From 539364846a89987ac2679988653f50332cb91d26 Mon Sep 17 00:00:00 2001
From: "madmaxoft@gmail.com"
 <madmaxoft@gmail.com@0a769ca7-a7f5-676a-18bf-c427514a06d6>
Date: Thu, 30 Aug 2012 21:06:13 +0000
Subject: Implemented 1.3.2 protocol encryption using CryptoPP, up to Client
 Status packet (http://wiki.vg/Protocol_FAQ step 14)

git-svn-id: http://mc-server.googlecode.com/svn/trunk@808 0a769ca7-a7f5-676a-18bf-c427514a06d6
---
 CryptoPP/misc.cpp | 187 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 187 insertions(+)
 create mode 100644 CryptoPP/misc.cpp

(limited to 'CryptoPP/misc.cpp')

diff --git a/CryptoPP/misc.cpp b/CryptoPP/misc.cpp
new file mode 100644
index 000000000..3c2c2a5f0
--- /dev/null
+++ b/CryptoPP/misc.cpp
@@ -0,0 +1,187 @@
+// 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>
+
+#if defined(CRYPTOPP_MEMALIGN_AVAILABLE) || defined(CRYPTOPP_MM_MALLOC_AVAILABLE) || defined(QNX)
+#include <malloc.h>
+#endif
+
+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();
+}
+
+#if CRYPTOPP_BOOL_ALIGN16_ENABLED
+
+void * AlignedAllocate(size_t size)
+{
+	byte *p;
+#ifdef CRYPTOPP_MM_MALLOC_AVAILABLE
+	while (!(p = (byte *)_mm_malloc(size, 16)))
+#elif defined(CRYPTOPP_MEMALIGN_AVAILABLE)
+	while (!(p = (byte *)memalign(16, size)))
+#elif defined(CRYPTOPP_MALLOC_ALIGNMENT_IS_16)
+	while (!(p = (byte *)malloc(size)))
+#else
+	while (!(p = (byte *)malloc(size + 16)))
+#endif
+		CallNewHandler();
+
+#ifdef CRYPTOPP_NO_ALIGNED_ALLOC
+	size_t adjustment = 16-((size_t)p%16);
+	p += adjustment;
+	p[-1] = (byte)adjustment;
+#endif
+
+	assert(IsAlignedOn(p, 16));
+	return p;
+}
+
+void AlignedDeallocate(void *p)
+{
+#ifdef CRYPTOPP_MM_MALLOC_AVAILABLE
+	_mm_free(p);
+#elif defined(CRYPTOPP_NO_ALIGNED_ALLOC)
+	p = (byte *)p - ((byte *)p)[-1];
+	free(p);
+#else
+	free(p);
+#endif
+}
+
+#endif
+
+void * UnalignedAllocate(size_t size)
+{
+	void *p;
+	while (!(p = malloc(size)))
+		CallNewHandler();
+	return p;
+}
+
+void UnalignedDeallocate(void *p)
+{
+	free(p);
+}
+
+NAMESPACE_END
+
+#endif
-- 
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