Diff: SHA2_32.cpp

Revision:

7:2dbbdfb08123

Parent:

6:19aa835f2bbb

Child:

8:a090264e9b2d

--- a/SHA2_32.cpp	Thu Sep 12 16:03:43 2013 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,314 +0,0 @@
-#include "SHA2_32.h"
-#include <string.h>
-#include <stdio.h>
-#include <stdlib.h>
-
-
-static const uint8_t MASK = 0x0F;
-#define W(t) (w[(t)] = SSIG1(w[((t)+14)&MASK]) + w[((t)+9)&MASK] + SSIG0(w[((t)+1)&MASK]) + w[t])
-
-#define ROTL(W,N) (((W) << (N)) | ((W) >> (32-(N))))
-#define ROTR(W,N) (((W) >> (N)) | ((W) << (32-(N))))
-#define CH(X,Y,Z) (((X) & (Y)) ^ ((~(X)) & (Z)))
-#define MAJ(X,Y,Z) (((X) & (Y)) ^ ((X) & (Z)) ^ ((Y) & (Z)))
-#define BSIG0(X) (ROTR(X,2) ^ ROTR(X,13) ^ ROTR(X,22))
-#define BSIG1(X) (ROTR(X,6) ^ ROTR(X,11) ^ ROTR(X,25))
-#define SSIG0(X) (ROTR((X),7) ^ ROTR((X),18) ^ ((X) >> 3))
-#define SSIG1(X) (ROTR((X),17) ^ ROTR((X),19) ^ ((X) >> 10))
-#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])); \
-                              T2 = BSIG0(A) + MAJ(A,B,C); \
-                              D += T1; \
-                              H = T1 + T2;
-#define R2(A,B,C,D,E,F,G,H,T,K)  T1 = H + BSIG1(E) + CH(E,F,G) + K + W(T&MASK); \
-                              T2 = BSIG0(A) + MAJ(A,B,C); \
-                              D += T1; \
-                              H = T1 + T2;
-        
-static const uint32_t H[] =
-{
-    // SHA-224
-    0xc1059ed8, 0x367cd507, 0x3070dd17, 0xf70e5939,
-    0xffc00b31, 0x68581511, 0x64f98fa7, 0xbefa4fa4,
-    
-    // SHA-256      
-    0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a,
-    0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19
-};
-
-SHA2_32::SHA2_32(SHA_32_TYPE t):
-type(t),
-totalBufferLength(0),
-bufferLength(0)
-{
-    switch(type)
-    {
-        case SHA_224:
-            h0 = H[0];
-            h1 = H[1];
-            h2 = H[2];
-            h3 = H[3];
-            h4 = H[4];
-            h5 = H[5];
-            h6 = H[6];
-            h7 = H[7];
-        break;
-        
-        case SHA_256:
-            h0 = H[8];
-            h1 = H[9];
-            h2 = H[10];
-            h3 = H[11];
-            h4 = H[12];
-            h5 = H[13];
-            h6 = H[14];
-            h7 = H[15];     
-        break;
-    }
-}
-
-void SHA2_32::update(uint8_t *data, uint32_t length)
-{
-    if(length < 64-bufferLength)
-    {
-        memcpy(&buffer[bufferLength], data, length);
-        bufferLength += length;
-        totalBufferLength += length;
-        return;
-    }
-    int offset = 64-bufferLength;
-    memcpy(&buffer[bufferLength], data, offset);
-    computeBlock(&h0,&h1,&h2,&h3,&h4,&h5,&h6,&h7,buffer);
-    while(length-offset > 64)
-    {
-        memcpy(buffer, &data[offset], 64);
-        computeBlock(&h0,&h1,&h2,&h3,&h4,&h5,&h6,&h7,buffer);
-        offset += 64;
-    }
-    if(offset > length)
-        offset -= 64;
-    bufferLength = length - offset;
-    memcpy(buffer, &data[offset], bufferLength);
-    totalBufferLength += length;
-}
-
-void SHA2_32::finalize(uint8_t *hash)
-{
-    uint32_t *hash2 = (uint32_t*)hash;
-    uint16_t padding;
-    if(totalBufferLength % 64 < 56)
-        padding = 56 - (totalBufferLength % 64);
-    else
