Add a .gitignore file.
[paraslash.git] / user_list.c
1 /*
2 * Copyright (C) 2006-2007 Andre Noll <maan@systemlinux.org>
3 *
4 * Licensed under the GPL v2. For licencing details see COPYING.
5 */
6
7 /** \file user_list.c user handling for para_server */
8
9 #include "para.h"
10 #include "error.h"
11 #include "fd.h"
12 #include "string.h"
13 #include "list.h"
14 #include "user_list.h"
15
16 static struct list_head user_list;
17
18 /*
19 * lookup user in user list file. Fills in a user struct containing
20 * filename of the user's public key as well as the permissions of that user.
21 * Returns 1 on success, 0 if user does not exist and < 0 on errors.
22 */
23 static void populate_user_list(char *user_list_file)
24 {
25 FILE *file_ptr = NULL;
26 char *char_ptr;
27 char line[MAXLINE];
28 /* keyword, user, key, perms */
29 char w[MAXLINE], n[MAXLINE], k[MAXLINE], p[MAXLINE], tmp[4][MAXLINE];
30 int num, ret;
31
32 file_ptr = fopen(user_list_file, "r");
33 ret = -E_USERLIST;
34 if (!file_ptr)
35 goto out;
36 for (;;) {
37 struct user *u;
38 ret = para_fgets(line, MAXLINE, file_ptr);
39 if (ret < 0)
40 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
41 if (ret <= 0)
42 break;
43 if (sscanf(line,"%200s %200s %200s %200s", w, n, k, p) < 3)
44 continue;
45 if (strcmp(w, "user"))
46 continue;
47 PARA_DEBUG_LOG("found entry for %s\n", n);
48 u = para_malloc(sizeof(struct user));
49 u->name = para_strdup(n);
50 ret = get_rsa_key(k, &u->rsa, LOAD_PUBLIC_KEY);
51 if (ret < 0)
52 break;
53 char_ptr = p;
54 num = sscanf(char_ptr, "%200[A-Z_],%200[A-Z_],%200[A-Z_],%200[A-Z_]",
55 tmp[0], tmp[1], tmp[2], tmp[3]);
56 PARA_DEBUG_LOG("found %i perm entries\n", num);
57 u->perms = 0;
58 while (num > 0) {
59 num--;
60 if (!strcmp(tmp[num], "VSS_READ"))
61 u->perms |= VSS_READ;
62 else if (!strcmp(tmp[num], "VSS_WRITE"))
63 u->perms |= VSS_WRITE;
64 else if (!strcmp(tmp[num], "AFS_READ"))
65 u->perms |= AFS_READ;
66 else if (!strcmp(tmp[num], "AFS_WRITE"))
67 u->perms |= AFS_WRITE;
68 else /* unknown permission */
69 PARA_WARNING_LOG("ignoring unknown permission: %s\n",
70 tmp[num]);
71 }
72 para_list_add(&u->node, &user_list);
73 }
74 out:
75 if (file_ptr)
76 fclose(file_ptr);
77 if (ret >= 0)
78 return;
79 PARA_EMERG_LOG("%s\n", PARA_STRERROR(-ret));
80 exit(EXIT_FAILURE);
81 }
82
83 /**
84 * initialize the list of users allowed to connecto to para_server
85 *
86 * \param user_list_file the file containing access information
87 *
88 * If this function is called a second time, the contents of the
89 * previous call are discarded.
90 */
91 void init_user_list(char *user_list_file)
92 {
93 struct user *u, *tmp;
94 static int initialized;
95
96 if (initialized) {
97 list_for_each_entry_safe(u, tmp, &user_list, node) {
98 list_del(&u->node);
99 free(u->name);
100 rsa_free(u->rsa);
101 free(u);
102 }
103 } else
104 INIT_LIST_HEAD(&user_list);
105 initialized = 1;
106 populate_user_list(user_list_file);
107 }
108
109 /**
110 * lookup user in user_list.
111 *
112 * \param name of the user
113 *
114 * \return a pointer to the corresponding user struct if the user was found,
115 * \p NULL otherwise.
116 */
117 struct user *lookup_user(const char *name)
118 {
119 struct user *u;
120 list_for_each_entry(u, &user_list, node) {
121 if (strcmp(u->name, name))
122 continue;
123 return u;
124 }
125 return NULL;
126 }