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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 & notAfter 值...谢谢

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2 回答 2

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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);
于 2010-06-22T10:19:57.693 回答
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你可以做这样的事情,

    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);
于 2010-06-21T15:06:55.010 回答