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778 lines
22 KiB
778 lines
22 KiB
6 months ago
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From d7be72b066a9b07f0426780c7931614eddf9dd9e Mon Sep 17 00:00:00 2001
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From: Robbie Harwood <rharwood@redhat.com>
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Date: Tue, 23 Aug 2016 16:29:58 -0400
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Subject: [PATCH] [downstream] ksu pam integration
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Modify ksu so that it performs account and session management on behalf of
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the target user account, mimicking the action of regular su. The default
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service name is "ksu", because on Fedora at least the configuration used
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is determined by whether or not a login shell is being opened, and so
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this may need to vary, too. At run-time, ksu's behavior can be reset to
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the earlier, non-PAM behavior by setting "use_pam" to false in the [ksu]
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section of /etc/krb5.conf.
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When enabled, ksu gains a dependency on libpam.
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Originally RT#5939, though it's changed since then to perform the account
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and session management before dropping privileges, and to apply on top of
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changes we're proposing for how it handles cache collections.
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Last-updated: krb5-1.18-beta1
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---
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src/aclocal.m4 | 69 +++++++
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src/clients/ksu/Makefile.in | 8 +-
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src/clients/ksu/main.c | 88 +++++++-
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src/clients/ksu/pam.c | 389 ++++++++++++++++++++++++++++++++++++
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src/clients/ksu/pam.h | 57 ++++++
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src/configure.ac | 2 +
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6 files changed, 610 insertions(+), 3 deletions(-)
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create mode 100644 src/clients/ksu/pam.c
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create mode 100644 src/clients/ksu/pam.h
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diff --git a/src/aclocal.m4 b/src/aclocal.m4
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index 3d66a876b3..ce3c5a9bac 100644
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--- a/src/aclocal.m4
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+++ b/src/aclocal.m4
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@@ -1458,3 +1458,72 @@ if test "$with_ldap" = yes; then
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OPENLDAP_PLUGIN=yes
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fi
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])dnl
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+dnl
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+dnl
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+dnl Use PAM instead of local crypt() compare for checking local passwords,
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+dnl and perform PAM account, session management, and password-changing where
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+dnl appropriate.
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+dnl
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+AC_DEFUN(KRB5_WITH_PAM,[
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+AC_ARG_WITH(pam,[AC_HELP_STRING(--with-pam,[compile with PAM support])],
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+ withpam="$withval",withpam=auto)
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+AC_ARG_WITH(pam-ksu-service,[AC_HELP_STRING(--with-ksu-service,[PAM service name for ksu ["ksu"]])],
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+ withksupamservice="$withval",withksupamservice=ksu)
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+old_LIBS="$LIBS"
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+if test "$withpam" != no ; then
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+ AC_MSG_RESULT([checking for PAM...])
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+ PAM_LIBS=
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+
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+ AC_CHECK_HEADERS(security/pam_appl.h)
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+ if test "x$ac_cv_header_security_pam_appl_h" != xyes ; then
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+ if test "$withpam" = auto ; then
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+ AC_MSG_RESULT([Unable to locate security/pam_appl.h.])
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+ withpam=no
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+ else
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+ AC_MSG_ERROR([Unable to locate security/pam_appl.h.])
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+ fi
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+ fi
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+
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+ LIBS=
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+ unset ac_cv_func_pam_start
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+ AC_CHECK_FUNCS(putenv pam_start)
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+ if test "x$ac_cv_func_pam_start" = xno ; then
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+ unset ac_cv_func_pam_start
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+ AC_CHECK_LIB(dl,dlopen)
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+ AC_CHECK_FUNCS(pam_start)
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+ if test "x$ac_cv_func_pam_start" = xno ; then
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+ AC_CHECK_LIB(pam,pam_start)
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+ unset ac_cv_func_pam_start
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+ unset ac_cv_func_pam_getenvlist
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+ AC_CHECK_FUNCS(pam_start pam_getenvlist)
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+ if test "x$ac_cv_func_pam_start" = xyes ; then
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+ PAM_LIBS="$LIBS"
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+ else
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+ if test "$withpam" = auto ; then
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+ AC_MSG_RESULT([Unable to locate libpam.])
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+ withpam=no
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+ else
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+ AC_MSG_ERROR([Unable to locate libpam.])
