sl@0: /*
sl@0: * Copyright (c) 1998-2009 Nokia Corporation and/or its subsidiary(-ies).
sl@0: * All rights reserved.
sl@0: * This component and the accompanying materials are made available
sl@0: * under the terms of the License "Eclipse Public License v1.0"
sl@0: * which accompanies this distribution, and is available
sl@0: * at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0: *
sl@0: * Initial Contributors:
sl@0: * Nokia Corporation - initial contribution.
sl@0: *
sl@0: * Contributors:
sl@0: *
sl@0: * Description: 
sl@0: * This file contains the implementation of the UTC time ASN1 object.
sl@0: * At this moment in time this class will only deal with Zulu times and 
sl@0: * doesn't have any kind of handling for time offsets. This is not going to be 
sl@0: * a problem for certificate implementations as the PKIX (RFC2459) profile
sl@0: * defines that certificate validity periods are specified as Zulu times.
sl@0: * Points that need updating if handling for offsets are marked with __OFFSET__
sl@0: *
sl@0: */
sl@0: 
sl@0: 
sl@0: #include <asn1dec.h>
sl@0: 
sl@0: EXPORT_C TASN1DecUTCTime::TASN1DecUTCTime()
sl@0: 	{
sl@0: 	}
sl@0: 
sl@0: 
sl@0: TTime TASN1DecUTCTime::GetTimeL(const TDesC8& aSource)
sl@0: 
sl@0: 	{
sl@0: 	// __OFFSET__ Extract corrected time to include offset too.
sl@0: 
sl@0: 	// Did this checking ought to be done on creation rather than when we attempt to get the result?
sl@0: 	// YES!
sl@0: 
sl@0: 	// I guess we ought to check that the contents we've got are long enough to contain a time!
sl@0: 	if (aSource.Length()<11)
sl@0: 		{
sl@0: 		User::Leave(KErrArgument);
sl@0: 		}
sl@0: 
sl@0: 	// Check all digits the main bit of time are valid - this doesn't check the seconds or offset
sl@0: 	TInt i;
sl@0: 	for (i=0;i<10;i++)
sl@0: 		{
sl@0: 		TUint8 j;
sl@0: 		j=(TUint8)(aSource[i]-'0');
sl@0: 		if (j>=10)
sl@0: 			{
sl@0: 			User::Leave(KErrArgument);
sl@0: 			}
sl@0: 		}
sl@0: 	// Uh-oh, looks like we're going to have to pull each bit manually and pop it in a TDateTime thing
sl@0: 	TInt Year,Month,Day,Hour,Minute,Second=0;		// Only set seconds to zero 'cos they are optional, everything else is going to be set
sl@0: 	Year=(aSource[0]-'0')*10+aSource[1]-'0';
sl@0: 	Year+=(Year<50)?2000:1900;						//  collection to fit with PKIX UTC/Generalised time rollover at 2049/2050
sl@0: 	Month=(aSource[2]-'0')*10+aSource[3]-'0';
sl@0: 	Month--;										// Because the enum for months starts at 0 not 1
sl@0: 	Day=((aSource[4]-'0')*10+aSource[5]-'0') -1;//added -1 for offset from zero(!)
sl@0: 	Hour=(aSource[6]-'0')*10+aSource[7]-'0';
sl@0: 	Minute=(aSource[8]-'0')*10+aSource[9]-'0';
sl@0: 	TInt Pos=10;
sl@0: 
sl@0: 	if (aSource.Length()>11)
sl@0: 		{
sl@0: 		if ((aSource[Pos]>='0')&&(aSource[Pos]<='9'))
sl@0: 			{
sl@0: 			// seconds
sl@0: 			Second=(aSource[Pos++]-'0')*10;
sl@0: 			Second += aSource[Pos++]-'0';
sl@0: 			}
sl@0: 		}
sl@0: 	if (aSource.Length()>Pos)
sl@0: 		{
sl@0: 		switch (aSource[Pos])
sl@0: 			{
sl@0: 		case 'Z':
sl@0: 			// Zulu - nothing more to do
sl@0: 			break;
sl@0: 		case '+':
sl@0: 		case '-':
sl@0: 			// __OFFSET__ Extract corrected time to include offset too.
sl@0: 		    User::Leave(KErrNotSupported);
sl@0: 		    break;
sl@0: 		default:
sl@0: 			// Error!
sl@0: 			User::Leave(KErrArgument);
sl@0: 			break;
sl@0: 			}
sl@0: 		}
sl@0: 	else
sl@0: 		{
sl@0: 		User::Leave(KErrArgument);
sl@0: 		}
sl@0: 
sl@0: 	if (Month<EJanuary || Month>EDecember)
sl@0: 		{
sl@0: 		User::Leave(KErrArgument);
sl@0: 		}
sl@0: 	TMonth month = (TMonth)Month;
sl@0: 
sl@0: 	if (	(Day<0 || Day>=Time::DaysInMonth(Year,month))	||
sl@0: 			(Hour<0 || Hour>=24)	||
sl@0: 			(Minute<0 || Minute>=60)	||
sl@0: 			(Second<0 || Second>=60)	)
sl@0: 		{
sl@0: 		User::Leave(KErrArgument);
sl@0: 		}
sl@0: 
sl@0: 	TDateTime D(Year,month,Day,Hour,Minute,Second,0);
sl@0: 	
sl@0: 	TTime T(D);
sl@0: 	return T;
sl@0: 	}
sl@0: 
sl@0: // __OFFSET__ Add GetOffset() method
sl@0: 
sl@0: EXPORT_C TTime TASN1DecUTCTime::DecodeDERL(const TDesC8& aSource,TInt& aPos)
sl@0: 
sl@0: 	{
sl@0: 	TPtrC8 Source=aSource.Mid(aPos);
sl@0: 	TASN1DecGeneric gen(Source);
sl@0: 	gen.InitL();
sl@0: 	TTime t = GetTimeL(gen.GetContentDER());
sl@0: 	aPos+=gen.LengthDER();
sl@0: 	return t;
sl@0: 	}
sl@0: 
sl@0: EXPORT_C TTime TASN1DecUTCTime::DecodeDERL(const TASN1DecGeneric& aGen)
sl@0: 
sl@0: 	{
sl@0: 	return GetTimeL(aGen.GetContentDER());
sl@0: 	}