mirror of
https://codeberg.org/grunfink/snac2.git
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126 lines
2.3 KiB
C
126 lines
2.3 KiB
C
/* snac - A simple, minimalistic ActivityPub instance */
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/* copyright (c) 2022 grunfink - MIT license */
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#define XS_IMPLEMENTATION
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#include "xs.h"
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#include "xs_io.h"
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#include "xs_encdec.h"
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#include "xs_json.h"
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#include "xs_curl.h"
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#include "xs_openssl.h"
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#include "xs_socket.h"
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#include "xs_httpd.h"
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#include "snac.h"
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#include <sys/time.h>
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d_char *srv_basedir = NULL;
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d_char *srv_config = NULL;
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d_char *srv_baseurl = NULL;
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int srv_running = 0;
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int dbglevel = 0;
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d_char *xs_time(char *fmt, int local)
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/* returns a d_char with a formated time */
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{
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time_t t = time(NULL);
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struct tm tm;
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char tmp[64];
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if (local)
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localtime_r(&t, &tm);
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else
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gmtime_r(&t, &tm);
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strftime(tmp, sizeof(tmp), fmt, &tm);
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return xs_str_new(tmp);
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}
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d_char *tid(int offset)
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/* returns a time-based Id */
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{
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struct timeval tv;
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struct timezone tz;
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gettimeofday(&tv, &tz);
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return xs_fmt("%10d.%06d", tv.tv_sec + offset, tv.tv_usec);
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}
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void srv_debug(int level, d_char *str)
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/* logs a debug message */
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{
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xs *msg = str;
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if (dbglevel >= level) {
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xs *tm = xs_local_time("%H:%M:%S");
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fprintf(stderr, "%s %s\n", tm, msg);
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}
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}
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int validate_uid(char *uid)
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/* returns if uid is a valid identifier */
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{
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while (*uid) {
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if (!(isalnum(*uid) || *uid == '_'))
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return 0;
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uid++;
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}
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return 1;
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}
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void snac_debug(snac *snac, int level, d_char *str)
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/* prints a user debugging information */
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{
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xs *msg = str;
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if (dbglevel >= level) {
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xs *tm = xs_local_time("%H:%M:%S");
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fprintf(stderr, "%s [%s] %s\n", tm, snac->uid, msg);
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}
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}
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d_char *hash_password(char *uid, char *passwd, char *nonce)
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/* hashes a password */
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{
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xs *d_nonce = NULL;
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xs *combi;
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xs *hash;
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if (nonce == NULL)
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nonce = d_nonce = xs_fmt("%08x", random());
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combi = xs_fmt("%s:%s:%s", nonce, uid, passwd);
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hash = xs_sha1_hex(combi, strlen(combi));
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return xs_fmt("%s:%s", nonce, hash);
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}
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int check_password(char *uid, char *passwd, char *hash)
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/* checks a password */
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{
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int ret = 0;
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xs *spl = xs_split_n(hash, ":", 1);
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if (xs_list_len(spl) == 2) {
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xs *n_hash = hash_password(uid, passwd, xs_list_get(spl, 0));
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ret = (strcmp(hash, n_hash) == 0);
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}
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return ret;
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}
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