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Add set-root-password command

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The `set-root-password` command sets up an alternate mount namespace
with a writable `/etc` directory and then runs `passwd` in it.  This
allows `passwd` to create its lock files and backup files, without
requiring that the real `/etc` to be mutable.  After `passwd` finishes
and has updated its private copy of `/etc/shadow`, the script rewrites
the real one with its contents.
This commit is contained in:
Dustin
2023-03-15 17:19:18 -05:00
parent eb8f4c3b40
commit 7c3738d067
4 changed files with 210 additions and 0 deletions
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65
repos/aimee-os/sec-policy/selinux-aimee-os/files/aimee-os.te
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@@ -23,6 +23,13 @@ type aimee_factory_reset_t;
type aimee_factory_reset_exec_t;
init_daemon_domain(aimee_factory_reset_t, aimee_factory_reset_exec_t)
type aimee_set_root_password_t;
type aimee_set_root_password_exec_t;
userdom_user_application_domain(aimee_set_root_password_t, aimee_set_root_password_exec_t)
type aimee_set_root_password_tmp_t;
files_tmp_file(aimee_set_root_password_tmp_t)
########################################
#
# init-storage local policy
@@ -198,6 +205,64 @@ fstools_manage_runtime_files(aimee_factory_reset_t)
miscfiles_read_localization(aimee_factory_reset_t)
storage_raw_rw_fixed_disk(aimee_factory_reset_t)
########################################
#
# set-root-password local policy
#
gen_require(`
class passwd { passwd };
')
allow aimee_set_root_password_t self:capability { sys_admin };
allow aimee_set_root_password_t self:fifo_file rw_fifo_file_perms;
allow aimee_set_root_password_t self:process setfscreate;
allow aimee_set_root_password_t self:process { ptrace sigkill sigstop signal };
allow aimee_set_root_password_t self:passwd passwd;
files_tmp_filetrans(aimee_set_root_password_t, aimee_set_root_password_tmp_t, dir)
manage_dirs_pattern(aimee_set_root_password_t, aimee_set_root_password_tmp_t, aimee_set_root_password_tmp_t)
manage_files_pattern(aimee_set_root_password_t, aimee_set_root_password_tmp_t, aimee_set_root_password_tmp_t)
relabel_files_pattern(aimee_set_root_password_t, aimee_set_root_password_tmp_t, aimee_set_root_password_tmp_t)
domain_use_interactive_fds(aimee_set_root_password_t)
userdom_use_inherited_user_terminals(aimee_set_root_password_t)
userdom_search_user_home_dirs(aimee_set_root_password_t)
corecmd_exec_bin(aimee_set_root_password_t)
selinux_get_fs_mount(aimee_set_root_password_t)
seutil_read_config(aimee_set_root_password_t)
miscfiles_read_localization(aimee_set_root_password_t)
files_mounton_root(aimee_set_root_password_t)
aimee_os_set_root_password_exec(aimee_set_root_password_t)
mount_list_runtime(aimee_set_root_password_t)
fs_getattr_all_fs(aimee_set_root_password_t)
fs_mount_all_fs(aimee_set_root_password_t)
fs_unmount_all_fs(aimee_set_root_password_t)
files_read_var_lib_files(aimee_set_root_password_t)
files_manage_etc_files(aimee_set_root_password_t)
files_relabel_etc_files(aimee_set_root_password_t)
files_manage_etc_dirs(aimee_set_root_password_t)
auth_manage_shadow(aimee_set_root_password_t)
auth_relabel_shadow(aimee_set_root_password_t)
files_mounton_etc_dirs(aimee_set_root_password_t)
usermanage_domtrans_passwd(aimee_set_root_password_t)
dev_read_sysfs(aimee_set_root_password_t)
aimee_os_manage_set_root_password_tmp_files(aimee_set_root_password_t)
gen_require(`
type mount_t;
type passwd_t;
')
allow aimee_set_root_password_t aimee_set_root_password_tmp_t:dir mounton;
allow mount_t aimee_set_root_password_tmp_t:dir mounton;
aimee_os_manage_set_root_password_tmp_files(passwd_t)
gen_require(`
type sysadm_t;
role sysadm_r;
')
aimee_os_run_set_root_password(sysadm_t, sysadm_r)
########################################
#
# Additional policy rules for Aimee OS-specific behavior