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-rw-r--r--openssh-7.8p1-role-mls.patch867
1 files changed, 0 insertions, 867 deletions
diff --git a/openssh-7.8p1-role-mls.patch b/openssh-7.8p1-role-mls.patch
deleted file mode 100644
index 4dc460a..0000000
--- a/openssh-7.8p1-role-mls.patch
+++ /dev/null
@@ -1,867 +0,0 @@
-diff -up openssh/auth2.c.role-mls openssh/auth2.c
---- openssh/auth2.c.role-mls 2018-08-20 07:57:29.000000000 +0200
-+++ openssh/auth2.c 2018-08-22 11:14:56.815430916 +0200
-@@ -256,6 +256,9 @@ input_userauth_request(int type, u_int32
- Authctxt *authctxt = ssh->authctxt;
- Authmethod *m = NULL;
- char *user = NULL, *service = NULL, *method = NULL, *style = NULL;
-+#ifdef WITH_SELINUX
-+ char *role = NULL;
-+#endif
- int r, authenticated = 0;
- double tstart = monotime_double();
-
-@@ -268,6 +271,11 @@ 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;
-
-@@ -296,8 +304,15 @@ 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(ssh);
- if (auth2_setup_methods_lists(authctxt) != 0)
- ssh_packet_disconnect(ssh,
-diff -up openssh/auth2-gss.c.role-mls openssh/auth2-gss.c
---- openssh/auth2-gss.c.role-mls 2018-08-20 07:57:29.000000000 +0200
-+++ openssh/auth2-gss.c 2018-08-22 11:15:42.459799171 +0200
-@@ -281,6 +281,7 @@ input_gssapi_mic(int type, u_int32_t ple
- Authctxt *authctxt = ssh->authctxt;
- Gssctxt *gssctxt;
- int r, authenticated = 0;
-+ char *micuser;
- struct sshbuf *b;
- gss_buffer_desc mic, gssbuf;
- const char *displayname;
-@@ -298,7 +299,13 @@ input_gssapi_mic(int type, u_int32_t ple
- fatal_f("sshbuf_new failed");
- mic.value = p;
- mic.length = len;
-- ssh_gssapi_buildmic(b, authctxt->user, authctxt->service,
-+#ifdef WITH_SELINUX
-+ if (authctxt->role && authctxt->role[0] != 0)
-+ xasprintf(&micuser, "%s/%s", authctxt->user, authctxt->role);
-+ else
-+#endif
-+ micuser = authctxt->user;
-+ ssh_gssapi_buildmic(b, micuser, authctxt->service,
- "gssapi-with-mic", ssh->kex->session_id);
-
- if ((gssbuf.value = sshbuf_mutable_ptr(b)) == NULL)
-@@ -311,6 +318,8 @@ input_gssapi_mic(int type, u_int32_t ple
- logit("GSSAPI MIC check failed");
-
- sshbuf_free(b);
-+ if (micuser != authctxt->user)
-+ free(micuser);
- free(mic.value);
-
- if ((!use_privsep || mm_is_monitor()) &&
-diff -up openssh/auth2-hostbased.c.role-mls openssh/auth2-hostbased.c
---- openssh/auth2-hostbased.c.role-mls 2018-08-20 07:57:29.000000000 +0200
-+++ openssh/auth2-hostbased.c 2018-08-22 11:14:56.816430924 +0200
-@@ -123,7 +123,16 @@ userauth_hostbased(struct ssh *ssh)
- /* reconstruct packet */
- if ((r = sshbuf_put_stringb(b, ssh->kex->session_id)) != 0 ||
- (r = sshbuf_put_u8(b, SSH2_MSG_USERAUTH_REQUEST)) != 0 ||
-+#ifdef WITH_SELINUX
-+ (authctxt->role
-+ ? ( (r = sshbuf_put_u32(b, strlen(authctxt->user)+strlen(authctxt->role)+1)) != 0 ||
-+ (r = sshbuf_put(b, authctxt->user, strlen(authctxt->user))) != 0 ||
-+ (r = sshbuf_put_u8(b, '/') != 0) ||
-+ (r = sshbuf_put(b, authctxt->role, strlen(authctxt->role))) != 0)
