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CASN1EncBase Class Reference

class CASN1EncBase : public CBase

Base class for all ASN.1 types that we can encode.

Inherits from

CASN1EncBase
- CBase

Public Member Functions
	~CASN1EncBase()
IMPORT_C TUint	LengthDER()
void	SetParent(CASN1EncBase *)
IMPORT_C void	SetTag(const TTagType, const TASN1Class)
IMPORT_C void	WriteDERL(TDes8 &, TUint &)

Protected Member Functions
	CASN1EncBase(const TTagType, const TASN1Class)
void	CalculateLengthLengthDER()
IMPORT_C void	ConstructL()
void	ContentsLengthChanged()

Private Member Functions
void	CalculateContentsLengthDER()
void	CalculateTagLengthDER()
TBool	IsConstructed()
void	WriteContentsDERL(TDes8 &)
void	WriteHelperL(TDes8 &, TUint &, const TUint, WriteFunc)
void	WriteLengthDER(TDes8 &)
void	WriteTagDERL(TDes8 &)

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()

Protected Attributes
TUint	iContentsLengthDER
TUint	iLengthLengthDER
TUint	iTagLengthDER

Private Attributes
TASN1Class	iClass
CASN1EncBase *	iParent
TTagType	iType

Constructor & Destructor Documentation

CASN1EncBase(const TTagType, const TASN1Class)

IMPORT_C	CASN1EncBase	(	const TTagType	aType,
			const TASN1Class	aClass
		)	[protected]

Protected constructor

Parameters

const TTagType aType	Tag type of the new object
const TASN1Class aClass	Tag class of the new object.

~CASN1EncBase()

IMPORT_C

~CASN1EncBase

(

)

Member Functions Documentation

CalculateContentsLengthDER()

void

CalculateContentsLengthDER

(

)

[private, pure virtual]

Calculates number of octets in DER content encoding. Must set value of the appropriate data member.

CalculateLengthLengthDER()

void

CalculateLengthLengthDER

(

)

[protected]

Calculates number of octets in DER length encoding. Must set value of the appropriate data member. Made protected because it is needed by CASN1EncEncoding class.

CalculateTagLengthDER()

void

CalculateTagLengthDER

(

)

[private]

Calculates number of octets in DER tag encoding. Must set value of the appropriate data member.

ConstructL()

IMPORT_C void

ConstructL

(

)

[protected, virtual]

Must call this version from derived classes in their ConstructL, but only once they're ready to have CalculateContentsLengthDER called on them.

ContentsLengthChanged()

void

ContentsLengthChanged

(

)

[protected]

Derived classes must call this if the length of their contents changes after construction.

IsConstructed()

TBool

IsConstructed

(

)

const [private, pure virtual]

LengthDER()

IMPORT_C TUint

LengthDER

(

)

const

Gives total number of octets in the DER encoding of this object.

SetParent(CASN1EncBase *)

void

SetParent

(

CASN1EncBase *

aParent

)

Sets parent for the object

Parameters

CASN1EncBase * aParent

Pointer to an ASN.1 object that becomes this object's parent.

SetTag(const TTagType, const TASN1Class)

IMPORT_C void	SetTag	(	const TTagType	aType,
			const TASN1Class	aClass = EContextSpecific
		)

Sets tag type/class of the encoding object

Parameters

const TTagType aType	Tag type to set
const TASN1Class aClass = EContextSpecific	Tag class to set.

WriteContentsDERL(TDes8 &)

void

WriteContentsDERL

(

TDes8 &

aBuf

)

const [private, pure virtual]

Writes DER content encoding into supplied buffer, which is already verified to be big enough. Must be implemented by derived classes.

Parameters

TDes8 & aBuf

Buffer to write to.

WriteDERL(TDes8 &, TUint &)

IMPORT_C void	WriteDERL	(	TDes8 &	aBuf,
			TUint &	aPos
		)	const

Writes entire DER encoding of this object into the given buffer.

Parameters

TDes8 & aBuf	Buffer receiving the encoding.
TUint & aPos	Position to start writing at.

WriteHelperL(TDes8 &, TUint &, const TUint, WriteFunc)

void	WriteHelperL	(	TDes8 &	aBuf,
			TUint &	aPos,
			const TUint	aLength,
			WriteFunc	aWriteFunc
		)	const [private]

Helper function, used for efficiency

Parameters

TDes8 & aBuf	Buffer to write to
TUint & aPos	Position in the buffer to start writing at (updated on exit)
const TUint aLength	Length of data to write
WriteFunc aWriteFunc	Points to the function used to perform the actual write operation.

WriteLengthDER(TDes8 &)

void

WriteLengthDER

(

TDes8 &

aBuf

)

const [private, virtual]

Writes DER length encoding into supplied buffer, which is already verified to be big enough.

Parameters

TDes8 & aBuf

Buffer to write to.

WriteTagDERL(TDes8 &)

void

WriteTagDERL

(

TDes8 &

aBuf

)

const [private]

Writes DER tag encoding into supplied buffer, which is already verified to be big enough.

Parameters

TDes8 & aBuf

Buffer to write to.

Member Data Documentation

TASN1Class iClass

TASN1Class

iClass

[private]

TUint iContentsLengthDER

TUint

iContentsLengthDER

[protected]

TUint iLengthLengthDER

TUint

iLengthLengthDER

[protected]

CASN1EncBase * iParent

CASN1EncBase *

iParent

[private]

The object owning this one (if we're held in a sequence, for example).

TUint iTagLengthDER

TUint

iTagLengthDER

[protected]

TTagType iType

TTagType

iType

[private]