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/**
SCAN Name Abstraction
(C) 2008 Jack Lloyd
*/
#ifndef BOTAN_SCAN_NAME_H__
#define BOTAN_SCAN_NAME_H__
#include <botan/types.h>
#include <string>
#include <vector>
#include <set>
namespace Botan {
/**
A class encapsulating a SCAN name (similar to JCE conventions)
http://www.users.zetnet.co.uk/hopwood/crypto/scan/
*/
class SCAN_Name
{
public:
/**
@param algo_spec A SCAN name
@param providers An optional provider name
*/
SCAN_Name(const std::string& algo_spec,
const std::string& providers = "");
/**
@return the original input string
*/
std::string as_string() const { return orig_algo_spec; }
/**
@return the provider name (or empty)
*/
std::string provider() const { return m_provider; }
/**
@return the algorithm name
*/
std::string algo_name() const { return name[0]; }
/**
@return the number of arguments
*/
u32bit arg_count() const { return name.size() - 1; }
/**
@param provider a provider name
@returns if this provider was allowed by the request
*/
bool provider_allowed(const std::string& provider) const
{
return (m_provider == "" || m_provider == provider);
}
/**
@return if the number of arguments is between lower and upper
*/
bool arg_count_between(u32bit lower, u32bit upper) const
{ return ((arg_count() >= lower) && (arg_count() <= upper)); }
/**
@param i which argument
@return the ith argument
*/
std::string arg_as_string(u32bit i) const;
/**
@param i which argument
@return the ith argument
*/
SCAN_Name arg(u32bit i) const;
/**
@param i which argument
@return the ith argument as a u32bit, or a default value
*/
u32bit arg_as_u32bit(u32bit i, u32bit def_value) const;
private:
std::string orig_algo_spec, m_provider;
std::vector<std::string> name;
};
}
#endif
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