iaik.security.ec.math.field

Class PrimeFieldByPrimeFactory

java.lang.Object

iaik.security.ec.math.field.PrimeFieldByPrimeFactory

public final class PrimeFieldByPrimeFactory
extends Object

This field factory serves prime fields for specific primes that pass the Miller-Rabin test with certainty (1 - 2^-100). In case there is an optimized implementation of a field, it automatically returns this one.

Author:

Christian Hanser

See Also:

AbstractPrimeField, PrimeFieldByBitLengthFactory

Method Summary

Modifier and Type	Method and Description
static AbstractPrimeField	getField(BigInteger prime) The factory method.
static AbstractPrimeField	getField(iaik.asn1.SEQUENCE encodedField) Decodes an ASN.1 SEQUENCE, which describes a prime field and returns the corresponding field instance.

Methods inherited from class java.lang.Object

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

Method Detail

getField

public static AbstractPrimeField getField(iaik.asn1.SEQUENCE encodedField)

Decodes an ASN.1 SEQUENCE, which describes a prime field and returns the corresponding field instance.

Parameters:

encodedField - the ASN.1 structure holding the encoded field

Returns:

the corresponding AbstractPrimeField instance

getField

public static AbstractPrimeField getField(BigInteger prime)

The factory method.

Parameters:

prime - the prime number that passes the Miller-Rabin test

Returns:

the prime finite field F_p