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/*************************************************
* Configuration Handling Source File *
* (C) 1999-2006 The Botan Project *
*************************************************/
#include <botan/conf.h>
#include <botan/libstate.h>
#include <botan/lookup.h>
#include <botan/charset.h>
#include <botan/parsing.h>
#include <string>
namespace Botan {
namespace Config {
/*************************************************
* Set an option *
*************************************************/
void set(const std::string& name, const std::string& value, bool overwrite)
{
global_state().set_option("conf", name, value, overwrite);
}
/*************************************************
* Get the value of an option as a string *
*************************************************/
std::string get_string(const std::string& name)
{
return global_state().get_option("conf", name);
}
/*************************************************
* Get the value as a list of strings *
*************************************************/
std::vector<std::string> get_list(const std::string& name)
{
return split_on(get_string(name), ':');
}
/*************************************************
* Get the value as a u32bit *
*************************************************/
u32bit get_u32bit(const std::string& name)
{
return parse_expr(get_string(name));
}
/*************************************************
* Get the value as a time *
*************************************************/
u32bit get_time(const std::string& name)
{
const std::string timespec = get_string(name);
if(timespec == "")
return 0;
const char suffix = timespec[timespec.size()-1];
std::string value = timespec.substr(0, timespec.size()-1);
u32bit scale = 1;
if(is_digit(suffix))
value += suffix;
else if(suffix == 's')
scale = 1;
else if(suffix == 'm')
scale = 60;
else if(suffix == 'h')
scale = 60 * 60;
else if(suffix == 'd')
scale = 24 * 60 * 60;
else if(suffix == 'y')
scale = 365 * 24 * 60 * 60;
else
throw Decoding_Error("Config::get_time: Unknown time value " + value);
return scale * to_u32bit(value);
}
/*************************************************
* Get the value as a boolean *
*************************************************/
bool get_bool(const std::string& name)
{
const std::string value = get_string(name);
if(value == "0" || value == "false")
return false;
if(value == "1" || value == "true")
return true;
throw Decoding_Error("Config::get_bool: Unknown boolean value " + value);
}
/*************************************************
* Choose the signature format for a PK algorithm *
*************************************************/
void choose_sig_format(const std::string& algo_name, std::string& padding,
Signature_Format& format)
{
std::string dummy;
choose_sig_format(algo_name, padding, dummy, format);
}
/*************************************************
* Choose the signature format for a PK algorithm *
*************************************************/
void choose_sig_format(const std::string& algo_name, std::string& padding,
std::string& hash, Signature_Format& format)
{
if(algo_name == "RSA")
{
hash = deref_alias(get_string("x509/ca/rsa_hash"));
if(hash == "")
throw Invalid_State("No value set for x509/ca/rsa_hash");
padding = "EMSA3(" + hash + ")";
format = IEEE_1363;
}
else if(algo_name == "DSA")
{
hash = deref_alias("SHA-1");
padding = "EMSA1(" + hash + ")";
format = DER_SEQUENCE;
}
else
throw Invalid_Argument("Unknown X.509 signing key type: " + algo_name);
}
}
/*************************************************
* Add an alias for an algorithm *
*************************************************/
void add_alias(const std::string& alias, const std::string& official_name)
{
if(alias == "" || official_name == "")
return;
global_state().set_option("alias", alias, official_name);
}
/*************************************************
* Dereference an alias *
*************************************************/
std::string deref_alias(const std::string& name)
{
std::string result = name;
while(global_state().option_set("alias", result))
result = global_state().get_option("alias", result);
return result;
}
}
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