java.lang.IllegalStateException: BouncyCastleProvider is not available

[wangjunbao2018]

Hi there,

I hava added cava to my project, add then I used the SECP256K1 class to sign my data, but some errors happened. Is there anyone met the problem and tells me why? thx

The error message is like this:

Exception in thread "main" java.lang.ExceptionInInitializerError
    at net.consensys.cava.crypto.SECP256K1$PublicKey.fromSecretKey(SECP256K1.java:527)
    at net.consensys.cava.crypto.SECP256K1$KeyPair.fromSecretKey(SECP256K1.java:684)
    at one.contentbox.boxd.samples.SignSample.main(SignSample.java:40)
Caused by: java.lang.IllegalStateException: BouncyCastleProvider is not available, see https://www.bouncycastle.org/wiki/display/JA1/Provider+Installation
    at net.consensys.cava.crypto.SECP256K1$Parameters.<clinit>(SECP256K1.java:111)
    ... 3 more
Caused by: java.security.NoSuchProviderException: no such provider: BC
    at sun.security.jca.GetInstance.getService(GetInstance.java:83)
    at sun.security.jca.GetInstance.getInstance(GetInstance.java:206)
    at java.security.KeyPairGenerator.getInstance(KeyPairGenerator.java:279)
    at net.consensys.cava.crypto.SECP256K1$Parameters.<clinit>(SECP256K1.java:109)
    ... 3 more

My code is like this:

String privKeyHex = "29fbf01166fc31c941cadc1659a5f684f81c22c1113e5aa5b0af28b7dd453269";
BigInteger privKeyBigInteger = new BigInteger(privKeyHex, 16);
String data = "46f7f67f515e7d053525459991c7a6b3e673950809af776324f46d91df9e600d";

 SECP256K1.Signature signature = SECP256K1
                .sign(Hex.decode(data), SECP256K1.KeyPair.
                        fromSecretKey(SECP256K1.SecretKey.fromInteger(privKeyBigInteger)));

byte[] data  = signature.bytes().toArray();

[wangjunbao2018]

For more infomation, I'm sure org.bouncycastle:bcprov-jdk15on is already added to classpath.

[atoulme]

Hello! Thank you for your interest!

It's not enough to add bouncy castle to the classpath. You also need to add it to the security providers of the JDK. See https://people.eecs.berkeley.edu/~jonah/bc/org/bouncycastle/jce/provider/BouncyCastleProvider.html