From 3438e5d3ddf8444f0e31009ffbe8237ef3752c22 Mon Sep 17 00:00:00 2001
From: Alexander Harkness <bearbin@gmail.com>
Date: Sun, 24 Nov 2013 14:21:13 +0000
Subject: move cryptopp into lib

---
 lib/cryptopp/cbcmac.cpp | 62 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 62 insertions(+)
 create mode 100644 lib/cryptopp/cbcmac.cpp

(limited to 'lib/cryptopp/cbcmac.cpp')

diff --git a/lib/cryptopp/cbcmac.cpp b/lib/cryptopp/cbcmac.cpp
new file mode 100644
index 000000000..6b0e8858e
--- /dev/null
+++ b/lib/cryptopp/cbcmac.cpp
@@ -0,0 +1,62 @@
+#include "pch.h"
+
+#ifndef CRYPTOPP_IMPORTS
+
+#include "cbcmac.h"
+
+NAMESPACE_BEGIN(CryptoPP)
+
+void CBC_MAC_Base::UncheckedSetKey(const byte *key, unsigned int length, const NameValuePairs &params)
+{
+	AccessCipher().SetKey(key, length, params);
+	m_reg.CleanNew(AccessCipher().BlockSize());
+	m_counter = 0;
+}
+
+void CBC_MAC_Base::Update(const byte *input, size_t length)
+{
+	unsigned int blockSize = AccessCipher().BlockSize();
+
+	while (m_counter && length)
+	{
+		m_reg[m_counter++] ^= *input++;
+		if (m_counter == blockSize)
+			ProcessBuf();
+		length--;
+	}
+
+	if (length >= blockSize)
+	{
+		size_t leftOver = AccessCipher().AdvancedProcessBlocks(m_reg, input, m_reg, length, BlockTransformation::BT_DontIncrementInOutPointers|BlockTransformation::BT_XorInput);
+		input += (length - leftOver);
+		length = leftOver;
+	}
+
+	while (length--)
+	{
+		m_reg[m_counter++] ^= *input++;
+		if (m_counter == blockSize)
+			ProcessBuf();
+	}
+}
+
+void CBC_MAC_Base::TruncatedFinal(byte *mac, size_t size)
+{
+	ThrowIfInvalidTruncatedSize(size);
+
+	if (m_counter)
+		ProcessBuf();
+
+	memcpy(mac, m_reg, size);
+	memset(m_reg, 0, AccessCipher().BlockSize());
+}
+
+void CBC_MAC_Base::ProcessBuf()
+{
+	AccessCipher().ProcessBlock(m_reg);
+	m_counter = 0;
+}
+
+NAMESPACE_END
+
+#endif
-- 
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