Android，PHP和node.js之间的encryption和解密

我试图在Android上对Java中的string进行encryption，然后使用PHP和/或node.js将其解密

我已经尝试http://www.androidsnippets.com/encrypt-decrypt-between-android-and-php ，但只有前半部分返回的hexstring的作品。

我想要一个128位的密钥（如果可能，更高的AES）的encryptiontypes。

encryption密钥也需要configuration，所以我的问题可能与我如何填充string有关。

Java的

String.format("%1$-" + n + "s", s) 

PHP

 $key = str_pad($key,16); 

完整的Java代码：

  package com.giggsey.test; import java.security.NoSuchAlgorithmException; import javax.crypto.Cipher; import javax.crypto.NoSuchPaddingException; import javax.crypto.spec.IvParameterSpec; import javax.crypto.spec.SecretKeySpec; import android.util.Log; public class SimpleCrypto { private String iv = "fedcba9876543210";//Dummy iv (CHANGE IT!) private IvParameterSpec ivspec; private SecretKeySpec keyspec; private Cipher cipher; private String SecretKey = "0123456789abcdef";//Dummy secretKey (CHANGE IT!) public void doKey(String key) { ivspec = new IvParameterSpec(iv.getBytes()); key = padRight(key,16); Log.d("hi",key); keyspec = new SecretKeySpec(key.getBytes(), "AES"); try { cipher = Cipher.getInstance("AES/CBC/NoPadding"); } catch (NoSuchAlgorithmException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (NoSuchPaddingException e) { // TODO Auto-generated catch block e.printStackTrace(); } } public byte[] encrypt(String text,String key) throws Exception { if(text == null || text.length() == 0) throw new Exception("Empty string"); doKey(key); byte[] encrypted = null; try { cipher.init(Cipher.ENCRYPT_MODE, keyspec, ivspec); encrypted = cipher.doFinal(padString(text).getBytes()); } catch (Exception e) { throw new Exception("[encrypt] " + e.getMessage()); } return encrypted; } public byte[] decrypt(String code,String key) throws Exception { if(code == null || code.length() == 0) throw new Exception("Empty string"); byte[] decrypted = null; doKey(key); try { cipher.init(Cipher.DECRYPT_MODE, keyspec, ivspec); decrypted = cipher.doFinal(hexToBytes(code)); } catch (Exception e) { throw new Exception("[decrypt] " + e.getMessage()); } return decrypted; } public static String bytesToHex(byte[] data) { if (data==null) { return null; } int len = data.length; String str = ""; for (int i=0; i<len; i++) { if ((data[i]&0xFF)<16) str = str + "0" + java.lang.Integer.toHexString(data[i]&0xFF); else str = str + java.lang.Integer.toHexString(data[i]&0xFF); } return str; } public static byte[] hexToBytes(String str) { if (str==null) { return null; } else if (str.length() < 2) { return null; } else { int len = str.length() / 2; byte[] buffer = new byte[len]; for (int i=0; i<len; i++) { buffer[i] = (byte) Integer.parseInt(str.substring(i*2,i*2+2),16); } return buffer; } } private static String padString(String source) { char paddingChar = ' '; int size = 16; int x = source.length() % size; int padLength = size - x; for (int i = 0; i < padLength; i++) { source += paddingChar; } return source; } public static String padRight(String s, int n) { return String.format("%1$-" + n + "s", s); } } 

