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package org.spongycastle.jce.provider;
import java.io.IOException;
import java.math.BigInteger;
import java.security.interfaces.RSAPublicKey;
import java.security.spec.RSAPublicKeySpec;
import org.spongycastle.asn1.ASN1Sequence;
import org.spongycastle.asn1.DERNull;
import org.spongycastle.asn1.pkcs.PKCSObjectIdentifiers;
import org.spongycastle.asn1.x509.AlgorithmIdentifier;
import org.spongycastle.asn1.x509.RSAPublicKeyStructure;
import org.spongycastle.asn1.x509.SubjectPublicKeyInfo;
import org.spongycastle.crypto.params.RSAKeyParameters;
import org.spongycastle.jcajce.provider.asymmetric.util.KeyUtil;
public class JCERSAPublicKey
implements RSAPublicKey
{
static final long serialVersionUID = 2675817738516720772L;
private BigInteger modulus;
private BigInteger publicExponent;
JCERSAPublicKey(
RSAKeyParameters key)
{
this.modulus = key.getModulus();
this.publicExponent = key.getExponent();
}
JCERSAPublicKey(
RSAPublicKeySpec spec)
{
this.modulus = spec.getModulus();
this.publicExponent = spec.getPublicExponent();
}
JCERSAPublicKey(
RSAPublicKey key)
{
this.modulus = key.getModulus();
this.publicExponent = key.getPublicExponent();
}
JCERSAPublicKey(
SubjectPublicKeyInfo info)
{
try
{
RSAPublicKeyStructure pubKey = new RSAPublicKeyStructure((ASN1Sequence)info.parsePublicKey());
this.modulus = pubKey.getModulus();
this.publicExponent = pubKey.getPublicExponent();
}
catch (IOException e)
{
throw new IllegalArgumentException("invalid info structure in RSA public key");
}
}
/**
* return the modulus.
*
* @return the modulus.
*/
public BigInteger getModulus()
{
return modulus;
}
/**
* return the public exponent.
*
* @return the public exponent.
*/
public BigInteger getPublicExponent()
{
return publicExponent;
}
public String getAlgorithm()
{
return "RSA";
}
public String getFormat()
{
return "X.509";
}
public byte[] getEncoded()
{
return KeyUtil.getEncodedSubjectPublicKeyInfo(new AlgorithmIdentifier(PKCSObjectIdentifiers.rsaEncryption, DERNull.INSTANCE), new RSAPublicKeyStructure(getModulus(), getPublicExponent()));
}
public int hashCode()
{
return this.getModulus().hashCode() ^ this.getPublicExponent().hashCode();
}
public boolean equals(Object o)
{
if (o == this)
{
return true;
}
if (!(o instanceof RSAPublicKey))
{
return false;
}
RSAPublicKey key = (RSAPublicKey)o;
return getModulus().equals(key.getModulus())
&& getPublicExponent().equals(key.getPublicExponent());
}
public String toString()
{
StringBuffer buf = new StringBuffer();
String nl = System.getProperty("line.separator");
buf.append("RSA Public Key").append(nl);
buf.append(" modulus: ").append(this.getModulus().toString(16)).append(nl);
buf.append(" public exponent: ").append(this.getPublicExponent().toString(16)).append(nl);
return buf.toString();
}
}
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