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- Add function to compare file context on disk versus contexts in

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file_contexts file.
This commit is contained in:
Daniel J Walsh 2006-06-20 20:30:59 +00:00
parent e60c844fba
commit 645f93a8a5
2 changed files with 264 additions and 153 deletions
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410
libselinux-rhat.patch
View File

@ -1,165 +1,271 @@
diff --exclude-from=exclude -N -u -r nsalibselinux/include/selinux/selinux.h libselinux-1.30.12/include/selinux/selinux.h
--- nsalibselinux/include/selinux/selinux.h 2006-05-18 12:11:17.000000000 -0400
+++ libselinux-1.30.12/include/selinux/selinux.h 2006-06-09 15:29:18.000000000 -0400
@@ -361,6 +361,13 @@
extern int selinux_getenforcemode(int *enforce);
/*
+ selinux_getpolicytype reads the /etc/selinux/config file and determines
+ what the default policy for the machine is. Calling application must
+ free policytype.
+ */
+extern int selinux_getpolicytype(char **policytype);
+
+/*
selinux_policy_root reads the /etc/selinux/config file and returns
the directory path under which the compiled policy file and context
configuration files exist.
diff --exclude-from=exclude -N -u -r nsalibselinux/src/selinux_config.c libselinux-1.30.12/src/selinux_config.c
--- nsalibselinux/src/selinux_config.c 2006-05-23 06:19:32.000000000 -0400
+++ libselinux-1.30.12/src/selinux_config.c 2006-06-09 15:42:35.000000000 -0400
@@ -124,6 +124,37 @@
}
hidden_def(selinux_getenforcemode)
+int selinux_getpolicytype(char **intype) {
+ int ret=-1;
+ char *type=NULL;
+ char *end=NULL;
+ FILE *cfg = fopen(SELINUXCONFIG,"r");
+ char buf[4097];
+ int len=sizeof(SELINUXTYPETAG)-1;
+ if (!cfg) {
+ cfg = fopen(SECURITYCONFIG,"r");
+ }
+ if (cfg) {
+ while (fgets_unlocked(buf, 4096, cfg)) {
+ if (strncmp(buf,SELINUXTYPETAG,len))
+ continue;
+ type = strdupa(buf+sizeof(SELINUXTYPETAG)-1);
+ end = type + strlen(type)-1;
+ while ((end > type) &&
+ (isspace(*end) || iscntrl(*end))) {
+ *end = 0;
+ end--;
+ }
+ *intype=type;
+ ret=0;
+ break;
+ }
+ fclose(cfg);
+ }
+ return ret;
+}
+hidden_def(selinux_getpolicytype)
+
static char *selinux_policyroot = NULL;
static char *selinux_rootpath = NULL;
diff --exclude-from=exclude -N -u -r nsalibselinux/src/selinux_internal.h libselinux-1.30.12/src/selinux_internal.h
--- nsalibselinux/src/selinux_internal.h 2006-05-23 06:19:32.000000000 -0400
+++ libselinux-1.30.12/src/selinux_internal.h 2006-06-09 15:29:18.000000000 -0400
@@ -64,6 +64,7 @@
hidden_proto(selinux_usersconf_path);
hidden_proto(selinux_translations_path);
hidden_proto(selinux_getenforcemode);
+hidden_proto(selinux_getpolicytype);
hidden_proto(selinux_raw_to_trans_context);
hidden_proto(selinux_trans_to_raw_context);
diff --exclude-from=exclude -N -u -r nsalibselinux/src/selinux.py libselinux-1.30.12/src/selinux.py
--- nsalibselinux/src/selinux.py 2006-05-15 09:43:24.000000000 -0400
+++ libselinux-1.30.12/src/selinux.py 2006-06-09 15:29:18.000000000 -0400
@@ -102,6 +102,7 @@
is_context_customizable = _selinux.is_context_customizable
selinux_trans_to_raw_context = _selinux.selinux_trans_to_raw_context
selinux_raw_to_trans_context = _selinux.selinux_raw_to_trans_context
+selinux_getpolicytype = _selinux.selinux_getpolicytype
getseuserbyname = _selinux.getseuserbyname
diff --exclude-from=exclude -N -u -r nsalibselinux/src/selinuxswig.i libselinux-1.30.12/src/selinuxswig.i
--- nsalibselinux/src/selinuxswig.i 2006-05-15 09:43:24.000000000 -0400
