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 v2.2 standard using the Chinese Remainder Theorem (CRT) information values for efficiency.

Since:

1.4

External Specifications

• RFC 8017: PKCS #1: RSA Cryptography Specifications Version 2.2

See Also:

• Key
• KeyFactory
• KeySpec
• PKCS8EncodedKeySpec
• RSAPrivateKeySpec
• RSAPublicKeySpec
• RSAOtherPrimeInfo

Constructor Summary

Constructors

Constructor	Description
RSAMultiPrimePrivateCrtKeySpec(BigInteger modulus, BigInteger publicExponent, BigInteger privateExponent, BigInteger primeP, BigInteger primeQ, BigInteger primeExponentP, BigInteger primeExponentQ, BigInteger crtCoefficient, RSAOtherPrimeInfo[] otherPrimeInfo)	Creates a new RSAMultiPrimePrivateCrtKeySpec.
RSAMultiPrimePrivateCrtKeySpec(BigInteger modulus, BigInteger publicExponent, BigInteger privateExponent, BigInteger primeP, BigInteger primeQ, BigInteger primeExponentP, BigInteger primeExponentQ, BigInteger crtCoefficient, RSAOtherPrimeInfo[] otherPrimeInfo, AlgorithmParameterSpec keyParams)	Creates a new RSAMultiPrimePrivateCrtKeySpec with additional key parameters.

Method Summary

Modifier and Type	Method	Description
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 declared in class java.security.spec.RSAPrivateKeySpec

getModulus, getParams, getPrivateExponent

Methods declared in class java.lang.Object

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

Constructor Details

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.

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 specified parameters except otherPrimeInfo is null

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

RSAMultiPrimePrivateCrtKeySpec

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

Creates a new RSAMultiPrimePrivateCrtKeySpec with additional key parameters.

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)

keyParams - the parameters associated with key

Throws:

NullPointerException - if any of the specified parameters except otherPrimeInfo and keyParams is null

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

Since:

11

Method Details

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.