2023-04-08 04:09:05 +00:00
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/* snac - A simple, minimalistic ActivityPub instance */
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/* copyright (c) 2022 - 2023 grunfink / MIT license */
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#include "xs.h"
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#include "xs_encdec.h"
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#include "xs_json.h"
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2023-04-08 08:29:33 +00:00
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#include "xs_io.h"
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2023-04-08 04:09:05 +00:00
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#include "xs_time.h"
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#include "snac.h"
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2023-04-08 07:09:43 +00:00
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static xs_str *random_str(void)
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/* just what is says in the tin */
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{
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unsigned int data[4] = {0};
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FILE *f;
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if ((f = fopen("/dev/random", "r")) != NULL) {
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fread(data, sizeof(data), 1, f);
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fclose(f);
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}
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else {
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data[0] = random() % 0xffffffff;
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data[1] = random() % 0xffffffff;
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data[2] = random() % 0xffffffff;
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data[3] = random() % 0xffffffff;
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}
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return xs_hex_enc((char *)data, sizeof(data));
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}
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2023-04-08 08:29:33 +00:00
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int app_add(const char *id, const xs_dict *app)
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/* stores an app */
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{
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int status = 201;
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xs *fn = xs_fmt("%s/app/", srv_basedir);
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FILE *f;
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mkdirx(fn);
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fn = xs_str_cat(fn, id);
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fn = xs_str_cat(fn, ".json");
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if ((f = fopen(fn, "w")) != NULL) {
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xs *j = xs_json_dumps_pp(app, 4);
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fwrite(j, strlen(j), 1, f);
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fclose(f);
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}
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else
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status = 500;
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return status;
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}
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xs_dict *app_get(const char *id)
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/* gets an app */
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{
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xs *fn = xs_fmt("%s/app/%s.json", srv_basedir, id);
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xs_dict *app = NULL;
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FILE *f;
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if ((f = fopen(fn, "r")) != NULL) {
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xs *j = xs_readall(f);
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fclose(f);
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app = xs_json_loads(j);
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}
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return app;
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}
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2023-04-09 19:31:56 +00:00
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int token_add(const char *id, const xs_dict *token)
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/* stores a token */
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{
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int status = 201;
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xs *fn = xs_fmt("%s/token/", srv_basedir);
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FILE *f;
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mkdirx(fn);
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fn = xs_str_cat(fn, id);
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fn = xs_str_cat(fn, ".json");
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if ((f = fopen(fn, "w")) != NULL) {
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xs *j = xs_json_dumps_pp(token, 4);
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fwrite(j, strlen(j), 1, f);
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fclose(f);
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}
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else
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status = 500;
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return status;
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}
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xs_dict *token_get(const char *id)
