RSAMultiPrimePrivateCrtKeySpec

AI-generated Key Takeaways

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

• It extends RSAPrivateKeySpec and includes additional information like prime factors (p, q), prime exponents, and CRT coefficient.

• A new RSAMultiPrimePrivateCrtKeySpec object is created using the constructor with parameters for modulus, public exponent, private exponent, prime factors, prime exponents, CRT coefficient, and other prime info.

• Public methods allow access to the key's components such as getCrtCoefficient(), getOtherPrimeInfo(), getPrimeExponentP(), getPrimeExponentQ(), getPrimeP(), getPrimeQ(), and getPublicExponent().

• This class is useful for representing and working with RSA private keys that utilize multiple prime factors for enhanced security and performance.

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.

See Also

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

Public 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.

Public 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.

Inherited Method Summary

From class java.security.spec.RSAPrivateKeySpec

BigInteger	getModulus() Returns the modulus.
BigInteger	getPrivateExponent() Returns the private exponent.

From class java.lang.Object

Object	clone() Creates and returns a copy of this Object.
boolean	equals(Object obj) Compares this instance with the specified object and indicates if they are equal.
void	finalize() Invoked when the garbage collector has detected that this instance is no longer reachable.
final Class<?>	getClass() Returns the unique instance of Class that represents this object's class.
int	hashCode() Returns an integer hash code for this object.
final void	notify() Causes a thread which is waiting on this object's monitor (by means of calling one of the wait() methods) to be woken up.
final void	notifyAll() Causes all threads which are waiting on this object's monitor (by means of calling one of the wait() methods) to be woken up.
String	toString() Returns a string containing a concise, human-readable description of this object.
final void	wait(long timeout, int nanos) Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object or until the specified timeout expires.
final void	wait(long timeout) Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object or until the specified timeout expires.
final void	wait() Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object.

Public Constructors

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.

Public Methods

public BigInteger getCrtCoefficient ()

Returns the crtCoefficient.

Returns

• the crtCoefficient.

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.

public BigInteger getPrimeExponentP ()

Returns the primeExponentP.

Returns

• the primeExponentP.

public BigInteger getPrimeExponentQ ()

Returns the primeExponentQ.

Returns

• the primeExponentQ.

public BigInteger getPrimeP ()

Returns the primeP.

Returns

• the primeP.

public BigInteger getPrimeQ ()

Returns the primeQ.

Returns

• the primeQ.

public BigInteger getPublicExponent ()

Returns the public exponent.

Returns

• the public exponent.