Androidモバイル端末とPHPサービス端末の対称暗号解読の実現!
5413 ワード
class ApiCrypter{
private $iv = 'fdsfds85435nfdfs'; # JAVA
private $key = '89432hjfsd891787'; # JAVA
public function __construct() {
}
public function encrypt($str) {
$str = $this->pkcs5_pad($str);
$iv = $this->iv;
$td = mcrypt_module_open('rijndael-128', '', 'cbc', $iv);
mcrypt_generic_init($td, $this->key, $iv);
$encrypted = mcrypt_generic($td, $str);
mcrypt_generic_deinit($td);
mcrypt_module_close($td);
return bin2hex($encrypted);
}
public function decrypt($code) {
$code = $this->hex2bin($code);
$iv = $this->iv;
$td = mcrypt_module_open('rijndael-128', '', 'cbc', $iv);
mcrypt_generic_init($td, $this->key, $iv);
$decrypted = mdecrypt_generic($td, $code);
mcrypt_generic_deinit($td);
mcrypt_module_close($td);
$ut = utf8_encode(trim($decrypted));
return $this->pkcs5_unpad($ut);
}
protected function hex2bin($hexdata) {
$bindata = '';
for ($i = 0; $i < strlen($hexdata); $i += 2) {
$bindata .= chr(hexdec(substr($hexdata, $i, 2)));
}
return $bindata;
}
protected function pkcs5_pad ($text) {
$blocksize = 16;
$pad = $blocksize - (strlen($text) % $blocksize);
return $text . str_repeat(chr($pad), $pad);
}
protected function pkcs5_unpad($text) {
$pad = ord($text{strlen($text)-1});
if ($pad > strlen($text)) {
return false;
}
if (strspn($text, chr($pad), strlen($text) - $pad) != $pad) {
return false;
}
return substr($text, 0, -1 * $pad);
}
}
package com.cwilldev.crypt;
import java.security.NoSuchAlgorithmException;
import javax.crypto.Cipher;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
public class ApiCrypter {
private String iv = "fdsfds85435nfdfs"; //
private String secretkey = "89432hjfsd891787"; //
private IvParameterSpec ivspec;
private SecretKeySpec keyspec;
private Cipher cipher;
public ApiCrypter()
{
ivspec = new IvParameterSpec(iv.getBytes());
keyspec = new SecretKeySpec(secretkey.getBytes(), "AES");
try {
cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
} catch (NoSuchPaddingException e) {
e.printStackTrace();
}
}
public byte[] encrypt(String text) throws Exception
{
if(text == null || text.length() == 0) {
throw new Exception("Empty string");
}
byte[] encrypted = null;
try {
cipher.init(Cipher.ENCRYPT_MODE, keyspec, ivspec);
encrypted = cipher.doFinal(text.getBytes("UTF-8"));
}
catch (Exception e) {
throw new Exception("[encrypt] " + e.getMessage());
}
return encrypted;
}
public byte[] decrypt(String code) throws Exception
{
if(code == null || code.length() == 0) {
throw new Exception("Empty string");
}
byte[] decrypted = null;
try {
cipher.init(Cipher.DECRYPT_MODE, keyspec, ivspec);
decrypted = cipher.doFinal(hexToBytes(code));
}
catch (Exception e) {
throw new Exception("[decrypt] " + e.getMessage());
}
return decrypted;
}
public static String bytesToHex(byte[] data)
{
if (data==null) {
return null;
}
int len = data.length;
String str = "";
for (int i=0; i public static byte[] hexToBytes(String str) {
if (str==null) {
return null;
}
else if (str.length() < 2) {
return null;
}
else {
int len = str.length() / 2;
byte[] buffer = new byte[len];
for (int i=0; i$original_text = 'test';
$mdes = new ApiCrypterUtil();
//
$encrypt_text = $mdes->encrypt($original_text);
$this->log($encrypt_text, LOG_DEBUG);
//
$this->log($mdes->decrypt($encrypt_text), LOG_DEBUG);
// :
ApiCrypter apiCrypter = new ApiCrypter();
String originalText = "test";
String encryptedText = ApiCrypter.bytesToHex(apiCrypter.encrypt(jsonParams.toString()));
// :
String res = new String(apiCrypter.decrypt(encryptedText), "UTF-8");
String decryptedText = URLDecoder.decode(res, "UTF-8");