You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
78 lines
2.5 KiB
78 lines
2.5 KiB
#pragma once
|
|
|
|
#include <list>
|
|
#include <string>
|
|
#include <chrono>
|
|
#include <mutex>
|
|
#include <functional>
|
|
#include <pEp/message_api.h>
|
|
|
|
namespace pEp {
|
|
class PassphraseCache {
|
|
using clock = std::chrono::system_clock;
|
|
using time_point = std::chrono::time_point<clock>;
|
|
using duration = clock::duration;
|
|
|
|
struct cache_entry {
|
|
static const size_t max_len = 250 * 4;
|
|
cache_entry(std::string p, time_point t) :
|
|
passphrase(p, 0, max_len), tp(t) { }
|
|
|
|
std::string passphrase;
|
|
time_point tp;
|
|
};
|
|
using cache = std::list<cache_entry>;
|
|
|
|
cache _cache;
|
|
std::mutex _mtx;
|
|
int _max_size;
|
|
duration _timeout;
|
|
|
|
cache::iterator _which;
|
|
|
|
public:
|
|
PassphraseCache(int max_size=20, duration timeout =
|
|
std::chrono::minutes(10)) : _max_size(max_size),
|
|
_timeout(timeout), _which(_cache.end()) { }
|
|
~PassphraseCache() { }
|
|
PassphraseCache(const PassphraseCache& second) : _cache(second._cache),
|
|
_max_size(second._max_size), _timeout(second._timeout),
|
|
_which(_cache.end()) { }
|
|
PassphraseCache operator=(const PassphraseCache& second) { return second; }
|
|
|
|
// adding a passphrase to the cache, which will timeout
|
|
|
|
const char *add(std::string passphrase);
|
|
|
|
// for each passphrase call the callee until it returns true for a
|
|
// matching passphrase or no passphrases are left
|
|
// always tests empty passphrase first
|
|
// returns true if a passphrase was matching, false otherwise
|
|
|
|
using passphrase_callee = std::function<bool(std::string)>;
|
|
bool for_each_passphrase(const passphrase_callee& callee);
|
|
|
|
// get all passphrases in cache from latest to oldest
|
|
// this function is throwing std::underflow_error when no passphrases
|
|
// are left
|
|
|
|
std::string latest_passphrase();
|
|
|
|
// convenience functions
|
|
// i.e.
|
|
// status = cache.api(::encrypt_message, session, src, extra, dst, enc_format, flags)
|
|
// will call
|
|
// status = ::encrypt_message(session, src, extra, dst, enc_format, flags)
|
|
// using for_each_passphrase()
|
|
|
|
template<typename... A> PEP_STATUS api(PEP_STATUS f(PEP_SESSION, A...),
|
|
PEP_SESSION session, A... a);
|
|
|
|
protected:
|
|
void cleanup();
|
|
void refresh(cache::iterator entry);
|
|
};
|
|
};
|
|
|
|
#include "passphrase_cache.hxx"
|
|
|
|
|