Java 版本

import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESedeKeySpec;

import org.apache.commons.codec.binary.Base64;

public class Des3Sign {
    private static String ALGORITHM="DESede";

    /**
     * 3DES加密
     * @param src 需要加密的明文
     * @return 加密后的密文
     */
    public static String  DES3EncryptMode(String src) throws Exception {
        Cipher cipher = Cipher.getInstance(ALGORITHM);
        DESedeKeySpec desKeySpec = new DESedeKeySpec(ParmaConsts.DES3_KEY.getBytes()); 
        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(ALGORITHM); 
        SecretKey secretKey = keyFactory.generateSecret(desKeySpec); 
        cipher.init(Cipher.ENCRYPT_MODE, secretKey);
        return new String(Base64.encodeBase64(cipher.doFinal(src.getBytes("UTF-8"))));
    }

    /**
     * 3DES解密
     * @param src 加密后的密文
     * @return 解密后的明文
     */
    public static String  DES3DecryptMode(String src) throws Exception {
        Cipher cipher = Cipher.getInstance(ALGORITHM);
        DESedeKeySpec desKeySpec = new DESedeKeySpec(ParmaConsts.DES3_KEY.getBytes()); 
        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(ALGORITHM); 
        SecretKey secretKey = keyFactory.generateSecret(desKeySpec); 
        cipher.init(Cipher.DECRYPT_MODE, secretKey);
        byte [] dd=cipher.doFinal(Base64.decodeBase64(src.getBytes("UTF-8")));
        return new String(dd,"UTF-8");
    }
}

Ruby 版本

require 'base64'
require 'digest'
require 'openssl'

module Des3Encrypt
  def self.cipher(mode, key, iv, data)
    cipher = OpenSSL::Cipher.new('DES-EDE3-CBC').send(mode)
    cipher.key = key
    cipher.iv  = iv if iv

    encrypted = ''
    encrypted << cipher.update(data)
    encrypted << cipher.final
    encrypted
  end

  def self.encrypt(key, iv, data)
    Base64.strict_encode64 cipher(:encrypt, key, iv, data)
  end

  def self.decrypt(key, iv, data)
    cipher(:decrypt, key, iv, Base64.strict_decode64(data))
  end
end

这两种 3DES 加密解密的方式是一样的吗？Java 端无法解密我的 Ruby 端加密的数据，使用的同样的 key，iv 为空