/*
- Copyright 2015 IoT.bzh
+ Copyright 2015, 2016, 2017 IoT.bzh
+
+ author: José Bollo <jose.bollo@iot.bzh>
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
limitations under the License.
*/
-#define _BSD_SOURCE /* see readdir */
+#define _GNU_SOURCE
-#include <stdlib.h>
-#include <stdio.h>
-#include <dirent.h>
-#include <unistd.h>
#include <limits.h>
#include <errno.h>
-#include <syslog.h>
+#include <string.h>
+#include <ctype.h>
+#include <assert.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <sys/stat.h>
-#include "wgtpkg.h"
+#include "verbose.h"
+#include "wgt.h"
+#include "wgt-info.h"
+#include "wgt-strings.h"
+#include "wgtpkg-files.h"
+#include "wgtpkg-workdir.h"
+#include "wgtpkg-zip.h"
+#include "wgtpkg-permissions.h"
+#include "wgtpkg-digsig.h"
+#include "wgtpkg-install.h"
+#include "secmgr-wrap.h"
+#include "utils-dir.h"
-/* install the widget of the file */
-static void install(const char *wgtfile)
+static const char* exec_type_strings[] = {
+ "application/x-executable",
+ "application/vnd.agl.native"
+};
+
+static int check_defined(const void *data, const char *name)
{
- notice("-- INSTALLING widget %s", wgtfile);
+ if (data)
+ return 0;
+ ERROR("widget has no defined '%s' (temporary constraints)", name);
+ errno = EINVAL;
+ return -1;
+}
- if (enter_workdir(1))
- goto error;
+static int check_valid_string(const char *value, const char *name)
+{
+ int pos;
+ char c;
- if (zread(wgtfile, 0))
- goto error;
+ if (check_defined(value, name))
+ return -1;
+ pos = 0;
+ c = value[pos];
+ if (c == 0) {
+ ERROR("empty string forbidden in '%s' (temporary constraints)", name);
+ errno = EINVAL;
+ return -1;
+ }
+ do {
+ if (!isalnum(c) && !strchr(".-_", c)) {
+ ERROR("forbidden char %c in '%s' -> '%s' (temporary constraints)", c, name, value);
+ errno = EINVAL;
+ return -1;
+ }
+ c = value[++pos];
+ } while(c);
+ return 0;
+}
- if (check_all_signatures())
- goto error;
+static int check_temporary_constraints(const struct wgt_desc *desc)
+{
+ int result;
- return;
+ result = check_valid_string(desc->id, "id");
+ result |= check_valid_string(desc->version, "version");
+ result |= check_valid_string(desc->ver, "ver");
+ result |= check_defined(desc->icons, "icon");
+ result |= check_defined(desc->content_src, "content");
+ if (result)
+ return result;
-error:
- return;
- exit(1);
+ if (desc->icons->next) {
+ ERROR("widget has more than one icon defined (temporary constraints)");
+ errno = EINVAL;
+ result = -1;
+ }
+ return 0;
+}
+
+static int set_required_permissions(struct wgt_desc_param *params, int required)
+{
+ int optional;
+
+ while (params) {
+ /* check the value */
+ if (!strcmp(params->value, string_required))
+ optional = !required;
+ else if (!strcmp(params->value, string_optional))
+ optional = 1;
+ else {
+ ERROR("unexpected parameter value: %s found for %s", params->value, params->name);
+ errno = EPERM;
+ return -1;
+ }
+ /* set the permission */
+ if (request_permission(params->name)) {
+ DEBUG("granted permission: %s", params->name);
+ } else if (optional) {
+ INFO("optional permission ungranted: %s", params->name);
+ } else {
+ ERROR("ungranted permission required: %s", params->name);
+ errno = EPERM;
+ return -1;
+ }
+ params = params->next;
+ }
+ return 0;
+}
+
+static int check_widget(const struct wgt_desc *desc)
+{
+ int result;
+ const struct wgt_desc_feature *feature;
+
+ result = check_temporary_constraints(desc);
+ feature = desc->features;
+ while(result >= 0 && feature) {
+ if (!strcmp(feature->name, feature_required_permission))
+ result = set_required_permissions(feature->params, feature->required);
+ feature = feature->next;
+ }
+ return result;
+}
+
+static int get_target_directory(char target[PATH_MAX], const char *root, const struct wgt_desc *desc)
+{
+ int rc;
+
+ rc = snprintf(target, PATH_MAX, "%s/%s/%s", root, desc->id, desc->ver);
+ if (rc < PATH_MAX)
+ rc = 0;
+ else {
+ ERROR("path too long");
+ errno = EINVAL;
+ rc = -1;
+ }
+ return rc;
+}
+
+static int move_widget_to(const char *destdir, int force)
+{
+ return move_workdir(destdir, 1, force);
}
-/* install the widgets of the list */
