检测安装的证书在我的Android设备 [英] Detect installed certificate in my android device

问题描述

我在应用程序启动时在我的应用程序中安装证书。我已通过以下几个链接，并成功安装证书。

• http://nelenkov.blogspot.in/2011/12/ics-trust-store-implementation.html p>




• http://pastebin.com/Bn6qSYHx




• 如何以编程方式在Android中安装CA证书（用于EAP WiFi配置）




• 如何在Android上以编程方式安装CA证书，无需用户交互

我知道我们无法在没有用户交互的情况下静默安装证书。目前我不知道如何停止提示时间用户打开我的应用程序。

每当我的应用程序启动时，每次它要求用户安装证书。是否有某种方式可以通过编程方式检测证书（在这种情况下是我的证书）是否已经安装。

我在我的应用程序中安装证书的代码段

  private void installCertificate（）
 {
 try 
 {
 BufferedInputStream bis = new BufferedInputStream（getAssets（）。open（MY_CERT））; 
 byte [] keychain = new byte [bis.available（）]; 
 bis.read（keychain）; 
 
 Intent installIntent = KeyChain.createInstallIntent（）; 
 X509Certificate x509 = X509Certificate.getInstance（keychain）; 
 installIntent.putExtra（KeyChain.EXTRA_CERTIFICATE，x509.getEncoded（））; 
 installIntent.putExtra（KeyChain.EXTRA_NAME，MY_CERT）; 
 startActivityForResult（installIntent，INSTALL_KEYCHAIN_CODE）; 
} 
 catch（IOException e）{
 e.printStackTrace（）; 
} 
 catch（CertificateException e）
 {
 e.printStackTrace（）; 
} 
} 
 
 @Override 
 protected void onActivityResult（int requestCode，int resultCode，Intent data）
 {
 if（requestCode = = INSTALL_KEYCHAIN_CODE）
 {
 switch（resultCode）
 {
 case Activity.RESULT_OK：
 doTheTask（）; 
 break; 
 case Activity.RESULT_CANCELED：
 finish（）; 
 break; 
默认值：
 super.onActivityResult（requestCode，resultCode，data）; 
} 
} 
} 
  

<是从onCreate（）调用。

请帮助我。

选择和改变方向切换/复制选项。任何机构知道如何在提示时停止文本选择？

解决方案

证书是否已安装

  try 
 {
 KeyStore ks = KeyStore.getInstance（AndroidCAStore） ; 
 if（ks！= null）
 {
 ks.load（null，null）; 
枚举aliases = ks.aliases（）; 
 while（aliases.hasMoreElements（））
 {
 String alias =（String）aliases.nextElement（）; 
 java.security.cert.X509Certificate cert =（java.security.cert.X509Certificate）ks.getCertificate（alias）; 
 
 if（cert.getIssuerDN（）。getName（）。contains（MyCert））
 {
 isCertExist = true; 
 break; 
} 
} 
} 
} catch（IOException e）{
 e.printStackTrace（）; 
} catch（KeyStoreException e）{
 e.printStackTrace（）; 
} catch（NoSuchAlgorithmException e）{
 e.printStackTrace（）; 
} catch（java.security.cert.CertificateException e）{
 e.printStackTrace（）; 
} 
  

I am installing a certificate in my application when application starts. I have gone through few of the links as below and successfully install the certificate.

• http://nelenkov.blogspot.in/2011/12/ics-trust-store-implementation.html

• http://pastebin.com/Bn6qSYHx

• How to programmatically install a CA Certificate (for EAP WiFi configuration) in Android?

• how to install CA certificate programmatically on Android without user interaction

I came to know we cannot install the certificate silently without user interaction.Currently I don't know how to stop prompt each time user open my app.

Whenever my application starts currently every time it ask user to install certificate. Is there some way I can detect whether a certificate(in this case my certificate) is already installed or not, programmatically.

Code snippet where I have installing certificate in my app

private void installCertificate()
    {
        try 
        {
            BufferedInputStream bis = new BufferedInputStream(getAssets().open(MY_CERT));
            byte[] keychain = new byte[bis.available()];
            bis.read(keychain);

            Intent installIntent = KeyChain.createInstallIntent();
            X509Certificate x509 = X509Certificate.getInstance(keychain);
            installIntent.putExtra(KeyChain.EXTRA_CERTIFICATE, x509.getEncoded());
            installIntent.putExtra(KeyChain.EXTRA_NAME, MY_CERT);
            startActivityForResult(installIntent, INSTALL_KEYCHAIN_CODE);
        }
        catch (IOException e) {
            e.printStackTrace();
        }
        catch (CertificateException e) 
        {
            e.printStackTrace();
        }
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) 
    {
        if (requestCode == INSTALL_KEYCHAIN_CODE) 
        {
            switch (resultCode) 
            {  
                case Activity.RESULT_OK:
                    doTheTask();
                    break;
                case Activity.RESULT_CANCELED:
                    finish();
                    break;                  
                default:
                    super.onActivityResult(requestCode, resultCode, data);
            }
        }
    }

Also FYI, installCertificate() is called from onCreate().

Please help me out for the same. Any help will appreciated.

---

Query: When prompt comes for certificate name, entered text comes as selected and on orientation change cut/copy option comes. Any body knows how to stop text selection when prompt comes?!!!

解决方案

I used below piece of code to check whether my certificate is installed or not

try 
        {
            KeyStore ks = KeyStore.getInstance("AndroidCAStore");
            if (ks != null) 
            {
                ks.load(null, null);
                Enumeration aliases = ks.aliases();
                while (aliases.hasMoreElements()) 
                {
                    String alias = (String) aliases.nextElement();
                    java.security.cert.X509Certificate cert = (java.security.cert.X509Certificate) ks.getCertificate(alias);

                    if (cert.getIssuerDN().getName().contains("MyCert")) 
                    {
                        isCertExist = true;
                        break;
                    }
                }
            }
        } catch (IOException e) {
            e.printStackTrace();
        } catch (KeyStoreException e) {
            e.printStackTrace();
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (java.security.cert.CertificateException e) {
            e.printStackTrace();
        }

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