-+ : (r = sshbuf_put_cstring(b, authctxt->user)) != 0) ||
-+#else
- (r = sshbuf_put_cstring(b, authctxt->user)) != 0 ||
-+#endif
- (r = sshbuf_put_cstring(b, authctxt->service)) != 0 ||
- (r = sshbuf_put_cstring(b, method)) != 0 ||
- (r = sshbuf_put_string(b, pkalg, alen)) != 0 ||
-diff -up openssh/auth2-pubkey.c.role-mls openssh/auth2-pubkey.c
---- openssh/auth2-pubkey.c.role-mls 2018-08-22 11:14:56.816430924 +0200
-+++ openssh/auth2-pubkey.c 2018-08-22 11:17:07.331483958 +0200
-@@ -169,9 +169,16 @@ userauth_pubkey(struct ssh *ssh)
- goto done;
- }
- /* reconstruct packet */
-- xasprintf(&userstyle, "%s%s%s", authctxt->user,
-+ xasprintf(&userstyle, "%s%s%s%s%s", authctxt->user,
- authctxt->style ? ":" : "",
-- authctxt->style ? authctxt->style : "");
-+ authctxt->style ? authctxt->style : "",
-+#ifdef WITH_SELINUX
-+ authctxt->role ? "/" : "",
-+ authctxt->role ? authctxt->role : ""
-+#else
-+ "", ""
-+#endif
-+ );
- if ((r = sshbuf_put_u8(b, SSH2_MSG_USERAUTH_REQUEST)) != 0 ||
- (r = sshbuf_put_cstring(b, userstyle)) != 0 ||
- (r = sshbuf_put_cstring(b, authctxt->service)) != 0 ||
-diff -up openssh/auth.h.role-mls openssh/auth.h
---- openssh/auth.h.role-mls 2018-08-20 07:57:29.000000000 +0200
-+++ openssh/auth.h 2018-08-22 11:14:56.816430924 +0200
-@@ -65,6 +65,9 @@ struct Authctxt {
- char *service;
- struct passwd *pw; /* set if 'valid' */
- char *style;
-+#ifdef WITH_SELINUX
-+ char *role;
-+#endif
-
- /* Method lists for multiple authentication */
- char **auth_methods; /* modified from server config */
-diff -up openssh/auth-pam.c.role-mls openssh/auth-pam.c
---- openssh/auth-pam.c.role-mls 2018-08-20 07:57:29.000000000 +0200
-+++ openssh/auth-pam.c 2018-08-22 11:14:56.816430924 +0200
-@@ -1172,7 +1172,7 @@ is_pam_session_open(void)
- * during the ssh authentication process.
- */
- int
--do_pam_putenv(char *name, char *value)
-+do_pam_putenv(char *name, const char *value)
- {
- int ret = 1;
- char *compound;
-diff -up openssh/auth-pam.h.role-mls openssh/auth-pam.h
---- openssh/auth-pam.h.role-mls 2018-08-20 07:57:29.000000000 +0200
-+++ openssh/auth-pam.h 2018-08-22 11:14:56.817430932 +0200
-@@ -33,7 +33,7 @@ u_int do_pam_account(void);
- void do_pam_session(struct ssh *);
- void do_pam_setcred(int );
- void do_pam_chauthtok(void);
--int do_pam_putenv(char *, char *);
-+int do_pam_putenv(char *, const char *);
- char ** fetch_pam_environment(void);
- char ** fetch_pam_child_environment(void);
- void free_pam_environment(char **);
-diff -up openssh/misc.c.role-mls openssh/misc.c
---- openssh/misc.c.role-mls 2018-08-20 07:57:29.000000000 +0200
-+++ openssh/misc.c 2018-08-22 11:14:56.817430932 +0200
-@@ -542,6 +542,7 @@ char *
- colon(char *cp)
- {
- int flag = 0;
-+ int start = 1;
-
- if (*cp == ':') /* Leading colon is part of file name. */
- return NULL;
-@@ -557,6 +558,13 @@ colon(char *cp)
- return (cp);
- if (*cp == '/')
- return NULL;
-+ if (start) {
-+ /* Slash on beginning or after dots only denotes file name. */
-+ if (*cp == '/')
-+ return (0);
-+ if (*cp != '.')
