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CASN1EncBitString Class Reference

class CASN1EncBitString : public CASN1EncPrimitive

Class for encoding bit strings (keys, for example).

Inherits from

Public Member Functions
~CASN1EncBitString ()
IMPORT_C CASN1EncBitString * NewL (const TDesC8 &)
IMPORT_C CASN1EncBitString * NewL (const TDesC8 &, TUint )
IMPORT_C CASN1EncBitString * NewL (const CASN1EncBase &)
IMPORT_C CASN1EncBitString * NewLC (const TDesC8 &)
IMPORT_C CASN1EncBitString * NewLC (const TDesC8 &, TUint )
IMPORT_C CASN1EncBitString * NewLC (const CASN1EncBase &)
Private Member Functions
CASN1EncBitString ()
void CalculateContentsLengthDER ()
void ConstructL (const TDesC8 &)
void ConstructL (const TDesC8 &, TUint )
void ConstructL (const CASN1EncBase &)
void WriteContentsDERL ( TDes8 &)
Inherited Functions
CASN1EncBase::CASN1EncBase(const TTagType,const TASN1Class)
CASN1EncBase::CalculateLengthLengthDER()
CASN1EncBase::ConstructL()
CASN1EncBase::ContentsLengthChanged()
CASN1EncBase::LengthDER()const
CASN1EncBase::SetParent(CASN1EncBase *)
CASN1EncBase::SetTag(const TTagType,const TASN1Class)
CASN1EncBase::WriteDERL(TDes8 &,TUint &)const
CASN1EncBase::~CASN1EncBase()
CASN1EncPrimitive::CASN1EncPrimitive(const TTagType)
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
HBufC8 * iContents
TUint8 iPadding
Inherited Attributes
CASN1EncBase::iContentsLengthDER
CASN1EncBase::iLengthLengthDER
CASN1EncBase::iTagLengthDER

Constructor & Destructor Documentation

CASN1EncBitString()

CASN1EncBitString ( ) [private]

~CASN1EncBitString()

IMPORT_C ~CASN1EncBitString ( )

Member Functions Documentation

CalculateContentsLengthDER()

void CalculateContentsLengthDER ( ) [private, virtual]

Calculates length of DER-encoded bit string contents. For non empty bit strings this differs from octet string in the extra leading byte containing the number of unused bits in the last octet.

ConstructL(const TDesC8 &)

void ConstructL ( const TDesC8 & aBitStr ) [private]

Parameters

const TDesC8 & aBitStr

ConstructL(const TDesC8 &, TUint)

void ConstructL ( const TDesC8 & aBitStr,
TUint aLengthBits
) [private]

Parameters

const TDesC8 & aBitStr
TUint aLengthBits

ConstructL(const CASN1EncBase &)

void ConstructL ( const CASN1EncBase & aAsnObj ) [private]
Constructs bit string from ASN.1 encoding object.
Note:

First produces raw DER encoding from the object, then creates a bit string using other construct function.

Parameters

const CASN1EncBase & aAsnObj ASN.1 encoding object to wrap in bit string.

NewL(const TDesC8 &)

IMPORT_C CASN1EncBitString * NewL ( const TDesC8 & aBitStr ) [static]

Constructs a new DER bit string encoder from a bit string that does not have unused bits at the end, i.e. is octet-aligned. The passed string must be in big-endian format.

Parameters

const TDesC8 & aBitStr Octet-aligned bit string.

NewL(const TDesC8 &, TUint)

IMPORT_C CASN1EncBitString * NewL ( const TDesC8 & aBitStr,
TUint aLengthBits
) [static]

Constructs a new DER bit string encoder from a bit string that is not octet-aligned, which means it has unused bits in its last octet. The passed string must be in big-endian format.

Parameters

const TDesC8 & aBitStr Bit string.
TUint aLengthBits Length in bits of the passed bit string. The function will panic if aLengthBits is greater than the actual bit length of aBitString, or the difference is more that 7 bits.

NewL(const CASN1EncBase &)

IMPORT_C CASN1EncBitString * NewL ( const CASN1EncBase & aAsnObj ) [static]

Wraps the passed encoding object into a bit string.

Parameters

const CASN1EncBase & aAsnObj Encoding object to wrap.

NewLC(const TDesC8 &)

IMPORT_C CASN1EncBitString * NewLC ( const TDesC8 & aBitStr ) [static]

Constructs a new DER bit string encoder from a bit string that does not have unused bits at the end, i.e. is octet-aligned. The passed string must be in big-endian format.

Parameters

const TDesC8 & aBitStr Octet-aligned bit string.

NewLC(const TDesC8 &, TUint)

IMPORT_C CASN1EncBitString * NewLC ( const TDesC8 & aBitStr,
TUint aLengthBits
) [static]

Constructs a new DER bit string encoder from a bit string that is not octet-aligned, which means it has unused bits in its last octet. The passed string must be in big-endian format.

Parameters

const TDesC8 & aBitStr Bit string.
TUint aLengthBits Length in bits of the passed bit string. The function will panic if aLengthBits is greater than the actual bit length of aBitString, or the difference is more that 7 bits.

NewLC(const CASN1EncBase &)

IMPORT_C CASN1EncBitString * NewLC ( const CASN1EncBase & aAsnObj ) [static]

Wraps the passed encoding object into a bit string.

Parameters

const CASN1EncBase & aAsnObj Encoding object to wrap.

WriteContentsDERL(TDes8 &)

void WriteContentsDERL ( TDes8 & aBuf ) const [private, virtual]

Writes DER-encoded bit string contents to aBuf. Prepends the actual bit string octets with extra octet containing number of unused bits in the last octet. Before writing, converts contents of the bit string to big-endian form.

Parameters

TDes8 & aBuf Buffer to write to; must be long enough; see CalculateContentsLengthDER method.

Member Data Documentation

HBufC8 * iContents

HBufC8 * iContents [private]

TUint8 iPadding

TUint8 iPadding [private]

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