Makefile.in: switch from git-tar-tree to git-archive
[paraslash.git] / user_list.c
1 /*
2 * Copyright (C) 2006 Andre Noll <maan@systemlinux.org>
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
17 */
18
19 /** \file user_list.c user handling for para_server */
20
21 #include "para.h"
22 #include "error.h"
23 #include "fd.h"
24 #include "string.h"
25 #include "user_list.h"
26
27 static struct list_head user_list;
28
29 /*
30 * lookup user in user list file. Fills in a user struct containing
31 * filename of the user's public key as well as the permissions of that user.
32 * Returns 1 on success, 0 if user does not exist and < 0 on errors.
33 */
34 static void populate_user_list(char *user_list_file)
35 {
36 FILE *file_ptr = NULL;
37 char *char_ptr;
38 char line[MAXLINE];
39 /* keyword, user, key, perms */
40 char w[MAXLINE], n[MAXLINE], k[MAXLINE], p[MAXLINE], tmp[4][MAXLINE];
41 int num, ret;
42
43 file_ptr = fopen(user_list_file, "r");
44 ret = -E_USERLIST;
45 if (!file_ptr)
46 goto out;
47 for (;;) {
48 struct user *u;
49 ret = para_fgets(line, MAXLINE, file_ptr);
50 if (ret < 0)
51 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
52 if (ret <= 0)
53 break;
54 if (sscanf(line,"%200s %200s %200s %200s", w, n, k, p) < 3)
55 continue;
56 if (strcmp(w, "user"))
57 continue;
58 PARA_DEBUG_LOG("found entry for %s\n", n);
59 u = para_malloc(sizeof(struct user));
60 u->name = para_strdup(n);
61 u->rsa = para_malloc(sizeof(RSA));
62 ret = get_rsa_key(k, &u->rsa, LOAD_PUBLIC_KEY);
63 if (ret < 0)
64 break;
65 u->perms = 0;
66 char_ptr = p;
67 num = sscanf(char_ptr, "%200[A-Z_],%200[A-Z_],%200[A-Z_],%200[A-Z_]",
68 tmp[0], tmp[1], tmp[2], tmp[3]);
69 PARA_DEBUG_LOG("found %i perm entries\n", num);
70 u->perms = 0;
71 while (num > 0) {
72 num--;
73 if (!strcmp(tmp[num], "AFS_READ"))
74 u->perms |= AFS_READ;
75 else if (!strcmp(tmp[num], "AFS_WRITE"))
76 u->perms |= AFS_WRITE;
77 else if (!strcmp(tmp[num], "DB_READ"))
78 u->perms |= DB_READ;
79 else if (!strcmp(tmp[num], "DB_WRITE"))
80 u->perms |= DB_WRITE;
81 else /* unknown permission */
82 PARA_WARNING_LOG("unknown permission: %s\n",
83 tmp[num]);
84 }
85 para_list_add(&u->node, &user_list);
86 }
87 out:
88 if (file_ptr)
89 fclose(file_ptr);
90 if (ret >= 0)
91 return;
92 PARA_EMERG_LOG("%s\n", PARA_STRERROR(-ret));
93 exit(EXIT_FAILURE);
94 }
95
96 void init_user_list(char *user_list_file)
97 {
98 struct user *u, *tmp;
99 static int initialized;
100
101 if (initialized) {
102 list_for_each_entry_safe(u, tmp, &user_list, node) {
103 list_del(&u->node);
104 free(u->name);
105 free(u->rsa);
106 free(u);
107 }
108 } else
109 INIT_LIST_HEAD(&user_list);
110 initialized = 1;
111 populate_user_list(user_list_file);
112 }
113
114 /**
115 * lookup user in user_list.
116 *
117 * \param user: must initially contain the name of the user and is filled
118 * in by this function on success.
119 *
120 * \return 1 on success and < 0 on errors.
121 */
122 int lookup_user(struct user *user)
123 {
124 struct user *u;
125 list_for_each_entry(u, &user_list, node) {
126 if (strcmp(u->name, user->name))
127 continue;
128 *user = *u;
129 return 1;
130 }
131 return -E_BAD_USER;
132 }