2d13 97 if(totalBufferLength % 64 < 56)
feb11 0:7a1237bd2d13 98 padding = 56 - (totalBufferLength % 64);
feb11 0:7a1237bd2d13 99 else
feb11 0:7a1237bd2d13 100 padding = 56 + (64 - (totalBufferLength % 64));
feb11 3:85c6ee25cf3e 101
feb11 3:85c6ee25cf3e 102 buffer[bufferLength++] = 0x80;
feb11 3:85c6ee25cf3e 103 padding--;
feb11 3:85c6ee25cf3e 104 if(padding+bufferLength == 56)
feb11 3:85c6ee25cf3e 105 memset(&buffer[bufferLength], 0, padding);
feb11 3:85c6ee25cf3e 106 else
feb11 3:85c6ee25cf3e 107 {
feb11 3:85c6ee25cf3e 108 memset(&buffer[bufferLength], 0, 64-bufferLength);
feb11 3:85c6ee25cf3e 109 computeBlock(&h0, &h1, &h2, &h3, &h4, &h5, &h6, &h7, buffer);
feb11 5:06cd9c8afa0b 110 memset(buffer, 0, 56);
feb11 3:85c6ee25cf3e 111 }
feb11 3:85c6ee25cf3e 112
feb11 3:85c6ee25cf3e 113 uint64_t lengthBit = totalBufferLength << 3;
feb11 0:7a1237bd2d13 114 uint32_t lengthBitLow = lengthBit;
feb11 0:7a1237bd2d13 115 uint32_t lengthBitHigh = lengthBit >> 32;
feb11 3:85c6ee25cf3e 116 lengthBitLow = __rev(lengthBitLow);
feb11 3:85c6ee25cf3e 117 lengthBitHigh = __rev(lengthBitHigh);
feb11 3:85c6ee25cf3e 118 memcpy(&buffer[60], &lengthBitLow, 4);
feb11 3:85c6ee25cf3e 119 memcpy(&buffer[56], &lengthBitHigh, 4);
feb11 3:85c6ee25cf3e 120 computeBlock(&h0, &h1, &h2, &h3, &h4, &h5, &h6, &h7, buffer);
feb11 0:7a1237bd2d13 121
feb11 3:85c6ee25cf3e 122 h0 = __rev(h0);
feb11 3:85c6ee25cf3e 123 h1 = __rev(h1);
feb11 3:85c6ee25cf3e 124 h2 = __rev(h2);
feb11 3:85c6ee25cf3e 125 h3 = __rev(h3);
feb11 3:85c6ee25cf3e 126 h4 = __rev(h4);
feb11 3:85c6ee25cf3e 127 h5 = __rev(h5);
feb11 3:85c6ee25cf3e 128 h6 = __rev(h6);
feb11 3:85c6ee25cf3e 129 memcpy(digest, &h0, 4);
feb11 3:85c6ee25cf3e 130 memcpy(&digest[4], &h1, 4);
feb11 3:85c6ee25cf3e 131 memcpy(&digest[8], &h2, 4);
feb11 3:85c6ee25cf3e 132 memcpy(&digest[12], &h3, 4);
feb11 3:85c6ee25cf3e 133 memcpy(&digest[16], &h4, 4);
feb11 3:85c6ee25cf3e 134 memcpy(&digest[20], &h5, 4);
feb11 3:85c6ee25cf3e 135 memcpy(&digest[24], &h6, 4);
feb11 3:85c6ee25cf3e 136
feb11 0:7a1237bd2d13 137 if(type == SHA_256)
feb11 0:7a1237bd2d13 138 {
feb11 3:85c6ee25cf3e 139 h7 = __rev(h7);
feb11 3:85c6ee25cf3e 140 memcpy(&digest[28], &h7, 4);
feb11 0:7a1237bd2d13 141 }
feb11 0:7a1237bd2d13 142
