1 /*

     2 * Copyright (c) 2003-2009 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     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".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description: 

    15 *

    16 */

    17 

    18  

    19 #include "pkcs7contentinfo_v2.h"

    20 #include "pkcs7asn1.h"

    21 

    22 EXPORT_C CPKCS7ContentInfo* CPKCS7ContentInfo::NewL(const TDesC8& aRawData)

    23 	{

    24 	CPKCS7ContentInfo* self = new (ELeave) CPKCS7ContentInfo();

    25 	CleanupStack::PushL(self);

    26 	self->ConstructL(aRawData);

    27 	CleanupStack::Pop(self);

    28 	return self;	

    29 	}

    30 

    31 CPKCS7ContentInfo::~CPKCS7ContentInfo()

    32 	{

    33 	}

    34 

    35 EXPORT_C CPKCS7ContentInfo::TContentInfoType CPKCS7ContentInfo::ContentType() const

    36 	{

    37 	return iContentType;

    38 	}

    39 

    40 EXPORT_C const TPtrC8 CPKCS7ContentInfo::ContentData() const

    41 	{

    42 	return iContentData;	

    43 	}

    44 

    45 CPKCS7ContentInfo::CPKCS7ContentInfo(void)

    46 	{

    47 	}

    48 

    49 void CPKCS7ContentInfo::ConstructL(const TDesC8& aRawData)

    50 	{  

    51 	const TInt minItems = 1;	// Must have OID

    52 	const TInt maxItems = 2;	// May have data

    53 

    54 	CArrayPtr<TASN1DecGeneric>* contentInfo = PKCS7ASN1::DecodeSequenceLC(aRawData, minItems, maxItems);

    55 

    56     const TASN1DecGeneric* contentInfoAt0 = contentInfo->At(0);

    57 	// Checks its a oid id

    58 	if(contentInfoAt0->Tag()==EASN1ObjectIdentifier || contentInfoAt0->Class() == EUniversal)

    59 		{

    60 		// Gets the oid

    61 		TASN1DecObjectIdentifier oidDec;

    62 		HBufC* oidVal = oidDec.DecodeDERL(*contentInfo->At(0));

    63 		CleanupStack::PushL(oidVal);

    64 		// Data itself is optional so make sure its there

    65 		if(contentInfo->Count() == 2)

    66 			{

    67 			const TASN1DecGeneric* contentInfoAt1 = contentInfo->At(1);

    68 			if ( contentInfoAt1->Tag() == 0 || contentInfoAt1->Class() == EContextSpecific )

    69 				{

    70 				TASN1DecGeneric decGen(contentInfoAt1->GetContentDER());

    71 				decGen.InitL();

    72 	            if(*oidVal == KPkcs7DataOID)

    73 					{

    74 					// ContentData is OctetString if ContentType is Data

    75 					if(decGen.Tag() == EASN1OctetString)   

    76 						{

    77 						iContentData.Set(decGen.GetContentDER()); 

    78 						}

    79 					else

    80 						{

    81 						User::Leave(KErrArgument);

    82 						}

    83 					}

    84 				else

    85 					{

    86 					iContentData.Set(decGen.Encoding());

    87 					}

    88 				}

    89 			}

    90 		else

    91 			{

    92 			iContentData.Set(KNullDesC8());

    93 			}

    94 		// Checks if it is data OID.

    95 		if(*oidVal == KPkcs7DataOID)

    96 			{

    97 			// The Content Type is indicated by an Integer.

    98 			// Here if Content Type is equal to Data then,it is represented by 1

    99 			// 1 indicates the numeric value of last element in the PKCS7 Data OID.

   100 			iContentType = EContentTypeData;

   101 			}

   102 		else if(*oidVal == KPkcs7SignedDataOID)

   103 			{

   104 			// The Content Type is indicated by an Integer.

   105 			// Here if Content Type is equal to SignedData then,it is represented by 2

   106 			// 2 indicates the numeric value of last element in the PKCS7 SignedData OID.

   107 			iContentType = EContentTypeSignedData;

   108 			}

   109 		else if(*oidVal == KPkcs7EnvelopedDataOID) 

   110 			{

   111 			// The Content Type is indicated by an Integer.

   112 			// Here if Content Type is equal to EnvelopedData then,it is represented by 3.

   113 			// 3 indicates the numeric value of last element in the PKCS7 EnvelopedData OID.

   114 			iContentType = EContentTypeEnvelopedData;

   115 			}

   116 		else if(*oidVal == KPkcs7SignedAndEnvelopedDataOID)

   117 			{

   118 			// The Content Type is indicated by an Integer.

   119 			// Here if Content Type is equal to SignedAndEnvelopedData then,it is represented by 4.

   120 			// 4 indicates the numeric value of last element in the PKCS7 SignedAndEnvelopedData OID.

   121 			iContentType = EContentTypeSignedAndEnvelopedData;

   122 			}

   123 		else if(*oidVal == KPkcs7DigestedDataOID)

   124 			{

   125 			// The Content Type is indicated by an Integer.

   126 			// Here if Content Type is equal to DigestedData then,it is represented by 5.

   127 			// 5 indicates the numeric value of last element in the PKCS7 DigestedData OID.

   128 			iContentType = EContentTypeDigestedData;

   129 			}

   130 		else if(*oidVal == KPkcs7EncryptedDataOID)

   131 			{

   132 			// The Content Type is indicated by an Integer.

   133 			// Here if Content Type is equal to EncryptedData then,it is represented by 6

   134 			// 6 indicates the numeric value of last element in the PKCS7 EncryptedData OID.

   135 			iContentType = EContentTypeEncryptedData;

   136 			}

   137 		else

   138 			{

   139 			User::Leave(KErrNotSupported);

   140 			}

   141 		CleanupStack::PopAndDestroy(oidVal);

   142 		}

   143 	else

   144 		{

   145 		User::Leave(KErrArgument);

   146 		}

   147 	CleanupStack::PopAndDestroy(contentInfo);

   148 	}