Added KDE3 version of kvirc

git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/applications/kvirc@1095341 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 853 insertions, 0 deletions

diff --git a/src/modules/rijndael/libkvirijndael.cpp b/src/modules/rijndael/libkvirijndael.cpp
new file mode 100644
index 00000000..0a678437
--- /dev/null
+++ b/src/modules/rijndael/libkvirijndael.cpp
@@ -0,0 +1,853 @@
+//
+//   File : libkvirijndael.cpp
+//   Creation date : Sat Now 4 2000 15:33:12 CEST by Szymon Stefanek
+//
+//   This file is part of the KVirc irc client distribution
+//   Copyright (C) 1999-2000 Till Bush ([email protected])
+//
+//   This program is FREE software. You can redistribute it and/or
+//   modify it under the terms of the GNU General Public License
+//   as published by the Free Software Foundation; either version 2
+//   of the License, or (at your opinion) any later version.
+//
+//   This program is distributed in the HOPE that it will be USEFUL,
+//   but WITHOUT ANY WARRANTY; without even the implied warranty of
+//   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+//   See the GNU General Public License for more details.
+//
+//   You should have received a copy of the GNU General Public License
+//   along with this program. If not, write to the Free Software Foundation,
+//   Inc. ,51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+//
+
+#include "libkvirijndael.h"
+
+#include "rijndael.h"
+
+#include "kvi_module.h"
+#include "kvi_debug.h"
+#include "kvi_locale.h"
+
+#include "kvi_mirccntrl.h"
+#include "kvi_time.h"
+
+//#warning "Other engines: mircStrip koi2win colorizer lamerizer etc.."
+
+/*
+	@doc: rijndael
+	@type:
+		module
+	@short:
+		The Rijndael cryptographic engines
+	@title:
+		The rijndael module
+	@body:
+		The rijndael module exports six [doc:crypt_engines]cryptographic engines[/doc] based
+		on the Advanced Encryptiong Standard algorithm called Rijndael. Rijndael was
+		originally written by Joan Daemen and Vincent Rijmen. The original Rijndael
+		description is available at http://www.esat.kuleuven.ac.be/~rijmen/rijndael/.[br]
+		It is a private key block cipher that has been designed to replace
+		the widely used DES, and it should provide at leas a decent security agains
+		common attacks. Theoretically the best attack that one can perform on this cipher
+		is the "brute force" attack that requires a really massive parallel computation:
+		actually out of the possibilities of a common "hacker".[br]
+		My implementation allows the usage of 128, 192 and 256 bit keys
+		on 128 bit data blocks. The encrypted binary data buffer is then converted
+		into an ascii-string by using the base64 conversion or hex-digit-string rappresentation.
+		The six engines are the six possible combinations of the key lengths and ascii-string
+		conversions.
+*/
+
+
+
+#ifdef COMPILE_CRYPT_SUPPORT
+	
+	#include "kvi_memmove.h"
+	#include "kvi_malloc.h"
+
+	#include "kvi_pointerlist.h"
+
+	static KviPointerList<KviCryptEngine> * g_pEngineList = 0;
+
+
+
+
+	KviRijndaelEngine::KviRijndaelEngine()
+	: KviCryptEngine()
+	{
+		g_pEngineList->append(this);
+		m_pEncryptCipher = 0;
+		m_pDecryptCipher = 0;
+	}
+
+	KviRijndaelEngine::~KviRijndaelEngine()
+	{
+		g_pEngineList->removeRef(this);
+		if(m_pEncryptCipher)delete m_pEncryptCipher;
+		if(m_pDecryptCipher)delete m_pDecryptCipher;
+	}
+
+	bool KviRijndaelEngine::init(const char *encKey,int encKeyLen,const char *decKey,int decKeyLen)
+	{
+		if(m_pEncryptCipher)
+		{
+			delete m_pEncryptCipher;
+			m_pEncryptCipher = 0;
+		}
+		if(m_pDecryptCipher)
+		{
+			delete m_pDecryptCipher;
+			m_pDecryptCipher = 0;
+		}
+
+		if(encKey && (encKeyLen > 0))
+		{
+			if(!(decKey && (decKeyLen > 0)))
+			{
+				decKey = encKey;
+				decKeyLen = encKeyLen;
+			} // else all 
+		} else {
+			// no encrypt key specified...
