Android 和 PHP 之间进行数据加密传输
[代码] [Java]代码
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mcrypt = new MCrypt();
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/* Encrypt */
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String encrypted = MCrypt.bytesToHex( mcrypt.encrypt("Text to Encrypt") );
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/* Decrypt */
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String decrypted = new String( mcrypt.decrypt( encrypted ) );
[代码] [PHP]代码
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$mcrypt = new MCrypt();
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#Encrypt
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$encrypted = $mcrypt->encrypt("Text to encrypt");
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#Decrypt
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$decrypted = $mcrypt->decrypt($encrypted);
[代码] MCrypt.java
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/***********/
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/**JAVA**/
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import java.security.NoSuchAlgorithmException;
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import javax.crypto.Cipher;
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import javax.crypto.NoSuchPaddingException;
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import javax.crypto.spec.IvParameterSpec;
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import javax.crypto.spec.SecretKeySpec;
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public class MCrypt {
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private String iv = "fedcba9876543210";//Dummy iv (CHANGE IT!)
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private IvParameterSpec ivspec;
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private SecretKeySpec keyspec;
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private Cipher cipher;
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private String SecretKey = "0123456789abcdef";//Dummy secretKey (CHANGE IT!)
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public MCrypt()
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{
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ivspec = new IvParameterSpec(iv.getBytes());
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keyspec = new SecretKeySpec(SecretKey.getBytes(), "AES");
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try {
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cipher = Cipher.getInstance("AES/CBC/NoPadding");
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} catch (NoSuchAlgorithmException e) {
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// TODO Auto-generated catch block
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e.printStackTrace();
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} catch (NoSuchPaddingException e) {
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// TODO Auto-generated catch block
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e.printStackTrace();
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}
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}
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public byte[] encrypt(String text) throws Exception
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{
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if(text == null || text.length() == 0)
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throw new Exception("Empty string");
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byte[] encrypted = null;
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try {
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cipher.init(Cipher.ENCRYPT_MODE, keyspec, ivspec);
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encrypted = cipher.doFinal(padString(text).getBytes());
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} catch (Exception e)
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{
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throw new Exception("[encrypt] " + e.getMessage());
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}
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return encrypted;
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}
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public byte[] decrypt(String code) throws Exception
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{
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if(code == null || code.length() == 0)
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throw new Exception("Empty string");
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byte[] decrypted = null;
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try {
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cipher.init(Cipher.DECRYPT_MODE, keyspec, ivspec);
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decrypted = cipher.doFinal(hexToBytes(code));
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} catch (Exception e)
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{
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throw new Exception("[decrypt] " + e.getMessage());
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}
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return decrypted;
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}
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public static String bytesToHex(byte[] data)
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{
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if (data==null)
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{
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return null;
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}
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int len = data.length;
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String str = "";
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for (int i=0; i<len; i++) {
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if ((data[i] 0xFF)<16)
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str = str + "0" + java.lang.Integer.toHexString(data[i] 0xFF);
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else
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str = str + java.lang.Integer.toHexString(data[i] 0xFF);
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}
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return str;
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}
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public static byte[] hexToBytes(String str) {
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if (str==null) {
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return null;
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} else if (str.length() < 2) {
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return null;
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} else {
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int len = str.length() / 2;
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byte[] buffer = new byte[len];
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for (int i=0; i<len; i++) {
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buffer[i] = (byte) Integer.parseInt(str.substring(i*2,i*2+2),16);
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}
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return buffer;
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}
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}
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private static String padString(String source)
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{
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char paddingChar = ' ';
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int size = 16;
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int x = source.length() % size;
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int padLength = size - x;
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for (int i = 0; i < padLength; i++)
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{
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source += paddingChar;
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}
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return source;
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}
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}
[代码] mcrypt.php
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/**********/
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/**PHP**/
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<?php
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class MCrypt
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{
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private $iv = 'fedcba9876543210'; #Same as in JAVA
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private $key = '0123456789abcdef'; #Same as in JAVA
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function __construct()
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{
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}
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function encrypt($str) {
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//$key = $this->hex2bin($key);
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$iv = $this->iv;
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$td = mcrypt_module_open('rijndael-128', '', 'cbc', $iv);
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mcrypt_generic_init($td, $this->key, $iv);
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$encrypted = mcrypt_generic($td, $str);
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mcrypt_generic_deinit($td);
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mcrypt_module_close($td);
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return bin2hex($encrypted);
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}
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function decrypt($code) {
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//$key = $this->hex2bin($key);
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$code = $this->hex2bin($code);
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$iv = $this->iv;
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$td = mcrypt_module_open('rijndael-128', '', 'cbc', $iv);
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mcrypt_generic_init($td, $this->key, $iv);
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$decrypted = mdecrypt_generic($td, $code);
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mcrypt_generic_deinit($td);
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mcrypt_module_close($td);
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return utf8_encode(trim($decrypted));
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}
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protected function hex2bin($hexdata) {
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$bindata = '';
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for ($i = 0; $i < strlen($hexdata); $i += 2) {
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$bindata .= chr(hexdec(substr($hexdata, $i, 2)));
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}
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return $bindata;
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}
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}
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// see http://androidsnippets.com/encrypt-decrypt-between-android-and-php
