Update contrib.
2 * Copyright (c) 2003-2009 Nokia Corporation and/or its subsidiary(-ies).
4 * This component and the accompanying materials are made available
5 * under the terms of the License "Eclipse Public License v1.0"
6 * which accompanies this distribution, and is available
7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".
9 * Initial Contributors:
10 * Nokia Corporation - initial contribution.
21 #include <securityerr.h>
22 #include <cryptopanic.h>
24 #include "paddingshim.h"
27 EXPORT_C CPaddingPKCS7* CPaddingPKCS7::NewL(TInt aBlockBytes)
29 __ASSERT_ALWAYS(aBlockBytes > 0, User::Leave(KErrArgument));
30 return CPaddingPKCS7Shim::NewL(aBlockBytes);
33 EXPORT_C CPaddingPKCS7* CPaddingPKCS7::NewLC(TInt aBlockBytes)
35 CPaddingPKCS7* self = CPaddingPKCS7::NewL(aBlockBytes);
36 CleanupStack::PushL(self);
40 EXPORT_C CPaddingPKCS7::CPaddingPKCS7(TInt aBlockBytes):CPadding(aBlockBytes)
44 void CPaddingPKCS7::DoPadL(const TDesC8& aInput,TDes8& aOutput)
46 TInt paddingBytes = BlockSize()-(aInput.Length()%BlockSize());
47 aOutput.Append(aInput);
48 aOutput.SetLength(aOutput.Length()+paddingBytes);
49 for (TInt i=1;i<=paddingBytes;i++)
51 aOutput[aOutput.Length()-i]=(TUint8)(paddingBytes);
55 void CPaddingPKCS7::UnPadL(const TDesC8& aInput,TDes8& aOutput)
57 TUint inputLen = aInput.Length();
58 TUint paddingLen = (TUint)(aInput[inputLen - 1]);
60 if (paddingLen > inputLen)
62 User::Leave(KErrInvalidPadding);
65 TInt outlen = aInput.Length() - paddingLen;
67 __ASSERT_DEBUG(aOutput.MaxLength() >= outlen, User::Panic(KCryptoPanic, ECryptoPanicOutputDescriptorOverflow));
69 aOutput.Append(aInput.Left(outlen));
70 for (TInt i=outlen;i<inputLen;i++)
72 //All padding bytes must equal the length of padding expected
73 if (aInput[i]!=paddingLen)
75 User::Leave(KErrInvalidPadding);
80 TInt CPaddingPKCS7::MinPaddingLength(void) const
82 //if aInputBytes is 1 less than the blocksize then we get 1 byte of padding
86 TInt CPaddingPKCS7::MaxPaddedLength(TInt aInputBytes) const
88 TUint padBytes = BlockSize() - (aInputBytes % BlockSize());
89 return padBytes + aInputBytes;