CBC之php java兼容版本

网上搜了N多代码，都是你抄我的，我抄你的，着实让人无语对苍天。经过多番资料的查找，php与java的cbc加密、解密结果终于一致了，代码如下：

Java加密解密类：

package main;

import javax.crypto.Cipher;

import javax.crypto.spec.IvParameterSpec;

import javax.crypto.spec.SecretKeySpec;

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

public class AESUtil {

    // 加密

    public static String Encrypt(String sSrc, String sKey) throws Exception {

        if (sKey == null) {

            System.out.print("Key为空null");

            return null;

        }

        // 判断Key是否为16位

        if (sKey.length() != 16) {

            System.out.print("Key长度不是16位");

            return null;

        }

        byte[] raw = sKey.getBytes();

        SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");

        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");//"算法/模式/补码方式"

        //Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");//"算法/模式/补码方式"

        IvParameterSpec iv = new IvParameterSpec("1234567890123456".getBytes());//使用CBC模式，需要一个向量iv，可增加加密算法的强度

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

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

        byte[] encrypted = cipher.doFinal(sSrc.getBytes("UTF-8"));

        return new String(Base64.encodeBase64(encrypted));

    }

    // 解密

    public static String Decrypt(String sSrc, String sKey) throws Exception {

        try {

            // 判断Key是否正确

            if (sKey == null) {

                System.out.print("Key为空null");

                return null;

            }

            // 判断Key是否为16位

            if (sKey.length() != 16) {

                System.out.print("Key长度不是16位");

                return null;

            }

            byte[] raw = sKey.getBytes("UTF-8");

            SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");

            Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");

            //Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");

            IvParameterSpec iv = new IvParameterSpec("1234567890123456"

                    .getBytes());

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

            //cipher.init(Cipher.DECRYPT_MODE, skeySpec);

            Base64.decodeBase64(sSrc.getBytes());

            byte[] encrypted1 = Base64.decodeBase64(sSrc.getBytes());

            try {

                byte[] original = cipher.doFinal(encrypted1);

                String originalString = new String(original);

                return originalString;

            } catch (Exception e) {

                System.out.println(e.toString());

                return null;

            }

        } catch (Exception ex) {

            System.out.println(ex.toString());

            return null;

        }

    }

}

Java调用：

public static void main(String[] args) {

        // TODO Auto-generated method stub

        String cKey = "1234567890123456";

        // 需要加密的字串

        String cSrc = "test string";

        System.out.println(cSrc);

        String enString;

        String deString;

        try {

            enString = AESUtil.Encrypt(cSrc, cKey);

            System.out.println("加密后的字串是：" + enString);

            deString=AESUtil.Decrypt(enString, cKey);

            System.out.println("解密后的字串是：" + deString);

        } catch (Exception e) {

            // TODO Auto-generated catch block

            e.printStackTrace();

        }

    }

要注意，AESUtil类中，有个iv变量，要和php中的iv对应起来。

PHP加密解密类：

class MyAES {

 public function encryptString($input, $key,$iv) {

   $size = mcrypt_get_block_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_CBC);

   $input = MyAES::pkcs5_pad($input, $size);

   $td = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_CBC, '');

   //$iv = mcrypt_create_iv (mcrypt_enc_get_iv_size($td), MCRYPT_RAND);

   mcrypt_generic_init($td, $key, $iv);

   $data = mcrypt_generic($td, $input);

   mcrypt_generic_deinit($td);

   mcrypt_module_close($td);

   $data = base64_encode($data);

   return $data;

  }

  private static function pkcs5_pad ($text, $blocksize) {

    $pad = $blocksize - (strlen($text) % $blocksize);

    return $text . str_repeat(chr($pad), $pad);

  }

 public function decryptString($sStr, $sKey,$iv) {

    $td = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_CBC, '');

    //$iv = mcrypt_create_iv (mcrypt_enc_get_iv_size($td), MCRYPT_RAND);

    $decrypted= @mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $sKey, base64_decode($sStr), MCRYPT_MODE_CBC, $iv);

    $dec_s = strlen($decrypted);

    $padding = ord($decrypted[$dec_s-1]);

    $decrypted = substr($decrypted, 0, -$padding);

    return $decrypted;

  }

 }

PHP调用：

$msg = 'test string';

$key='1234567890123456';

$iv=$key;

$x=new MyAES();

$en=$x->encryptString($msg, $key,$iv);

echo $en,'<br />';

echo $x->decryptString($en,$key,$iv);

参考资料：http://blog.163.com/fan_xy_qingyuan/blog/static/188987748201391124728740/

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CBC之php java兼容版本

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