Ordering matters in fc files; the last match wins. In builds where
many BOARD_SEPOLICY_DIRS are set, the order of that list becomes
increasingly important in order to maintain a cohesive built
file_contexts.
To correct this, we sort the device specific file_contexts entries
with the upstream fc_sort tool.
Change-Id: Id79cc6f434c41179d5c0d0d739c4718918b0b1dc
Signed-off-by: William Roberts <william.c.roberts@intel.com>
Enable checkfc to check *_contexts against a set of valid attributes
which must be associated with all types in the contexts file that
is being checked.
Since it's imperative that checkfc knows which file its checking to
choose the proper attribute set, the -s option is introduced to
indicate the service_contexts file. The property_contexts file continues
to use the existing -p and file_contexts requires no specification, aka
it's the default.
Failure examples:
file_contexts:
Error: type "init" is not of set: "fs_type, dev_type, file_type"
service_contexts:
Error: type "init_exec" is not of set: "service_manager_type"
property_contexts:
Error: type "bluetooth_service" is not of set: "property_type"
Change-Id: I62077e4d0760858a9459e753e14dfd209868080f
Signed-off-by: William Roberts <william.c.roberts@intel.com>
Initial check in of empty autoplay_app.te policy file.
Create isAutoPlayApp input selector. Give this selector high precedence -
only below isSystemServer.
Add neverallow rule disallowing an app context with isAutoPlayApp=true from
running in a domain other than autoplay_app.
Change-Id: I1d06669d2f1acf953e50867dfa2b264ccaee29a4
Extend checkfc to support comparing two file_contexts or
file_contexts.bin files. This is for use by the CTS
SELinuxHostTest to compare the AOSP general_file_contexts
with the device file_contexts.bin file.
Depends on I0fe63e0c7f11ae067b5aac2f468f7842e5d76986.
Change-Id: I2fff2f8cf87690a76219ddf4cf38939650f34782
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
Introduce "neverallow" rules for seapp_contexts. A neverallow rule is
similar to the existing key-value-pair entries but the line begins
with "neverallow". A neverallow violation is detected when all keys,
both inputs and outputs are matched. The neverallow rules value
parameter (not the key) can contain regular expressions to assist in
matching. Neverallow rules are never output to the generated
seapp_contexts file.
Also, unless -o is specified, checkseapp runs in silent mode and
outputs nothing. Specifying - as an argument to -o outputs to stdout.
Sample Output:
Error: Rule in File "external/sepolicy/seapp_contexts" on line 87: "user=fake domain=system_app type=app_data_file" violates neverallow in File "external/sepolicy/seapp_contexts" on line 57: "user=((?!system).)* domain=system_app"
Change-Id: Ia4dcbf02feb774f2e201bb0c5d4ce385274d8b8d
Signed-off-by: William Roberts <william.c.roberts@intel.com>
rule_map_free() took as a parameter a boolean menu rule_map_switch
that was used to determine if it should free the key pointer that
is also in the table. On GLIBC variants, calls to hdestroy do not
free the key pointer, on NON-GLIBC variants, it does. The original
patch was meant to correct this, however, it always passes "destroy"
as the rule_map_switch. On GLIBC variants this is fine, however on
NON-GLIBC variants, that free was compiled out, and the free() was
handled by hdestroy. In cases of failure where the rule_map was not
in the htable, those key's were not properly free'd.
Change-Id: Ifdf616e09862bca642a4d31bf0cb266168170e50
Signed-off-by: William Roberts <william.c.roberts@intel.com>
When an error occured it was erroneously being indicated that he
file was the output file, not the input file.