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+ fi
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+ fi
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+ fi
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+ fi
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+ if test "$withpam" != no ; then
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+ AC_MSG_NOTICE([building with PAM support])
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+ AC_DEFINE(USE_PAM,1,[Define if Kerberos-aware tools should support PAM])
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+ AC_DEFINE_UNQUOTED(KSU_PAM_SERVICE,"$withksupamservice",
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+ [Define to the name of the PAM service name to be used by ksu.])
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+ PAM_LIBS="$LIBS"
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+ NON_PAM_MAN=".\\\" "
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+ PAM_MAN=
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+ else
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+ PAM_MAN=".\\\" "
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+ NON_PAM_MAN=
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+ fi
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+fi
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+LIBS="$old_LIBS"
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+AC_SUBST(PAM_LIBS)
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+AC_SUBST(PAM_MAN)
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+AC_SUBST(NON_PAM_MAN)
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+])dnl
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+
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diff --git a/src/clients/ksu/Makefile.in b/src/clients/ksu/Makefile.in
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index 8b4edce4d8..9d58f29b5d 100644
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--- a/src/clients/ksu/Makefile.in
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+++ b/src/clients/ksu/Makefile.in
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@@ -3,12 +3,14 @@ BUILDTOP=$(REL)..$(S)..
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DEFINES = -DGET_TGT_VIA_PASSWD -DPRINC_LOOK_AHEAD -DCMD_PATH='"/usr/local/sbin /usr/local/bin /sbin /bin /usr/sbin /usr/bin"'
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KSU_LIBS=@KSU_LIBS@
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+PAM_LIBS=@PAM_LIBS@
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SRCS = \
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$(srcdir)/krb_auth_su.c \
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$(srcdir)/ccache.c \
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$(srcdir)/authorization.c \
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$(srcdir)/main.c \
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+ $(srcdir)/pam.c \
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$(srcdir)/heuristic.c \
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$(srcdir)/xmalloc.c \
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$(srcdir)/setenv.c
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@@ -17,13 +19,17 @@ OBJS = \
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ccache.o \
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authorization.o \
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main.o \
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+ pam.o \
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heuristic.o \
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xmalloc.o @SETENVOBJ@
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all: ksu
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ksu: $(OBJS) $(KRB5_BASE_DEPLIBS)
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- $(CC_LINK) -o $@ $(OBJS) $(KRB5_BASE_LIBS) $(KSU_LIBS)
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+ $(CC_LINK) -o $@ $(OBJS) $(KRB5_BASE_LIBS) $(KSU_LIBS) $(PAM_LIBS)
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+
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+pam.o: pam.c
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+ $(CC) $(ALL_CFLAGS) -c $<
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clean:
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$(RM) ksu
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diff --git a/src/clients/ksu/main.c b/src/clients/ksu/main.c
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index af12861729..931f054041 100644
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--- a/src/clients/ksu/main.c
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+++ b/src/clients/ksu/main.c
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@@ -26,6 +26,7 @@
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* KSU was written by: Ari Medvinsky, ari@isi.edu
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*/
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+#include "autoconf.h"
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#include "ksu.h"
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#include "adm_proto.h"
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#include <sys/types.h>
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@@ -33,6 +34,10 @@
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#include <signal.h>
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#include <grp.h>
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+#ifdef USE_PAM
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+#include "pam.h"
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+#endif
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+
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/* globals */
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char * prog_name;
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int auth_debug =0;
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@@ -40,6 +45,7 @@ char k5login_path[MAXPATHLEN];
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char k5users_path[MAXPATHLEN];
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char * gb_err = NULL;
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int quiet = 0;
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+int force_fork = 0;
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/***********/
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#define KS_TEMPORARY_CACHE "MEMORY:_ksu"
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@@ -536,6 +542,23 @@ main (argc, argv)
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prog_name,target_user,client_name,
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source_user,ontty());
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+#ifdef USE_PAM
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+ if (appl_pam_enabled(ksu_context, "ksu")) {
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+ if (appl_pam_acct_mgmt(KSU_PAM_SERVICE, 1, target_user, NULL,
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+ NULL, source_user,
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+ ttyname(STDERR_FILENO)) != 0) {
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+ fprintf(stderr, "Access denied for %s.\n", target_user);
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+ exit(1);
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+ }
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+ if (appl_pam_requires_chauthtok()) {
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+ fprintf(stderr, "Password change required for %s.\n",
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+ target_user);
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+ exit(1);
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+ }
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+ force_fork++;
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+ }
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+#endif
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+
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/* Run authorization as target.*/
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if (krb5_seteuid(target_uid)) {
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com_err(prog_name, errno, _("while switching to target for "
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@@ -596,6 +619,24 @@ main (argc, argv)
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exit(1);
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}
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+#ifdef USE_PAM
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+ } else {
