Trust anchor for certification path not found как исправить

I am answering to this to give an idea about the scenario and solution as per the android developer site for others benefit. I have solved this using custom trust manager.

The problem was with the server certificate, it misses intermediate certificate authority. However with the first flow certificate path is completed somehow and result was successful certificate path validation.

There is a solution for this in android developer site. it suggest to use custom trust manager that trusts this server certificate or it suggest to server to include the intermediate CA in the server chain.

custom trust manager. source: https://developer.android.com/training/articles/security-ssl.html#UnknownCa

// Load CAs from an InputStream
// (could be from a resource or ByteArrayInputStream or ...)
CertificateFactory cf = CertificateFactory.getInstance("X.509");
// From https://www.washington.edu/itconnect/security/ca/load-der.crt
InputStream caInput = new BufferedInputStream(new FileInputStream("load-der.crt"));
Certificate ca;
try {
    ca = cf.generateCertificate(caInput);
    System.out.println("ca=" + ((X509Certificate) ca).getSubjectDN());
} finally {
    caInput.close();
}

// Create a KeyStore containing our trusted CAs
String keyStoreType = KeyStore.getDefaultType();
KeyStore keyStore = KeyStore.getInstance(keyStoreType);
keyStore.load(null, null);
keyStore.setCertificateEntry("ca", ca);

// Create a TrustManager that trusts the CAs in our KeyStore
String tmfAlgorithm = TrustManagerFactory.getDefaultAlgorithm();
TrustManagerFactory tmf = TrustManagerFactory.getInstance(tmfAlgorithm);
tmf.init(keyStore);

// Create an SSLContext that uses our TrustManager
SSLContext context = SSLContext.getInstance("TLS");
context.init(null, tmf.getTrustManagers(), null);
// Tell the okhttp to use a SocketFactory from our SSLContext
OkHttpClient okHttpClient client = new OkHttpClient.Builder().sslSocketFactory(context.getSocketFactory()).build();

UPDATE: My problem was solved after intermediate certificate authority added to the certificate chain from the server side. It is the best solution, Bundling the certificate with the app requires app to be updated on certificate expiring or any other issues related with certificate management.

UPDATE:03/09/2017 Easiest way to load certificate file I found is use of raw resource.

InputStream caInput = new BufferedInputStream(context
                .getResources().openRawResource(R.raw.certfilename));

where certfilename is the certificate file placed in resources/raw folder. Also okhttp’s sslSocketFactory(SSLSocketFactory sslSocketFactory) has been deprecated and suggested approach in the okhttp api doc can be used.

Also when getting the certificate from the server it is better to use openssl.

openssl s_client -connect {server-address}:{port} -showcerts

Because I used to grab that from firefox and faced situation where it was altered by the virus guard.

The trust anchor for certification path not found Android emulator error appears due to invalid or broken user certificates in the server configuration. As a result, you cannot access the trust anchor via the certification path because your program does not recognize the location or certificates that grant permission.

Fortunately, we found several debugging methods that remove the trust anchor for certification path not found Charles exception without causing further complications or inconveniences. In addition, we will help you recreate the trust anchor for certification path not found localhost bug using typical elements, which will help you troubleshoot the script.

What Causes the Trust Anchor for Certification Path Not Found Error?

Incorrect or broken user certificates in the configuration usually cause the trust anchor for certification path not found Kotlin bug. An identical code exception also pops up on your screen due to a misconfiguration with the web server configuration files because they are related to adequate certificates.

As you can tell, the trust anchor for certification path not found Android self-signed mistake can obliterate your programming experience when working with complex files. Therefore, avoiding the error is only possible with adequate user certificates in the server configurations.

Unfortunately, the trust anchor for certification path not found. Android 7 exception launches many indicators where the project fails and which routes are distorted. Luckily, we will use the incorrect messages to troubleshoot the program, pinpoint the forgotten certification paths, and apply the debugging principles.

For instance, we confirmed the trust anchor for certification path not found. Android 6 error when connecting to an Apache server with invalid certificates. Although this process is usually full-proof and does not yield mistakes, it can affect your certificates and force the system to fail due to specific server misconfigurations.

Unfortunately, you can experience the trust anchor for certification path not found. Android 11 exception, confirming it affects many Android versions. So, let us recreate the code exception before teaching the most sophisticated debugging methods.

– Broken Local Hosts on Android Applications

You can quickly recreate the invalid exception using broken local hosts on Android applications, which confuses the paths. So, the process consists of a few steps that lead to the mistake. First, you must create a new application and try to complete a request to the API on a local host. Then, you must use the specific code that launches the certification path where the error appears.

The following example provides the required script:

Unfortunately, this input produces a log output that specifies the mistake and confirms the broken instances. You can learn more about this exception in the following syntax:56-*

Although we can provide the other outputs, this example is sufficient to comprehend the failed properties.

Fix the Trust Anchor for Certification Path Not Found Broken Script

You must add the certificates to a trust manager to fix this annoying exception and allow other processes. In addition, you can check the certificate path on the web page to check for issues and inconsistencies. Still, both approaches require changing the ways, which is critical when debugging the code.

Furthermore, customizing the HTTP client and using the retrofit property can achieve excellent results. Luckily, this method only requires a few changes, as shown below:

This is everything your script needs to clear the inconsistencies and allow all processes. Therefore, read the following example to learn about the full syntax:

As you can tell, this introductory solution enables all processes and repairs the certification paths. Luckily, this is one of the many debugging approaches and methods.

– Checking the Certificate With Open SSL

Another excellent debugging approach teaches you how to check the certificate with the open SSL property. This method ensures all paths are functional and the credentials are correct.

You can use the following command to check the certificate:

However, the debugging approach is complete with the certificate chain that contains a single element. Lastly, it would help if you referenced the signing authorities in a chain trusted by Android, as shown below:

This code snippet completes the second debugging approach that obliterates the error and allows your processes.

– Testing the Domain on Kotlin

You can remove the error by testing the domain on SSL labs, which ensures all paths and locations are fully functional. You can learn more about this principle in the following script:

This script is the last debugging approach covered in this guide. Lastly, you must update the build Gradle to complete the process.

Conclusion

The trust anchor for certification path Android error appears due to invalid or broken user certificates in the server configuration. Fortunately, this article explained the following critical points that help you remove the bug:

• Your program can sometimes fail to recognize the certification paths from untrusted sources
• We suggest recreating the error to help you troubleshoot the broken processes
• You can quickly apply the debugging approaches to your certificates
• Ensure all paths are functional before launching the processes
• You can test the domains on Kotlin to debug the mistake

Experiencing certification path error is typical when your document has insecure anchors and certificates. Luckily, this guide taught several debugging approaches that clear your inconsistencies and bugs.

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