SiSHA256 Class Reference

a class implementing the hash function SHA256 More...

Inheritance diagram for SiSHA256:

Public Member Functions
	SiSHA256 ()
	default constructor
virtual	~SiSHA256 ()
	destructor
virtual OFCondition	initialize ()
	initializes the MAC algorithm. More...
virtual OFCondition	digest (const unsigned char *data, unsigned long length)
	feeds data into the MAC algorithm More...
virtual OFCondition	finalize (unsigned char *result)
	finalizes the MAC and writes it to the given output array, which must be at least getSize() bytes large. More...
virtual unsigned long	getSize () const
	returns the size of a MAC in bytes. More...
virtual E_MACType	macType () const
	returns the type of MAC algorithm computed by this object More...
virtual const char *	getDefinedTerm () const
	returns the DICOM identifier for this MAC algorithm More...
Public Member Functions inherited from SiMAC
	SiMAC ()
	default constructor
virtual	~SiMAC ()
	destructor

Private Member Functions
	SiSHA256 (SiSHA256 &arg)
	private undefined copy constructor
SiSHA256 &	operator= (SiSHA256 &arg)
	private undefined copy assignment operator

Private Attributes
SHA256_CTX *	ctx
	OpenSSL SHA256 context.

Detailed Description

a class implementing the hash function SHA256

Remarks

this class is only available if DCMTK is compiled with OpenSSL support enabled.

Member Function Documentation

digest()

virtual OFCondition SiSHA256::digest ( const unsigned char *  data, unsigned long  length  )

virtual

feeds data into the MAC algorithm

Parameters

data	pointer to raw data to be fed into the MAC, must not be NULL
length	number of bytes in raw data array

Returns

status code

Implements SiMAC.

finalize()

virtual OFCondition SiSHA256::finalize ( unsigned char *  result )

virtual

finalizes the MAC and writes it to the given output array, which must be at least getSize() bytes large.

After a call to finalize, the MAC algorithm must be initialized again, see initialize().

Parameters

result

pointer to array of getSize() bytes into which the MAC is written

Returns

status code

Implements SiMAC.

getDefinedTerm()

virtual const char* SiSHA256::getDefinedTerm ( ) const

virtual

returns the DICOM identifier for this MAC algorithm

Returns

DICOM defined term for algorithm

Implements SiMAC.

getSize()

virtual unsigned long SiSHA256::getSize ( ) const

virtual

returns the size of a MAC in bytes.

Returns

block size for this MAC algorithm

Implements SiMAC.

initialize()

virtual OFCondition SiSHA256::initialize ( )

virtual

initializes the MAC algorithm.

Returns

status code

Implements SiMAC.

macType()

virtual E_MACType SiSHA256::macType ( ) const

virtual

returns the type of MAC algorithm computed by this object

Returns

type of MAC algorithm

Implements SiMAC.

---

The documentation for this class was generated from the following file:

• dcmsign/include/dcmtk/dcmsign/sisha256.h