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/* gets a token */
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{
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xs *fn = xs_fmt("%s/token/%s.json", srv_basedir, id);
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xs_dict *token = NULL;
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FILE *f;
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if ((f = fopen(fn, "r")) != NULL) {
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xs *j = xs_readall(f);
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fclose(f);
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token = xs_json_loads(j);
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}
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return token;
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}
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int token_del(const char *id)
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/* deletes a token */
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{
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xs *fn = xs_fmt("%s/token/%s.json", srv_basedir, id);
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return unlink(fn);
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}
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2023-04-08 07:27:22 +00:00
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const char *login_page = ""
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"<!DOCTYPE html>\n"
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2023-04-09 18:34:05 +00:00
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"<body><h1>%s OAuth identify</h1>\n"
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"<div style=\"background-color: red; color: white\">%s</div>\n"
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2023-04-08 07:27:22 +00:00
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"<form method=\"post\" action=\"https:/" "/%s/oauth/x-snac-login\">\n"
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"<p>Login: <input type=\"text\" name=\"login\"></p>\n"
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"<p>Password: <input type=\"password\" name=\"passwd\"></p>\n"
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"<input type=\"hidden\" name=\"redir\" value=\"%s\">\n"
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2023-04-08 08:29:33 +00:00
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"<input type=\"hidden\" name=\"cid\" value=\"%s\">\n"
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2023-04-09 18:34:05 +00:00
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"<input type=\"submit\" value=\"OK\">\n"
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2023-04-08 07:27:22 +00:00
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"</form><p>%s</p></body>\n"
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"";
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2023-04-08 07:09:43 +00:00
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int oauth_get_handler(const xs_dict *req, const char *q_path,
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2023-04-08 04:09:05 +00:00
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char **body, int *b_size, char **ctype)
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{
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2023-04-08 05:04:40 +00:00
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if (!xs_startswith(q_path, "/oauth/"))
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return 0;
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2023-04-08 07:09:43 +00:00
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{
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xs *j = xs_json_dumps_pp(req, 4);
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2023-04-09 18:34:05 +00:00
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printf("oauth get:\n%s\n", j);
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2023-04-08 07:09:43 +00:00
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}
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2023-04-08 05:04:40 +00:00
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int status = 404;
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2023-04-08 07:09:43 +00:00
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xs_dict *msg = xs_dict_get(req, "q_vars");
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2023-04-08 05:04:40 +00:00
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xs *cmd = xs_replace(q_path, "/oauth", "");
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2023-04-09 18:34:05 +00:00
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srv_debug(0, xs_fmt("oauth_get_handler %s", q_path));
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2023-04-08 05:04:40 +00:00
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if (strcmp(cmd, "/authorize") == 0) {
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const char *cid = xs_dict_get(msg, "client_id");
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const char *ruri = xs_dict_get(msg, "redirect_uri");
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const char *rtype = xs_dict_get(msg, "response_type");
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2023-04-08 08:29:33 +00:00
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status = 400;
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2023-04-08 05:04:40 +00:00
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if (cid && ruri && rtype && strcmp(rtype, "code") == 0) {
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2023-04-08 08:29:33 +00:00
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xs *app = app_get(cid);
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2023-04-08 07:27:22 +00:00
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2023-04-08 08:29:33 +00:00
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if (app != NULL) {