+++ libselinux-1.30.12/src/selinuxswig.i 2006-06-09 15:29:18.000000000 -0400
@@ -126,4 +126,5 @@
%typemap(argout) char ** {
$result = SWIG_Python_AppendOutput($result, PyString_FromString(*$1));
}
+extern int selinux_getpolicytype(char **enforce);
diff --exclude-from=exclude -N -u -r nsalibselinux/include/selinux/selinux.h libselinux-1.30.15/include/selinux/selinux.h
--- nsalibselinux/include/selinux/selinux.h 2006-06-16 15:08:24.000000000 -0400
+++ libselinux-1.30.15/include/selinux/selinux.h 2006-06-20 15:48:14.000000000 -0400
@@ -429,8 +429,20 @@
Caller must free the returned strings via free. */
extern int getseuserbyname(const char *linuxuser, char **seuser, char **level);
diff --exclude-from=exclude -N -u -r nsalibselinux/src/selinuxswig_wrap.c libselinux-1.30.12/src/selinuxswig_wrap.c
--- nsalibselinux/src/selinuxswig_wrap.c 2006-05-15 09:43:24.000000000 -0400
+++ libselinux-1.30.12/src/selinuxswig_wrap.c 2006-06-09 15:29:18.000000000 -0400
@@ -4153,6 +4153,27 @@
+/* This function allows you to compare two security context, it will ignore the
+user component */
+int selinux_context_cmp(const security_context_t a, const security_context_t b);
+
+/* This function looks at the file context on disk and compares it to the
+system defaults, it returns 1 on match non 0 on failure */
+int selinux_verify_file_context(const char *path, mode_t mode);
+
+/* This function sets the file context on to the system defaults returns 0 on success */
+int selinux_lsetfilecon_default(const char *path);
+
#ifdef __cplusplus
}
#endif
#endif
+
diff --exclude-from=exclude -N -u -r nsalibselinux/man/man8/matchpathcon.8 libselinux-1.30.15/man/man8/matchpathcon.8
--- nsalibselinux/man/man8/matchpathcon.8 2006-05-15 09:43:24.000000000 -0400
+++ libselinux-1.30.15/man/man8/matchpathcon.8 2006-06-20 10:56:07.000000000 -0400
@@ -3,13 +3,25 @@
matchpathcon \- get the default security context for the specified path from the file contexts configuration.
.SH "SYNOPSIS"
-.B matchpathcon [-n] filepath...
-
+.B matchpathcon [-V] [-N] [-n] [-f file_contexts_file ] [-p prefix ] filepath...
.SH "DESCRIPTION"
.B matchpathcon
Prints the file path and the default security context associated with it.
+.SH OPTIONS
+.B \-n
+Do not display path.
+.br
+.B \-N
+Do not use translations.
+.br
+.B \-f file_context_file
+Use alternate file_context file
+.br
+.B \-p prefix
+Use prefix to speed translations
.br
-If the -n option is given, do not display path.
+.B \-V
+Verify file context on disk matches defaults
.SH AUTHOR
This manual page was written by Dan Walsh <dwalsh@redhat.com>.
diff --exclude-from=exclude -N -u -r nsalibselinux/src/matchpathcon.c libselinux-1.30.15/src/matchpathcon.c
--- nsalibselinux/src/matchpathcon.c 2006-05-18 12:11:17.000000000 -0400
+++ libselinux-1.30.15/src/matchpathcon.c 2006-06-20 15:37:25.000000000 -0400
@@ -26,6 +26,8 @@
va_end(ap);
}
+SWIGINTERN PyObject *_wrap_selinux_getpolicytype(PyObject *SWIGUNUSEDPARM(self), PyObject *args) {
+ PyObject *resultobj = 0;
+ char **arg1 = (char **) 0 ;
+ int result;
+ char *temp1 ;
+static unsigned int myflags;
+
+ {
+ arg1 = &temp1;
+ }
+ if (!PyArg_ParseTuple(args,(char *)":selinux_getpolicytype")) SWIG_fail;
+ result = (int)selinux_getpolicytype(arg1);
+ resultobj = SWIG_From_int((int)(result));
+ {
+ resultobj = SWIG_Python_AppendOutput(resultobj, PyString_FromString(*arg1));
+ }
+ return resultobj;
+fail:
+ return NULL;
static void
#ifdef __GNUC__
