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<?php
namespace B2\Modules\Common;
class crypt
{
/**
* 私钥
*
*/
private $_privKey;
/**
* 公钥
*
*/
private $_pubKey;
/**
* 保存文件地址
*/
private $_keyPath;
/**
* 指定密钥文件地址
*
*/
public function __construct($path)
{
if (empty($path) || !is_dir($path)) {
throw new Exception('请指定密钥文件地址目录');
}
$this->_keyPath = $path;
}
/**
* 创建公钥和私钥
*
*/
public function createKey()
{
$config = [
"config" => 'D:\wamp\bin\apache\apache2.4.9\conf\openssl.cnf',
"digest_alg" => "sha512",
"private_key_bits" => 4096,
"private_key_type" => OPENSSL_KEYTYPE_RSA,
];
// 生成私钥
$rsa = openssl_pkey_new($config);
openssl_pkey_export($rsa, $privKey, NULL, $config);
file_put_contents($this->_keyPath . DIRECTORY_SEPARATOR . 'priv.key', $privKey);
$this->_privKey = openssl_pkey_get_public($privKey);
// 生成公钥
$rsaPri = openssl_pkey_get_details($rsa);
$pubKey = $rsaPri['key'];
file_put_contents($this->_keyPath . DIRECTORY_SEPARATOR . 'pub.key', $pubKey);
$this->_pubKey = openssl_pkey_get_public($pubKey);
}
/**
* 设置私钥
*
*/
public function setupPrivKey()
{
if (is_resource($this->_privKey)) {
return true;
}
$file = $this->_keyPath . DIRECTORY_SEPARATOR . 'priv.key';
$privKey = file_get_contents($file);
$this->_privKey = openssl_pkey_get_private($privKey);
return true;
}
/**
* 设置公钥
*
*/
public function setupPubKey()
{
if (is_resource($this->_pubKey)) {
return true;
}
$file = $this->_keyPath . DIRECTORY_SEPARATOR . 'pub.key';
$pubKey = file_get_contents($file);
$this->_pubKey = openssl_pkey_get_public($pubKey);
return true;
}
/**
* 用私钥加密
*
*/
public function privEncrypt($data)
{
if (!is_string($data)) {
return null;
}
$this->setupPrivKey();
$result = openssl_private_encrypt($data, $encrypted, $this->_privKey);
if ($result) {
return base64_encode($encrypted);
}
return null;
}
/**
* 私钥解密
*
*/
public function privDecrypt($encrypted)
{
if (!is_string($encrypted)) {
return null;
}
$this->setupPrivKey();
$encrypted = base64_decode($encrypted);
$result = openssl_private_decrypt($encrypted, $decrypted, $this->_privKey);
if ($result) {
return $decrypted;
}
return null;
}
/**
* 公钥加密
*
*/
public function pubEncrypt($data)
{
if (!is_string($data)) {
return null;
}
$this->setupPubKey();
$result = openssl_public_encrypt($data, $encrypted, $this->_pubKey);
if ($result) {
return base64_encode($encrypted);
}
return null;
}
/**
* 公钥解密
*
*/
public function pubDecrypt($crypted)
{
if (!is_string($crypted)) {
return null;
}
$this->setupPubKey();
$crypted = base64_decode($crypted);
$result = openssl_public_decrypt($crypted, $decrypted, $this->_pubKey);
if ($result) {
return $decrypted;
}
return null;
}
/**
* __destruct
*
*/
public function __destruct()
{
@fclose($this->_privKey);
@fclose($this->_pubKey);
}
}