[踩坑] AES在线加密输出结果和 PHP 加密结果不一致问题修复

上面的 加密方式 模式为ECB 填充Pkcs5Padding 编码Hex字符集 utf8(unicode编码)

Java 加密后能保证输出和 在线站点加密结果 一致, 但php 不求行.

给出两个demo

package org.example.jdk21demo.itpay;

import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;
import java.security.Key;
import org.apache.commons.codec.binary.Hex;

/**
 * @author Stephen
 * @since 2024/2/19 19:39
 */
public class AesUtils {

    private static final String ALGORITHM = "AES/ECB/PKCS5Padding";

    /**
     * Encrypts a string using AES encryption in ECB mode with PKCS5Padding.
     *
     * @param data The string to be encrypted.
     * @param key  The encryption key.
     * @return The encrypted string in hex format.
     * @throws Exception If an encryption error occurs.
     */
    public static String encrypt(String data, String key) throws Exception {

        Key secretKey = new SecretKeySpec(key.getBytes(), "AES");
        Cipher cipher = Cipher.getInstance(ALGORITHM);
        cipher.init(Cipher.ENCRYPT_MODE, secretKey);
        byte[] encryptedBytes = cipher.doFinal(data.getBytes());
        return Hex.encodeHexString(encryptedBytes);
    }

    /**
     * Decrypts a string using AES encryption in ECB mode with PKCS5Padding.
     *
     * @param encryptedData The encrypted string in hex format to be decrypted.
     * @param key           The decryption key.
     * @return The decrypted string.
     * @throws Exception If a decryption error occurs.
     */
    public static String decrypt(String encryptedData, String key) throws Exception {
        Key secretKey = new SecretKeySpec(key.getBytes(), "AES");
        Cipher cipher = Cipher.getInstance(ALGORITHM);
        cipher.init(Cipher.DECRYPT_MODE, secretKey);
        byte[] decryptedBytes = cipher.doFinal(Hex.decodeHex(encryptedData.toCharArray()));
        return new String(decryptedBytes);
    }

    public static void main(String[] args) {
        try {
            String key = "R/xxxxxxxxxxxxxx=="; // Replace this with your actual key
            String originalString = "hello1111111111";

            String encryptedString = AesUtils.encrypt(originalString, key);
            String decryptedString = AesUtils.decrypt(encryptedString, key);

            System.out.println("Original: " + originalString);
            System.out.println("Encrypted (Hex): " + encryptedString);
            System.out.println("Decrypted: " + decryptedString);


        } catch (Exception e) {
            e.printStackTrace();
        }
    }

}

上面 是java 的demo 输出没问题 6dce953815c585e4321112d1582b4b4a

<?php
class AesUtils
{
    const ALGORITHM = 'aes-192-ecb'; // AES-192 : 需要提供24位的密钥Key
//    const ALGORITHM = 'aes-256-ecb'; // AES-256 : 需要提供32位的密钥Key
//    const ALGORITHM = 'aes-128-ecb';// AES-128 : 需要提供16位的密钥Key
//    const ALGORITHM = 'AES/ECB/PKCS5Padding';

    /**
     * Encrypts a string using AES encryption in ECB mode with PKCS5Padding.
     * @param string $data The string to be encrypted.
     * @param string $key The encryption key.
     * @return string The encrypted string in hex format.
     * @throws Exception If an encryption error occurs.
     */
    public static function encrypt($data, $key)
    {
        $cipher = openssl_encrypt(
            $data,
            self::ALGORITHM,
            (string)$key,
            OPENSSL_RAW_DATA
        );
        return bin2hex($cipher);
    }

    /**
     * Decrypts a string using AES encryption in ECB mode with PKCS5Padding.
     * @param string $encryptedData The encrypted string in hex format to be decrypted.
     * @param string $key The decryption key.
     * @return string The decrypted string.
     * @throws Exception If a decryption error occurs.
     */
    public static function decrypt($encryptedData, $key)
    {
        $encryptedData = hex2bin($encryptedData);
        $decrypted = openssl_decrypt($encryptedData, self::ALGORITHM, (string)$key, OPENSSL_RAW_DATA);
        return $decrypted;
    }
}

// R/9U2DxTzoN7BGq1Yt1cvw==
$key = "R/xxxxxxxxxxx=="; // 隐藏key
$originalString = "hello1111111111";

try {
    $encryptedString = AesUtils::encrypt($originalString, $key);
    $decryptedString = AesUtils::decrypt($encryptedString, $key);

    echo "Original: " . $originalString . "\n";
    echo "Encrypted (Hex) 1: 6dce953815c585e4321112d1582b4b4a \n";
    echo "Encrypted (Hex) 2: " . $encryptedString . "\n";
    echo "Decrypted: " . $decryptedString . "\n";
} catch (Exception $e) {
    echo $e->getMessage();
}

php demo ,数据结果很难说, 重点问题在于 key 的字节长度需要修改 加密方式

const ALGORITHM = 'aes-128-ecb'; // AES-128 : 需要提供16位的密钥Key
const ALGORITHM = 'aes-192-ecb'; // AES-192 : 需要提供24位的密钥Key
const ALGORITHM = 'aes-256-ecb'; // AES-256 : 需要提供32位的密钥Key

注意呦 , 长度不一样