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;
}