+			if(decKey && decKeyLen)
+			{
+				encKey = decKey;
+				encKeyLen = decKeyLen;
+			} else {
+				// both keys missing
+				setLastError(__tr("Missing both encrypt and decrypt key: at least one is needed"));
+				return false;
+			}
+		}
+
+		int defLen = getKeyLen();
+
+		char * encryptKey = (char *)kvi_malloc(defLen);
+		char * decryptKey = (char *)kvi_malloc(defLen);
+
+		if(encKeyLen > defLen)encKeyLen = defLen;
+		kvi_memmove(encryptKey,encKey,encKeyLen);
+		if(encKeyLen < defLen)kvi_memset(encryptKey + encKeyLen,'0',defLen - encKeyLen);
+
+		if(decKeyLen > defLen)decKeyLen = defLen;
+		kvi_memmove(decryptKey,decKey,decKeyLen);
+		if(decKeyLen < defLen)kvi_memset(decryptKey + decKeyLen,'0',defLen - decKeyLen);
+
+		m_pEncryptCipher = new Rijndael();
+		int retVal = m_pEncryptCipher->init(Rijndael::CBC,Rijndael::Encrypt,(unsigned char *)encryptKey,getKeyLenId());
+		kvi_free(encryptKey);
+		if(retVal != RIJNDAEL_SUCCESS)
+		{
+			kvi_free(decryptKey);
+			delete m_pEncryptCipher;
+			m_pEncryptCipher = 0;
+			setLastErrorFromRijndaelErrorCode(retVal);
+			return false;
+		}
+
+		m_pDecryptCipher = new Rijndael();
+		retVal = m_pDecryptCipher->init(Rijndael::CBC,Rijndael::Decrypt,(unsigned char *)decryptKey,getKeyLenId());
+		kvi_free(decryptKey);
+		if(retVal != RIJNDAEL_SUCCESS)
+		{
+			delete m_pEncryptCipher;
+			m_pEncryptCipher = 0;
+			delete m_pDecryptCipher;
+			m_pDecryptCipher = 0;
+			setLastErrorFromRijndaelErrorCode(retVal);
+			return false;
+		}
+
+		return true;
+	}
+
+	void KviRijndaelEngine::setLastErrorFromRijndaelErrorCode(int errCode)
+	{
+		switch(errCode)
+		{
+			case RIJNDAEL_SUCCESS: setLastError(__tr("Error 0: Success ?")); break;
+			case RIJNDAEL_UNSUPPORTED_MODE: setLastError(__tr("Unsupported crypt mode")); break;
+			case RIJNDAEL_UNSUPPORTED_DIRECTION: setLastError(__tr("Unsupported direction")); break;
+			case RIJNDAEL_UNSUPPORTED_KEY_LENGTH: setLastError(__tr("Unsupported key length")); break;
+			case RIJNDAEL_BAD_KEY: setLastError(__tr("Bad key data")); break;
+			case RIJNDAEL_NOT_INITIALIZED: setLastError(__tr("Engine not initialized")); break;
+			case RIJNDAEL_BAD_DIRECTION: setLastError(__tr("Invalid direction for this engine")); break;
+			case RIJNDAEL_CORRUPTED_DATA: setLastError(__tr("Corrupted message data or invalid decrypt key")); break;
+			default: setLastError(__tr("Unknown error")); break;
+		}
+	}
+
+	KviCryptEngine::EncryptResult KviRijndaelEngine::encrypt(const char * plainText,KviStr &outBuffer)
+	{
+		if(!m_pEncryptCipher)
+		{
+			setLastError(__tr("Ops...encrypt cipher not initialized"));
+			return KviCryptEngine::EncryptError;
+		}
+		int len = (int)kvi_strLen(plainText);
+		char * buf = (char *)kvi_malloc(len + 16);
+		
+		int retVal = m_pEncryptCipher->padEncrypt((const unsigned char *)plainText,len,(unsigned char *)buf);
+		if(retVal < 0)
+		{
+			kvi_free(buf);
+			setLastErrorFromRijndaelErrorCode(retVal);
+			return KviCryptEngine::EncryptError;
+		}
+
+		if(!binaryToAscii(buf,retVal,outBuffer))
+		{
+			kvi_free(buf);
+			return KviCryptEngine::EncryptError;
+		}
+		kvi_free(buf);
+
+		if(outBuffer.len() > maxEncryptLen())
+		{
+			if(maxEncryptLen() > 0)
+			{
+				setLastError(__tr("Data buffer too long"));
+				return KviCryptEngine::EncryptError;
+			}
+		}
+		outBuffer.prepend(KVI_TEXT_CRYPTESCAPE);
+		return KviCryptEngine::Encrypted;
+	}
+
+	KviCryptEngine::DecryptResult KviRijndaelEngine::decrypt(const char * inBuffer,KviStr &plainText)
+	{
+		if(!m_pDecryptCipher)
+		{
