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openssh/openssh-5.2p1-selinux.patch
Jan F. Chadima ce94daebbc Upstream convergence
2009-08-31 12:40:05 +00:00

395 lines
12 KiB
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diff -up openssh-5.2p1/auth1.c.selinux openssh-5.2p1/auth1.c
--- openssh-5.2p1/auth1.c.selinux 2008-07-09 12:54:05.000000000 +0200
+++ openssh-5.2p1/auth1.c 2009-08-11 22:43:07.918183730 +0200
@@ -392,6 +392,9 @@ do_authentication(Authctxt *authctxt)
{
u_int ulen;
char *user, *style = NULL;
+#ifdef WITH_SELINUX
+ char *role=NULL;
+#endif
/* Get the name of the user that we wish to log in as. */
packet_read_expect(SSH_CMSG_USER);
@@ -400,11 +403,25 @@ do_authentication(Authctxt *authctxt)
user = packet_get_string(&ulen);
packet_check_eom();
+#ifdef WITH_SELINUX
+ if ((role = strchr(user, '/')) != NULL)
+ *role++ = '\0';
+#endif
+
if ((style = strchr(user, ':')) != NULL)
*style++ = '\0';
+#ifdef WITH_SELINUX
+ else
+ if (role && (style = strchr(role, ':')) != NULL)
+ *style++ = '\0';
+#endif
+
authctxt->user = user;
authctxt->style = style;
+#ifdef WITH_SELINUX
+ authctxt->role = role;
+#endif
/* Verify that the user is a valid user. */
if ((authctxt->pw = PRIVSEP(getpwnamallow(user))) != NULL)
diff -up openssh-5.2p1/auth2.c.selinux openssh-5.2p1/auth2.c
--- openssh-5.2p1/auth2.c.selinux 2008-11-05 06:20:46.000000000 +0100
+++ openssh-5.2p1/auth2.c 2009-08-11 22:43:07.919756192 +0200
@@ -216,6 +216,9 @@ input_userauth_request(int type, u_int32
Authctxt *authctxt = ctxt;
Authmethod *m = NULL;
char *user, *service, *method, *style = NULL;
+#ifdef WITH_SELINUX
+ char *role = NULL;
+#endif
int authenticated = 0;
if (authctxt == NULL)
@@ -227,6 +230,11 @@ input_userauth_request(int type, u_int32
debug("userauth-request for user %s service %s method %s", user, service, method);
debug("attempt %d failures %d", authctxt->attempt, authctxt->failures);
+#ifdef WITH_SELINUX
+ if ((role = strchr(user, '/')) != NULL)
+ *role++ = 0;
+#endif
+
if ((style = strchr(user, ':')) != NULL)
*style++ = 0;
@@ -252,8 +260,15 @@ input_userauth_request(int type, u_int32
use_privsep ? " [net]" : "");
authctxt->service = xstrdup(service);
authctxt->style = style ? xstrdup(style) : NULL;
- if (use_privsep)
+#ifdef WITH_SELINUX
+ authctxt->role = role ? xstrdup(role) : NULL;
+#endif
+ if (use_privsep) {
mm_inform_authserv(service, style);
+#ifdef WITH_SELINUX
+ mm_inform_authrole(role);
+#endif
+ }
userauth_banner();
} else if (strcmp(user, authctxt->user) != 0 ||
strcmp(service, authctxt->service) != 0) {
diff -up openssh-5.2p1/auth2-gss.c.selinux openssh-5.2p1/auth2-gss.c
--- openssh-5.2p1/auth2-gss.c.selinux 2007-12-02 12:59:45.000000000 +0100
+++ openssh-5.2p1/auth2-gss.c 2009-08-11 22:43:07.921723295 +0200
@@ -258,6 +258,7 @@ input_gssapi_mic(int type, u_int32_t ple
Authctxt *authctxt = ctxt;
Gssctxt *gssctxt;
int authenticated = 0;
+ char *micuser;
Buffer b;
gss_buffer_desc mic, gssbuf;
u_int len;
@@ -270,7 +271,13 @@ input_gssapi_mic(int type, u_int32_t ple
mic.value = packet_get_string(&len);
mic.length = len;
- ssh_gssapi_buildmic(&b, authctxt->user, authctxt->service,
+#ifdef WITH_SELINUX
