1 files changed, 33 insertions, 17 deletions
diff --git a/src/hash/sha2/sha2_32.cpp b/src/hash/sha2/sha2_32.cpp
index 9da2ec23f..7068dd63f 100644
--- a/src/hash/sha2/sha2_32.cpp
+++ b/src/hash/sha2/sha2_32.cpp
@@ -56,13 +56,27 @@ void SHA_224_256_BASE::compress_n(const byte input[], u32bit blocks)
 
    for(u32bit i = 0; i != blocks; ++i)
       {
-      for(u32bit j = 0; j != 16; ++j)
-         W[j] = load_be<u32bit>(input, j);
-      input += HASH_BLOCK_SIZE;
-
-      for(u32bit j = 16; j != 64; ++j)
-         W[j] = sigma(W[j- 2], 17, 19, 10) + W[j- 7] +
-            sigma(W[j-15],  7, 18,  3) + W[j-16];
+      load_be(W.begin(), input, 16);
+
+      for(u32bit j = 16; j != 64; j += 8)
+         {
+         W[j  ] = sigma(W[j- 2], 17, 19, 10) + W[j-7] +
+                  sigma(W[j-15],  7, 18,  3) + W[j-16];
+         W[j+1] = sigma(W[j- 1], 17, 19, 10) + W[j-6] +
+                  sigma(W[j-14],  7, 18,  3) + W[j-15];
+         W[j+2] = sigma(W[j   ], 17, 19, 10) + W[j-5] +
+                  sigma(W[j-13],  7, 18,  3) + W[j-14];
+         W[j+3] = sigma(W[j+ 1], 17, 19, 10) + W[j-4] +
+                  sigma(W[j-12],  7, 18,  3) + W[j-13];
+         W[j+4] = sigma(W[j+ 2], 17, 19, 10) + W[j-3] +
+                  sigma(W[j-11],  7, 18,  3) + W[j-12];
+         W[j+5] = sigma(W[j+ 3], 17, 19, 10) + W[j-2] +
+                  sigma(W[j-10],  7, 18,  3) + W[j-11];
+         W[j+6] = sigma(W[j+ 4], 17, 19, 10) + W[j-1] +
+                  sigma(W[j- 9],  7, 18,  3) + W[j-10];
+         W[j+7] = sigma(W[j+ 5], 17, 19, 10) + W[j  ] +
+                  sigma(W[j- 8],  7, 18,  3) + W[j- 9];
+         }
 
       F1(A, B, C, D, E, F, G, H, W[ 0], 0x428A2F98);
       F1(H, A, B, C, D, E, F, G, W[ 1], 0x71374491);
@@ -137,6 +151,8 @@ void SHA_224_256_BASE::compress_n(const byte input[], u32bit blocks)
       F = (digest[5] += F);
       G = (digest[6] += G);
       H = (digest[7] += H);
+
+      input += HASH_BLOCK_SIZE;
       }
    }
 
@@ -152,7 +168,7 @@ void SHA_224_256_BASE::copy_out(byte output[])
 /*
 * Clear memory of sensitive data
 */
-void SHA_224_256_BASE::clear() throw()
+void SHA_224_256_BASE::clear()
    {
    MDx_HashFunction::clear();
    W.clear();
@@ -161,23 +177,23 @@ void SHA_224_256_BASE::clear() throw()
 /*
 * Clear memory of sensitive data
 */
-void SHA_224::clear() throw()
+void SHA_224::clear()
    {
    SHA_224_256_BASE::clear();
-   digest[0] = 0xc1059ed8;
-   digest[1] = 0x367cd507;
-   digest[2] = 0x3070dd17;
-   digest[3] = 0xf70e5939;
-   digest[4] = 0xffc00b31;
+   digest[0] = 0xC1059ED8;
+   digest[1] = 0x367CD507;
+   digest[2] = 0x3070DD17;
+   digest[3] = 0xF70E5939;
+   digest[4] = 0xFFC00B31;
    digest[5] = 0x68581511;
-   digest[6] = 0x64f98fa7;
-   digest[7] = 0xbefa4fa4;
+   digest[6] = 0x64F98FA7;
+   digest[7] = 0xBEFA4FA4;
    }
 
 /*
 * Clear memory of sensitive data
 */
-void SHA_256::clear() throw()
+void SHA_256::clear()
    {
    SHA_224_256_BASE::clear();
    digest[0] = 0x6A09E667;