AES指高級(jí)加密標(biāo)準(zhǔn)（Advanced Encryption Standard）,是當(dāng)前最流行的一種密碼算法，在web應(yīng)用開發(fā)，特別是對(duì)外提供接口時(shí)經(jīng)常會(huì)用到，下面是我整理的一套php與java通用的AES加密解密算法。
php版代碼如下：
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<?php
class CryptAES
{
protected $cipher = MCRYPT_RIJNDAEL_128;
protected $mode = MCRYPT_MODE_ECB;
protected $pad_method = NULL;
protected $secret_key = '';
protected $iv = '';
public function set_cipher($cipher)
{
$this->cipher = $cipher;
}
public function set_mode($mode)
{
$this->mode = $mode;
}
public function set_iv($iv)
{
$this->iv = $iv;
}
public function set_key($key)
{
$this->secret_key = $key;
}
public function require_pkcs5()
{
$this->pad_method = 'pkcs5';
}
protected function pad_or_unpad($str, $ext)
{
if ( is_null($this->pad_method) )
{
return $str;
}
else
{
$func_name = __CLASS__ . '::' . $this->pad_method . '_' . $ext . 'pad';
if ( is_callable($func_name) )
{
$size = mcrypt_get_block_size($this->cipher, $this->mode);
return call_user_func($func_name, $str, $size);
}
}
return $str;
}
protected function pad($str)
{
return $this->pad_or_unpad($str, '');
}
protected function unpad($str)
{
return $this->pad_or_unpad($str, 'un');
}
public function encrypt($str)
{
$str = $this->pad($str);
$td = mcrypt_module_open($this->cipher, '', $this->mode, '');
if ( empty($this->iv) )
{
$iv = @mcrypt_create_iv(mcrypt_enc_get_iv_size($td), MCRYPT_RAND);
}
else
{
$iv = $this->iv;
}
mcrypt_generic_init($td, $this->secret_key, $iv);
$cyper_text = mcrypt_generic($td, $str);
$rt=base64_encode($cyper_text);
//$rt = bin2hex($cyper_text);
mcrypt_generic_deinit($td);
mcrypt_module_close($td);
return $rt;
}
public function decrypt($str){
$td = mcrypt_module_open($this->cipher, '', $this->mode, '');
if ( empty($this->iv) )
{
$iv = @mcrypt_create_iv(mcrypt_enc_get_iv_size($td), MCRYPT_RAND);
}
else
{
$iv = $this->iv;
}
mcrypt_generic_init($td, $this->secret_key, $iv);
//$decrypted_text = mdecrypt_generic($td, self::hex2bin($str));
$decrypted_text = mdecrypt_generic($td, base64_decode($str));
$rt = $decrypted_text;
mcrypt_generic_deinit($td);
mcrypt_module_close($td);
return $this->unpad($rt);
}
public static function hex2bin($hexdata) {
$bindata = '';
$length = strlen($hexdata);
for ($i=0; $i amp;< $length; $i += 2)
{
$bindata .= chr(hexdec(substr($hexdata, $i, 2)));
}
return $bindata;
}
public static function pkcs5_pad($text, $blocksize)
{
$pad = $blocksize - (strlen($text) % $blocksize);
return $text . str_repeat(chr($pad), $pad);
}
public static function pkcs5_unpad($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);
}
}
$keyStr = 'UITN25LMUQC436IM';
$plainText = 'this is a string will be AES_Encrypt';
$aes = new CryptAES();
$aes->set_key($keyStr);
$aes->require_pkcs5();
$encText = $aes->encrypt($plainText);
$decString = $aes->decrypt($encText);
echo $encText,"n",$decString;
?>
運(yùn)行結(jié)果：
fhTD0NNIzv4jUEhJuC1htFFXJ/4S/rL6tDCJPiNvJ8mVLHWOD0HWweuxHynxoZf9
this is a string will be AES_Encrypt
java版代碼如下：
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import java.security.Key;
import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;
import org.apache.commons.codec.binary.Base64;
public class CryptAES {
private static final String AESTYPE ="AES/ECB/PKCS5Padding";
public static String AES_Encrypt(String keyStr, String plainText) {
byte[] encrypt = null;
try{
Key key = generateKey(keyStr);
Cipher cipher = Cipher.getInstance(AESTYPE);
cipher.init(Cipher.ENCRYPT_MODE, key);
encrypt = cipher.doFinal(plainText.getBytes());
}catch(Exception e){
e.printStackTrace();
}
return new String(Base64.encodeBase64(encrypt));
}
public static String AES_Decrypt(String keyStr, String encryptData) {
byte[] decrypt = null;
try{
Key key = generateKey(keyStr);
Cipher cipher = Cipher.getInstance(AESTYPE);
cipher.init(Cipher.DECRYPT_MODE, key);
decrypt = cipher.doFinal(Base64.decodeBase64(encryptData));
}catch(Exception e){
e.printStackTrace();
}
return new String(decrypt).trim();
}
private static Key generateKey(String key)throws Exception{
try{
SecretKeySpec keySpec = new SecretKeySpec(key.getBytes(), "AES");
return keySpec;
}catch(Exception e){
e.printStackTrace();
throw e;
}
}
public static void main(String[] args) {
String keyStr = "UITN25LMUQC436IM";
String plainText = "this is a string will be AES_Encrypt";
String encText = AES_Encrypt(keyStr, plainText);
String decString = AES_Decrypt(keyStr, encText);
System.out.println(encText);
System.out.println(decString);
}
}
運(yùn)行結(jié)果：
fhTD0NNIzv4jUEhJuC1htFFXJ/4S/rL6tDCJPiNvJ8mVLHWOD0HWweuxHynxoZf9
this is a string will be AES_Encrypt
