Diff: hash/SHA2_32.cpp

Revision:

7:2dbbdfb08123

Parent:

6:19aa835f2bbb

Child:

10:bc9c23aa3870

diff -r 19aa835f2bbb -r 2dbbdfb08123 hash/SHA2_32.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hash/SHA2_32.cpp	Sat Sep 14 18:21:32 2013 +0000
@@ -0,0 +1,314 @@
+#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;
+}
+