Signed-off-by: John Johansen <[email protected]>
---
libraries/libapparmor/doc/aa_query_label.pod | 9 +++++++++
libraries/libapparmor/include/sys/apparmor.h | 4 +++-
libraries/libapparmor/src/kernel.c | 24 ++++++++++++++++++++++++
libraries/libapparmor/src/libapparmor.map | 1 +
libraries/libapparmor/swig/SWIG/libapparmor.i | 2 ++
5 files changed, 39 insertions(+), 1 deletion(-)
diff --git a/libraries/libapparmor/doc/aa_query_label.pod
b/libraries/libapparmor/doc/aa_query_label.pod
index 9aa563a..db15fcc 100644
--- a/libraries/libapparmor/doc/aa_query_label.pod
+++ b/libraries/libapparmor/doc/aa_query_label.pod
@@ -30,6 +30,8 @@ B<#include E<lt>sys/apparmor.hE<gt>>
B<int aa_query_label((uint32_t mask, char *query, size_t size, int *allowed,
int *audited);>
+B<int aa_query_file((uint32_t mask, const char *label, const char *path,
+ int *allowed, int *audited);>
Link with B<-lapparmor> when compiling.
@@ -52,6 +54,13 @@ of directly using I<aa_query_label>. If directly using the
interface the
I<query> string is required to have a header of B<AA_QUERY_CMD_LABEL_SIZE>
that will be used by I<aa_query_label>.
+
+The B<aa_query_file> function is a helper function that assembles a properly
+formated path query for the B<aa_query_label> function. The I<label> is a valid
+apparmor label as returned by I<aa_split_con> and the I<path> is any valid
+filesystem path to query permissions for.
+
+
=head1 RETURN VALUE
On success 0 is returned, and the I<allowed> and I<audited> parameters
diff --git a/libraries/libapparmor/include/sys/apparmor.h
b/libraries/libapparmor/include/sys/apparmor.h
index 99ce36b..a408741 100644
--- a/libraries/libapparmor/include/sys/apparmor.h
+++ b/libraries/libapparmor/include/sys/apparmor.h
@@ -27,7 +27,7 @@ __BEGIN_DECLS
/*
* Class of public mediation types in the AppArmor policy db
*/
-
+#define AA_CLASS_FILE 2
#define AA_CLASS_DBUS 32
@@ -79,6 +79,8 @@ extern int aa_getpeercon(int fd, char **label, char **mode);
extern int aa_query_label(uint32_t mask, char *query, size_t size, int *allow,
int *audit);
+extern int aa_query_file(uint32_t mask, const char *label, const char *path,
+ int *allowed, int *audited);
#define __macroarg_counter(Y...) __macroarg_count1 ( , ##Y)
#define __macroarg_count1(Y...) __macroarg_count2 (Y,
16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0)
diff --git a/libraries/libapparmor/src/kernel.c
b/libraries/libapparmor/src/kernel.c
index 9d5f45d..d140f6b 100644
--- a/libraries/libapparmor/src/kernel.c
+++ b/libraries/libapparmor/src/kernel.c
@@ -786,3 +786,27 @@ int query_label(uint32_t mask, char *query, size_t size,
int *allowed,
extern typeof((query_label)) __aa_query_label __attribute__((alias
("query_label")));
symbol_version(__aa_query_label, aa_query_label, APPARMOR_1.1);
default_symbol_version(query_label, aa_query_label, APPARMOR_2.9);
+
+
+int aa_query_file(uint32_t mask, const char *label, const char *path,
+ int *allowed, int *audited)
+{
+ int rc;
+ char *query;
+
+ int lsize = strlen(label);
+ int psize = strlen(path);
+ /* + 1 for null separator */
+ int size = AA_QUERY_CMD_LABEL_SIZE + lsize + 1 + psize;
+ query = malloc(size + 1);
+ if (!query)
+ return -1;
+ /* we want the null terminator here */
+ strcpy(query + AA_QUERY_CMD_LABEL_SIZE, label);
+ query[AA_QUERY_CMD_LABEL_SIZE + lsize + 1] = AA_CLASS_FILE;
+ memcpy(query + AA_QUERY_CMD_LABEL_SIZE + lsize + 2, path, psize);
+ rc = aa_query_label(mask, query, size , allowed, audited);
+ free(query);
+
+ return rc;
+}
diff --git a/libraries/libapparmor/src/libapparmor.map
b/libraries/libapparmor/src/libapparmor.map
index 3f43494..3514682 100644
--- a/libraries/libapparmor/src/libapparmor.map
+++ b/libraries/libapparmor/src/libapparmor.map
@@ -54,6 +54,7 @@ APPARMOR_2.9 {
APPARMOR_2.10 {
global:
+ aa_query_file;
aa_features_new;
aa_features_new_from_string;
aa_features_new_from_kernel;
diff --git a/libraries/libapparmor/swig/SWIG/libapparmor.i
b/libraries/libapparmor/swig/SWIG/libapparmor.i
index 6bae3f6..0bf3b2a 100644
--- a/libraries/libapparmor/swig/SWIG/libapparmor.i
+++ b/libraries/libapparmor/swig/SWIG/libapparmor.i
@@ -39,5 +39,7 @@ extern int aa_getpeercon_raw(int fd, char *buf, int *len,
char **mode);
extern int aa_getpeercon(int fd, char **label, char **mode);
extern int aa_query_label(uint32_t mask, char *query, size_t size, int *allow,
int *audit);
+extern int aa_query_file(uint32_t mask, const char *label, const char *path,
+ int *allowed, int *audited);
%exception;
--
2.1.4
--
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