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+ /* we always do PAM account management, even for root */
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+ if (appl_pam_enabled(ksu_context, "ksu")) {
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+ if (appl_pam_acct_mgmt(KSU_PAM_SERVICE, 1, target_user, NULL,
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+ NULL, source_user,
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+ ttyname(STDERR_FILENO)) != 0) {
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+ fprintf(stderr, "Access denied for %s.\n", target_user);
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+ exit(1);
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+ }
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+ if (appl_pam_requires_chauthtok()) {
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+ fprintf(stderr, "Password change required for %s.\n",
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+ target_user);
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+ exit(1);
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+ }
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+ force_fork++;
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+ }
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+#endif
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}
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if( some_rest_copy){
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@@ -653,6 +694,30 @@ main (argc, argv)
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exit(1);
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}
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+#ifdef USE_PAM
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+ if (appl_pam_enabled(ksu_context, "ksu")) {
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+ if (appl_pam_session_open() != 0) {
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+ fprintf(stderr, "Error opening session for %s.\n", target_user);
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+ exit(1);
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+ }
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+#ifdef DEBUG
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+ if (auth_debug){
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+ printf(" Opened PAM session.\n");
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+ }
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+#endif
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+ if (appl_pam_cred_init()) {
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+ fprintf(stderr, "Error initializing credentials for %s.\n",
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+ target_user);
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+ exit(1);
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+ }
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+#ifdef DEBUG
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+ if (auth_debug){
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+ printf(" Initialized PAM credentials.\n");
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+ }
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+#endif
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+ }
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+#endif
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+
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/* set permissions */
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if (setgid(target_pwd->pw_gid) < 0) {
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perror("ksu: setgid");
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@@ -750,7 +815,7 @@ main (argc, argv)
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fprintf(stderr, "program to be execed %s\n",params[0]);
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}
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- if( keep_target_cache ) {
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+ if( keep_target_cache && !force_fork ) {
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execv(params[0], params);
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com_err(prog_name, errno, _("while trying to execv %s"), params[0]);
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sweep_up(ksu_context, cc_target);
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@@ -780,16 +845,35 @@ main (argc, argv)
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if (ret_pid == -1) {
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com_err(prog_name, errno, _("while calling waitpid"));
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}
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- sweep_up(ksu_context, cc_target);
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+ if( !keep_target_cache ) {
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+ sweep_up(ksu_context, cc_target);
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+ }
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exit (statusp);
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case -1:
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com_err(prog_name, errno, _("while trying to fork."));
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sweep_up(ksu_context, cc_target);
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exit (1);
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case 0:
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+#ifdef USE_PAM
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+ if (appl_pam_enabled(ksu_context, "ksu")) {
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+ if (appl_pam_setenv() != 0) {
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+ fprintf(stderr, "Error setting up environment for %s.\n",
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+ target_user);
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+ exit (1);
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+ }
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+#ifdef DEBUG
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+ if (auth_debug){
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+ printf(" Set up PAM environment.\n");
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+ }
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+#endif
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+ }
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+#endif
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execv(params[0], params);
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com_err(prog_name, errno, _("while trying to execv %s"),
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params[0]);
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+ if( keep_target_cache ) {
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+ sweep_up(ksu_context, cc_target);
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+ }
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exit (1);
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}
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}
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diff --git a/src/clients/ksu/pam.c b/src/clients/ksu/pam.c
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new file mode 100644
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index 0000000000..cbfe487047
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--- /dev/null
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+++ b/src/clients/ksu/pam.c
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@@ -0,0 +1,389 @@
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+/*
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+ * src/clients/ksu/pam.c
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+ *
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+ * Copyright 2007,2009,2010 Red Hat, Inc.
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+ *
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+ * All Rights Reserved.
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+ *
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+ * Redistribution and use in source and binary forms, with or without
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+ * modification, are permitted provided that the following conditions are met:
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+ *
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+ * Redistributions of source code must retain the above copyright notice, this
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+ * list of conditions and the following disclaimer.
