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[Selinux-commits] SF.net SVN: selinux: [2748] trunk/policycoreutils/audit2why
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From: <ssm...@us...> - 2008-01-23 21:15:14
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Revision: 2748
http://selinux.svn.sourceforge.net/selinux/?rev=2748&view=rev
Author: ssmalley
Date: 2008-01-23 13:15:12 -0800 (Wed, 23 Jan 2008)
Log Message:
-----------
Remove old audit2why.
Removed Paths:
-------------
trunk/policycoreutils/audit2why/audit2why.8
trunk/policycoreutils/audit2why/audit2why.c
Deleted: trunk/policycoreutils/audit2why/audit2why.8
===================================================================
--- trunk/policycoreutils/audit2why/audit2why.8 2008-01-23 20:58:18 UTC (rev 2747)
+++ trunk/policycoreutils/audit2why/audit2why.8 2008-01-23 21:15:12 UTC (rev 2748)
@@ -1,79 +0,0 @@
-.\" Hey, Emacs! This is an -*- nroff -*- source file.
-.\" Copyright (c) 2005 Dan Walsh <dw...@re...>
-.\"
-.\" This is free documentation; you can redistribute it and/or
-.\" modify it under the terms of the GNU General Public License as
-.\" published by the Free Software Foundation; either version 2 of
-.\" the License, or (at your option) any later version.
-.\"
-.\" The GNU General Public License's references to "object code"
-.\" and "executables" are to be interpreted as the output of any
-.\" document formatting or typesetting system, including
-.\" intermediate and printed output.
-.\"
-.\" This manual is distributed in the hope that it will be useful,
-.\" but WITHOUT ANY WARRANTY; without even the implied warranty of
-.\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-.\" GNU General Public License for more details.
-.\"
-.\" You should have received a copy of the GNU General Public
-.\" License along with this manual; if not, write to the Free
-.\" Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139,
-.\" USA.
-.\"
-.\"
-.TH AUDIT2WHY "8" "May 2005" "Security Enhanced Linux" NSA
-.SH NAME
-audit2why \- Translates SELinux audit messages into a description of why the access was denied
-.SH SYNOPSIS
-.B audit2why
-.RI [ options "] "
-.SH OPTIONS
-.TP
-
-.B "\-\-help"
-Print a short usage message
-.TP
-.B "\-p <policyfile>"
-Specify an alternate policy file.
-.SH DESCRIPTION
-.PP
-This utility processes SELinux audit messages from standard
-input and and reports which component of the policy caused each
-permission denial based on the specified policy file if the -p option
-was used or the active policy otherwise. There are three possible
-causes: 1) a missing or disabled TE allow rule, 2) a constraint violation,
-or 3) a missing role allow rule. In the first case, the TE allow
-rule may exist in the policy but may be disabled due to boolean settings.
-See
-.BR booleans (8).
-If the allow rule is not present at all, it can be generated via
-.BR audit2allow (1).
-In the second case, a constraint is being violated; see policy/constraints
-or policy/mls to identify the particular constraint. Typically, this can
-be resolved by adding a type attribute to the domain. In the third case,
-a role transition was attempted but no allow rule existed for the role pair.
-This can be resolved by adding an allow rule for the role pair to the policy.
-.PP
-.SH EXAMPLE
-.nf
-$ /usr/sbin/audit2why < /var/log/audit/audit.log
-
-type=KERNEL msg=audit(1115316408.926:336418): avc: denied { getattr } for path=/home/sds dev=hda5 ino=1175041 scontext=root:secadm_r:secadm_t:s0-s9:c0.c127 tcontext=user_u:object_r:user_home_dir_t:s0 tclass=dir
- Was caused by:
- Missing or disabled TE allow rule.
- Allow rules may exist but be disabled by boolean settings; check boolean settings.
- You can see the necessary allow rules by running audit2allow with this audit message as input.
-
-type=KERNEL msg=audit(1115320071.648:606858): avc: denied { append } for name=.bash_history dev=hda5 ino=1175047 scontext=user_u:user_r:user_t:s1-s9:c0.c127 tcontext=user_u:object_r:user_home_t:s0 tclass=file
- Was caused by:
- Constraint violation.
- Check policy/constraints.
- Typically, you just need to add a type attribute to the domain to satisfy the constraint.
-.fi
-.PP
-.SH AUTHOR
-This manual page was written by
-.I Dan Walsh <dw...@re...>,
-.B audit2why
-utility was written by Stephen Smalley <sd...@ty...>.
