chiark / gitweb /
make client.c return status code on error
[disorder] / clients / authorize.c
CommitLineData
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)
0f55e905 42 * @param rights Initial rights or NULL for default
f0feb22e
RK
43 * @return 0 on success, non-0 on error
44 */
0f55e905 45int authorize(disorder_client *client, const char *user, const char *rights) {
460b9539 46 uint8_t pwbin[10];
47 const struct passwd *pw, *jbpw;
48 gid_t jbgid;
49 char *c, *t, *pwhex;
50 int fd;
51 FILE *fp;
52
53 if(!(jbpw = getpwnam(config->user)))
54 fatal(0, "cannot find user %s", config->user);
55 jbgid = jbpw->pw_gid;
56 if(!(pw = getpwnam(user)))
57 fatal(0, "no such user as %s", user);
58 if((c = config_userconf(0, pw)) && access(c, F_OK) == 0) {
59 error(0, "%s already exists", c);
60 return -1;
61 }
62 if((c = config_usersysconf(pw)) && access(c, F_OK) == 0) {
63 error(0, "%s already exists", c);
64 return -1;
65 }
66 byte_xasprintf(&t, "%s.new", c);
67 gcry_randomize(pwbin, sizeof pwbin, GCRY_STRONG_RANDOM);
68 pwhex = hex(pwbin, sizeof pwbin);
69
318ad6a8 70 /* create config.USER, to end up with mode 400 user:<anything> */
460b9539 71 if((fd = open(t, O_WRONLY|O_CREAT|O_EXCL, 0600)) < 0)
72 fatal(errno, "error creating %s", t);
73 if(fchown(fd, pw->pw_uid, -1) < 0)
74 fatal(errno, "error chowning %s", t);
75 if(fchmod(fd, 0400) < 0)
76 fatal(errno, "error chmoding %s", t);
77 if(!(fp = fdopen(fd, "w")))
78 fatal(errno, "error calling fdopen");
79 if(fprintf(fp, "password %s\n", pwhex) < 0
80 || fclose(fp) < 0)
81 fatal(errno, "error writing to %s", t);
82 if(rename(t, c) < 0)
83 fatal(errno, "error renaming %s to %s", t, c);
84
f0feb22e 85 /* create the user on the server */
0f55e905 86 if(disorder_adduser(client, user, pwhex, rights))
f0feb22e
RK
87 return -1;
88
460b9539 89 return 0;
90}
91
92/*
93Local Variables:
94c-basic-offset:2
95comment-column:40
96fill-column:79
97indent-tabs-mode:nil
98End:
99*/