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php中AES加密解密的例子小结

PHP admin 12个月前 (06-08) 8次浏览 未收录 0个评论

aesDemo.php:

例子,

makeKey($key);
$encode = "123456";// 被加密的字符串
$ct = $aes->encryptString($encode, $keys);
echo "encode = ".$ct."
"; $cpt = $aes->decryptString($ct, $keys); echo "decode = ".$cpt; ?>

例子、AES加密类

bit = $bit;
$this->key = $key;
$this->iv = $iv;
$this->mode = $mode;
switch($this->bit) {
case 192:$this->cipher = MCRYPT_RIJNDAEL_192; break;
case 256:$this->cipher = MCRYPT_RIJNDAEL_256; break;
default: $this->cipher = MCRYPT_RIJNDAEL_128;
}
switch($this->mode) {
case 'ecb':$this->mode = MCRYPT_MODE_ECB; break;
case 'cfb':$this->mode = MCRYPT_MODE_CFB; break;
case 'ofb':$this->mode = MCRYPT_MODE_OFB; break;
case 'nofb':$this->mode = MCRYPT_MODE_NOFB; break;
default: $this->mode = MCRYPT_MODE_CBC;
}
}
public function encrypt($data) {
$data = base64_encode(mcrypt_encrypt( $this->cipher, $this->key, $data, $this->mode, $this->iv));
return $data;
}
public function decrypt($data) {
$data = mcrypt_decrypt( $this->cipher, $this->key, base64_decode($data), $this->mode, $this->iv);
$data = rtrim(rtrim($data), "..");
return $data;
}
}
//使用方法
$aes = new AESMcrypt($bit = 128, $key = 'abcdef1234567890', $iv = '0987654321fedcba', $mode = 'cbc');
$c = $aes->encrypt('haowei.me');
var_dump($aes->decrypt($c));

例子、附一个可加密可解密类

<?PHP
/**
 * AES加密、解密类
 * @author hushangming
 * 
 * 用法:
 * 
 * // 实例化类
 * // 参数$_bit:格式,支持256、192、128,默认为128字节的
 * // 参数$_type:加密/解密方式,支持cfb、cbc、nofb、ofb、stream、ecb,默认为ecb
 * // 参数$_key:密钥,默认为abcdefghijuklmno
 * $tcaes = new TCAES(); 
 * $string = 'laohu';
 * // 加密
 * $encodeString = $tcaes->encode($string);
 * // 解密
 * $decodeString = $tcaes->decode($encodeString);
 * 

*/
class TCAES{
private $_bit = MCRYPT_RIJNDAEL_256;
private $_type = MCRYPT_MODE_CBC;
//private $_key = 'abcdefghijuklmno0123456789012345';
private $_key = 'abcdefghijuklmno'; // 密钥
private $_use_base64 = true;
private $_iv_size = null;
private $_iv = null;

/**
* @param string $_key 密钥
* @param int $_bit 默认使用128字节
* @param string $_type 加密解密方式
* @param boolean $_use_base64 默认使用base64二次加密
*/
public function __construct($_key = '', $_bit = 128, $_type = 'ecb', $_use_base64 = true){
// 加密字节
if(192 === $_bit){
$this->_bit = MCRYPT_RIJNDAEL_192;
}elseif(128 === $_bit){
$this->_bit = MCRYPT_RIJNDAEL_128;
}else{
$this->_bit = MCRYPT_RIJNDAEL_256;
}
// 加密方法
if('cfb' === $_type){
$this->_type = MCRYPT_MODE_CFB;
}elseif('cbc' === $_type){
$this->_type = MCRYPT_MODE_CBC;
}elseif('nofb' === $_type){
$this->_type = MCRYPT_MODE_NOFB;
}elseif('ofb' === $_type){
$this->_type = MCRYPT_MODE_OFB;
}elseif('stream' === $_type){
$this->_type = MCRYPT_MODE_STREAM;
}else{
$this->_type = MCRYPT_MODE_ECB;
}
// 密钥
if(!empty($_key)){
$this->_key = $_key;
}
// 是否使用base64
$this->_use_base64 = $_use_base64;

$this->_iv_size = mcrypt_get_iv_size($this->_bit, $this->_type);
$this->_iv = mcrypt_create_iv($this->_iv_size, MCRYPT_RAND);
}

/**
* 加密
* @param string $string 待加密字符串
* @return string
*/
public function encode($string){
if(MCRYPT_MODE_ECB === $this->_type){
$encodeString = mcrypt_encrypt($this->_bit, $this->_key, $string, $this->_type);
}else{
$encodeString = mcrypt_encrypt($this->_bit, $this->_key, $string, $this->_type, $this->_iv);
}
if($this->_use_base64)
$encodeString = base64_encode($encodeString);
return $encodeString;
}

/**
* 解密
* @param string $string 待解密字符串
* @return string
*/
public function decode($string){
if($this->_use_base64)
$string = base64_decode($string);

$string = $this->toHexString($string);
if(MCRYPT_MODE_ECB === $this->_type){
$decodeString = mcrypt_decrypt($this->_bit, $this->_key, $string, $this->_type);
}else{
$decodeString = mcrypt_decrypt($this->_bit, $this->_key, $string, $this->_type, $this->_iv);
}
return $decodeString;
}

/**
* 将$string转换成十六进制
* @param string $string
* @return stream
*/
private function toHexString ($string){
$buf = "";
for ($i = 0; $i < strlen($string); $i++){
$val = dechex(ord($string{$i}));
if(strlen($val)< 2)
$val = "0".$val;
$buf .= $val;
}
return $buf;
}

/**
* 将十六进制流$string转换成字符串
* @param stream $string
* @return string
*/
private function fromHexString($string){
$buf = "";
for($i = 0; $i < strlen($string); $i += 2){
$val = chr(hexdec(substr($string, $i, 2)));
$buf .= $val;
}
return $buf;
}
}

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