PHP和Java之间的加密

Question

我当时希望加密PHP服务器和Java客户端之间的数据.单独的代码工作正常,我想在PHP服务器上坚持使用OpenSSL.

当你在尝试解码PHP加密字符串时遇到错误时,你们中的任何人都会看到我在这里丢失的任何内容:

[删除非工作代码]

更新 - 我能够使用openssl.这是使用PHP和Java文件的GIT repo.

https://github.com/chaudhuri-ab/CrossPlatformCiphers

Answer 1

可以找到工作版本 - https://github.com/chaudhuri-ab/CrossPlatformCiphers

要记住的一些事项是,如果您未在PHP中指定OPENSSL_RAW_DATA,则数据将被加密为base64.那让我失望了.

PHP:

class PHP_AES_Cipher {

    private static $OPENSSL_CIPHER_NAME = "aes-128-cbc"; //Name of OpenSSL Cipher 
    private static $CIPHER_KEY_LEN = 16; //128 bits

    /**
     * Encrypt data using AES Cipher (CBC) with 128 bit key
     * 
     * @param type $key - key to use should be 16 bytes long (128 bits)
     * @param type $iv - initialization vector
     * @param type $data - data to encrypt
     * @return encrypted data in base64 encoding with iv attached at end after a :
     */

    static function encrypt($key, $iv, $data) {
        if (strlen($key) < PHP_AES_Cipher::$CIPHER_KEY_LEN) {
            $key = str_pad("$key", PHP_AES_Cipher::$CIPHER_KEY_LEN, "0"); //0 pad to len 16
        } else if (strlen($key) > PHP_AES_Cipher::$CIPHER_KEY_LEN) {
            $key = substr($str, 0, PHP_AES_Cipher::$CIPHER_KEY_LEN); //truncate to 16 bytes
        }

        $encodedEncryptedData = base64_encode(openssl_encrypt($data, PHP_AES_Cipher::$OPENSSL_CIPHER_NAME, $key, OPENSSL_RAW_DATA, $iv));
        $encodedIV = base64_encode($iv);
        $encryptedPayload = $encodedEncryptedData.":".$encodedIV;

        return $encryptedPayload;

    }

    /**
     * Decrypt data using AES Cipher (CBC) with 128 bit key
     * 
     * @param type $key - key to use should be 16 bytes long (128 bits)
     * @param type $data - data to be decrypted in base64 encoding with iv attached at the end after a :
     * @return decrypted data
     */
    static function decrypt($key, $data) {
        if (strlen($key) < PHP_AES_Cipher::$CIPHER_KEY_LEN) {
            $key = str_pad("$key", PHP_AES_Cipher::$CIPHER_KEY_LEN, "0"); //0 pad to len 16
        } else if (strlen($key) > PHP_AES_Cipher::$CIPHER_KEY_LEN) {
            $key = substr($str, 0, PHP_AES_Cipher::$CIPHER_KEY_LEN); //truncate to 16 bytes
        }

        $parts = explode(':', $data); //Separate Encrypted data from iv.
        $decryptedData = openssl_decrypt(base64_decode($parts[0]), PHP_AES_Cipher::$OPENSSL_CIPHER_NAME, $key, OPENSSL_RAW_DATA, base64_decode($parts[1]));

        return $decryptedData;
    }

}

Java的:

package ciphers;

import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;

import java.util.Base64;

public class Java_AES_Cipher {

    private static String CIPHER_NAME = "AES/CBC/PKCS5PADDING";
    private static int CIPHER_KEY_LEN = 16; //128 bits

    /**
     * Encrypt data using AES Cipher (CBC) with 128 bit key
     * 
     * 
     * @param key  - key to use should be 16 bytes long (128 bits)
     * @param iv - initialization vector
     * @param data - data to encrypt
     * @return encryptedData data in base64 encoding with iv attached at end after a :
     */
    public static String encrypt(String key, String iv, String data) {
        try {
            if (key.length() < Java_AES_Cipher.CIPHER_KEY_LEN) {
                int numPad = Java_AES_Cipher.CIPHER_KEY_LEN - key.length();

                for(int i = 0; i < numPad; i++){
                    key += "0"; //0 pad to len 16 bytes
                }

            } else if (key.length() > Java_AES_Cipher.CIPHER_KEY_LEN) {
                key = key.substring(0, CIPHER_KEY_LEN); //truncate to 16 bytes
            }


            IvParameterSpec initVector = new IvParameterSpec(iv.getBytes("UTF-8"));
            SecretKeySpec skeySpec = new SecretKeySpec(key.getBytes("UTF-8"), "AES");

