initial commit

git-svn-id: http://svn.miranda-ng.org/main/trunk@2 1316c22d-e87f-b044-9b9b-93d7a3e3ba9c

1 files changed, 238 insertions, 0 deletions

diff --git a/plugins/CryptoPP/crypto/basecode.cpp b/plugins/CryptoPP/crypto/basecode.cpp
new file mode 100644
index 0000000000..ab94f81550
--- /dev/null
+++ b/plugins/CryptoPP/crypto/basecode.cpp
@@ -0,0 +1,238 @@
+// basecode.cpp - written and placed in the public domain by Wei Dai

+

+#include "pch.h"

+

+#ifndef CRYPTOPP_IMPORTS

+

+#include "basecode.h"

+#include "fltrimpl.h"

+#include <ctype.h>

+

+NAMESPACE_BEGIN(CryptoPP)

+

+void BaseN_Encoder::IsolatedInitialize(const NameValuePairs &parameters)

+{

+	parameters.GetRequiredParameter("BaseN_Encoder", Name::EncodingLookupArray(), m_alphabet);

+

+	parameters.GetRequiredIntParameter("BaseN_Encoder", Name::Log2Base(), m_bitsPerChar);

+	if (m_bitsPerChar <= 0 || m_bitsPerChar >= 8)

+		throw InvalidArgument("BaseN_Encoder: Log2Base must be between 1 and 7 inclusive");

+

+	byte padding;

+	bool pad;

+	if (parameters.GetValue(Name::PaddingByte(), padding))

+		pad = parameters.GetValueWithDefault(Name::Pad(), true);

+	else

+		pad = false;

+	m_padding = pad ? padding : -1;

+

+	m_bytePos = m_bitPos = 0;

+

+	int i = 8;

+	while (i%m_bitsPerChar != 0)

+		i += 8;

+	m_outputBlockSize = i/m_bitsPerChar;

+

+	m_outBuf.New(m_outputBlockSize);

+}

+

+size_t BaseN_Encoder::Put2(const byte *begin, size_t length, int messageEnd, bool blocking)

+{

+	FILTER_BEGIN;

+	while (m_inputPosition < length)

+	{

+		if (m_bytePos == 0)

+			memset(m_outBuf, 0, m_outputBlockSize);

+

+		{

+		unsigned int b = begin[m_inputPosition++], bitsLeftInSource = 8;

+		while (true)

+		{

+			assert(m_bitPos < m_bitsPerChar);

+			unsigned int bitsLeftInTarget = m_bitsPerChar-m_bitPos;

+			m_outBuf[m_bytePos] |= b >> (8-bitsLeftInTarget);

+			if (bitsLeftInSource >= bitsLeftInTarget)

+			{

+				m_bitPos = 0;

+				++m_bytePos;

+				bitsLeftInSource -= bitsLeftInTarget;

+				if (bitsLeftInSource == 0)

+					break;

+				b <<= bitsLeftInTarget;

+				b &= 0xff;

+			}

+			else

+			{

+				m_bitPos += bitsLeftInSource;

+				break;

+			}

+		}

+		}

+

+		assert(m_bytePos <= m_outputBlockSize);

+		if (m_bytePos == m_outputBlockSize)

+		{

+			int i;

+			for (i=0; i<m_bytePos; i++)

+			{

+				assert(m_outBuf[i] < (1 << m_bitsPerChar));

+				m_outBuf[i] = m_alphabet[m_outBuf[i]];

+			}

+			FILTER_OUTPUT(1, m_outBuf, m_outputBlockSize, 0);

+			

+			m_bytePos = m_bitPos = 0;

+		}

+	}

+	if (messageEnd)

+	{

+		if (m_bitPos > 0)

+			++m_bytePos;

+

+		int i;

+		for (i=0; i<m_bytePos; i++)

+			m_outBuf[i] = m_alphabet[m_outBuf[i]];

+

+		if (m_padding != -1 && m_bytePos > 0)

+		{

+			memset(m_outBuf+m_bytePos, m_padding, m_outputBlockSize-m_bytePos);

+			m_bytePos = m_outputBlockSize;

+		}

+		FILTER_OUTPUT(2, m_outBuf, m_bytePos, messageEnd);

+		m_bytePos = m_bitPos = 0;

+	}

+	FILTER_END_NO_MESSAGE_END;

+}

+

+void BaseN_Decoder::IsolatedInitialize(const NameValuePairs &parameters)

+{

+	parameters.GetRequiredParameter("BaseN_Decoder", Name::DecodingLookupArray(), m_lookup);

