The "-r" flag of sefcontext_compile now causes it to omit the
precompiled regular expressions from the output.
Signed-off-by: Janis Danisevskis <jdanis@android.com>
Adds the "-i" flag, which prints the version and
architecture identifier of the regular expression back end.
Signed-off-by: Janis Danisevskis <jdanis@android.com>
Serialized precompiled regular expressins are architecture
dependent when using PCRE2. This patch
- bumps the SELINUX_COMPILED_FCONTEXT version to 5 and
- adds a field to the output indicating the architecture
compatibility.
libselinux can cope with an architecture mismatch by
ignoring the precompiled data in the input file and recompiling
the regular expressions at runtime. It can also load older
versions of file_contexts.bin if they where built with
sefcontext_compile using the exact same version of the
pcre1/2 as selinux.
Signed-off-by: Janis Danisevskis <jdanis@android.com>
sefcontext_compile was failing silently on various error paths.
Generate a suitable error message to stderr for each error.
Before:
$ sefcontext_compile /path/to/unwritabledirectory/file_contexts
<no output, although non-zero exit status>
After:
$ sefcontext_compile /path/to/unwritabledirectory/file_contexts
sefcontext_compile: mkstemp /path/to/unwritabledirectory/file_contexts.binNmQJqa failed: Permission denied
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
On Android, certain discrepancies arise for unused functionality or
for dealing with the differences in Bionic libc. This patch includes
all the "ifdef'ing" required and introduces the BUILD_HOST define.
The BUILD_HOST define removes functionality not needed when building
libselinux for the Android build host machine.
Note that not all the libselinux src files are used to build
the host and target libraries on Android.
Change-Id: I7984e7b769c4dfa627d6cf311411fa2c93bb7ef7
Signed-off-by: William Roberts <william.c.roberts@intel.com>
On Android for both the host build, and the target, certain
backends are not needed:
- X Backend
- DB Backend
- Media Backend
Introduce the following defines for removing them from the
built library:
- NO_X_BACKEND
- NO_DB_BACKEND
- NO_MEDIA_BACKEND
When configured with these options and an attempt
is made to use them, selabel_open() will return
ENOTSUP.
Signed-off-by: William Roberts <william.c.roberts@intel.com>
This patch adds a new selinux_restorecon_xattr(3) function to find
and/or remove security.restorecon_last entries added by setfiles(8)
or restorecon(8).
Also review and update the man pages.
Signed-off-by: Richard Haines <richard_c_haines@btinternet.com>
When building libselinux with gcc and many warning flags, the build
fails with the following errors:
selinux_restorecon.c: In function ‘selinux_restorecon’:
selinux_restorecon.c:784:36: error: comparison between signed and
unsigned integer expressions [-Werror=sign-compare]
if (!flags.ignore_digest && size == fc_digest_len &&
^~
selabel_digest.c: In function ‘main’:
selabel_digest.c:162:16: error: comparison between signed and
unsigned integer expressions [-Werror=sign-compare]
for (i = 0; i < digest_len; i++)
^
selabel_digest.c:173:17: error: comparison between signed and
unsigned integer expressions [-Werror=sign-compare]
for (i = 0; i < num_specfiles; i++) {
^
clang reports the precise type information of the variables:
selinux_restorecon.c:784:36: error: comparison of integers of
different signs: 'ssize_t' (aka 'long') and 'size_t' (aka 'unsigned
long') [-Werror,-Wsign-compare]
if (!flags.ignore_digest && size == fc_digest_len &&
~~~~ ^ ~~~~~~~~~~~~~
selabel_digest.c:162:16: error: comparison of integers of different
signs: 'int' and 'size_t' (aka 'unsigned long')
[-Werror,-Wsign-compare]
for (i = 0; i < digest_len; i++)
~ ^ ~~~~~~~~~~
selabel_digest.c:173:17: error: comparison of integers of different
signs: 'int' and 'size_t' (aka 'unsigned long')
[-Werror,-Wsign-compare]
for (i = 0; i < num_specfiles; i++) {
~ ^ ~~~~~~~~~~~~~
Silent the warnings by using size_t where appropriate.
Signed-off-by: Nicolas Iooss <nicolas.iooss@m4x.org>
Nothing was being used from the stdio_ext.h header file, so
remove it. Additionally, Mac builds, required for the
Android build, do not have this header.
Change-Id: Ic61c87fcda79ffebeef93a20a2b3802f048bb0b0
Signed-off-by: William Roberts <william.c.roberts@intel.com>
Drop the check for selinux_enabled() on logging. The
caller can silence the logs by setting the logging
callback and discarding the messages.
Change-Id: Ia6769ef7ad8cc2144ad2bb73e5bf7c76ebfe487b
Signed-off-by: William Roberts <william.c.roberts@intel.com>
_D_ALLOC_NAMLEN is not very portable. Currently, the code
mallocs based on _D_ALLOC_NAMLEN() and then strcpy's dirent
d_name into the buffer. Instead, just use strdup.
Change-Id: I5c8ca47da2c593ea2726caba5781f5e9d9d910ae
Signed-off-by: William Roberts <william.c.roberts@intel.com>
The file will initially contain:
run_init=run_init_t
There can not be any spaces around the = since OpenRC's existing config
files and the methods it uses require it.
