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1 /* |
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2 * Copyright (c) 2005-2009 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 * |
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16 */ |
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17 |
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18 |
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19 #include "pkcs7digestinfo.h" |
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20 #include "pkcs7asn1.h" |
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21 |
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22 EXPORT_C CPKCS7DigestInfo* CPKCS7DigestInfo::NewL(const TDesC8& aRawData) |
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23 { |
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24 CPKCS7DigestInfo* self = new (ELeave) CPKCS7DigestInfo(); |
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25 CleanupStack::PushL(self); |
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26 self->ConstructL(aRawData); |
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27 CleanupStack::Pop(self); |
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28 return self; |
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29 } |
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30 |
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31 CPKCS7DigestInfo::~CPKCS7DigestInfo() |
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32 { |
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33 } |
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34 |
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35 CPKCS7DigestInfo::CPKCS7DigestInfo() |
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36 { |
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37 } |
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38 |
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39 EXPORT_C const TDesC8& CPKCS7DigestInfo::Digest() const |
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40 { |
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41 return iDigest; |
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42 } |
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43 |
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44 EXPORT_C TAlgorithmId CPKCS7DigestInfo::Algorithm() const |
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45 { |
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46 return iAlgorithmId; |
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47 } |
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48 |
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49 EXPORT_C const TPtrC8& CPKCS7DigestInfo::EncodedParams() const |
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50 { |
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51 return iEncodedParams; |
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52 } |
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53 |
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54 void CPKCS7DigestInfo::ConstructL(const TDesC8& aDigestData) |
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55 { |
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56 CArrayPtr<TASN1DecGeneric>* digestInfo = PKCS7ASN1::DecodeSequenceLC(aDigestData); |
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57 |
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58 // Check if both the digestAlgorithm and the Digest are present. |
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59 if ( digestInfo->Count() != 2 ) |
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60 { |
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61 User::Leave(KErrArgument); |
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62 } |
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63 |
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64 // DIGEST ALGORITHM |
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65 // Get the algorithm identifier and the encoded parameters present in the sequence. |
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66 const TASN1DecGeneric* digestInfoAt0 = digestInfo->At(0); |
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67 if(digestInfoAt0->Tag() != EASN1Sequence || digestInfoAt0->Class() != EUniversal) |
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68 { |
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69 User::Leave(KErrArgument); |
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70 } |
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71 CX509AlgorithmIdentifier* digestAlg = CX509AlgorithmIdentifier::NewLC(digestInfo->At(0)->Encoding()); |
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72 TAlgorithmId algorithmId = digestAlg->Algorithm(); |
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73 switch(algorithmId) |
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74 { |
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75 case EMD2: |
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76 { |
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77 iAlgorithmId = EMD2; |
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78 } |
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79 break; |
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80 case EMD5: |
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81 { |
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82 iAlgorithmId = EMD5; |
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83 } |
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84 break; |
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85 case ESHA1: |
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86 { |
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87 iAlgorithmId = ESHA1; |
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88 } |
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89 break; |
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90 default: |
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91 User::Leave(KErrNotSupported); |
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92 } |
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93 |
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94 iEncodedParams.Set(digestAlg->EncodedParams()); |
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95 |
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96 // DIGEST |
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97 const TASN1DecGeneric* digestInfoAt1 = digestInfo->At(1); |
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98 if(digestInfoAt1->Tag() != EASN1OctetString || digestInfoAt1->Class() != EUniversal) |
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99 { |
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100 User::Leave(KErrArgument); |
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101 } |
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102 TASN1DecGeneric octetStringDecoder(*(digestInfo->At(1))); |
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103 octetStringDecoder.InitL(); |
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104 iDigest.Set(octetStringDecoder.GetContentDER()); |
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105 |
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106 CleanupStack::PopAndDestroy(2,digestInfo);// digestInfo, digestAlg |
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107 } |