欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识!
您现在的位置是: 首页  >  php教程

PHP blowfish 加密解密函数

程序员文章站 2022-04-02 15:41:29
...
跳至 [1] [全屏预览]
pkcs5_pad($str, $size);

		if (mcrypt_generic_init($cipher, $this->key, $this->iv) != -1)
        {
           $cipherText = mcrypt_generic($cipher, $str);
           mcrypt_generic_deinit($cipher);

           return base64_encode($cipherText);
        }

        mcrypt_module_close($cipher);
	}

	/**
	 * blowfish + cbc模式 + pkcs5  解密 去补码
	 * @param string $str 加密的数据
	 * @return string 解密的数据
	 */
	public function blowfish_cbc_pkcs5_decrypt($str)
	{
		$cipher = mcrypt_module_open(MCRYPT_BLOWFISH, '', MCRYPT_MODE_CBC, '');

		if (mcrypt_generic_init($cipher, $this->key, $this->iv) != -1)
        {
           $cipherText = mdecrypt_generic($cipher, base64_decode($str));
           mcrypt_generic_deinit($cipher);

           return $this->pkcs5_unpad($cipherText);
        }

		mcrypt_module_close($cipher);
	}

	private function pkcs5_pad($text, $blocksize){
		$pad = $blocksize - (strlen ( $text ) % $blocksize);
		return $text . str_repeat ( chr ( $pad ), $pad );
	}

	private function pkcs5_unpad($str){
		$pad = ord($str[($len = strlen($str)) - 1]);
		return substr($str, 0, strlen($str) - $pad);
	}
}