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+ *
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+ * Redistributions in binary form must reproduce the above copyright notice,
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+ * this list of conditions and the following disclaimer in the documentation
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+ * and/or other materials provided with the distribution.
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+ *
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+ * Neither the name of Red Hat, Inc. nor the names of its contributors may be
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+ * used to endorse or promote products derived from this software without
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+ * specific prior written permission.
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+ *
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+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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||
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+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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|
|
+ * 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.
|
||
|
|
+ *
|
||
|
|
+ * Convenience wrappers for using PAM.
|
||
|
|
+ */
|
||
|
|
+
|
||
|
|
+#include "autoconf.h"
|
||
|
|
+#ifdef USE_PAM
|
||
|
|
+#include <sys/types.h>
|
||
|
|
+#include <stdio.h>
|
||
|
|
+#include <stdlib.h>
|
||
|
|
+#include <string.h>
|
||
|
|
+#include <unistd.h>
|
||
|
|
+#include "k5-int.h"
|
||
|
|
+#include "pam.h"
|
||
|
|
+
|
||
|
|
+#ifndef MAXPWSIZE
|
||
|
|
+#define MAXPWSIZE 128
|
||
|
|
+#endif
|
||
|
|
+
|
||
|
|
+static int appl_pam_started;
|
||
|
|
+static pid_t appl_pam_starter = -1;
|
||
|
|
+static int appl_pam_session_opened;
|
||
|
|
+static int appl_pam_creds_initialized;
|
||
|
|
+static int appl_pam_pwchange_required;
|
||
|
|
+static pam_handle_t *appl_pamh;
|
||
|
|
+static struct pam_conv appl_pam_conv;
|
||
|
|
+static char *appl_pam_user;
|
||
|
|
+struct appl_pam_non_interactive_args {
|
||
|
|
+ const char *user;
|
||
|
|
+ const char *password;
|
||
|
|
+};
|
||
|
|
+
|
||
|
|
+int
|
||
|
|
+appl_pam_enabled(krb5_context context, const char *section)
|
||
|
|
+{
|
||
|
|
+ int enabled = 1;
|
||
|
|
+ if ((context != NULL) && (context->profile != NULL)) {
|
||
|
|
+ if (profile_get_boolean(context->profile,
|
||
|
|
+ section,
|
||
|
|
+ USE_PAM_CONFIGURATION_KEYWORD,
|
||
|
|
+ NULL,
|
||
|
|
+ enabled, &enabled) != 0) {
|
||
|
|
+ enabled = 1;
|
||
|
|
+ }
|
||
|
|
+ }
|
||
|
|
+ return enabled;
|
||
|
|
+}
|
||
|
|
+
|
||
|
|
+void
|
||
|
|
+appl_pam_cleanup(void)
|
||
|
|
+{
|
||
|
|
+ if (getpid() != appl_pam_starter) {
|
||
|
|
+ return;
|
||
|
|
+ }
|
||
|
|
+#ifdef DEBUG
|
||
|
|
+ printf("Called to clean up PAM.\n");
|
||
|
|
+#endif
|
||
|
|
+ if (appl_pam_creds_initialized) {
