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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.
package org.bouncycastle.crypto.tls;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Vector;
import org.bouncycastle.asn1.ASN1Encoding;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.x500.X500Name;
/**
* Parsing and encoding of a CertificateRequest struct from RFC 4346.
*
* struct {
* ClientCertificateType certificate_types<1..2^8-1>;
* DistinguishedName certificate_authorities<3..2^16-1>;
* } CertificateRequest;
*
*
* @see ClientCertificateType
* @see X500Name
*
* @deprecated Migrate to the (D)TLS API in org.bouncycastle.tls (bctls jar).
*/
public class CertificateRequest
{
protected short[] certificateTypes;
protected Vector supportedSignatureAlgorithms;
protected Vector certificateAuthorities;
/**
* @param certificateTypes see {@link ClientCertificateType} for valid constants.
* @param certificateAuthorities a {@link Vector} of {@link X500Name}.
*/
public CertificateRequest(short[] certificateTypes, Vector supportedSignatureAlgorithms, Vector certificateAuthorities)
{
this.certificateTypes = certificateTypes;
this.supportedSignatureAlgorithms = supportedSignatureAlgorithms;
this.certificateAuthorities = certificateAuthorities;
}
/**
* @return an array of certificate types
* @see ClientCertificateType
*/
public short[] getCertificateTypes()
{
return certificateTypes;
}
/**
* @return a {@link Vector} of {@link SignatureAndHashAlgorithm} (or null before TLS 1.2).
*/
public Vector getSupportedSignatureAlgorithms()
{
return supportedSignatureAlgorithms;
}
/**
* @return a {@link Vector} of {@link X500Name}
*/
public Vector getCertificateAuthorities()
{
return certificateAuthorities;
}
/**
* Encode this {@link CertificateRequest} to an {@link OutputStream}.
*
* @param output the {@link OutputStream} to encode to.
* @throws IOException
*/
public void encode(OutputStream output)
throws IOException
{
if (certificateTypes == null || certificateTypes.length == 0)
{
TlsUtils.writeUint8(0, output);
}
else
{
TlsUtils.writeUint8ArrayWithUint8Length(certificateTypes, output);
}
if (supportedSignatureAlgorithms != null)
{
// TODO Check whether SignatureAlgorithm.anonymous is allowed here
TlsUtils.encodeSupportedSignatureAlgorithms(supportedSignatureAlgorithms, false, output);
}
if (certificateAuthorities == null || certificateAuthorities.isEmpty())
{
TlsUtils.writeUint16(0, output);
}
else
{
Vector derEncodings = new Vector(certificateAuthorities.size());
int totalLength = 0;
for (int i = 0; i < certificateAuthorities.size(); ++i)
{
X500Name certificateAuthority = (X500Name)certificateAuthorities.elementAt(i);
byte[] derEncoding = certificateAuthority.getEncoded(ASN1Encoding.DER);
derEncodings.addElement(derEncoding);
totalLength += derEncoding.length + 2;
}
TlsUtils.checkUint16(totalLength);
TlsUtils.writeUint16(totalLength, output);
for (int i = 0; i < derEncodings.size(); ++i)
{
byte[] derEncoding = (byte[])derEncodings.elementAt(i);
TlsUtils.writeOpaque16(derEncoding, output);
}
}
}
/**
* Parse a {@link CertificateRequest} from an {@link InputStream}.
*
* @param context
* the {@link TlsContext} of the current connection.
* @param input
* the {@link InputStream} to parse from.
* @return a {@link CertificateRequest} object.
* @throws IOException
*/
public static CertificateRequest parse(TlsContext context, InputStream input)
throws IOException
{
int numTypes = TlsUtils.readUint8(input);
short[] certificateTypes = new short[numTypes];
for (int i = 0; i < numTypes; ++i)
{
certificateTypes[i] = TlsUtils.readUint8(input);
}
Vector supportedSignatureAlgorithms = null;
if (TlsUtils.isTLSv12(context))
{
// TODO Check whether SignatureAlgorithm.anonymous is allowed here
supportedSignatureAlgorithms = TlsUtils.parseSupportedSignatureAlgorithms(false, input);
}
Vector certificateAuthorities = new Vector();
byte[] certAuthData = TlsUtils.readOpaque16(input);
ByteArrayInputStream bis = new ByteArrayInputStream(certAuthData);
while (bis.available() > 0)
{
byte[] derEncoding = TlsUtils.readOpaque16(bis);
ASN1Primitive asn1 = TlsUtils.readDERObject(derEncoding);
certificateAuthorities.addElement(X500Name.getInstance(asn1));
}
return new CertificateRequest(certificateTypes, supportedSignatureAlgorithms, certificateAuthorities);
}
}
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