Deleted: trunk/policycoreutils/audit2why/audit2why.c
===================================================================
--- trunk/policycoreutils/audit2why/audit2why.c 2008-01-23 20:58:18 UTC (rev 2747)
+++ trunk/policycoreutils/audit2why/audit2why.c 2008-01-23 21:15:12 UTC (rev 2748)
@@ -1,313 +0,0 @@
-#define _GNU_SOURCE
-#include <unistd.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <ctype.h>
-#include <errno.h>
-#include <getopt.h>
-#include <limits.h>
-#include <sepol/sepol.h>
-#include <sepol/policydb/services.h>
-#include <selinux/selinux.h>
-
-#define AVCPREFIX "avc: denied { "
-#define SCONTEXT "scontext="
-#define TCONTEXT "tcontext="
-#define TCLASS "tclass="
-
-void usage(char *progname, int rc)
-{
- fprintf(stderr, "usage: %s [-p policy] < /var/log/audit/audit.log\n",
- progname);
- exit(rc);
-}
-
-int main(int argc, char **argv)
-{
- char path[PATH_MAX];
- char *buffer = NULL, *bufcopy = NULL;
- unsigned int lineno = 0;
- size_t len = 0, bufcopy_len = 0;
- FILE *fp = NULL;
- int opt, rc, set_path = 0;
- char *p, *scon, *tcon, *tclassstr, *permstr;
- sepol_security_id_t ssid, tsid;
- sepol_security_class_t tclass;
- sepol_access_vector_t perm, av;
- struct sepol_av_decision avd;
- unsigned int reason;
- int vers = 0;
- sidtab_t sidtab;
- policydb_t policydb;
- struct policy_file pf;
-
- while ((opt = getopt(argc, argv, "p:?h")) > 0) {
- switch (opt) {
- case 'p':
- set_path = 1;
- strncpy(path, optarg, PATH_MAX);
- fp = fopen(path, "r");
- if (!fp) {
- fprintf(stderr, "%s: unable to open %s: %s\n",
- argv[0], path, strerror(errno));
- exit(1);
- }
- break;
- default:
- usage(argv[0], 0);
- }
- }
-
- if (argc - optind)
- usage(argv[0], 1);
-
- if (!set_path) {
- if (!is_selinux_enabled()) {
- fprintf(stderr,
- "%s: Must specify -p policy on non-SELinux systems\n",
- argv[0]);
- exit(1);
- }
- vers = security_policyvers();
- if (vers < 0) {
- fprintf(stderr,
- "%s: Could not get policy version: %s\n",
- argv[0], strerror(errno));
- exit(1);
- }
- snprintf(path, PATH_MAX, "%s.%d",
- selinux_binary_policy_path(), vers);
- fp = fopen(path, "r");
- while (!fp && errno == ENOENT && --vers) {
- snprintf(path, PATH_MAX, "%s.%d",
- selinux_binary_policy_path(), vers);
- fp = fopen(path, "r");
- }
- if (!fp) {
- snprintf(path, PATH_MAX, "%s.%d",
- selinux_binary_policy_path(),
- security_policyvers());
- fprintf(stderr, "%s: unable to open %s: %s\n",
- argv[0], path, strerror(errno));
- exit(1);
- }
- }
-
- /* Set up a policydb directly so that we can mutate it later
- for booleans and user settings. Otherwise we would just use
- sepol_set_policydb_from_file() here. */
- pf.fp = fp;
- pf.type = PF_USE_STDIO;
- if (policydb_init(&policydb)) {
- fprintf(stderr, "%s: policydb_init failed: %s\n",
- argv[0], strerror(errno));
- exit(1);
- }
- if (policydb_read(&policydb, &pf, 0)) {
- fprintf(stderr, "%s: invalid binary policy %s\n",
- argv[0], path);
- exit(1);
- }
- fclose(fp);
- sepol_set_policydb(&policydb);
-
- if (!set_path) {
- /* If they didn't specify a full path of a binary policy file,
- then also try loading any boolean settings and user
- definitions from the active locations. Otherwise,
- they can use genpolbools and genpolusers to build a
- binary policy file that includes any desired settings
- and then apply audit2why -p to the resulting file.