|
||
|
|
+#ifdef DEBUG
|
||
|
|
+ printf("Deleting PAM credentials.\n");
|
||
|
|
+#endif
|
||
|
|
+ pam_setcred(appl_pamh, PAM_DELETE_CRED);
|
||
|
|
+ appl_pam_creds_initialized = 0;
|
||
|
|
+ }
|
||
|
|
+ if (appl_pam_session_opened) {
|
||
|
|
+#ifdef DEBUG
|
||
|
|
+ printf("Closing PAM session.\n");
|
||
|
|
+#endif
|
||
|
|
+ pam_close_session(appl_pamh, 0);
|
||
|
|
+ appl_pam_session_opened = 0;
|
||
|
|
+ }
|
||
|
|
+ appl_pam_pwchange_required = 0;
|
||
|
|
+ if (appl_pam_started) {
|
||
|
|
+#ifdef DEBUG
|
||
|
|
+ printf("Shutting down PAM.\n");
|
||
|
|
+#endif
|
||
|
|
+ pam_end(appl_pamh, 0);
|
||
|
|
+ appl_pam_started = 0;
|
||
|
|
+ appl_pam_starter = -1;
|
||
|
|
+ free(appl_pam_user);
|
||
|
|
+ appl_pam_user = NULL;
|
||
|
|
+ }
|
||
|
|
+}
|
||
|
|
+static int
|
||
|
|
+appl_pam_interactive_converse(int num_msg, const struct pam_message **msg,
|
||
|
|
+ struct pam_response **presp, void *appdata_ptr)
|
||
|
|
+{
|
||
|
|
+ const struct pam_message *message;
|
||
|
|
+ struct pam_response *resp;
|
||
|
|
+ int i, code;
|
||
|
|
+ char *pwstring, pwbuf[MAXPWSIZE];
|
||
|
|
+ unsigned int pwsize;
|
||
|
|
+ resp = malloc(sizeof(struct pam_response) * num_msg);
|
||
|
|
+ if (resp == NULL) {
|
||
|
|
+ return PAM_BUF_ERR;
|
||
|
|
+ }
|
||
|
|
+ memset(resp, 0, sizeof(struct pam_response) * num_msg);
|
||
|
|
+ code = PAM_SUCCESS;
|
||
|
|
+ for (i = 0; i < num_msg; i++) {
|
||
|
|
+ message = &(msg[0][i]); /* XXX */
|
||
|
|
+ message = msg[i]; /* XXX */
|
||
|
|
+ pwstring = NULL;
|
||
|
|
+ switch (message->msg_style) {
|
||
|
|
+ case PAM_TEXT_INFO:
|
||
|
|
+ case PAM_ERROR_MSG:
|
||
|
|
+ printf("[%s]\n", message->msg ? message->msg : "");
|
||
|
|
+ fflush(stdout);
|
||
|
|
+ resp[i].resp = NULL;
|
||
|
|
+ resp[i].resp_retcode = PAM_SUCCESS;
|
||
|
|
+ break;
|
||
|
|
+ case PAM_PROMPT_ECHO_ON:
|
||
|
|
+ case PAM_PROMPT_ECHO_OFF:
|
||
|
|
+ if (message->msg_style == PAM_PROMPT_ECHO_ON) {
|
||
|
|
+ if (fgets(pwbuf, sizeof(pwbuf),
|
||
|
|
+ stdin) != NULL) {
|
||
|
|
+ pwbuf[strcspn(pwbuf, "\r\n")] = '\0';
|
||
|
|
+ pwstring = pwbuf;
|
||
|
|
+ }
|
||
|
|
+ } else {
|
||
|
|
+ pwstring = getpass(message->msg ?
|
||
|
|
+ message->msg :
|
||
|
|
+ "");
|
||
|
|
+ }
|
||
|
|
+ if ((pwstring != NULL) && (pwstring[0] != '\0')) {
|
||
|
|
+ pwsize = strlen(pwstring);
|
||
|
|
+ resp[i].resp = malloc(pwsize + 1);
|
||
|
|
+ if (resp[i].resp == NULL) {
|
||
|
|
+ resp[i].resp_retcode = PAM_BUF_ERR;
|
||
|
|
+ } else {
|
||
|
|
+ memcpy(resp[i].resp, pwstring, pwsize);
|
||
|
|
+ resp[i].resp[pwsize] = '\0';
|
||
|
|
+ resp[i].resp_retcode = PAM_SUCCESS;
|
||
|
|
+ }
|
||
|
|
+ } else {
|
||
|
|
+ resp[i].resp_retcode = PAM_CONV_ERR;
|
||
|
|
+ code = PAM_CONV_ERR;
|
||
|
|
+ }
|
||
|
|
+ break;
|
||
|
|
+ default:
|
||
|
|
+ break;
|
||
|
|
+ }
|
||
|
|
+ }
|
||
|
|
+ *presp = resp;
|
||
|
|
+ return code;
|
||
|
|
+}
|
||
|
|
+static int
|
||
|
|
+appl_pam_non_interactive_converse(int num_msg,