-+ start = 0;
-+ }
- }
- return NULL;
- }
-diff -up openssh-8.6p1/monitor.c.role-mls openssh-8.6p1/monitor.c
---- openssh-8.6p1/monitor.c.role-mls 2021-04-16 05:55:25.000000000 +0200
-+++ openssh-8.6p1/monitor.c 2021-05-21 14:21:56.719414087 +0200
-@@ -117,6 +117,9 @@ int mm_answer_sign(struct ssh *, int, st
- int mm_answer_pwnamallow(struct ssh *, int, struct sshbuf *);
- int mm_answer_auth2_read_banner(struct ssh *, int, struct sshbuf *);
- int mm_answer_authserv(struct ssh *, int, struct sshbuf *);
-+#ifdef WITH_SELINUX
-+int mm_answer_authrole(struct ssh *, int, struct sshbuf *);
-+#endif
- int mm_answer_authpassword(struct ssh *, int, struct sshbuf *);
- int mm_answer_bsdauthquery(struct ssh *, int, struct sshbuf *);
- int mm_answer_bsdauthrespond(struct ssh *, int, struct sshbuf *);
-@@ -195,6 +198,9 @@ 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
-@@ -803,6 +809,9 @@ mm_answer_pwnamallow(struct ssh *ssh, in
-
- /* 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);
-
- #ifdef USE_PAM
-@@ -877,6 +886,26 @@ key_base_type_match(const char *method,
- return found;
- }
-
-+#ifdef WITH_SELINUX
-+int
-+mm_answer_authrole(struct ssh *ssh, int sock, struct sshbuf *m)
-+{
-+ int r;
-+ monitor_permit_authentications(1);
-+
-+ if ((r = sshbuf_get_cstring(m, &authctxt->role, NULL)) != 0)
-+ fatal_f("buffer error: %s", ssh_err(r));
-+ debug3_f("role=%s", authctxt->role);
-+
-+ if (strlen(authctxt->role) == 0) {
-+ free(authctxt->role);
-+ authctxt->role = NULL;
-+ }
-+
-+ return (0);
-+}
-+#endif
-+
- int
- mm_answer_authpassword(struct ssh *ssh, int sock, struct sshbuf *m)
- {
-@@ -1251,7 +1280,7 @@ monitor_valid_userblob(struct ssh *ssh,
- struct sshbuf *b;
- struct sshkey *hostkey = NULL;
- const u_char *p;
-- char *userstyle, *cp;
-+ char *userstyle, *s, *cp;
- size_t len;
- u_char type;
- int hostbound = 0, r, fail = 0;
-@@ -1282,6 +1311,8 @@ monitor_valid_userblob(struct ssh *ssh,
- fail++;
- if ((r = sshbuf_get_cstring(b, &cp, NULL)) != 0)
- fatal_fr(r, "parse userstyle");
-+ if ((s = strchr(cp, '/')) != NULL)
-+ *s = '\0';
- xasprintf(&userstyle, "%s%s%s", authctxt->user,
- authctxt->style ? ":" : "",
- authctxt->style ? authctxt->style : "");
-@@ -1317,7 +1348,7 @@ monitor_valid_hostbasedblob(const u_char
- {
- struct sshbuf *b;
- const u_char *p;
-- char *cp, *userstyle;
-+ char *cp, *s, *userstyle;
- size_t len;
- int r, fail = 0;
- u_char type;
-@@ -1338,6 +1370,8 @@ monitor_valid_hostbasedblob(const u_char
- fail++;
- if ((r = sshbuf_get_cstring(b, &cp, NULL)) != 0)
- fatal_fr(r, "parse userstyle");
-+ if ((s = strchr(cp, '/')) != NULL)
-+ *s = '\0';
- xasprintf(&userstyle, "%s%s%s", authctxt->user,
- authctxt->style ? ":" : "",
- authctxt->style ? authctxt->style : "");
-diff -up openssh/monitor.h.role-mls openssh/monitor.h
---- openssh/monitor.h.role-mls 2018-08-20 07:57:29.000000000 +0200
-+++ openssh/monitor.h 2018-08-22 11:14:56.818430941 +0200
-@@ -55,6 +55,10 @@ enum monitor_reqtype {
- MONITOR_REQ_GSSCHECKMIC = 48, MONITOR_ANS_GSSCHECKMIC = 49,
- MONITOR_REQ_TERM = 50,
-
-+#ifdef WITH_SELINUX
-+ MONITOR_REQ_AUTHROLE = 80,
-+#endif
-+
- MONITOR_REQ_PAM_START = 100,
- MONITOR_REQ_PAM_ACCOUNT = 102, MONITOR_ANS_PAM_ACCOUNT = 103,
- MONITOR_REQ_PAM_INIT_CTX = 104, MONITOR_ANS_PAM_INIT_CTX = 105,
-diff -up openssh/monitor_wrap.c.role-mls openssh/monitor_wrap.c
---- openssh/monitor_wrap.c.role-mls 2018-08-22 11:14:56.818430941 +0200
-+++ openssh/monitor_wrap.c 2018-08-22 11:21:47.938747968 +0200
-@@ -390,6 +390,27 @@ mm_inform_authserv(char *service, char *
