--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vpnengine/utlbase64/src/base64.cpp	Thu Dec 17 09:14:51 2009 +0200
@@ -0,0 +1,221 @@
+/*
+* Copyright (c) 2006 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description: Base64 encoder/decoder
+*
+*/
+
+
+
+#include <eikenv.h>
+#include "base64.h"
+
+////////////////////////////////////////////////////////////////////////////////////////
+//	Constructor
+////////////////////////////////////////////////////////////////////////////////////////
+EXPORT_C TBase64Codec::TBase64Codec()
+{
+	// Initialize base64
+	InitBase64();
+}
+
+////////////////////////////////////////////////////////////////////////////////////////
+//	Initialize decoding array
+////////////////////////////////////////////////////////////////////////////////////////
+void TBase64Codec::InitBase64(void)
+{
+	TUint8 i;
+	Mem::Fill(iD64, sizeof(iD64), B64_IGN);
+	for (i=0;i<sizeof(Kb64);i++)
+	{
+		iD64[Kb64[i]]=i;
+	}
+	iD64[B64_NOP_CHR]=B64_NOP_VAL;
+}
+
+////////////////////////////////////////////////////////////////////////////////////////
+//	Base64 encoding function using buffers allocated by the caller
+////////////////////////////////////////////////////////////////////////////////////////
+EXPORT_C TInt TBase64Codec::Base64Encode(const TDesC8 &aRawData, const TDes8 &aEncodedData)
+{
+	TInt i;
+	TInt j;
+	TInt datalen;
+	TUint8 block[3];
+	const TUint8 *fromPtr;
+	TUint8 *toPtr;
+	TUint count = 0;
+	TInt lengthIncludingLinebreaks;
+	TInt lengthWithoutLinebreaks;
+
+
+	i=0;
+	fromPtr = aRawData.Ptr();
+	toPtr = CONST_CAST(TUint8*, aEncodedData.Ptr());
+	datalen = aRawData.Size();
+	lengthWithoutLinebreaks = ((datalen + 3)/ 3) * 4;
+	lengthIncludingLinebreaks = lengthWithoutLinebreaks + (lengthWithoutLinebreaks) / MAXLINELEN - ((lengthWithoutLinebreaks % MAXLINELEN)?0:1); 
+	if(aEncodedData.MaxLength() < lengthIncludingLinebreaks)
+		return KErrArgument;
+
+	for (j=0;j<datalen;j+=3)
+	{
+		/* 11111100>>2 */
+		/* 00000011<<4 + 11110000>>4 */
+		/*               00001111<<2 + 11000000>>6 */
+		/*                             00111111    */
+		Mem::FillZ(block, 3);
+		Mem::Copy(block, &fromPtr[j], datalen-j<3?datalen-j:3);
+		toPtr[i++] = Kb64[(block[0]&0xfc)>>2]; 
+		toPtr[i++] = Kb64[((block[0]&0x03)<<4)+(block[1]>>4)];
+		if (datalen-j>1)
+		{
+			toPtr[i++] = Kb64[((block[1]&0x0f)<<2)+(block[2]>>6)]; 
+		}
+		else
+		{
+			toPtr[i++] = B64_NOP_CHR;
+		}
+		if (datalen-j>2)
+		{
+			toPtr[i++]=Kb64[block[2]&0x3f]; 
+		}
+		else
+		{
+			toPtr[i++] = B64_NOP_CHR;
+		}
+		count += 4;
+		// Add linebreaks every 76th characters
+		// Don't add it after the last full length line
+		if(count >= MAXLINELEN && j < datalen - 3)
+		{
+			toPtr[i++] = B64_LINEBREAK;
+			count = 0;
+		}
+	}
+	
+	CONST_CAST(TDes8 &, aEncodedData).SetLength(i);
+	return KErrNone;
+}
+
+////////////////////////////////////////////////////////////////////////////////////////