__attribute__ ((format (printf, 1, 2)))
@@ -50,7 +52,12 @@
static int default_canoncon(const char *path, unsigned lineno, char **context)
{
char *tmpcon;
- if (security_canonicalize_context(*context, &tmpcon) < 0) {
+ int rc;
+ if (myflags & MATCHPATHCON_NOTRANS)
+ rc = security_canonicalize_context_raw(*context, &tmpcon);
+ else
+ rc = security_canonicalize_context(*context, &tmpcon);
+ if ( rc < 0) {
if (errno == ENOENT)
return 0;
if (lineno)
@@ -74,8 +81,6 @@
mycanoncon = &default_canoncon;
}
-static unsigned int myflags;
-
void set_matchpathcon_flags(unsigned int flags)
{
myflags = flags;
@@ -580,7 +585,6 @@
spec_arr[nspec].context_valid = 1;
}
}
-
spec_arr[nspec].context = context;
/* Determine if specification has
@@ -797,7 +801,6 @@
errno = ENOENT;
return -1;
}
-
spec_arr[i].matches++;
return i;
@@ -877,3 +880,73 @@
}
}
}
+
+/* Compare two contexts to see if their differences are "significant",
+ * or whether the only difference is in the user. */
+int selinux_context_cmp(const security_context_t a, const security_context_t b)
+{
+ char *rest_a, *rest_b; /* Rest of the context after the user */
+ if (!a && !b) return 0;
+ if (!a && b) return -1;
+ if (a && !b) return 1;
+ rest_a = strchr((char *)a, ':');
+ rest_b = strchr((char *)b, ':');
+ if (!rest_a && !rest_b) return 0;
+ if (!rest_a && rest_b) return -1;
+ if (rest_a && !rest_b) return 1;
+ return strcmp(rest_a, rest_b);
+}
+
+int selinux_verify_file_context(const char *path, mode_t mode)
+{
+ security_context_t con = NULL;
+ security_context_t fcontext = NULL;
+ int rc=0;
+
+ if (myflags & MATCHPATHCON_NOTRANS)
+ rc = lgetfilecon_raw(path, &con);
+ else
+ rc = lgetfilecon(path, &con);
+ if (rc == -1) {
+ if (errno != ENOTSUP)
+ return 1;
+ else
+ return 0;
+ }
+
+ if (matchpathcon(path,mode,&fcontext) != 0) {
+ if (fcontext == NULL && errno != ENOENT)
+ rc = 1;
+ else
+ rc = 0;
+ }
+ else
+ rc = (selinux_context_cmp(fcontext, con) == 0);
+ freecon(con);
+ freecon(fcontext);
+ return rc;
+}
+
+
SWIGINTERN PyObject *_wrap_getseuserbyname(PyObject *SWIGUNUSEDPARM(self), PyObject *args) {
PyObject *resultobj = 0;
char *arg1 = (char *) 0 ;
@@ -4253,6 +4274,7 @@
{ (char *)"is_context_customizable", _wrap_is_context_customizable, METH_VARARGS, NULL},
{ (char *)"selinux_trans_to_raw_context", _wrap_selinux_trans_to_raw_context, METH_VARARGS, NULL},
{ (char *)"selinux_raw_to_trans_context", _wrap_selinux_raw_to_trans_context, METH_VARARGS, NULL},
+ { (char *)"selinux_getpolicytype", _wrap_selinux_getpolicytype, METH_VARARGS, NULL},
{ (char *)"getseuserbyname", _wrap_getseuserbyname, METH_VARARGS, NULL},
{ NULL, NULL, 0, NULL }
};
--- libselinux-1.30.12/src/setrans_client.c~ 2006-06-05 13:20:37.000000000 -0400
+++ libselinux-1.30.12/src/setrans_client.c 2006-06-12 13:39:55.000000000 -0400
@@ -16,6 +16,9 @@
#include "selinux_internal.h"
#include "setrans_internal.h"
+static int mls_enabled=-1;
+#define MLSENABLED ((mls_enabled==-1) ? (mls_enabled=is_selinux_mls_enabled()) : mls_enabled)
+int selinux_lsetfilecon_default(const char *path) {
+ struct stat st;
+ int rc = -1;
+ security_context_t scontext=NULL;
+ unsigned int localflags=myflags;
+ if (lstat(path, &st) != 0)
+ return rc;
+
// Simple cache
static __thread security_context_t prev_t2r_trans=NULL;
static __thread security_context_t prev_t2r_raw=NULL;
@@ -243,6 +246,12 @@
*rawp = NULL;
return 0;
}
+ set_matchpathcon_flags(myflags | MATCHPATHCON_NOTRANS);
+
+ if (! MLSENABLED) {
+ *rawp = strdup(trans);
+ return 0;