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const char *host = xs_dict_get(srv_config, "host");
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2023-04-09 18:34:05 +00:00
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*body = xs_fmt(login_page, host, "", host, ruri, cid, USER_AGENT);
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2023-04-08 08:29:33 +00:00
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*ctype = "text/html";
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status = 200;
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2023-04-09 18:34:05 +00:00
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srv_debug(0, xs_fmt("oauth authorize: generating login page"));
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2023-04-08 08:29:33 +00:00
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}
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2023-04-09 18:34:05 +00:00
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else
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srv_debug(0, xs_fmt("oauth authorize: bad client_id %s", cid));
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2023-04-08 05:04:40 +00:00
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}
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2023-04-09 18:34:05 +00:00
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else
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srv_debug(0, xs_fmt("oauth authorize: invalid or unset arguments"));
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2023-04-08 05:04:40 +00:00
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}
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2023-04-08 07:09:43 +00:00
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return status;
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}
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int oauth_post_handler(const xs_dict *req, const char *q_path,
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2023-04-09 18:34:05 +00:00
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const char *payload, int p_size,
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char **body, int *b_size, char **ctype)
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2023-04-08 07:09:43 +00:00
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{
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if (!xs_startswith(q_path, "/oauth/"))
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return 0;
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2023-04-09 18:34:05 +00:00
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{
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xs *j = xs_json_dumps_pp(req, 4);
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printf("oauth post:\n%s\n", j);
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}
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2023-04-08 07:09:43 +00:00
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int status = 404;
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xs_dict *msg = xs_dict_get(req, "p_vars");
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xs *cmd = xs_replace(q_path, "/oauth", "");
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2023-04-09 18:34:05 +00:00
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srv_debug(0, xs_fmt("oauth_post_handler %s", q_path));
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if (strcmp(cmd, "/x-snac-login") == 0) {
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const char *login = xs_dict_get(msg, "login");
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const char *passwd = xs_dict_get(msg, "passwd");
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const char *redir = xs_dict_get(msg, "redir");
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const char *cid = xs_dict_get(msg, "cid");
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const char *host = xs_dict_get(srv_config, "host");
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/* by default, generate another login form with an error */
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*body = xs_fmt(login_page, host, "LOGIN INCORRECT", host, redir, cid, USER_AGENT);
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*ctype = "text/html";
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status = 200;
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if (login && passwd && redir && cid) {
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snac snac;
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2023-04-08 07:09:43 +00:00
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2023-04-09 18:34:05 +00:00
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if (user_open(&snac, login)) {
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/* check the login + password */
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if (check_password(login, passwd,
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xs_dict_get(snac.config, "passwd"))) {
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/* success! redirect to the desired uri */
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xs *code = random_str();
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xs_free(*body);
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*body = xs_fmt("%s?code=%s", redir, code);
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status = 303;
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2023-04-09 19:31:56 +00:00
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srv_debug(0, xs_fmt("oauth x-snac-login: success, redirect to %s", *body));
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/* assign the login to the app */
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xs *app = app_get(cid);
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if (app != NULL) {
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app = xs_dict_set(app, "uid", login);
