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/* snac - A simple, minimalistic ActivityPub instance */
/* copyright (c) 2022 grunfink - MIT license */
#define XS_IMPLEMENTATION
#include "xs.h"
#include "xs_io.h"
#include "xs_encdec.h"
#include "xs_json.h"
#include "xs_curl.h"
#include "xs_openssl.h"
#include "xs_socket.h"
#include "xs_httpd.h"
#include "xs_mime.h"
#include "xs_regex.h"
#include "snac.h"
#include <sys/time.h>
#include <sys/stat.h>
d_char *srv_basedir = NULL;
d_char *srv_config = NULL;
d_char *srv_baseurl = NULL;
int srv_running = 0;
int dbglevel = 0;
d_char *xs_time(char *fmt, int local)
/* returns a d_char with a formated time */
{
time_t t = time(NULL);
struct tm tm;
char tmp[64];
if (local)
localtime_r(&t, &tm);
else
gmtime_r(&t, &tm);
strftime(tmp, sizeof(tmp), fmt, &tm);
return xs_str_new(tmp);
}
d_char *tid(int offset)
/* returns a time-based Id */
{
struct timeval tv;
struct timezone tz;
gettimeofday(&tv, &tz);
return xs_fmt("%10d.%06d", tv.tv_sec + offset, tv.tv_usec);
}
int validate_uid(char *uid)
/* returns if uid is a valid identifier */
{
while (*uid) {
if (!(isalnum(*uid) || *uid == '_'))
return 0;
uid++;
}
return 1;
}
void srv_debug(int level, d_char *str)
/* logs a debug message */
{
xs *msg = str;
if (xs_str_in(msg, srv_basedir) != -1) {
/* replace basedir with ~ */
msg = xs_replace_i(msg, srv_basedir, "~");
}
if (dbglevel >= level) {
xs *tm = xs_local_time("%H:%M:%S");
fprintf(stderr, "%s %s\n", tm, msg);
}
}
void snac_debug(snac *snac, int level, d_char *str)
/* prints a user debugging information */
{
xs *o_str = str;
d_char *msg = xs_fmt("[%s] %s", snac->uid, o_str);
if (xs_str_in(msg, snac->basedir) != -1) {
/* replace long basedir references with ~ */
msg = xs_replace_i(msg, snac->basedir, "~");
}
srv_debug(level, msg);
}
d_char *hash_password(char *uid, char *passwd, char *nonce)
/* hashes a password */
{
xs *d_nonce = NULL;
xs *combi;
xs *hash;
if (nonce == NULL)
nonce = d_nonce = xs_fmt("%08x", random());
combi = xs_fmt("%s:%s:%s", nonce, uid, passwd);
hash = xs_sha1_hex(combi, strlen(combi));
return xs_fmt("%s:%s", nonce, hash);
}
int check_password(char *uid, char *passwd, char *hash)
/* checks a password */
{
int ret = 0;
xs *spl = xs_split_n(hash, ":", 1);
if (xs_list_len(spl) == 2) {
xs *n_hash = hash_password(uid, passwd, xs_list_get(spl, 0));
ret = (strcmp(hash, n_hash) == 0);
}
return ret;
}
void srv_archive(char *direction, char *req, char *payload, int p_size,
int status, char *headers, char *body, int b_size)
/* archives a connection */
{
/* obsessive archiving */
xs *date = tid(0);
xs *dir = xs_fmt("%s/archive/%s_%s", srv_basedir, date, direction);
FILE *f;
if (mkdir(dir, 0755) != -1) {
xs *meta_fn = xs_fmt("%s/_META", dir);
if ((f = fopen(meta_fn, "w")) != NULL) {
xs *j1 = xs_json_dumps_pp(req, 4);
xs *j2 = xs_json_dumps_pp(headers, 4);
fprintf(f, "dir: %s\n", direction);
fprintf(f, "req: %s\n", j1);
fprintf(f, "p_size: %d\n", p_size);
fprintf(f, "status: %d\n", status);
fprintf(f, "response: %s\n", j2);
fprintf(f, "b_size: %d\n", b_size);
fclose(f);
}
if (p_size && payload) {
xs *payload_fn = NULL;
xs *payload_fn_raw = NULL;
char *v = xs_dict_get(req, "content-type");
if (v && xs_str_in(v, "json") != -1) {
payload_fn = xs_fmt("%s/payload.json", dir);
if ((f = fopen(payload_fn, "w")) != NULL) {
xs *v1 = xs_json_loads(payload);
xs *j1 = NULL;
if (v1 != NULL)
j1 = xs_json_dumps_pp(v1, 4);
if (j1 != NULL)
fwrite(j1, strlen(j1), 1, f);
else
fwrite(payload, p_size, 1, f);
fclose(f);
}
}
payload_fn_raw = xs_fmt("%s/payload", dir);
if ((f = fopen(payload_fn_raw, "w")) != NULL) {
fwrite(payload, p_size, 1, f);
fclose(f);
}
}
if (b_size && body) {
xs *body_fn = NULL;
char *v = xs_dict_get(headers, "content-type");
if (v && xs_str_in(v, "json") != -1) {
body_fn = xs_fmt("%s/body.json", dir);
if ((f = fopen(body_fn, "w")) != NULL) {
xs *v1 = xs_json_loads(body);
xs *j1 = NULL;
if (v1 != NULL)
j1 = xs_json_dumps_pp(v1, 4);
if (j1 != NULL)
fwrite(j1, strlen(j1), 1, f);
else
fwrite(body, b_size, 1, f);
fclose(f);
}
}
else {
body_fn = xs_fmt("%s/body", dir);
if ((f = fopen(body_fn, "w")) != NULL) {
fwrite(body, b_size, 1, f);
fclose(f);
}
}
}
}
}
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