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/*
* SCAN Name Abstraction
* (C) 2008 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
#ifndef BOTAN_SCAN_NAME_H__
#define BOTAN_SCAN_NAME_H__
#include <botan/types.h>
#include <string>
#include <vector>
#include <mutex>
#include <map>
namespace Botan {
/**
A class encapsulating a SCAN name (similar to JCE conventions)
http://www.users.zetnet.co.uk/hopwood/crypto/scan/
*/
class BOTAN_DLL SCAN_Name
{
public:
/**
* @param algo_spec A SCAN-format name
*/
SCAN_Name(std::string algo_spec);
/**
* @return original input string
*/
std::string as_string() const { return orig_algo_spec; }
/**
* @return algorithm name
*/
std::string algo_name() const { return alg_name; }
/**
* @return algorithm name plus any arguments
*/
std::string algo_name_and_args() const;
/**
* @return number of arguments
*/
size_t arg_count() const { return args.size(); }
/**
* @param lower is the lower bound
* @param upper is the upper bound
* @return if the number of arguments is between lower and upper
*/
bool arg_count_between(size_t lower, size_t upper) const
{ return ((arg_count() >= lower) && (arg_count() <= upper)); }
/**
* @param i which argument
* @return ith argument
*/
std::string arg(size_t i) const;
/**
* @param i which argument
* @param def_value the default value
* @return ith argument or the default value
*/
std::string arg(size_t i, const std::string& def_value) const;
/**
* @param i which argument
* @param def_value the default value
* @return ith argument as an integer, or the default value
*/
size_t arg_as_integer(size_t i, size_t def_value) const;
/**
* @return cipher mode (if any)
*/
std::string cipher_mode() const
{ return (mode_info.size() >= 1) ? mode_info[0] : ""; }
/**
* @return cipher mode padding (if any)
*/
std::string cipher_mode_pad() const
{ return (mode_info.size() >= 2) ? mode_info[1] : ""; }
static void add_alias(const std::string& alias, const std::string& basename);
static std::string deref_alias(const std::string& alias);
static void set_default_aliases();
private:
static std::mutex s_alias_map_mutex;
static std::map<std::string, std::string> s_alias_map;
std::string orig_algo_spec;
std::string alg_name;
std::vector<std::string> args;
std::vector<std::string> mode_info;
};
}
#endif
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