diff options
Diffstat (limited to 'source/n/krb5/patches/krb5-1.15-beta1-selinux-label.patch')
| -rw-r--r-- | source/n/krb5/patches/krb5-1.15-beta1-selinux-label.patch | 1065 |
1 files changed, 1065 insertions, 0 deletions
diff --git a/source/n/krb5/patches/krb5-1.15-beta1-selinux-label.patch b/source/n/krb5/patches/krb5-1.15-beta1-selinux-label.patch new file mode 100644 index 00000000..d743c3be --- /dev/null +++ b/source/n/krb5/patches/krb5-1.15-beta1-selinux-label.patch @@ -0,0 +1,1065 @@ +From a2e0aed3d390ded3a7724fa223a3dc1102ec6221 Mon Sep 17 00:00:00 2001 +From: Robbie Harwood <rharwood@redhat.com> +Date: Tue, 23 Aug 2016 16:30:53 -0400 +Subject: [PATCH] krb5-1.15-beta1-selinux-label.patch + +SELinux bases access to files on the domain of the requesting process, +the operation being performed, and the context applied to the file. + +In many cases, applications needn't be SELinux aware to work properly, +because SELinux can apply a default label to a file based on the label +of the directory in which it's created. + +In the case of files such as /etc/krb5.keytab, however, this isn't +sufficient, as /etc/krb5.keytab will almost always need to be given a +label which differs from that of /etc/issue or /etc/resolv.conf. The +the kdb stash file needs a different label than the database for which +it's holding a master key, even though both typically live in the same +directory. + +To give the file the correct label, we can either force a "restorecon" +call to fix a file's label after it's created, or create the file with +the right label, as we attempt to do here. We lean on THREEPARAMOPEN +and define a similar macro named WRITABLEFOPEN with which we replace +several uses of fopen(). + +The file creation context that we're manipulating here is a process-wide +attribute. While for the most part, applications which need to label +files when they're created have tended to be single-threaded, there's +not much we can do to avoid interfering with an application that +manipulates the creation context directly. Right now we're mediating +access using a library-local mutex, but that can only work for consumers +that are part of this package -- an unsuspecting application will still +stomp all over us. + +The selabel APIs for looking up the context should be thread-safe (per +Red Hat #273081), so switching to using them instead of matchpathcon(), +which we used earlier, is some improvement. +--- + src/aclocal.m4 | 49 +++ + src/build-tools/krb5-config.in | 3 +- + src/config/pre.in | 3 +- + src/configure.in | 2 + + src/include/k5-int.h | 1 + + src/include/k5-label.h | 32 ++ + src/include/krb5/krb5.hin | 6 + + src/kadmin/dbutil/dump.c | 11 +- + src/kdc/main.c | 2 +- + src/lib/kadm5/logger.c | 4 +- + src/lib/kdb/kdb_log.c | 2 +- + src/lib/krb5/ccache/cc_dir.c | 26 +- + src/lib/krb5/keytab/kt_file.c | 4 +- + src/lib/krb5/os/trace.c | 2 +- + src/lib/krb5/rcache/rc_dfl.c | 13 + + src/plugins/kdb/db2/adb_openclose.c | 2 +- + src/plugins/kdb/db2/kdb_db2.c | 4 +- + src/plugins/kdb/db2/libdb2/btree/bt_open.c | 3 +- + src/plugins/kdb/db2/libdb2/hash/hash.c | 3 +- + src/plugins/kdb/db2/libdb2/recno/rec_open.c | 4 +- + .../kdb/ldap/ldap_util/kdb5_ldap_services.c | 11 +- + src/slave/kpropd.c | 9 + + src/util/profile/prof_file.c | 3 +- + src/util/support/Makefile.in | 3 +- + src/util/support/selinux.c | 406 +++++++++++++++++++++ + 25 files changed, 587 insertions(+), 21 deletions(-) + create mode 100644 src/include/k5-label.h + create mode 100644 src/util/support/selinux.c + +diff --git a/src/aclocal.m4 b/src/aclocal.m4 +index 508e5fe..607859f 100644 +--- a/src/aclocal.m4 ++++ b/src/aclocal.m4 +@@ -89,6 +89,7 @@ AC_SUBST_FILE(libnodeps_frag) + dnl + KRB5_AC_PRAGMA_WEAK_REF + WITH_LDAP ++KRB5_WITH_SELINUX + KRB5_LIB_PARAMS + KRB5_AC_INITFINI + KRB5_AC_ENABLE_THREADS +@@ -1742,3 +1743,51 @@ AC_SUBST(PAM_LIBS) + AC_SUBST(PAM_MAN) + AC_SUBST(NON_PAM_MAN) + ])dnl ++dnl ++dnl Use