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ohcredentials.cxx    679 lines (617 with data), 23.4 kB

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/* Copyright (C) 2018 J.F.Dockes
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the
* Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "ohcredentials.hxx"
#include <upnp/upnp.h>
#include <sys/stat.h>
#include <functional>
#include <iostream>
#include <map>
#include <utility>
#include <vector>
#include <regex>
#include <sstream>
#include "conftree.h"
#include "main.hxx"
#include "smallut.h"
#include "pathut.h"
#include "execmd.h"
#include "sysvshm.h"
#include "mediaserver/cdplugins/cmdtalk.h"
#include "libupnpp/log.hxx"
#include "libupnpp/base64.hxx"
#include "libupnpp/soaphelp.hxx"
#include "libupnpp/device/device.hxx"
#include "mediaserver/cdplugins/cdplugin.hxx"
#include "mediaserver/cdplugins/plgwithslave.hxx"
using namespace std;
using namespace std::placeholders;
const size_t ohcreds_segsize{3000};
const int ohcreds_segid{923102018};
const char *ohcreds_segpath = "/etc/upmpdcli.conf";
static const string sTpCredentials("urn:av-openhome-org:service:Credentials:1");
static const string sIdCredentials("urn:av-openhome-org:serviceId:Credentials");
static const string idstring{"tidalhifi.com qobuz.com"};
static const map<string, string> idmap {
{"tidalhifi.com", "tidal"},
{"qobuz.com", "qobuz"}
};
// This is used for translating urls for the special use of
// Kazoo/Lumin. The media server, which is used to run the http server
// and for getting the real media URLs, must run on this host (for one
// thing the creds are passed through a local file).
// *** Note that this needs xxxautostart to work, else the HTTP server
// won't be listening (as long as nobody accesses the app section
// of the media server) ***
static string upnphost;
// Called from OHPlaylist. The CP (Kazoo/Lumin mostly) will send URIs
// like qobuz:// tidal:// and expect the renderer to know what to do
// with them. We transform them so that they point to our media server
// gateway (which should be running of course for this to work).
bool OHCredsMaybeMorphSpecialUri(string& uri, bool& isStreaming)
{
isStreaming = false;
if (uri.find("http://") == 0 || uri.find("https://") == 0) {
return true;
}
// Possibly retrieve the IP port used by our proxy server
static string sport;
if (sport.empty()) {
sport = SoapHelp::i2s(CDPluginServices::microhttpport());
}
// http://wiki.openhome.org/wiki/Av:Developer:Eriskay:StreamingServices
// Tidal and qobuz tracks added by Kazoo / Lumin:
// tidal://track?version=1&trackId=[tidal_track_id]
// qobuz://track?version=2&trackId=[qobuz_track_id]
string se =
"(tidal|qobuz)://track\\?version=([[:digit:]]+)&trackId=([[:digit:]]+)";
std::regex e(se);
std::smatch mr;
bool found = std::regex_match(uri, mr, e);
if (found) {
string pathprefix = CDPluginServices::getpathprefix(mr[1]);
// The microhttpd code actually only cares about getting a
// trackId parameter. Make it look what the plugins normally
// generate anyway:
string path = path_cat(pathprefix,
"track?version=1&trackId=" + mr[3].str());
uri = string("http://") + upnphost + ":" + sport + path;
isStreaming = true;
}
return found;
}
// We might want to derive this into ServiceCredsQobuz,
// ServiceCredsTidal, there is a lot in common and a few diffs.
struct ServiceCreds {
ServiceCreds() {}
ServiceCreds(const string& inm, const string& u, const string& p,
const string& ep)
: servicename(inm), user(u), password(p), encryptedpass(ep) {
if (servicename == "qobuz") {
// The appid used by the Qobuz python module. Has to be
// consistent with the token obtained by the same, so we
// return it (by convention, as seen in wiresharking
// kazoo) in the data field. We could and do obtain the
// appid from the module, but kazoo apparently wants it
// before we login, so just hard-code it for now. The
// Python code uses the value from XBMC,285473059,
// ohplayer uses 854233864
data = "285473059";
} else if (servicename == "tidal") {
// data contains the country code
data = "FR";
}
}
~ServiceCreds() {
delete cmd;
}
// We need a Python helper to perform the login. That's the media
// server gateway module, from which we only use a separate method
// which logs-in and returns the auth data (token, etc.)
