libcryfs/src/config/CryConfigConsole.cpp

#include "CryConfigConsole.h"
#include "CryCipher.h"

using cpputils::unique_ref;
using cpputils::Console;
using boost::optional;
using boost::none;
using std::string;
using std::vector;
using std::shared_ptr;

namespace cryfs {
    CryConfigConsole::CryConfigConsole(shared_ptr<Console> console)
            : _console(std::move(console)) {
    }

    string CryConfigConsole::askCipher() const {
        vector<string> ciphers = CryCiphers::supportedCipherNames();
        string cipherName = "";
        bool askAgain = true;
        while(askAgain) {
            _console->print("\n");
            int cipherIndex = _console->ask("Which block cipher do you want to use?", ciphers);
            cipherName = ciphers[cipherIndex];
            askAgain = !_showWarningForCipherAndReturnIfOk(cipherName);
        };
        return cipherName;
    }

    bool CryConfigConsole::_showWarningForCipherAndReturnIfOk(const string &cipherName) const {
        auto warning = CryCiphers::find(cipherName).warning();
        if (warning == none) {
            return true;
        }
        return _console->askYesNo(string() + (*warning) + " Do you want to take this cipher nevertheless?");
    }
}