Java AES加密ZeroPadding(CBC模式)

Java中没有ZeroPadding，可以使用改造NoPadding来实现ZeroPadding

引入依赖：

<!-- https://mvnrepository.com/artifact/org.bouncycastle/bcprov-jdk16 -->
<dependency>
    <groupId>org.bouncycastle</groupId>
    <artifactId>bcprov-jdk16</artifactId>
    <version>1.46</version>
</dependency>

Java代码：

import org.bouncycastle.jce.provider.BouncyCastleProvider;

import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import java.security.Security;
import java.util.Base64;

/**
 * 支持AES、DES、RSA加密、数字签名以及生成对称密钥和非对称密钥对
 */
public class CryptoUtils {

  private static final String key = "HcABCDEFGHIJKLMN";
  private static final String initVector = "HcABCDEFGHIJKLMN";


  public static String encrypt(String value) {
    try {
      IvParameterSpec iv = new IvParameterSpec(initVector.getBytes("UTF-8"));
      SecretKeySpec skeySpec = new SecretKeySpec(key.getBytes("UTF-8"), "AES");
      Security.addProvider(new BouncyCastleProvider());
      Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");

      int blockSize = cipher.getBlockSize();
      byte[] byteContent = value.getBytes();
      int plaintextLength = byteContent.length;
      if (plaintextLength % blockSize != 0) {
        plaintextLength = plaintextLength + (blockSize - (plaintextLength % blockSize));
      }
      byte[] plaintext = new byte[plaintextLength];
      System.arraycopy(byteContent, 0, plaintext, 0, byteContent.length);

      cipher.init(Cipher.ENCRYPT_MODE, skeySpec, iv);

      byte[] encrypted = cipher.doFinal(plaintext);
      return Base64.getEncoder().encodeToString(encrypted);
    } catch (Exception ex) {
      ex.printStackTrace();
    }
    return "";
  }

  public static void main(String[] args) {
    encrypt("Ab123456");
  }