feb11 0:7a1237bd2d13 143 // reset state
feb11 0:7a1237bd2d13 144 switch(type)
feb11 0:7a1237bd2d13 145 {
feb11 0:7a1237bd2d13 146 case SHA_224:
feb11 0:7a1237bd2d13 147 h0 = H[0];
feb11 0:7a1237bd2d13 148 h1 = H[1];
feb11 0:7a1237bd2d13 149 h2 = H[2];
feb11 0:7a1237bd2d13 150 h3 = H[3];
feb11 0:7a1237bd2d13 151 h4 = H[4];
feb11 0:7a1237bd2d13 152 h5 = H[5];
feb11 0:7a1237bd2d13 153 h6 = H[6];
feb11 0:7a1237bd2d13 154 h7 = H[7];
feb11 0:7a1237bd2d13 155 break;
feb11 0:7a1237bd2d13 156
feb11 0:7a1237bd2d13 157 case SHA_256:
feb11 0:7a1237bd2d13 158 h0 = H[8];
feb11 0:7a1237bd2d13 159 h1 = H[9];
feb11 0:7a1237bd2d13 160 h2 = H[10];
feb11 0:7a1237bd2d13 161 h3 = H[11];
feb11 0:7a1237bd2d13 162 h4 = H[12];
feb11 0:7a1237bd2d13 163 h5 = H[13];
feb11 0:7a1237bd2d13 164 h6 = H[14];
feb11 0:7a1237bd2d13 165 h7 = H[15];
feb11 0:7a1237bd2d13 166 break;
feb11 0:7a1237bd2d13 167 }
feb11 0:7a1237bd2d13 168 totalBufferLength = 0;
feb11 0:7a1237bd2d13 169 bufferLength = 0;
feb11 0:7a1237bd2d13 170 }
feb11 0:7a1237bd2d13 171
feb11 0:7a1237bd2d13 172 void SHA2_32::computeBlock(uint32_t *h02,
feb11 0:7a1237bd2d13 173 uint32_t *h12,
feb11 0:7a1237bd2d13 174 uint32_t *h22,
feb11 0:7a1237bd2d13 175 uint32_t *h32,
feb11 0:7a1237bd2d13 176 uint32_t *h42,
feb11 0:7a1237bd2d13 177 uint32_t *h52,
feb11 0:7a1237bd2d13 178 uint32_t *h62,
feb11 0:7a1237bd2d13 179 uint32_t *h72,
feb11 0:7a1237bd2d13 180 uint8_t *buffer)
feb11 0:7a1237bd2d13 181 {
feb11 4:0da19393bd57 182 uint32_t w[16];
feb11 3:85c6ee25cf3e 183 uint32_t *buffer2 = (uint32_t*)buffer;
feb11 3:85c6ee25cf3e 184 uint32_t a = *h02, b = *h12, c = *h22, d = *h32, e = *h42, f = *h52, g = *h62, h = *h72;
feb11 3:85c6ee25cf3e 185 uint32_t T1, T2;
feb11 4:0da19393bd57 186
feb11 4:0da19393bd57 187
feb11 4:0da19393bd57 188 R(a,b,c,d,e,f,g,h,0,0x428a2f98)
feb11 4:0da19393bd57 189 R(h,a,b,c,d,e,f,g,1,0x71374491)
feb11 4:0da19393bd57 190 R(g,h,a,b,c,d,e,f,2,0xb5c0fbcf)
feb11 4:0da19393bd57 191 R(f,g,h,a,b,c,d,e,3,0xe9b5dba5)
feb11 4:0da19393bd57 192 R(e,f,g,h,a,b,c,d,4,0x3956c25b)
feb11 4:0da19393bd57 193 R(d,e,f,g,h,a,b,c,5,0x59f111f1)
feb11 4:0da19393bd57 194 R(c,d,e,f,g,h,a,b,6,0x923f82a4)
feb11 4:0da19393bd57 195 R(b,c,d,e,f,g,h,a,7,0xab1c5ed5)
feb11 3:85c6ee25cf3e 196
