1 files changed, 130 insertions, 0 deletions
diff --git a/src-cryptopp/misc.cpp b/src-cryptopp/misc.cpp
new file mode 100644
index 0000000..7e4fa89
--- /dev/null
+++ b/src-cryptopp/misc.cpp
@@ -0,0 +1,130 @@
+// misc.cpp - written and placed in the public domain by Wei Dai
+
+#include "pch.h"
+
+#ifndef CRYPTOPP_IMPORTS
+
+#include "misc.h"
+#include "words.h"
+#include <new>
+
+NAMESPACE_BEGIN(CryptoPP)
+
+void xorbuf(byte *buf, const byte *mask, size_t count)
+{
+	size_t i;
+
+	if (IsAligned<word32>(buf) && IsAligned<word32>(mask))
+	{
+		if (!CRYPTOPP_BOOL_SLOW_WORD64 && IsAligned<word64>(buf) && IsAligned<word64>(mask))
+		{
+			for (i=0; i<count/8; i++)
+				((word64*)buf)[i] ^= ((word64*)mask)[i];
+			count -= 8*i;
+			if (!count)
+				return;
+			buf += 8*i;
+			mask += 8*i;
+		}
+
+		for (i=0; i<count/4; i++)
+			((word32*)buf)[i] ^= ((word32*)mask)[i];
+		count -= 4*i;
+		if (!count)
+			return;
+		buf += 4*i;
+		mask += 4*i;
+	}
+
+	for (i=0; i<count; i++)
+		buf[i] ^= mask[i];
+}
+
+void xorbuf(byte *output, const byte *input, const byte *mask, size_t count)
+{
+	size_t i;
+
+	if (IsAligned<word32>(output) && IsAligned<word32>(input) && IsAligned<word32>(mask))
+	{
+		if (!CRYPTOPP_BOOL_SLOW_WORD64 && IsAligned<word64>(output) && IsAligned<word64>(input) && IsAligned<word64>(mask))
+		{
+			for (i=0; i<count/8; i++)
+				((word64*)output)[i] = ((word64*)input)[i] ^ ((word64*)mask)[i];
+			count -= 8*i;
+			if (!count)
+				return;
+			output += 8*i;
+			input += 8*i;
+			mask += 8*i;
+		}
+
+		for (i=0; i<count/4; i++)
+			((word32*)output)[i] = ((word32*)input)[i] ^ ((word32*)mask)[i];
+		count -= 4*i;
+		if (!count)
+			return;
+		output += 4*i;
+		input += 4*i;
+		mask += 4*i;
+	}
+
+	for (i=0; i<count; i++)
+		output[i] = input[i] ^ mask[i];
+}
+
+bool VerifyBufsEqual(const byte *buf, const byte *mask, size_t count)
+{
+	size_t i;
+	byte acc8 = 0;
+
+	if (IsAligned<word32>(buf) && IsAligned<word32>(mask))
+	{
+		word32 acc32 = 0;
+		if (!CRYPTOPP_BOOL_SLOW_WORD64 && IsAligned<word64>(buf) && IsAligned<word64>(mask))
+		{
+			word64 acc64 = 0;
+			for (i=0; i<count/8; i++)
+				acc64 |= ((word64*)buf)[i] ^ ((word64*)mask)[i];
+			count -= 8*i;
+			if (!count)
+				return acc64 == 0;
+			buf += 8*i;
+			mask += 8*i;
+			acc32 = word32(acc64) | word32(acc64>>32);
+		}
+
+		for (i=0; i<count/4; i++)
+			acc32 |= ((word32*)buf)[i] ^ ((word32*)mask)[i];
+		count -= 4*i;
+		if (!count)
+			return acc32 == 0;
+		buf += 4*i;
+		mask += 4*i;
+		acc8 = byte(acc32) | byte(acc32>>8) | byte(acc32>>16) | byte(acc32>>24);
+	}
+
+	for (i=0; i<count; i++)
+		acc8 |= buf[i] ^ mask[i];
+	return acc8 == 0;
+}
+
+#if !(defined(_MSC_VER) && (_MSC_VER < 1300))
+using std::new_handler;
+using std::set_new_handler;
+#endif
+
+void CallNewHandler()
+{
+	new_handler newHandler = set_new_handler(NULL);
+	if (newHandler)
+		set_new_handler(newHandler);
+
+	if (newHandler)
+		newHandler();
+	else
+		throw std::bad_alloc();
+}
+
+NAMESPACE_END
+
+#endif