Example usage for org.bouncycastle.jce.provider JCEECPrivateKey getParameters

Introduction

In this page you can find the example usage for org.bouncycastle.jce.provider JCEECPrivateKey getParameters.

Prototype

public org.bouncycastle.jce.spec.ECParameterSpec getParameters() 

Source Link

Usage

From source file:org.jmrtd.app.DocumentEditFrame.java

License:Open Source License

private static PublicKey getECPublicKeyFromPrivateKey(PrivateKey privateKey) throws GeneralSecurityException {
    KeyFactory keyFactory = KeyFactory.getInstance("EC", BC_PROVIDER);
    org.bouncycastle.jce.provider.JCEECPrivateKey priv = (org.bouncycastle.jce.provider.JCEECPrivateKey) privateKey;
    org.bouncycastle.jce.spec.ECParameterSpec params = priv.getParameters();
    org.bouncycastle.jce.spec.ECPublicKeySpec pubKS = new org.bouncycastle.jce.spec.ECPublicKeySpec(
            params.getG().multiply(priv.getD()), params);
    PublicKey publicKey = keyFactory.generatePublic(pubKS);
    return publicKey;
}

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