maven javax.crypto包依赖

你可以在 Maven 配置文件 pom.xml 中添加以下依赖来使用 javax.crypto 包：

<dependency>
    <groupId>javax.crypto</groupId>
    <artifactId>javax.crypto-api</artifactId>
    <version>1.1.1</version>
</dependency>

这将向你的项目添加 javax.crypto 包及其依赖项。请注意，这个依赖项只提供了 javax.crypto API 的接口，如果你需要实现它们的具体算法，你需要添加另一个依赖项。

例如，如果你需要使用 AES 算法，你可以添加以下依赖项：

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

这将向你的项目添加 Bouncy Castle 提供的 AES 实现。

相关问题

国密算法（SM2-SM3）Java 使用 demo maven 工程

很高兴回答你的问题！以下是一个使用国密算法（SM2-SM3）的Java Demo Maven工程，供您参考：

1. 首先，在pom.xml文件中添加以下依赖：

<dependency>
    <groupId>com.huawei.security</groupId>
    <artifactId>sm</artifactId>
    <version>2.0.5.300</version>
</dependency>

2. 创建SM2密钥对

import com.huawei.security.sm.SM2KeyPair;
import com.huawei.security.sm.SM2PrivateKey;
import com.huawei.security.sm.SM2PublicKey;
import java.security.NoSuchAlgorithmException;
import java.security.NoSuchProviderException;
import java.security.Security;

public class SM2Demo {
    public static void main(String[] args) throws NoSuchProviderException, NoSuchAlgorithmException {
        Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());

        SM2KeyPair sm2KeyPair = new SM2KeyPair();
        SM2PublicKey publicKey = sm2KeyPair.getPublicKey();
        SM2PrivateKey privateKey = sm2KeyPair.getPrivateKey();

        System.out.println("publicKey: " + publicKey.getHexString());
        System.out.println("privateKey: " + privateKey.getHexString());
    }
}

3. SM2加密和解密

import com.huawei.security.sm.SM2PrivateKey;
import com.huawei.security.sm.SM2PublicKey;
import com.huawei.security.sm.SM2Engine;
import java.security.NoSuchAlgorithmException;
import java.security.NoSuchProviderException;
import java.security.Security;
import java.security.InvalidAlgorithmParameterException;
import java.security.InvalidKeyException;
import java.security.KeyPairGenerator;
import javax.crypto.Cipher;
import javax.crypto.NoSuchPaddingException;

public class SM2Demo {
    public static void main(String[] args) throws NoSuchProviderException, NoSuchAlgorithmException, InvalidAlgorithmParameterException, InvalidKeyException, NoSuchPaddingException {
        Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());

        // 创建密钥对
        KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("EC", "BC");
        keyPairGenerator.initialize(256);
        SM2KeyPair sm2KeyPair = new SM2KeyPair(keyPairGenerator.generateKeyPair());

        // 获取公钥和私钥
        SM2PublicKey publicKey = sm2KeyPair.getPublicKey();
        SM2PrivateKey privateKey = sm2KeyPair.getPrivateKey();

        // 加密
        SM2Engine sm2Engine = new SM2Engine();
        Cipher cipher = Cipher.getInstance(sm2Engine.getAlgorithmName(), "BC");
        cipher.init(Cipher.ENCRYPT_MODE, publicKey);
        byte[] plaintext = "Hello, world!".getBytes();
        byte[] ciphertext = cipher.doFinal(plaintext);
        System.out.println("ciphertext: " + new String(ciphertext));

        // 解密
        cipher.init(Cipher.DECRYPT_MODE, privateKey);
        byte[] decrypted = cipher.doFinal(ciphertext);
        System.out.println("decrypted: " + new String(decrypted));
    }
}

4. SM3哈希算法

import com.huawei.security.sm.SM3Digest;
import java.security.NoSuchAlgorithmException;
import java.security.NoSuchProviderException;
import java.security.Security;

public class SM3Demo {
    public static void main(String[] args) throws NoSuchProviderException, NoSuchAlgorithmException {
        Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());