-        padding = 56 + (64 - (totalBufferLength % 64));
-
-    buffer[bufferLength++] = 0x80;
-    padding--;
-    if(padding+bufferLength == 56)
-        memset(&buffer[bufferLength], 0, padding);
-    else
-    {
-        memset(&buffer[bufferLength], 0, 64-bufferLength);
-        computeBlock(&h0, &h1, &h2, &h3, &h4, &h5, &h6, &h7, buffer);
-        memset(buffer, 0, 56);
-    }
-    
-    uint64_t lengthBit = totalBufferLength << 3;
-    uint32_t lengthBitLow = lengthBit;
-    uint32_t lengthBitHigh = lengthBit >> 32;
-    lengthBitLow = __rev(lengthBitLow);
-    lengthBitHigh = __rev(lengthBitHigh);
-    memcpy(&buffer[60], &lengthBitLow, 4);    
-    memcpy(&buffer[56], &lengthBitHigh, 4);    
-    computeBlock(&h0, &h1, &h2, &h3, &h4, &h5, &h6, &h7, buffer);
-
-    hash2[0] = __rev(h0);
-    hash2[1] = __rev(h1);
-    hash2[2] = __rev(h2);
-    hash2[3] = __rev(h3);
-    hash2[4] = __rev(h4);
-    hash2[5] = __rev(h5);
-    hash2[6] = __rev(h6);
-
-    
-    if(type == SHA_256)
-        hash2[7] = __rev(h7);
-    
-    // reset state
-    switch(type)
-    {
-        case SHA_224:
-            h0 = H[0];
-            h1 = H[1];
-            h2 = H[2];
-            h3 = H[3];
-            h4 = H[4];
-            h5 = H[5];
-            h6 = H[6];
-            h7 = H[7];
-        break;
-        
-        case SHA_256:
-            h0 = H[8];
-            h1 = H[9];
-            h2 = H[10];
-            h3 = H[11];
-            h4 = H[12];
-            h5 = H[13];
-            h6 = H[14];
-            h7 = H[15];     
-        break;
-    }
-    totalBufferLength = 0;
-    bufferLength = 0;
-}
-
-void SHA2_32::computeHash(SHA_32_TYPE type, uint8_t *hash, uint8_t *data, uint32_t length)
-{
-    uint32_t *hash2 = (uint32_t*)hash;
-    uint32_t h0 = H[type*8], h1 = H[type*8+1], h2 = H[type*8+2], h3 = H[type*8+3];
-    uint32_t h4 = H[type*8+4], h5 = H[type*8+5], h6 = H[type*8+6], h7 = H[type*8+7];
-    uint64_t lengthBit = length << 3;
-    uint16_t padding;
-    if(length % 64 < 56)
-        padding = 56 - (length % 64);
-    else
-        padding = 56 + (64 - (length % 64));
-        
-    while(length >= 64)
-    {
-        computeBlock(&h0, &h1, &h2, &h3, &h4, &h5, &h6, &h7, data);
-        length -= 64;
-        data += 64;
-    }
-    uint8_t buffer[64];
-    memcpy(buffer, data,length); 
-    buffer[length++] = 0x80;
-    padding--;
-    if(padding+length == 56)
-        memset(&buffer[length], 0, padding);
-    else
-    {
-        memset(&buffer[length], 0, 64-length);
-        computeBlock(&h0, &h1, &h2, &h3, &h4, &h5, &h6, &h7, buffer);
-        memset(buffer, 0, 56);
-    }
-    
-    uint32_t lengthBitLow = lengthBit;
-    uint32_t lengthBitHigh = lengthBit >> 32;
-    lengthBitLow = __rev(lengthBitLow);
-    memcpy(&buffer[60], &lengthBitLow, 4);
-    lengthBitHigh = __rev(lengthBitHigh);
-    memcpy(&buffer[56], &lengthBitHigh, 4);    
-    computeBlock(&h0, &h1, &h2, &h3, &h4, &h5, &h6, &h7, buffer);
-
-    hash2[0] = __rev(h0);
-    hash2[1] = __rev(h1);
-    hash2[2] = __rev(h2);
-    hash2[3] = __rev(h3);
-    hash2[4] = __rev(h4);
-    hash2[5] = __rev(h5);
-    hash2[6] = __rev(h6);
-
-    
-    if(type == SHA_256)
-        hash2[7] = __rev(h7);