+ if (authctxt->role && (strlen(authctxt->role) > 0))
+ xasprintf(&micuser, "%s/%s", authctxt->user, authctxt->role);
+ else
+#endif
+ micuser = authctxt->user;
+ ssh_gssapi_buildmic(&b, micuser, authctxt->service,
"gssapi-with-mic");
gssbuf.value = buffer_ptr(&b);
@@ -282,6 +289,8 @@ input_gssapi_mic(int type, u_int32_t ple
logit("GSSAPI MIC check failed");
buffer_free(&b);
+ if (micuser != authctxt->user)
+ xfree(micuser);
xfree(mic.value);
authctxt->postponed = 0;
diff -up openssh-5.2p1/auth2-hostbased.c.selinux openssh-5.2p1/auth2-hostbased.c
--- openssh-5.2p1/auth2-hostbased.c.selinux 2008-07-17 10:57:19.000000000 +0200
+++ openssh-5.2p1/auth2-hostbased.c 2009-08-11 22:43:07.923721059 +0200
@@ -106,7 +106,15 @@ userauth_hostbased(Authctxt *authctxt)
buffer_put_string(&b, session_id2, session_id2_len);
/* reconstruct packet */
buffer_put_char(&b, SSH2_MSG_USERAUTH_REQUEST);
- buffer_put_cstring(&b, authctxt->user);
+#ifdef WITH_SELINUX
+ if (authctxt->role) {
+ buffer_put_int(&b, strlen(authctxt->user)+strlen(authctxt->role)+1);
+ buffer_append(&b, authctxt->user, strlen(authctxt->user));
+ buffer_put_char(&b, '/');
+ buffer_append(&b, authctxt->role, strlen(authctxt->role));
+ } else
+#endif
+ buffer_put_cstring(&b, authctxt->user);
buffer_put_cstring(&b, service);
buffer_put_cstring(&b, "hostbased");
buffer_put_string(&b, pkalg, alen);
diff -up openssh-5.2p1/auth2-pubkey.c.selinux openssh-5.2p1/auth2-pubkey.c
--- openssh-5.2p1/auth2-pubkey.c.selinux 2008-07-04 04:54:25.000000000 +0200
+++ openssh-5.2p1/auth2-pubkey.c 2009-08-11 22:43:07.925704588 +0200
@@ -117,7 +117,15 @@ userauth_pubkey(Authctxt *authctxt)
}
/* reconstruct packet */
buffer_put_char(&b, SSH2_MSG_USERAUTH_REQUEST);
- buffer_put_cstring(&b, authctxt->user);
+#ifdef WITH_SELINUX
+ if (authctxt->role) {
+ buffer_put_int(&b, strlen(authctxt->user)+strlen(authctxt->role)+1);
+ buffer_append(&b, authctxt->user, strlen(authctxt->user));
+ buffer_put_char(&b, '/');
+ buffer_append(&b, authctxt->role, strlen(authctxt->role));
+ } else
+#endif
+ buffer_put_cstring(&b, authctxt->user);
buffer_put_cstring(&b,
datafellows & SSH_BUG_PKSERVICE ?
"ssh-userauth" :
diff -up openssh-5.2p1/auth.h.selinux openssh-5.2p1/auth.h
--- openssh-5.2p1/auth.h.selinux 2008-11-05 06:20:46.000000000 +0100
+++ openssh-5.2p1/auth.h 2009-08-11 22:43:07.927199901 +0200
@@ -58,6 +58,9 @@ struct Authctxt {
char *service;
struct passwd *pw; /* set if 'valid' */
char *style;
+#ifdef WITH_SELINUX
+ char *role;
+#endif
void *kbdintctxt;
void *jpake_ctx;
#ifdef BSD_AUTH
diff -up openssh-5.2p1/configure.ac.selinux openssh-5.2p1/configure.ac
--- openssh-5.2p1/configure.ac.selinux 2009-02-16 05:37:03.000000000 +0100
+++ openssh-5.2p1/configure.ac 2009-08-11 22:43:07.930259052 +0200
@@ -3335,6 +3335,7 @@ AC_ARG_WITH(selinux,
AC_CHECK_LIB(selinux, setexeccon, [ LIBSELINUX="-lselinux" ],
AC_MSG_ERROR(SELinux support requires libselinux library))
SSHDLIBS="$SSHDLIBS $LIBSELINUX"
+ LIBS="$LIBS $LIBSELINUX"
AC_CHECK_FUNCS(getseuserbyname get_default_context_with_level)
LIBS="$save_LIBS"
fi ]
diff -up openssh-5.2p1/monitor.c.selinux openssh-5.2p1/monitor.c
