在Android的证书分析器 | 在Android的证书分析器

本文介绍了在Android的证书分析器的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我不知道如果我错过了一些片code本example.I我得到编译时错误的certHeader，certFooter在这个class.IF有人可以给我一下一个简短的想法会有所帮助。或者如果有人对证书的解析器一个更好的例子，这将是有益的。我用这个例子来分析证书。

 尝试
{
    字符串ABC =----- BEGIN CERTIFICATE ----- \ N+ALneIwerZ5Nu + z1Yjvdco9sOHfkhYW4nL + FIlGDGIS + YsyevB8YN2hBnog7gtQ6PB + sVF6o / 1UdU \ N+ //删除线为简便起见，rchFUEChHZ5G7AAk02K7 / iyqITc / IPNHHpilTg / NB6QhF9s = \ N+----- END CERTIFICATE -----;

INT headerIndex = abc.indexOf（certHeader）;
    如果（headerIndex == -1）
    {
        抛出新CertificateParsingException（找不到BEGIN CERTIFICATE）;
        }
    INT的startIndex = headerIndex + certHeader.length（）;

INT endIndex的= abc.indexOf（certFooter）;
如果（endIndex的== -1）
{
    抛出新CertificateParsingException（找不到END CERTIFICATE）; }

字符串证书= abc.substring（在startIndex，endIndex的）;
byte []的certBytes = cert.getBytes（）;

InputStream的时间=新Base64InputStream（新ByteArrayInputStream的（certBytes））;

CertificateFactory certFact = CertificateFactory.getInstance（X.509）;
证书certGen = certFact.generateCertificate（上）;
X509证书X509 =（x509证书）
certGen;
}
赶上（例外五）
{
    Log.e（testapp，异常：+ e.getMessage（））;
    }

解决方案

certHeader 和 certFooter 应该是INT变量。从你所告诉我们，它并不像你在任何地方宣称他们。

从 String.indexOf 文档

I wonder if I am missing some piece of code in this example.I am getting compile-time error on certHeader,certFooter in this class.IF someone can give me a brief idea about it that will be helpful.or IF some one has a better example on certificate parser that will be helpful.I am using this example to parse a certificate.

try
{
    String abc = "-----BEGIN CERTIFICATE-----\n" + "ALneIwerZ5Nu+z1Yjvdco9sOHfkhYW4nL+FIlGDGIS +YsyevB8YN2hBnog7gtQ6PB+sVF6o/1UdU\n" + // lines deleted for brevity "rchFUEChHZ5G7AAk02K7/iyqITc/IPNHHpilTg/NB6QhF9s=\n" + "-----END CERTIFICATE-----";

int headerIndex = abc.indexOf(certHeader);
    if (headerIndex == -1)
    {
        throw new CertificateParsingException("cannot find BEGIN CERTIFICATE");
        }
    int startIndex = headerIndex + certHeader.length();

int endIndex = abc.indexOf(certFooter);
if (endIndex == -1)
{
    throw new CertificateParsingException("cannot find END CERTIFICATE"); }

String cert = abc.substring(startIndex, endIndex);
byte[] certBytes = cert.getBytes();

InputStream in = new Base64InputStream(new ByteArrayInputStream(certBytes));

CertificateFactory certFact = CertificateFactory.getInstance ("X.509");
Certificate certGen = certFact.generateCertificate(in);
X509Certificate x509 = (X509Certificate)
certGen;
}
catch (Exception e)
{
    Log.e("testapp", "exception: " + e.getMessage());
    }

解决方案

certHeader and certFooter are supposed to be int variables. From what you've shown us, it doesn't look like you've declared them anywhere.

From the String.indexOf documentation:

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