1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
|
/* snac - A simple, minimalistic ActivityPub instance */
/* copyright (c) 2022 - 2023 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 "xs_set.h"
#include "xs_time.h"
#include "xs_glob.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;
int mkdirx(const char *pathname)
/* creates a directory with special permissions */
{
int ret;
if ((ret = mkdir(pathname, DIR_PERM)) != -1)
ret = chmod(pathname, DIR_PERM);
return ret;
}
int valid_status(int status)
/* is this HTTP status valid? */
{
return status >= 200 && status <= 299;
}
d_char *tid(int offset)
/* returns a time-based Id */
{
struct timeval tv;
gettimeofday(&tv, NULL);
return xs_fmt("%10d.%06d", tv.tv_sec + offset, tv.tv_usec);
}
double ftime(void)
/* returns the UNIX time as a float */
{
xs *ntid = tid(0);
return atof(ntid);
}
int validate_uid(const 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 */
{
if (xs_str_in(str, srv_basedir) != -1) {
/* replace basedir with ~ */
str = xs_replace_i(str, srv_basedir, "~");
}
if (dbglevel >= level) {
xs *tm = xs_str_localtime(0, "%H:%M:%S");
fprintf(stderr, "%s %s\n", tm, str);
}
xs_free(str);
}
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(const char *uid, const char *passwd, const char *nonce)
/* hashes a password */
{
xs *d_nonce = NULL;
xs *combi;
xs *hash;
if (nonce == NULL) {
d_nonce = xs_fmt("%08x", random());
nonce = d_nonce;
}
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(const char *uid, const char *passwd, const 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;
}
|