Before:
Error: Could not find selinux type "fake_app" on line: 51 in file: out/target/product/flo/obj/ETC/seapp_contexts_intermediates/seapp_contexts
Error: Could not validate
Error: reading out/target/product/flo/obj/ETC/seapp_contexts_intermediates/seapp_contexts.tmp, line 51, name levelFrom, value user
After:
Error: Could not find selinux type "fake_app" on line: 51 in file: out/target/product/flo/obj/ETC/seapp_contexts_intermediates/seapp_contexts.tmp
Error: Could not validate
Error: reading out/target/product/flo/obj/ETC/seapp_contexts_intermediates/seapp_contexts.tmp, line 51, name levelFrom, value user
Change-Id: Ib0e01f1f0ef563a2a150a0a3b4012e6e15d736bb
Signed-off-by: William Roberts <william.c.roberts@intel.com>
If a duplicate entry is found, rule_map_cmp() incorrectly
assumes that the lengths of the key value pairs should be
equal, when this is not true. The duplicate detection is
done on the input parameters, thus the lengths can be
different. This resulted in a duplicate error string
message of "do not match", instead of "match on all inputs".
Also, the file name printed that contained the error was
the output file, not the input file that contained it.
Change-Id: I9b3f99fa4aa3454849de55f18b198b0b56e44320
Signed-off-by: William Roberts <william.c.roberts@intel.com>
Addresses the following error when running CTS on master:
junit.framework.AssertionFailedError: The following errors were encountered when validating the SELinuxneverallow rule:
neverallow { appdomain -bluetooth } self:capability *;
/tmp/SELinuxHostTest5593810182495331783.tmp: error while loading shared libraries: libc++.so: cannot open shared object file: No such file or directory
Also indicate that none of the sepolicy tools need c++ std lib.
(cherry-pick of 0cdb0517be696c0dc6882d289eedd45bf2da918c now made possible by
addition of commit: 28b72eddd54cb1287dd7daae853e8e4b78fa17eb)
Bug: 19617220
Change-Id: I2c5b7ab1ddeb0e02cbaad2b7d5430a0974524a89
This is causing more harm than good. We'll just make these all link
libc++ again and work out the CTS issues if they still exist.
Bug: 19778891
This reverts commit 3812cf58cb.
Change-Id: Iaea8f6acb147da4275633a760ccb32951db7f8b6
This is causing more harm than good. We'll just make these all link
libc++ again (another revert) and work out the CTS issues if they still
exist.
Bug: 19778891
This reverts commit a5113a1500.
Change-Id: I35a4c93dae4abb66e3525451d5ce01e33a540895
Address sanitizer requires using libc++ (apparently). We removed
libc++ from these projects since they were C and the SDK/CTS was not
able to find libc++.
If we're interested in continuing to use ASAN on these tools
(probably), we should turn libc++ back on once we're sure CTS won't
die.
Bug: 19778891
Change-Id: I3c1913171a15396ead73277ec1186fead730f66d
Addresses the following error when running CTS on master:
junit.framework.AssertionFailedError: The following errors were encountered when validating the SELinuxneverallow rule:
neverallow { appdomain -bluetooth } self:capability *;
/tmp/SELinuxHostTest5593810182495331783.tmp: error while loading shared libraries: libc++.so: cannot open shared object file: No such file or directory
Also indicate that none of the sepolicy tools need c++ std lib.
Bug: 19617220
Change-Id: I713b3cbd1220655413d399c7cd2b0b50459a5485
Add an attribute command to sepolicy-analyze for displaying the list
of types associated with an attribute in a policy. This is for use
by CTS to check what domains and types are associated with certain
attributes such as mlstrustedsubject and mlstrustedobject.
Change-Id: Ie19361c02feb1ad14ce36862c6aace9e66c422bb
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
Instead of displaying the boolean count, display a list of booleans
defined in the policy, if any. This makes sepolicy-analyze booleans
consistent with sepolicy-analyze permissive and allows automated tests
to simply check whether there was any output at all.
Change-Id: I221b60d94e6e7f6d80399bf0833887af3747fe83
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
Implement the booleans test in sepolicy-analyze so
that we can move the no-booleans check from the
SELinuxTest to the SELinuxHostTest along with the
other policy checks.
Change-Id: I95d7ad34da10c354470f43734d34a6ec631a7b4e
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
SELinux policy booleans are prohibited in AOSP, so we can drop the
support for the sebool= input selector.