--- openssh-5.2p1/monitor.c.selinux 2009-02-14 06:33:31.000000000 +0100
+++ openssh-5.2p1/monitor.c 2009-08-11 22:43:07.933623092 +0200
@@ -135,6 +135,9 @@ int mm_answer_sign(int, Buffer *);
int mm_answer_pwnamallow(int, Buffer *);
int mm_answer_auth2_read_banner(int, Buffer *);
int mm_answer_authserv(int, Buffer *);
+#ifdef WITH_SELINUX
+int mm_answer_authrole(int, Buffer *);
+#endif
int mm_answer_authpassword(int, Buffer *);
int mm_answer_bsdauthquery(int, Buffer *);
int mm_answer_bsdauthrespond(int, Buffer *);
@@ -211,6 +214,9 @@ struct mon_table mon_dispatch_proto20[]
{MONITOR_REQ_SIGN, MON_ONCE, mm_answer_sign},
{MONITOR_REQ_PWNAM, MON_ONCE, mm_answer_pwnamallow},
{MONITOR_REQ_AUTHSERV, MON_ONCE, mm_answer_authserv},
+#ifdef WITH_SELINUX
+ {MONITOR_REQ_AUTHROLE, MON_ONCE, mm_answer_authrole},
+#endif
{MONITOR_REQ_AUTH2_READ_BANNER, MON_ONCE, mm_answer_auth2_read_banner},
{MONITOR_REQ_AUTHPASSWORD, MON_AUTH, mm_answer_authpassword},
#ifdef USE_PAM
@@ -680,6 +686,9 @@ mm_answer_pwnamallow(int sock, Buffer *m
else {
/* Allow service/style information on the auth context */
monitor_permit(mon_dispatch, MONITOR_REQ_AUTHSERV, 1);
+#ifdef WITH_SELINUX
+ monitor_permit(mon_dispatch, MONITOR_REQ_AUTHROLE, 1);
+#endif
monitor_permit(mon_dispatch, MONITOR_REQ_AUTH2_READ_BANNER, 1);
}
@@ -724,6 +733,25 @@ mm_answer_authserv(int sock, Buffer *m)
return (0);
}
+#ifdef WITH_SELINUX
+int
+mm_answer_authrole(int sock, Buffer *m)
+{
+ monitor_permit_authentications(1);
+
+ authctxt->role = buffer_get_string(m, NULL);
+ debug3("%s: role=%s",
+ __func__, authctxt->role);
+
+ if (strlen(authctxt->role) == 0) {
+ xfree(authctxt->role);
+ authctxt->role = NULL;
+ }
+
+ return (0);
+}
+#endif
+
int
mm_answer_authpassword(int sock, Buffer *m)
{
@@ -1102,7 +1130,7 @@ static int
monitor_valid_userblob(u_char *data, u_int datalen)
{
Buffer b;
- char *p;
+ char *p, *r;
u_int len;
int fail = 0;
@@ -1128,6 +1156,8 @@ monitor_valid_userblob(u_char *data, u_i
if (buffer_get_char(&b) != SSH2_MSG_USERAUTH_REQUEST)
fail++;
p = buffer_get_string(&b, NULL);
+ if ((r = strchr(p, '/')) != NULL)
+ *r = '\0';
if (strcmp(authctxt->user, p) != 0) {
logit("wrong user name passed to monitor: expected %s != %.100s",
authctxt->user, p);
@@ -1159,7 +1189,7 @@ monitor_valid_hostbasedblob(u_char *data
char *chost)
{
Buffer b;
- char *p;
+ char *p, *r;
u_int len;
int fail = 0;
@@ -1176,6 +1206,8 @@ monitor_valid_hostbasedblob(u_char *data
if (buffer_get_char(&b) != SSH2_MSG_USERAUTH_REQUEST)
fail++;
p = buffer_get_string(&b, NULL);
+ if ((r = strchr(p, '/')) != NULL)
+ *r = '\0';
if (strcmp(authctxt->user, p) != 0) {
logit("wrong user name passed to monitor: expected %s != %.100s",
authctxt->user, p);
diff -up openssh-5.2p1/monitor.h.selinux openssh-5.2p1/monitor.h
--- openssh-5.2p1/monitor.h.selinux 2008-11-05 06:20:46.000000000 +0100
+++ openssh-5.2p1/monitor.h 2009-08-11 22:43:07.935612930 +0200
@@ -31,6 +31,9 @@
enum monitor_reqtype {
MONITOR_REQ_MODULI, MONITOR_ANS_MODULI,
MONITOR_REQ_FREE, MONITOR_REQ_AUTHSERV,
+#ifdef WITH_SELINUX
+ MONITOR_REQ_AUTHROLE,
+#endif
MONITOR_REQ_SIGN, MONITOR_ANS_SIGN,
MONITOR_REQ_PWNAM, MONITOR_ANS_PWNAM,