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app = xs_dict_set(app, "code", code);
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app_add(cid, app);
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}
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else
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srv_log(xs_fmt("oauth x-snac-login: error getting app %s", cid));
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2023-04-09 18:34:05 +00:00
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}
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else
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srv_debug(0, xs_fmt("oauth x-snac-login: login '%s' incorrect", login));
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user_free(&snac);
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}
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else
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srv_debug(0, xs_fmt("oauth x-snac-login: bad user '%s'", login));
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}
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else
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srv_debug(0, xs_fmt("oauth x-snac-login: invalid or unset arguments"));
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}
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else
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2023-04-08 05:04:40 +00:00
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if (strcmp(cmd, "/token") == 0) {
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const char *gtype = xs_dict_get(msg, "grant_type");
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const char *code = xs_dict_get(msg, "code");
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const char *cid = xs_dict_get(msg, "client_id");
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const char *csec = xs_dict_get(msg, "client_secret");
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const char *ruri = xs_dict_get(msg, "redirect_uri");
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if (gtype && code && cid && csec && ruri) {
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2023-04-09 19:31:56 +00:00
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xs *app = app_get(cid);
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2023-04-08 05:04:40 +00:00
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2023-04-09 19:31:56 +00:00
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if (app == NULL) {
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status = 401;
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srv_log(xs_fmt("oauth token: invalid app %s", cid));
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}
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else
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if (strcmp(csec, xs_dict_get(app, "client_secret")) != 0) {
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status = 401;
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srv_log(xs_fmt("oauth token: invalid client_secret for app %s", cid));
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}
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else {
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xs *rsp = xs_dict_new();
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xs *cat = xs_number_new(time(NULL));
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xs *tokid = random_str();
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2023-04-08 05:04:40 +00:00
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2023-04-09 19:31:56 +00:00
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rsp = xs_dict_append(rsp, "access_token", tokid);
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rsp = xs_dict_append(rsp, "token_type", "Bearer");
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rsp = xs_dict_append(rsp, "created_at", cat);
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*body = xs_json_dumps_pp(rsp, 4);
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*ctype = "application/json";
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status = 200;
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const char *uid = xs_dict_get(app, "uid");
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srv_debug(0, xs_fmt("oauth token: "
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"successful login for %s, new token %s", uid, tokid));
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xs *token = xs_dict_new();
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token = xs_dict_append(token, "token", tokid);
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token = xs_dict_append(token, "client_id", cid);
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token = xs_dict_append(token, "client_secret", csec);
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token = xs_dict_append(token, "uid", uid);
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token = xs_dict_append(token, "code", code);
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2023-04-09 18:34:05 +00:00
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2023-04-09 19:31:56 +00:00
|
|
|
token_add(tokid, token);
|
|
|
|
|
}
|
2023-04-08 05:04:40 +00:00
|
|
|
}
|
2023-04-09 18:34:05 +00:00
|
|
|
else {
|
|
|
|
|
srv_debug(0, xs_fmt("oauth token: invalid or unset arguments"));
|
2023-04-08 05:04:40 +00:00
|
|
|
status = 400;
|
2023-04-09 18:34:05 +00:00
|
|
|
}
|
2023-04-08 05:04:40 +00:00
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
if (strcmp(cmd, "/revoke") == 0) {
|
2023-04-08 07:09:43 +00:00
|
|
|
const char *cid = xs_dict_get(msg, "client_id");
|
|
|
|
|
const char *csec = xs_dict_get(msg, "client_secret");
|
2023-04-09 19:31:56 +00:00
|
|
|
const char *tokid = xs_dict_get(msg, "token");
|
|
|
|
|
|
|
|
|
|
if (cid && csec && tokid) {
|
|
|
|
|
xs *token = token_get(tokid);
|
2023-04-08 07:09:43 +00:00
|
|
|
|
|
|
|
|
*body = xs_str_new("{}");
