1 files changed, 63 insertions, 0 deletions
diff --git a/cbcmac.cpp b/cbcmac.cpp
new file mode 100644
index 00000000..cc0a9939
--- /dev/null
+++ b/cbcmac.cpp
@@ -0,0 +1,63 @@
+#include "pch.h"
+
+#ifndef CRYPTOPP_IMPORTS
+
+#include "cbcmac.h"
+
+NAMESPACE_BEGIN(CryptoPP)
+
+void CBC_MAC_Base::CheckedSetKey(void *, Empty empty, 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, unsigned int length)
+{
+	unsigned int blockSize = AccessCipher().BlockSize();
+
+	while (m_counter && length)
+	{
+		m_reg[m_counter++] ^= *input++;
+		if (m_counter == blockSize)
+			ProcessBuf();
+		length--;
+	}
+
+	while (length >= blockSize)
+	{
+		xorbuf(m_reg, input, blockSize);
+		ProcessBuf();
+		input += blockSize;
+		length -= blockSize;
+	}
+
+	while (length--)
+	{
+		m_reg[m_counter++] ^= *input++;
+		if (m_counter == blockSize)
+			ProcessBuf();
+	}
+}
+
+void CBC_MAC_Base::TruncatedFinal(byte *mac, unsigned int 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