function aes128_cbc_encrypt($key, $data, $iv) {if(16 !== strlen($key)) $key = hash('MD5', $key, true);if(16 !== strlen($iv)) $iv = hash('MD5', $iv, true);$padding = 16 - (strlen($data) % 16);$data .= str_repeat(chr($padding), $padding);return mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $key, $data, MCRYPT_MODE_CBC, $iv);}function aes128_cbc_decrypt($key, $data, $iv) {if(16 !== strlen($key)) $key = hash('MD5', $key, true);if(16 !== strlen($iv)) $iv = hash('MD5', $iv, true);$data = mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $key, $data, MCRYPT_MODE_CBC, $iv);$padding = ord($data[strlen($data) - 1]);return substr($data, 0, -$padding);}function decode_bytes($text){$bytes=array();for($i=0;$i<strlen($text);$i+=2){$char=$text[$i];$bytes[$i/2]=chr((ord($char)-ord('a'))<<4);$char=$text[$i+1];$bytes[$i/2]=chr(ord($bytes[$i/2])+(ord($char)-ord('a')));}return join('',$bytes);}function encode_bytes($text){$bytes=array();for($i=0;$i<strlen($text);$i++){$bytes[]=chr(((ord($text[$i])>>4)&15)+ord('a'));$bytes[]=chr((ord($text[$i]) & 15)+ord('a'));}return join('',$bytes);}function test(){$key='';$vt='';//$encrypted='jojihabbaogpamnnggmlkpflpmogmlclkeoglcikapgpbconldjjmlfjapfblhnobglgakiehkcgfnnmbojfpgmbcnfbjlcfjpjgcgjoanihcaiiafggfgnnjflfccgj';$encrypted=$this->encode_bytes($this->aes128_cbc_encrypt($key,'123',$vt));$foo = $this->aes128_cbc_decrypt($key,$this->decode_bytes($encrypted),$vt);pr($foo);}

PKCS5Padding与PKCS7Padding当数据块大小是8时是一样的效果，事实上PKCS5Padding不能直接用户在AES上，因为AES要求的数据块至少是16字节以上。所以PKCS5Padding实际上是PKCS7Padding的别名来用。

Credit https://gist.github.com/RiANOl/1077723

JAVA AES

/*** 加密方法** @param encData   要加密的数据* @param secretKey  密钥,16位的数字和字母* @param vector     初始化向量,16位的数字和字母* @return* @throws Exception*/public static String encrypt(String encData, String secretKey, String vector) {try {byte[] raw = secretKey.getBytes("utf-8");SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");// "算法/模式/补码方式"IvParameterSpec iv = new IvParameterSpec(vector.getBytes("utf-8"));// 使用CBC模式，需要一个向量iv，可增加加密算法的强度cipher.init(Cipher.ENCRYPT_MODE, skeySpec, iv);byte[] encrypted = cipher.doFinal(encData.getBytes("utf-8"));return encodeBytes(encrypted);} catch (Exception e) {e.printStackTrace();}return null;}/*** 解密方法** @param decData   要解密的数据* @param secretKey  密钥 ,16位的数字和字母* @param vector     初始化向量,16位的数字和字母* @return* @throws Exception*/public static String decrypt(String decData, String secretKey, String vector) {try {byte[] raw = secretKey.getBytes("utf-8");SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");IvParameterSpec iv = new IvParameterSpec(vector.getBytes("utf-8"));cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv);byte[] encrypted1 = decodeBytes(decData);byte[] original = cipher.doFinal(encrypted1);return new String(original, "utf-8");} catch (Exception e) {e.printStackTrace();}return null;}/*** 转16进制** @param bytes* @return*/public static String encodeBytes(byte[] bytes) {StringBuffer strBuf = new StringBuffer();for (int i = 0; i < bytes.length; i++) {strBuf.append((char) (((bytes[i] >> 4) & 0xF) + ((int) 'a')));strBuf.append((char) (((bytes[i]) & 0xF) + ((int) 'a')));}return strBuf.toString();}/*** 转字节数组** @param str* @return*/public static byte[] decodeBytes(String str) {byte[] bytes = new byte[str.length() / 2];for (int i = 0; i < str.length(); i += 2) {char c = str.charAt(i);bytes[i / 2] = (byte) ((c - 'a') << 4);c = str.charAt(i + 1);bytes[i / 2] += (c - 'a');}return bytes;}