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CPKCS7DigestInfo Class Reference

class CPKCS7DigestInfo : public CBase

Provides the means to decode PKCS#7 encoded DigestInfo Structure.

Inherits from

CPKCS7DigestInfo
- CBase

Public Member Functions
	~CPKCS7DigestInfo()
IMPORT_C TAlgorithmId	Algorithm()
IMPORT_C const TDesC8 &	Digest()
IMPORT_C const TPtrC8 &	EncodedParams()
IMPORT_C CPKCS7DigestInfo *	NewL(const TDesC8 &)

Private Member Functions
	CPKCS7DigestInfo()
	CPKCS7DigestInfo(const CPKCS7DigestInfo &)
void	ConstructL(const TDesC8 &)
CPKCS7DigestInfo &	operator=(const CPKCS7DigestInfo &)

Inherited Functions
	CBase::CBase()
	CBase::Delete(CBase *)
	CBase::Extension_(TUint,TAny &,TAny )
	CBase::operator new(TUint)
	CBase::operator new(TUint,TAny *)
	CBase::operator new(TUint,TLeave)
	CBase::operator new(TUint,TLeave,TUint)
	CBase::operator new(TUint,TUint)
	CBase::~CBase()

Private Attributes
TAlgorithmId	iAlgorithmId
TPtrC8	iDigest
TPtrC8	iEncodedParams

Constructor & Destructor Documentation

CPKCS7DigestInfo()

CPKCS7DigestInfo

(

)

[private]

Constructor.

CPKCS7DigestInfo(const CPKCS7DigestInfo &)

CPKCS7DigestInfo

(

const CPKCS7DigestInfo &

aDigestInfo

)

[private]

Copy Constructor.

Parameters

const CPKCS7DigestInfo & aDigestInfo

A CPKCS7DigestInfo object.

~CPKCS7DigestInfo()

~CPKCS7DigestInfo

(

)

[virtual]

Destructor.

Member Functions Documentation

Algorithm()

IMPORT_C TAlgorithmId

Algorithm

(

)

const

An Algorithm present DigestAlgorithmIdentifier.

ConstructL(const TDesC8 &)

void

ConstructL

(

const TDesC8 &

aRawData

)

[private]

Decodes the given ASN1 DigestInfo. Below is the ASN1 syntax

DigestInfo ::= SEQUENCE { digestAlgorithm DigestAlgorithmIdentifier, digest Digest } Digest ::= OCTET String DigestAlgorithmIdentifier ::= AlgorithmIdentifier AlgorithmIdentifier ::= SEQUENCE { algorithm ALGORITHM.&id({SupportedAlgorithms}), parameters ALGORITHM.&Type({SupportedAlgorithms}{@ algorithm}) OPTIONAL }

leave: KErrArgument if digestAlgorithm and digest is not present.

leave: KErrNotSupported if algorithm is other than MD2, MD5 and SHA1.

TASN1DecGeneric, CX509AlgorithmIdentifier.

Parameters

const TDesC8 & aRawData

A descriptor containing the PKCS7 DigestInfo Sequence.

Digest()

IMPORT_C const TDesC8 &

Digest

(

)

const

The Digest which is in the DigestInfo.

EncodedParams()

IMPORT_C const TPtrC8 &

EncodedParams

(

)

const

Encoded Parameters present in the DigestAlgorithmIdentifier. The client has to check for data length. It is 0 in case there are no EncodedParams

NewL(const TDesC8 &)

IMPORT_C CPKCS7DigestInfo *

NewL

(

const TDesC8 &

aRawData

)

[static]

Creates a new PKCS#7 DigestInfo object.

leave: KErrArgument if digestAlgorithm and digest is not present.

leave: KErrNotSupported if algorithm is other than MD2, MD5 and SHA1.

Parameters

const TDesC8 & aRawData

contains a PKCS#7 DigestInfo Structure

operator=(const CPKCS7DigestInfo &)

CPKCS7DigestInfo &

operator=

(

const CPKCS7DigestInfo &

aDigestInfo

)

[private]

Assignment operator.

Parameters

const CPKCS7DigestInfo & aDigestInfo

A CPKCS7DigestInfo object.

Member Data Documentation

TAlgorithmId iAlgorithmId

TAlgorithmId

iAlgorithmId

[private]

The object identifier which identifies the message-digest algorithm. A message-digest algorithm maps an octet string (the message) to another octet string (the message digest)

TPtrC8 iDigest

TPtrC8

iDigest

[private]

The Digest is present in the DigestInfo. It is the result of the message-digesting process

TPtrC8 iEncodedParams

TPtrC8

iEncodedParams

[private]

Encoded Parameters which is in the DigestAlgorithmIdentifier