|
|
|
|
|
*ctype = "application/json";
|
2023-04-09 19:31:56 +00:00
|
|
|
|
|
|
|
|
if (token == NULL || strcmp(csec, xs_dict_get(token, "client_secret")) != 0) {
|
|
|
|
|
srv_debug(0, xs_fmt("oauth revoke: bad secret for token %s", tokid));
|
|
|
|
|
status = 403;
|
|
|
|
|
}
|
|
|
|
|
else {
|
|
|
|
|
token_del(tokid);
|
|
|
|
|
srv_debug(0, xs_fmt("oauth revoke: revoked token %s", tokid));
|
|
|
|
|
status = 200;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
else {
|
|
|
|
|
srv_debug(0, xs_fmt("oauth revoke: invalid or unset arguments"));
|
|
|
|
|
status = 403;
|
2023-04-08 07:09:43 +00:00
|
|
|
}
|
2023-04-08 05:04:40 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return status;
|
|
|
|
|
}
|
|
|
|
|
|
2023-04-08 04:09:05 +00:00
|
|
|
|
2023-04-09 18:34:05 +00:00
|
|
|
int mastoapi_get_handler(const xs_dict *req, const char *q_path,
|
|
|
|
|
char **body, int *b_size, char **ctype)
|
|
|
|
|
{
|
|
|
|
|
if (!xs_startswith(q_path, "/api/v1/"))
|
|
|
|
|
return 0;
|
|
|
|
|
|
2023-04-09 19:31:56 +00:00
|
|
|
srv_debug(0, xs_fmt("mastoapi_get_handler %s", q_path));
|
|
|
|
|
|
2023-04-09 18:34:05 +00:00
|
|
|
{
|
|
|
|
|
xs *j = xs_json_dumps_pp(req, 4);
|
|
|
|
|
printf("mastoapi get:\n%s\n", j);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
int status = 404;
|
|
|
|
|
xs_dict *msg = xs_dict_get(req, "q_vars");
|
|
|
|
|
xs *cmd = xs_replace(q_path, "/api/v1", "");
|
2023-04-09 19:31:56 +00:00
|
|
|
char *v;
|
2023-04-09 18:34:05 +00:00
|
|
|
|
2023-04-09 19:31:56 +00:00
|
|
|
snac snac = {0};
|
|
|
|
|
int logged_in = 0;
|
|
|
|
|
|
|
|
|
|
/* if there is an authorization field, try to validate it */
|
|
|
|
|
if (!xs_is_null(v = xs_dict_get(req, "authorization")) && xs_startswith(v, "Bearer ")) {
|
|
|
|
|
xs *tokid = xs_replace(v, "Bearer ", "");
|
|
|
|
|
xs *token = token_get(tokid);
|
|
|
|
|
|
|
|
|
|
if (token != NULL) {
|
|
|
|
|
const char *uid = xs_dict_get(token, "uid");
|
|
|
|
|
|
|
|
|
|
if (!xs_is_null(uid) && user_open(&snac, uid)) {
|
|
|
|
|
logged_in = 1;
|
|
|
|
|
srv_debug(0, xs_fmt("mastoapi auth: valid token for user %s", uid));
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
srv_log(xs_fmt("mastoapi auth: corrupted token %s", tokid));
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
srv_log(xs_fmt("mastoapi auth: invalid token %s", tokid));
|
|
|
|
|
}
|
2023-04-09 18:34:05 +00:00
|
|
|
|
|
|
|
|
if (strcmp(cmd, "/accounts/verify_credentials") == 0) {
|
2023-04-09 19:31:56 +00:00
|
|
|
if (logged_in) {
|
|
|
|
|
xs_dict *acct = xs_dict_new();
|
|
|
|
|
|
|
|
|
|
acct = xs_dict_append(acct, "id", xs_dict_get(snac.config, "uid"));
|
|
|
|
|
acct = xs_dict_append(acct, "username", xs_dict_get(snac.config, "uid"));
|
|
|
|
|
acct = xs_dict_append(acct, "acct", xs_dict_get(snac.config, "uid"));
|
|
|
|
|
acct = xs_dict_append(acct, "display_name", xs_dict_get(snac.config, "name"));
|
|
|
|
|
acct = xs_dict_append(acct, "created_at", xs_dict_get(snac.config, "published"));
|
|
|
|
|
acct = xs_dict_append(acct, "note", xs_dict_get(snac.config, "bio"));
|
|
|
|
|
acct = xs_dict_append(acct, "url", snac.actor);
|
|
|
|
|
acct = xs_dict_append(acct, "avatar", xs_dict_get(snac.config, "avatar"));
|
|
|
|
|
|
|
|
|
|
*body = xs_json_dumps_pp(acct, 4);
|
|
|
|
|
*ctype = "application/json";
|
|
|
|
|
status = 200;
|
|
|
|
|
}
|
|
|
|
|
else {
|
|
|
|
|
status = 422; // "Unprocessable entity" (no login)
|
|
|
|
|
}
|
2023-04-09 18:34:05 +00:00
|
|
|
}
|
|
|
|
|
|
2023-04-09 19:31:56 +00:00
|
|
|
/* user cleanup */
|
|
|
|
|
if (logged_in)
|
|
|
|
|
user_free(&snac);
|
|
|
|
|
|
2023-04-09 18:34:05 +00:00
|
|
|
return status;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
2023-04-08 07:09:43 +00:00
|
|
|
int mastoapi_post_handler(const xs_dict *req, const char *q_path,
|
2023-04-09 18:34:05 +00:00
|
|
|
const char *payload, int p_size,
|
|
|
|
|
char **body, int *b_size, char **ctype)
|
2023-04-08 05:04:40 +00:00
|
|
|
{
|
2023-04-08 04:09:05 +00:00
|
|
|
if (!xs_startswith(q_path, "/api/v1/"))
|
|
|
|
|
return 0;
|
|
|
|
|
|
2023-04-09 18:34:05 +00:00
|
|
|
{
|
|
|
|
|
xs *j = xs_json_dumps_pp(req, 4);
|
|
|
|
|
printf("mastoapi post:\n%s\n", j);
|
|
|
|
|
}
|
|
|
|
|
|
2023-04-08 05:04:40 +00:00
|
|
|
int status = 404;
|
|
|
|
|
xs *msg = NULL;
|
|
|
|
|
char *i_ctype = xs_dict_get(req, "content-type");
|
|
|
|
|
|
|
|
|
|
if (xs_startswith(i_ctype, "application/json"))
|
|
|
|
|
msg = xs_json_loads(payload);
|
|
|
|
|
else
|
|
|
|
|
msg = xs_dup(xs_dict_get(req, "p_vars"));
|
|
|
|
|
|
|
|
|
|
if (msg == NULL)
|
|
|
|
|
return 400;
|
|
|
|
|
|
|
|
|
|
{
|
|
|
|
|
xs *j = xs_json_dumps_pp(req, 4);
|
|
|
|
|
printf("%s\n", j);
|
|
|
|
|
}
|
|
|
|
|
{
|
|
|
|
|
xs *j = xs_json_dumps_pp(msg, 4);
|
|
|
|
|
printf("%s\n", j);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
xs *cmd = xs_replace(q_path, "/api/v1", "");
|
|
|
|
|
|
|
|
|
|
if (strcmp(cmd, "/apps") == 0) {
|
|
|
|
|
const char *name = xs_dict_get(msg, "client_name");
|
|
|
|
|
const char *ruri = xs_dict_get(msg, "redirect_uris");
|
|
|
|
|
|
|
|
|
|
if (name && ruri) {
|
2023-04-08 07:09:43 +00:00
|
|
|
xs *app = xs_dict_new();
|
|
|
|
|
xs *id = xs_replace_i(tid(0), ".", "");
|
|
|
|
|
xs *cid = random_str();
|
|
|
|
|
xs *csec = random_str();
|
|
|
|
|
xs *vkey = random_str();
|
|
|
|
|
|
|
|
|
|
app = xs_dict_append(app, "name", name);
|
|
|
|
|
app = xs_dict_append(app, "redirect_uri", ruri);
|
|
|
|
|
app = xs_dict_append(app, "client_id", cid);
|
|
|
|
|
app = xs_dict_append(app, "client_secret", csec);
|
|
|
|
|
app = xs_dict_append(app, "vapid_key", vkey);
|
|
|
|
|
app = xs_dict_append(app, "id", id);
|
2023-04-08 05:04:40 +00:00
|
|
|
|
|
|
|
|
*body = xs_json_dumps_pp(app, 4);
|
|
|
|
|
*ctype = "application/json";
|
|
|
|
|
status = 200;
|
2023-04-08 08:29:33 +00:00
|
|
|
|
|
|
|
|
app = xs_dict_append(app, "code", "");
|
|
|
|
|
app_add(cid, app);
|
2023-04-08 05:04:40 +00:00
|
|
|
}
|
|
|
|
|
}
|
2023-04-08 04:09:05 +00:00
|
|
|
|
|
|
|
|
return status;
|
|
|
|
|
}
|