+			setLastError(__tr("Ops...decrypt cipher not initialized"));
+			return KviCryptEngine::DecryptError;
+		}
+
+		if(*inBuffer != KVI_TEXT_CRYPTESCAPE)
+		{
+			plainText = inBuffer;
+			return KviCryptEngine::DecryptOkWasPlainText;
+		}
+
+		inBuffer++;
+		
+		if(!*inBuffer)
+		{
+			plainText = inBuffer;
+			return KviCryptEngine::DecryptOkWasPlainText; // empty buffer
+		}
+
+		int len;
+		char * binary;
+
+		if(!asciiToBinary(inBuffer,&len,&binary))return KviCryptEngine::DecryptError;
+
+		char * buf = (char *)kvi_malloc(len + 1);
+		
+		int retVal = m_pDecryptCipher->padDecrypt((const unsigned char *)binary,len,(unsigned char *)buf);
+		kvi_free(binary);
+
+		if(retVal < 0)
+		{
+			kvi_free(buf);
+			setLastErrorFromRijndaelErrorCode(retVal);
+			return KviCryptEngine::DecryptError;
+		}
+
+		buf[retVal] = '\0';
+
+		plainText = buf;
+
+		kvi_free(buf);
+		return KviCryptEngine::DecryptOkWasEncrypted;
+	}
+
+	bool KviRijndaelHexEngine::binaryToAscii(const char * inBuffer,int len,KviStr &outBuffer)
+	{
+		outBuffer.bufferToHex(inBuffer,len);
+		return true;
+	}
+
+	bool KviRijndaelHexEngine::asciiToBinary(const char * inBuffer,int * len,char ** outBuffer)
+	{
+		KviStr hex(inBuffer);
+		char * tmpBuf;
+		*len = hex.hexToBuffer(&tmpBuf,false);
+		if(*len < 0)
+		{
+			setLastError(__tr("The message is not a hexadecimal string: this is not my stuff"));
+			return false;
+		} else {
+			if(len > 0)
+			{
+				*outBuffer = (char *)kvi_malloc(*len);
+				kvi_memmove(*outBuffer,tmpBuf,*len);
+				KviStr::freeBuffer(tmpBuf);
+			}
+		}
+		return true;
+	}
+
+	bool KviRijndaelBase64Engine::binaryToAscii(const char * inBuffer,int len,KviStr &outBuffer)
+	{
+		outBuffer.bufferToBase64(inBuffer,len);
+		return true;
+	}
+
+	bool KviRijndaelBase64Engine::asciiToBinary(const char * inBuffer,int * len,char ** outBuffer)
+	{
+		KviStr base64(inBuffer);
+		char * tmpBuf;
+		*len = base64.base64ToBuffer(&tmpBuf,false);
+		if(*len < 0)
+		{
+			setLastError(__tr("The message is not a base64 string: this is not my stuff"));
+			return false;
+		} else {
+			if(len > 0)
+			{
+				*outBuffer = (char *)kvi_malloc(*len);
+				kvi_memmove(*outBuffer,tmpBuf,*len);
+				KviStr::freeBuffer(tmpBuf);
+			}
+		}
+		return true;
+	}
+
+	static KviCryptEngine * allocRijndael128HexEngine()
+	{
+		return new KviRijndael128HexEngine();
+	}
+
+	static KviCryptEngine * allocRijndael192HexEngine()
+	{
+		return new KviRijndael192HexEngine();
+	}
+
+	static KviCryptEngine * allocRijndael256HexEngine()
+	{
+		return new KviRijndael256HexEngine();
+	}
+
+	static KviCryptEngine * allocRijndael128Base64Engine()
+	{
+		return new KviRijndael128Base64Engine();
+	}
+
+	static KviCryptEngine * allocRijndael192Base64Engine()
+	{
+		return new KviRijndael192Base64Engine();
+	}
+
+	static KviCryptEngine * allocRijndael256Base64Engine()
+	{
+		return new KviRijndael256Base64Engine();
+	}
+
+	static void deallocRijndaelCryptEngine(KviCryptEngine * e)
+	{
+		delete e;
+	}
+
+
+
+
+
+	// Mircryption stuff
+
+	#include "ablowfish.h"
+
+	KviMircryptionEngine::KviMircryptionEngine()
+	: KviCryptEngine()
+	{
+		g_pEngineList->append(this);
+	}
+	
+	KviMircryptionEngine::~KviMircryptionEngine()
+	{
+		g_pEngineList->removeRef(this);
+	}
+	
+	bool KviMircryptionEngine::init(const char * encKey,int encKeyLen,const char * decKey,int decKeyLen)
+	{
+		if(encKey && (encKeyLen > 0))
+		{
+			if(!(decKey && (decKeyLen > 0)))
+			{
+				decKey = encKey;
+				decKeyLen = encKeyLen;
+			} // else all 
+		} else {
+			// no encrypt key specified...
