haraldwolff
/
collabora-online
mirror of https://github.com/CollaboraOnline/online.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity
collabora-online/wsd/Auth.cpp

274 lines
9.5 KiB
C++
Raw Permalink Blame History

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
/*
* Copyright the Collabora Online contributors.
*
* SPDX-License-Identifier: MPL-2.0
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
#include <config.h>
#include "Auth.hpp"
#include <cstdlib>
#include <string>
#include <Poco/Base64Decoder.h>
#include <Poco/Base64Encoder.h>
#include <Poco/Crypto/RSADigestEngine.h>
#include <Poco/Crypto/RSAKey.h>
#include <Poco/Dynamic/Var.h>
#include <Poco/LineEndingConverter.h>
#include <Poco/Net/HTTPClientSession.h>
#include <Poco/Net/HTTPRequest.h>
#include <Poco/Net/HTTPResponse.h>
#include <Poco/Net/NetException.h>
#include <Poco/URI.h>
#include <Log.hpp>
#include <JsonUtil.hpp>
#include <Util.hpp>
#include <Protocol.hpp>
#include "COOLWSD.hpp"
using Poco::Base64Decoder;
using Poco::Base64Encoder;
using Poco::OutputLineEndingConverter;
std::unique_ptr<Poco::Crypto::RSAKey> JWTAuth::_key(
new Poco::Crypto::RSAKey(Poco::Crypto::RSAKey(Poco::Crypto::RSAKey::KL_2048, Poco::Crypto::RSAKey::EXP_LARGE)));
// avoid obscure double frees on exit.
void JWTAuth::cleanup()
{
_key.reset();
}
const std::string JWTAuth::getAccessToken()
{
std::string encodedHeader = createHeader();
std::string encodedPayload = createPayload();
// trim '=' from end of encoded header
encodedHeader.erase(std::find_if(encodedHeader.rbegin(), encodedHeader.rend(),
[](char& ch)->bool {return ch != '='; }).base(), encodedHeader.end());
// trim '=' from end of encoded payload
encodedPayload.erase(std::find_if(encodedPayload.rbegin(), encodedPayload.rend(),
[](char& ch)->bool { return ch != '='; }).base(), encodedPayload.end());
LOG_INF("Encoded JWT header: " << encodedHeader);
LOG_INF("Encoded JWT payload: " << encodedPayload);
// Convert to a URL and filename safe variant:
// Replace '+' with '-' && '/' with '_'
std::replace(encodedHeader.begin(), encodedHeader.end(), '+', '-');
std::replace(encodedHeader.begin(), encodedHeader.end(), '/', '_');
std::replace(encodedPayload.begin(), encodedPayload.end(), '+', '-');
std::replace(encodedPayload.begin(), encodedPayload.end(), '/', '_');
const std::string encodedBody = encodedHeader + '.' + encodedPayload;
// sign the encoded body
_digestEngine.update(encodedBody.c_str(), static_cast<unsigned>(encodedBody.length()));
Poco::Crypto::DigestEngine::Digest digest = _digestEngine.signature();
// The signature generated contains CRLF line endings.
// Use a line ending converter to remove these CRLF
std::ostringstream ostr;
OutputLineEndingConverter lineEndingConv(ostr, "");
Base64Encoder encoder(lineEndingConv);
encoder << std::string(digest.begin(), digest.end());
encoder.close();
std::string encodedSig = ostr.str();
// trim '=' from end of encoded signature
encodedSig.erase(std::find_if(encodedSig.rbegin(), encodedSig.rend(),
[](char& ch)->bool { return ch != '='; }).base(), encodedSig.end());
// Be URL and filename safe
std::replace(encodedSig.begin(), encodedSig.end(), '+', '-');
std::replace(encodedSig.begin(), encodedSig.end(), '/', '_');
LOG_INF("Sig generated is : " << encodedSig);
const std::string jwtToken = encodedBody + '.' + encodedSig;
LOG_INF("JWT token generated: " << jwtToken);
return jwtToken;
}
bool JWTAuth::verify(const std::string& accessToken)
{
StringVector tokens(StringVector::tokenize(accessToken, '.'));
try
{
if (tokens.size() < 3)
{
LOG_ERR("JWTAuth: verification failed; Not enough tokens");
return false;
}
const std::string encodedBody = tokens[0] + '.' + tokens[1];
_digestEngine.update(encodedBody.c_str(), static_cast<unsigned>(encodedBody.length()));
Poco::Crypto::DigestEngine::Digest digest = _digestEngine.signature();
std::ostringstream ostr;
OutputLineEndingConverter lineEndingConv(ostr, "");
Base64Encoder encoder(lineEndingConv);
encoder << std::string(digest.begin(), digest.end());
encoder.close();
std::string encodedSig = ostr.str();
// trim '=' from end of encoded signature.
