//provParam 提供程序参数
import crypt;

namespace crypt;

class provParam{
	ctor( cryptContent ){
		this.cryptContent = cryptContent;
	};
	get = function(dwParam,data,flags){
		var size = {INT value}
		if(dwParam!=0x26/*_PP_USE_HARDWARE_RNG*/){
			if(!data){
				if(!::Advapi32.CryptGetProvParam(this.cryptContent.hCryptProv,dwParam,null,size,flags))return;
				data = ..raw.buffer(size.value);
			}
			else {
				size.value = data[["_struct"]] ?  ..raw.sizeof(data) : #data ;
			} 
		} 
		
		if( ::Advapi32.CryptGetProvParam(this.cryptContent.hCryptProv,dwParam,data,size,flags) ){
			return data || true;
		}
	};
}

/**intellisense()
crypt.provParam(.(cryptObject) = 参数指定 crypt 对象
crypt.provParam() = !cryptProvParam.
!cryptProvParam.get(.(dwParam,data,flags) = @dwParam 使用数值指定获取参数,\n@data 可指定 struct,buffer 或 null 值,\n成功返回获取数据。\n用法参考源码以及 ::Advapi32.CryptGetProvParam 文档
end intellisense**/