在PHP中复制Java的AES / CBC / PKCS5Padding加密

Question

已经包含了下面的java和php代码和输出。目标是在php中获取java校验和值。可以看出我在php中有与java相同的输入，虽然我在php的openssl_encrypt函数中尝试了很多参数但却无法获得所需的输出。帮助解决这个将非常感谢！请注意，java代码是权威的，所需的任何更改都只能在php中进行。

Java代码：

import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Arrays;
import java.util.Base64;
import java.io.ByteArrayOutputStream; 

public class ChecksumGen {

    public static void main(final String[] args) {
        String data = "INPUTDATA";
        String secretKey = "0000000000000000000000000000000000000000000000000000000000000000";
        byte[] iv = new byte[16];
        try {
            byte[] hashedData = getDigest(data);
            byte[] key = hexStringToByteArray(secretKey);
            byte[] checksum = encrypt(key, hashedData, iv);
            showB64("key ", key);
            showB64("iv ", iv);
            showB64("hashedData ", hashedData);
            showB64("checksum ", checksum);
        } catch (Exception ex) {
            throw new RuntimeException(ex);
        }
    }

    public static byte[] getDigest(String checkSumInput) {
        try {
            MessageDigest localMessageDigest = MessageDigest.getInstance("SHA-256");
            byte[] checkSumInputBytes = checkSumInput.getBytes("UTF-8");
            localMessageDigest.update(checkSumInputBytes);
            byte[] digest = localMessageDigest.digest();
            return digest;
        } catch (NoSuchAlgorithmException | UnsupportedEncodingException ex) {
            throw new RuntimeException(ex);
        }
    }

    public static byte[] hexStringToByteArray(String s) {
        byte[] b = new byte[s.length() / 2];
        for (int i = 0; i < b.length; i++) {
            int index = i * 2;
            int v = Integer.parseInt(s.substring(index, index + 2), 16);
            b[i] = (byte) v;
        }
        return b;
    }

    public static byte[] encrypt(byte[] key,byte[] data, byte[] iv)throws Exception{
        SecretKeySpec secretKeySpec = new SecretKeySpec(key, "AES");
        IvParameterSpec ivSpec = new IvParameterSpec(iv);
        Cipher acipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
        acipher.init(Cipher.ENCRYPT_MODE, secretKeySpec,ivSpec);
        byte[] arrayOfByte1 = acipher.doFinal(data);
        return arrayOfByte1;
    }

    public static void showB64(String label, byte[] rawData) {
      System.out.println(label + ":" + Base64.getEncoder().encodeToString(rawData));
    }
}

PHP代码：

<?php
$data  = "INPUTDATA"; 
$hashedData = hash("sha256", $data, true);
$secretKey = "0000000000000000000000000000000000000000000000000000000000000000";
$ivStr = "00000000000000000000000000000000";
$key = pack('H*', $secretKey);
$iv = pack('H*', $ivStr);
$inputData = pkcs5_pad($hashedData, 16);
showB64('key', $key);
showB64('iv', $iv);
showB64('hashedData', $hashedData);
showB64('inputData', $inputData);
$checksum = encrypt($key, $inputData, $iv);
showB64('checksum', $checksum);

function encrypt($key,$data,$iv){
  $cipher = 'AES-128-CBC';
  $options = OPENSSL_RAW_DATA|OPENSSL_ZERO_PADDING;
  $raw = openssl_encrypt(
  $data,
  $cipher,
  $key,
  $options,
  $iv
  );
  return $raw;
}

function pkcs5_pad($text, $blocksize){ 
  $pad = $blocksize - (strlen($text) % $blocksize); 
  return $text . str_repeat(chr($pad), $pad); 
}     

function showB64($label, $rawData) {
  echo "{$label} :".base64_encode($rawData)."\n";
}

Java输出：

key :AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=
iv :AAAAAAAAAAAAAAAAAAAAAA==
hashedData :ZAgNCUfIbdT9EjdkCb3XDNpMFGV34rXNjcTOQ9cdZ3w=
checksum :9NS/ZKMscpa4V7i2YQQPoycxCwbL1BlK3h9O/1ujoD1iYgjE8tZx+JRGflw5WikH

PHP输出：

key :AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=
iv :AAAAAAAAAAAAAAAAAAAAAA==
hashedData :ZAgNCUfIbdT9EjdkCb3XDNpMFGV34rXNjcTOQ9cdZ3w=
inputData :ZAgNCUfIbdT9EjdkCb3XDNpMFGV34rXNjcTOQ9cdZ3wQEBAQEBAQEBAQEBAQEBAQ
checksum :LtdJzSl9UgEpZrpdg7X5g5CYqE3eXQvijazrvkw0XFNY2bxn8zGp1ea8DrUmw/uu

Answer 1

最后根据以下链接找出了解决方案：

https://gist.github.com/odan/c1dc2798ef9cedb9fedd09cdfe6e8e76#gistcomment-2743227

MCRYPT_RIJNDAEL_128与AES-128-CBC不同。

在MYCRYT_RIJNDAEL_128中，128实际上是指块大小而不是密钥大小，在AES-128-CBC中，128指的是密钥大小，即当与有效的256位密钥一起使用时它们都是AES-256。

在PHP代码中，将函数encrypt（）中的$ cipher从'AES-128-CBC'更改为'AES-256-CBC'有助于我们使用openssl_encrypt获取所需的输出。