            Cipher cipher = Cipher.getInstance(Java_AES_Cipher.CIPHER_NAME);
            cipher.init(Cipher.ENCRYPT_MODE, skeySpec, initVector);

            byte[] encryptedData = cipher.doFinal((data.getBytes()));

            String base64_EncryptedData = Base64.getEncoder().encodeToString(encryptedData);
            String base64_IV = Base64.getEncoder().encodeToString(iv.getBytes("UTF-8"));

            return base64_EncryptedData + ":" + base64_IV;

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

        return null;
    }

    /**
     * Decrypt data using AES Cipher (CBC) with 128 bit key
     * 
     * @param key - key to use should be 16 bytes long (128 bits)
     * @param data - encrypted data with iv at the end separate by :
     * @return decrypted data string
     */

    public static String decrypt(String key, String data) {
        try {

            String[] parts = data.split(":");

            IvParameterSpec iv = new IvParameterSpec(Base64.getDecoder().decode(parts[1]));
            SecretKeySpec skeySpec = new SecretKeySpec(key.getBytes("UTF-8"), "AES");

            Cipher cipher = Cipher.getInstance(Java_AES_Cipher.CIPHER_NAME);
            cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv);

            byte[] decodedEncryptedData = Base64.getDecoder().decode(parts[0]);

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

            return new String(original);
        } catch (Exception ex) {
            ex.printStackTrace();
        }

        return null;
    }

}

Answer 2

我不明白为什么你的方法会失败。顺便说一下，我是这样做的，

爪哇

import com.sun.org.apache.xml.internal.security.utils.Base64;

import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;
import java.security.Key;

public class MyClass {

    public static void main(String[] args) {
        String data = "Arnab C";
        final String enc = DarKnight.getEncrypted(data);
        System.out.println("Encrypted : " + enc);
        System.out.println("Decrypted : " + DarKnight.getDecrypted(enc));
    }

    static class DarKnight {

        private static final String ALGORITHM = "AES";

        private static final byte[] SALT = "tHeApAcHe6410111".getBytes();// THE KEY MUST BE SAME
        private static final String X = DarKnight.class.getSimpleName();

        static String getEncrypted(String plainText) {

            if (plainText == null) {
                return null;
            }

            Key salt = getSalt();

            try {
                Cipher cipher = Cipher.getInstance(ALGORITHM);
                cipher.init(Cipher.ENCRYPT_MODE, salt);
                byte[] encodedValue = cipher.doFinal(plainText.getBytes());
                return Base64.encode(encodedValue);
            } catch (Exception e) {
                e.printStackTrace();
            }

            throw new IllegalArgumentException("Failed to encrypt data");
        }

        public static String getDecrypted(String encodedText) {

            if (encodedText == null) {
                return null;
            }

            Key salt = getSalt();
            try {
                Cipher cipher = Cipher.getInstance(ALGORITHM);
                cipher.init(Cipher.DECRYPT_MODE, salt);
                byte[] decodedValue = Base64.decode(encodedText);
                byte[] decValue = cipher.doFinal(decodedValue);
                return new String(decValue);
            } catch (Exception e) {
                e.printStackTrace();
            }
            return null;
        }

        static Key getSalt() {
            return new SecretKeySpec(SALT, ALGORITHM);
        }

    }
}

PHP

<?php

$key = "tHeApAcHe6410111";

function encrypt($text,$key){
     $block = mcrypt_get_block_size('rijndael_128', 'ecb');
     $pad = $block - (strlen($text) % $block);
     $text .= str_repeat(chr($pad), $pad);
     return base64_encode(mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $key, $text, MCRYPT_MODE_ECB));
}

function decrypt($str, $key){ 
     $str = base64_decode($str);
     $str = mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $key, $str, MCRYPT_MODE_ECB);
     $block = mcrypt_get_block_size('rijndael_128', 'ecb');
     $pad = ord($str[($len = strlen($str)) - 1]);
     $len = strlen($str);
     $pad = ord($str[$len-1]);
     return substr($str, 0, strlen($str) - $pad);
}

$enc =  encrypt("Arnab C",$GLOBALS['key']);
echo "Encrypted : ".$enc."</br>";
$dec = decrypt($enc,$GLOBALS['key']);
echo "Decrypted : ".$dec;

Java输出

加密：PJG1Uu6SjJuuVGf7ApuHAw==

解密：Arnab C

PHP 输出

加密：PJG1Uu6SjJuuVGf7ApuHAw==

解密：Arnab C