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