+

+	parameters.GetRequiredIntParameter("BaseN_Decoder", Name::Log2Base(), m_bitsPerChar);

+	if (m_bitsPerChar <= 0 || m_bitsPerChar >= 8)

+		throw InvalidArgument("BaseN_Decoder: Log2Base must be between 1 and 7 inclusive");

+

+	m_bytePos = m_bitPos = 0;

+

+	int i = m_bitsPerChar;

+	while (i%8 != 0)

+		i += m_bitsPerChar;

+	m_outputBlockSize = i/8;

+

+	m_outBuf.New(m_outputBlockSize);

+}

+

+size_t BaseN_Decoder::Put2(const byte *begin, size_t length, int messageEnd, bool blocking)

+{

+	FILTER_BEGIN;

+	while (m_inputPosition < length)

+	{

+		unsigned int value;

+		value = m_lookup[begin[m_inputPosition++]];

+		if (value >= 256)

+			continue;

+

+		if (m_bytePos == 0 && m_bitPos == 0)

+			memset(m_outBuf, 0, m_outputBlockSize);

+

+		{

+			int newBitPos = m_bitPos + m_bitsPerChar;

+			if (newBitPos <= 8)

+				m_outBuf[m_bytePos] |= value << (8-newBitPos);

+			else

+			{

+				m_outBuf[m_bytePos] |= value >> (newBitPos-8);

+				m_outBuf[m_bytePos+1] |= value << (16-newBitPos);

+			}

+

+			m_bitPos = newBitPos;

+			while (m_bitPos >= 8)

+			{

+				m_bitPos -= 8;

+				++m_bytePos;

+			}

+		}

+

+		if (m_bytePos == m_outputBlockSize)

+		{

+			FILTER_OUTPUT(1, m_outBuf, m_outputBlockSize, 0);

+			m_bytePos = m_bitPos = 0;

+		}

+	}

+	if (messageEnd)

+	{

+		FILTER_OUTPUT(2, m_outBuf, m_bytePos, messageEnd);

+		m_bytePos = m_bitPos = 0;

+	}

+	FILTER_END_NO_MESSAGE_END;

+}

+

+void BaseN_Decoder::InitializeDecodingLookupArray(int *lookup, const byte *alphabet, unsigned int base, bool caseInsensitive)

+{

+	std::fill(lookup, lookup+256, -1);

+

+	for (unsigned int i=0; i<base; i++)

+	{

+		if (caseInsensitive && isalpha(alphabet[i]))

+		{

+			assert(lookup[toupper(alphabet[i])] == -1);

+			lookup[toupper(alphabet[i])] = i;

+			assert(lookup[tolower(alphabet[i])] == -1);

+			lookup[tolower(alphabet[i])] = i;

+		}

+		else

+		{

+			assert(lookup[alphabet[i]] == -1);

+			lookup[alphabet[i]] = i;

+		}

+	}

+}

+

+void Grouper::IsolatedInitialize(const NameValuePairs &parameters)

+{

+	m_groupSize = parameters.GetIntValueWithDefault(Name::GroupSize(), 0);

+	ConstByteArrayParameter separator, terminator;

+	if (m_groupSize)

+		parameters.GetRequiredParameter("Grouper", Name::Separator(), separator);

+	else

+		parameters.GetValue(Name::Separator(), separator);

+	parameters.GetValue(Name::Terminator(), terminator);

+

+	m_separator.Assign(separator.begin(), separator.size());

+	m_terminator.Assign(terminator.begin(), terminator.size());

+	m_counter = 0;

+}

+

+size_t Grouper::Put2(const byte *begin, size_t length, int messageEnd, bool blocking)

+{

+	FILTER_BEGIN;

+	if (m_groupSize)

+	{

+		while (m_inputPosition < length)

+		{

+			if (m_counter == m_groupSize)

+			{

+				FILTER_OUTPUT(1, m_separator, m_separator.size(), 0);

+				m_counter = 0;

+			}

+

+			size_t len;

+			FILTER_OUTPUT2(2, len = STDMIN(length-m_inputPosition, m_groupSize-m_counter),

+				begin+m_inputPosition, len, 0);

+			m_inputPosition += len;

+			m_counter += len;

+		}

+	}

+	else

+		FILTER_OUTPUT(3, begin, length, 0);

+

+	if (messageEnd)

+	{

+		FILTER_OUTPUT(4, m_terminator, m_terminator.size(), messageEnd);

+		m_counter = 0;

+	}

+	FILTER_END_NO_MESSAGE_END

+}

+

+NAMESPACE_END

+

+#endif