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Spongy Castle is a package-rename (org.bouncycastle.* to org.spongycastle.*) of Bouncy Castle intended for Android.
Android ships with a stripped-down version of Bouncy Castle - this causes classloader collisions if you try to add
an alternative (updated/complete) Bouncy Castle jar.
This jar contains JCE provider and lightweight API for the Bouncy Castle Cryptography APIs for JDK 1.5.
package org.spongycastle.x509;
import java.io.IOException;
import java.security.cert.CertificateEncodingException;
import java.security.cert.CertificateParsingException;
import java.security.cert.X509Certificate;
import org.spongycastle.asn1.ASN1InputStream;
import org.spongycastle.asn1.x509.CertificatePair;
import org.spongycastle.asn1.x509.X509CertificateStructure;
import org.spongycastle.jce.provider.X509CertificateObject;
/**
* This class contains a cross certificate pair. Cross certificates pairs may
* contain two cross signed certificates from two CAs. A certificate from the
* other CA to this CA is contained in the forward certificate, the certificate
* from this CA to the other CA is contained in the reverse certificate.
*/
public class X509CertificatePair
{
private X509Certificate forward;
private X509Certificate reverse;
/**
* Constructor.
*
* @param forward Certificate from the other CA to this CA.
* @param reverse Certificate from this CA to the other CA.
*/
public X509CertificatePair(
X509Certificate forward,
X509Certificate reverse)
{
this.forward = forward;
this.reverse = reverse;
}
/**
* Constructor from a ASN.1 CertificatePair structure.
*
* @param pair The CertificatePair ASN.1 object.
*/
public X509CertificatePair(
CertificatePair pair)
throws CertificateParsingException
{
if (pair.getForward() != null)
{
this.forward = new X509CertificateObject(pair.getForward());
}
if (pair.getReverse() != null)
{
this.reverse = new X509CertificateObject(pair.getReverse());
}
}
public byte[] getEncoded()
throws CertificateEncodingException
{
X509CertificateStructure f = null;
X509CertificateStructure r = null;
try
{
if (forward != null)
{
f = X509CertificateStructure.getInstance(new ASN1InputStream(
forward.getEncoded()).readObject());
if (f == null)
{
throw new CertificateEncodingException("unable to get encoding for forward");
}
}
if (reverse != null)
{
r = X509CertificateStructure.getInstance(new ASN1InputStream(
reverse.getEncoded()).readObject());
if (r == null)
{
throw new CertificateEncodingException("unable to get encoding for reverse");
}
}
return new CertificatePair(f, r).getDEREncoded();
}
catch (IllegalArgumentException e)
{
throw new ExtCertificateEncodingException(e.toString(), e);
}
catch (IOException e)
{
throw new ExtCertificateEncodingException(e.toString(), e);
}
}
/**
* Returns the certificate from the other CA to this CA.
*
* @return Returns the forward certificate.
*/
public X509Certificate getForward()
{
return forward;
}
/**
* Return the certificate from this CA to the other CA.
*
* @return Returns the reverse certificate.
*/
public X509Certificate getReverse()
{
return reverse;
}
public boolean equals(Object o)
{
if (o == null)
{
return false;
}
if (!(o instanceof X509CertificatePair))
{
return false;
}
X509CertificatePair pair = (X509CertificatePair)o;
boolean equalReverse = true;
boolean equalForward = true;
if (forward != null)
{
equalForward = this.forward.equals(pair.forward);
}
else
{
if (pair.forward != null)
{
equalForward = false;
}
}
if (reverse != null)
{
equalReverse = this.reverse.equals(pair.reverse);
}
else
{
if (pair.reverse != null)
{
equalReverse = false;
}
}
return equalForward && equalReverse;
}
public int hashCode()
{
int hash = -1;
if (forward != null)
{
hash ^= forward.hashCode();
}
if (reverse != null)
{
hash *= 17;
hash ^= reverse.hashCode();
}
return hash;
}
}