84 lines
3.3 KiB
C++
84 lines
3.3 KiB
C++
#pragma once
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#include <tl/expected.hpp>
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#include <rublon/authentication_step_interface.hpp>
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#include <rublon/pam.hpp>
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#include <rublon/pam_action.hpp>
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namespace rublon::method {
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class PasscodeBasedAuth : public AuthenticationStep< PasscodeBasedAuth > {
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using base_t = AuthenticationStep< PasscodeBasedAuth >;
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const char * uri = "/api/transaction/confirmCode";
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const char * userMessage{nullptr};
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constexpr static bool isdigit(char ch) {
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return std::isdigit(static_cast< unsigned char >(ch));
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}
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static bool hasDigitsOnly(const std::string & userinput) {
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return std::all_of(userinput.cbegin(), userinput.cend(), isdigit);
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}
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static bool isProperLength(const std::string & userInput) {
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return userInput.size() == 6;
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}
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template < typename PamInfo_t = LinuxPam >
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tl::expected< std::reference_wrapper< Document >, Error > readPasscode(Document & body, const PamInfo_t & pam) const {
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auto & alloc = body.GetAllocator();
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auto vericode = pam.scan([](const char * userInput) { return std::string{userInput}; }, userMessage);
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if(isProperLength(vericode) and hasDigitsOnly(vericode)) {
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body.AddMember("vericode", Value{vericode.c_str(), alloc}, alloc);
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return body;
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}
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return tl::unexpected{Error{WerificationError{WerificationError::WrongCode}}};
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}
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template < typename PamInfo_t = LinuxPam >
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tl::expected< std::reference_wrapper< Document >, Error > askForPasscodeAgain(Document & body, const PamInfo_t & pam) const {
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pam.print("passcode has wrong number of digits or illegal characters, please correct");
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return readPasscode(body, pam);
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}
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tl::expected< AuthenticationStatus, Error > checkAuthenticationStatus(const Document & coreResponse) const {
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RapidJSONPMRStackAlloc< 1024 > alloc;
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auto error = JSONPointer{"/result/error", &alloc}.Get(coreResponse);
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if(error) {
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return tl::unexpected{Error{WerificationError{WerificationError::WrongCode}}};
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}
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return AuthenticationStatus{AuthenticationStatus::Action::Confirmed};
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}
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public:
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const char * name;
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PasscodeBasedAuth(std::string systemToken, std::string tid, const char * name, const char * userMessage)
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: base_t(std::move(systemToken), std::move(tid)), userMessage{userMessage}, name{name} {}
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template < typename Hander_t, typename PamInfo_t = LinuxPam >
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tl::expected< AuthenticationStatus, Error > handle(const CoreHandlerInterface< Hander_t > & coreHandler, const PamInfo_t & pam) const {
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RapidJSONPMRStackAlloc< 1024 > alloc{};
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Document body{rapidjson::kObjectType, &alloc};
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const auto checkAuthenticationStatus = [this](const auto & coreResponse) { return this->checkAuthenticationStatus(coreResponse); };
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const auto requestAuthorization = [&](const auto & body) { return coreHandler.request(alloc, uri, body); };
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const auto askForPasscodeAgain = [&](const auto & /*error*/) { return this->askForPasscodeAgain(body, pam); };
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this->addSystemToken(body);
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this->addTid(body);
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return readPasscode(body, pam) //
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.or_else(askForPasscodeAgain)
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.and_then(requestAuthorization)
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.and_then(checkAuthenticationStatus);
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}
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};
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} // namespace rublon::method
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