+			if(decKey && decKeyLen)
+			{
+				encKey = decKey;
+				encKeyLen = decKeyLen;
+			} else {
+				// both keys missing
+				setLastError(__tr("Missing both encrypt and decrypt key: at least one is needed"));
+				return false;
+			}
+		}
+		m_szEncryptKey = KviStr(encKey,encKeyLen);
+		m_szDecryptKey = KviStr(decKey,decKeyLen);
+		if(kvi_strEqualCIN("cbc:",m_szEncryptKey.ptr(),4) && (m_szEncryptKey.len() > 4))
+			m_szEncryptKey.cutLeft(4);
+		else
+			m_bEncryptCBC = false;
+		if(kvi_strEqualCIN("cbc:",m_szDecryptKey.ptr(),4) && (m_szDecryptKey.len() > 4))
+			m_szDecryptKey.cutLeft(4);
+		else
+			m_bDecryptCBC = false;
+		return true;
+	}
+	
+	KviCryptEngine::EncryptResult KviMircryptionEngine::encrypt(const char * plainText,KviStr &outBuffer)
+	{
+		KviStr szPlain = plainText;
+		outBuffer = "";
+		if(m_bEncryptCBC)
+		{
+			if(!doEncryptCBC(szPlain,outBuffer))return KviCryptEngine::EncryptError;
+		} else {
+			if(!doEncryptECB(szPlain,outBuffer))return KviCryptEngine::EncryptError;
+		}
+		outBuffer.prepend("+OK ");
+
+		if(outBuffer.len() > maxEncryptLen())
+		{
+			if(maxEncryptLen() > 0)
+			{
+				setLastError(__tr("Data buffer too long"));
+				return KviCryptEngine::EncryptError;
+			}
+		}
+
+		//outBuffer = MCPS2_STARTTAG;
+		//outBuffer += MCPS2_ENDTAG;
+		return KviCryptEngine::Encrypted;
+	}
+	
+	KviCryptEngine::DecryptResult KviMircryptionEngine::decrypt(const char * inBuffer,KviStr &plainText)
+	{
+		plainText = "";
+		KviStr szIn = inBuffer;
+		// various old versions
+		if(kvi_strEqualCSN(inBuffer,"mcps ",5))
+			szIn.cutLeft(5);
+		else if(kvi_strEqualCSN(inBuffer,"+OK ",4))
+			szIn.cutLeft(4);
+		else {
+			plainText = szIn;
+			return KviCryptEngine::DecryptOkWasPlainText;
+		}
+
+		if(m_bDecryptCBC)return doDecryptCBC(szIn,plainText) ? KviCryptEngine::DecryptOkWasEncrypted : KviCryptEngine::DecryptError;
+		return doDecryptECB(szIn,plainText) ? KviCryptEngine::DecryptOkWasEncrypted : KviCryptEngine::DecryptError;
+
+		/*
+		int len1 = kvi_strLen(MCPS2_STARTTAG);
+		int len2 = kvi_strLen(MCPS2_ENDTAG);
+		while(szIn.len() > 0)
+		{
+			int idx = szIn.findFirstIdx(MCPS2_STARTTAG);
+			if(idx == -1)
+			{
+				// no more encrypted stuff
+				plainText += szIn;
+				return true;
+			}
+			if(idx > 0) // a non encrypted block
+				plainText += szIn.left(idx);
+			szIn.cutLeft(idx + len1);
+			
+			idx = szIn.findFirstIdx(MCPS2_ENDTAG);
+			if(idx != -1)
+			{
+				KviStr toDecrypt = szIn.left(idx);
+				if(!doDecrypt(toDecrypt,plainText))return false;
+			}
+			szIn.cutLeft(idx + len2);
+		}
+		*/
+	}
+	