bool maybeStartCmd() {
LOGDEB1("ServiceCreds: " << servicename << " maybeStartCmd()\n");
if (nullptr == cmd) {
cmd = new CmdTalk(30);
}
if (cmd->running()) {
return true;
}
LOGDEB("ServiceCreds: " << servicename << " starting cmd\n");
// hostport is not needed by this login-only instance.
return PlgWithSlave::startPluginCmd(
*cmd, servicename, "bogus", 0,
CDPluginServices::getpathprefix(servicename));
}
string login() {
LOGDEB("ServiceCreds: " << servicename << " login\n");
// Check if already logged-in
if (servicename == "qobuz" || servicename == "tidal") {
if (!servicedata["token"].empty()) {
return servicedata["token"];
}
} else {
LOGERR("Unsupported service: " << servicename << endl);
return string();
}
if (!maybeStartCmd()) {
return string();
}
unordered_map<string,string> res;
if (!cmd->callproc("login", {{"user", user},
{"password", password}}, res)) {
LOGERR("ServiceCreds::login: slave failure. Service " <<
servicename << " user " << user << endl);
return string();
}
vector<string> toknames;
if (servicename == "qobuz") {
toknames = vector<string>{"token", "appid"};
} else if (servicename == "tidal") {
toknames = vector<string>{"token", "country"};
}
for (const auto& toknm : toknames) {
auto it = res.find(toknm);
if (it == res.end()) {
LOGERR("ServiceCreds::login: no " << toknm << ". Service " <<
servicename << " user " << user << endl);
return string();
}
servicedata[toknm] = it->second;
}
// Start a silent/crippled media server process (if not
// already done) to perform the URL redirections. If the media
// server was actually enabled by one of the services, this
// will do nothing.
startMsOnlyProcess();
if (servicename == "qobuz") {
data = servicedata["appid"];
} else if (servicename == "tidal") {
data = servicedata["country"];
}
return servicedata["token"];
}
void logout() {
servicedata.clear();
}
string str() {
string s;
string sdata;
for (const auto& entry:servicedata) {
sdata += entry.first + " : " + entry.second + ", ";
}
s += "Service: " + servicename + " User: " + user +
/*" Pass: "+password*/ + " Servicedata: " + sdata +
/*" EPass: "+encryptedpass*/ + " Enabled: " +
SoapHelp::i2s(enabled) + " Status: " + status + " Data: " + data;
return s;
}
// Internal name, like "qobuz"
string servicename;
string user;
string password;
string encryptedpass;
bool enabled{true};
CmdTalk *cmd{0};
// Things we obtain from the module and send to the CP
unordered_map<string,string> servicedata;
string status;
// See comments about 'data' use above.
string data;
};
class OHCredentials::Internal {
public:
Internal(const string& cd) {
opensslcmd = "openssl";
g_config->get("opensslcmd", opensslcmd);
cachedir = path_cat(cd, "ohcreds");
if (!path_makepath(cachedir, 0700)) {
LOGERR("OHCredentials: can't create cache dir " << cachedir <<endl);
return;
}
keyfile = path_cat(cachedir, "credkey.pem");
cmd.putenv("RANDFILE", path_cat(cachedir, "randfile"));
if (!path_exists(keyfile)) {
vector<string> acmd{opensslcmd, "genrsa", "-out", keyfile, "4096"};
int status = cmd.doexec1(acmd);
chmod(keyfile.c_str(), 0600);
if (status != 0) {
LOGERR("OHCredentials: could not create key\n");
return;
}
}
// It seems that some CPs (e.g. bubble upnp, but not kazoo)
// expect the key in pkcs#1 format, but the default openssl
// pkey format is pkcs#12. Explanations about the formats:
// https://stackoverflow.com/questions/18039401/how-can-i-transform
//-between-the-two-styles-of-public-key-format-one-begin-rsa#29707204
// So use the openssl rsa command with the appropriate option
// instead of openssl pkey
// vector<string> acmd{opensslcmd, "pkey", "-in", keyfile, "-pubout"};
vector<string> acmd{opensslcmd,"rsa","-in",keyfile, "-RSAPublicKey_out"};
if (!cmd.backtick(acmd, pubkey)) {
LOGERR("OHCredentials: could not read public key\n");
return;
}
LOGDEB1("OHCredentials: my public key:\n" << pubkey << endl);
tryLoad();
}
bool decrypt(const string& in, string& out) {
vector<string> acmd{opensslcmd, "pkeyutl", "-inkey",
keyfile, "-pkeyopt", "rsa_padding_mode:oaep", "-decrypt"};
int status = cmd.doexec1(acmd, &in, &out);
if (status) {
LOGERR("OHCredentials: decrypt failed\n");
return false;
}
//LOGDEB1("decrypt: [" << out << "]\n");
return true;
}
bool setEnabled(const string& id, bool enabled) {
auto it = creds.find(id);
if (it == creds.end()) {
return false;
}
it->second.enabled = enabled;
return true;
}
bool save() {
bool saveohcredentials = doingsavetofile();
// The media server process needs the credentials for
// translating the permanent URL into the actual media stream
// ones. We can use either a shared memory segment or a file
// for this purpose.