-int main(int ac, char **av)
+static int install_icon(const struct wgt_desc *desc)
{
- int i, kwd;
+ char link[PATH_MAX];
+ char target[PATH_MAX];
+ int rc;
+
+ create_directory(FWK_ICON_DIR, 0755, 1);
+ rc = snprintf(link, sizeof link, "%s/%s", FWK_ICON_DIR, desc->idaver);
+ if (rc >= (int)sizeof link) {
+ ERROR("link too long in install_icon");
+ errno = EINVAL;
+ return -1;
+ }
- openlog("wgtpkg-install", LOG_PERROR, LOG_AUTH);
+ rc = snprintf(target, sizeof target, "%s/%s", workdir, desc->icons->src);
+ if (rc >= (int)sizeof target) {
+ ERROR("target too long in install_icon");
+ errno = EINVAL;
+ return -1;
+ }
- xmlsec_init();
+ unlink(link);
+ rc = symlink(target, link);
+ if (rc)
+ ERROR("can't create link %s -> %s", link, target);
+ return rc;
+}
- ac = verbose_scan_args(ac, av);
-
- /* canonic names for files */
- for (i = 1 ; av[i] != NULL ; i++)
- if ((av[i] = realpath(av[i], NULL)) == NULL) {
- syslog(LOG_ERR, "error while getting realpath of %dth argument", i);
- return 1;
+static int install_exec_flag(const struct wgt_desc *desc)
+{
+ int i;
+
+ if (desc->content_type) {
+ i = sizeof exec_type_strings / sizeof *exec_type_strings;
+ while (i) {
+ if (!strcasecmp(desc->content_type, exec_type_strings[--i]))
+ return fchmodat(workdirfd, desc->content_src, 0755, 0);
}
+ }
+ return 0;
+}
+
+static int install_security(const struct wgt_desc *desc)
+{
+ char path[PATH_MAX], *head;
+ const char *icon, *perm;
+ int rc;
+ unsigned int i, n, len, lic, lf;
+ struct filedesc *f;
+
+ rc = secmgr_init(desc->id);
+ if (rc)
+ goto error;
+
+ rc = secmgr_path_public_read_only(workdir);
+ if (rc)
+ goto error2;
+
+ /* instal the files */
+ head = stpcpy(path, workdir);
+ assert(head < path + sizeof path);
+ len = (unsigned)((path + sizeof path) - head);
+ if (!len) {
+ ERROR("root path too long in install_security");
+ errno = ENAMETOOLONG;
+ goto error2;
+ }
+ len--;
+ *head++ = '/';
+ icon = desc->icons->src;
+ lic = (unsigned)strlen(icon);
+ n = file_count();
+ i = 0;
+ while(i < n) {
+ f = file_of_index(i++);
+ lf = (unsigned)strlen(f->name);
+ if (lf >= len) {
+ ERROR("path too long in install_security");
+ errno = ENAMETOOLONG;
+ goto error2;
+ }
+ strcpy(head, f->name);
+ if (lf <= lic && !memcmp(f->name, icon, lf) && (!f->name[lf] || f->name[lf] == '/'))
+ rc = secmgr_path_public_read_only(path);
+ else
+ rc = secmgr_path_read_only(path);
+ if (rc)
+ goto error2;
+ }
+
+ /* install the permissions */
+ perm = first_usable_permission();
+ while(perm) {
+ rc = secmgr_permit(perm);
+ INFO("permitting %s %s", perm, rc ? "FAILED!" : "success");
+ if (rc)
+ goto error2;
+ perm = next_usable_permission();
+ }
+
+ rc = secmgr_install();
+ return rc;
+error2:
+ secmgr_cancel();
+error:
+ return -1;
+}
+
+/* install the widget of the file */
+struct wgt_info *install_widget(const char *wgtfile, const char *root, int force)
+{
+ struct wgt_info *ifo;
+ const struct wgt_desc *desc;
+ char installdir[PATH_MAX];
+
+ NOTICE("-- INSTALLING widget %s to %s --", wgtfile, root);
/* workdir */
- kwd = 1;
- if (make_workdir(kwd)) {
- syslog(LOG_ERR, "failed to create a working directory");
- return 1;
+ create_directory(root, 0755, 1);
+ if (make_workdir(root, "TMP", 0)) {
+ ERROR("failed to create a working directory");
+ goto error1;
}
- if (!kwd)
- atexit(remove_workdir);
- /* install widgets */
- for (av++ ; *av ; av++)
- install(*av);
+ if (zread(wgtfile, 0))
+ goto error2;
- exit(0);
- return 0;
+ if (check_all_signatures())
+ goto error2;
+
+ ifo = wgt_info_createat(workdirfd, NULL, 1, 1, 1);
+ if (!ifo)
+ goto error2;
+
+ reset_requested_permissions();
+ desc = wgt_info_desc(ifo);
+ if (check_widget(desc))
+ goto error3;
+
+ if (get_target_directory(installdir, root, desc))
+ goto error3;
+
+ if (move_widget_to(installdir, force))
+ goto error3;
+
+ if (install_icon(desc))
+ goto error3;
+
+ if (install_exec_flag(desc))
+ goto error3;
+
+ if (install_security(desc))
+ goto error3;
+
+ file_reset();
+ return ifo;
+
+error3:
+ wgt_info_unref(ifo);
+
+error2:
+ remove_workdir();
+
+error1:
+ file_reset();
+ return NULL;
}