java - 如何在 java 中使用 bouncycaSTLe 将 PrivateKeyUsage 扩展添加到证书？

Question

我有一个 X509Certificate，我想添加扩展...我想添加 PrivateKeyUsage 扩展，但我不知道如何创建 PrivateKeyUsage 对象或如何给它 notBefore 和 notAfter 值...谢谢

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);