+ /* If there's an error determining the context, or it has none,
+ return to allow default context */
+ if (matchpathcon(path, st.st_mode, &scontext)) {
+ if (scontext == NULL && errno != ENOENT)
+ rc =0;
+ } else {
+ rc = lsetfilecon_raw(path, scontext);
+ freecon(scontext);
+ }
+
if (cache_trans) {
if (prev_t2r_trans && strcmp(prev_t2r_trans, trans) == 0) {
*rawp=strdup(prev_t2r_raw);
@@ -279,6 +288,11 @@
return 0;
}
+ set_matchpathcon_flags(localflags);
+ return rc;
+}
diff --exclude-from=exclude -N -u -r nsalibselinux/utils/matchpathcon.c libselinux-1.30.15/utils/matchpathcon.c
--- nsalibselinux/utils/matchpathcon.c 2006-05-18 12:11:17.000000000 -0400
+++ libselinux-1.30.15/utils/matchpathcon.c 2006-06-20 11:30:26.000000000 -0400
@@ -12,19 +12,43 @@
exit(1);
}
+ if (! MLSENABLED) {
+ *transp = strdup(raw);
+ return 0;
+int printmatchpathcon(char *path, int header) {
+ char *buf;
+ int rc = matchpathcon(path, 0, &buf);
+ if (rc < 0) {
+ fprintf(stderr, "matchpathcon(%s) failed\n", path);
+ return 2;
+ }
+ if (header)
+ printf("%s\t%s\n", path, buf);
+ else
+ printf("%s\n", buf);
+
if (cache_trans) {
if (prev_r2t_raw && strcmp(prev_r2t_raw, raw) == 0) {
*transp=strdup(prev_r2t_trans);
+ freecon(buf);
+ return 0;
+}
+
int main(int argc, char **argv)
{
- char *buf;
- int rc, i, init = 0;
+ int i, init = 0;
int header=1, opt;
+ int verify=0;
+ int notrans=0;
if (argc < 2) usage(argv[0]);
- while ((opt = getopt(argc, argv, "nf:p:")) > 0) {
+ while ((opt = getopt(argc, argv, "Nnf:p:V")) > 0) {
switch (opt) {
case 'n':
header=0;
break;
+ case 'V':
+ verify=1;
+ break;
+ case 'N':
+ notrans=1;
+ set_matchpathcon_flags(MATCHPATHCON_NOTRANS);
+ break;
case 'f':
if (init) {
fprintf(stderr, "%s: -f and -p are exclusive\n", argv[0]);
@@ -54,17 +78,29 @@
}
}
for (i = optind; i < argc; i++) {
- rc = matchpathcon(argv[i], 0, &buf);
- if (rc < 0) {
- fprintf(stderr, "%s: matchpathcon(%s) failed\n", argv[0], argv[i]);
- return 2;
- }
- if (header)
- printf("%s\t%s\n", argv[i], buf);
- else
- printf("%s\n", buf);
+ if (verify) {
+ if (selinux_verify_file_context(argv[i], 0)) {
+ printf("%s verified.\n", argv[i]);
+ } else {
+ security_context_t con;
+ int rc;
+ if (notrans)
+ rc = lgetfilecon_raw(argv[i], &con);
+ else
+ rc = lgetfilecon(argv[i], &con);
- freecon(buf);
+ if (rc >= 0) {
+ printf("%s has context %s, should be ", argv[i], con);
+ printmatchpathcon(argv[i], 0);
+ freecon(con);
+ } else {
+ printf("actual context unknown: %s, should be ", strerror(errno));
+ printmatchpathcon(argv[i], 0);
+ }
+ }
+ } else {
+ printmatchpathcon(argv[i], header);
+ }
}
matchpathcon_fini();
return 0;

7
libselinux.spec
View File

@ -2,10 +2,11 @@
Summary: SELinux library and simple utilities
Name: libselinux
Version: 1.30.15
Release: 1
Release: 2
License: Public domain (uncopyrighted)
Group: System Environment/Libraries
Source: http://www.nsa.gov/selinux/archives/%{name}-%{version}.tgz
Patch: libselinux-rhat.patch
BuildRequires: libsepol-devel >= %{libsepolver} swig
Requires: libsepol >= %{libsepolver} setransd
@ -47,6 +48,7 @@ needed for developing SELinux applications.
%prep
%setup -q
%patch -p1 -b .rhat
%build
make clean
@ -115,6 +117,9 @@ exit 0
%{_libdir}/python*/site-packages/selinux.py*
%changelog
* Mon Jun 19 2006 Dan Walsh <dwalsh@redhat.com> 1.30.15-2
- Add function to compare file context on disk versus contexts in file_contexts file.
* Fri Jun 16 2006 Dan Walsh <dwalsh@redhat.com> 1.30.15-1
- Upgrade to latest from NSA
* Merged patch from Dan Walsh with: