238 lines
8.1 KiB
C
238 lines
8.1 KiB
C
/*
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* Treebird - Lightweight frontend for Pleroma
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* Copyright (C) 2022 Nekobit
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include <curl/curl.h>
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#include <fcgi_stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include "helpers.h"
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#include "query.h"
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#include "base_page.h"
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#include "login.h"
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#include "error.h"
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#include "easprintf.h"
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#include "../config.h"
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#include "http.h"
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// Files
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#include "../static/login.ctmpl"
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#define LOGIN_SCOPE "read+write+follow+push"
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void apply_access_token(FCGX_Request* req, char* token)
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{
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FCGX_FPrintF(req->out, "Set-Cookie: access_token=%s; Path=/; Max-Age=31536000\r\n", token);
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FCGX_FPrintF(req->out, "Set-Cookie: logged_in=t; Path=/; Max-Age=31536000\r\n");
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// if config_url_prefix is empty, make it root
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redirect(req, REDIRECT_303, config_url_prefix &&
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config_url_prefix[0] != '\0' ? config_url_prefix : "/");
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}
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void content_login_oauth(PATH_ARGS)
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{
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struct mstdnt_args m_args;
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set_mstdnt_args(&m_args, ssn);
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struct mstdnt_storage storage = { 0 }, oauth_storage = { 0 };
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struct mstdnt_app app;
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struct mstdnt_oauth_token token;
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const char* orig_url = m_args.url;
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char* redirect_url = getenv("SERVER_NAME");
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char* decode_url = NULL;
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char* urlify_redirect_url = NULL;
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easprintf(&urlify_redirect_url, "http%s://%s/login/oauth",
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config_host_url_insecure ? "" : "s",
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config_host_url ? config_host_url : redirect_url );
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if (keystr(ssn->query.code))
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{
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struct mstdnt_application_args args_token = {
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.grant_type = "authorization_code",
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.client_id = keystr(ssn->cookies.client_id),
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.client_secret = keystr(ssn->cookies.client_secret),
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.redirect_uri = urlify_redirect_url,
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.scope = LOGIN_SCOPE,
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.code = keystr(ssn->query.code),
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};
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if (mastodont_obtain_oauth_token(api,
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&m_args,
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&args_token,
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&oauth_storage,
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&token) == 0)
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{
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apply_access_token(req, token.access_token);
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}
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}
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else if (keystr(ssn->post.instance))
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{
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decode_url = curl_easy_unescape(api->curl, keystr(ssn->post.instance), 0, NULL);
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m_args.url = decode_url;
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struct mstdnt_application_args args_app = {
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.client_name = "DESU",
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.redirect_uris = urlify_redirect_url,
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.scopes = "read+write+follow+push",
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.website = keystr(ssn->post.instance)
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};
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if (mastodont_register_app(api,
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&m_args,
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&args_app,
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&storage,
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&app) == 0)
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{
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char* url;
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char* encode_id = curl_easy_escape(api->curl, app.client_id, 0);
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easprintf(&url, "%s/oauth/authorize?response_type=code&scope=" LOGIN_SCOPE "&client_id=%s&redirect_uri=%s",
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decode_url, encode_id, urlify_redirect_url);
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// Set cookie and redirect
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FCGX_FPrintF(req->out, "Set-Cookie: instance_url=%s; Path=/; Max-Age=3153600\r\n", decode_url);
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FCGX_FPrintF(req->out, "Set-Cookie: client_id=%s; Path=/; Max-Age=3153600\r\n", app.client_id);
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FCGX_FPrintF(req->out, "Set-Cookie: client_secret=%s; Path=/; Max-Age=3153600\r\n", app.client_secret);
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redirect(req, REDIRECT_303, url);
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free(url);
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curl_free(encode_id);
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}
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}
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m_args.url = orig_url;
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redirect(req, REDIRECT_303, config_url_prefix &&
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config_url_prefix[0] != '\0' ? config_url_prefix : "/");
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mastodont_storage_cleanup(&storage);
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mastodont_storage_cleanup(&oauth_storage);
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if (urlify_redirect_url) free(urlify_redirect_url);
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if (decode_url) curl_free(decode_url);
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}
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void content_login(PATH_ARGS)
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{
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struct mstdnt_args m_args;
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set_mstdnt_args(&m_args, ssn);
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struct mstdnt_storage storage = { 0 }, oauth_store = { 0 };
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struct mstdnt_app app;
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struct mstdnt_oauth_token token;
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char* error = NULL;
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char* page;
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if (keystr(ssn->post.username) && keystr(ssn->post.password))
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{
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// Getting the client id/secret
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struct mstdnt_application_args args_app = {
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.client_name = "Treebird",
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.redirect_uris = "http://localhost/",
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.scopes = LOGIN_SCOPE,
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.website = NULL
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};
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// Check if the username contains an @ symbol
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char* address = strstr(keystr(ssn->post.username), "%40");
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// If it fails, we need to restore
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const char* orig_url = m_args.url;
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char* url_link = NULL;
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if (address)
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{
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// Let is viewable as username
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*address = '\0';
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address += sizeof("%40")-1;
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easprintf(&url_link, "https://%s/", address);
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m_args.url = url_link;
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}
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else {
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// Reset to instance url
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m_args.url = config_instance_url;
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}
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if (mastodont_register_app(api, &m_args, &args_app, &storage, &app) != 0)
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{
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error = construct_error(oauth_store.error, E_ERROR, 1, NULL);
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}
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else {
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struct mstdnt_application_args args_token = {
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.grant_type = "password",
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.client_id = app.client_id,
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.client_secret = app.client_secret,
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.redirect_uri = NULL,
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.scope = LOGIN_SCOPE,
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.code = NULL,
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.username = keystr(ssn->post.username),
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.password = keystr(ssn->post.password)
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};
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if (mastodont_obtain_oauth_token(api,
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&m_args,
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&args_token,
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&oauth_store,
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&token) != 0 && oauth_store.error)
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{
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error = construct_error(oauth_store.error, E_ERROR, 1, NULL);
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}
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else {
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if (url_link)
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FCGX_FPrintF(req->out, "Set-Cookie: instance_url=%s; Path=/; Max-Age=31536000\r\n", url_link);
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else
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// Clear
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FCGX_FPrintF(req->out, "Set-Cookie: instance_url=; Path=/; Max-Age=-1\r\n");
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apply_access_token(req, token.access_token);
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free(url_link);
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return;
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}
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}
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if (url_link)
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{
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// Restore and cleanup, an error occured
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m_args.url = orig_url;
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free(url_link);
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}
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}
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// Concat
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struct login_template tdata = {
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.login_header = L10N[L10N_EN_US][L10N_LOGIN],
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.error = error,
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.prefix = config_url_prefix,
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.username = L10N[L10N_EN_US][L10N_USERNAME],
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.password = L10N[L10N_EN_US][L10N_PASSWORD],
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.login_submit = L10N[L10N_EN_US][L10N_LOGIN_BTN],
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.instance_text = "Or",
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.instance_url = "Instance url",
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.instance_submit = "Authorize"
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};
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page = tmpl_gen_login(&tdata, NULL);
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struct base_page b = {
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.category = BASE_CAT_NONE,
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.content = page,
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.sidebar_left = NULL
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};
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// Output
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render_base_page(&b, req, ssn, api);
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// Cleanup
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mastodont_storage_cleanup(&storage);
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mastodont_storage_cleanup(&oauth_store);
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if (error) free(error);
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if (page) free(page);
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}
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