//
// Using a file offers less security (the creds are available
// to anyone with physical access to the device), but they can
// then also be used by the regular Media Server plugin,
// allowing access by a non-ohcredentials CP (e.g. upplay)
// without having to set them in upmpdcli.conf. In other
// words, the Credentials service utility is extended to
// regular CPs.
//
// The choice between shmem/file is decided by the
// saveohcredentials configuration variable
if (saveohcredentials) {
string credsfile = path_cat(cachedir, "screds");
ConfSimple credsconf(credsfile.c_str());
if (!credsconf.ok()) {
LOGERR("OHCredentials: error opening " << credsfile <<
" errno " << errno << endl);
return false;
}
saveToConfTree(credsconf);
chmod(credsfile.c_str(), 0600);
} else {
string data;
ConfSimple credsconf(data);
saveToConfTree(credsconf);
LockableShmSeg seg(ohcreds_segpath, ohcreds_segid, ohcreds_segsize,
true);
if (!seg.ok()) {
LOGERR("OHCredentials: shared memory segment allocate/attach "
"failed\n");
return false;
}
LockableShmSeg::Accessor access(seg);
char *cp = (char *)(access.getseg());
ostringstream strm;
credsconf.write(strm);
if (strm.str().size() >= ohcreds_segsize - 1) {
LOGERR("OHCredentials: creds size " << strm.str().size() <<
"won't fit in SHM segment\n");
return false;
}
strncpy(cp, strm.str().c_str(), ohcreds_segsize);
LOGDEB1("OHCredentials: shm seg content: [" << cp << "]\n");
}
return true;
}
//// This could be a private part if we were not all friends here /////
bool doingsavetofile() {
bool saveohcredentials = true;
string val;
if (g_config && g_config->get("saveohcredentials", val)) {
saveohcredentials = stringToBool(val);
}
return saveohcredentials;
}
void saveToConfTree(ConfSimple& credsconf) {
for (const auto& cred : creds) {
const string& shortid = cred.second.servicename;
credsconf.set(shortid + "user", cred.second.user);
credsconf.set(shortid + "pass", cred.second.password);
// Saving the encrypted version is redundant, but it
// avoids having to run encrypt on load.
credsconf.set(shortid + "epass", cred.second.encryptedpass);
}
}
// Try to load from configuration file at startup. Avoids having
// to enter the password on the CP if it was previously saved.
void tryLoad() {
if (!doingsavetofile()) {
return;
}
string credsfile = path_cat(cachedir, "screds");
ConfSimple credsconf(credsfile.c_str(), 1);
if (!credsconf.ok()) {
LOGDEB("OHCredentials: error opening for read (probably not an "
"error)" << credsfile << " errno " << errno << endl);
return;
}
for (const auto& service : idmap) {
const string& id = service.first;
const string& shortid = service.second;
string user, pass, epass;
if (credsconf.get(shortid + "user", user) &&
credsconf.get(shortid + "pass", pass) &&
credsconf.get(shortid + "epass", epass)) {
LOGDEB("OHCreds: using saved creds for " << id << endl);
creds[id] = ServiceCreds(shortid, user, pass, epass);
}
}
}
string opensslcmd;
ExecCmd cmd;
string cachedir;
string keyfile;
string pubkey;
int seq{1};
map<string, ServiceCreds> creds;
};
OHCredentials::OHCredentials(UpMpd *dev, const string& cachedir)
: OHService(sTpCredentials, sIdCredentials, "OHCredentials.xml", dev),
m(new Internal(cachedir))
{
dev->addActionMapping(
this, "Set",
bind(&OHCredentials::actSet, this, _1, _2));
dev->addActionMapping(
this, "Clear",
bind(&OHCredentials::actClear, this, _1, _2));
