Class CASN1EncBase

class CASN1EncBase : public CBase;

Description

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

Derivation

• CBase - Base class for all classes to be instantiated on the heap

• CASN1EncBase - Base class for all ASN.1 types that we can encode

Members

Defined in CASN1EncBase:
CASN1EncBase(), CalculateContentsLengthDER(), ConstructL(), IsConstructed(), LengthDER(), SetTag(), WriteContentsDERL(), WriteDERL(), WriteLengthDER(), iContentsLengthDER, iLengthLengthDER, iTagLengthDER, ~CASN1EncBase()

Inherited from CBase:
Delete(), Extension_(), operator new()

IMPORT_C ~CASN1EncBase();

Description

protected: IMPORT_C CASN1EncBase(const TTagType aType, const TASN1Class aClass);

Description

Protected constructor

Parameters

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

protected: virtual IMPORT_C void ConstructL();

Description

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

IMPORT_C TUint LengthDER() const;

Description

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

Return value

TUint Number of octets in DER encoding of this object.

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

Description

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.

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

Description

Sets tag type/class of the encoding object

Parameters

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

private: virtual void CalculateContentsLengthDER()=0;

Description

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

private: virtual TBool IsConstructed() const=0;

Description

Return value

TBool

private: virtual void WriteLengthDER(TDes8 &aBuf) const;

Description

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

Parameters

TDes8 &aBuf Buffer to write to.

private: virtual void WriteContentsDERL(TDes8 &aBuf) const=0;

Description

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.

protected: TUint iTagLengthDER;

Description

Length of DER encoded tag.

protected: TUint iLengthLengthDER;

Description

Length of DER encoded length.

protected: TUint iContentsLengthDER;

Description

Length of DER encoded content.