- sshbuf_free(m);
- }
-
-+/* Inform the privileged process about role */
-+
-+#ifdef WITH_SELINUX
-+void
-+mm_inform_authrole(char *role)
-+{
-+ int r;
-+ struct sshbuf *m;
-+
-+ debug3_f("entering");
-+
-+ if ((m = sshbuf_new()) == NULL)
-+ fatal_f("sshbuf_new failed");
-+ if ((r = sshbuf_put_cstring(m, role ? role : "")) != 0)
-+ fatal_f("buffer error: %s", ssh_err(r));
-+ mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHROLE, m);
-+
-+ sshbuf_free(m);
-+}
-+#endif
-+
- /* Do the password authentication */
- int
- mm_auth_password(struct ssh *ssh, char *password)
-diff -up openssh/monitor_wrap.h.role-mls openssh/monitor_wrap.h
---- openssh/monitor_wrap.h.role-mls 2018-08-22 11:14:56.818430941 +0200
-+++ openssh/monitor_wrap.h 2018-08-22 11:22:10.439929513 +0200
-@@ -44,6 +44,9 @@ DH *mm_choose_dh(int, int, int);
- const u_char *, size_t, const char *, const char *,
- const char *, u_int compat);
- void mm_inform_authserv(char *, char *);
-+#ifdef WITH_SELINUX
-+void mm_inform_authrole(char *);
-+#endif
- struct passwd *mm_getpwnamallow(struct ssh *, const char *);
- char *mm_auth2_read_banner(void);
- int mm_auth_password(struct ssh *, char *);
-diff -up openssh/openbsd-compat/Makefile.in.role-mls openssh/openbsd-compat/Makefile.in
---- openssh/openbsd-compat/Makefile.in.role-mls 2018-08-20 07:57:29.000000000 +0200
-+++ openssh/openbsd-compat/Makefile.in 2018-08-22 11:14:56.819430949 +0200
-@@ -92,7 +92,8 @@ PORTS= port-aix.o \
- port-prngd.o \
- port-solaris.o \
- port-net.o \
-- port-uw.o
-+ port-uw.o \
-+ port-linux-sshd.o
-
- .c.o:
- $(CC) $(CFLAGS_NOPIE) $(PICFLAG) $(CPPFLAGS) -c $<
-diff -up openssh/openbsd-compat/port-linux.c.role-mls openssh/openbsd-compat/port-linux.c
---- openssh/openbsd-compat/port-linux.c.role-mls 2018-08-20 07:57:29.000000000 +0200
-+++ openssh/openbsd-compat/port-linux.c 2018-08-22 11:14:56.819430949 +0200
-@@ -100,37 +100,6 @@ ssh_selinux_getctxbyname(char *pwname)
- return sc;
- }
-
--/* Set the execution context to the default for the specified user */
--void
--ssh_selinux_setup_exec_context(char *pwname)
--{
-- char *user_ctx = NULL;
--
-- if (!ssh_selinux_enabled())
-- return;
--
-- debug3("%s: setting execution context", __func__);
--
-- user_ctx = ssh_selinux_getctxbyname(pwname);
-- if (setexeccon(user_ctx) != 0) {
-- switch (security_getenforce()) {
-- case -1:
-- fatal("%s: security_getenforce() failed", __func__);
-- case 0:
-- error("%s: Failed to set SELinux execution "
-- "context for %s", __func__, pwname);
-- break;
-- default:
-- fatal("%s: Failed to set SELinux execution context "
-- "for %s (in enforcing mode)", __func__, pwname);
-- }
-- }
-- if (user_ctx != NULL)
-- freecon(user_ctx);
--
-- debug3("%s: done", __func__);
--}
--
- /* Set the TTY context for the specified user */
- void
- ssh_selinux_setup_pty(char *pwname, const char *tty)
-@@ -145,7 +114,11 @@ ssh_selinux_setup_pty(char *pwname, cons
-
- debug3("%s: setting TTY context on %s", __func__, tty);
-
-- user_ctx = ssh_selinux_getctxbyname(pwname);
-+ if (getexeccon(&user_ctx) != 0) {
-+ error_f("getexeccon: %s", strerror(errno));
-+ goto out;
-+ }
-+
-
- /* XXX: should these calls fatal() upon failure in enforcing mode? */
-
-diff -up openssh/openbsd-compat/port-linux.h.role-mls openssh/openbsd-compat/port-linux.h
---- openssh/openbsd-compat/port-linux.h.role-mls 2018-08-20 07:57:29.000000000 +0200
-+++ openssh/openbsd-compat/port-linux.h 2018-08-22 11:14:56.819430949 +0200
-@@ -20,9 +20,10 @@
- #ifdef WITH_SELINUX