Change-Id: I5ae31247b2f68d90f6ae4c8830458f22c4ffc854
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
Presently it ignores duplicate keys in seapp_contexts entries, e.g.
if you were to specify:
user=system seinfo=platform user=bluetooth domain=system_app type=system_app_data_file
checkseapp would ignore the duplicate and libselinux would end up using
the last value defined for the key in each line.
Change-Id: I18cadb0c1bf5a907e6fc6513df65aafed91d76fe
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
Presently it only detects complete duplicates if you specify -s (strict),
which is not used in the external/sepolicy Makefile, and it allows
overriding earlier entries that have the same input selectors (e.g.
user=, seinfo=) with different values for the output selectors (e.g.
domain=, type=). Thus, a device/<vendor>/<board>/sepolicy/seapp_contexts
file can override the external/sepolicy definitions, and even a single
seapp_contexts file can contain duplicated or conflicting definitions.
Make it always check strictly, and prohibit either duplicates on the
input selectors (i.e. overrides) or complete duplicates (redundant).
Change-Id: Id1e38133cbe31b796253101cfe3b111d1826bc8c
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
Commit dc0ab516f11d8e2c413315e733e25a41ba468e4f changed the libsepol
structures on which sepolicy-analyze relies so that it could be compiled
as a C++ library. Reflect this change in sepolicy-analyze.
Change-Id: I7da601767c3a4ebed7274e33304d8b589a9115fe
host C: sepolicy-analyze <= external/sepolicy/tools/sepolicy-analyze/sepolicy-analyze.c
external/sepolicy/tools/sepolicy-analyze/sepolicy-analyze.c: In function 'usage':
external/sepolicy/tools/sepolicy-analyze/sepolicy-analyze.c:30:5: error: 'for' loop initial declarations are only allowed in C99 mode
external/sepolicy/tools/sepolicy-analyze/sepolicy-analyze.c:30:5: note: use option -std=c99 or -std=gnu99 to compile your code
make: *** [out/host/linux-x86/obj/EXECUTABLES/sepolicy-analyze_intermediates/sepolicy-analyze.o] Error 1
Change-Id: I9222e447b032d051c251c9718e2b8d5ffb9e9c35
Also, divide each sepolicy-analyze function into its own component for simplified
command-line parsing and potentially eventual modularization.
Bug: 18005561
Cherry-pick from: https://android-review.googlesource.com/#/c/111626/
Change-Id: I751a99feffe820308ec58514fdba4cdef184d964
See NEVERALLOW CHECKING in tools/README for documentation.
Depends on change I45b3502ff96b1d093574e1fecff93a582f8d00bd
for libsepol to support reporting all neverallow failures.
Change-Id: I47c16ccb910ac730c092cb3ab977c59cb8197ce0
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
Also, divide each sepolicy-analyze function into its own component for simplified
command-line parsing and potentially eventual modularization.
Bug: 18005561
Change-Id: I45fa07d776cf1bec7d60dba0c03ee05142b86c19
See NEVERALLOW CHECKING in tools/README for documentation.
Depends on change I45b3502ff96b1d093574e1fecff93a582f8d00bd
for libsepol to support reporting all neverallow failures.
Change-Id: I47c16ccb910ac730c092cb3ab977c59cb8197ce0
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
Enable labeling apps differently depending on whether they
are running for the primary user / owner or for a secondary user.
Change-Id: I37aa5b183a7a617cce68ccf14510c31dfee4e04d
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
Also enable global reading of kernel policy file. Motivation for this is to
allow read access to the kernel version of the binary selinux policy.
Bug: 17288791
Change-Id: I1eefb457cea1164a8aa9eeb7683b3d99ee56ca99
Also enable global reading of kernel policy file. Motivation for this is to
allow read access to the kernel version of the binary selinux policy.
Change-Id: I1eefb457cea1164a8aa9eeb7683b3d99ee56ca99
We were incorrectly reporting overlapping rules as duplicates.
Only report cases where an attribute-based rule is a superset
of type-based rule. Also omit self rules as they are often due
to expansion of domain self rules by checkpolicy.
