相关疑难解决方法(0)

我正在尝试针对java密钥库验证证书,这是我使用的代码如下所示.如果它成功完成,那么我认为验证已经正确完成,否则如果抛出异常,则验证失败.我担心的是:

以下代码是否足以验证证书？因为我在这里缺少一些东西(比如检查计算机签署的数据给我发送证书？)？2.是否应核实证书中包含的签名？如果有,怎么样？

在此先感谢您的回复!普拉迪普

// To check the validity of the dates
cert.checkValidity();
//Check the chain
CertificateFactory cf = CertificateFactory.getInstance("X.509");
List<X509Certificate> mylist = new ArrayList<X509Certificate>();          
mylist.add(cert);
CertPath cp = cf.generateCertPath(mylist);
PKIXParameters params = new PKIXParameters(getTrustStore());
params.setRevocationEnabled(false);
CertPathValidator cpv =
      CertPathValidator.getInstance(CertPathValidator.getDefaultType());
PKIXCertPathValidatorResult pkixCertPathValidatorResult =
      (PKIXCertPathValidatorResult) cpv.validate(cp, params);

我正在尝试使用outputstream从URL保存文件.该URL由https保护.所以当我尝试获取以下文件时出现了一些错误

javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
at sun.security.ssl.Alerts.getSSLException(Unknown Source)
at sun.security.ssl.SSLSocketImpl.fatal(Unknown Source)
at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
at sun.security.ssl.ClientHandshaker.serverCertificate(Unknown Source)
at sun.security.ssl.ClientHandshaker.processMessage(Unknown Source)
at java.net.URL.openStream(Unknown Source) 
Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
    at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source)
    at java.security.cert.CertPathBuilder.build(Unknown Source)
    ... 60 more

假设我想从这个URL打开文件

https://www.filepicker.io/api/file/KW9EJhYtS6y48Whm2S6D?signature=4098f262b9dba23e4766ce127353aaf4f37fde0fd726d164d944e031fd862c18&policy=eyJoYW5kbGUiOiJLVzlFSmhZdFM2eTQ4V2htMlM2RCIsImV4cGlyeSI6MTUwODE0MTUwNH0=

所以我做了类似的事情:

try{    
    URL URL = new URL('https://www.filepicker.io/api/file/KW9EJhYtS6y48Whm2S6D?signature=4098f262b9dba23e4766ce127353aaf4f37fde0fd726d164d944e031fd862c18&policy=eyJoYW5kbGUiOiJLVzlFSmhZdFM2eTQ4V2htMlM2RCIsImV4cGlyeSI6MTUwODE0MTUwNH0=');
    String = path = "D://download/";
    InputStream ins = url.openStream();
    OutputStream ous = …