[小代码]在Android和PHP之间的加密/解密,AES加密

Android和PHP上的加、解密字符串。

android上使用：

mcrypt = new MCrypt();/* 加密*/String encrypted = MCrypt.bytesToHex( mcrypt.encrypt("需加密的字符") );/* 解密*/String decrypted = new String( mcrypt.decrypt( encrypted ) );

PHP上使用：

$mcrypt = new MCrypt();#Encrypt$encrypted = $mcrypt->encrypt("需加密的字符");#Decrypt$decrypted = $mcrypt->decrypt($encrypted);

android代码：

/***********//**JAVA**/        import java.security.NoSuchAlgorithmException;        import javax.crypto.Cipher;        import javax.crypto.NoSuchPaddingException;        import javax.crypto.spec.IvParameterSpec;        import javax.crypto.spec.SecretKeySpec;        public class MCrypt {                private String iv = "fedcba9876543210";//虚拟的 iv (需更改)                private IvParameterSpec ivspec;                private SecretKeySpec keyspec;                private Cipher cipher;                                private String SecretKey = "0123456789abcdef";//虚拟的 密钥 (需更改）                                public MCrypt()                {                        ivspec = new IvParameterSpec(iv.getBytes());                        keyspec = new SecretKeySpec(SecretKey.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) 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(padString(text).getBytes());                        } 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<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;                }        }

PHP代码：

/**********//**PHP**/        <?php         class MCrypt        {                private $iv = 'fedcba9876543210'; #和上面JAVA中的一样                private $key = '0123456789abcdef'; #和上面JAVA中的一样                function __construct()                {                }                function encrypt($str) {                  //$key = $this->hex2bin($key);                      $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);                }                function decrypt($code) {                  //$key = $this->hex2bin($key);                  $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($td);                  return utf8_encode(trim($decrypted));                }                protected function hex2bin($hexdata) {                  $bindata = '';                  for ($i = 0; $i < strlen($hexdata); $i += 2) {                        $bindata .= chr(hexdec(substr($hexdata, $i, 2)));                  }                  return $bindata;                }        }

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