How to sign a string with .p12?

Question

I am implementing an SDK and I cant understand the following:

A copy of the ID that is digitally signed with your private key.

I have the .p12 file and the ID(String) that needs to be signed.

Can anyone help me how would i achieve this in Android/Java?

I've never worked with Encryption and Decryption, So I am little clueless.

Please let me know, If I'm missing something.

Thank you.

Answer 1

Here is a good example of signing a message, with private key. You'll need to know the signature Algorithms (see list of available algo's here