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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.

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package org.bouncycastle.asn1.x509;

import java.io.IOException;
import java.util.Enumeration;

import org.bouncycastle.asn1.ASN1Encodable;
import org.bouncycastle.asn1.ASN1EncodableVector;
import org.bouncycastle.asn1.ASN1Object;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.ASN1TaggedObject;
import org.bouncycastle.asn1.DERBitString;
import org.bouncycastle.asn1.DERSequence;

/**
 * The object that contains the public key stored in a certificate.
 * 

* The getEncoded() method in the public keys in the JCE produces a DER * encoded one of these. */ public class SubjectPublicKeyInfo extends ASN1Object { private AlgorithmIdentifier algId; private DERBitString keyData; public static SubjectPublicKeyInfo getInstance( ASN1TaggedObject obj, boolean explicit) { return getInstance(ASN1Sequence.getInstance(obj, explicit)); } public static SubjectPublicKeyInfo getInstance( Object obj) { if (obj instanceof SubjectPublicKeyInfo) { return (SubjectPublicKeyInfo)obj; } else if (obj != null) { return new SubjectPublicKeyInfo(ASN1Sequence.getInstance(obj)); } return null; } public SubjectPublicKeyInfo( AlgorithmIdentifier algId, ASN1Encodable publicKey) throws IOException { this.keyData = new DERBitString(publicKey); this.algId = algId; } public SubjectPublicKeyInfo( AlgorithmIdentifier algId, byte[] publicKey) { this.keyData = new DERBitString(publicKey); this.algId = algId; } /** @deprecated use SubjectPublicKeyInfo.getInstance() */ public SubjectPublicKeyInfo( ASN1Sequence seq) { if (seq.size() != 2) { throw new IllegalArgumentException("Bad sequence size: " + seq.size()); } Enumeration e = seq.getObjects(); this.algId = AlgorithmIdentifier.getInstance(e.nextElement()); this.keyData = DERBitString.getInstance(e.nextElement()); } public AlgorithmIdentifier getAlgorithm() { return algId; } /** * @deprecated use getAlgorithm() * @return alg ID. */ public AlgorithmIdentifier getAlgorithmId() { return algId; } /** * for when the public key is an encoded object - if the bitstring * can't be decoded this routine throws an IOException. * * @exception IOException - if the bit string doesn't represent a DER * encoded object. * @return the public key as an ASN.1 primitive. */ public ASN1Primitive parsePublicKey() throws IOException { return ASN1Primitive.fromByteArray(keyData.getOctets()); } /** * for when the public key is an encoded object - if the bitstring * can't be decoded this routine throws an IOException. * * @exception IOException - if the bit string doesn't represent a DER * encoded object. * @deprecated use parsePublicKey * @return the public key as an ASN.1 primitive. */ public ASN1Primitive getPublicKey() throws IOException { return ASN1Primitive.fromByteArray(keyData.getOctets()); } /** * for when the public key is raw bits. * * @return the public key as the raw bit string... */ public DERBitString getPublicKeyData() { return keyData; } /** * Produce an object suitable for an ASN1OutputStream. *

     * SubjectPublicKeyInfo ::= SEQUENCE {
     *                          algorithm AlgorithmIdentifier,
     *                          publicKey BIT STRING }
     * 
*/ public ASN1Primitive toASN1Primitive() { ASN1EncodableVector v = new ASN1EncodableVector(); v.add(algId); v.add(keyData); return new DERSequence(v); } }




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