Change-Id: I27f33cdf9467be5fdb6ce148aa0006d407291833
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
check_app already checks for usage of name= entries
in seapp_contexts with no seinfo= specification to
link it back to a signer in mac_permissions.xml.
However, one can avoid this error by specifying
a seinfo=default which merely matches the default
stanza of mac_permissions.xml without actually ensuring
that it is tied to a specific certificate. Catch
that error case too.
Change-Id: If33cf21501e8bfee44d31c92b6341dfa583552b2
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
When running the post_process_mac_perms script
an unneeded newline is appended to modified
mac_permissions.xml file. Use sys.stdout.write
instead which avoids any formatting when printing.
Change-Id: Ib662dab1566299467371389dc236619aec40f5ac
Signed-off-by: rpcraig <rpcraig@tycho.ncsc.mil>
usage: post_process_mac_perms [-h] -s SEINFO -d DIR -f POLICY
Tool to help modify an existing mac_permissions.xml with additional app certs
not already found in that policy. This becomes useful when a directory
containing apps is searched and the certs from those apps are added to the
policy not already explicitly listed.
optional arguments:
-h, --help show this help message and exit
-s SEINFO, --seinfo SEINFO
seinfo tag for each generated stanza
-d DIR, --dir DIR Directory to search for apks
-f POLICY, --file POLICY
mac_permissions.xml policy file
Change-Id: Ifbaca3b3120874a567d3f22eb487de1aa8bda796
Signed-off-by: rpcraig <rpcraig@tycho.ncsc.mil>
Extend check_seapp to accept the use of the new path= specifier
in seapp_contexts and use it to ensure proper labeling of the cache
subdirectory of com.android.providers.downloads for restorecon.
After this change, restorecon /data/data/com.android.providers.downloads/cache
does not change the context, leaving it in download_file rather than
relabeling it to platform_app_data_file.
Depends on Iddaa3931cfd4ddd5b9f62cd66989e1f26553baa1.
Change-Id: Ief65b8c8dcb44ec701d53e0b58c52d6688cc2a14
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
Usage:
sepolicy-analyze -D -P out/target/product/<board>/root/sepolicy
Displays duplicate allow rules, i.e. pairs of allow rules that grant
the same permissions where one allow rule is written directly in terms
of individual types and the other is written in terms of attributes
associated with those same types. The rule with individual types is
a candidate for removal. The rule with individual types may be directly
represented in the source policy or may be a result of expansion of
a type negation (e.g. domain -foo -bar is expanded to individual allow
rules by the policy compiler). Domains with unconfineddomain will
typically have such duplicate rules as a natural side effect and can
be ignored.
Also add a tools/README with a description of all of the tools.
Change-Id: I07838dbd22c5cc8a4a65b57003ccae38129050f5
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
Temporarily revert -Wall -Werror on checkseapp.
This is causing a compiler error on darwin SDK builds.
cc1: warnings being treated as errors
external/sepolicy/tools/check_seapp.c: In function 'rule_map_free':
external/sepolicy/tools/check_seapp.c:439: warning: unused parameter 's'
make: *** [out/host/darwin-x86/obj/EXECUTABLES/checkseapp_intermediates/check_seapp.o] Error 1
Change-Id: I9776777a751f16d5ca0d90e731482c31dac813f9
And also remove the unnecessary references to libselinux for
sepolicy-check, as it has no dependencies on libselinux.
Also enable -Wall -Werror on building all of these tools and
fix up all such errors.
Usage:
$ sepolicy-analyze -e -P out/target/product/<device>/root/sepolicy
or
$ sepolicy-analyze -d -P out/target/product/<device>/root/sepolicy
The first form will display all type pairs that are "equivalent", i.e.
they are identical with respect to allow rules, including indirect allow
rules via attributes and default-enabled conditional rules (i.e. default
boolean values yield a true conditional expression).
Equivalent types are candidates for being coalesced into a single type.
