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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.x509;

import org.bouncycastle.x509.util.StreamParser;
import org.bouncycastle.x509.util.StreamParsingException;

import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.security.NoSuchAlgorithmException;
import java.security.NoSuchProviderException;
import java.security.Provider;
import java.util.Collection;

/**
 *
 * This class allows access to different implementations for reading X.509
 * objects from streams.
 * 

* A X509StreamParser is used to read a collection of objects or a single object * of a certain X.509 object structure. E.g. one X509StreamParser can read * certificates, another one CRLs, certification paths, attribute certificates * and so on. The kind of object structure is specified with the * algorithm parameter to the getInstance methods. *

* Implementations must implement the * {@link org.bouncycastle.x509.X509StreamParserSpi}. */ public class X509StreamParser implements StreamParser { /** * Generates a StreamParser object that implements the specified type. If * the default provider package provides an implementation of the requested * type, an instance of StreamParser containing that implementation is * returned. If the type is not available in the default package, other * packages are searched. * * @param type * The name of the requested X.509 object type. * @return a StreamParser object for the specified type. * * @exception NoSuchParserException * if the requested type is not available in the default * provider package or any of the other provider packages * that were searched. */ public static X509StreamParser getInstance(String type) throws NoSuchParserException { try { X509Util.Implementation impl = X509Util.getImplementation("X509StreamParser", type); return createParser(impl); } catch (NoSuchAlgorithmException e) { throw new NoSuchParserException(e.getMessage()); } } /** * Generates a X509StreamParser object for the specified type from the * specified provider. * * @param type * the name of the requested X.509 object type. * @param provider * the name of the provider. * * @return a X509StreamParser object for the specified type. * * @exception NoSuchParserException * if the type is not available from the specified provider. * * @exception NoSuchProviderException * if the provider can not be found. * * @see Provider */ public static X509StreamParser getInstance(String type, String provider) throws NoSuchParserException, NoSuchProviderException { return getInstance(type, X509Util.getProvider(provider)); } /** * Generates a X509StreamParser object for the specified type from the * specified provider. * * @param type * the name of the requested X.509 object type. * @param provider * the Provider to use. * * @return a X509StreamParser object for the specified type. * * @exception NoSuchParserException * if the type is not available from the specified provider. * * @see Provider */ public static X509StreamParser getInstance(String type, Provider provider) throws NoSuchParserException { try { X509Util.Implementation impl = X509Util.getImplementation("X509StreamParser", type, provider); return createParser(impl); } catch (NoSuchAlgorithmException e) { throw new NoSuchParserException(e.getMessage()); } } private static X509StreamParser createParser(X509Util.Implementation impl) { X509StreamParserSpi spi = (X509StreamParserSpi)impl.getEngine(); return new X509StreamParser(impl.getProvider(), spi); } private Provider _provider; private X509StreamParserSpi _spi; private X509StreamParser( Provider provider, X509StreamParserSpi spi) { _provider = provider; _spi = spi; } public Provider getProvider() { return _provider; } public void init(InputStream stream) { _spi.engineInit(stream); } public void init(byte[] data) { _spi.engineInit(new ByteArrayInputStream(data)); } public Object read() throws StreamParsingException { return _spi.engineRead(); } public Collection readAll() throws StreamParsingException { return _spi.engineReadAll(); } }





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