Compute hash for arbitrary input.

ComputeHash.kt

import android.util.Base64
import java.security.MessageDigest

fun computeHash(input: String, algorithm: String = "SHA-256"): String {
    // https://developer.android.com/reference/java/security/MessageDigest
    val messageDigest = MessageDigest.getInstance(algorithm).apply {
        update(input.toByteArray())
    }
    
    return Base64.encodeToString(messageDigest.digest(), Base64.DEFAULT)
}