libselinux to set file contexts on newly-created files. ++dnl ++AC_DEFUN(KRB5_WITH_SELINUX,[ ++AC_ARG_WITH(selinux,[AC_HELP_STRING(--with-selinux,[compile with SELinux labeling support])], ++ withselinux="$withval",withselinux=auto) ++old_LIBS="$LIBS" ++if test "$withselinux" != no ; then ++ AC_MSG_RESULT([checking for libselinux...]) ++ SELINUX_LIBS= ++ AC_CHECK_HEADERS(selinux/selinux.h selinux/label.h) ++ if test "x$ac_cv_header_selinux_selinux_h" != xyes ; then ++ if test "$withselinux" = auto ; then ++ AC_MSG_RESULT([Unable to locate selinux/selinux.h.]) ++ withselinux=no ++ else ++ AC_MSG_ERROR([Unable to locate selinux/selinux.h.]) ++ fi ++ fi ++ ++ LIBS= ++ unset ac_cv_func_setfscreatecon ++ AC_CHECK_FUNCS(setfscreatecon selabel_open) ++ if test "x$ac_cv_func_setfscreatecon" = xno ; then ++ AC_CHECK_LIB(selinux,setfscreatecon) ++ unset ac_cv_func_setfscreatecon ++ AC_CHECK_FUNCS(setfscreatecon selabel_open) ++ if test "x$ac_cv_func_setfscreatecon" = xyes ; then ++ SELINUX_LIBS="$LIBS" ++ else ++ if test "$withselinux" = auto ; then ++ AC_MSG_RESULT([Unable to locate libselinux.]) ++ withselinux=no ++ else ++ AC_MSG_ERROR([Unable to locate libselinux.]) ++ fi ++ fi ++ fi ++ if test "$withselinux" != no ; then ++ AC_MSG_NOTICE([building with SELinux labeling support]) ++ AC_DEFINE(USE_SELINUX,1,[Define if Kerberos-aware tools should set SELinux file contexts when creating files.]) ++ SELINUX_LIBS="$LIBS" ++ EXTRA_SUPPORT_SYMS="$EXTRA_SUPPORT_SYMS krb5int_labeled_open krb5int_labeled_fopen krb5int_push_fscreatecon_for krb5int_pop_fscreatecon" ++ fi ++fi ++LIBS="$old_LIBS" ++AC_SUBST(SELINUX_LIBS) ++])dnl +diff --git a/src/build-tools/krb5-config.in b/src/build-tools/krb5-config.in +index f6184da..c17cb5e 100755 +--- a/src/build-tools/krb5-config.in ++++ b/src/build-tools/krb5-config.in +@@ -41,6 +41,7 @@ DL_LIB='@DL_LIB@' + DEFCCNAME='@DEFCCNAME@' + DEFKTNAME='@DEFKTNAME@' + DEFCKTNAME='@DEFCKTNAME@' ++SELINUX_LIBS='@SELINUX_LIBS@' + + LIBS='@LIBS@' + GEN_LIB=@GEN_LIB@ +@@ -255,7 +256,7 @@ if test -n "$do_libs"; then + fi + + # If we ever support a flag to generate output suitable for static +- # linking, we would output "-lkrb5support $GEN_LIB $LIBS $DL_LIB" ++ # linking, we would output "-lkrb5support $GEN_LIB $LIBS $SELINUX_LIBS $DL_LIB" + # here. + + echo $lib_flags +diff --git a/src/config/pre.in b/src/config/pre.in +index e062632..fcea229 100644 +--- a/src/config/pre.in ++++ b/src/config/pre.in +@@ -177,6 +177,7 @@ LD = $(PURE) @LD@ + KRB_INCLUDES = -I$(BUILDTOP)/include -I$(top_srcdir)/include + LDFLAGS = @LDFLAGS@ + LIBS = @LIBS@ ++SELINUX_LIBS=@SELINUX_LIBS@ + + INSTALL=@INSTALL@ + INSTALL_STRIP= +@@ -399,7 +400,7 @@ SUPPORT_LIB = -l$(SUPPORT_LIBNAME) + # HESIOD_LIBS is -lhesiod... + HESIOD_LIBS = @HESIOD_LIBS@ + +-KRB5_BASE_LIBS = $(KRB5_LIB) $(K5CRYPTO_LIB) $(COM_ERR_LIB) $(SUPPORT_LIB) $(GEN_LIB) $(LIBS) $(DL_LIB) ++KRB5_BASE_LIBS = $(KRB5_LIB) $(K5CRYPTO_LIB) $(COM_ERR_LIB) $(SUPPORT_LIB) $(GEN_LIB) $(LIBS) $(SELINUX_LIBS) $(DL_LIB) + KDB5_LIBS = $(KDB5_LIB) $(GSSRPC_LIBS) + GSS_LIBS = $(GSS_KRB5_LIB) + # needs fixing if ever used on Mac OS X! +diff --git a/src/configure.in b/src/configure.in +index daabd12..acf3a45 100644 +--- a/src/configure.in ++++ b/src/configure.in +@@ -1338,6 +1338,8 @@ AC_PATH_PROG(GROFF, groff) + + KRB5_WITH_PAM + ++KRB5_WITH_SELINUX ++ + # Make localedir work in autoconf 2.5x. + if test "${localedir+set}" != set; then + localedir='$(datadir)/locale' +diff --git a/src/include/k5-int.h b/src/include/k5-int.h +index 6499173..173cb02 100644 +--- a/src/include/k5-int.h ++++ b/src/include/k5-int.h +@@ -128,6 +128,7 @@ typedef unsigned char u_char; + + + #include "k5-platform.h" ++#include "k5-label.h" + + #define KRB5_KDB_MAX_LIFE (60*60*24) /* one day */ + #define KRB5_KDB_MAX_RLIFE (60*60*24*7) /* one week */ +diff --git a/src/include/k5-label.h b/src/include/k5-label.h +new file mode 100644 +index 0000000..dfaaa84 +--- /dev/null ++++ b/src/include/k5-label.h +@@ -0,0 +1,32 @@ ++#ifndef _KRB5_LABEL_H ++#define _KRB5_LABEL_H ++ ++#ifdef THREEPARAMOPEN ++#undef THREEPARAMOPEN ++#endif ++#ifdef WRITABLEFOPEN ++#undef WRITABLEFOPEN ++#endif ++ ++/* Wrapper functions which help us create files and directories with the right ++ * context labels. */ ++#ifdef USE_SELINUX ++#include <sys/types.h> ++#include <sys/stat.h> ++#include <fcntl.h> ++#include <stdio.h> ++#include <unistd.h> ++FILE *krb5int_labeled_fopen(const char *path, const char *mode); ++int krb5int_labeled_creat(const char *path, mode_t mode); ++int krb5int_labeled_open(const char *path, int flags, ...); ++int krb5int_labeled_mkdir(const char *path, mode_t mode); ++int krb5int_labeled_mknod(const char *path, mode_t mode, dev_t device); ++#define THREEPARAMOPEN(x,y,z) krb5int_labeled_open(x,y,z) ++#define WRITABLEFOPEN(x,y) krb5int_labeled_fopen(x,y) ++void *krb5int_push_fscreatecon_for(const char *pathname); ++void krb5int_pop_fscreatecon(void *previous); ++#else ++#define WRITABLEFOPEN(x,y) fopen(x,y) ++#define THREEPARAMOPEN(x,y,z) open(x,y,z) ++#endif ++#endif +diff --git a/src/include/krb5/krb5.hin b/src/include/krb5/krb5.hin +index ac22f4c..cf60d6c 100644 +--- a/src/include/krb5/krb5.hin ++++ b/src/include/krb5/krb5.hin +@@ -87,6 +87,12 @@ + #define THREEPARAMOPEN(x,y,z) open(x,y,z) + #endif + ++#if KRB5_PRIVATE ++#ifndef WRITABLEFOPEN ++#define WRITABLEFOPEN(x,y) fopen(x,y) ++#endif ++#endif ++ + #define KRB5_OLD_CRYPTO + + #include <stdlib.h> +diff --git a/src/kadmin/dbutil/dump.c b/src/kadmin/dbutil/dump.c +index f7889bd..cad53cf 100644 +--- a/src/kadmin/dbutil/dump.c ++++ b/src/kadmin/dbutil/dump.c +@@ -148,12 +148,21 @@ create_ofile(char *ofile, char **tmpname) + { + int fd = -1; + FILE *f; ++#ifdef USE_SELINUX ++ void *selabel; ++#endif + + *tmpname = NULL; + if (asprintf(tmpname, "%s-XXXXXX", ofile) < 0) + goto error; + ++#ifdef USE_SELINUX ++ selabel = krb5int_push_fscreatecon_for(ofile); ++#endif + fd = mkstemp(*tmpname); ++#ifdef USE_SELINUX ++ krb5int_pop_fscreatecon(selabel); ++#endif + if (fd == -1) + goto error; + +@@ -194,7 +203,7 @@ prep_ok_file(krb5_context context, char *file_name, int *fd) + return 0; + } + +- *fd = open(file_ok, O_WRONLY | O_CREAT | O_TRUNC, 0600); ++ *fd = THREEPARAMOPEN(file_ok, O_WRONLY | O_CREAT | O_TRUNC, 0600); + if (*fd == -1) { + com_err(progname, errno, _("while creating 'ok' file, '%s'"), file_ok); + exit_status++; +diff --git a/src/kdc/main.c b/src/kdc/main.c +index ebc852b..a4dffb2 100644 +--- a/src/kdc/main.c ++++ b/src/kdc/main.c +@@ -872,7 +872,7 @@ write_pid_file(const char *path) + FILE *file; + unsigned long pid; + +- file = fopen(path, "w"); ++ file = WRITABLEFOPEN(path, "w"); + if (file == NULL) + return errno; + pid = (unsigned long) getpid(); +diff --git a/src/lib/kadm5/logger.c b/src/lib/kadm5/logger.c +index ce79fab..c53a574 100644 +--- a/src/lib/kadm5/logger.c ++++ b/src/lib/kadm5/logger.c +@@ -414,7 +414,7 @@ krb5_klog_init(krb5_context kcontext, char *ename, char *whoami, krb5_boolean do + */ + append = (cp[4] == ':') ? O_APPEND : 0; + if (append || cp[4] == '=') { +- fd = open(&cp[5], O_CREAT | O_WRONLY | append, ++ fd = THREEPARAMOPEN(&cp[5], O_CREAT | O_WRONLY | append, + S_IRUSR | S_IWUSR | S_IRGRP); + if (fd != -1) + f = fdopen(fd, append ? "a" : "w"); +@@ -918,7 +918,7 @@ krb5_klog_reopen(krb5_context kcontext) + * In case the old logfile did not get moved out of the + * way, open for append to prevent squashing the old logs. + */ +- f = fopen(log_control.log_entries[lindex].lfu_fname, "a+"); ++ f = WRITABLEFOPEN(log_control.log_entries[lindex].lfu_fname, "a+"); + if (f) { + set_cloexec_file(f); + log_control.log_entries[lindex].lfu_filep = f; +diff --git a/src/lib/kdb/kdb_log.c b/src/lib/kdb/kdb_log.c +index 766d300..6466417 100644 +--- a/src/lib/kdb/kdb_log.c ++++ b/src/lib/kdb/kdb_log.c +@@ -476,7 +476,7 @@ ulog_map(krb5_context