feb11 4:0da19393bd57 197 R(a,b,c,d,e,f,g,h,8,0xd807aa98)
feb11 4:0da19393bd57 198 R(h,a,b,c,d,e,f,g,9,0x12835b01)
feb11 4:0da19393bd57 199 R(g,h,a,b,c,d,e,f,10,0x243185be)
feb11 4:0da19393bd57 200 R(f,g,h,a,b,c,d,e,11,0x550c7dc3)
feb11 4:0da19393bd57 201 R(e,f,g,h,a,b,c,d,12,0x72be5d74)
feb11 4:0da19393bd57 202 R(d,e,f,g,h,a,b,c,13,0x80deb1fe)
feb11 4:0da19393bd57 203 R(c,d,e,f,g,h,a,b,14,0x9bdc06a7)
feb11 4:0da19393bd57 204 R(b,c,d,e,f,g,h,a,15,0xc19bf174)
feb11 4:0da19393bd57 205
feb11 4:0da19393bd57 206 R2(a,b,c,d,e,f,g,h,16,0xe49b69c1)
feb11 4:0da19393bd57 207 R2(h,a,b,c,d,e,f,g,17,0xefbe4786)
feb11 4:0da19393bd57 208 R2(g,h,a,b,c,d,e,f,18,0x0fc19dc6)
feb11 4:0da19393bd57 209 R2(f,g,h,a,b,c,d,e,19,0x240ca1cc)
feb11 4:0da19393bd57 210 R2(e,f,g,h,a,b,c,d,20,0x2de92c6f)
feb11 4:0da19393bd57 211 R2(d,e,f,g,h,a,b,c,21,0x4a7484aa)
feb11 4:0da19393bd57 212 R2(c,d,e,f,g,h,a,b,22,0x5cb0a9dc)
feb11 4:0da19393bd57 213 R2(b,c,d,e,f,g,h,a,23,0x76f988da)
feb11 3:85c6ee25cf3e 214
feb11 4:0da19393bd57 215 R2(a,b,c,d,e,f,g,h,24,0x983e5152)
feb11 4:0da19393bd57 216 R2(h,a,b,c,d,e,f,g,25,0xa831c66d)
feb11 4:0da19393bd57 217 R2(g,h,a,b,c,d,e,f,26,0xb00327c8)
feb11 4:0da19393bd57 218 R2(f,g,h,a,b,c,d,e,27,0xbf597fc7)
feb11 4:0da19393bd57 219 R2(e,f,g,h,a,b,c,d,28,0xc6e00bf3)
feb11 4:0da19393bd57 220 R2(d,e,f,g,h,a,b,c,29,0xd5a79147)
feb11 4:0da19393bd57 221 R2(c,d,e,f,g,h,a,b,30,0x06ca6351)
feb11 4:0da19393bd57 222 R2(b,c,d,e,f,g,h,a,31,0x14292967)
feb11 4:0da19393bd57 223
feb11 4:0da19393bd57 224 R2(a,b,c,d,e,f,g,h,32,0x27b70a85)
feb11 4:0da19393bd57 225 R2(h,a,b,c,d,e,f,g,33,0x2e1b2138)
feb11 4:0da19393bd57 226 R2(g,h,a,b,c,d,e,f,34,0x4d2c6dfc)
feb11 4:0da19393bd57 227 R2(f,g,h,a,b,c,d,e,35,0x53380d13)
feb11 4:0da19393bd57 228 R2(e,f,g,h,a,b,c,d,36,0x650a7354)
feb11 4:0da19393bd57 229 R2(d,e,f,g,h,a,b,c,37,0x766a0abb)
feb11 4:0da19393bd57 230 R2(c,d,e,f,g,h,a,b,38,0x81c2c92e)
feb11 4:0da19393bd57 231 R2(b,c,d,e,f,g,h,a,39,0x92722c85)
feb11 3:85c6ee25cf3e 232
feb11 4:0da19393bd57 233 R2(a,b,c,d,e,f,g,h,40,0xa2bfe8a1)
feb11 4:0da19393bd57 234 R2(h,a,b,c,d,e,f,g,41,0xa81a664b)
feb11 4:0da19393bd57 235 R2(g,h,a,b,c,d,e,f,42,0xc24b8b70)
feb11 4:0da19393bd57 236 R2(f,g,h,a,b,c,d,e,43,0xc76c51a3)
feb11 4:0da19393bd57 237 R2(e,f,g,h,a,b,c,d,44,0xd192e819)