encodedSig.erase(std::find_if(encodedSig.rbegin(), encodedSig.rend(),
[](char& ch)->bool { return ch != '='; }).base(), encodedSig.end());
// Make the encoded sig URL and filename safe
std::replace(encodedSig.begin(), encodedSig.end(), '+', '-');
std::replace(encodedSig.begin(), encodedSig.end(), '/', '_');
if (encodedSig != tokens[2])
{
LOG_ERR("JWTAuth: verification failed; Expected: " << encodedSig << ", Received: " << tokens[2]);
if (!Util::isFuzzing())
{
return false;
}
}
std::istringstream istr(tokens[1]);
std::string decodedPayload;
Base64Decoder decoder(istr);
decoder >> decodedPayload;
LOG_INF("JWTAuth:verify: decoded payload: " << decodedPayload);
// Verify if the token is not already expired
Poco::JSON::Parser parser;
Poco::Dynamic::Var result = parser.parse(decodedPayload);
Poco::JSON::Object::Ptr object = result.extract<Poco::JSON::Object::Ptr>();
std::time_t decodedExptime = 0;
object->get("exp").convert(decodedExptime);
std::chrono::system_clock::time_point now = std::chrono::system_clock::now();
std::time_t curtime = std::chrono::system_clock::to_time_t(now);
LOG_TRC("JWT: cur time " << curtime << " vs. " << decodedExptime);
if (curtime > decodedExptime)
{
LOG_INF("JWTAuth:verify: JWT expired; curtime:" << curtime << ", exp:" << decodedExptime);
if (!Util::isFuzzing())
{
return false;
}
}
}
catch(Poco::Exception& exc)
{
LOG_ERR("JWTAuth:verify: Exception: " << exc.displayText());
return false;
}
return true;
}
const std::string JWTAuth::createHeader()
{
// TODO: Some sane code to represent JSON objects
const std::string header = "{\"alg\":\"" + _alg + "\",\"typ\":\"" + _typ + "\"}";
LOG_INF("JWT Header: " << header);
std::ostringstream ostr;
OutputLineEndingConverter lineEndingConv(ostr, "");
Base64Encoder encoder(lineEndingConv);
encoder << header;
encoder.close();
return ostr.str();
}
const std::string JWTAuth::createPayload()
{
std::chrono::system_clock::time_point now = std::chrono::system_clock::now();
std::time_t curtime = std::chrono::system_clock::to_time_t(now);
int expirySeconds = COOLWSD::getConfigValue<int>("security.jwt_expiry_secs", 1800);
const std::string exptime = std::to_string(curtime + expirySeconds);
// TODO: Some sane code to represent JSON objects
const std::string payload = "{\"iss\":\"" + _iss + "\",\"sub\":\"" + _sub
+ "\",\"aud\":\"" + _aud + "\",\"nme\":\"" + _name
+ "\",\"exp\":\"" + exptime + "\"}";
LOG_INF("JWT Payload: " << payload << " expires in " << expirySeconds << "seconds");
std::ostringstream ostr;
OutputLineEndingConverter lineEndingConv(ostr, "");
Base64Encoder encoder(lineEndingConv);
encoder << payload;
encoder.close();
return ostr.str();
}
//TODO: This MUST be done over TLS to protect the token.
const std::string OAuth::getAccessToken()
{
const std::string url = _tokenEndPoint
+ "?client_id=" + _clientId
+ "&client_secret=" + _clientSecret
+ "&grant_type=authorization_code"
+ "&code=" + _authorizationCode;
// + "&redirect_uri="
Poco::URI uri(url);
Poco::Net::HTTPClientSession session(uri.getHost(), uri.getPort());
Poco::Net::HTTPRequest request(Poco::Net::HTTPRequest::HTTP_POST, url, Poco::Net::HTTPMessage::HTTP_1_1);
Poco::Net::HTTPResponse response;
session.sendRequest(request);
std::istream& rs = session.receiveResponse(response);
LOG_INF("Status: " << response.getStatus() << ' ' << response.getReason());
const std::string reply(std::istreambuf_iterator<char>(rs), {});
LOG_INF("Response: " << reply);
//TODO: Parse the token.
return std::string();
}
bool OAuth::verify(const std::string& token)
{
const std::string url = _authVerifyUrl + token;
LOG_DBG("Verifying authorization token from: " << url);
Poco::URI uri(url);
Poco::Net::HTTPClientSession session(uri.getHost(), uri.getPort());
Poco::Net::HTTPRequest request(Poco::Net::HTTPRequest::HTTP_GET, url, Poco::Net::HTTPMessage::HTTP_1_1);
Poco::Net::HTTPResponse response;
session.sendRequest(request);
std::istream& rs = session.receiveResponse(response);
LOG_INF("Status: " << response.getStatus() << ' ' << response.getReason());
const std::string reply(std::istreambuf_iterator<char>(rs), {});
LOG_INF("Response: " << reply);
//TODO: Parse the response.
/*
// This is used for the demo site.
const auto lastLogTime = std::strtoul(reply.c_str(), nullptr, 0);
if (lastLogTime < 1)
{
//TODO: Redirect to login page.
return;
}
*/
return true;
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
Reference in New Issue View Git Blame Copy Permalink