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 RSAPrivateKeySpec

getModulus, getParams, getPrivateExponent

Modifier and Type	Method	Description
BigInteger	getModulus()	Returns the modulus.
AlgorithmParameterSpec	getParams()	Returns the parameters associated with this key, may be null if not present.
BigInteger	getPrivateExponent()	Returns the private exponent.

Methods declared in class Object

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

Modifier and Type	Method	Description
protected Object	clone()	Answers a new instance of the same class as the receiver, whose slots have been filled in with the values in the slots of the receiver.
boolean	equals(Object o)	Compares the argument to the receiver, and answers true if they represent the same object using a class specific comparison.
protected void	finalize()	Deprecated, for removal: This API element is subject to removal in a future version. May cause performance issues, deadlocks and hangs.
final Class<? extends Object>	getClass()	Answers the unique instance of java.lang.Class which represents the class of the receiver.
int	hashCode()	Answers an integer hash code for the receiver.
final void	notify()	Causes one thread which is waiting on the receiver to be made ready to run.
final void	notifyAll()	Causes all threads which are waiting on the receiver to be made ready to run.
String	toString()	Answers a string containing a concise, human-readable description of the receiver.
final void	wait()	Causes the thread which sent this message to be made not ready to run pending some change in the receiver (as indicated by notify or notifyAll).
final void	wait(long time)	Causes the thread which sent this message to be made not ready to run either pending some change in the receiver (as indicated by notify or notifyAll) or the expiration of the timeout.
final void	wait(long time, int frac)	Causes the thread which sent this message to be made not ready to run either pending some change in the receiver (as indicated by notify or notifyAll) or the expiration of the timeout.

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.