+	static unsigned char fake_base64[]="./0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
+
+	unsigned int fake_base64dec(unsigned char c)
+	{
+		static char base64unmap[255];
+		static bool didinit=false;
+		int i;
+	
+		if(!didinit)
+		{
+			// initialize base64unmap
+			for (i=0;i<255;++i)base64unmap[i]=0;
+			for (i=0;i<64;++i)base64unmap[fake_base64[i]]=i;
+			didinit=true;
+		}
+
+		return base64unmap[c];
+	}
+	
+	static void byteswap_buffer(unsigned char * p,int len)
+	{
+		while(len > 0)
+		{
+			unsigned char aux = p[0];
+			p[0] = p[3];
+			p[3] = aux;
+			aux = p[1];
+			p[1] = p[2];
+			p[2] = aux;
+			p += 4;
+			len -= 4;
+		}
+	}
+
+	bool KviMircryptionEngine::doEncryptECB(KviStr &plain,KviStr &encoded)
+	{
+		// make sure it is a multiple of 8 bytes (eventually pad with zeroes)
+		if(plain.len() % 8)
+		{
+			int oldL = plain.len();
+			plain.setLength(plain.len() + (8 - (plain.len() % 8)));
+			char * padB = plain.ptr() + oldL;
+			char * padE = plain.ptr() + plain.len();
+			while(padB < padE)*padB++ = 0;
+		}
+
+		//byteswap_buffer((unsigned char *)plain.ptr(),plain.len());
+
+		unsigned char * out =(unsigned char *)kvi_malloc(plain.len()); // we use this to avoid endiannes problems
+		
+		BlowFish bf((unsigned char *)m_szEncryptKey.ptr(),m_szEncryptKey.len());
+		bf.ResetChain();
+		bf.Encrypt((unsigned char *)plain.ptr(),out,plain.len(),BlowFish::ECB);
+
+		// FIXME: this is probably needed only on LittleEndian machines!
+		byteswap_buffer((unsigned char *)out,plain.len());
+
+		// da uglybase64 encoding
+		unsigned char * outb = out;
+		unsigned char * oute = out + plain.len();
+
+		int ll = (plain.len() * 3) / 2;
+		encoded.setLength(ll);
+
+		unsigned char * p = (unsigned char *)encoded.ptr();
+		while(outb < oute)
+		{
+			Q_UINT32 * dd1 = (Q_UINT32 *)outb;
+			outb += 4;
+			Q_UINT32 * dd2 = (Q_UINT32 *)outb;
+			outb += 4;
+			*p++ = fake_base64[*dd2 & 0x3f]; *dd2 >>= 6;
+			*p++ = fake_base64[*dd2 & 0x3f]; *dd2 >>= 6;
+			*p++ = fake_base64[*dd2 & 0x3f]; *dd2 >>= 6;
+			*p++ = fake_base64[*dd2 & 0x3f]; *dd2 >>= 6;
+			*p++ = fake_base64[*dd2 & 0x3f]; *dd2 >>= 6;
+			*p++ = fake_base64[*dd2 & 0x3f];
+			
+			*p++ = fake_base64[*dd1 & 0x3f]; *dd1 >>= 6;
+			*p++ = fake_base64[*dd1 & 0x3f]; *dd1 >>= 6;
+			*p++ = fake_base64[*dd1 & 0x3f]; *dd1 >>= 6;
+			*p++ = fake_base64[*dd1 & 0x3f]; *dd1 >>= 6;
+			*p++ = fake_base64[*dd1 & 0x3f]; *dd1 >>= 6;
+			*p++ = fake_base64[*dd1 & 0x3f];
+		}
+
+		kvi_free(out);
+		return true;
+	}
+
+	bool KviMircryptionEngine::doDecryptECB(KviStr &encoded,KviStr &plain)
+	{
+		// encoded is in this strange base64...
