/* See LICENSE for licensing and NOTICE for copyright. */
package org.cryptacular.asn;
import java.io.IOException;
import org.bouncycastle.asn1.ASN1InputStream;
import org.bouncycastle.crypto.params.AsymmetricKeyParameter;
import org.bouncycastle.crypto.util.PublicKeyFactory;
import org.cryptacular.EncodingException;
import org.cryptacular.util.PemUtil;
/**
* Decodes public keys formatted in an X.509 SubjectPublicKeyInfo structure in either PEM or DER encoding.
*
* @author Middleware Services
*/
public class PublicKeyDecoder implements ASN1Decoder<AsymmetricKeyParameter>
{
@Override
public AsymmetricKeyParameter decode(final byte[] encoded, final Object... args)
{
try {
if (PemUtil.isPem(encoded)) {
return PublicKeyFactory.createKey(PemUtil.decode(encoded));
}
return PublicKeyFactory.createKey(new ASN1InputStream(encoded).readObject().getEncoded());
} catch (IOException e) {
throw new EncodingException("ASN.1 decoding error", e);
}
}
}