feb11 4:0da19393bd57 238 R2(d,e,f,g,h,a,b,c,45,0xd6990624)
feb11 4:0da19393bd57 239 R2(c,d,e,f,g,h,a,b,46,0xf40e3585)
feb11 4:0da19393bd57 240 R2(b,c,d,e,f,g,h,a,47,0x106aa070)
feb11 3:85c6ee25cf3e 241
feb11 4:0da19393bd57 242 R2(a,b,c,d,e,f,g,h,48,0x19a4c116)
feb11 4:0da19393bd57 243 R2(h,a,b,c,d,e,f,g,49,0x1e376c08)
feb11 4:0da19393bd57 244 R2(g,h,a,b,c,d,e,f,50,0x2748774c)
feb11 4:0da19393bd57 245 R2(f,g,h,a,b,c,d,e,51,0x34b0bcb5)
feb11 4:0da19393bd57 246 R2(e,f,g,h,a,b,c,d,52,0x391c0cb3)
feb11 4:0da19393bd57 247 R2(d,e,f,g,h,a,b,c,53,0x4ed8aa4a)
feb11 4:0da19393bd57 248 R2(c,d,e,f,g,h,a,b,54,0x5b9cca4f)
feb11 4:0da19393bd57 249 R2(b,c,d,e,f,g,h,a,55,0x682e6ff3)
feb11 4:0da19393bd57 250
feb11 4:0da19393bd57 251 R2(a,b,c,d,e,f,g,h,56,0x748f82ee)
feb11 4:0da19393bd57 252 R2(h,a,b,c,d,e,f,g,57,0x78a5636f)
feb11 4:0da19393bd57 253 R2(g,h,a,b,c,d,e,f,58,0x84c87814)
feb11 4:0da19393bd57 254 R2(f,g,h,a,b,c,d,e,59,0x8cc70208)
feb11 4:0da19393bd57 255 R2(e,f,g,h,a,b,c,d,60,0x90befffa)
feb11 4:0da19393bd57 256 R2(d,e,f,g,h,a,b,c,61,0xa4506ceb)
feb11 4:0da19393bd57 257 R2(c,d,e,f,g,h,a,b,62,0xbef9a3f7)
feb11 4:0da19393bd57 258 R2(b,c,d,e,f,g,h,a,63,0xc67178f2)
feb11 3:85c6ee25cf3e 259
feb11 0:7a1237bd2d13 260
feb11 0:7a1237bd2d13 261 *h02 += a;
feb11 0:7a1237bd2d13 262 *h12 += b;
feb11 0:7a1237bd2d13 263 *h22 += c;
feb11 0:7a1237bd2d13 264 *h32 += d;
feb11 0:7a1237bd2d13 265 *h42 += e;
feb11 0:7a1237bd2d13 266 *h52 += f;
feb11 0:7a1237bd2d13 267 *h62 += g;
feb11 0:7a1237bd2d13 268 *h72 += h;
feb11 0:7a1237bd2d13 269 }
feb11 0:7a1237bd2d13 270
feb11 0:7a1237bd2d13 271 void SHA2_32::computeDigest(SHA_32_TYPE type, uint8_t *digest, uint8_t *in, uint32_t length)
feb11 0:7a1237bd2d13 272 {
feb11 0:7a1237bd2d13 273 uint32_t h0 = H[type*8], h1 = H[type*8+1], h2 = H[type*8+2], h3 = H[type*8+3];
feb11 0:7a1237bd2d13 274 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 275 uint64_t lengthBit = length << 3;
feb11 0:7a1237bd2d13 276 uint16_t padding;
feb11 0:7a1237bd2d13 277 if(length % 64 < 56)
feb11 0:7a1237bd2d13 278 padding = 56 - (length % 64);
feb11 0:7a1237bd2d13 279 else
feb11 0:7a1237bd2d13 280 padding = 56 + (64 - (length % 64));
feb11 3:85c6ee25cf3e 281
feb11 3:85c6ee25cf3e 282 while(length >= 64)
