list certificate stored in user credentials

Question

In Android 7 Nougat, user installed certificate goes to \"User credentials\" instead of \"Trusted credentials\"(which consists of system credential & user credential).

Answer 1

In addition to changing how to configure the Ca (@Pravin D answer),Android has changed the way a pkcs12 certificate is loaded from 6 to 7. I highlight the important elements:

When importing a pkcs12, is the root CA imported as trusted?

• Android 6: Yes
• Android 7: No

Where can I see the trusted credentials?

• Android 6: Settings ---> Security-->Trusted credentials (system & user)
• Android 7: Settings ---> Security-->Trusted credentials (system & user tab)

How to install user credentials?

• Android 6: pkcs#12 file, certificate file, programmatically
• Android 7: pkcs#12 file( without private keys), certificate file, programmatically, custom CA configuration(@ Pravin D answer)

Where can I see the user credentials (private keys)?

• Android 6: not available from settings
• Android 7: Settings-->Security-->User credentials

Is it possible to list user credentials programmatically?

• Android 6: No
• Android 7: No

Reviewing Android code in depth, internal Android Keystore is wilfully hidden, only available to use from Android core classes. It is not possible to implement a workaround to list user credentials