org.bouncycastle.crypto.generators.SM2KeyPairGenerator 需要引入哪个依赖包？

要使用`org.bouncycastle.crypto.generators.SM2KeyPairGenerator`类，您需要在您的项目中引入Bouncy Castle库的依赖。您可以在项目的pom.xml文件中添加以下依赖：

<dependency>
    <groupId>org.bouncycastle</groupId>
    <artifactId>bcpkix-jdk15on</artifactId>
    <version>1.68</version>
</dependency>

或者您也可以手动下载Bouncy Castle库的jar包，然后将其添加到您的项目中。请注意，Bouncy Castle库的版本可能会有所不同，您需要根据需要进行调整。

相关问题

java如何实现SM2加密解密

Java可以使用Bouncy Castle库来实现SM2加密解密。下面是一个示例代码：

import org.bouncycastle.crypto.AsymmetricCipherKeyPair;
import org.bouncycastle.crypto.CipherParameters;
import org.bouncycastle.crypto.engines.SM2Engine;
import org.bouncycastle.crypto.generators.ECKeyPairGenerator;
import org.bouncycastle.crypto.params.ECKeyGenerationParameters;
import org.bouncycastle.crypto.params.ECPrivateKeyParameters;
import org.bouncycastle.crypto.params.ECPublicKeyParameters;
import org.bouncycastle.crypto.params.ParametersWithRandom;
import org.bouncycastle.crypto.util.PrivateKeyFactory;
import org.bouncycastle.crypto.util.PublicKeyFactory;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.bouncycastle.util.encoders.Hex;

import java.security.Security;
import java.security.SecureRandom;

public class SM2Example {
    public static void main(String[] args) throws Exception {
        Security.addProvider(new BouncyCastleProvider());

        // 生成密钥对
        ECKeyPairGenerator keyPairGenerator = new ECKeyPairGenerator();
        ECKeyGenerationParameters keyGenerationParameters = new ECKeyGenerationParameters(SM2Util.DOMAIN_PARAMS, new SecureRandom());
        keyPairGenerator.init(keyGenerationParameters);
        AsymmetricCipherKeyPair keyPair = keyPairGenerator.generateKeyPair();

        // 获取公钥和私钥
        ECPublicKeyParameters publicKey = (ECPublicKeyParameters) keyPair.getPublic();
        ECPrivateKeyParameters privateKey = (ECPrivateKeyParameters) keyPair.getPrivate();

        // 加密
        String plaintext = "Hello, SM2!";
        byte[] plaintextBytes = plaintext.getBytes("UTF-8");
        CipherParameters encryptParams = new ParametersWithRandom(publicKey, new SecureRandom());
        SM2Engine encryptEngine = new SM2Engine();
        encryptEngine.init(true, encryptParams);
        byte[] ciphertextBytes = encryptEngine.processBlock(plaintextBytes, 0, plaintextBytes.length);

        // 解密
        CipherParameters decryptParams = new ParametersWithRandom(privateKey, new SecureRandom());
        SM2Engine decryptEngine = new SM2Engine();
        decryptEngine.init(false, decryptParams);
        byte[] decryptedBytes = decryptEngine.processBlock(ciphertextBytes, 0, ciphertextBytes.length);
        String decryptedText = new String(decryptedBytes, "UTF-8");

        System.out.println("Plaintext: " + plaintext);
        System.out.println("Ciphertext: " + Hex.toHexString(ciphertextBytes));
        System.out.println("Decrypted text: " + decryptedText);
    }
}

这段代码使用Bouncy Castle库生成SM2密钥对，然后使用公钥加密明文，私钥解密密文。注意，需要先导入Bouncy Castle库，并且确保密钥对的生成参数`SM2Util.DOMAIN_PARAMS`正确设置。

国密算法SM2签名、SM2验证签名示例

好的，我可以为你提供国密算法SM2的签名和验证签名示例。以下是示例代码：

签名示例（使用Java语言）：

import org.bouncycastle.crypto.AsymmetricCipherKeyPair;
import org.bouncycastle.crypto.CryptoException;
import org.bouncycastle.crypto.digests.SM3Digest;
import org.bouncycastle.crypto.engines.SM2Engine;
import org.bouncycastle.crypto.generators.ECKeyPairGenerator;
import org.bouncycastle.crypto.params.*;
import org.bouncycastle.crypto.signers.SM2Signer;
import org.bouncycastle.jce.provider.BouncyCastleProvider;

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

public class SM2SignatureExample {
    public static void main(String[] args) {
        Security.addProvider(new BouncyCastleProvider());

        try {
            // 生成密钥对
            KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("EC", "BC");
            ECGenParameterSpec ecGenParameterSpec = new ECGenParameterSpec("sm2p256v1");
            keyPairGenerator.initialize(ecGenParameterSpec, new SecureRandom());
            KeyPair keyPair = keyPairGenerator.generateKeyPair();

            // 获取私钥和公钥
            PrivateKey privateKey = keyPair.getPrivate();
            PublicKey publicKey = keyPair.getPublic();

            // 待签名的数据
            byte[] data = "Hello, SM2!".getBytes();

            // 执行签名操作
            SM2Signer signer = new SM2Signer();            signer.init(true, new ParametersWithRandom(privateKey, new SecureRandom()));
            signer.update(data, 0, data.length);
            byte[] signature = signer.generateSignature();

            System.out.println("签名值: " + new BigInteger(1,