Load certificate from resources file

load certificate from resources file

    @Throws(
        CertificateException::class,
        KeyStoreException::class,
        NoSuchAlgorithmException::class,
        KeyManagementException::class
    )
    private fun getSSLConfig(context: Context): SSLContext {
        val certificateFactory = CertificateFactory.getInstance("X.509")

        context.resources.openRawResource(R.raw.tpv_certificate).use { inputStream ->
            val ca: Certificate = certificateFactory.generateCertificate(inputStream)

            // Creating a Keystore containing our trusted CAs
            val keystoreType = KeyStore.getDefaultType()
            val keyStore = KeyStore.getInstance(keystoreType)
            keyStore.load(null, null)
            keyStore.setCertificateEntry("ca", ca)

            // Creating a TrustManager that trusts the CAs in our Keystore.
            val tmfAlgorithm = TrustManagerFactory.getDefaultAlgorithm()
            val tmf = TrustManagerFactory.getInstance(tmfAlgorithm)
            tmf.init(keyStore)

            // Creating an SSLSocketFactory that uses our TrustManager
            val sslContext = SSLContext.getInstance("TLS")
            sslContext.init(null, tmf.trustManagers, null)

            return sslContext
        }
    }