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1 // Copyright (c) 2006-2009 Nokia Corporation and/or its subsidiary(-ies). |
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2 // All rights reserved. |
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3 // This component and the accompanying materials are made available |
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4 // under the terms of "Eclipse Public License v1.0" |
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5 // which accompanies this distribution, and is available |
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6 // at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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7 // |
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8 // Initial Contributors: |
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9 // Nokia Corporation - initial contribution. |
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10 // |
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11 // Contributors: |
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12 // |
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13 // Description: |
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14 // |
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15 |
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16 /** |
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17 @file testpadding.cpp |
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18 @internalTechnology |
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19 */ |
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20 #include "testpadding.h" |
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21 |
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22 #include <securityerr.h> |
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23 |
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24 CTlsTestPadding* CTlsTestPadding::NewLC(TInt aBlockBytes, TInt aPaddingMod) |
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25 { |
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26 return new (ELeave) CTlsTestPadding(aBlockBytes, aPaddingMod); |
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27 } |
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28 |
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29 void CTlsTestPadding::DoPadL(const TDesC8& aInput,TDes8& aOutput) |
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30 { |
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31 TInt paddingBytes=BlockSize()-(aInput.Length()%BlockSize()); |
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32 aOutput.Append(aInput); |
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33 aOutput.SetLength(aOutput.Length()+paddingBytes); |
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34 for (TInt i=1;i<=paddingBytes;i++) |
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35 { |
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36 // apply the padding modifier to every byte in the padding |
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37 aOutput[aOutput.Length()-i]=(TUint8)(paddingBytes+iPaddingMod-1); |
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38 } |
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39 } |
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40 |
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41 void CTlsTestPadding::UnPadL(const TDesC8& aInput,TDes8& aOutput) |
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42 { |
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43 TInt paddingLen = aInput[aInput.Length()-1] + 1; |
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44 |
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45 if (paddingLen > aInput.Length()) |
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46 { |
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47 User::Leave(KErrInvalidPadding); |
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48 } |
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49 |
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50 // check the whole length of the padding is the same byte |
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51 TPtrC8 padding = aInput.Right(paddingLen); |
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52 for (TInt i = 0; i < paddingLen; ++i) |
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53 { |
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54 if (padding[i] != paddingLen) |
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55 { |
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56 User::Leave(KErrInvalidPadding); |
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57 } |
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58 } |
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59 |
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60 TInt outlen = aInput.Length() - paddingLen; |
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61 aOutput.Append(aInput.Left(outlen)); |
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62 } |
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63 |
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64 TInt CTlsTestPadding::MinPaddingLength(void) const |
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65 { |
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66 return 1; |
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67 } |
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68 |
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69 TInt CTlsTestPadding::MaxPaddedLength(TInt aInputBytes) const |
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70 { |
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71 TUint padBytes = BlockSize() - (aInputBytes % BlockSize()); |
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72 return padBytes + aInputBytes; |
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73 } |
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74 |
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75 CTlsTestPadding::CTlsTestPadding(TInt aBlockBytes, TInt aPaddingMod) |
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76 : CPadding(aBlockBytes), iPaddingMod(aPaddingMod) |
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77 { |
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78 } |