Diff: SHA1.cpp

Revision:

6:19aa835f2bbb

Parent:

5:06cd9c8afa0b

diff -r 06cd9c8afa0b -r 19aa835f2bbb SHA1.cpp
--- a/SHA1.cpp	Thu Sep 12 15:08:51 2013 +0000
+++ b/SHA1.cpp	Thu Sep 12 16:03:43 2013 +0000
@@ -59,34 +59,34 @@
     return 20;
 }
 
-void SHA1::update(uint8_t *in, uint32_t length)
+void SHA1::update(uint8_t *data, uint32_t length)
 {
     if(length < 64-bufferLength)
     {
-        memcpy(&buffer[bufferLength], in, length);
+        memcpy(&buffer[bufferLength], data, length);
         bufferLength += length;
         totalBufferLength += length;
         return;
     }
     int offset = 64-bufferLength;
-    memcpy(&buffer[bufferLength], in, offset);
+    memcpy(&buffer[bufferLength], data, offset);
     computeBlock(&h0,&h1,&h2,&h3,&h4, buffer);
     while(length-offset > 64)
     {
-        memcpy(buffer, &in[offset], 64);
+        memcpy(buffer, &data[offset], 64);
         computeBlock(&h0,&h1,&h2,&h3,&h4, buffer);
         offset += 64;
     }
     if(offset > length)
         offset -= 64;
     bufferLength = length - offset;
-    memcpy(buffer, &in[offset], bufferLength);
+    memcpy(buffer, &data[offset], bufferLength);
     totalBufferLength += length;
 }
 
-void SHA1::finalize(uint8_t *digest)
+void SHA1::finalize(uint8_t *hash)
 {
-    uint32_t *digest2 = (uint32_t*)digest;
+    uint32_t *hash2 = (uint32_t*)hash;
     uint16_t padding;
     if(totalBufferLength % 64 < 56)
         padding = 56 - (totalBufferLength % 64);
@@ -113,11 +113,11 @@
     memcpy(&buffer[60], &lengthBitLow, 4);
     computeBlock(&h0,&h1,&h2,&h3,&h4, buffer);
     
-    digest2[0] = __rev(h0);
-    digest2[1] = __rev(h1);
-    digest2[2] = __rev(h2);
-    digest2[3] = __rev(h3);
-    digest2[4] = __rev(h4);
+    hash2[0] = __rev(h0);
+    hash2[1] = __rev(h1);
+    hash2[2] = __rev(h2);
+    hash2[3] = __rev(h3);
+    hash2[4] = __rev(h4);
     
     // reset state
     h0 = H0;
@@ -129,6 +129,54 @@
     bufferLength = 0;
 }
 
+
+void SHA1::computeHash(uint8_t *hash, uint8_t *data, uint32_t length)
+{
+    uint32_t *hash2 = (uint32_t*)hash;
+    uint64_t lengthBit = length << 3;
+    uint32_t padding;
+    if(length % 64 < 56)
+        padding = 56 - (length % 64);
+    else
+        padding = 56 + (64 - (length % 64));
+        
+    uint32_t h0 = H0, h1 = H1, h2 = H2, h3 = H3, h4 = H4;
+    while(length >= 64)
+    {
+        computeBlock(&h0,&h1,&h2,&h3,&h4, data);
+        length -= 64;
+        data += 64;
+    }
+   
+    uint8_t buffer[64];
+    memcpy(buffer, data, length);
+    buffer[length++] = 0x80;
+    padding--;
+    if(padding+length+8 == 64)
+        memset(&buffer[length], 0, padding);
+    else
+    {
+        memset(&buffer[length], 0, 64-length);
+        computeBlock(&h0,&h1,&h2,&h3,&h4, buffer);
+        memset(buffer, 0, 56);
+    }
+
+    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, buffer);
+
+    hash2[0] = __rev(h0);
+    hash2[1] = __rev(h1);
+    hash2[2] = __rev(h2);
+    hash2[3] = __rev(h3);
+    hash2[4] = __rev(h4);
+}
+
 void SHA1::computeBlock(uint32_t *h02, uint32_t *h12, uint32_t *h22, uint32_t *h32, uint32_t *h42, uint8_t *buffer)
 {
     uint32_t *buffer2 = (uint32_t*)buffer;
@@ -171,58 +219,3 @@
     *h42 += e;
 }
 
-
-
-/* method 1 */
-void SHA1::computeDigest(uint8_t *digest, uint8_t *in, uint32_t length)
-{
-    uint64_t lengthBit = length << 3;
-    uint32_t padding;
-    if(length % 64 < 56)
-        padding = 56 - (length % 64);
-    else
-        padding = 56 + (64 - (length % 64));
-        
-    uint32_t h0 = H0, h1 = H1, h2 = H2, h3 = H3, h4 = H4;
-    while(length >= 64)
-    {
-        computeBlock(&h0,&h1,&h2,&h3,&h4, in);
-        length -= 64;
-        in += 64;
-    }
-   
-    uint8_t buffer[64];
-    memcpy(buffer, in, length);
-    buffer[length++] = 0x80;
-    padding--;
-    if(padding+length+8 == 64)
-        memset(&buffer[length], 0, padding);
-    else
-    {
-        memset(&buffer[length], 0, 64-length);
-        computeBlock(&h0,&h1,&h2,&h3,&h4, buffer);
-        memset(buffer, 0, 56);
-    }
-
-    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, buffer);
-
-    h0 = __rev(h0);
-    h1 = __rev(h1);
-    h2 = __rev(h2);
-    h3 = __rev(h3);
-    h4 = __rev(h4);
-    
-    memcpy(digest, &h0, 4);
-    memcpy(&digest[4], &h1, 4);
-    memcpy(&digest[8], &h2, 4);
-    memcpy(&digest[12], &h3, 4);
-    memcpy(&digest[16], &h4, 4);
-}
-