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package java.security.spec;

import java.math.BigInteger;

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.
Author:
Valerie Peng
See Also:
Key
KeyFactory
KeySpec
PKCS8EncodedKeySpec
RSAPrivateKeySpec
RSAPublicKeySpec
RSAOtherPrimeInfo
Since:
1.4/**
 * 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.
 *
 * @author Valerie Peng
 *
 *
 * @see java.security.Key
 * @see java.security.KeyFactory
 * @see KeySpec
 * @see PKCS8EncodedKeySpec
 * @see RSAPrivateKeySpec
 * @see RSAPublicKeySpec
 * @see RSAOtherPrimeInfo
 *
 * @since 1.4
 */

public class RSAMultiPrimePrivateCrtKeySpec extends RSAPrivateKeySpec {

    private final BigInteger publicExponent;
    private final BigInteger primeP;
    private final BigInteger primeQ;
    private final BigInteger primeExponentP;
    private final BigInteger primeExponentQ;
    private final BigInteger crtCoefficient;
    private final 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.
Params:
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./**
    * Creates a new <code>RSAMultiPrimePrivateCrtKeySpec</code>
    * given the modulus, publicExponent, privateExponent,
    * primeP, primeQ, primeExponentP, primeExponentQ,
    * crtCoefficient, and otherPrimeInfo as defined in PKCS#1 v2.1.
    *
    * <p>Note that the contents of <code>otherPrimeInfo</code>
    * are copied to protect against subsequent modification when
    * constructing this object.
    *
    * @param modulus the modulus n.
    * @param publicExponent the public exponent e.
    * @param privateExponent the private exponent d.
    * @param primeP the prime factor p of n.
    * @param primeQ the prime factor q of n.
    * @param primeExponentP this is d mod (p-1).
    * @param primeExponentQ this is d mod (q-1).
    * @param crtCoefficient the Chinese Remainder Theorem
    * coefficient q-1 mod p.
    * @param otherPrimeInfo triplets of the rest of primes, null can be
    * specified if there are only two prime factors (p and q).
    * @exception NullPointerException if any of the parameters, i.e.
    * <code>modulus</code>,
    * <code>publicExponent</code>, <code>privateExponent</code>,
    * <code>primeP</code>, <code>primeQ</code>,
    * <code>primeExponentP</code>, <code>primeExponentQ</code>,
    * <code>crtCoefficient</code>, is null.
    * @exception IllegalArgumentException if an empty, i.e. 0-length,
    * <code>otherPrimeInfo</code> is specified.
    */
    public RSAMultiPrimePrivateCrtKeySpec(BigInteger modulus,
                                BigInteger publicExponent,
                                BigInteger privateExponent,
                                BigInteger primeP,
                                BigInteger primeQ,
                                BigInteger primeExponentP,
                                BigInteger primeExponentQ,
                                BigInteger crtCoefficient,
                                RSAOtherPrimeInfo[] otherPrimeInfo) {
        super(modulus, privateExponent);
        if (modulus == null) {
            throw new NullPointerException("the modulus parameter must be " +
                                            "non-null");
        }
        if (publicExponent == null) {
            throw new NullPointerException("the publicExponent parameter " +
                                            "must be non-null");
        }
        if (privateExponent == null) {
            throw new NullPointerException("the privateExponent parameter " +
                                            "must be non-null");
        }
        if (primeP == null) {
            throw new NullPointerException("the primeP parameter " +
                                            "must be non-null");
        }
        if (primeQ == null) {
            throw new NullPointerException("the primeQ parameter " +
                                            "must be non-null");
        }
        if (primeExponentP == null) {
            throw new NullPointerException("the primeExponentP parameter " +
                                            "must be non-null");
        }
        if (primeExponentQ == null) {
            throw new NullPointerException("the primeExponentQ parameter " +
                                            "must be non-null");
        }
        if (crtCoefficient == null) {
            throw new NullPointerException("the crtCoefficient parameter " +
                                            "must be non-null");
        }
        this.publicExponent = publicExponent;
        this.primeP = primeP;
        this.primeQ = primeQ;
        this.primeExponentP = primeExponentP;
        this.primeExponentQ = primeExponentQ;
        this.crtCoefficient = crtCoefficient;
        if (otherPrimeInfo == null)  {
            this.otherPrimeInfo = null;
        } else if (otherPrimeInfo.length == 0) {
            throw new IllegalArgumentException("the otherPrimeInfo " +
                                                "parameter must not be empty");
        } else {
            this.otherPrimeInfo = otherPrimeInfo.clone();
        }
    }

    
Returns the public exponent.
Returns:
the public exponent./**
     * Returns the public exponent.
     *
     * @return the public exponent.
     */
    public BigInteger getPublicExponent() {
        return this.publicExponent;
    }

    
Returns the primeP.
Returns:
the primeP./**
     * Returns the primeP.
     *
     * @return the primeP.
     */
    public BigInteger getPrimeP() {
        return this.primeP;
    }

    
Returns the primeQ.
Returns:
the primeQ./**
     * Returns the primeQ.
     *
     * @return the primeQ.
     */
    public BigInteger getPrimeQ() {
        return this.primeQ;
    }

    
Returns the primeExponentP.
Returns:
the primeExponentP./**
     * Returns the primeExponentP.
     *
     * @return the primeExponentP.
     */
    public BigInteger getPrimeExponentP() {
        return this.primeExponentP;
    }

    
Returns the primeExponentQ.
Returns:
the primeExponentQ./**
     * Returns the primeExponentQ.
     *
     * @return the primeExponentQ.
     */
    public BigInteger getPrimeExponentQ() {
        return this.primeExponentQ;
    }

    
Returns the crtCoefficient.
Returns:
the crtCoefficient./**
     * Returns the crtCoefficient.
     *
     * @return the crtCoefficient.
     */
    public BigInteger getCrtCoefficient() {
        return this.crtCoefficient;
    }

    
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./**
     * Returns a copy of the otherPrimeInfo or null if there are
     * only two prime factors (p and q).
     *
     * @return the otherPrimeInfo. Returns a new array each
     * time this method is called.
     */
    public RSAOtherPrimeInfo[] getOtherPrimeInfo() {
        if (otherPrimeInfo == null) return null;
        return otherPrimeInfo.clone();
    }
}