+//	Base64 decoding function using buffers allocated by the caller
+////////////////////////////////////////////////////////////////////////////////////////
+EXPORT_C TInt TBase64Codec::Base64Decode(const TDesC8 &aEncodedData, const TDes8 &aDecodedData)
+{
+	TInt i;
+	TInt j;
+	TInt k;
+	TInt blocklen;
+	TInt datalen;
+	const TUint8 *fromPtr;
+	TUint8 *toPtr;
+	
+	TUint8 c = 0;
+	TUint8 block[4];
+
+	InitBase64();
+	
+	i=0;
+	j=0;
+	fromPtr = aEncodedData.Ptr();
+	toPtr = CONST_CAST(TUint8*, aDecodedData.Ptr());
+	datalen = aEncodedData.Size();
+	if(aDecodedData.MaxLength() < (datalen / 4) * 3)
+		return KErrArgument;
+	
+	while ((datalen > 0) && (j <= datalen))
+	{
+		blocklen=0;
+		Mem::Fill(block,'\0',sizeof(block));
+		for (k=0;k<4;k++) /* skip non base64 characters */
+		{
+			while (j++ <= datalen && (c=iD64[*fromPtr++])==B64_IGN) {;}
+			if (j<=datalen)
+			{
+				block[k]=c;
+				if (c!=B64_NOP_VAL)
+				{
+					blocklen++;
+				}
+				else
+				{
+					block[k]=0;
+				}
+			}
+			else
+			{
+				block[k]=0;
+			}
+		}
+		if (blocklen)
+		{
+			toPtr[i+0] = STATIC_CAST(TUint8, (block[0]<<2) + (block[1]>>4));
+
+			if(blocklen > 1)
+				toPtr[i+1] = STATIC_CAST(TUint8, ((block[1]&0x0f)<<4) + (block[2]>>2));
+
+			if(blocklen > 2)
+				toPtr[i+2] = STATIC_CAST(TUint8, ((block[2]&0x03)<<6) + (block[3]));
+
+			i+=blocklen-1;
+		}
+	}
+	CONST_CAST(TDes8 &, aDecodedData).SetLength(i);
+	return KErrNone;
+}
+
+////////////////////////////////////////////////////////////////////////////////////////
+//	Base64 encoding function, buffer allocated by the function and returned to the caller
+////////////////////////////////////////////////////////////////////////////////////////
+EXPORT_C HBufC8* TBase64Codec::Base64EncodeLC(const TDesC8 &aRawData)
+{
+	HBufC8 *outBuf = NULL;
+	TInt rCode;
+	TUint lengthIncludingLinebreaks;
+	TUint lengthWithoutLinebreaks;
+
+	lengthWithoutLinebreaks =((aRawData.Length() + 3)/ 3) * 4;
+	lengthIncludingLinebreaks = lengthWithoutLinebreaks + (lengthWithoutLinebreaks) / MAXLINELEN - ((lengthWithoutLinebreaks % MAXLINELEN)?0:1); 
+	outBuf = HBufC8::NewLC(lengthIncludingLinebreaks);
+	TPtr8 outDes = outBuf->Des();
+	rCode = Base64Encode(aRawData, outDes);
+	if(rCode != KErrNone)
+	{
+		CleanupStack::Pop();
+		delete outBuf;
+		outBuf = NULL;
+	}
+	return (outBuf);
+}
+
+////////////////////////////////////////////////////////////////////////////////////////
+//	Base64 decoding function, buffer allocated by the function and returned to the caller
+////////////////////////////////////////////////////////////////////////////////////////
+EXPORT_C HBufC8* TBase64Codec::Base64DecodeLC(const TDesC8 &aEncodedData)
+{
+	HBufC8 *outBuf = NULL;
+	TInt rCode;
+	
+	outBuf = HBufC8::NewLC(((aEncodedData.Length() / 4) * 3));
+	TPtr8 outDes = outBuf->Des();
+	rCode = Base64Decode(aEncodedData, outDes);
+	if(rCode != KErrNone)
+	{
+		CleanupStack::Pop();
+		delete outBuf;
+		outBuf = NULL;
+	}
+	return (outBuf);
+}
+