|
||
|
|
+ const struct pam_message **msg,
|
||
|
|
+ struct pam_response **presp,
|
||
|
|
+ void *appdata_ptr)
|
||
|
|
+{
|
||
|
|
+ const struct pam_message *message;
|
||
|
|
+ struct pam_response *resp;
|
||
|
|
+ int i, code;
|
||
|
|
+ unsigned int pwsize;
|
||
|
|
+ struct appl_pam_non_interactive_args *args;
|
||
|
|
+ const char *pwstring;
|
||
|
|
+ resp = malloc(sizeof(struct pam_response) * num_msg);
|
||
|
|
+ if (resp == NULL) {
|
||
|
|
+ return PAM_BUF_ERR;
|
||
|
|
+ }
|
||
|
|
+ args = appdata_ptr;
|
||
|
|
+ memset(resp, 0, sizeof(struct pam_response) * num_msg);
|
||
|
|
+ code = PAM_SUCCESS;
|
||
|
|
+ for (i = 0; i < num_msg; i++) {
|
||
|
|
+ message = &((*msg)[i]);
|
||
|
|
+ message = msg[i];
|
||
|
|
+ pwstring = NULL;
|
||
|
|
+ switch (message->msg_style) {
|
||
|
|
+ case PAM_TEXT_INFO:
|
||
|
|
+ case PAM_ERROR_MSG:
|
||
|
|
+ break;
|
||
|
|
+ case PAM_PROMPT_ECHO_ON:
|
||
|
|
+ case PAM_PROMPT_ECHO_OFF:
|
||
|
|
+ if (message->msg_style == PAM_PROMPT_ECHO_ON) {
|
||
|
|
+ /* assume "user" */
|
||
|
|
+ pwstring = args->user;
|
||
|
|
+ } else {
|
||
|
|
+ /* assume "password" */
|
||
|
|
+ pwstring = args->password;
|
||
|
|
+ }
|
||
|
|
+ if ((pwstring != NULL) && (pwstring[0] != '\0')) {
|
||
|
|
+ pwsize = strlen(pwstring);
|
||
|
|
+ resp[i].resp = malloc(pwsize + 1);
|
||
|
|
+ if (resp[i].resp == NULL) {
|
||
|
|
+ resp[i].resp_retcode = PAM_BUF_ERR;
|
||
|
|
+ } else {
|
||
|
|
+ memcpy(resp[i].resp, pwstring, pwsize);
|
||
|
|
+ resp[i].resp[pwsize] = '\0';
|
||
|
|
+ resp[i].resp_retcode = PAM_SUCCESS;
|
||
|
|
+ }
|
||
|
|
+ } else {
|
||
|
|
+ resp[i].resp_retcode = PAM_CONV_ERR;
|
||
|
|
+ code = PAM_CONV_ERR;
|
||
|
|
+ }
|
||
|
|
+ break;
|
||
|
|
+ default:
|
||
|
|
+ break;
|
||
|
|
+ }
|
||
|
|
+ }
|
||
|
|
+ *presp = resp;
|
||
|
|
+ return code;
|
||
|
|
+}
|
||
|
|
+static int
|
||
|
|
+appl_pam_start(const char *service, int interactive,
|
||
|
|
+ const char *login_username,
|
||
|
|
+ const char *non_interactive_password,
|
||
|
|
+ const char *hostname,
|
||
|
|
+ const char *ruser,
|
||
|
|
+ const char *tty)
|
||
|
|
+{
|
||
|
|
+ static int exit_handler_registered;
|
||
|
|
+ static struct appl_pam_non_interactive_args args;
|
||
|
|
+ int ret = 0;
|
||
|
|
+ if (appl_pam_started &&
|
||
|
|
+ (strcmp(login_username, appl_pam_user) != 0)) {
|
||
|
|
+ appl_pam_cleanup();
|
||
|
|
+ appl_pam_user = NULL;
|
||
|
|
+ }
|
||
|
|
+ if (!appl_pam_started) {
|
||
|
|
+#ifdef DEBUG
|
||
|
|
+ printf("Starting PAM up (service=\"%s\",user=\"%s\").\n",
|
||
|
|
+ service, login_username);
|
||
|
|
+#endif
|
||
|
|
+ memset(&appl_pam_conv, 0, sizeof(appl_pam_conv));
|
||
|
|
+ appl_pam_conv.conv = interactive ?
|
||
|
|
+ &appl_pam_interactive_converse :
|
||
|
|
+ &appl_pam_non_interactive_converse;
|
||
|
|
+ memset(&args, 0, sizeof(args));
|
||
|
|
+ args.user = strdup(login_username);
|
||
|
|
+ args.password = non_interactive_password ?
