iaik.security.ecc.parameter
Class ECCParameterFactory

java.lang.Object
  iaik.security.ecc.parameter.ECCParameterFactory

public class ECCParameterFactory

extends java.lang.Object

Collection of elliptic curve and domain parameters. Implemented as a singleton. Use the static getInstance() method. Parameters are either referenced by their names (case insensitive) or by their oid, or both.

Method Summary

void	addECCParameter(java.lang.String parameterName, java.lang.String oid, java.math.BigInteger p, java.math.BigInteger k, java.math.BigInteger r, java.math.BigInteger s, java.math.BigInteger c, java.math.BigInteger a, java.math.BigInteger b, java.math.BigInteger gx, java.math.BigInteger gy) Adds ECC parameters to the repository of the factory.
void	addECCParameter(java.lang.String parameterName, java.lang.String oid, int[] irreducible, java.math.BigInteger k, java.math.BigInteger r, int[] a, int[] b, int[] gx, int[] gy) Adds ECC parameters to the repository of the factory.
void	clearAll() Clears all ecc parameters.
static void	deleteInstance()
static ECCParameterFactory	getInstance() Singleton method to get an instance of this class.
java.util.Enumeration	getNames()
ECCParameterSpec	getParameterByName(java.lang.String name)
ECCParameterSpec	getParameterByOID(java.lang.String oid)
ECCParameterSpec	removeECCParameterbyName(java.lang.String name) Removes a set of ECC parameters from the repository.
ECCParameterSpec	removeECCParameterbyOID(java.lang.String oid) Removes a set of ECC parameters with the provided OID from the repository.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

deleteInstance

public static void deleteInstance()

getInstance

public static ECCParameterFactory getInstance()

Singleton method to get an instance of this class.

addECCParameter

public void addECCParameter(java.lang.String parameterName,
                            java.lang.String oid,
                            java.math.BigInteger p,
                            java.math.BigInteger k,
                            java.math.BigInteger r,
                            java.math.BigInteger s,
                            java.math.BigInteger c,
                            java.math.BigInteger a,
                            java.math.BigInteger b,
                            java.math.BigInteger gx,
                            java.math.BigInteger gy)
                     throws ECCException

Adds ECC parameters to the repository of the factory. The parameters are identified either by a name or by the oid or both.

Parameters:

parameterName - the name (alias) for this ecc parameter set. This parameter may be null if the oid parameter is specified.

oid - the unique object identifier of this parameter set. If null the name parameter must be specified.

p - the prime modulus p, defining the field.

k - the cofactor.

r - the order r.

s - the 160-bit input seed s to the SHA-1 based algorithm.

c - the output c of the SHA-1 based algorithm.

a - the coefficient a

b - the coefficient b (satisfying b^2 * c congruent -27 mod p);

gx - the base point x coordinate Gx

gy - the base point y coordinate Gy

Throws:

ECCException - if oid and the parameter name are null

addECCParameter

public void addECCParameter(java.lang.String parameterName,
                            java.lang.String oid,
                            int[] irreducible,
                            java.math.BigInteger k,
                            java.math.BigInteger r,
                            int[] a,
                            int[] b,
                            int[] gx,
                            int[] gy)
                     throws ECCException

Adds ECC parameters to the repository of the factory. The parameters are identified either by a name or by the oid or both.

Parameters:

parameterName - the name (alias) for this ecc parameter set. This parameter may be null if the oid parameter is specified.

oid - the unique object identifier of this parameter set. If null the name parameter must be specified.

irreducible - the irreducible polynom, defining the field.

k - the cofactor.

r - the order r.

a - the coefficient a

b - the coefficient b (satisfying b^2 * c congruent -27 mod p);

gx - the base point x coordinate Gx

gy - the base point y coordinate Gy

Throws:

ECCException - if oid and the parameter name are null

clearAll

public void clearAll()

Clears all ecc parameters.

getNames

public java.util.Enumeration getNames()

Returns:

all defined names of all parameters.

getParameterByName

public ECCParameterSpec getParameterByName(java.lang.String name)

Parameters:

name - the name (alias) of the ecc parameter

Returns:

the ecc parameters with the given name or null if no such parameter exists.

getParameterByOID

public ECCParameterSpec getParameterByOID(java.lang.String oid)

Parameters:

oid - the oid ecc parameter

Returns:

the ecc parameters with the given oid or null if no such parameter exists.

removeECCParameterbyName

public ECCParameterSpec removeECCParameterbyName(java.lang.String name)

Removes a set of ECC parameters from the repository. ONLY the name entry will be deleted the parameters will remain accessible by oid.

Parameters:

name - the name of the parameter set.

Returns:

the removed parameters or null if the parameters could not be found.

removeECCParameterbyOID

public ECCParameterSpec removeECCParameterbyOID(java.lang.String oid)

Removes a set of ECC parameters with the provided OID from the repository. ONLY the OID entry will be deleted. The parameters will remain accessible by their name.

Parameters:

oid - the object identifier for this parameter set.

Returns:

the removed parameters or null if the parameters could not be found.