- Errors are non-fatal as such settings are optional. */
- sepol_debug(0);
- (void)sepol_genbools_policydb(&policydb,
- selinux_booleans_path());
- (void)sepol_genusers_policydb(&policydb, selinux_users_path());
- }
-
- /* Initialize the sidtab for subsequent use by sepol_context_to_sid
- and sepol_compute_av_reason. */
- rc = sepol_sidtab_init(&sidtab);
- if (rc < 0) {
- fprintf(stderr, "%s: unable to init sidtab\n", argv[0]);
- exit(1);
- }
- sepol_set_sidtab(&sidtab);
-
- /* Process the audit messages. */
- while (getline(&buffer, &len, stdin) > 0) {
- size_t len2 = strlen(buffer);
-
- if (buffer[len2 - 1] == '\n')
- buffer[len2 - 1] = 0;
- lineno++;
-
- p = buffer;
- while (*p && strncmp(p, AVCPREFIX, sizeof(AVCPREFIX) - 1))
- p++;
- if (!(*p))
- continue; /* not an avc denial */
-
- p += sizeof(AVCPREFIX) - 1;
-
- /* Save a copy of the original unmodified buffer. */
- if (!bufcopy) {
- /* Initial allocation */
- bufcopy_len = len;
- bufcopy = malloc(len);
- } else if (bufcopy_len < len) {
- /* Grow */
- bufcopy_len = len;
- bufcopy = realloc(bufcopy, len);
- }
- if (!bufcopy) {
- fprintf(stderr, "%s: OOM on buffer copy\n", argv[0]);
- exit(2);
- }
- memcpy(bufcopy, buffer, len);
-
- /* Remember where the permission list begins,
- and terminate the list. */
- permstr = p;
- while (*p && *p != '}')
- p++;
- if (!(*p)) {
- fprintf(stderr,
- "Missing closing bracket on line %u, skipping...\n",
- lineno);
- continue;
- }
- *p++ = 0;
-
- /* Get scontext and convert to SID. */
- while (*p && strncmp(p, SCONTEXT, sizeof(SCONTEXT) - 1))
- p++;
- if (!(*p)) {
- fprintf(stderr, "Missing %s on line %u, skipping...\n",
- SCONTEXT, lineno);
- continue;
- }
- p += sizeof(SCONTEXT) - 1;
- scon = p;
- while (*p && !isspace(*p))
- p++;
- if (*p)
- *p++ = 0;
- rc = sepol_context_to_sid(scon, strlen(scon) + 1, &ssid);
- if (rc < 0) {
- fprintf(stderr,
- "Invalid %s%s on line %u, skipping...\n",
- SCONTEXT, scon, lineno);
- continue;
- }
-
- /* Get tcontext and convert to SID. */
- while (*p && strncmp(p, TCONTEXT, sizeof(TCONTEXT) - 1))
- p++;
- if (!(*p)) {
- fprintf(stderr, "Missing %s on line %u, skipping...\n",
- TCONTEXT, lineno);
- continue;
- }
- p += sizeof(TCONTEXT) - 1;
- tcon = p;
- while (*p && !isspace(*p))
- p++;
- if (*p)
- *p++ = 0;
- rc = sepol_context_to_sid(tcon, strlen(tcon) + 1, &tsid);
- if (rc < 0) {
- fprintf(stderr,
- "Invalid %s%s on line %u, skipping...\n",
- TCONTEXT, tcon, lineno);
- continue;
- }
-
- /* Get tclass= and convert to value. */
- while (*p && strncmp(p, TCLASS, sizeof(TCLASS) - 1))
- p++;
- if (!(*p)) {
- fprintf(stderr, "Missing %s on line %u, skipping...\n",
- TCLASS, lineno);
- continue;
- }
- p += sizeof(TCLASS) - 1;
- tclassstr = p;
- while (*p && !isspace(*p))
- p++;
- if (*p)
- *p = 0;
- tclass = string_to_security_class(tclassstr);
- if (!tclass) {
- fprintf(stderr,
- "Invalid %s%s on line %u, skipping...\n",
- TCLASS, tclassstr, lineno);
- continue;
- }
-
- /* Convert the permission list to an AV. */
- p = permstr;
- av = 0;
- while (*p) {
- while (*p && !isspace(*p))
- p++;
- if (*p)
- *p++ = 0;
- perm = string_to_av_perm(tclass, permstr);
- if (!perm) {
- fprintf(stderr,
- "Invalid permission %s on line %u, skipping...\n",
- permstr, lineno);
- continue;
- }
- av |= perm;
- permstr = p;
- }
-
- /* Reproduce the computation. */
- rc = sepol_compute_av_reason(ssid, tsid, tclass, av, &avd,
- &reason);
- if (rc < 0) {
- fprintf(stderr,
- "Error during access vector computation on line %u, skipping...\n",
- lineno);
- continue;
- }
-
- printf("%s\n\tWas caused by:\n", bufcopy);
-
- if (!reason) {
- printf("\t\tUnknown - would be allowed by %s policy\n",
- set_path ? "specified" : "active");
- printf
- ("\t\tPossible mismatch between this policy and the one under which the audit message was generated.\n");
- printf
- ("\t\tPossible mismatch between current in-memory boolean settings vs. permanent ones.\n");
- }
-
- if (reason & SEPOL_COMPUTEAV_TE) {
- printf("\t\tMissing or disabled TE allow rule.\n");
- printf
- ("\t\tAllow rules may exist but be disabled by boolean settings; check boolean settings.\n");
- printf
- ("\t\tYou can see the necessary allow rules by running audit2allow with this audit message as input.\n");
- }
-
- if (reason & SEPOL_COMPUTEAV_CONS) {
- printf("\t\tConstraint violation.\n");
- printf("\t\tCheck policy/constraints.\n");
- printf
- ("\t\tTypically, you just need to add a type attribute to the domain to satisfy the constraint.\n");
- }
-
- if (reason & SEPOL_COMPUTEAV_RBAC) {
- printf("\t\tMissing role allow rule.\n");
- printf("\t\tAdd allow rule for the role pair.\n");
- }
-
- printf("\n");
- }
- free(buffer);
- free(bufcopy);
- exit(0);
-}
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