/*
U2FDevice - A program to allow Raspberry Pi Zeros to act as U2F tokens
Copyright (C) 2018 Michael Kuc
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see .
*/
#include "Streams.hpp"
#include "Architecture.hpp"
#include "IO.hpp"
#include
#include
#include
#include
#include
#include
#include
#include
#include
using std::cerr;
using std::clog;
using std::endl;
using std::runtime_error;
using std::shared_ptr;
using std::string;
shared_ptr initialiseHostDescriptor();
#ifdef DEBUG_STREAMS
FILE* initHTML(FILE* fPtr, const string& title);
void closeHTML(FILE* fPtr);
#endif
shared_ptr getHostDescriptor() {
static shared_ptr descriptor{ initialiseHostDescriptor() };
return descriptor;
}
#ifdef DEBUG_STREAMS
shared_ptr getComHostStream() {
static shared_ptr stream{ fopen((cacheDirectory + "comhost.txt").c_str(), "wb"),
[](FILE* f) {
clog << "Closing comhost stream" << endl;
fclose(f);
} };
if (!stream)
clog << "Stream is unavailable" << endl;
return stream;
}
shared_ptr getHostPacketStream() {
static shared_ptr stream{
initHTML(fopen((cacheDirectory + "hostpackets.html").c_str(), "wb"), "Host Packets"),
[](FILE* f) {
clog << "Closing hostPackets stream" << endl;
closeHTML(f);
}
};
if (!stream)
clog << "Stream is unavailable" << endl;
return stream;
}
shared_ptr getHostAPDUStream() {
static shared_ptr stream{
initHTML(fopen((cacheDirectory + "hostAPDU.html").c_str(), "wb"), "Host APDU"),
[](FILE* f) {
clog << "Closing host APDU stream" << endl;
closeHTML(f);
}
};
if (!stream)
clog << "Stream is unavailable" << endl;
return stream;
}
shared_ptr getComDevStream() {
static shared_ptr stream{ fopen((cacheDirectory + "comdev.txt").c_str(), "wb"),
[](FILE* f) {
clog << "Closing comdev stream" << endl;
fclose(f);
} };
if (!stream)
clog << "Stream is unavailable" << endl;
return stream;
}
shared_ptr getDevPacketStream() {
static shared_ptr stream{
initHTML(fopen((cacheDirectory + "devpackets.html").c_str(), "wb"), "Dev Packets"),
[](FILE* f) {
clog << "Closing devPackets stream" << endl;
closeHTML(f);
}
};
if (!stream)
clog << "Stream is unavailable" << endl;
return stream;
}
shared_ptr getDevAPDUStream() {
static shared_ptr stream{ initHTML(fopen((cacheDirectory + "devAPDU.html").c_str(), "wb"),
"Dev APDU"),
[](FILE* f) {
clog << "Closing dev APDU stream" << endl;
closeHTML(f);
} };
if (!stream)
clog << "Stream is unavailable" << endl;
return stream;
}
FILE* initHTML(FILE* fPtr, const string& title) {
fprintf(fPtr,
"\n"
"\t\n"
"\t\t%s\n"
"\t\t\n"
"\t\n"
"\n"
"\t",
title.c_str());
return fPtr;
}
void closeHTML(FILE* fPtr) {
fprintf(fPtr, "\t\n"
"");
fclose(fPtr);
}
#endif
shared_ptr initialiseHostDescriptor() {
int descriptor;
#ifdef HID_SOCKET
if (access(clientSocket.c_str(), F_OK)) {
remove(clientSocket.c_str());
}
descriptor = socket(AF_UNIX, SOCK_SEQPACKET | SOCK_CLOEXEC, 0);
if (descriptor == -1)
throw runtime_error{ "Unable to open client socket" };
sockaddr_un serverSockAddr{}, clientSockAddr{};
clientSockAddr.sun_family = AF_UNIX;
strncpy(clientSockAddr.sun_path, clientSocket.c_str(), sizeof(clientSockAddr.sun_path) - 1);
// Attempt to remove existing
unlink(clientSocket.c_str());
int result = ::bind(descriptor, (sockaddr*)&clientSockAddr, sizeof(clientSockAddr));
if (result == -1)
throw runtime_error{ "Unable to bind to client socket: " + clientSocket };
serverSockAddr.sun_family = AF_UNIX;
strncpy(serverSockAddr.sun_path, HID_DEV, sizeof(serverSockAddr.sun_path) - 1);
for (size_t connectCount = 0; connectCount < 100; connectCount++) {
result = connect(descriptor, (sockaddr*)&serverSockAddr, sizeof(serverSockAddr));
if (result != -1)
break;
usleep(100'000);
}
if (result == -1)
throw runtime_error{ "Unable to connect to server socket: " + string{ HID_DEV } };
__android_log_print(ANDROID_LOG_DEBUG, "U2FDevice", "Connected to server");
return shared_ptr{ new int{ descriptor }, [](const int* fd) {
close(*fd);
remove(clientSocket.c_str());
delete fd;
} };
#else
descriptor = open(HID_DEV, O_RDWR | O_NONBLOCK | O_APPEND);
if (descriptor == -1)
throw runtime_error{ "Descriptor is unavailable" };
return shared_ptr{ new int{ descriptor }, [](const int* fd) {
close(*fd);
delete fd;
} };
#endif
}