Only return enabled if in enforcing mode, not fix or log modes.
Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
Changes:
- Define is_ima_appraise_enabled() as a bool (Thiago Bauermann)
The builtin "ima_appraise_tcb" policy should require file signatures for
at least a few of the hooks (eg. kernel modules, firmware, and the kexec
kernel image), but changing it would break the existing userspace/kernel
ABI.
This patch defines a new builtin policy named "secure_boot", which
can be specified on the "ima_policy=" boot command line, independently
or in conjunction with the "ima_appraise_tcb" policy, by specifing
ima_policy="appraise_tcb | secure_boot". The new appraisal rules
requiring file signatures will be added prior to the "ima_appraise_tcb"
rules.
Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
Changelog:
- Reference secure boot in the new builtin policy name. (Thiago Bauermann)
Add support for providing multiple builtin policies on the "ima_policy="
boot command line. Use "|" as the delimitor separating the policy names.
Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
This is a temporary step, towards using the file->ctx for delegation,
and also helps speed up file queries, until the permission lookup
cache is introduced.
Signed-off-by: John Johansen <john.johansen@canonical.com>
The cross check permission helper macros will help simplify code
that does cross task permission checks like ptrace.
Signed-off-by: John Johansen <john.johansen@canonical.com>
Begin the actual switch to using domain labels by storing them on
the context and converting the label to a singular profile where
possible.
Signed-off-by: John Johansen <john.johansen@canonical.com>
Begin moving apparmor to using broader domain labels, that will allow
run time computation of domain type splitting via "stacking" of
profiles into a domain label vec.
Signed-off-by: John Johansen <john.johansen@canonical.com>
Instead of running file revalidation lazily when read/write are called
copy selinux and revalidate the file table on exec. This avoids
extra mediation overhead in read/write and also prevents file handles
being passed through to a grand child unchecked.
Signed-off-by: John Johansen <john.johansen@canonical.com>
There are still a few places where profile replacement fails to update
and a stale profile is used for mediation. Fix this by moving to
accessing the current label through a critical section that will
always ensure mediation is using the current label regardless of
whether the tasks cred has been updated or not.
Signed-off-by: John Johansen <john.johansen@canonical.com>
There is no reason to have the small stubs that don't use domain
private functions in domain.c, instead move them to lsm.c and make
them static.
Signed-off-by: John Johansen <john.johansen@canonical.com>
The data being queried isn't always the current profile and a lookup
relative to the current profile should be done.
Signed-off-by: John Johansen <john.johansen@canonical.com>
The namespace being passed into the replace/remove profiles fns() is
not the view, but the namespace specified by the inode from the
file hook (if present) or the loading tasks ns, if accessing the
top level virtualized load/replace file interface.
Signed-off-by: John Johansen <john.johansen@canonical.com>
Currently lookups are restricted to a single ns component in the
path. However when namespaces are allowed to have separate views, and
scopes this will not be sufficient, as it will be possible to have
a multiple component ns path in scope.
Add some ns lookup fns() to allow this and use them.
Signed-off-by: John Johansen <john.johansen@canonical.com>
Allow userspace to query a profile about permissions, through the
transaction interface that is already used to allow userspace to
query about key,value data.
Signed-off-by: John Johansen <john.johansen@canonical.com>
The simple_transaction interface is slow. It requires 4 syscalls
(open, write, read, close) per query and shares a single lock for each
queries.
So replace its use with a compatible in multi_transaction interface.
It allows for a faster 2 syscall pattern per query. After an initial
open, an arbitrary number of writes and reads can be issued. Each
write will reset the query with new data that can be read. Reads do
not clear the data, and can be issued multiple times, and used with
seek, until a new write is performed which will reset the data
available and the seek position.
Note: this keeps the single lock design, if needed moving to a per
file lock will have to come later.
Signed-off-by: John Johansen <john.johansen@canonical.com>
gsettings mediation needs to be able to determine if apparmor supports
label data queries. A label data query can be done to test for support
but its failure is indistinguishable from other failures, making it an
unreliable indicator.
Fix by making support of label data queries available as a flag in the
apparmorfs features dir tree.
Signed-off-by: John Johansen <john.johansen@canonical.com>
When setting up namespaces for containers its easier for them to use
an fs interface to create the namespace for the containers
policy. Allow mkdir/rmdir under the policy/namespaces/ dir to be used
to create and remove namespaces.
BugLink: http://bugs.launchpad.net/bugs/1611078
Signed-off-by: John Johansen <john.johansen@canonical.com>
Add a policy revision file to find the current revision of a ns's policy.
There is a revision file per ns, as well as a virtualized global revision
file in the base apparmor fs directory. The global revision file when
opened will provide the revision of the opening task namespace.
The revision file can be waited on via select/poll to detect apparmor
policy changes from the last read revision of the opened file. This
means that the revision file must be read after the select/poll other
wise update data will remain ready for reading.
Signed-off-by: John Johansen <john.johansen@canonical.com>
