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/*************************************************
* Configuration Handling Source File *
* (C) 1999-2005 The Botan Project *
*************************************************/
#include <botan/conf.h>
#include <botan/lookup.h>
#include <botan/mutex.h>
#include <botan/charset.h>
#include <botan/parsing.h>
#include <string>
#include <map>
namespace Botan {
namespace {
/*************************************************
* Holder for name-value option pairs *
*************************************************/
class Options
{
public:
std::string get(const std::string&);
void set(const std::string&, const std::string&, bool);
Options() { options_mutex = get_mutex(); }
~Options() { delete options_mutex; }
private:
std::map<std::string, std::string> options;
Mutex* options_mutex;
};
/*************************************************
* Get an option by name *
*************************************************/
std::string Options::get(const std::string& name)
{
Mutex_Holder lock(options_mutex);
std::map<std::string, std::string>::const_iterator i = options.find(name);
if(i != options.end())
return i->second;
return "";
}
/*************************************************
* Set an option by name *
*************************************************/
void Options::set(const std::string& name, const std::string& value,
bool overwrite)
{
const bool have_it = ((get(name) == "") ? false : true);
Mutex_Holder lock(options_mutex);
if(overwrite || !have_it)
options[name] = value;
}
/*************************************************
* Global state *
*************************************************/
Options* options = 0;
}
namespace Init {
/*************************************************
* Startup the configuration system *
*************************************************/
void startup_conf()
{
options = new Options;
}
/*************************************************
* Shutdown the configuration system *
*************************************************/
void shutdown_conf()
{
delete options;
options = 0;
}
}
namespace Config {
/*************************************************
* Set an option *
*************************************************/
void set(const std::string& name, const std::string& value, bool overwrite)
{
if(!options)
throw Internal_Error("Config::set: Conf system never started");
options->set(name, value, overwrite);
}
/*************************************************
* Get the value of an option as a string *
*************************************************/
std::string get_string(const std::string& name)
{
if(!options)
throw Internal_Error("Config::get: Conf system never started");
return options->get(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);
}
}
}
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