BouncyCastle error: can't recognise key type in ECDSA based signer

I have been doing some simple testing with BouncyCastle's crypto library and RSA's crypto library. What I am doing is generating a private/public key pair like so:

KeyPairGenerator kpg = KeyPairGenerator.getInstance("EC", "JsafeJCE");
kpg.initialize(new ECGenParameterSpec("secp384r1"));
KeyPair kp = kpg.genKeyPair();
PrivateKey priv = kp.getPrivate();
PublicKey pub = kp.getPublic();

Then I generate the signature like so

Signature sig = Signature.getInstance("SHA384/ECDSA","BC");

and I try to sign the private key:

sig.initSign(priv);

All of this gets me the error:

java.security.InvalidKeyException: can't recognise key type in ECDSA based sign开发者_如何学JAVAer

When I BC and JsafeJCE, I get no error and everything is fine. Works also if both providers are BC. So why is it I can't sign the JsafeJCE generated key with the BC lib?

Bouncycastle requires that the private key used for its signing implementation must be one of its own. I don't know why you'd choose different providers for the various pieces in any event.

I solved the same issue by following the below steps:

1) Create static provider:

private static BouncyCastleProvider bouncyCastleProvider;
public static final BouncyCastleProvider BOUNCY_CASTLE_PROVIDER = new BouncyCastleProvider();
static {
    bouncyCastleProvider = BOUNCY_CASTLE_PROVIDER;
}

2) Generate keyPair:

KeyPairGenerator g = KeyPairGenerator.getInstance("ECDSA", bouncyCastleProvider);
g.initialize(ecSpec, random);
KeyPair keyPair = g.generateKeyPair();

3) If you want to sign something using key:

Signature signature = Signature.getInstance("SHA256withECDSA", bouncyCastleProvider);
signature.initSign(privateKey);
signature.update(signedData);
signature.sign();

It worked for me, and will hopefully work for you as well.