1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/os/security/cryptoservices/certificateandkeymgmt/asn1/genericdec.cpp	Fri Jun 15 03:10:57 2012 +0200
     1.3 @@ -0,0 +1,148 @@
     1.4 +/*
     1.5 +* Copyright (c) 1998-2009 Nokia Corporation and/or its subsidiary(-ies).
     1.6 +* All rights reserved.
     1.7 +* This component and the accompanying materials are made available
     1.8 +* under the terms of the License "Eclipse Public License v1.0"
     1.9 +* which accompanies this distribution, and is available
    1.10 +* at the URL "http://www.eclipse.org/legal/epl-v10.html".
    1.11 +*
    1.12 +* Initial Contributors:
    1.13 +* Nokia Corporation - initial contribution.
    1.14 +*
    1.15 +* Contributors:
    1.16 +*
    1.17 +* Description: 
    1.18 +*
    1.19 +*/
    1.20 +
    1.21 +
    1.22 +#include "asn1dec.h"
    1.23 +
    1.24 +EXPORT_C TASN1DecGeneric::TASN1DecGeneric(const TDesC8& aSource):
    1.25 + iEncoding(aSource)
    1.26 +	{
    1.27 +	}
    1.28 +
    1.29 +EXPORT_C void TASN1DecGeneric::InitL()
    1.30 +
    1.31 +// x209 6.2, 6.3
    1.32 +	{
    1.33 +	if(iEncoding.Length() < KASN1ObjectMinLength)
    1.34 +		{
    1.35 +		User::Leave(KErrArgument);
    1.36 +		}	
    1.37 +	
    1.38 +	TInt i=iEncoding[0];
    1.39 +	TInt b=i>>6;
    1.40 +	iClass=(TASN1Class)b;
    1.41 +
    1.42 +	TInt Length=0;
    1.43 +	TInt LengthOfLength=1;
    1.44 +	TInt Pos=0;
    1.45 +	TInt T=0;
    1.46 +	TInt encodingLength = iEncoding.Length();
    1.47 +	// work out tag 
    1.48 +	if ((iEncoding[Pos]&0x1f)==0x1f)
    1.49 +		{
    1.50 +		// tag greater than 30
    1.51 +		Pos++;
    1.52 +		if (encodingLength <= Pos+1)
    1.53 +			{
    1.54 +			User::Leave(KErrArgument);
    1.55 +			}
    1.56 +		while (iEncoding[Pos]>=128)
    1.57 +			{
    1.58 +			T<<=7;
    1.59 +			T+=(TUint8)(iEncoding[Pos]&127);		// this raises warning if TTagType is TUint8
    1.60 +			Pos++;
    1.61 +			if (encodingLength <= Pos+1)
    1.62 +				{
    1.63 +				User::Leave(KErrArgument);
    1.64 +				}
    1.65 +			}
    1.66 +		T<<=7;
    1.67 +		T+=(TUint8)iEncoding[Pos];
    1.68 +		}
    1.69 +	else
    1.70 +		{
    1.71 +		T=(TUint8)(iEncoding[Pos]&0x1f);
    1.72 +		}
    1.73 +	iExplicitTag = T;
    1.74 +	Pos++;
    1.75 +
    1.76 +	TUint8 l = iEncoding[Pos];
    1.77 +	if (l > 128)
    1.78 +		{
    1.79 +		// this is a length of length
    1.80 +		if (encodingLength <= Pos+1)
    1.81 +			{
    1.82 +			User::Leave(KErrArgument);
    1.83 +			}
    1.84 +		LengthOfLength=iEncoding[Pos++]&127;
    1.85 +		Length=0;
    1.86 +		while (LengthOfLength)
    1.87 +			{
    1.88 +			if (encodingLength <= Pos+1)
    1.89 +				{
    1.90 +				User::Leave(KErrArgument);
    1.91 +				}
    1.92 +			Length<<=8;
    1.93 +			Length+=iEncoding[Pos++];
    1.94 +			LengthOfLength--;
    1.95 +			}
    1.96 +		}
    1.97 +	if (l == 128)
    1.98 +		{
    1.99 +		//this is constructed, indefinite length: we don't support this
   1.100 +		User::Leave(KErrNotSupported);
   1.101 +		}
   1.102 +	if (l < 128)
   1.103 +		{
   1.104 +		//this is a straight length
   1.105 +		Length = iEncoding[Pos++];
   1.106 +		}
   1.107 +	if (((Length+Pos)>encodingLength) || (Length < 0))
   1.108 +		{
   1.109 +		User::Leave(KErrArgument);
   1.110 +		}
   1.111 +	iStartOfContents = Pos;
   1.112 +	iLength = Length;
   1.113 +	}
   1.114 +
   1.115 +EXPORT_C TPtrC8 TASN1DecGeneric::GetContentDER(void) const
   1.116 +	{
   1.117 +	return iEncoding.Mid(iStartOfContents, iLength);
   1.118 +	}
   1.119 +
   1.120 +EXPORT_C TInt TASN1DecGeneric::LengthDER(void) const
   1.121 +	{
   1.122 +	return iLength+iStartOfContents;
   1.123 +	}
   1.124 +
   1.125 +EXPORT_C TInt TASN1DecGeneric::LengthDERContent(void) const
   1.126 +	{
   1.127 +	return iLength;
   1.128 +	}
   1.129 +
   1.130 +EXPORT_C TInt TASN1DecGeneric::LengthDERHeader() const
   1.131 +	{
   1.132 +	return LengthDER() - LengthDERContent();
   1.133 +	}
   1.134 +
   1.135 +EXPORT_C TPtrC8 TASN1DecGeneric::Encoding() const
   1.136 +	{
   1.137 +	return iEncoding.Left(LengthDER());
   1.138 +	}
   1.139 +
   1.140 +EXPORT_C TTagType TASN1DecGeneric::Tag() const
   1.141 +// we can inline this
   1.142 +	{
   1.143 +	return iExplicitTag;
   1.144 +	}
   1.145 +
   1.146 +EXPORT_C TASN1Class TASN1DecGeneric::Class() const
   1.147 +// we can inline this
   1.148 +	{
   1.149 +	return iClass;
   1.150 +	}
   1.151 +