--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/cryptoservices/certificateandkeymgmt/asn1/gentimedec.cpp Wed Jul 08 11:25:26 2009 +0100
@@ -0,0 +1,276 @@
+/*
+* 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 General Time ASN1 class.
+* Fully support three forms of ASN.1 generalizedTime
+* Fraction of second accepts 1,2 or 3 digits input. This is to maximize the tolerance of client input
+*
+*/
+
+
+#include <asn1dec.h>
+
+EXPORT_C TASN1DecGeneralizedTime::TASN1DecGeneralizedTime()
+ {
+ }
+
+TTime TASN1DecGeneralizedTime::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?
+
+ // I guess we ought to check that the contents we've got are long enough to contain a time!
+ if (aSource.Length()<13)
+ {
+ User::Leave(KErrArgument);
+ }
+
+ // Check all digits the main bit of time are valid, YYYY:MM:DD HH:MM
+ TInt i;
+ for (i=0;i<12;i++)
+ {
+ TUint8 j;
+ j=(TUint8)(aSource[i]-'0');
+ if (j>=10)
+ {
+ User::Leave(KErrArgument);
+ }
+ }
+ //check seconds are valid if present
+ i = 12;
+ if(aSource.Length() > 13)
+ {
+ if ((aSource[i] < '0') || (aSource[i] > '9')
+ || (aSource[i+1] < '0') || (aSource[i+1] > '9'))
+ User::Leave(KErrArgument);
+ }
+
+ i = 14;
+ //if the time string is longer
+ if(aSource.Length() > 14)
+ {
+ TInt countDot = 0;
+ TInt countOperator = 0;
+ TInt countZ = 0;
+
+ //check if the extra bytes are valid
+ while(i < aSource.Length())
+ {
+ switch(aSource[i])
+ {
+ case '.': //'.' can't appear more than once and at least one digit should follow
+ countDot++;
+ if(countDot > 1)
+ User::Leave(KErrArgument);
+
+ if(aSource.Length()-1 == i) //error, '.' is last char in time string
+ User::Leave(KErrArgument);
+ else
+ {
+ if(aSource[i+1] - '0' < 0 || aSource[i+1] - '0' > 9)
+ User::Leave(KErrArgument);
+ }
+ break;
+
+ case '+':
+ case '-': // '+' and '-' can't appear more than once and at least four digits should follow
+ // After that, we reach either EOF or 'Z', no more char could follow
+ countOperator++;
+ if(countOperator > 1)
+ User::Leave(KErrArgument);
+
+ if(aSource.Length()-1 < i + 4) //error, not enough digits following operator
+ User::Leave(KErrArgument);
+ else
+ {
+ for(TInt j = i+1; j <= i+4; j++)
+ if(aSource[j] - '0' < 0 || aSource[j] -'0' > 9)
+ User::Leave(KErrArgument);
+
+
+ if(aSource.Length() > i + 6)//error, unexpected rubbish
+ User::Leave(KErrArgument);
+ if(aSource.Length() == i + 6 && aSource[i+5] != 'Z')
+ User::Leave(KErrArgument);
+ }
+
+
+ break;
+ case 'Z': //'Z' can't appear more than once and must be the last char in time string
+ countZ++;
+ if(countZ > 1)
+ User::Leave(KErrArgument);
+
+ if(aSource.Length()-1 > i) //error, something following 'Z'
+ User::Leave(KErrArgument);
+
+
+ break;
+ default: //so is this a digit?
+ if(aSource[i] -'0' < 0 || aSource[i] -'0' > 9)
+ User::Leave(KErrArgument);
+ }
+ i++;
+ }
+
+
+ }
+ // 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
+ TInt MicroSecond = 0;
+ TInt offsetIntHours = 0, offsetIntMinutes = 0;
+ TTimeIntervalHours offsetHours = 0;
+ TTimeIntervalMinutes offsetMinutes = 0;
+ Year=(aSource[0]-'0')*1000+(aSource[1]-'0')*100+(aSource[2]-'0')*10+(aSource[3]-'0');
+ Month=(aSource[4]-'0')*10+aSource[5]-'0';
+ Month--; // Because the enum for months starts at 0 not 1
+ Day=(aSource[6]-'0')*10+aSource[7]-'0';
+ Day--; // Because the enum for days starts at 0 not 1
+ Hour=(aSource[8]-'0')*10+aSource[9]-'0';
+ Minute=(aSource[10]-'0')*10+aSource[11]-'0';
+ TInt Pos=12;
+
+
+ if (aSource.Length()>13)
+ {
+ // seconds
+ Second = (aSource[Pos++]-'0')*10;
+ Second += aSource[Pos++]-'0';
+
+ }
+
+ // check range for various components
+ 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);
+ }
+
+ //optional 3 bytes fraction of seconds
+ //Converts the fraction of seconds to microsecond
+ if(aSource.Length() > Pos && aSource[Pos] == '.')
+ {
+ Pos++;
+
+ TInt multiplier = 100000;
+
+ // parse fraction of second
+ while(Pos <= 17 && Pos < aSource.Length())
+ {
+ if(!((aSource[Pos] >= '0') && (aSource[Pos] <= '9')))
+ break; //fraction ended
+
+ MicroSecond += (aSource[Pos++]-'0') * multiplier;
+ multiplier /= 10;
+
+ }
+
+ }
+
+ if (aSource.Length()>Pos)
+ {
+ TBool aheadUTC = EFalse;
+ switch (aSource[Pos])
+ {
+ case 'Z':
+ // Zulu - nothing more to do
+ break;
+ case '+':
+ //'+' indicates local time is ahead of UTC, need to substract the offset later
+ aheadUTC = ETrue;
+ // The case fall-through is intentional, both cases have the same functionality, with a different
+ // aheadUTC value
+ case '-':
+ {//brackets are required to prevent armv5 warning and gccxml errors
+
+
+ //'-' indicates local time is behind of UTC, need to add the offset later
+ //if we are in here with '-', aheadUTC has already been set to the correct value
+
+ Pos++;
+
+
+ //parse
+ TInt multiplier = 10;
+ for(TInt i = 0; i <= 3; i++)
+ {
+ if(i < 2)
+ offsetIntHours += (aSource[Pos + i]-'0') * multiplier;
+ else
+ offsetIntMinutes += (aSource[Pos + i]-'0') * (TInt)multiplier;
+
+ multiplier = (multiplier == 10)? 1 : 10;
+
+
+
+ }
+
+ //expected range,
+ //offset hour range: 0-23
+ //offset minute range: 0-59
+ if(offsetIntHours < 0 || offsetIntHours > 23 ||
+ offsetIntMinutes < 0 || offsetIntMinutes > 59)
+ User::Leave(KErrArgument);
+
+ offsetHours = aheadUTC ? -offsetIntHours : offsetIntHours ;
+ offsetMinutes = aheadUTC ? -offsetIntMinutes : offsetIntMinutes;
+
+ break;
+ }
+ default:
+ // Error!
+ User::Leave(KErrArgument);
+ break;
+ }
+ }
+
+
+
+ TDateTime D(Year, month,Day,Hour,Minute,Second,MicroSecond);
+
+ TTime T(D);
+ T = T + offsetHours;
+ T = T + offsetMinutes;
+ return T;
+ }
+
+EXPORT_C TTime TASN1DecGeneralizedTime::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 TASN1DecGeneralizedTime::DecodeDERL(const TASN1DecGeneric& aGen)
+
+ {
+ return GetTimeL(aGen.GetContentDER());
+ }