--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/cryptoservices/certificateandkeymgmt/asn1/utctimedec.cpp	Wed Jul 08 11:25:26 2009 +0100
@@ -0,0 +1,137 @@
+/*
+* Copyright (c) 1998-2009 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of the License "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: 
+* This file contains the implementation of the UTC time ASN1 object.
+* At this moment in time this class will only deal with Zulu times and 
+* doesn't have any kind of handling for time offsets. This is not going to be 
+* a problem for certificate implementations as the PKIX (RFC2459) profile
+* defines that certificate validity periods are specified as Zulu times.
+* Points that need updating if handling for offsets are marked with __OFFSET__
+*
+*/
+
+
+#include <asn1dec.h>
+
+EXPORT_C TASN1DecUTCTime::TASN1DecUTCTime()
+	{
+	}
+
+
+TTime TASN1DecUTCTime::GetTimeL(const TDesC8& aSource)
+
+	{
+	// __OFFSET__ Extract corrected time to include offset too.
+
+	// Did this checking ought to be done on creation rather than when we attempt to get the result?
+	// YES!
+
+	// I guess we ought to check that the contents we've got are long enough to contain a time!
+	if (aSource.Length()<11)
+		{
+		User::Leave(KErrArgument);
+		}
+
+	// Check all digits the main bit of time are valid - this doesn't check the seconds or offset
+	TInt i;
+	for (i=0;i<10;i++)
+		{
+		TUint8 j;
+		j=(TUint8)(aSource[i]-'0');
+		if (j>=10)
+			{
+			User::Leave(KErrArgument);
+			}
+		}
+	// Uh-oh, looks like we're going to have to pull each bit manually and pop it in a TDateTime thing
+	TInt Year,Month,Day,Hour,Minute,Second=0;		// Only set seconds to zero 'cos they are optional, everything else is going to be set
+	Year=(aSource[0]-'0')*10+aSource[1]-'0';
+	Year+=(Year<50)?2000:1900;						//  collection to fit with PKIX UTC/Generalised time rollover at 2049/2050
+	Month=(aSource[2]-'0')*10+aSource[3]-'0';
+	Month--;										// Because the enum for months starts at 0 not 1
+	Day=((aSource[4]-'0')*10+aSource[5]-'0') -1;//added -1 for offset from zero(!)
+	Hour=(aSource[6]-'0')*10+aSource[7]-'0';
+	Minute=(aSource[8]-'0')*10+aSource[9]-'0';
+	TInt Pos=10;
+
+	if (aSource.Length()>11)
+		{
+		if ((aSource[Pos]>='0')&&(aSource[Pos]<='9'))
+			{
+			// seconds
+			Second=(aSource[Pos++]-'0')*10;
+			Second += aSource[Pos++]-'0';
+			}
+		}
+	if (aSource.Length()>Pos)
+		{
+		switch (aSource[Pos])
+			{
+		case 'Z':
+			// Zulu - nothing more to do
+			break;
+		case '+':
+		case '-':
+			// __OFFSET__ Extract corrected time to include offset too.
+		    User::Leave(KErrNotSupported);
+		    break;
+		default:
+			// Error!
+			User::Leave(KErrArgument);
+			break;
+			}
+		}
+	else
+		{
+		User::Leave(KErrArgument);
+		}
+
+	if (Month<EJanuary || Month>EDecember)
+		{
+		User::Leave(KErrArgument);
+		}
+	TMonth month = (TMonth)Month;
+
+	if (	(Day<0 || Day>=Time::DaysInMonth(Year,month))	||
+			(Hour<0 || Hour>=24)	||
+			(Minute<0 || Minute>=60)	||
+			(Second<0 || Second>=60)	)
+		{
+		User::Leave(KErrArgument);
+		}
+
+	TDateTime D(Year,month,Day,Hour,Minute,Second,0);
+	
+	TTime T(D);
+	return T;
+	}
+
+// __OFFSET__ Add GetOffset() method
+
+EXPORT_C TTime TASN1DecUTCTime::DecodeDERL(const TDesC8& aSource,TInt& aPos)
+
+	{
+	TPtrC8 Source=aSource.Mid(aPos);
+	TASN1DecGeneric gen(Source);
+	gen.InitL();
+	TTime t = GetTimeL(gen.GetContentDER());
+	aPos+=gen.LengthDER();
+	return t;
+	}
+
+EXPORT_C TTime TASN1DecUTCTime::DecodeDERL(const TASN1DecGeneric& aGen)
+
+	{
+	return GetTimeL(aGen.GetContentDER());
+	}