Convert private key in PEM format

Question

I have created a self-signed certificate with Java code and added into KeyStore. Now I want to export Private key and Certificate created, into a file in PEM format. Is it

Answer 1

On Android, you can use the following Kotlin extension function:

import android.util.Base64
import java.security.PublicKey

fun PublicKey.toPemString(): String {
    val publicKeyBase64: String = Base64.encodeToString(this.encoded, Base64.NO_WRAP)
    return publicKeyBase64.chunked(64).joinToString(
        separator = "\n",
        prefix = "-----BEGIN PUBLIC KEY-----\n",
        postfix = "\n-----END PUBLIC KEY-----\n"
    )
}