如何使用java中的bouncycastle將PrivateKeyUsage擴展添加到證書中？

Question

我有我想要擴展添加到...我要添加PrivateKeyUsage擴展的X509Certificate，但我不知道如何創建一個PrivateKeyUsage對象或如何給它notBefore & notAfter值...感謝

Answer 1

Date from = new Date(); 
Date to = new Date(System.currentTimeMillis()+ 30*1000*60*60l); 

ASN1EncodableVector v = new ASN1EncodableVector(); 
DERGeneralizedTime fromTime = new DERGeneralizedTime(from);  
v.add(new DERTaggedObject(false, 0, fromTime)); 

DERGeneralizedTime toTime = new DERGeneralizedTime(to);  
v.add(new DERTaggedObject(false, 1, toTime)); 

DERObject o = new DERSequence(v);  
PrivateKeyUsagePeriod pkup = PrivateKeyUsagePeriod.getInstance(o);  
v3CertGen.addExtension(x509Extensions.PrivateKeyUsagePeriod, false, pkup); 

Answer 2

你可以做這樣的事情，

Date notBeforeDate = new Date(); 
    Date notAfterDate = new Date(System.currentMillis() + 24L*3600*365*1000); 

    PrivateKeyUsagePeriod pkup = new PrivateKeyUsagePeriod(notBeforeDate, 
      notAfterDate); 
    V3Extension[] v3 = {pkup}; 

    cert = CertificateFactory.createCertificate(subject, kp.getPublic(), issuer, 
      kp.getPrivate(), algorithm, 1, v3);