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
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
|
/* snac - A simple, minimalistic ActivityPub instance */
/* copyright (c) 2022 - 2025 grunfink et al. / MIT license */
#define XS_IMPLEMENTATION
#include "xs.h"
#include "xs_hex.h"
#include "xs_io.h"
#include "xs_unicode_tbl.h"
#include "xs_unicode.h"
#include "xs_json.h"
#include "xs_curl.h"
#include "xs_openssl.h"
#include "xs_socket.h"
#include "xs_unix_socket.h"
#include "xs_url.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 "xs_random.h"
#include "xs_match.h"
#include "xs_fcgi.h"
#include "xs_html.h"
#include "xs_po.h"
#include "snac.h"
#include <sys/time.h>
#include <sys/stat.h>
xs_str *srv_basedir = NULL;
xs_dict *srv_config = NULL;
xs_str *srv_baseurl = NULL;
xs_str *srv_proxy_token_seed = NULL;
xs_dict *srv_langs = NULL;
int dbglevel = 0;
int mkdirx(const char *pathname)
/* creates a directory with special permissions */
{
int ret;
if ((ret = mkdir(pathname, DIR_PERM)) != -1) {
/* try to the set the setgid bit, to allow system users
to create files in these directories using the
command-line tool. This may fail in some restricted
environments, but it's of no use there anyway */
chmod(pathname, DIR_PERM_ADD);
}
return ret;
}
int valid_status(int status)
/* is this HTTP status valid? */
{
return status >= 200 && status <= 299;
}
xs_str *tid(int offset)
/* returns a time-based Id */
{
struct timeval tv;
gettimeofday(&tv, NULL);
return xs_fmt("%010ld.%06ld", (long)tv.tv_sec + (long)offset, (long)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 */
{
if (!uid || *uid == '\0')
return 0;
while (*uid) {
if (!(isalnum(*uid) || *uid == '_'))
return 0;
uid++;
}
return 1;
}
void srv_log(xs_str *str)
/* logs a debug message */
{
if (xs_str_in(str, srv_basedir) != -1) {
/* replace basedir with ~ */
str = xs_replace_i(str, srv_basedir, "~");
}
xs *tm = xs_str_localtime(0, "%H:%M:%S");
fprintf(stderr, "%s %s\n", tm, str);
/* if the ~/log/ folder exists, also write to a file there */
xs *dt = xs_str_localtime(0, "%Y-%m-%d");
xs *lf = xs_fmt("%s/log/%s.log", srv_basedir, dt);
FILE *f;
if ((f = fopen(lf, "a")) != NULL) {
fprintf(f, "%s %s\n", tm, str);
fclose(f);
}
xs_free(str);
}
void snac_log(snac *snac, xs_str *str)
/* prints a user debugging information */
{
xs *o_str = str;
xs_str *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_log(msg);
}
xs_str *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) {
unsigned int r;
xs_rnd_buf(&r, sizeof(r));
d_nonce = xs_fmt("%08x", r);
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;
}
const char *http_status_text(int status)
/* translate status codes to canonical status texts */
{
switch (status) {
case 599: return "Timeout";
#define HTTP_STATUS(code, name, text) case HTTP_STATUS_ ## name: return #text;
#include "http_codes.h"
#undef HTTP_STATUS
default: return "Unknown";
}
}
|