-}
-
-void SHA2_32::computeBlock(uint32_t *h02, 
-                        uint32_t *h12, 
-                        uint32_t *h22, 
-                        uint32_t *h32, 
-                        uint32_t *h42, 
-                        uint32_t *h52, 
-                        uint32_t *h62,
-                        uint32_t *h72,
-                        uint8_t *buffer)
-{
-    uint32_t w[16];
-    uint32_t *buffer2 = (uint32_t*)buffer;
-    uint32_t a = *h02, b = *h12, c = *h22, d = *h32, e = *h42, f = *h52, g = *h62, h = *h72;
-    uint32_t T1, T2;
-
-
-    R(a,b,c,d,e,f,g,h,0,0x428a2f98)
-    R(h,a,b,c,d,e,f,g,1,0x71374491)
-    R(g,h,a,b,c,d,e,f,2,0xb5c0fbcf)
-    R(f,g,h,a,b,c,d,e,3,0xe9b5dba5)
-    R(e,f,g,h,a,b,c,d,4,0x3956c25b)
-    R(d,e,f,g,h,a,b,c,5,0x59f111f1)
-    R(c,d,e,f,g,h,a,b,6,0x923f82a4)
-    R(b,c,d,e,f,g,h,a,7,0xab1c5ed5)
-
-    R(a,b,c,d,e,f,g,h,8,0xd807aa98)
-    R(h,a,b,c,d,e,f,g,9,0x12835b01)
-    R(g,h,a,b,c,d,e,f,10,0x243185be)
-    R(f,g,h,a,b,c,d,e,11,0x550c7dc3)
-    R(e,f,g,h,a,b,c,d,12,0x72be5d74)
-    R(d,e,f,g,h,a,b,c,13,0x80deb1fe)
-    R(c,d,e,f,g,h,a,b,14,0x9bdc06a7)
-    R(b,c,d,e,f,g,h,a,15,0xc19bf174)
-
-    R2(a,b,c,d,e,f,g,h,16,0xe49b69c1)
-    R2(h,a,b,c,d,e,f,g,17,0xefbe4786)
-    R2(g,h,a,b,c,d,e,f,18,0x0fc19dc6)
-    R2(f,g,h,a,b,c,d,e,19,0x240ca1cc)
-    R2(e,f,g,h,a,b,c,d,20,0x2de92c6f)
-    R2(d,e,f,g,h,a,b,c,21,0x4a7484aa)
-    R2(c,d,e,f,g,h,a,b,22,0x5cb0a9dc)
-    R2(b,c,d,e,f,g,h,a,23,0x76f988da)
-    
-    R2(a,b,c,d,e,f,g,h,24,0x983e5152)
-    R2(h,a,b,c,d,e,f,g,25,0xa831c66d)
-    R2(g,h,a,b,c,d,e,f,26,0xb00327c8)
-    R2(f,g,h,a,b,c,d,e,27,0xbf597fc7)
-    R2(e,f,g,h,a,b,c,d,28,0xc6e00bf3)
-    R2(d,e,f,g,h,a,b,c,29,0xd5a79147)
-    R2(c,d,e,f,g,h,a,b,30,0x06ca6351)
-    R2(b,c,d,e,f,g,h,a,31,0x14292967) 
-
-    R2(a,b,c,d,e,f,g,h,32,0x27b70a85)
-    R2(h,a,b,c,d,e,f,g,33,0x2e1b2138)
-    R2(g,h,a,b,c,d,e,f,34,0x4d2c6dfc)
-    R2(f,g,h,a,b,c,d,e,35,0x53380d13)
-    R2(e,f,g,h,a,b,c,d,36,0x650a7354)
-    R2(d,e,f,g,h,a,b,c,37,0x766a0abb)
-    R2(c,d,e,f,g,h,a,b,38,0x81c2c92e)
-    R2(b,c,d,e,f,g,h,a,39,0x92722c85)
-    
-    R2(a,b,c,d,e,f,g,h,40,0xa2bfe8a1)
-    R2(h,a,b,c,d,e,f,g,41,0xa81a664b)
-    R2(g,h,a,b,c,d,e,f,42,0xc24b8b70)
-    R2(f,g,h,a,b,c,d,e,43,0xc76c51a3)
-    R2(e,f,g,h,a,b,c,d,44,0xd192e819)
-    R2(d,e,f,g,h,a,b,c,45,0xd6990624)
-    R2(c,d,e,f,g,h,a,b,46,0xf40e3585)
-    R2(b,c,d,e,f,g,h,a,47,0x106aa070)
-    
-    R2(a,b,c,d,e,f,g,h,48,0x19a4c116)
-    R2(h,a,b,c,d,e,f,g,49,0x1e376c08)
-    R2(g,h,a,b,c,d,e,f,50,0x2748774c)
-    R2(f,g,h,a,b,c,d,e,51,0x34b0bcb5)
-    R2(e,f,g,h,a,b,c,d,52,0x391c0cb3)
-    R2(d,e,f,g,h,a,b,c,53,0x4ed8aa4a)
-    R2(c,d,e,f,g,h,a,b,54,0x5b9cca4f)
-    R2(b,c,d,e,f,g,h,a,55,0x682e6ff3)
-    
-    R2(a,b,c,d,e,f,g,h,56,0x748f82ee)
-    R2(h,a,b,c,d,e,f,g,57,0x78a5636f)
-    R2(g,h,a,b,c,d,e,f,58,0x84c87814)
-    R2(f,g,h,a,b,c,d,e,59,0x8cc70208)
-    R2(e,f,g,h,a,b,c,d,60,0x90befffa)
-    R2(d,e,f,g,h,a,b,c,61,0xa4506ceb)
-    R2(c,d,e,f,g,h,a,b,62,0xbef9a3f7)
-    R2(b,c,d,e,f,g,h,a,63,0xc67178f2)
-    
-    
-    *h02 += a;
-    *h12 += b;
-    *h22 += c;
-    *h32 += d;
-    *h42 += e;
-    *h52 += f;
-    *h62 += g;
-    *h72 += h;
-}
-