dinorahto

/**
 * Created by Dinorah Tovar on 04/04/18.
 * Secondary helper interceptor to skip interceptor headers over Data Module
 */

class SupportInterceptor: Interceptor, Authenticator {
  
    /**
     * Interceptor class for setting of the headers for every request
     */

dinorahto

/**
 * Custom EditText that paints a bottom line and the text or
 * a filled circle if it is a password
 */

class PinEntryEditText : AppCompatEditText {

    private var mSpace = 24f //24 dp by default, space between the lines
    private var mNumChars = 4f
    private var mLineSpacing = 8f //8dp by default, height of the text from our lines

dinorahto

sharedPreferences.edit(commit = true) { 
    putString("Some key", "Some value")
}

dinorahto

// Release Candidate Option
val sharedPreferences = EncryptedSharedPreferences.create(
    "FileName",
    masterKeyAlias,
    context,
    EncryptedSharedPreferences.PrefKeyEncryptionScheme.AES256_SIV,
    EncryptedSharedPreferences.PrefValueEncryptionScheme.AES256_GCM
)

// Alpha Option

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// Release Candidate option
val keyGenParameterSpec = MasterKeys.AES256_GCM_SPEC
val masterKeyAlias = MasterKeys.getOrCreate(keyGenParameterSpec)

// Alpha option
val masterKeyAvailable = MasterKey
            .Builder(application.applicationContext)
            .setKeyScheme(MasterKey.KeyScheme.AES256_GCM)
            .build()

dinorahto

val spec = KeyGenParameterSpec.Builder(
       KEY_NAME,
       KeyProperties.PURPOSE_ENCRYPT or
       KeyProperties.PURPOSE_DECRYPT
   ).apply {
       setBlockModes(KeyProperties.BLOCK_MODE_CBC)
       setEncryptionPaddings(KeyProperties.ENCRYPTION_PADDING_PKCS7)
       setUserAuthenticationRequired(true)
       setUserAuthenticationValidityDurationSeconds(TIMEOUT_SECONDS)
       setRandomizedEncryptionRequired(false)

dinorahto

KeyPairGenerator.getInstance(KeyProperties.KEY_ALGORITHM_RSA, "AndroidKeyStore").apply {
    val certBuilder = KeyGenParameterSpec.Builder(alias, KeyProperties.PURPOSE_ENCRYPT)
        .setKeyValidityStart(keyValidityStart)
        .setKeyValidityEnd(keyValidityEnd)
        .setCertificateSerialNumber(BigInteger.valueOf(1L))
        .setCertificateSubject(X500Principal("CN=MyCompany"))
        .setUserAuthenticationRequired(true)
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
        initialize(
            certBuilder

dinorahto

val biometricPromptBuilder = BiometricPrompt.PromptInfo.Builder()
            .setTitle("A nice title")
            .setSubtitle("A nicer subtitle")
            .setNegativeButtonText("Cancel")
            .build()

dinorahto

biometricPrompt.authenticate(promptInfo)

dinorahto

var biometricPrompt = BiometricPrompt(this, executor, object : BiometricPrompt.AuthenticationCallback() {
  override fun onAuthenticationError(errorCode: Int, errString: CharSequence) {
      super.onAuthenticationError(errorCode, errString)
      // Error 
  }

  override fun onAuthenticationSucceeded(result: BiometricPrompt.AuthenticationResult) {
      super.onAuthenticationSucceeded(result)
      // Success
  }