However, there may be legitimate reasons for them to remain separate,
for example:
- the types may differ in a respect not included in the current
analysis, such as default-disabled conditional rules, audit-related
rules (auditallow or dontaudit), default type transitions, or
constraints (e.g. mls), or
- the current policy may be overly permissive with respect to one or the
other of the types and thus the correct action may be to tighten access
to one or the other rather than coalescing them together, or
- the domains that would in fact have different accesses to the types
may not yet be defined or may be unconfined in the policy you are
analyzing (e.g. in AOSP policy).
The second form will display type pairs that differ and the first
difference found between the two types. This output can be long.
We have plans to explore further enhancements to this tool, including
support for identifying isomorphic types. That will be required to
identify similar domains since all domains differ in at least their
entrypoint type and in their tmpfs type and thus will never show up as
equivalent even if they are in all other respects identical to each other.
Change-Id: If0ee00188469d2a1e165fdd52f235c705d22cd4e
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
Modify check_seapp.c to verify that a packagname (name)
must be specified with a signing key (seinfo). This will
help thwart spoof attacks on the packagename.
Change-Id: I8f1aa8a479cb5beb5c3522d85e3181604931ea72
check_seapp at one point in time switch from a home implementation
of a hash table to using GLIBC search.h routines. A struct in one
of the fields was never removed during this transition.
Change-Id: I65c028103ffe90fa52e0b3c9fce28124ed9c7ff9
insertkeys.py used beginswith() when checking that the BEGIN
and END CERTIFICATE clauses in PEM files were correct. It should
have done an explicit check on equality.
Change-Id: I5efb48d180bc674e6281a26a955acd248588b8bd
Many keys end with whitespace or otherwise have whitespace separating the
certificates. If insertkeys is intended to support multiple certificates, we
should also support blank line separators.
Change-Id: I5fd17be5785ad1b89a6191e9ba33bbc7c5a4e8e9
Insert keys would erroneously process pem files
with openssl headers in them. Also, the tool would
be fooled into attempting to use pem files that
had private keys and other things in the format.
This patch strengthens the formatting requirements
and increases the verboseness of error messages
when processing pem files.
Change-Id: I03353faaa641233a000d1a18943024ae47c63e0f
$ sepolicy-check -s untrusted_app -t mediaserver -c binder -p call -P out/target/product/manta/root/sepolicy
Match found!
Also removed loading of initial SIDs as that is not required for
this functionality and it leaks memory as it is never freed.
valgrind now reports no leaks.
Change-Id: Ic7a26fd01c57914e4e96db504d669f5367542a35
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
Currently a path to a key in keys.conf must be fully qualified or have
the -d option appended. This fix will allow paths to have environment
variables that will be expanded. This will give portability to the
entries. For example the following entry will now be resolved correctly:
[@NET_APPS]
ALL : $ANDROID_BUILD_TOP/device/demo_vendor/demo_dev/security/net_apps.x509.pem
Change-Id: If4f169d9ed4f37b6ebd062508de058f3baeafead
Signed-off-by: Richard Haines <richard_c_haines@btinternet.com>
Allow script to union mac_permissions.xml files
specified using the BOARD_SEPOLICY_DIRS and
BOARD_SEPOLICY_UNION constructs.
Change-Id: I4fc65fd1ab4c612f25e966f030247e54a270b614
Signed-off-by: rpcraig <rpcraig@tycho.ncsc.mil>
This reverts commit cd4104e84b
This builds clean locally, but seems to explode on the build servers. Reverting until there's a solution.
Change-Id: I09200db37c193f39c77486d5957a8f5916e38aa0
Introduce a levelFrom=none|app|user|all syntax for specifying
per-app, per-user, or per-combination level assignment.
levelFromUid=true|false remains valid syntax but is deprecated.
levelFromUid=true is equivalent to levelFrom=app.
Update check_seapp to accept the new syntax.
Update seapp_contexts to document the new syntax and switch
from levelFromUid=true to levelFrom=app. No change in behavior.
Change-Id: Ibaddeed9bc3e2586d524efc2f1faa5ce65dea470
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
Support the inseretion of the public key from pem
files into the mac_permissions.xml file at build
time.
Change-Id: Ia42b6cba39bf93723ed3fb85236eb8f80a08962a
