ECDSA KeyPairGenerator not available (but in JUnit works)

Issue

I am getting below Exception which I observed when running Android app - it does not occurs when I run the code below as JUnit.

java.security.NoSuchAlgorithmException: ECDSA KeyPairGenerator not available
    at java.security.KeyPairGenerator.getInstance(KeyPairGenerator.java:225)
    at com.mhamdaoui.smartcardreader.CryptoUtils$Companion.getMerchantEphemeralPublicKey(CryptoUtils.kt:48)
    at com.mhamdaoui.smartcardreader.MainActivity.onTagDiscovered(MainActivity.kt:80)
    at android.nfc.NfcActivityManager.onTagDiscovered(NfcActivityManager.java:603)
    at android.nfc.IAppCallback$Stub.onTransact(IAppCallback.java:83)
    at android.os.Binder.execTransact(Binder.java:573)

The code:

  Security.addProvider(BouncyCastleProvider())
  val generator = KeyPairGenerator.getInstance("ECDSA")
  val ecSpec = ECNamedCurveTable.getParameterSpec("secp256r1")
  generator.initialize(ecSpec)
  val keyPair = generator.generateKeyPair()
  val publicKey = keyPair.public as ECPublicKey
  return publicKey.q.getEncoded(true)

How to resolve this issue?

UPDATE

When I am creating JUnit in test (I am using Android Studio):

@Test
fun compressedGeneratorTest() {
  Security.addProvider(BouncyCastleProvider())
  val generator = KeyPairGenerator.getInstance("ECDSA")
  val ecSpec = ECNamedCurveTable.getParameterSpec("secp256r1")
  generator.initialize(ecSpec)
  val keyPair = generator.generateKeyPair()
  val publicKey = keyPair.public as ECPublicKey
  val encoded = publicKey.q.getEncoded(true)
  assert(true)
}

Everything works also. How to resolve this issue on App runtime?

Solution

The problem is that it is not possible to use BounceyCastle on Android - instead use SpongyCastle:

implementation 'com.madgag.spongycastle:prov:1.54.0.0'
implementation 'com.madgag.spongycastle:pkix:1.54.0.0'

And then initialize the provider with BouncyCastleProvider instance like below:

Security.addProvider(new org.spongycastle.jce.provider.BouncyCastleProvider())

Answered By - K.Os