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

Constructors

RSAMultiPrimePrivateCrtKeySpec

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

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.

Methods

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.