PHP

 <?php class MCrypt { private $iv = 'fedcba9876543210'; #Same as in JAVA private $key = '0123456789abcdef'; #Same as in JAVA function encrypt($str,$key) { $key = str_pad($key,16); //$key = $this->hex2bin($key); $iv = $this->iv; $td = mcrypt_module_open('rijndael-128', '', 'cbc', $iv); mcrypt_generic_init($td, $key, $iv); $encrypted = mcrypt_generic($td, $str); mcrypt_generic_deinit($td); mcrypt_module_close($td); return bin2hex($encrypted); } function decrypt($code,$key) { //$key = $this->hex2bin($key); $code = $this->hex2bin($code); $iv = $this->iv; $td = mcrypt_module_open('rijndael-128', '', 'cbc', $iv); mcrypt_generic_init($td, $key, $iv); $decrypted = mdecrypt_generic($td, $code); mcrypt_generic_deinit($td); mcrypt_module_close($td); return utf8_encode(trim($decrypted)); } protected function hex2bin($hexdata) { $bindata = ''; for ($i = 0; $i < strlen($hexdata); $i += 2) { $bindata .= chr(hexdec(substr($hexdata, $i, 2))); } return $bindata; } } $e = new MCrypt(); $p = $e->encrypt("This is a sample text message","password"); echo "Encrypted: {$p}" . PHP_EOL; echo "Decrypted: "; echo $e->decrypt($p,"password") . PHP_EOL; echo "Java Decryption: "; echo $e->decrypt("9cf46d007aeff7c0c3cf880c76762037278269ac508aecd55010ce68e9fd980f","password"); echo PHP_EOL; 

Java调用脚本：

  String key = "password"; String message = "This is a sample text message"; String encrypted; try { SimpleCrypto s = new SimpleCrypto(); encrypted = SimpleCrypto.bytesToHex(s.encrypt(message, key)); Log.d("giggsey-test",encrypted); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } 

encryptionstring的输出：

Java：9cf46d007aeff7c0c3cf880c76762037278269ac508aecd55010ce68e9fd980f

PHP：9cf46d007aeff7c0c3cf880c76762037a1778e93dd596e4ce745e1f3b0ba9062

完整的PHP输出：

encryption：9cf46d007aeff7c0c3cf880c76762037a1778e93dd596e4ce745e1f3b0ba9062

解密：'ÃAA==）nÿ|ä¨

xÃÃ|Ã，ÃÃÂasV8gE

Java解密：'ÃAA==）nÿ|ä¨

XA1）òÃîÃÃA½Ã

射线

Answer 1

填充是PHP的问题。

 <?php function hex2bin($hexdata) { $bindata = ''; for ($i = 0; $i < strlen($hexdata); $i += 2) { $bindata .= chr(hexdec(substr($hexdata, $i, 2))); } return $bindata; } $key = "password"; $data = "This is a sample text message"; $key = str_pad($key,16); $blockSize = mcrypt_get_block_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_CBC); $padding = $blockSize - (strlen($data) % $blockSize); $data .= str_repeat(chr($padding), $padding); $c = mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $key, $data, MCRYPT_MODE_CBC, 'fedcba9876543210'); $c = bin2hex($c); echo $c; echo PHP_EOL; $c = hex2bin($c); $td = mcrypt_module_open(MCRYPT_RIJNDAEL_128,'',MCRYPT_MODE_CBC, ''); mcrypt_generic_init($td, $key, 'fedcba9876543210'); $decrypted = mdecrypt_generic($td, $c); mcrypt_generic_deinit($td); mcrypt_module_close($td); echo $decrypted; 

它现在返回相同的Javaencryption时，我可以解密消息罚款。

Answer 2

嗨请检查这个链接。

这里检查最后一个评论说：“ 这不适用于UNICODE字符 ”

这是UTF-8 characters

这是我在encryption之前用我的string做的事情：

 myUtf8String = new String(myString.getBytes("UTF-8")); 

Answer 3

// PHP

 echo base64_encode('something...') 

// java

 import java.io.IOException; import java.util.logging.Level; import java.util.logging.Logger; import javax.crypto.Cipher; import sun.misc.BASE64Decoder; public class Decrypt_test { public static void main(String[] args) { BASE64Decoder decode = new BASE64Decoder(); try { // sample of string to decode: NTI2cWV5d3RkJV4mKg== String result = new String(decode.decodeBuffer("string-to-decode")); System.out.println(result); } catch (IOException ex) { Logger.getLogger(Decrypt_test.class.getName()).log(Level.SEVERE, null, ex); } } } 

这很容易，但不好