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/*
* Sauerbraten coopedit helper bot
*
* Copyright (C) 2007 Michael Buesch <mb@bu3sch.de>
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the authors be held liable for any damages
* arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
* 3. This notice may not be removed or altered from any source distribution.
*/
#include "main.h"
#include "auth.h"
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <time.h>
static char random_char_from_array(const char *array, size_t len)
{
return array[random_int() % len];
}
/* sizeof(buf) >= len + 1 */
static void gen_pronounceable_string(char *buf, size_t len)
{
static const char *consonants = "bcdfghjklmnpqrstvwx"; /* no y,z */
static const char *vowels = "aeiou";
const size_t consonants_len = strlen(consonants);
const size_t vowels_len = strlen(vowels);
enum {
TYPE_RANDOM, TYPE_CONSONANT, TYPE_VOWEL,
} next_type;
int nr_consonants = 0;
int nr_vowels = 0;
int rnd;
size_t i;
char c;
for (i = 0; i < len; i++) {
if (i == 1 && nr_consonants == 1) {
/* Do not start with two consonants */
next_type = TYPE_VOWEL;
nr_consonants = 0;
} else if (nr_vowels == 1) {
next_type = TYPE_CONSONANT;
nr_vowels = 0;
} else if (nr_consonants == 2) {
next_type = TYPE_VOWEL;
nr_consonants = 0;
} else
next_type = TYPE_RANDOM;
if (next_type == TYPE_RANDOM) {
rnd = random_int() % 2;
if (rnd == 0)
next_type = TYPE_CONSONANT;
else
next_type = TYPE_VOWEL;
}
switch (next_type) {
case TYPE_CONSONANT:
c = random_char_from_array(consonants, consonants_len);
buf[i] = c;
nr_consonants++;
break;
case TYPE_VOWEL:
c = random_char_from_array(vowels, vowels_len);
buf[i] = c;
nr_vowels++;
break;
case TYPE_RANDOM:
/* Can't happen */
fprintf(stderr, "TYPE_RANDOM\n");
exit(1);
}
}
buf[i] = '\0';
}
void gen_authmap(struct sbot_authmap *map)
{
struct sbot_authkey *key;
int i;
for (i = 0; i < NR_AUTHKEYS; i++) {
key = &(map->keys[i]);
gen_pronounceable_string(key->key, AUTHKEY_LEN);
}
map->mapid = (random_int() & 0xFFFF);
}
int do_export_authmap(const struct sbot_authmap *map, FILE *fd)
{
unsigned int i;
time_t t;
struct tm *loc;
t = time(NULL);
loc = localtime(&t);
fprintf(fd, "# Sauerbot authentication map.\n");
fprintf(fd, "# This is private information.\n");
fprintf(fd, "#\n");
fprintf(fd, "# %s", asctime(loc));
fprintf(fd, "#\n");
fprintf(fd, "\n");
fprintf(fd, "MAPID: %04X\n", map->mapid);
fprintf(fd, "\n");
for (i = 0; i < NR_AUTHKEYS; i++) {
if ((i % 5 == 0) && (i != 0))
fprintf(fd, "\n");
fprintf(fd, "%02u: %s ", i, map->keys[i].key);
}
fprintf(fd, "\n");
return 0;
}
int export_authmap(const struct sbot_authmap *map, const char *file)
{
FILE *fd;
int err;
printf("Exporting authentication map...\n");
fd = fopen(file, "w+");
if (!fd) {
fprintf(stderr, "Could not open authmap export file %s: %s\n",
file, strerror(errno));
return -1;
}
err = do_export_authmap(map, fd);
if (err) {
fprintf(stderr, "Failed to write authmap export file \"%s\"\n",
file);\
fclose(fd);
return -1;
}
fclose(fd);
return 0;
}
int do_import_authmap(struct sbot_authmap *map, FILE *fd)
{
ssize_t len;
size_t blen = 0;
char *buf = NULL;
unsigned int tmp, i;
unsigned int a, b, c, d, e;
char b1[21];
char b2[21];
char b3[21];
char b4[21];
char b5[21];
memset(map, 0, sizeof(*map));
while ((len = getline(&buf, &blen, fd)) > 0) {
if (buf[0] == '#')
continue;
if (sscanf(buf, "MAPID: %04X", &tmp) == 1) {
map->mapid = tmp;
map->mapid_ok = 1;
continue;
}
if (sscanf(buf, "%02u: %20s %02u: %20s %02u: %20s %02u: %20s %02u: %20s",
&a, b1, &b, b2, &c, b3, &d, b4, &e, b5) == 10) {
if ((b != a + 1) || (c != a + 2) ||
(d != a + 3) || (e != a + 4))
continue;
if (e >= NR_AUTHKEYS)
continue;
strncpy(map->keys[a].key, b1, AUTHKEY_LEN);
map->keys[a].ok = 1;
strncpy(map->keys[b].key, b2, AUTHKEY_LEN);
map->keys[b].ok = 1;
strncpy(map->keys[c].key, b3, AUTHKEY_LEN);
map->keys[c].ok = 1;
strncpy(map->keys[d].key, b4, AUTHKEY_LEN);
map->keys[d].ok = 1;
strncpy(map->keys[e].key, b5, AUTHKEY_LEN);
map->keys[e].ok = 1;
}
}
if (!map->mapid_ok)
fprintf(stderr, "Authmap import: Missing MAPID number\n");
for (i = 0; i < NR_AUTHKEYS; i++) {
if (!map->keys[i].ok) {
fprintf(stderr, "Authmap import: Corrupt authmap data\n");
memset(map, 0, sizeof(*map));
return -1;
}
}
return 0;
}
int import_authmap(struct sbot_authmap *map, const char *file)
{
FILE *fd;
int err;
printf("Importing authentication map...\n");
fd = fopen(file, "r");
if (!fd) {
fprintf(stderr, "Could not open authentication map %s: %s\n",
file, strerror(errno));
return -1;
}
err = do_import_authmap(map, fd);
if (err) {
fprintf(stderr, "Failed to parse authmap file \"%s\"\n",
file);
fclose(fd);
return -1;
}
fclose(fd);
return 0;
}
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