对于JMeter，您可以从this answer中获取代码样本，并从合适的JSR223测试元素和Groovy language中使用它
演示：

如果你想重复这个练习，请编写代码：

import java.security.*;
import java.security.spec.ECGenParameterSpec;

KeyPairGenerator keyGen = KeyPairGenerator.getInstance("EC");

keyGen.initialize(new ECGenParameterSpec("secp256r1"), new SecureRandom());

KeyPair pair = keyGen.generateKeyPair();
PrivateKey priv = pair.getPrivate();
PublicKey pub = pair.getPublic();

/*
 * Create a Signature object and initialize it with the private key
 */

Signature ecdsa = Signature.getInstance("SHA256withECDSA");

ecdsa.initSign(priv);

String str = "aaa";
byte[] strByte = str.getBytes("UTF-8");
ecdsa.update(strByte);

/*
 * Now that all the data to be signed has been read in, generate a
 * signature for it
 */

byte[] realSig = ecdsa.sign();
log.info("Signature: " + new BigInteger(1, realSig).toString(16));