1 files changed, 65 insertions, 0 deletions
diff --git a/src/utils/xor_buf.h b/src/utils/xor_buf.h
new file mode 100644
index 000000000..0a71aef3e
--- /dev/null
+++ b/src/utils/xor_buf.h
@@ -0,0 +1,65 @@
+/*************************************************
+* Xor Operations Header File                     *
+* (C) 1999-2008 Jack Lloyd                       *
+*************************************************/
+
+#ifndef BOTAN_XOR_BUF_H__
+#define BOTAN_XOR_BUF_H__
+
+#include <botan/types.h>
+
+namespace Botan {
+
+/*************************************************
+* XOR Arrays                                     *
+*************************************************/
+inline void xor_buf(byte out[], const byte in[], u32bit length)
+   {
+   while(length >= 8)
+      {
+#if BOTAN_UNALIGNED_LOADSTOR_OK
+      *reinterpret_cast<u64bit*>(out) ^= *reinterpret_cast<const u64bit*>(in);
+#else
+      out[0] ^= in[0]; out[1] ^= in[1];
+      out[2] ^= in[2]; out[3] ^= in[3];
+      out[4] ^= in[4]; out[5] ^= in[5];
+      out[6] ^= in[6]; out[7] ^= in[7];
+#endif
+
+      out += 8; in += 8; length -= 8;
+      }
+   for(u32bit j = 0; j != length; ++j)
+      out[j] ^= in[j];
+   }
+
+/*************************************************
+* XOR Arrays                                     *
+*************************************************/
+inline void xor_buf(byte out[],
+                    const byte in[],
+                    const byte in2[],
+                    u32bit length)
+   {
+   while(length >= 8)
+      {
+#if BOTAN_UNALIGNED_LOADSTOR_OK
+      *reinterpret_cast<u64bit*>(out) =
+         *reinterpret_cast<const u64bit*>(in) ^
+         *reinterpret_cast<const u64bit*>(in2);
+#else
+      out[0] = in[0] ^ in2[0]; out[1] = in[1] ^ in2[1];
+      out[2] = in[2] ^ in2[2]; out[3] = in[3] ^ in2[3];
+      out[4] = in[4] ^ in2[4]; out[5] = in[5] ^ in2[5];
+      out[6] = in[6] ^ in2[6]; out[7] = in[7] ^ in2[7];
+#endif
+
+      in += 8; in2 += 8; out += 8; length -= 8;
+      }
+
+   for(u32bit j = 0; j != length; ++j)
+      out[j] = in[j] ^ in2[j];
+   }
+
+}
+
+#endif