+		// make sure its length is multiple of 12 (eventually pad with zeroes)
+		if(encoded.len() % 12)
+		{
+			int oldL = encoded.len();
+			encoded.setLength(encoded.len() + (12 - (encoded.len() % 12)));
+			char * padB = encoded.ptr() + oldL;
+			char * padE = encoded.ptr() + encoded.len();
+			while(padB < padE)*padB++ = 0;
+		}
+
+		// a fake base64 decoding algo, use a different character set
+		// and stuff 6 bytes at a time into a 32 bit long...
+		int ll = (encoded.len() * 2) / 3;
+		
+		unsigned char * buf = (unsigned char *)kvi_malloc(ll);
+		unsigned char * p = (unsigned char *)encoded.ptr();
+		unsigned char * e = p + encoded.len();
+		int i;
+		unsigned char * bufp = buf;
+		while(p < e)
+		{
+			Q_UINT32 * dw1 = (Q_UINT32 *)bufp;
+			bufp += 4;
+			Q_UINT32 * dw2 = (Q_UINT32 *)bufp;
+			bufp += 4;
+			*dw2 = 0;
+			for(i=0;i < 6;i++)*dw2 |= (fake_base64dec(*p++)) << (i * 6);
+			*dw1 = 0;
+			for(i=0;i < 6;i++)*dw1 |= (fake_base64dec(*p++)) << (i * 6);
+		}
+
+		// FIXME: this is probably needed only on LittleEndian machines!
+		byteswap_buffer((unsigned char *)buf,ll);
+
+		plain.setLength(ll);
+		BlowFish bf((unsigned char *)m_szDecryptKey.ptr(),m_szDecryptKey.len());
+		bf.ResetChain();
+		bf.Decrypt(buf,(unsigned char *)plain.ptr(),ll,BlowFish::ECB);
+
+		//byteswap_buffer((unsigned char *)plain.ptr(),ll);
+
+		kvi_free(buf);
+
+		return true;
+	}
+
+	bool KviMircryptionEngine::doEncryptCBC(KviStr &plain,KviStr &encoded)
+	{
+		// make sure it is a multiple of 8 bytes (eventually pad with zeroes)
+		if(plain.len() % 8)
+		{
+			int oldL = plain.len();
+			plain.setLength(plain.len() + (8 - (plain.len() % 8)));
+			char * padB = plain.ptr() + oldL;
+			char * padE = plain.ptr() + plain.len();
+			while(padB < padE)*padB++ = 0;
+		}
+
+		int ll = plain.len() + 8;
+		unsigned char * in = (unsigned char *)kvi_malloc(ll);
+
+		// choose an IV
+		static bool bDidInit = false;
+		
+		int t = (int)kvi_unixTime();
+		
+		if(!bDidInit)
+		{
+			srand(t);
+			bDidInit = true;
+		}
+
+		for(int i=0;i<8;i++)in[i] = (unsigned char)(rand() % 256);
+
+		kvi_fastmove(in+8,plain.ptr(),plain.len());
+
+		// encrypt
+		unsigned char * out = (unsigned char *)kvi_malloc(ll);
+		BlowFish bf((unsigned char *)m_szEncryptKey.ptr(),m_szEncryptKey.len());
+		bf.ResetChain();
+		bf.Encrypt(in,out,ll,BlowFish::CBC);
+		kvi_free(in);
+
+		encoded.bufferToBase64((const char *)out,ll);
+		kvi_free(out);
+
+		encoded.prepend('*'); // prepend the signature
+
+		return true;
+	}
+
+	bool KviMircryptionEngine::doDecryptCBC(KviStr &encoded,KviStr &plain)
+	{
+		if(*(encoded.ptr()) != '*')
+		{
+			debug("WARNING: Specified a CBC key but the incoming message doesn't seem to be a CBC one");
+			return doDecryptECB(encoded,plain);
+		}
+		encoded.cutLeft(1);
+
+		char * tmpBuf;
+		int len = encoded.base64ToBuffer(&tmpBuf,false);
+		if(len < 0)
+		{
+			setLastError(__tr("The message is not a base64 string: this is not my stuff"));
+			return false;
+		}
+		if((len < 8) || (len % 8))
+		{
