Java tutorial
package org.bouncycastle.asn1.pkcs; import org.bouncycastle.asn1.ASN1EncodableVector; import org.bouncycastle.asn1.ASN1Object; import org.bouncycastle.asn1.ASN1Primitive; import org.bouncycastle.asn1.ASN1Sequence; import org.bouncycastle.asn1.DERBitString; import org.bouncycastle.asn1.DERSequence; import org.bouncycastle.asn1.x509.AlgorithmIdentifier; /** * PKCS10 Certification request object. * <pre> * CertificationRequest ::= SEQUENCE { * certificationRequestInfo CertificationRequestInfo, * signatureAlgorithm AlgorithmIdentifier{{ SignatureAlgorithms }}, * signature BIT STRING * } * </pre> */ public class CertificationRequest extends ASN1Object { protected CertificationRequestInfo reqInfo = null; protected AlgorithmIdentifier sigAlgId = null; protected DERBitString sigBits = null; public static CertificationRequest getInstance(Object o) { if (o instanceof CertificationRequest) { return (CertificationRequest) o; } if (o != null) { return new CertificationRequest(ASN1Sequence.getInstance(o)); } return null; } protected CertificationRequest() { } public CertificationRequest(CertificationRequestInfo requestInfo, AlgorithmIdentifier algorithm, DERBitString signature) { this.reqInfo = requestInfo; this.sigAlgId = algorithm; this.sigBits = signature; } /** * @deprecated use getInstance() */ public CertificationRequest(ASN1Sequence seq) { reqInfo = CertificationRequestInfo.getInstance(seq.getObjectAt(0)); sigAlgId = AlgorithmIdentifier.getInstance(seq.getObjectAt(1)); sigBits = (DERBitString) seq.getObjectAt(2); } public CertificationRequestInfo getCertificationRequestInfo() { return reqInfo; } public AlgorithmIdentifier getSignatureAlgorithm() { return sigAlgId; } public DERBitString getSignature() { return sigBits; } public ASN1Primitive toASN1Primitive() { // Construct the CertificateRequest ASN1EncodableVector v = new ASN1EncodableVector(3); v.add(reqInfo); v.add(sigAlgId); v.add(sigBits); return new DERSequence(v); } }