feb11 0:7a1237bd2d13 283 {
feb11 3:85c6ee25cf3e 284 computeBlock(&h0, &h1, &h2, &h3, &h4, &h5, &h6, &h7, in);
feb11 3:85c6ee25cf3e 285 length -= 64;
feb11 3:85c6ee25cf3e 286 in += 64;
feb11 0:7a1237bd2d13 287 }
feb11 3:85c6ee25cf3e 288 uint8_t buffer[64];
feb11 3:85c6ee25cf3e 289 memcpy(buffer, in,length);
feb11 3:85c6ee25cf3e 290 buffer[length++] = 0x80;
feb11 3:85c6ee25cf3e 291 padding--;
feb11 3:85c6ee25cf3e 292 if(padding+length == 56)
feb11 3:85c6ee25cf3e 293 memset(&buffer[length], 0, padding);
feb11 3:85c6ee25cf3e 294 else
feb11 3:85c6ee25cf3e 295 {
feb11 3:85c6ee25cf3e 296 memset(&buffer[length], 0, 64-length);
feb11 3:85c6ee25cf3e 297 computeBlock(&h0, &h1, &h2, &h3, &h4, &h5, &h6, &h7, buffer);
feb11 5:06cd9c8afa0b 298 memset(buffer, 0, 56);
feb11 3:85c6ee25cf3e 299 }
feb11 3:85c6ee25cf3e 300
feb11 0:7a1237bd2d13 301 uint32_t lengthBitLow = lengthBit;
feb11 0:7a1237bd2d13 302 uint32_t lengthBitHigh = lengthBit >> 32;
feb11 2:473bac39ae7c 303 lengthBitLow = __rev(lengthBitLow);
feb11 2:473bac39ae7c 304 memcpy(&buffer[60], &lengthBitLow, 4);
feb11 2:473bac39ae7c 305 lengthBitHigh = __rev(lengthBitHigh);
feb11 2:473bac39ae7c 306 memcpy(&buffer[56], &lengthBitHigh, 4);
feb11 0:7a1237bd2d13 307 computeBlock(&h0, &h1, &h2, &h3, &h4, &h5, &h6, &h7, buffer);
feb11 0:7a1237bd2d13 308
feb11 2:473bac39ae7c 309 h0 = __rev(h0);
feb11 2:473bac39ae7c 310 h1 = __rev(h1);
feb11 2:473bac39ae7c 311 h2 = __rev(h2);
feb11 2:473bac39ae7c 312 h3 = __rev(h3);
feb11 2:473bac39ae7c 313 h4 = __rev(h4);
feb11 2:473bac39ae7c 314 h5 = __rev(h5);
feb11 2:473bac39ae7c 315 h6 = __rev(h6);
feb11 2:473bac39ae7c 316
feb11 2:473bac39ae7c 317 memcpy(digest, &h0, 4);
feb11 2:473bac39ae7c 318 memcpy(&digest[4], &h1, 4);
feb11 2:473bac39ae7c 319 memcpy(&digest[8], &h2, 4);
feb11 2:473bac39ae7c 320 memcpy(&digest[12], &h3, 4);
feb11 2:473bac39ae7c 321 memcpy(&digest[16], &h4, 4);
feb11 2:473bac39ae7c 322 memcpy(&digest[20], &h5, 4);
feb11 2:473bac39ae7c 323 memcpy(&digest[24], &h6, 4);
feb11 2:473bac39ae7c 324
feb11 0:7a1237bd2d13 325
feb11 0:7a1237bd2d13 326 if(type == SHA_256)
feb11 0:7a1237bd2d13 327 {
feb11 2:473bac39ae7c 328 h7 = __rev(h7);
feb11 2:473bac39ae7c 329 memcpy(&digest[28], &h7, 4);
feb11 0:7a1237bd2d13 330 }
feb11 0:7a1237bd2d13 331 }