| author | sl@SLION-WIN7.fritz.box |
| Fri, 15 Jun 2012 03:10:57 +0200 | |
| changeset 0 | bde4ae8d615e |
| permissions | -rw-r--r-- |
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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 ASN1 Object ID base class. |
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* |
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*/ |
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|
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|
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#include "asn1dec.h" |
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|
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const TInt KMaxOIDLength = 164; |
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|
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EXPORT_C TASN1DecObjectIdentifier::TASN1DecObjectIdentifier(void) |
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{
|
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} |
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|
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EXPORT_C HBufC* TASN1DecObjectIdentifier::DecodeDERL(const TDesC8& aSource,TInt& aPos) |
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{
|
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TASN1DecGeneric gen(aSource.Right(aSource.Length() - aPos)); |
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gen.InitL(); |
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HBufC* res = DecodeDERL(gen); |
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aPos+=gen.LengthDER(); |
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return res; |
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} |
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|
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EXPORT_C HBufC* TASN1DecObjectIdentifier::DecodeDERL(const TASN1DecGeneric& aSource) |
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{
|
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TFixedArray<TInt, KNumberOfIDs>* oid = new(ELeave) TFixedArray<TInt, KNumberOfIDs>; |
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CleanupStack::PushL(oid); |
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TInt count = DecodeContentsL(*oid, aSource.GetContentDER()); |
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HBufC* res = HBufC::NewLC(KMaxOIDLength); |
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TPtr pRes = res->Des(); |
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if (count > 0) |
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{
|
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pRes.AppendNum((*oid)[0]); |
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for (TInt i = 1; i < count; i++) |
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{
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pRes.Append('.');
|
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pRes.AppendNum((*oid)[i]); |
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} |
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} |
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CleanupStack::Pop();//res |
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CleanupStack::PopAndDestroy();//oid |
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return res; |
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} |
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|
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TInt TASN1DecObjectIdentifier::DecodeContentsL(TFixedArray<TInt, KNumberOfIDs>& aArray, const TDesC8& aSource) |
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{
|
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TInt l = aSource.Length(); |
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TInt i=0; |
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TInt SubID=0; |
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TInt SIDn=0; |
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if(l < 1) |
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{
|
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User::Leave(KErrArgument); |
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} |
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SubID+=aSource[i]; |
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i++; |
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if (SubID>=80) |
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{
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aArray[SIDn++]=2; |
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SubID-=80; |
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} |
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else |
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{
|
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if (SubID>=40) |
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{
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aArray[SIDn++]=1; |
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SubID-=40; |
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} |
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else |
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{
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aArray[SIDn++]=0; |
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} |
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} |
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aArray[SIDn++]=SubID; |
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for (;i < l;) |
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{
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SubID=0; |
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while (aSource[i]&0x80) |
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{
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// if shifting by 7 does not increase the value its overflowed |
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if ( SubID && ((SubID << 7) <= SubID) ) |
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{
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User::Leave(KErrOverflow); |
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} |
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|
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SubID<<=7; |
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SubID+=aSource[i]&0x7f; |
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if(i == (l-1)) |
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{
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User::Leave(KErrArgument); |
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} |
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i++; |
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} |
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if ( SubID && ((SubID << 7) <= SubID) ) |
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{
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User::Leave(KErrOverflow); |
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} |
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SubID<<=7; |
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SubID+=aSource[i]; |
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|
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i++; |
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if (SIDn >= KNumberOfIDs) |
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{
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User::Leave(KErrOverflow); |
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} |
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aArray[SIDn++]=SubID; |
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} |
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return SIDn; |
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} |