+			setLastError(__tr("The message doesn't seem to be encoded with CBC Mircryption"));
+			if(len > 0)KviStr::freeBuffer(tmpBuf);
+			return false;
+		}
+
+		plain.setLength(len);
+		BlowFish bf((unsigned char *)m_szDecryptKey.ptr(),m_szDecryptKey.len());
+		bf.ResetChain();
+		bf.Decrypt((unsigned char *)tmpBuf,(unsigned char *)plain.ptr(),len,BlowFish::CBC);
+
+		// kill the first 8 bytes (random IV)
+		plain.cutLeft(8);
+
+		KviStr::freeBuffer(tmpBuf);
+
+		return true;
+	}
+
+
+	static KviCryptEngine * allocMircryptionEngine()
+	{
+		return new KviMircryptionEngine();
+	}
+
+#endif
+
+
+// =======================================
+// module routines
+// =======================================
+static bool rijndael_module_init(KviModule * m)
+{
+#ifdef COMPILE_CRYPT_SUPPORT
+	g_pEngineList = new KviPointerList<KviCryptEngine>;
+	g_pEngineList->setAutoDelete(false);
+
+	KviStr format = __tr("Cryptographic engine based on the\n" \
+		"Advanced Encryption Standard (AES)\n" \
+		"algorithm called Rijndael.\n" \
+		"The text is first encrypted with rijndael\n" \
+		"and then converted to %s notation.\n" \
+		"The keys used are %d bit long and will be padded\n" \
+		"with zeros if you provide shorter ones.\n" \
+		"If only one key is provided, this engine\n" \
+		"will use it for both encrypting and decrypting.\n" \
+		"See the rijndael module documentation\n" \
+		"for more info on the algorithm used.\n");
+
+	// FIXME: Maybe convert this repeated code to a function eh ?
+
+	KviCryptEngineDescription * d = new KviCryptEngineDescription;
+	d->szName = "Rijndael128Hex";
+	d->szAuthor = "Szymon Stefanek";
+	d->szDescription.sprintf(format.ptr(),__tr("hexadecimal"),128);
+	d->iFlags = KVI_CRYPTENGINE_CAN_ENCRYPT | KVI_CRYPTENGINE_CAN_DECRYPT |
+			KVI_CRYPTENGINE_WANT_ENCRYPT_KEY | KVI_CRYPTENGINE_WANT_DECRYPT_KEY;
+	d->allocFunc = allocRijndael128HexEngine;
+	d->deallocFunc = deallocRijndaelCryptEngine;
+	m->registerCryptEngine(d);
+
+	d = new KviCryptEngineDescription;
+	d->szName = "Rijndael192Hex";
+	d->szAuthor = "Szymon Stefanek";
+	d->szDescription.sprintf(format.ptr(),__tr("hexadecimal"),192);
+	d->iFlags = KVI_CRYPTENGINE_CAN_ENCRYPT | KVI_CRYPTENGINE_CAN_DECRYPT |
+			KVI_CRYPTENGINE_WANT_ENCRYPT_KEY | KVI_CRYPTENGINE_WANT_DECRYPT_KEY;
+	d->allocFunc = allocRijndael192HexEngine;
+	d->deallocFunc = deallocRijndaelCryptEngine;
+	m->registerCryptEngine(d);
+
+	d = new KviCryptEngineDescription;
+	d->szName = "Rijndael256Hex";
+	d->szAuthor = "Szymon Stefanek";
+	d->szDescription.sprintf(format.ptr(),__tr("hexadecimal"),256);
+	d->iFlags = KVI_CRYPTENGINE_CAN_ENCRYPT | KVI_CRYPTENGINE_CAN_DECRYPT |
+			KVI_CRYPTENGINE_WANT_ENCRYPT_KEY | KVI_CRYPTENGINE_WANT_DECRYPT_KEY;
+	d->allocFunc = allocRijndael256HexEngine;
+	d->deallocFunc = deallocRijndaelCryptEngine;
+	m->registerCryptEngine(d);
+
+	d = new KviCryptEngineDescription;
+	d->szName = "Rijndael128Base64";
+	d->szAuthor = "Szymon Stefanek";
+	d->szDescription.sprintf(format.ptr(),__tr("base64"),128);
