com.entrust.toolkit.security.arithmetic.fields

Class GFp

java.lang.Object

com.entrust.toolkit.security.arithmetic.fields.GFp

All Implemented Interfaces:

Field

Deprecated.

since 8.0; use Entrust's new EC architecture com.entrust.toolkit.security.crypto.ec instead

public class GFp
extends java.lang.Object
implements Field

The GFp class implements the Field interface.

Use this class to create finite prime fields GF(p) — Galois fields of order p, where p is prime.

Constructor Summary

Constructors

Constructor and Description
GFp(java.math.BigInteger prime) Deprecated. Creates an instance of the GFp class.

Method Summary

Modifier and Type	Method and Description
boolean	equals(java.lang.Object object) Deprecated. Returns true if and only if the calling field and the given field (object argument) are the same.
int	getFieldSize() Deprecated. Returns the field size in bits.
java.lang.String	getFieldType() Deprecated. Returns the field type.
java.math.BigInteger	getNumberOfElements() Deprecated. Returns the number of elements in the calling field.
FieldElement	getOneElement() Deprecated. Returns the One Element.
FieldElement	getZeroElement() Deprecated. Returns the Zero Element.
ASN1Object	toASN1Object() Deprecated. Returns the ASN1 encoding of the calling field as described in X9.62.
java.lang.String	toString() Deprecated. Returns the String representation of the calling field.

Methods inherited from class java.lang.Object

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

Constructor Detail

GFp

public GFp(java.math.BigInteger prime)

Deprecated.

Creates an instance of the GFp class.

Parameters:

prime - a prime number represented as a BigInteger

Note

Precondition: this argument must be a prime number.

Method Detail

getZeroElement

public FieldElement getZeroElement()

Deprecated.

Returns the Zero Element.

The Zero Element is the BigInteger.ZERO wrapped as an instance of GFpElement.

Specified by:

getZeroElement in interface Field

Returns:

the Zero Element as a GFpElement object

getOneElement

public FieldElement getOneElement()

Deprecated.

Returns the One Element.

The One Element is the BigInteger.ONE wrapped as an instance of GFpElement.

Specified by:

getOneElement in interface Field

Returns:

the One Element as a GFpElement object

getNumberOfElements

public java.math.BigInteger getNumberOfElements()

Deprecated.

Returns the number of elements in the calling field.

The number of elements in the field is the prime number argument of the standard constructor.

Specified by:

getNumberOfElements in interface Field

Returns:

a BigInteger representing the number of elements in the calling field

getFieldType

public java.lang.String getFieldType()

Deprecated.

Returns the field type.

The field type is a String that describes the field in human readable form. The String is "prime field".

Specified by:

getFieldType in interface Field

Returns:

the field type as a String — "prime field"

toASN1Object

public ASN1Object toASN1Object()

Deprecated.

Returns the ASN1 encoding of the calling field as described in X9.62.

Specified by:

toASN1Object in interface Field

Returns:

the ASN1 encoding of the field as an instance of ASN1Object. It is a SEQUENCE with components PRIME_FIELD_OID and the prime as an INTEGER.

See Also:

FieldFactory

equals

public boolean equals(java.lang.Object object)

Deprecated.

Returns true if and only if the calling field and the given field (object argument) are the same.

Specified by:

equals in interface Field

Overrides:

equals in class java.lang.Object

Parameters:

object - the reference field with which to compare

Returns:

true if the given field types and the primes that represent the fields are equal — otherwise false

toString

public java.lang.String toString()

Deprecated.

Returns the String representation of the calling field.

Specified by:

toString in interface Field

Overrides:

toString in class java.lang.Object

Returns:

the String

getFieldSize

public int getFieldSize()

Deprecated.

Returns the field size in bits.

For prime finite field F_p, size of prime p in bits is returned.

Specified by:

getFieldSize in interface Field

Returns:

the field size in bits

Since:

7.2 SP2