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auth.hpp
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auth.hpp
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/*
* Simple, lightweight and safe client-server authentication system.
* Copyright (c) 2009-2014 Mario 'rlyeh' Rodriguez
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* - Neither the name of Joachim Henke nor the names of his contributors may
* be used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
* - rlyeh ~~ listening to Owl Oxidant / My name is William Blake
*/
#pragma once
#include <stdio.h>
#include <string>
#include <vector>
namespace auth
{
namespace provider {
std::string salt();
std::string hash( const std::string &text );
unsigned long long now();
unsigned long long expire_time();
};
class session
{
bool valid = 0;
size_t timestamp = 0;
std::string user, pass, id, public_key, passphrase;
public:
session() {
set_public_key( std::string() );
}
explicit
session( const std::string &name, const std::string &pass, const std::string &context = std::string(), const std::string &public_key = std::string() ) {
setup( name, pass, context, public_key );
}
void setup( const std::string &name, const std::string &pass, const std::string &context = std::string(), const std::string &public_key = std::string() ) {
this->user = name;
this->id = user + ';' + context;
this->pass = provider::hash( pass );
set_public_key( public_key.empty() ? provider::salt() : public_key );
}
void touch() {
timestamp = provider::now();
}
bool is_timedout() const {
return( provider::now() > timestamp + provider::expire_time() );
}
bool is_valid() const {
return valid;
}
void invalidate() {
valid = false;
}
void reset() {
valid = true;
passphrase = public_key;
mutate();
}
void mutate() {
touch();
passphrase = provider::hash( passphrase + pass );
}
std::string get_user_id() const {
return id;
}
std::string get_user_name() const {
return user;
}
std::string get_passphrase() const {
return passphrase;
}
std::string next_passphrase() {
mutate();
return passphrase;
}
void set_public_key( const std::string &public_key ) {
// we *must* reset after setting a new public key.
this->public_key = public_key;
reset();
}
std::string get_public_key() {
return public_key;
}
size_t get_timestamp() {
return timestamp;
}
template<class T>
friend inline T& operator <<( T &ostream, const session &self ) {
return ostream <<
"[session:" << &self << "] {" << "\n" <<
".valid=" << self.valid << "\n" <<
".timestamp=" << self.timestamp << "\n" <<
".id=" << self.id << "\n" <<
".user=" << self.user << "\n" <<
".pass=" << self.pass << "\n" <<
".public_key=" << self.public_key << "\n" <<
".passphrase=" << self.passphrase << "\n" <<
"}" << "\n", ostream;
}
bool operator<( const session &other ) const {
return id < other.id;
}
bool operator==( const session &other ) const {
return user == other.user
&& public_key == other.public_key
&& passphrase == other.passphrase
&& valid == other.valid;
}
bool operator!=( const session &other ) const {
return !operator==( other );
}
};
}