Add Power8 SHA256 and SHA512 support (GH #513)

1 files changed, 19 insertions, 0 deletions

diff --git a/sha.cpp b/sha.cpp
index 713a1914..04dfb4d9 100644
--- a/sha.cpp
+++ b/sha.cpp
@@ -70,6 +70,11 @@ extern void SHA1_HashMultipleBlocks_ARMV8(word32 *state, const word32 *data, siz
 extern void SHA256_HashMultipleBlocks_ARMV8(word32 *state, const word32 *data, size_t length, ByteOrder order);

 #endif

 

+#if CRYPTOPP_POWER8_SHA_AVAILABLE

+extern void SHA256_HashMultipleBlocks_POWER8(word32 *state, const word32 *data, size_t length, ByteOrder order);

+extern void SHA512_HashMultipleBlocks_POWER8(word64 *state, const word64 *data, size_t length, ByteOrder order);

+#endif

+

 ////////////////////////////////

 // start of Steve Reid's code //

 ////////////////////////////////

@@ -684,6 +689,13 @@ void SHA256::Transform(word32 *state, const word32 *data)
         return;

     }

 #endif

+#if CRYPTOPP_POWER8_SHA_AVAILABLE

+    if (HasSHA256())

+    {

+        SHA256_HashMultipleBlocks_POWER8(state, data, SHA256::BLOCKSIZE, LITTLE_ENDIAN_ORDER);

+        return;

+    }

+#endif

 

     SHA256_HashBlock_CXX(state, data);

 }

@@ -715,6 +727,13 @@ size_t SHA256::HashMultipleBlocks(const word32 *input, size_t length)
         return length & (SHA256::BLOCKSIZE - 1);

     }

 #endif

+#if CRYPTOPP_POWER8_SHA_AVAILABLE

+    if (HasSHA256())

+    {

+        SHA256_HashMultipleBlocks_POWER8(m_state, input, length, BIG_ENDIAN_ORDER);

+        return length & (SHA256::BLOCKSIZE - 1);

+    }

+#endif

 

     const bool noReverse = NativeByteOrderIs(this->GetByteOrder());

     word32 *dataBuf = this->DataBuf();