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public void verify() throws Exception {
    Signature ecdsaVerify = Signature.getInstance("SHA256withECDSA"));
    EncodedKeySpec publicKeySpec = new X509EncodedKeySpec(Base64.getDecoder().decode("your public key goes here"));
    KeyFactory keyFactory = KeyFactory.getInstance("EC");
    PublicKey publicKey = keyFactory.generatePublic(publicKeySpec);
    ecdsaVerify.initVerify(publicKey);
    ecdsaVerify.update("All the webhook field values (only the values) concatenated together using a semicolon ;".getBytes("UTF-8"));
    boolean result = ecdsaVerify.verify(Base64.getDecoder().decode("Signature to verify")); //Must return true
}

var jwa = require("jwa");
const verifySignature = () => {
let public_key = Buffer.from("public key here", "base64");
let signature = Buffer.from("Signature_here", "base64");
let payload = "data here seperated by semicolon";
let ecdsa = jwa("ES256");
let verify = ecdsa.verify(payload, signature, public_key);
verifySignature();

import java.security.KeyFactory;
import java.security.Signature;
import java.security.spec.X509EncodedKeySpec;
import java.util.Base64;
public class SO70655734 {
  public static void main (String[] args) throws Exception {
    String data = "some;test;data";
    String pubkey = "MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEyOFORyCVCxX+W4QZevzH6skTbp2lVDtRLV0+7ypHjX26wFtSWSe4MTI0GZjIKDOAIT8KpbqH8HXI6Wo5S6/6hg==";
    String sig = "MEQCICDLwztlKOXmQLuDJ0Hh96gGAT2/wsm2ymw3CDxSDnB3AiAK7eR8+C6g/zw5TmXUX0K/pV5kjIJTCieIkQXzH30WYA==";
    Signature ecdsa = Signature.getInstance("SHA256withECDSA");
    ecdsa.initVerify(KeyFactory.getInstance("EC").generatePublic(
      new X509EncodedKeySpec(Base64.getDecoder().decode(pubkey)) ));
    ecdsa.update(data.getBytes("UTF-8")); // or StandardCharsets.UTF_8 
    System.out.println(ecdsa.verify(Base64.getDecoder().decode(sig)));
-> true
const crypto = require('crypto');
const data = "some;test;data";
const pubkey = "-----BEGIN PUBLIC KEY-----\n"
  + "MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEyOFORyCVCxX+W4QZevzH6skTbp2lVDtRLV0+7ypHjX26wFtSWSe4MTI0GZjIKDOAIT8KpbqH8HXI6Wo5S6/6hg==\n"
  + "-----END PUBLIC KEY-----\n";

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问 编解码SHA256WITHECDSA - nodeJS EN

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