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1 // Copyright (c) 1997-2009 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 |
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18 @internalComponent |
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19 */ |
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20 |
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21 #include <hash.h> |
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22 #include <e32math.h> |
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23 #include <obex.h> |
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24 #include "authentication.h" |
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25 |
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26 _LIT8(KColonCharacter, ":"); |
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27 |
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28 CObexAuthenticator* CObexAuthenticator::NewL() |
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29 { |
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30 CObexAuthenticator* s = new(ELeave) CObexAuthenticator; |
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31 CleanupStack::PushL(s); |
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32 s->ConstructL(); |
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33 CleanupStack::Pop(); |
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34 return s; |
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35 } |
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36 |
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37 void CObexAuthenticator::ConstructL() |
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38 { |
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39 iMD5 = CMD5::NewL(); |
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40 } |
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41 |
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42 CObexAuthenticator::CObexAuthenticator() |
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43 { |
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44 TTime time; |
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45 time.UniversalTime(); |
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46 iSeed = time.Int64(); |
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47 } |
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48 |
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49 CObexAuthenticator::~CObexAuthenticator() |
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50 { |
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51 delete iMD5; |
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52 } |
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53 |
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54 TInt CObexAuthenticator::GenerateNonce(TDes8& aNonce) |
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55 { |
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56 TTime time; |
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57 time.UniversalTime(); |
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58 |
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59 TInt64 randomNumber = Math::Rand(iSeed); |
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60 randomNumber <<= 32; |
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61 randomNumber += Math::Rand(iSeed); |
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62 |
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63 TBuf8<33> key; |
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64 key.Zero(); |
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65 key.AppendNum(time.Int64(), EHex); |
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66 key.Append(_L8(":")); |
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67 key.AppendNum(randomNumber, EHex); |
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68 |
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69 iMD5->Reset(); |
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70 aNonce.Append(iMD5->Hash(key)); |
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71 return KErrNone; |
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72 } |
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73 |
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74 void CObexAuthenticator::GenerateResponseL(const TDesC8& aPasswd, const TNonce& aNonce, TRequestDigest& aRequestDigest) |
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75 { |
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76 //work out the length of buffer we need |
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77 TInt buflen = aNonce.Length() + KColonCharacter().Length() + aPasswd.Length(); |
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78 HBufC8* buf = HBufC8::NewLC(buflen); |
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79 TPtr8 ptr = buf->Des(); |
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80 ptr.Zero(); |
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81 ptr.Append(aNonce); |
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82 ptr.Append(KColonCharacter); |
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83 ptr.Append(aPasswd); |
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84 iMD5->Reset(); |
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85 aRequestDigest.Append(iMD5->Hash(*buf)); |
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86 |
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87 CleanupStack::PopAndDestroy();//buf |
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88 } |
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89 |
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90 void CObexAuthenticator::ChallengeResponseL(const TDesC8& aPasswd, const TNonce& aNonce, const TRequestDigest& aRequestDigest) |
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91 { |
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92 TRequestDigest digest; |
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93 digest.Zero(); |
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94 GenerateResponseL(aPasswd, aNonce, digest); |
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95 if (digest != aRequestDigest) |
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96 User::Leave(KErrAccessDenied); |
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97 } |