|
||
|
|
+ strdup(non_interactive_password) :
|
||
|
|
+ NULL;
|
||
|
|
+ appl_pam_conv.appdata_ptr = &args;
|
||
|
|
+ ret = pam_start(service, login_username,
|
||
|
|
+ &appl_pam_conv, &appl_pamh);
|
||
|
|
+ if (ret == 0) {
|
||
|
|
+ if (hostname != NULL) {
|
||
|
|
+#ifdef DEBUG
|
||
|
|
+ printf("Setting PAM_RHOST to \"%s\".\n", hostname);
|
||
|
|
+#endif
|
||
|
|
+ pam_set_item(appl_pamh, PAM_RHOST, hostname);
|
||
|
|
+ }
|
||
|
|
+ if (ruser != NULL) {
|
||
|
|
+#ifdef DEBUG
|
||
|
|
+ printf("Setting PAM_RUSER to \"%s\".\n", ruser);
|
||
|
|
+#endif
|
||
|
|
+ pam_set_item(appl_pamh, PAM_RUSER, ruser);
|
||
|
|
+ }
|
||
|
|
+ if (tty != NULL) {
|
||
|
|
+#ifdef DEBUG
|
||
|
|
+ printf("Setting PAM_TTY to \"%s\".\n", tty);
|
||
|
|
+#endif
|
||
|
|
+ pam_set_item(appl_pamh, PAM_TTY, tty);
|
||
|
|
+ }
|
||
|
|
+ if (!exit_handler_registered &&
|
||
|
|
+ (atexit(appl_pam_cleanup) != 0)) {
|
||
|
|
+ pam_end(appl_pamh, 0);
|
||
|
|
+ appl_pamh = NULL;
|
||
|
|
+ ret = -1;
|
||
|
|
+ } else {
|
||
|
|
+ appl_pam_started = 1;
|
||
|
|
+ appl_pam_starter = getpid();
|
||
|
|
+ appl_pam_user = strdup(login_username);
|
||
|
|
+ exit_handler_registered = 1;
|
||
|
|
+ }
|
||
|
|
+ }
|
||
|
|
+ }
|
||
|
|
+ return ret;
|
||
|
|
+}
|
||
|
|
+int
|
||
|
|
+appl_pam_acct_mgmt(const char *service, int interactive,
|
||
|
|
+ const char *login_username,
|
||
|
|
+ const char *non_interactive_password,
|
||
|
|
+ const char *hostname,
|
||
|
|
+ const char *ruser,
|
||
|
|
+ const char *tty)
|
||
|
|
+{
|
||
|
|
+ int ret;
|
||
|
|
+ appl_pam_pwchange_required = 0;
|
||
|
|
+ ret = appl_pam_start(service, interactive, login_username,
|
||
|
|
+ non_interactive_password, hostname, ruser, tty);
|
||
|
|
+ if (ret == 0) {
|
||
|
|
+#ifdef DEBUG
|
||
|
|
+ printf("Calling pam_acct_mgmt().\n");
|
||
|
|
+#endif
|
||
|
|
+ ret = pam_acct_mgmt(appl_pamh, 0);
|
||
|
|
+ switch (ret) {
|
||
|
|
+ case PAM_IGNORE:
|
||
|
|
+ ret = 0;
|
||
|
|
+ break;
|
||
|
|
+ case PAM_NEW_AUTHTOK_REQD:
|
||
|
|
+ appl_pam_pwchange_required = 1;
|
||
|
|
+ ret = 0;
|
||
|
|
+ break;
|
||
|
|
+ default:
|
||
|
|
+ break;
|
||
|
|
+ }
|
||
|
|
+ }
|
||
|
|
+ return ret;
|
||
|
|
+}
|
||
|
|
+int
|
||
|
|
+appl_pam_requires_chauthtok(void)
|
||
|
|
+{
|
||
|
|
+ return appl_pam_pwchange_required;
|
||
|
|
+}
|
||
|
|
+int
|
||
|
|
+appl_pam_session_open(void)
|
||
|
|
+{
|
||
|
|
+ int ret = 0;
|
||
|
|
+ if (appl_pam_started) {
|
||
|
|
+#ifdef DEBUG
|
||
|
|
+ printf("Opening PAM session.\n");
|
||
|
|
+#endif
|
||
|
|
+ ret = pam_open_session(appl_pamh, 0);
|
||
|
|
+ if (ret == 0) {
|
||
|
|
+ appl_pam_session_opened = 1;
|
||
|
|
+ }
|
||
|
|
+ }
|
||
|
|
+ return ret;
|
||
|
|
+}
|
||
|
|
