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am 60fd3fee: Migrate CA certificates to all users

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* commit '60fd3feecab4336d964ca8e31c7c3220e1afb558':
  Migrate CA certificates to all users
This commit is contained in:
Robin Lee 2014-10-15 23:25:00 +00:00 committed by Android Git Automerger
commit 91c395f6c3
3 changed files with 144 additions and 35 deletions
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75
cmds/installd/installd.c
View File

@ -511,52 +511,61 @@ int initialize_directories() {
if (version == 2) {
ALOGD("Upgrading to /data/misc/user directories");
char misc_dir[PATH_MAX];
snprintf(misc_dir, PATH_MAX, "%smisc", android_data_dir.path);
char keychain_added_dir[PATH_MAX];
snprintf(keychain_added_dir, PATH_MAX, "%s/keychain/cacerts-added", misc_dir);
char keychain_removed_dir[PATH_MAX];
snprintf(keychain_removed_dir, PATH_MAX, "%s/keychain/cacerts-removed", misc_dir);
DIR *dir;
struct dirent *dirent;
char user_data_dir[PATH_MAX];
dir = opendir(user_data_dir);
if (dir != NULL) {
while ((dirent = readdir(dir))) {
if (dirent->d_type == DT_DIR) {
const char *name = dirent->d_name;
const char *name = dirent->d_name;
// skip "." and ".."
if (name[0] == '.') {
if (name[1] == 0) continue;
if ((name[1] == '.') && (name[2] == 0)) continue;
// skip "." and ".."
if (name[0] == '.') {
if (name[1] == 0) continue;
if ((name[1] == '.') && (name[2] == 0)) continue;
}
uint32_t user_id = atoi(name);
// /data/misc/user/<user_id>
if (ensure_config_user_dirs(user_id) == -1) {
goto fail;
}
char misc_added_dir[PATH_MAX];
snprintf(misc_added_dir, PATH_MAX, "%s/user/%s/cacerts-added", misc_dir, name);
char misc_removed_dir[PATH_MAX];
snprintf(misc_removed_dir, PATH_MAX, "%s/user/%s/cacerts-removed", misc_dir, name);
uid_t uid = multiuser_get_uid(user_id, AID_SYSTEM);
gid_t gid = uid;
if (access(keychain_added_dir, F_OK) == 0) {
if (copy_dir_files(keychain_added_dir, misc_added_dir, uid, gid) != 0) {
ALOGE("Some files failed to copy");
}
// /data/misc/user/<user_id>
if (ensure_config_user_dirs(atoi(name)) == -1) {
goto fail;
}
if (access(keychain_removed_dir, F_OK) == 0) {
if (copy_dir_files(keychain_removed_dir, misc_removed_dir, uid, gid) != 0) {
ALOGE("Some files failed to copy");
}
}
}
closedir(dir);
}
// Just rename keychain files into user/0; they should already have the right permissions
char misc_dir[PATH_MAX];
char keychain_added_dir[PATH_MAX];
char keychain_removed_dir[PATH_MAX];
char config_added_dir[PATH_MAX];
char config_removed_dir[PATH_MAX];
snprintf(misc_dir, PATH_MAX, "%s/misc", android_data_dir.path);
snprintf(keychain_added_dir, PATH_MAX, "%s/keychain/cacerts-added", misc_dir);
snprintf(keychain_removed_dir, PATH_MAX, "%s/keychain/cacerts-removed", misc_dir);
snprintf(config_added_dir, PATH_MAX, "%s/user/0/cacerts-added", misc_dir);
snprintf(config_removed_dir, PATH_MAX, "%s/user/0/cacerts-removed", misc_dir);
if (access(keychain_added_dir, F_OK) == 0) {
if (rename(keychain_added_dir, config_added_dir) != 0) {
goto fail;
if (access(keychain_added_dir, F_OK) == 0) {
delete_dir_contents(keychain_added_dir, 1, 0);
}
}
if (access(keychain_removed_dir, F_OK) == 0) {
if (rename(keychain_removed_dir, config_removed_dir) != 0) {
goto fail;
if (access(keychain_removed_dir, F_OK) == 0) {
delete_dir_contents(keychain_removed_dir, 1, 0);
}
}