Signed-off-by: Jason Zaman <jason@perfinion.com>
When the Kernel UAPI header is present, this error occurs:
external/selinux/libselinux/src/policy.h:7:9: warning: 'XATTR_NAME_SELINUX' macro redefined [-Wmacro-redefined]
\#define XATTR_NAME_SELINUX "security.selinux"
^
bionic/libc/kernel/uapi/linux/xattr.h:52:9: note: previous definition is here
\#define XATTR_NAME_SELINUX XATTR_SECURITY_PREFIX XATTR_SELINUX_SUFFIX
Just use the kernel UAPI version on that case.
Change-Id: I1b2d34e463477adaec227ac8c3364f1b9d49e997
Signed-off-by: William Roberts <william.c.roberts@intel.com>
Hide or remove symbols that should not be public.
All uses of obj_class_compat were removed by
commit 76913d8adb
("Deprecate use of flask.h and av_permissions.h")
and it never should have been public regardless,
so remove it.
myprintf is used by matchpathcon internally but should
not be public, so hide it.
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
patch 5e15a52aaa cleans up the process_file() routine,
but introduced a bug. If the binary file cannot be
opened, always attempt to fall back to the textual file,
this was not occurring.
The logic should be:
1. Open the newest file between base path + suffix and
base_path + suffix + ".bin"
2. If anything fails, attempt to load the oldest file.
The result, with a concrete example, would be:
If file_contexts is the newest file, and it cannot be
processed, the code will fall back to file_contexts.bin
and vice versa.
Signed-off-by: William Roberts <william.c.roberts@intel.com>
This patch moves all pcre1/2 dependencies into the new files regex.h
and regex.c implementing the common denominator of features needed
by libselinux. The compiler flag -DUSE_PCRE2 toggles between the
used implementations.
As of this patch libselinux supports either pcre or pcre2 but not
both at the same time. The persistently stored file contexts
information differs. This means libselinux can only load file
context files generated by sefcontext_compile build with the
same pcre variant.
Also, for pcre2 the persistent format is architecture dependent.
Stored precompiled regular expressions can only be used on the
same architecture they were generated on. If pcre2 is used,
sefcontext_compile now respects the "-r". This flag makes
sefcontext_compile include the precompiled regular expressions
in the output file. The default is to omit them, so that the
output remains portable at the cost of having to recompile
the regular expressions at load time, or rather on first use.
Signed-off-by: Janis Danisevskis <jdanis@google.com>
The current process_file() code will open the file
twice on the case of a binary file, correct this.
The general flow through process_file() was a bit
difficult to read, streamline the routine to be
more readable.
Detailed statistics of before and after:
Source lines of code reported by cloc on modified files:
before: 735
after: 742
Object size difference:
before: 195530 bytes
after: 195485 bytes
Signed-off-by: William Roberts <william.c.roberts@intel.com>
pcre_study() can return a NULL result if no additional information
could be determined for the pattern. Thus, sefcontext_compile
needs to correctly handle the case where the study data is NULL
when generating file_contexts.bin, and libselinux needs to correctly
handle it when loading file_contexts.bin. Fix them both.
This change enables:
semanage fcontext -a -t httpd_exec_t "(/.*)?"
to succeed, since the regex itself is valid but there is no
additional information produced by pcre_study().
Reported-by: Vit Mojzis <vmojzis@redhat.com>
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
Add additional error handling, flags, xdev handling, alt_rootpath and
add/remove non-seclabel fs's to support setfiles(8), restorecon(8)
and restorecond(8) functionality.
Signed-off-by: Richard Haines <richard_c_haines@btinternet.com>
This patch adds inode evaluation services from policycoreutiles/setfiles
to selinux_restorecon.c
The overall objective is to modify restorecon(8) and setfiles(8)
to use selinux_restorecon(3) services.
Signed-off-by: Richard Haines <richard_c_haines@btinternet.com>
There was a change in swig-3.10 to use importlib instead of imp. While
the implementation with imp looked for _selinux.so also into the same directory
as __init__.py is, a new module with importlib searchs only standard paths.
It means that we need to move _selinux.so from $(PYLIBDIR)/site-packages/selinux/
to $(PYLIBDIR)/site-packages/.
Fixes:
>>> import selinux
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/lib64/python2.7/site-packages/selinux/__init__.py", line 21, in <module>
_selinux = swig_import_helper()
File "/usr/lib64/python2.7/site-packages/selinux/__init__.py", line 20, in swig_import_helper
return importlib.import_module('_selinux')
File "/usr/lib64/python2.7/importlib/__init__.py", line 37, in import_module
__import__(name)
ImportError: No module named _selinux
Signed-off-by: Petr Lautrbach <plautrba@redhat.com>
Improve the description by mentioning that if is_selinux_mls_enabled(),
it simply means that the kernel has MLS support and the policy contains
MLS features. To check whether MLS support is enabled on the running
system, use selinux_getpolicytype().
Signed-off-by: David King <dking@redhat.com>
filepath needs to be resolved first in order to be correctly found by
selabel_lookup_raw()
Fixes:
$ matchpathcon -V passwd
passwd has context system_u:object_r:passwd_file_t:s0, should be
system_u:object_r:passwd_file_t:s0
$ echo $?
1
Signed-off-by: Petr Lautrbach <plautrba@redhat.com>