+int
|
||
|
|
+appl_pam_setenv(void)
|
||
|
|
+{
|
||
|
|
+ int ret = 0;
|
||
|
|
+#ifdef HAVE_PAM_GETENVLIST
|
||
|
|
+#ifdef HAVE_PUTENV
|
||
|
|
+ int i;
|
||
|
|
+ char **list;
|
||
|
|
+ if (appl_pam_started) {
|
||
|
|
+ list = pam_getenvlist(appl_pamh);
|
||
|
|
+ for (i = 0; ((list != NULL) && (list[i] != NULL)); i++) {
|
||
|
|
+#ifdef DEBUG
|
||
|
|
+ printf("Setting \"%s\" in environment.\n", list[i]);
|
||
|
|
+#endif
|
||
|
|
+ putenv(list[i]);
|
||
|
|
+ }
|
||
|
|
+ }
|
||
|
|
+#endif
|
||
|
|
+#endif
|
||
|
|
+ return ret;
|
||
|
|
+}
|
||
|
|
+int
|
||
|
|
+appl_pam_cred_init(void)
|
||
|
|
+{
|
||
|
|
+ int ret = 0;
|
||
|
|
+ if (appl_pam_started) {
|
||
|
|
+#ifdef DEBUG
|
||
|
|
+ printf("Initializing PAM credentials.\n");
|
||
|
|
+#endif
|
||
|
|
+ ret = pam_setcred(appl_pamh, PAM_ESTABLISH_CRED);
|
||
|
|
+ if (ret == 0) {
|
||
|
|
+ appl_pam_creds_initialized = 1;
|
||
|
|
+ }
|
||
|
|
+ }
|
||
|
|
+ return ret;
|
||
|
|
+}
|
||
|
|
+#endif
|
||
|
|
diff --git a/src/clients/ksu/pam.h b/src/clients/ksu/pam.h
|
||
|
|
new file mode 100644
|
||
|
|
index 0000000000..0ab76569cb
|
||
|
|
--- /dev/null
|
||
|
|
+++ b/src/clients/ksu/pam.h
|
||
|
|
@@ -0,0 +1,57 @@
|
||
|
|
+/*
|
||
|
|
+ * src/clients/ksu/pam.h
|
||
|
|
+ *
|
||
|
|
+ * Copyright 2007,2009,2010 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.
|
||
|
|
+ *
|
||
|
|
+ * Convenience wrappers for using PAM.
|
||
|
|
+ */
|
||
|
|
+
|
||
|
|
+#include <krb5.h>
|
||
|
|
+#ifdef HAVE_SECURITY_PAM_APPL_H
|
||
|
|
+#include <security/pam_appl.h>
|
||
|
|
+#endif
|
||
|
|
+
|
||
|
|
+#define USE_PAM_CONFIGURATION_KEYWORD "use_pam"
|
||
|
|
+
|
||
|
|
+#ifdef USE_PAM
|
||
|
|
+int appl_pam_enabled(krb5_context context, const char *section);
|
||
|
|
+int appl_pam_acct_mgmt(const char *service, int interactive,
|
||
|
|
+ const char *local_username,
|
||
|
|
+ const char *non_interactive_password,
|
||
|
|
+ const char *hostname,
|
||
|
|
+ const char *ruser,
|
||
|
|
+ const char *tty);
|
||
|
|
+int appl_pam_requires_chauthtok(void);
|
||
|
|
+int appl_pam_session_open(void);
|
||
|
|
+int appl_pam_setenv(void);
|
||
|
|
+int appl_pam_cred_init(void);
|
||
|
|
+void appl_pam_cleanup(void);
|
||
|
|
+#endif
|
||
|
|
diff --git a/src/configure.ac b/src/configure.ac
|
||
|
|
index 77be7a2025..587221936e 100644
|
||
|
|
--- a/src/configure.ac
|
||
|
|
+++ b/src/configure.ac
|
||
|
|
@@ -1399,6 +1399,8 @@ AC_SUBST([VERTO_VERSION])
|
||
|
|
|
||
|
|
AC_PATH_PROG(GROFF, groff)
|
||
|
|
|
||
|
|
+KRB5_WITH_PAM
|
||
|
|
+
|
||
|
|
# Make localedir work in autoconf 2.5x.
|
||
|
|
if test "${localedir+set}" != set; then
|
||
|
|
localedir='$(datadir)/locale'
|
||
|
|
--
|
||
|
|
2.41.0
|
||
|
|
|