ECDSA KeyPairGenerator 不可用(但在 JUnit 中有效) [英] ECDSA KeyPairGenerator not available (but in JUnit works)

问题描述

我在运行 Android 应用程序时观察到的异常低于我 - 当我将下面的代码作为 JUnit 运行时不会发生.

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)

代码:

  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)

如何解决这个问题?

更新

当我在测试中创建 JUnit 时(我使用的是 Android Studio):

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)
}

一切正常.如何在应用运行时解决此问题?

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

推荐答案

问题是无法在 Android 上使用 BounceyCastle - 而是使用 SpongyCastle:

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'

然后使用 BouncyCastleProvider 实例初始化提供程序，如下所示:

And then initialize the provider with BouncyCastleProvider instance like below:

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

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