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/*************************************************
* Configuration Handling Source File *
* (C) 1999-2006 The Botan Project *
*************************************************/
#include <botan/config.h>
#include <botan/libstate.h>
#include <botan/lookup.h>
#include <botan/charset.h>
#include <botan/parsing.h>
#include <botan/stl_util.h>
#include <botan/mutex.h>
#include <string>
namespace Botan {
/*************************************************
* Get the global configuration object *
*************************************************/
Config& global_config()
{
return global_state().config();
}
/*************************************************
* Get a configuration value *
*************************************************/
std::string Config::get(const std::string& section,
const std::string& key) const
{
Named_Mutex_Holder lock("config");
return search_map<std::string, std::string>(settings,
section + "/" + key, "");
}
/*************************************************
* See if a particular option has been set *
*************************************************/
bool Config::is_set(const std::string& section,
const std::string& key) const
{
Named_Mutex_Holder lock("config");
return search_map(settings, section + "/" + key, false, true);
}
/*************************************************
* Set a configuration value *
*************************************************/
void Config::set(const std::string& section, const std::string& key,
const std::string& value, bool overwrite)
{
Named_Mutex_Holder lock("config");
std::string full_key = section + "/" + key;
std::map<std::string, std::string>::const_iterator i =
settings.find(full_key);
if(overwrite || i == settings.end() || i->second == "")
settings[full_key] = value;
}
/*************************************************
* Dereference an alias to a fixed name *
*************************************************/
std::string Config::deref_alias(const std::string& key) const
{
std::string result = key;
while(is_set("alias", result))
result = get("alias", result);
return result;
}
/*************************************************
* Get an option value *
*************************************************/
std::string Config::option(const std::string& key) const
{
return get("option", key);
}
/*************************************************
* Get the config setting as a list of strings *
*************************************************/
std::vector<std::string> Config::option_as_list(const std::string& key) const
{
return split_on(option(key), ':');
}
/*************************************************
* Get the config setting as a u32bit *
*************************************************/
u32bit Config::option_as_u32bit(const std::string& key) const
{
return parse_expr(option(key));
}
/*************************************************
* Get the config setting as a time *
*************************************************/
u32bit Config::option_as_time(const std::string& key) const
{
const std::string timespec = option(key);
if(timespec == "")
return 0;
const char suffix = timespec[timespec.size()-1];
std::string value = timespec.substr(0, timespec.size()-1);
u32bit scale = 1;
if(Charset::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::option_as_time: Unknown time value " + value
);
return scale * to_u32bit(value);
}
/*************************************************
* Get the config setting as a boolean *
*************************************************/
bool Config::option_as_bool(const std::string& key) const
{
const std::string value = option(key);
if(value == "0" || value == "false")
return false;
if(value == "1" || value == "true")
return true;
throw Decoding_Error(
"Config::option_as_bool: Unknown boolean value " + value
);
}
/*************************************************
* Choose the signature format for a PK algorithm *
*************************************************/
void Config::choose_sig_format(const std::string& algo_name,
std::string& padding,
Signature_Format& format)
{
if(algo_name == "RSA")
{
std::string hash = global_state().config().option("x509/ca/rsa_hash");
if(hash == "")
throw Invalid_State("No value set for x509/ca/rsa_hash");
hash = global_state().config().deref_alias(hash);
padding = "EMSA3(" + hash + ")";
format = IEEE_1363;
}
else if(algo_name == "DSA")
{
std::string hash = global_state().config().deref_alias("SHA-1");
padding = "EMSA1(" + hash + ")";
format = DER_SEQUENCE;
}
else
throw Invalid_Argument("Unknown X.509 signing key type: " + algo_name);
}
/*************************************************
* Dereference an alias *
*************************************************/
std::string deref_alias(const std::string& name)
{
return global_config().deref_alias(name);
}
}
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