com.ibm.crypto.fips.provider

Class RSAKeyFactory

java.lang.Object

java.security.KeyFactorySpi

com.ibm.crypto.fips.provider.RSAKeyFactory

All Implemented Interfaces:

AlgorithmStatus

public final class RSAKeyFactory
extends java.security.KeyFactorySpi
implements AlgorithmStatus

This class implements the RSA key factory of the IBMJCE/IBMJCA provider.

Version:

1.00, 03/16/99

Author:

Janelle Zhang

Field Summary

Fields

Modifier and Type	Field and Description
static int	MAX_MODLEN
static int	MAX_MODLEN_RESTRICT_EXP
static int	MAX_RESTRICTED_EXPLEN
static int	MIN_MODLEN

Constructor Summary

Constructors

Constructor and Description
RSAKeyFactory()

Method Summary

Methods

Modifier and Type	Method and Description
static void	checkKeyLengths(int modulusLen, java.math.BigInteger exponent, int minModulusLen, int maxModulusLen) Check the length of an RSA key modulus/exponent to make sure it is not too short or long.
boolean	isFipsApproved() Module identifies if the cryptographic operation (algorithm) is FIPS certified

Methods inherited from class java.lang.Object

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

Field Detail

MIN_MODLEN

public static final int MIN_MODLEN

See Also:

Constant Field Values

MAX_MODLEN

public static final int MAX_MODLEN

See Also:

Constant Field Values

MAX_MODLEN_RESTRICT_EXP

public static final int MAX_MODLEN_RESTRICT_EXP

See Also:

Constant Field Values

MAX_RESTRICTED_EXPLEN

public static final int MAX_RESTRICTED_EXPLEN

See Also:

Constant Field Values

Constructor Detail

RSAKeyFactory

public RSAKeyFactory()

Method Detail

checkKeyLengths

public static void checkKeyLengths(int modulusLen,
                   java.math.BigInteger exponent,
                   int minModulusLen,
                   int maxModulusLen)
                            throws java.security.InvalidKeyException

Check the length of an RSA key modulus/exponent to make sure it is not too short or long. Some impls have their own min and max key sizes that may or may not match with a system defined value.

Parameters:

modulusLen - the bit length of the RSA modulus.

exponent - the RSA exponent

minModulusLen - if > 0, check to see if modulusLen is at least this long, otherwise unused.

maxModulusLen - caller will allow this max number of bits. Allow the smaller of the system-defined maximum and this param.

Throws:

java.security.InvalidKeyException - if any of the values are unacceptable.

isFipsApproved

public boolean isFipsApproved()

Description copied from interface: AlgorithmStatus

Module identifies if the cryptographic operation (algorithm) is FIPS certified

Specified by:

isFipsApproved in interface AlgorithmStatus

See Also:

AlgorithmStatus.isFipsApproved()