+	d->iFlags = KVI_CRYPTENGINE_CAN_ENCRYPT | KVI_CRYPTENGINE_CAN_DECRYPT |
+			KVI_CRYPTENGINE_WANT_ENCRYPT_KEY | KVI_CRYPTENGINE_WANT_DECRYPT_KEY;
+	d->allocFunc = allocRijndael128Base64Engine;
+	d->deallocFunc = deallocRijndaelCryptEngine;
+	m->registerCryptEngine(d);
+
+	d = new KviCryptEngineDescription;
+	d->szName = "Rijndael192Base64";
+	d->szAuthor = "Szymon Stefanek";
+	d->szDescription.sprintf(format.ptr(),__tr("base64"),192);
+	d->iFlags = KVI_CRYPTENGINE_CAN_ENCRYPT | KVI_CRYPTENGINE_CAN_DECRYPT |
+			KVI_CRYPTENGINE_WANT_ENCRYPT_KEY | KVI_CRYPTENGINE_WANT_DECRYPT_KEY;
+	d->allocFunc = allocRijndael192Base64Engine;
+	d->deallocFunc = deallocRijndaelCryptEngine;
+	m->registerCryptEngine(d);
+
+	d = new KviCryptEngineDescription;
+	d->szName = "Rijndael256Base64";
+	d->szAuthor = "Szymon Stefanek";
+	d->szDescription.sprintf(format.ptr(),__tr("base64"),256);
+	d->iFlags = KVI_CRYPTENGINE_CAN_ENCRYPT | KVI_CRYPTENGINE_CAN_DECRYPT |
+			KVI_CRYPTENGINE_WANT_ENCRYPT_KEY | KVI_CRYPTENGINE_WANT_DECRYPT_KEY;
+	d->allocFunc = allocRijndael256Base64Engine;
+	d->deallocFunc = deallocRijndaelCryptEngine;
+	m->registerCryptEngine(d);
+
+
+	d = new KviCryptEngineDescription;
+	d->szName = "Mircryption";
+	d->szAuthor = "Szymon Stefanek";
+	d->szDescription = __tr("Popular cryptographic engine based on the\n" \
+		"old Blowfish encryption algorithm.\n" \
+		"The text is first encrypted with Blowfish \n" \
+		"and then converted to base64 notation.\n" \
+		"The keys used have variable length and\n" \
+		"are specified as character strings.\n" \
+		"You can specify keys long up to 56 bytes (448 bits).\n" \
+		"If only one key is provided, this engine\n" \
+		"will use it for both encrypting and decrypting.\n" \
+		"This engine works in ECB mode by default:\n" \
+		"if you want to use CBC mode you must prefix\n" \
+		"your key(s) with \"cbc:\".\n");
+	d->iFlags = KVI_CRYPTENGINE_CAN_ENCRYPT | KVI_CRYPTENGINE_CAN_DECRYPT |
+			KVI_CRYPTENGINE_WANT_ENCRYPT_KEY | KVI_CRYPTENGINE_WANT_DECRYPT_KEY;
+	d->allocFunc = allocMircryptionEngine;
+	d->deallocFunc = deallocRijndaelCryptEngine;
+	m->registerCryptEngine(d);
+
+
+	return true;
+#else
+	return false;
+#endif
+}
+
+static bool rijndael_module_cleanup(KviModule *m)
+{
+#ifdef COMPILE_CRYPT_SUPPORT
+	while(g_pEngineList->first())delete g_pEngineList->first();
+	delete g_pEngineList;
+	g_pEngineList = 0;
+	m->unregisterCryptEngines();
+	return true;
+#else
+	return false;
+#endif
+}
+
+static bool rijndael_module_can_unload(KviModule *)
+{
+#ifdef COMPILE_CRYPT_SUPPORT
+	return g_pEngineList->isEmpty();
+#else
+	return true;
+#endif
+}
+
+// =======================================
+// plugin definition structure
+// =======================================
+KVIRC_MODULE(
+	"Rijndael crypt engine",
+	"1.0.0",
+	"Szymon Stefanek <pragma at kvirc dot net>" ,
+	"Exports the rijndael crypt engine",
+	rijndael_module_init ,
+	rijndael_module_can_unload,
+	0,
+	rijndael_module_cleanup
+)
+
+#ifdef COMPILE_CRYPT_SUPPORT
+	#include "libkvirijndael.moc"
+#endif