API java : RSAMultiPrimePrivateCrtKeySpec

java.security.spec
Class RSAMultiPrimePrivateCrtKeySpec

java.lang.Object
  java.security.spec.RSAPrivateKeySpec
      java.security.spec.RSAMultiPrimePrivateCrtKeySpec

All Implemented Interfaces:

KeySpec

public class RSAMultiPrimePrivateCrtKeySpec
extends RSAPrivateKeySpec

This class specifies an RSA multi-prime private key, as defined in the PKCS#1 v2.1, using the Chinese Remainder Theorem (CRT) information values for efficiency.

Since:

1.4

See Also:

Key, KeyFactory, KeySpec, PKCS8EncodedKeySpec, RSAPrivateKeySpec, RSAPublicKeySpec, RSAOtherPrimeInfo

Constructor Summary

RSAMultiPrimePrivateCrtKeySpec(BigInteger modulus, BigInteger publicExponent, BigInteger privateExponent, BigInteger primeP, BigInteger primeQ, BigInteger primeExponentP, BigInteger primeExponentQ, BigInteger crtCoefficient, RSAOtherPrimeInfo[] otherPrimeInfo)           Creates a new RSAMultiPrimePrivateCrtKeySpec given the modulus, publicExponent, privateExponent, primeP, primeQ, primeExponentP, primeExponentQ, crtCoefficient, and otherPrimeInfo as defined in PKCS#1 v2.1.

 

Method Summary
BigInteger	getCrtCoefficient()           Returns the crtCoefficient.
RSAOtherPrimeInfo[]	getOtherPrimeInfo()           Returns a copy of the otherPrimeInfo or null if there are only two prime factors (p and q).
BigInteger	getPrimeExponentP()           Returns the primeExponentP.
BigInteger	getPrimeExponentQ()           Returns the primeExponentQ.
BigInteger	getPrimeP()           Returns the primeP.
BigInteger	getPrimeQ()           Returns the primeQ.
BigInteger	getPublicExponent()           Returns the public exponent.

 

Methods inherited from class java.security.spec.RSAPrivateKeySpec
getModulus, getPrivateExponent

 

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

 

Constructor Detail

RSAMultiPrimePrivateCrtKeySpec

public RSAMultiPrimePrivateCrtKeySpec(BigInteger modulus,
                                      BigInteger publicExponent,
                                      BigInteger privateExponent,
                                      BigInteger primeP,
                                      BigInteger primeQ,
                                      BigInteger primeExponentP,
                                      BigInteger primeExponentQ,
                                      BigInteger crtCoefficient,
                                      RSAOtherPrimeInfo[] otherPrimeInfo)

Creates a new RSAMultiPrimePrivateCrtKeySpec given the modulus, publicExponent, privateExponent, primeP, primeQ, primeExponentP, primeExponentQ, crtCoefficient, and otherPrimeInfo as defined in PKCS#1 v2.1.

Note that the contents of otherPrimeInfo are copied to protect against subsequent modification when constructing this object.

Parameters:

modulus - the modulus n.

publicExponent - the public exponent e.

privateExponent - the private exponent d.

primeP - the prime factor p of n.

primeQ - the prime factor q of n.

primeExponentP - this is d mod (p-1).

primeExponentQ - this is d mod (q-1).

crtCoefficient - the Chinese Remainder Theorem coefficient q-1 mod p.

otherPrimeInfo - triplets of the rest of primes, null can be specified if there are only two prime factors (p and q).

Throws:

NullPointerException - if any of the parameters, i.e. modulus, publicExponent, privateExponent, primeP, primeQ, primeExponentP, primeExponentQ, crtCoefficient, is null.

IllegalArgumentException - if an empty, i.e. 0-length, otherPrimeInfo is specified.

getPublicExponent

public BigInteger getPublicExponent()

Returns the public exponent.

Returns:

the public exponent.

getPrimeP

public BigInteger getPrimeP()

Returns the primeP.

Returns:

the primeP.

getPrimeQ

public BigInteger getPrimeQ()

Returns the primeQ.

Returns:

the primeQ.

getPrimeExponentP

public BigInteger getPrimeExponentP()

Returns the primeExponentP.

Returns:

the primeExponentP.

getPrimeExponentQ

public BigInteger getPrimeExponentQ()

Returns the primeExponentQ.

Returns:

the primeExponentQ.

getCrtCoefficient

public BigInteger getCrtCoefficient()

Returns the crtCoefficient.

Returns:

the crtCoefficient.

getOtherPrimeInfo

public RSAOtherPrimeInfo[] getOtherPrimeInfo()

Returns a copy of the otherPrimeInfo or null if there are only two prime factors (p and q).

Returns:

the otherPrimeInfo. Returns a new array each time this method is called.