context, const char *logname, uint32_t ulogentries) + int ulogfd = -1; + + if (stat(logname, &st) == -1) { +- ulogfd = open(logname, O_RDWR | O_CREAT, 0600); ++ ulogfd = THREEPARAMOPEN(logname, O_RDWR | O_CREAT, 0600); + if (ulogfd == -1) + return errno; + +diff --git a/src/lib/krb5/ccache/cc_dir.c b/src/lib/krb5/ccache/cc_dir.c +index bba64e5..73f0fe6 100644 +--- a/src/lib/krb5/ccache/cc_dir.c ++++ b/src/lib/krb5/ccache/cc_dir.c +@@ -183,10 +183,19 @@ write_primary_file(const char *primary_path, const char *contents) + char *newpath = NULL; + FILE *fp = NULL; + int fd = -1, status; ++#ifdef USE_SELINUX ++ void *selabel; ++#endif + + if (asprintf(&newpath, "%s.XXXXXX", primary_path) < 0) + return ENOMEM; ++#ifdef USE_SELINUX ++ selabel = krb5int_push_fscreatecon_for(primary_path); ++#endif + fd = mkstemp(newpath); ++#ifdef USE_SELINUX ++ krb5int_pop_fscreatecon(selabel); ++#endif + if (fd < 0) + goto cleanup; + #ifdef HAVE_CHMOD +@@ -221,10 +230,23 @@ static krb5_error_code + verify_dir(krb5_context context, const char *dirname) + { + struct stat st; ++ int status; ++#ifdef USE_SELINUX ++ void *selabel; ++#endif + + if (stat(dirname, &st) < 0) { +- if (errno == ENOENT && mkdir(dirname, S_IRWXU) == 0) +- return 0; ++ if (errno == ENOENT) { ++#ifdef USE_SELINUX ++ selabel = krb5int_push_fscreatecon_for(dirname); ++#endif ++ status = mkdir(dirname, S_IRWXU); ++#ifdef USE_SELINUX ++ krb5int_pop_fscreatecon(selabel); ++#endif ++ if (status == 0) ++ return 0; ++ } + k5_setmsg(context, KRB5_FCC_NOFILE, + _("Credential cache directory %s does not exist"), + dirname); +diff --git a/src/lib/krb5/keytab/kt_file.c b/src/lib/krb5/keytab/kt_file.c +index 6a42f26..674d88b 100644 +--- a/src/lib/krb5/keytab/kt_file.c ++++ b/src/lib/krb5/keytab/kt_file.c +@@ -1022,14 +1022,14 @@ krb5_ktfileint_open(krb5_context context, krb5_keytab id, int mode) + + KTCHECKLOCK(id); + errno = 0; +- KTFILEP(id) = fopen(KTFILENAME(id), ++ KTFILEP(id) = WRITABLEFOPEN(KTFILENAME(id), + (mode == KRB5_LOCKMODE_EXCLUSIVE) ? "rb+" : "rb"); + if (!KTFILEP(id)) { + if ((mode == KRB5_LOCKMODE_EXCLUSIVE) && (errno == ENOENT)) { + /* try making it first time around */ + k5_create_secure_file(context, KTFILENAME(id)); + errno = 0; +- KTFILEP(id) = fopen(KTFILENAME(id), "rb+"); ++ KTFILEP(id) = WRITABLEFOPEN(KTFILENAME(id), "rb+"); + if (!KTFILEP(id)) + goto report_errno; + writevno = 1; +diff --git a/src/lib/krb5/os/trace.c b/src/lib/krb5/os/trace.c +index 83c8d4d..a192461 100644 +--- a/src/lib/krb5/os/trace.c ++++ b/src/lib/krb5/os/trace.c +@@ -397,7 +397,7 @@ krb5_set_trace_filename(krb5_context context, const char *filename) + fd = malloc(sizeof(*fd)); + if (fd == NULL) + return ENOMEM; +- *fd = open(filename, O_WRONLY|O_CREAT|O_APPEND, 0600); ++ *fd = THREEPARAMOPEN(filename, O_WRONLY|O_CREAT|O_APPEND, 0600); + if (*fd == -1) { + free(fd); + return errno; +diff --git a/src/lib/krb5/rcache/rc_dfl.c b/src/lib/krb5/rcache/rc_dfl.c +index c4d2c74..c0f12ed 100644 +--- a/src/lib/krb5/rcache/rc_dfl.c ++++ b/src/lib/krb5/rcache/rc_dfl.c +@@ -794,6 +794,9 @@ krb5_rc_dfl_expunge_locked(krb5_context context, krb5_rcache id) + krb5_error_code retval = 0; + krb5_rcache tmp; + krb5_deltat lifespan = t->lifespan; /* save original lifespan */ ++#ifdef USE_SELINUX ++ void *selabel; ++#endif + + if (! t->recovering) { + name = t->name; +@@ -815,7 +818,17 @@ krb5_rc_dfl_expunge_locked(krb5_context context, krb5_rcache id) + retval = krb5_rc_resolve(context, tmp, 0); + if (retval) + goto cleanup; ++#ifdef USE_SELINUX ++ if (t->d.fn != NULL) ++ selabel = krb5int_push_fscreatecon_for(t->d.fn); ++ else ++ selabel = NULL; ++#endif + retval = krb5_rc_initialize(context, tmp, lifespan); ++#ifdef USE_SELINUX ++ if (selabel != NULL) ++ krb5int_pop_fscreatecon(selabel); ++#endif + if (retval) + goto cleanup; + for (q = t->a; q; q = q->na) { +diff --git a/src/plugins/kdb/db2/adb_openclose.c b/src/plugins/kdb/db2/adb_openclose.c +index 7db30a3..2b9d019 100644 +--- a/src/plugins/kdb/db2/adb_openclose.c ++++ b/src/plugins/kdb/db2/adb_openclose.c +@@ -152,7 +152,7 @@ osa_adb_init_db(osa_adb_db_t *dbp, char *filename, char *lockfilename, + * needs be open read/write so that write locking can work with + * POSIX systems + */ +- if ((lockp->lockinfo.lockfile = fopen(lockfilename, "r+")) == NULL) { ++ if ((lockp->lockinfo.lockfile = WRITABLEFOPEN(lockfilename, "r+")) == NULL) { + /* + * maybe someone took away write permission so we could only + * get shared locks? +diff --git a/src/plugins/kdb/db2/kdb_db2.c b/src/plugins/kdb/db2/kdb_db2.c +index 4c4036e..d90bdea 100644 +--- a/src/plugins/kdb/db2/kdb_db2.c ++++ b/src/plugins/kdb/db2/kdb_db2.c +@@ -694,8 +694,8 @@ ctx_create_db(krb5_context context, krb5_db2_context *dbc) + if (retval) + return retval; + +- dbc->db_lf_file = open(dbc->db_lf_name, O_CREAT | O_RDWR | O_TRUNC, +- 0600); ++ dbc->db_lf_file = THREEPARAMOPEN(dbc->db_lf_name, ++ O_CREAT | O_RDWR | O_TRUNC, 0600); + if (dbc->db_lf_file < 0) { + retval = errno; + goto cleanup; +diff --git a/src/plugins/kdb/db2/libdb2/btree/bt_open.c b/src/plugins/kdb/db2/libdb2/btree/bt_open.c +index 2977b17..d5809a5 100644 +--- a/src/plugins/kdb/db2/libdb2/btree/bt_open.c ++++ b/src/plugins/kdb/db2/libdb2/btree/bt_open.c +@@ -60,6 +60,7 @@ static char sccsid[] = "@(#)bt_open.c 8.11 (Berkeley) 11/2/95"; + #include <string.h> + #include <unistd.h> + ++#include "k5-int.h" + #include "db-int.h" + #include "btree.h" + +@@ -203,7 +204,7 @@ __bt_open(fname, flags, mode, openinfo, dflags) + goto einval; + } + +- if ((t->bt_fd = open(fname, flags | O_BINARY, mode)) < 0) ++ if ((t->bt_fd = THREEPARAMOPEN(fname, flags | O_BINARY, mode)) < 0) + goto err; + + } else { +diff --git a/src/plugins/kdb/db2/libdb2/hash/hash.c b/src/plugins/kdb/db2/libdb2/hash/hash.c +index 76f5d47..1fa8b83 100644 +--- a/src/plugins/kdb/db2/libdb2/hash/hash.c ++++ b/src/plugins/kdb/db2/libdb2/hash/hash.c +@@ -51,6 +51,7 @@ static char sccsid[] = "@(#)hash.c 8.12 (Berkeley) 11/7/95"; + #include <assert.h> + #endif + ++#include "k5-int.h" + #include "db-int.h" + #include "hash.h" + #include "page.h" +@@ -140,7 +141,7 @@ __kdb2_hash_open(file, flags, mode, info, dflags) + new_table = 1; + } + if (file) { +- if ((hashp->fp = open(file, flags|O_BINARY, mode)) == -1) ++ if ((hashp->fp = THREEPARAMOPEN(file, flags|O_BINARY, mode)) == -1) + RETURN_ERROR(errno, error0); + (void)fcntl(hashp->fp, F_SETFD, 1); + } +diff --git a/src/plugins/kdb/db2/libdb2/recno/rec_open.c b/src/plugins/kdb/db2/libdb2/recno/rec_open.c +index d8b26e7..b0daa7c 100644 +--- a/src/plugins/kdb/db2/libdb2/recno/rec_open.c ++++ b/src/plugins/kdb/db2/libdb2/recno/rec_open.c +@@ -51,6 +51,7 @@ static char sccsid[] = "@(#)rec_open.c 8.12 (Berkeley) 11/18/94"; + #include <stdio.h> + #include <unistd.h> + ++#include "k5-int.h" + #include "db-int.h" + #include "recno.h" + +@@ -68,7 +69,8 @@ __rec_open(fname, flags, mode, openinfo, dflags) + int rfd = -1, sverrno; + + /* Open the user's file -- if this fails, we're done. */ +- if (fname != NULL && (rfd = open(fname, flags | O_BINARY, mode)) < 0) ++ if (fname != NULL && ++ (rfd = THREEPARAMOPEN(fname, flags | O_BINARY, mode)) < 0) + return (NULL); + + if (fname != NULL && fcntl(rfd, F_SETFD, 1) == -1) { +diff --git a/src/plugins/kdb/ldap/ldap_util/kdb5_ldap_services.c b/src/plugins/kdb/ldap/ldap_util/kdb5_ldap_services.c +index 022156a..3d6994c 100644 +--- a/src/plugins/kdb/ldap/ldap_util/kdb5_ldap_services.c ++++ b/src/plugins/kdb/ldap/ldap_util/kdb5_ldap_services.c +@@ -203,7 +203,7 @@ kdb5_ldap_stash_service_password(int argc, char **argv) + + /* set password in the file */ + old_mode = umask(0177); +- pfile = fopen(file_name, "a+"); ++ pfile = WRITABLEFOPEN(file_name, "a+"); + if (pfile == NULL) { + com_err(me, errno, _("Failed to open file %s: %s"), file_name, + strerror (errno)); +@@ -244,6 +244,9 @@ kdb5_ldap_stash_service_password(int argc, char **argv) + * Delete the existing entry and add the new entry + */ + FILE *newfile; ++#ifdef USE_SELINUX ++ void *selabel; ++#endif + + mode_t omask; + +@@ -255,7 +258,13 @@ kdb5_ldap_stash_service_password(int argc, char **argv) + } + + omask = umask(077); ++#ifdef USE_SELINUX ++ selabel = krb5int_push_fscreatecon_for(file_name); ++#endif + newfile = fopen(tmp_file, "w"); ++#ifdef USE_SELINUX ++ krb5int_pop_fscreatecon(selabel); ++#endif + umask (omask); + if (newfile == NULL) { + com_err(me, errno, _("Error creating file %s"), tmp_file); +diff --git a/src/slave/kpropd.c b/src/slave/kpropd.c +index 056c31a..b78c3d9 100644 +--- a/src/slave/kpropd.c ++++ b/src/slave/kpropd.c +@@ -464,6 +464,9 @@ doit(int fd) + krb5_enctype etype; + int database_fd; + char host[INET6_ADDRSTRLEN + 1]; ++#ifdef USE_SELINUX ++ void *selabel; ++#endif + + signal_wrapper(SIGALRM, alarm_handler); + alarm(params.iprop_resync_timeout); +@@ -520,9 +523,15 @@ doit(int fd) + free(name); + exit(1); + } ++#ifdef USE_SELINUX ++ selabel = krb5int_push_fscreatecon_for(file); ++#endif + omask = umask(077); + lock_fd = open(temp_file_name, O_RDWR | O_CREAT, 0600); + (void)umask(omask); ++#ifdef USE_SELINUX ++ krb5int_pop_fscreatecon(selabel); ++#endif + retval = krb5_lock_file(kpropd_context, lock_fd, + KRB5_LOCKMODE_EXCLUSIVE | KRB5_LOCKMODE_DONTBLOCK); + if (retval) { +diff --git a/src/util/profile/prof_file.c b/src/util/profile/prof_file.c +index 907c119..0f5462a 100644 +--- a/src/util/profile/prof_file.c ++++ b/src/util/profile/prof_file.c +@@ -33,6 +33,7 @@ + #endif + + #include "k5-platform.h" ++#include "k5-label.h" + + struct global_shared_profile_data { + /* This is the head of the global list of shared trees */ +@@ -423,7 +424,7 @@ static errcode_t write_data_to_file(prf_data_t data, const char *outfile, + + errno = 0; + +- f = fopen(new_file, "w"); ++ f = WRITABLEFOPEN(new_file, "w"); + if (!f) { + retval = errno; + if (retval == 0) +diff --git a/src/util/support/Makefile.in b/src/util/support/Makefile.in +index 6239e41..17bcd2a 100644 +--- a/src/util/support/Makefile.in ++++ b/src/util/support/Makefile.in +@@ -69,6 +69,7 @@ IPC_SYMS= \ + + STLIBOBJS= \ + threads.o \ ++ selinux.o \ + init-addrinfo.o \ + plugins.o \ + errors.o \ +@@ -148,7 +149,7 @@ SRCS=\ + + SHLIB_EXPDEPS = + # Add -lm if dumping thread stats, for sqrt. +-SHLIB_EXPLIBS= $(LIBS) $(DL_LIB) ++SHLIB_EXPLIBS= $(LIBS) $(SELINUX_LIBS) $(DL_LIB) + + DEPLIBS= + +diff --git a/src/util/support/selinux.c b/src/util/support/selinux.c +new file mode 100644 +index 0000000..2302634 +--- /dev/null ++++ b/src/util/support/selinux.c +@@ -0,0 +1,406 @@ ++/* ++ * Copyright 2007,2008,2009,2011,2012,2013,2016 Red Hat, Inc. All Rights Reserved. ++ * ++ * Redistribution and use in source and binary forms, with or without ++ * modification, are permitted provided that the following conditions are met: ++ * ++ * Redistributions of source code must retain the above copyright notice, this ++ * list of conditions and the following disclaimer. ++ * ++ * Redistributions in binary form must reproduce the above copyright notice, ++ * this list of conditions and the following disclaimer in the documentation ++ * and/or other materials provided with the distribution. ++ * ++ * Neither the name of Red Hat, Inc. nor the names of its contributors may be ++ * used to endorse or promote products derived from this software without ++ * specific prior written permission. ++ * ++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" ++ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE ++ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ++ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE ++ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR ++ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF ++ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS ++ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN ++ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ++ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE ++ * POSSIBILITY OF SUCH DAMAGE. ++ * ++ * File-opening wrappers for creating correctly-labeled files. So far, we can ++ * assume that this is Linux-specific, so we make many simplifying assumptions. ++ */ ++ ++#include "../../include/autoconf.h" ++ ++#ifdef USE_SELINUX ++ ++#include <k5-label.h> ++#include <k5-platform.h> ++ ++#include <sys/types.h> ++#include <sys/stat.h> ++ ++#include <errno.h> ++#include <fcntl.h> ++#include <limits.h> ++#include <pthread.h> ++#include <stdarg.h> ++#include <stdio.h> ++#include <stdlib.h> ++#include <string.h> ++#include <unistd.h> ++ ++#include <selinux/selinux.h> ++#include <selinux/context.h> ++#include <selinux/label.h> ++ ++/* #define DEBUG 1 */ ++static void ++debug_log(const char *fmt, ...) ++{ ++#ifdef DEBUG ++ va_list ap; ++ va_start(ap, str); ++ if (isatty(fileno(stderr))) { ++ vfprintf(stderr, fmt, ap); ++ } ++ va_end(ap); ++#endif ++ ++ return; ++} ++ ++/* Mutex used to serialize use of the process-global file creation context. */ ++k5_mutex_t labeled_mutex = K5_MUTEX_PARTIAL_INITIALIZER; ++ ++/* Make sure we finish initializing that mutex before attempting to use it. */ ++k5_once_t labeled_once = K5_ONCE_INIT; ++static void ++label_mutex_init(void) ++{ ++ k5_mutex_finish_init(&labeled_mutex); ++} ++ ++static struct selabel_handle *selabel_ctx; ++static time_t selabel_last_changed; ++ ++MAKE_FINI_FUNCTION(cleanup_fscreatecon); ++ ++static void ++cleanup_fscreatecon(void) ++{ ++ if (selabel_ctx != NULL) { ++ selabel_close(selabel_ctx); ++ selabel_ctx = NULL; ++ } ++} ++ ++static security_context_t ++push_fscreatecon(const char *pathname, mode_t mode) ++{ ++ security_context_t previous, configuredsc, currentsc, derivedsc; ++ context_t current, derived; ++ const char *fullpath, *currentuser; ++ char *genpath; ++ ++ previous = configuredsc = currentsc = derivedsc = NULL; ++ current = derived = NULL; ++ genpath = NULL; ++ ++ fullpath = pathname; ++ ++ if (!is_selinux_enabled()) { ++ goto fail; ++ } ++ ++ if (getfscreatecon(&previous) != 0) { ++ goto fail; ++ } ++ ++ /* Canonicalize pathname */ ++ if (pathname[0] != '/') { ++ char *wd; ++ size_t len; ++ len = 0; ++ ++ wd = getcwd(NULL, len); ++ if (wd == NULL) { ++ goto fail; ++ } ++ ++ len = strlen(wd) + 1 + strlen(pathname) + 1; ++ genpath = malloc(len); ++ if (genpath == NULL) { ++ free(wd); ++ goto fail; ++ } ++ ++ sprintf(genpath, "%s/%s", wd, pathname); ++ free(wd); ++ fullpath = genpath; ++ } ++ ++ debug_log("Looking up context for \"%s\"(%05o).\n", fullpath, mode); ++ ++ /* Check whether context file has changed under us */ ++ if (selabel_ctx != NULL || selabel_last_changed == 0) { ++ const char *cpath; ++ struct stat st; ++ int i = -1; ++ ++ cpath = selinux_file_context_path(); ++ if (cpath == NULL || (i = stat(cpath, &st)) != 0 || ++ st.st_mtime != selabel_last_changed) { ++ cleanup_fscreatecon(); ++ ++ selabel_last_changed = i ? time(NULL) : st.st_mtime; ++ } ++ } ++ ++ if (selabel_ctx == NULL) { ++ selabel_ctx = selabel_open(SELABEL_CTX_FILE, NULL, 0); ++ } ++ ++ if (selabel_ctx != NULL && ++ selabel_lookup(selabel_ctx, &configuredsc, fullpath, mode) != 0) { ++ goto fail; ++ } ++ ++ if (genpath != NULL) { ++ free(genpath); ++ genpath = NULL; ++ } ++ ++ if (configuredsc == NULL) { ++ goto fail; ++ } ++ ++ getcon(¤tsc); ++ ++ /* AAAAAAAA */ ++ if (currentsc != NULL) { ++ derived = context_new(configuredsc); ++ ++ if (derived != NULL) { ++ current = context_new(currentsc); ++ ++ if (current != NULL) { ++ currentuser = context_user_get(current); ++ ++ if (currentuser != NULL) { ++ if (context_user_set(derived, ++ currentuser) == 0) { ++ derivedsc = context_str(derived); ++ ++ if (derivedsc != NULL) { ++ freecon(configuredsc); ++ configuredsc = strdup(derivedsc); ++ } ++ } ++ } ++ ++ context_free(current); ++ } ++ ++ context_free(derived); ++ } ++ ++ freecon(currentsc); ++ } ++ ++ debug_log("Setting file creation context to \"%s\".