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login.c
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login.c
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/*
This file is part of toot.
toot 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.
toot 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 toot. If not, see <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <curl/curl.h>
#include <readline/readline.h>
#include <json-c/json.h>
#include "asprintf.h"
#include "util.h"
/* I am confident to present you, without a doubt, the worst code i've
* ever written */
static int
get_client_id(struct config *config)
{
char *api_url = "/api/v1/apps";
CURL *curl = curl_easy_init();
if(curl == NULL) {
fprintf(stderr, "Error creating curl (what?)\n");
return -1;
}
struct memory chunk = { 0 };
char *post_url = NULL;
dm_asprintf(&post_url, "%s%s", config->instance, api_url);
curl_easy_setopt(curl, CURLOPT_URL, post_url);
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, cb);
curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void *)&chunk);
/* TODO: Better way lol */
/* If someone wants to do it, use curl_mime thing, I am to lazy
* to do this
*/
curl_easy_setopt(curl,
CURLOPT_POSTFIELDS,
"client_name=Toot"
"&redirect_uris=urn:ietf:wg:oauth:2.0:oob"
"&scopes=read+write+follow"
"&website=https://github.com/ScaredyCat/Toot");
curl_easy_perform(curl);
curl_easy_cleanup(curl);
free(post_url);
struct json_object *parsed_json;
struct json_object *json_client_id;
struct json_object *json_client_secret;
parsed_json = json_tokener_parse(chunk.response);
if(parsed_json == NULL) {
fprintf(stderr, "error\n");
free_response(&chunk);
return -1;
}
json_object_object_get_ex(parsed_json, "client_id", &json_client_id);
json_object_object_get_ex(
parsed_json, "client_secret", &json_client_secret);
const char *client_id = json_object_get_string(json_client_id);
const char *client_secret = json_object_get_string(json_client_secret);
int ret;
if(!client_id || !client_secret) {
eputs("Can't get client_id or client_secret");
ret = -1;
} else {
dm_strncpy(config->client_id, client_id, sizeof(config->client_id));
dm_strncpy(config->client_secret,
client_secret,
sizeof(config->client_secret));
ret = 0;
}
free_response(&chunk);
return ret;
}
static char *
ask_for_token(struct config *config)
{
const char *api_url = "/oauth/authorize?";
char *fmt = "%s%s"
"client_id=%s"
"&redirect_uri=urn:ietf:wg:oauth:2.0:oob"
"&response_type=code"
"&scope=read+write+follow\n";
printf(fmt, config->instance, api_url, config->client_id);
return readline("Please log in in that url and paste the code here: ");
}
static int
get_token(struct config *config, const char *code)
{
char *fmt = "client_id=%s"
"&client_secret=%s"
"&redirect_uri=urn:ietf:wg:oauth:2.0:oob"
"&code=%s"
"&grant_type=authorization_code"
"&scope=read+write+follow";
const char *api_url = "/oauth/token";
CURL *curl = curl_easy_init();
if(curl == NULL) {
fprintf(stderr, "Error creating curl (what?)\n");
return -1;
}
struct memory chunk = { 0 };
char *post_token_url;
char *post_url;
dm_asprintf(
&post_token_url, fmt, config->client_id, config->client_secret, code);
dm_asprintf(&post_url, "%s%s", config->instance, api_url);
curl_easy_setopt(curl, CURLOPT_URL, post_url);
curl_easy_setopt(curl, CURLOPT_POSTFIELDS, post_token_url);
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, cb);
curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void *)&chunk);
curl_easy_perform(curl);
curl_easy_cleanup(curl);
free(post_token_url);
free(post_url);
struct json_object *parsed_json;
struct json_object *json_access_token;
parsed_json = json_tokener_parse(chunk.response);
json_object_object_get_ex(parsed_json, "access_token", &json_access_token);
const char *access_token = json_object_get_string(json_access_token);
int ret;
if(!access_token) {
eputs("Can't get access_token");
ret = -1;
} else {
dm_strncpy(config->access_token,
access_token,
sizeof(config->access_token));
ret = 0;
}
free_response(&chunk);
return ret;
}
int
setup()
{
struct config config;
dm_strncpy(
config.instance,
readline("Enter your instance (e.g. https://social.fnord.tld) "),
sizeof(config.instance));
if(get_client_id(&config) < 0)
return -1;
char *code = ask_for_token(&config);
if(get_token(&config, code) < 0) {
free(code);
return -1;
}
store_config(&config);
free(code);
return 0;
}