        // 计算哈希值
        SM3Digest sm3Digest = new SM3Digest();
        byte[] plaintext = "Hello, world!".getBytes();
        sm3Digest.update(plaintext, 0, plaintext.length);
        byte[] hash = new byte[sm3Digest.getDigestSize()];
        sm3Digest.doFinal(hash, 0);
        System.out.println("hash: " + org.bouncycastle.util.encoders.Hex.toHexString(hash));
    }
}

希望这个Demo工程能够帮助您使用国密算法（SM2-SM3）的Java开发。如果您有任何疑问，请随时联系我！

java+加密+解密+split_Java采用RSA加密及解密技术的有关Maven项目的配置流程:

首先，在你的 Maven 项目中添加以下依赖项：

<dependencies>
  <dependency>
    <groupId>commons-codec</groupId>
    <artifactId>commons-codec</artifactId>
    <version>1.14</version>
  </dependency>
  <dependency>
    <groupId>org.bouncycastle</groupId>
    <artifactId>bcprov-jdk15on</artifactId>
    <version>1.68</version>
  </dependency>
  <dependency>
    <groupId>org.bouncycastle</groupId>
    <artifactId>bcpkix-jdk15on</artifactId>
    <version>1.68</version>
  </dependency>
</dependencies>

其中，`commons-codec` 用于 Base64 编码，`bcprov-jdk15on` 和 `bcpkix-jdk15on` 用于 RSA 加密和解密。

接下来，生成 RSA 密钥对：

import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.NoSuchAlgorithmException;

public class RSAUtil {
  public static KeyPair generateKeyPair() throws NoSuchAlgorithmException {
    KeyPairGenerator generator = KeyPairGenerator.getInstance("RSA");
    generator.initialize(2048);
    return generator.generateKeyPair();
  }
}

然后，使用公钥加密和私钥解密：

import java.security.KeyPair;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.Security;
import javax.crypto.Cipher;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.bouncycastle.util.encoders.Base64;

public class RSAUtil {
  static {
    Security.addProvider(new BouncyCastleProvider());
  }

  public static String encrypt(String data, PublicKey publicKey) throws Exception {
    Cipher cipher = Cipher.getInstance("RSA/None/PKCS1Padding", "BC");
    cipher.init(Cipher.ENCRYPT_MODE, publicKey);
    byte[] encryptedBytes = cipher.doFinal(data.getBytes());
    return new String(Base64.encode(encryptedBytes), "UTF-8");
  }

  public static String decrypt(String encryptedData, PrivateKey privateKey) throws Exception {
    Cipher cipher = Cipher.getInstance("RSA/None/PKCS1Padding", "BC");
    cipher.init(Cipher.DECRYPT_MODE, privateKey);
    byte[] encryptedBytes = Base64.decode(encryptedData.getBytes("UTF-8"));
    byte[] decryptedBytes = cipher.doFinal(encryptedBytes);
    return new String(decryptedBytes);
  }
}

最后，使用 `split` 方法对加密后的字符串进行分段：

import org.apache.commons.lang3.StringUtils;

public class RSAUtil {
  public static String encrypt(String data, PublicKey publicKey) throws Exception {
    Cipher cipher = Cipher.getInstance("RSA/None/PKCS1Padding", "BC");
    cipher.init(Cipher.ENCRYPT_MODE, publicKey);
    byte[] encryptedBytes = cipher.doFinal(data.getBytes());
    String encryptedStr = new String(Base64.encode(encryptedBytes), "UTF-8");

    StringBuilder sb = new StringBuilder();
    for (int i = 0; i < encryptedStr.length(); i += 100) {
      sb.append(StringUtils.substring(encryptedStr, i, i + 100)).append("\n");
    }
    return sb.toString();
  }
}

这样，就可以使用 RSA 加密和解密，以及对加密后的字符串进行分段了。