\n", configuredsc); ++ if (setfscreatecon(configuredsc) != 0) { ++ debug_log("Unable to determine current context.\n"); ++ goto fail; ++ } ++ ++ freecon(configuredsc); ++ return previous; ++ ++fail: ++ if (previous != NULL) { ++ freecon(previous); ++ } ++ if (genpath != NULL) { ++ free(genpath); ++ } ++ if (configuredsc != NULL) { ++ freecon(configuredsc); ++ } ++ ++ cleanup_fscreatecon(); ++ return NULL; ++} ++ ++static void ++pop_fscreatecon(security_context_t previous) ++{ ++ if (!is_selinux_enabled()) { ++ return; ++ } ++ ++ if (previous != NULL) { ++ debug_log("Resetting file creation context to \"%s\".\n", previous); ++ } else { ++ debug_log("Resetting file creation context to default.\n"); ++ } ++ ++ /* NULL resets to default */ ++ setfscreatecon(previous); ++ ++ if (previous != NULL) { ++ freecon(previous); ++ } ++ ++ /* Need to clean this up here otherwise it leaks */ ++ cleanup_fscreatecon(); ++} ++ ++void * ++krb5int_push_fscreatecon_for(const char *pathname) ++{ ++ struct stat st; ++ void *retval; ++ ++ k5_once(&labeled_once, label_mutex_init); ++ k5_mutex_lock(&labeled_mutex); ++ ++ if (stat(pathname, &st) != 0) { ++ st.st_mode = S_IRUSR | S_IWUSR; ++ } ++ ++ retval = push_fscreatecon(pathname, st.st_mode); ++ return retval ? retval : (void *) -1; ++} ++ ++void ++krb5int_pop_fscreatecon(void *con) ++{ ++ if (con != NULL) { ++ pop_fscreatecon((con == (void *) -1) ? NULL : con); ++ k5_mutex_unlock(&labeled_mutex); ++ } ++} ++ ++FILE * ++krb5int_labeled_fopen(const char *path, const char *mode) ++{ ++ FILE *fp; ++ int errno_save; ++ security_context_t ctx; ++ ++ if ((strcmp(mode, "r") == 0) || ++ (strcmp(mode, "rb") == 0)) { ++ return fopen(path, mode); ++ } ++ ++ k5_once(&labeled_once, label_mutex_init); ++ k5_mutex_lock(&labeled_mutex); ++ ctx = push_fscreatecon(path, 0); ++ ++ fp = fopen(path, mode); ++ errno_save = errno; ++ ++ pop_fscreatecon(ctx); ++ k5_mutex_unlock(&labeled_mutex); ++ ++ errno = errno_save; ++ return fp; ++} ++ ++int ++krb5int_labeled_creat(const char *path, mode_t mode) ++{ ++ int fd; ++ int errno_save; ++ security_context_t ctx; ++ ++ k5_once(&labeled_once, label_mutex_init); ++ k5_mutex_lock(&labeled_mutex); ++ ctx = push_fscreatecon(path, 0); ++ ++ fd = creat(path, mode); ++ errno_save = errno; ++ ++ pop_fscreatecon(ctx); ++ k5_mutex_unlock(&labeled_mutex); ++ ++ errno = errno_save; ++ return fd; ++} ++ ++int ++krb5int_labeled_mknod(const char *path, mode_t mode, dev_t dev) ++{ ++ int ret; ++ int errno_save; ++ security_context_t ctx; ++ ++ k5_once(&labeled_once, label_mutex_init); ++ k5_mutex_lock(&labeled_mutex); ++ ctx = push_fscreatecon(path, mode); ++ ++ ret = mknod(path, mode, dev); ++ errno_save = errno; ++ ++ pop_fscreatecon(ctx); ++ k5_mutex_unlock(&labeled_mutex); ++ ++ errno = errno_save; ++ return ret; ++} ++ ++int ++krb5int_labeled_mkdir(const char *path, mode_t mode) ++{ ++ int ret; ++ int errno_save; ++ security_context_t ctx; ++ ++ k5_once(&labeled_once, label_mutex_init); ++ k5_mutex_lock(&labeled_mutex); ++ ctx = push_fscreatecon(path, S_IFDIR); ++ ++ ret = mkdir(path, mode); ++ errno_save = errno; ++ ++ pop_fscreatecon(ctx); ++ k5_mutex_unlock(&labeled_mutex); ++ ++ errno = errno_save; ++ return ret; ++} ++ ++int ++krb5int_labeled_open(const char *path, int flags, ...) ++{ ++ int fd; ++ int errno_save; ++ security_context_t ctx; ++ mode_t mode; ++ va_list ap; ++ ++ if ((flags & O_CREAT) == 0) { ++ return open(path, flags); ++ } ++ ++ k5_once(&labeled_once, label_mutex_init); ++ k5_mutex_lock(&labeled_mutex); ++ ctx = push_fscreatecon(path, 0); ++ ++ va_start(ap, flags); ++ mode = va_arg(ap, mode_t); ++ fd = open(path, flags, mode); ++ va_end(ap); ++ ++ errno_save = errno; ++ ++ pop_fscreatecon(ctx); ++ k5_mutex_unlock(&labeled_mutex); ++ ++ errno = errno_save; ++ return fd; ++} ++ ++#endif /* USE_SELINUX */ |