RSAPrivateCrtKeySpec

AI-generated Key Takeaways

• RSAPrivateCrtKeySpec specifies an RSA private key using the Chinese Remainder Theorem (CRT) for efficiency.

• It extends RSAPrivateKeySpec and includes CRT-specific parameters like primeP, primeQ, and crtCoefficient.

• This class provides methods to access all key components including modulus, publicExponent, privateExponent, and CRT values.

• A constructor is available to create an RSAPrivateCrtKeySpec instance with all necessary parameters.

• It's used with KeyFactory to convert between key specifications and key objects.

public class RSAPrivateCrtKeySpec extends RSAPrivateKeySpec

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

See Also

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

Public Constructor Summary

RSAPrivateCrtKeySpec(BigInteger modulus, BigInteger publicExponent, BigInteger privateExponent, BigInteger primeP, BigInteger primeQ, BigInteger primeExponentP, BigInteger primeExponentQ, BigInteger crtCoefficient) Creates a new RSAPrivateCrtKeySpec given the modulus, publicExponent, privateExponent, primeP, primeQ, primeExponentP, primeExponentQ, and crtCoefficient as defined in PKCS#1.

Public Method Summary

BigInteger	getCrtCoefficient() Returns the crtCoefficient.
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 RSAPrivateCrtKeySpec (BigInteger modulus, BigInteger publicExponent, BigInteger privateExponent, BigInteger primeP, BigInteger primeQ, BigInteger primeExponentP, BigInteger primeExponentQ, BigInteger crtCoefficient)

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

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

Public Methods

public BigInteger getCrtCoefficient ()

Returns the crtCoefficient.

Returns

• the crtCoefficient

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