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1 /* |
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2 * Copyright (c) 2006-2009 Nokia Corporation and/or its subsidiary(-ies). |
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3 * All rights reserved. |
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4 * This component and the accompanying materials are made available |
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5 * under the terms of the License "Eclipse Public License v1.0" |
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6 * which accompanies this distribution, and is available |
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7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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8 * |
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9 * Initial Contributors: |
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10 * Nokia Corporation - initial contribution. |
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11 * |
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12 * Contributors: |
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13 * |
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14 * Description: |
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15 * random shim implementation |
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16 * random shim implementation |
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17 * |
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18 */ |
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19 |
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20 |
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21 /** |
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22 @file |
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23 */ |
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24 |
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25 #include "randomshim.h" |
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26 #include <cryptospi/cryptospidef.h> |
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27 #include <cryptospi/cryptorandomapi.h> |
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28 #include <cryptospi/plugincharacteristics.h> |
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29 #include "keys.h" |
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30 #include <e32debug.h> |
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31 |
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32 |
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33 using namespace CryptoSpi; |
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34 |
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35 _LIT(KRandomFail, "Cannot obtain randomness"); |
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36 |
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37 // |
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38 // Random shim implementation |
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39 // |
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40 CRandomShim* CRandomShim::NewL() |
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41 { |
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42 CRandomShim* self = CRandomShim::NewLC(); |
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43 CleanupStack::Pop(); |
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44 return self; |
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45 } |
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46 |
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47 CRandomShim* CRandomShim::NewLC() |
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48 { |
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49 CRandomShim* self = new(ELeave) CRandomShim(); |
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50 CleanupStack::PushL(self); |
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51 self->ConstructL(); |
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52 return self; |
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53 } |
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54 |
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55 void CRandomShim::GenerateBytesL(TDes8& aDest) |
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56 { |
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57 iRandomImpl->GenerateRandomBytesL(aDest); |
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58 } |
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59 |
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60 CRandomShim::CRandomShim() |
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61 { |
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62 } |
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63 |
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64 CRandomShim::~CRandomShim() |
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65 { |
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66 delete iRandomImpl; |
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67 } |
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68 |
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69 void CRandomShim::ConstructL() |
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70 { |
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71 CRandomFactory::CreateRandomL(iRandomImpl, KRandomUid, NULL); |
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72 } |
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73 |
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74 /** |
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75 * @deprecated Use RandomL() instead |
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76 * @panic This function can panic under low memory conditions |
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77 * See PDEF097319: TRandom::Random panics during OOM |
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78 * This method is preserved only for BC reasons |
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79 */ |
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80 void TRandomShim::Random(TDes8& aDest) |
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81 { |
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82 CRandomShim* rand = NULL; |
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83 TRAPD(ret, rand = CRandomShim::NewL()); |
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84 if (ret != KErrNone) |
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85 { |
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86 User::Panic(KRandomFail, ret); |
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87 } |
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88 TRAPD(ret2, rand->GenerateBytesL(aDest)); |
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89 delete rand; |
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90 if (ret2 != KErrNone) |
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91 { |
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92 // this method can't leave so the cleanup stack can't be used (because of PushL()) |
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93 // so we just delete the randon shim here if GenerateBytesL() leaves |
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94 User::Panic(KRandomFail, ret); |
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95 } |
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96 } |
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97 |
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98 void TRandomShim::RandomL(TDes8& aDest) |
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99 { |
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100 CRandomShim* rand = CRandomShim::NewL(); |
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101 CleanupStack::PushL(rand); |
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102 rand->GenerateBytesL(aDest); |
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103 CleanupStack::PopAndDestroy(rand); // Use a singleton, avoid new overhead? |
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104 } |
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105 |