dev->addActionMapping(
this, "SetEnabled",
bind(&OHCredentials::actSetEnabled, this, _1, _2));
dev->addActionMapping(
this, "Get",
bind(&OHCredentials::actGet, this, _1, _2));
dev->addActionMapping(
this, "Login",
bind(&OHCredentials::actLogin, this, _1, _2));
dev->addActionMapping(
this, "ReLogin",
bind(&OHCredentials::actReLogin, this, _1, _2));
dev->addActionMapping(
this, "GetIds",
bind(&OHCredentials::actGetIds, this, _1, _2));
dev->addActionMapping(
this, "GetPublicKey",
bind(&OHCredentials::actGetPublicKey, this, _1, _2));
dev->addActionMapping(
this, "GetSequenceNumber",
bind(&OHCredentials::actGetSequenceNumber, this, _1, _2));
unsigned short usport;
dev->ipv4(&upnphost, &usport);
}
OHCredentials::~OHCredentials()
{
delete m;
}
bool OHCredentials::makestate(unordered_map<string, string> &st)
{
st.clear();
if (nullptr == m) {
return false;
}
st["Ids"] = idstring;
st["PublicKey"] = m->pubkey;
st["SequenceNumber"] = SoapHelp::i2s(m->seq);
return true;
}
int OHCredentials::actSet(const SoapIncoming& sc, SoapOutgoing& data)
{
bool ok = false;
std::string in_Id;
ok = sc.get("Id", &in_Id);
if (!ok) {
LOGERR("OHCredentials::actSet: no Id in params\n");
return UPNP_E_INVALID_PARAM;
}
std::string in_UserName;
ok = sc.get("UserName", &in_UserName);
if (!ok) {
LOGERR("OHCredentials::actSet: no UserName in params\n");
return UPNP_E_INVALID_PARAM;
}
string in_Password;
ok = sc.get("Password", &in_Password);
if (!ok) {
LOGERR("OHCredentials::actSet: no Password in params\n");
return UPNP_E_INVALID_PARAM;
}
LOGDEB("OHCredentials::actSet: " << " Id " << in_Id << " UserName " <<
in_UserName << " Password " << in_Password << endl);
const auto it1 = idmap.find(in_Id);
if (it1 == idmap.end()) {
LOGERR("OHCredentials::actSet: bad service id [" << in_Id <<"]\n");
return UPNP_E_INVALID_PARAM;
}
string servicename = it1->second;
string cpass = base64_decode(in_Password);
string plainpass;
if (!m->decrypt(cpass, plainpass)) {
LOGERR("OHCredentials::actSet: could not decrypt\n");
return UPNP_E_INVALID_PARAM;
}
auto it = m->creds.find(in_Id);
if (it == m->creds.end() || it->second.user != in_UserName ||
it->second.password != plainpass ||
it->second.encryptedpass != in_Password) {
m->creds[in_Id] = ServiceCreds(servicename, in_UserName, plainpass,
in_Password);
}
m->seq++;
m->save();
if (m->setEnabled(in_Id, true)) {
return UPNP_E_SUCCESS;
} else {
return UPNP_E_INVALID_PARAM;
}
}
int OHCredentials::actLogin(const SoapIncoming& sc, SoapOutgoing& data)
{
bool ok = false;
std::string in_Id;
ok = sc.get("Id", &in_Id);
if (!ok) {
LOGERR("OHCredentials::actLogin: no Id in params\n");
return UPNP_E_INVALID_PARAM;
}
LOGDEB("OHCredentials::actLogin: " << " Id " << in_Id << endl);
auto it = m->creds.find(in_Id);
if (it == m->creds.end()) {
LOGERR("OHCredentials::Login: Id " << in_Id << " not found\n");
return UPNP_E_INVALID_PARAM;
}
string token = it->second.login();
LOGDEB("OHCredentials::Login: got token " << token << endl);
data.addarg("Token", token);
m->seq++;
return UPNP_E_SUCCESS;
}
int OHCredentials::actReLogin(const SoapIncoming& sc, SoapOutgoing& data)
{
bool ok = false;
std::string in_Id;
ok = sc.get("Id", &in_Id);
if (!ok) {
LOGERR("OHCredentials::actReLogin: no Id in params\n");
return UPNP_E_INVALID_PARAM;
}
std::string in_CurrentToken;
ok = sc.get("CurrentToken", &in_CurrentToken);