MONITOR_REQ_AUTH2_READ_BANNER, MONITOR_ANS_AUTH2_READ_BANNER,
diff -up openssh-5.2p1/monitor_wrap.c.selinux openssh-5.2p1/monitor_wrap.c
--- openssh-5.2p1/monitor_wrap.c.selinux 2008-11-05 06:20:47.000000000 +0100
+++ openssh-5.2p1/monitor_wrap.c 2009-08-11 22:43:07.937212340 +0200
@@ -297,6 +297,25 @@ mm_inform_authserv(char *service, char *
buffer_free(&m);
}
+/* Inform the privileged process about role */
+
+#ifdef WITH_SELINUX
+void
+mm_inform_authrole(char *role)
+{
+ Buffer m;
+
+ debug3("%s entering", __func__);
+
+ buffer_init(&m);
+ buffer_put_cstring(&m, role ? role : "");
+
+ mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHROLE, &m);
+
+ buffer_free(&m);
+}
+#endif
+
/* Do the password authentication */
int
mm_auth_password(Authctxt *authctxt, char *password)
diff -up openssh-5.2p1/monitor_wrap.h.selinux openssh-5.2p1/monitor_wrap.h
--- openssh-5.2p1/monitor_wrap.h.selinux 2008-11-05 06:20:47.000000000 +0100
+++ openssh-5.2p1/monitor_wrap.h 2009-08-11 22:43:07.938268752 +0200
@@ -41,6 +41,9 @@ int mm_is_monitor(void);
DH *mm_choose_dh(int, int, int);
int mm_key_sign(Key *, u_char **, u_int *, u_char *, u_int);
void mm_inform_authserv(char *, char *);
+#ifdef WITH_SELINUX
+void mm_inform_authrole(char *);
+#endif
struct passwd *mm_getpwnamallow(const char *);
char *mm_auth2_read_banner(void);
int mm_auth_password(struct Authctxt *, char *);
diff -up openssh-5.2p1/openbsd-compat/port-linux.c.selinux openssh-5.2p1/openbsd-compat/port-linux.c
--- openssh-5.2p1/openbsd-compat/port-linux.c.selinux 2008-03-26 21:27:21.000000000 +0100
+++ openssh-5.2p1/openbsd-compat/port-linux.c 2009-08-11 22:44:14.529196220 +0200
@@ -30,11 +30,16 @@
#ifdef WITH_SELINUX
#include "log.h"
#include "port-linux.h"
+#include "key.h"
+#include "hostfile.h"
+#include "auth.h"
#include <selinux/selinux.h>
#include <selinux/flask.h>
#include <selinux/get_context_list.h>
+extern Authctxt *the_authctxt;
+
/* Wrapper around is_selinux_enabled() to log its return value once only */
int
ssh_selinux_enabled(void)
@@ -53,23 +58,36 @@ ssh_selinux_enabled(void)
static security_context_t
ssh_selinux_getctxbyname(char *pwname)
{
- security_context_t sc;
- char *sename = NULL, *lvl = NULL;
- int r;
+ security_context_t sc = NULL;
+ char *sename, *lvl;
+ char *role = NULL;
+ int r = 0;
+ if (the_authctxt)
+ role=the_authctxt->role;
#ifdef HAVE_GETSEUSERBYNAME
- if (getseuserbyname(pwname, &sename, &lvl) != 0)
- return NULL;
+ if ((r=getseuserbyname(pwname, &sename, &lvl)) != 0) {
+ sename = NULL;
+ lvl = NULL;
+ }
#else
sename = pwname;
lvl = NULL;
#endif
+ if (r == 0) {
#ifdef HAVE_GET_DEFAULT_CONTEXT_WITH_LEVEL
- r = get_default_context_with_level(sename, lvl, NULL, &sc);
+ if (role != NULL && role[0])
+ r = get_default_context_with_rolelevel(sename, role, lvl, NULL, &sc);
+ else
+ r = get_default_context_with_level(sename, lvl, NULL, &sc);
#else
- r = get_default_context(sename, NULL, &sc);
+ if (role != NULL && role[0])
+ r = get_default_context_with_role(sename, role, NULL, &sc);
+ else
+ r = get_default_context(sename, NULL, &sc);
#endif
+ }
if (r != 0) {
switch (security_getenforce()) {
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