chiark / gitweb /
register/confirm commands, and tests, and docs
[disorder] / clients / authorize.c
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460b9539 1/*
2 * This file is part of DisOrder
318ad6a8 3 * Copyright (C) 2005, 2007 Richard Kettlewell
460b9539 4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
18 * USA
19 */
20
21#include <config.h>
22#include "types.h"
23
24#include <pwd.h>
25#include <gcrypt.h>
26#include <errno.h>
27#include <unistd.h>
28#include <sys/stat.h>
29#include <fcntl.h>
30#include <stdio.h>
31
f0feb22e 32#include "client.h"
460b9539 33#include "authorize.h"
34#include "log.h"
35#include "configuration.h"
36#include "printf.h"
37#include "hex.h"
38
f0feb22e
RK
39/** @brief Create a DisOrder login for the calling user, called @p user
40 * @param client DisOrder client
e86021e4 41 * @param user Username to create (UTF-8)
f0feb22e
RK
42 * @return 0 on success, non-0 on error
43 */
44int authorize(disorder_client *client, const char *user) {
460b9539 45 uint8_t pwbin[10];
46 const struct passwd *pw, *jbpw;
47 gid_t jbgid;
48 char *c, *t, *pwhex;
49 int fd;
50 FILE *fp;
51
52 if(!(jbpw = getpwnam(config->user)))
53 fatal(0, "cannot find user %s", config->user);
54 jbgid = jbpw->pw_gid;
55 if(!(pw = getpwnam(user)))
56 fatal(0, "no such user as %s", user);
57 if((c = config_userconf(0, pw)) && access(c, F_OK) == 0) {
58 error(0, "%s already exists", c);
59 return -1;
60 }
61 if((c = config_usersysconf(pw)) && access(c, F_OK) == 0) {
62 error(0, "%s already exists", c);
63 return -1;
64 }
65 byte_xasprintf(&t, "%s.new", c);
66 gcry_randomize(pwbin, sizeof pwbin, GCRY_STRONG_RANDOM);
67 pwhex = hex(pwbin, sizeof pwbin);
68
318ad6a8 69 /* create config.USER, to end up with mode 400 user:<anything> */
460b9539 70 if((fd = open(t, O_WRONLY|O_CREAT|O_EXCL, 0600)) < 0)
71 fatal(errno, "error creating %s", t);
72 if(fchown(fd, pw->pw_uid, -1) < 0)
73 fatal(errno, "error chowning %s", t);
74 if(fchmod(fd, 0400) < 0)
75 fatal(errno, "error chmoding %s", t);
76 if(!(fp = fdopen(fd, "w")))
77 fatal(errno, "error calling fdopen");
78 if(fprintf(fp, "password %s\n", pwhex) < 0
79 || fclose(fp) < 0)
80 fatal(errno, "error writing to %s", t);
81 if(rename(t, c) < 0)
82 fatal(errno, "error renaming %s to %s", t, c);
83
f0feb22e
RK
84 /* create the user on the server */
85 if(disorder_adduser(client, user, pwhex))
86 return -1;
87
460b9539 88 return 0;
89}
90
91/*
92Local Variables:
93c-basic-offset:2
94comment-column:40
95fill-column:79
96indent-tabs-mode:nil
97End:
98*/