if (!ok) {
LOGERR("OHCredentials::actReLogin: no CurrentToken in params\n");
return UPNP_E_INVALID_PARAM;
}
LOGDEB("OHCredentials::actReLogin: " << " Id " << in_Id << " CurrentToken "
<< in_CurrentToken << endl);
auto it = m->creds.find(in_Id);
if (it == m->creds.end()) {
LOGERR("OHCredentials::Login: Id " << in_Id << " not found\n");
return UPNP_E_INVALID_PARAM;
}
it->second.logout();
string token = it->second.login();
data.addarg("NewToken", token);
m->seq++;
return UPNP_E_SUCCESS;
}
int OHCredentials::actClear(const SoapIncoming& sc, SoapOutgoing& data)
{
bool ok = false;
std::string in_Id;
ok = sc.get("Id", &in_Id);
if (!ok) {
LOGERR("OHCredentials::actClear: no Id in params\n");
return UPNP_E_INVALID_PARAM;
}
LOGDEB("OHCredentials::actClear: " << " Id " << in_Id << endl);
if (idmap.find(in_Id) == idmap.end()) {
LOGERR("OHCredentials::actClear: bad service id [" << in_Id <<"]\n");
return UPNP_E_INVALID_PARAM;
}
auto it = m->creds.find(in_Id);
if (it != m->creds.end()) {
m->creds.erase(it);
m->seq++;
}
return UPNP_E_SUCCESS;
}
int OHCredentials::actSetEnabled(const SoapIncoming& sc, SoapOutgoing& data)
{
bool ok = false;
std::string in_Id;
ok = sc.get("Id", &in_Id);
if (!ok) {
LOGERR("OHCredentials::actSetEnabled: no Id in params\n");
return UPNP_E_INVALID_PARAM;
}
bool in_Enabled;
ok = sc.get("Enabled", &in_Enabled);
if (!ok) {
LOGERR("OHCredentials::actSetEnabled: no Enabled in params\n");
return UPNP_E_INVALID_PARAM;
}
LOGDEB("OHCredentials::actSetEnabled: " << " Id " << in_Id << " Enabled " <<
in_Enabled << endl);
if (m->setEnabled(in_Id, in_Enabled)) {
m->seq++;
return UPNP_E_SUCCESS;
} else {
return UPNP_E_INVALID_PARAM;
}
}
int OHCredentials::actGet(const SoapIncoming& sc, SoapOutgoing& data)
{
bool ok = false;
std::string in_Id;
ok = sc.get("Id", &in_Id);
if (!ok) {
LOGERR("OHCredentials::actGet: no Id in params\n");
return UPNP_E_INVALID_PARAM;
}
LOGDEB("OHCredentials::actGet: " << " Id " << in_Id << endl);
auto it = m->creds.find(in_Id);
ServiceCreds emptycreds;
ServiceCreds *credsp(&emptycreds);
if (it != m->creds.end()) {
credsp = &(it->second);
} else {
LOGDEB("OHCredentials::actGet: nothing found for " << in_Id << endl);
}
LOGDEB("OHCredentials::actGet: data for " << in_Id << " " <<
credsp->str() << endl);
data.addarg("UserName", credsp->user);
// Encrypted password !
data.addarg("Password", credsp->encryptedpass);
// In theory enabled is set in response to setEnabled() or
// set(). In practise, if it is not set, we don't get to the qobuz
// settings screen in kazoo.
data.addarg("Enabled", credsp->enabled ? "1" : "1");
data.addarg("Status", credsp->status);
data.addarg("Data", credsp->data);
return UPNP_E_SUCCESS;
}
int OHCredentials::actGetIds(const SoapIncoming& sc, SoapOutgoing& data)
{
LOGDEB("OHCredentials::actGetIds: " << endl);
data.addarg("Ids", idstring);
return UPNP_E_SUCCESS;
}
int OHCredentials::actGetPublicKey(const SoapIncoming& sc, SoapOutgoing& data)
{
LOGDEB("OHCredentials::actGetPublicKey: pubkey: " << m->pubkey << endl);
data.addarg("PublicKey", m->pubkey);
return m->pubkey.empty() ? UPNP_E_INTERNAL_ERROR : UPNP_E_SUCCESS;
}
int OHCredentials::actGetSequenceNumber(const SoapIncoming& sc,
SoapOutgoing& data)
{
LOGDEB("OHCredentials::actGetSequenceNumber: " << endl);
data.addarg("SequenceNumber", SoapHelp::i2s(m->seq));
return UPNP_E_SUCCESS;
}