+/*
+ * lookup user in user_list file. Fills in a user struct containing
+ * filename of the user's public key as well as the permissions of that user.
+ * Returns 1 on success, 0 if user does not exist and < 0 on errors.
+ */
+static void populate_user_list(void) {
+ FILE *file_ptr = NULL;
+ char *char_ptr;
+ char line[MAXLINE];
+ /* keyword, user, key, perms */
+ char w[MAXLINE], n[MAXLINE], k[MAXLINE], p[MAXLINE], tmp[4][MAXLINE];
+ int num, ret;
+
+ file_ptr = fopen(user_list, "r");
+ ret = -E_USERLIST;
+ if (!file_ptr)
+ goto out;
+ for (;;) {
+ struct _user *u;
+ ret = para_fgets(line, MAXLINE, file_ptr);
+ if (ret < 0)
+ PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
+ if (ret <= 0)
+ break;
+ if (sscanf(line,"%200s %200s %200s %200s", w, n, k, p) < 3)
+ continue;
+ if (strcmp(w, "user"))
+ continue;
+ PARA_DEBUG_LOG("found entry for %s\n", n);
+ u = para_malloc(sizeof(struct _user));
+ u->name = para_strdup(n);
+ u->rsa = para_malloc(sizeof(RSA));
+ ret = get_rsa_key(k, &u->rsa, 0 /* public */);
+ if (ret < 0)
+ break;
+ u->perms = 0;
+ char_ptr = p;
+ num = sscanf(char_ptr, "%200[A-Z_],%200[A-Z_],%200[A-Z_],%200[A-Z_]",
+ tmp[0], tmp[1], tmp[2], tmp[3]);
+ PARA_DEBUG_LOG("found %i perm entries\n", num);
+ u->perms = 0;
+ while (num > 0) {
+ num--;
+ if (!strcmp(tmp[num], "AFS_READ"))
+ u->perms |= AFS_READ;
+ else if (!strcmp(tmp[num], "AFS_WRITE"))
+ u->perms |= AFS_WRITE;
+ else if (!strcmp(tmp[num], "DB_READ"))
+ u->perms |= DB_READ;
+ else if (!strcmp(tmp[num], "DB_WRITE"))
+ u->perms |= DB_WRITE;
+ else /* unknown permission */
+ PARA_WARNING_LOG("unknown permission: %s\n",
+ tmp[num]);
+ }
+ para_list_add(&u->node, &_user_list);
+ }
+out:
+ if (file_ptr)
+ fclose(file_ptr);
+ if (ret >= 0)
+ return;
+ PARA_EMERG_LOG("%s\n", PARA_STRERROR(-ret));
+ exit(EXIT_FAILURE);
+}
+
+static void init_user_list(void)
+{
+ struct _user *u, *tmp;
+ static int initialized;
+
+ if (initialized) {
+ list_for_each_entry_safe(u, tmp, &_user_list, node) {
+ list_del(&u->node);
+ free(u->name);
+ free(u->rsa);
+ free(u);
+ }
+ } else
+ INIT_LIST_HEAD(&_user_list);
+ initialized = 1;
+ populate_user_list();
+}
+
+/**
+ * lookup user in user_list.
+ *
+ * \param user: must initially contain the name of the user and is filled
+ * in by this function on success.
+ *
+ * \return 1 on success and < 0 on errors.
+ */
+int _get_user(struct _user *user)
+{
+ struct _user *u;
+ list_for_each_entry(u, &_user_list, node) {
+ if (strcmp(u->name, user->name))
+ continue;
+ *user = *u;
+ return 1;
+ }
+ return -E_BAD_USER;
+}
+