2
cmds/installd/installd.h
View File

@ -165,6 +165,8 @@ int delete_dir_contents(const char *pathname,
int delete_dir_contents_fd(int dfd, const char *name);
int copy_dir_files(const char *srcname, const char *dstname, uid_t owner, gid_t group);
int lookup_media_dir(char basepath[PATH_MAX], const char *dir);
int64_t data_disk_free();

102
cmds/installd/utils.c
View File

@ -324,6 +324,104 @@ int delete_dir_contents_fd(int dfd, const char *name)
return res;
}
static int _copy_owner_permissions(int srcfd, int dstfd)
{
struct stat st;
if (fstat(srcfd, &st) != 0) {
return -1;
}
if (fchmod(dstfd, st.st_mode) != 0) {
return -1;
}
return 0;
}
static int _copy_dir_files(int sdfd, int ddfd, uid_t owner, gid_t group)
{
int result = 0;
if (_copy_owner_permissions(sdfd, ddfd) != 0) {
ALOGE("_copy_dir_files failed to copy dir permissions\n");
}
if (fchown(ddfd, owner, group) != 0) {
ALOGE("_copy_dir_files failed to change dir owner\n");
}
DIR *ds = fdopendir(sdfd);
if (ds == NULL) {
ALOGE("Couldn't fdopendir: %s\n", strerror(errno));
return -1;
}
struct dirent *de;
while ((de = readdir(ds))) {
if (de->d_type != DT_REG) {
continue;
}
const char *name = de->d_name;
int fsfd = openat(sdfd, name, O_RDONLY | O_NOFOLLOW | O_CLOEXEC);
int fdfd = openat(ddfd, name, O_WRONLY | O_NOFOLLOW | O_CLOEXEC | O_CREAT, 0600);
if (fsfd == -1 || fdfd == -1) {
ALOGW("Couldn't copy %s: %s\n", name, strerror(errno));
} else {
if (_copy_owner_permissions(fsfd, fdfd) != 0) {
ALOGE("Failed to change file permissions\n");
}
if (fchown(fdfd, owner, group) != 0) {
ALOGE("Failed to change file owner\n");
}
char buf[8192];
ssize_t size;
while ((size = read(fsfd, buf, sizeof(buf))) > 0) {
write(fdfd, buf, size);
}
if (size < 0) {
ALOGW("Couldn't copy %s: %s\n", name, strerror(errno));
result = -1;
}
}
close(fdfd);
close(fsfd);
}
return result;
}
int copy_dir_files(const char *srcname,
const char *dstname,
uid_t owner,
uid_t group)
{
int res = 0;
DIR *ds = NULL;
DIR *dd = NULL;
ds = opendir(srcname);
if (ds == NULL) {
ALOGE("Couldn't opendir %s: %s\n", srcname, strerror(errno));
return -errno;
}
mkdir(dstname, 0600);
dd = opendir(dstname);
if (dd == NULL) {
ALOGE("Couldn't opendir %s: %s\n", dstname, strerror(errno));
closedir(ds);
return -errno;
}
int sdfd = dirfd(ds);
int ddfd = dirfd(dd);
if (sdfd != -1 && ddfd != -1) {
res = _copy_dir_files(sdfd, ddfd, owner, group);
} else {
res = -errno;
}
closedir(dd);
closedir(ds);
return res;
}
int lookup_media_dir(char basepath[PATH_MAX], const char *dir)
{
DIR *d;
@ -1019,8 +1117,8 @@ int ensure_config_user_dirs(userid_t userid) {
char path[PATH_MAX];
// writable by system, readable by any app within the same user
const int uid = (userid * AID_USER) + AID_SYSTEM;
const int gid = (userid * AID_USER) + AID_EVERYBODY;
const int uid = multiuser_get_uid(userid, AID_SYSTEM);
const int gid = multiuser_get_uid(userid, AID_EVERYBODY);
// Ensure /data/misc/user/<userid> exists
create_user_config_path(config_user_path, userid);