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The Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms. This jar contains JCE provider and lightweight API for the Bouncy Castle Cryptography APIs for JDK 1.5 to JDK 1.8. Note: this package includes the NTRU encryption algorithms.
package org.bouncycastle.jce.provider;
import java.io.IOException;
import java.math.BigInteger;
import java.security.interfaces.RSAPrivateCrtKey;
import java.security.spec.RSAPrivateCrtKeySpec;
import org.bouncycastle.asn1.DERNull;
import org.bouncycastle.asn1.pkcs.PKCSObjectIdentifiers;
import org.bouncycastle.asn1.pkcs.PrivateKeyInfo;
import org.bouncycastle.asn1.pkcs.RSAPrivateKey;
import org.bouncycastle.asn1.x509.AlgorithmIdentifier;
import org.bouncycastle.crypto.params.RSAPrivateCrtKeyParameters;
import org.bouncycastle.jcajce.provider.asymmetric.util.KeyUtil;
import org.bouncycastle.util.Strings;
/**
* A provider representation for a RSA private key, with CRT factors included.
*/
public class JCERSAPrivateCrtKey
extends JCERSAPrivateKey
implements RSAPrivateCrtKey
{
static final long serialVersionUID = 7834723820638524718L;
private BigInteger publicExponent;
private BigInteger primeP;
private BigInteger primeQ;
private BigInteger primeExponentP;
private BigInteger primeExponentQ;
private BigInteger crtCoefficient;
/**
* construct a private key from it's org.bouncycastle.crypto equivalent.
*
* @param key the parameters object representing the private key.
*/
JCERSAPrivateCrtKey(
RSAPrivateCrtKeyParameters key)
{
super(key);
this.publicExponent = key.getPublicExponent();
this.primeP = key.getP();
this.primeQ = key.getQ();
this.primeExponentP = key.getDP();
this.primeExponentQ = key.getDQ();
this.crtCoefficient = key.getQInv();
}
/**
* construct a private key from an RSAPrivateCrtKeySpec
*
* @param spec the spec to be used in construction.
*/
JCERSAPrivateCrtKey(
RSAPrivateCrtKeySpec spec)
{
this.modulus = spec.getModulus();
this.publicExponent = spec.getPublicExponent();
this.privateExponent = spec.getPrivateExponent();
this.primeP = spec.getPrimeP();
this.primeQ = spec.getPrimeQ();
this.primeExponentP = spec.getPrimeExponentP();
this.primeExponentQ = spec.getPrimeExponentQ();
this.crtCoefficient = spec.getCrtCoefficient();
}
/**
* construct a private key from another RSAPrivateCrtKey.
*
* @param key the object implementing the RSAPrivateCrtKey interface.
*/
JCERSAPrivateCrtKey(
RSAPrivateCrtKey key)
{
this.modulus = key.getModulus();
this.publicExponent = key.getPublicExponent();
this.privateExponent = key.getPrivateExponent();
this.primeP = key.getPrimeP();
this.primeQ = key.getPrimeQ();
this.primeExponentP = key.getPrimeExponentP();
this.primeExponentQ = key.getPrimeExponentQ();
this.crtCoefficient = key.getCrtCoefficient();
}
/**
* construct an RSA key from a private key info object.
*/
JCERSAPrivateCrtKey(
PrivateKeyInfo info)
throws IOException
{
this(org.bouncycastle.asn1.pkcs.RSAPrivateKey.getInstance(info.parsePrivateKey()));
}
/**
* construct an RSA key from a ASN.1 RSA private key object.
*/
JCERSAPrivateCrtKey(
RSAPrivateKey key)
{
this.modulus = key.getModulus();
this.publicExponent = key.getPublicExponent();
this.privateExponent = key.getPrivateExponent();
this.primeP = key.getPrime1();
this.primeQ = key.getPrime2();
this.primeExponentP = key.getExponent1();
this.primeExponentQ = key.getExponent2();
this.crtCoefficient = key.getCoefficient();
}
/**
* return the encoding format we produce in getEncoded().
*
* @return the encoding format we produce in getEncoded().
*/
public String getFormat()
{
return "PKCS#8";
}
/**
* Return a PKCS8 representation of the key. The sequence returned
* represents a full PrivateKeyInfo object.
*
* @return a PKCS8 representation of the key.
*/
public byte[] getEncoded()
{
return KeyUtil.getEncodedPrivateKeyInfo(new AlgorithmIdentifier(PKCSObjectIdentifiers.rsaEncryption, DERNull.INSTANCE), new RSAPrivateKey(getModulus(), getPublicExponent(), getPrivateExponent(), getPrimeP(), getPrimeQ(), getPrimeExponentP(), getPrimeExponentQ(), getCrtCoefficient()));
}
/**
* return the public exponent.
*
* @return the public exponent.
*/
public BigInteger getPublicExponent()
{
return publicExponent;
}
/**
* return the prime P.
*
* @return the prime P.
*/
public BigInteger getPrimeP()
{
return primeP;
}
/**
* return the prime Q.
*
* @return the prime Q.
*/
public BigInteger getPrimeQ()
{
return primeQ;
}
/**
* return the prime exponent for P.
*
* @return the prime exponent for P.
*/
public BigInteger getPrimeExponentP()
{
return primeExponentP;
}
/**
* return the prime exponent for Q.
*
* @return the prime exponent for Q.
*/
public BigInteger getPrimeExponentQ()
{
return primeExponentQ;
}
/**
* return the CRT coefficient.
*
* @return the CRT coefficient.
*/
public BigInteger getCrtCoefficient()
{
return crtCoefficient;
}
public int hashCode()
{
return this.getModulus().hashCode()
^ this.getPublicExponent().hashCode()
^ this.getPrivateExponent().hashCode();
}
public boolean equals(Object o)
{
if (o == this)
{
return true;
}
if (!(o instanceof RSAPrivateCrtKey))
{
return false;
}
RSAPrivateCrtKey key = (RSAPrivateCrtKey)o;
return this.getModulus().equals(key.getModulus())
&& this.getPublicExponent().equals(key.getPublicExponent())
&& this.getPrivateExponent().equals(key.getPrivateExponent())
&& this.getPrimeP().equals(key.getPrimeP())
&& this.getPrimeQ().equals(key.getPrimeQ())
&& this.getPrimeExponentP().equals(key.getPrimeExponentP())
&& this.getPrimeExponentQ().equals(key.getPrimeExponentQ())
&& this.getCrtCoefficient().equals(key.getCrtCoefficient());
}
public String toString()
{
StringBuffer buf = new StringBuffer();
String nl = Strings.lineSeparator();
buf.append("RSA Private CRT Key").append(nl);
buf.append(" modulus: ").append(this.getModulus().toString(16)).append(nl);
buf.append(" public exponent: ").append(this.getPublicExponent().toString(16)).append(nl);
buf.append(" private exponent: ").append(this.getPrivateExponent().toString(16)).append(nl);
buf.append(" primeP: ").append(this.getPrimeP().toString(16)).append(nl);
buf.append(" primeQ: ").append(this.getPrimeQ().toString(16)).append(nl);
buf.append(" primeExponentP: ").append(this.getPrimeExponentP().toString(16)).append(nl);
buf.append(" primeExponentQ: ").append(this.getPrimeExponentQ().toString(16)).append(nl);
buf.append(" crtCoefficient: ").append(this.getCrtCoefficient().toString(16)).append(nl);
return buf.toString();
}
}