這篇文章主要介紹了使用openssl實現rsa非對稱加密算法的示例,大家參考使用吧
代碼如下: <?php /** * 使用openssl實現非對稱加密 * @since 2010-07-08 */ class Rsa { /** * private key */ private $_privKey; /** * public key */ private $_pubKey; /** * the keys saving path */ private $_keyPath; /** * the construtor,the param $path is the keys saving path */ public function __construct($path) { if(empty($path) || !is_dir($path)){ throw new Exception('Must set the keys save path'); } $this->_keyPath = $path; } /** * create the key pair,save the key to $this->_keyPath */ public function createKey() { $r = openssl_pkey_new(); openssl_pkey_export($r, $privKey); file_put_contents($this->_keyPath . DIRECTORY_SEPARATOR . 'priv.key', $privKey); $this->_privKey = openssl_pkey_get_public($privKey); $rp = openssl_pkey_get_details($r); $pubKey = $rp['key']; file_put_contents($this->_keyPath . DIRECTORY_SEPARATOR . 'pub.key', $pubKey); $this->_pubKey = openssl_pkey_get_public($pubKey); } /** * setup the private key */ public function setupPrivKey() { if(is_resource($this->_privKey)){ return true; } $file = $this->_keyPath . DIRECTORY_SEPARATOR . 'priv.key'; $prk = file_get_contents($file); $this->_privKey = openssl_pkey_get_private($prk); return true; } /** * setup the public key */ public function setupPubKey() { if(is_resource($this->_pubKey)){ return true; } $file = $this->_keyPath . DIRECTORY_SEPARATOR . 'pub.key'; $puk = file_get_contents($file); $this->_pubKey = openssl_pkey_get_public($puk); return true; } /** * encrypt with the private key */ public function privEncrypt($data) { if(!is_string($data)){ return null; } $this->setupPrivKey(); $r = openssl_private_encrypt($data, $encrypted, $this->_privKey); if($r){ return base64_encode($encrypted); } return null; } /** * decrypt with the private key */ public function privDecrypt($encrypted) { if(!is_string($encrypted)){ return null; } $this->setupPrivKey(); $encrypted = base64_decode($encrypted); $r = openssl_private_decrypt($encrypted, $decrypted, $this->_privKey); if($r){ return $decrypted; } return null; } /** * encrypt with public key */ public function pubEncrypt($data) { if(!is_string($data)){ return null; } $this->setupPubKey(); $r = openssl_public_encrypt($data, $encrypted, $this->_pubKey); if($r){ return base64_encode($encrypted); } return null; } /** * decrypt with the public key */ public function pubDecrypt($crypted) { if(!is_string($crypted)){ return null;