- int ssh_selinux_enabled(void);
- void ssh_selinux_setup_pty(char *, const char *);
--void ssh_selinux_setup_exec_context(char *);
- void ssh_selinux_change_context(const char *);
- void ssh_selinux_setfscreatecon(const char *);
-+
-+void sshd_selinux_setup_exec_context(char *);
- #endif
-
- #ifdef LINUX_OOM_ADJUST
-diff -up openssh/openbsd-compat/port-linux-sshd.c.role-mls openssh/openbsd-compat/port-linux-sshd.c
---- openssh/openbsd-compat/port-linux-sshd.c.role-mls 2018-08-22 11:14:56.819430949 +0200
-+++ openssh/openbsd-compat/port-linux-sshd.c 2018-08-22 11:14:56.819430949 +0200
-@@ -0,0 +1,421 @@
-+/*
-+ * Copyright (c) 2005 Daniel Walsh <dwalsh@redhat.com>
-+ * Copyright (c) 2014 Petr Lautrbach <plautrba@redhat.com>
-+ *
-+ * Permission to use, copy, modify, and distribute this software for any
-+ * purpose with or without fee is hereby granted, provided that the above
-+ * copyright notice and this permission notice appear in all copies.
-+ *
-+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
-+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
-+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
-+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
-+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
-+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
-+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
-+ */
-+
-+/*
-+ * Linux-specific portability code - just SELinux support for sshd at present
-+ */
-+
-+#include "includes.h"
-+
-+#if defined(WITH_SELINUX) || defined(LINUX_OOM_ADJUST)
-+#include <errno.h>
-+#include <stdarg.h>
-+#include <string.h>
-+#include <stdio.h>
-+#include <stdlib.h>
-+
-+#include "log.h"
-+#include "xmalloc.h"
-+#include "misc.h" /* servconf.h needs misc.h for struct ForwardOptions */
-+#include "servconf.h"
-+#include "port-linux.h"
-+#include "sshkey.h"
-+#include "hostfile.h"
-+#include "auth.h"
-+
-+#ifdef WITH_SELINUX
-+#include <selinux/selinux.h>
-+#include <selinux/context.h>
-+#include <selinux/get_context_list.h>
-+#include <selinux/get_default_type.h>
-+
-+#ifdef HAVE_LINUX_AUDIT
-+#include <libaudit.h>
-+#include <unistd.h>
-+#endif
-+
-+extern ServerOptions options;
-+extern Authctxt *the_authctxt;
-+extern int inetd_flag;
-+extern int rexeced_flag;
-+
-+/* Send audit message */
-+static int
-+sshd_selinux_send_audit_message(int success, security_context_t default_context,
-+ security_context_t selected_context)
-+{
-+ int rc=0;
-+#ifdef HAVE_LINUX_AUDIT
-+ char *msg = NULL;
-+ int audit_fd = audit_open();
-+ security_context_t default_raw=NULL;
-+ security_context_t selected_raw=NULL;
-+ rc = -1;
-+ if (audit_fd < 0) {
-+ if (errno == EINVAL || errno == EPROTONOSUPPORT ||
-+ errno == EAFNOSUPPORT)
-+ return 0; /* No audit support in kernel */
-+ error("Error connecting to audit system.");
-+ return rc;
-+ }
-+ if (selinux_trans_to_raw_context(default_context, &default_raw) < 0) {
-+ error("Error translating default context.");
-+ default_raw = NULL;
-+ }
-+ if (selinux_trans_to_raw_context(selected_context, &selected_raw) < 0) {
-+ error("Error translating selected context.");
-+ selected_raw = NULL;
-+ }
-+ if (asprintf(&msg, "sshd: default-context=%s selected-context=%s",
-+ default_raw ? default_raw : (default_context ? default_context: "?"),
-+ selected_context ? selected_raw : (selected_context ? selected_context :"?")) < 0) {
-+ error("Error allocating memory.");
-+ goto out;
-+ }
-+ if (audit_log_user_message(audit_fd, AUDIT_USER_ROLE_CHANGE,
-+ msg, NULL, NULL, NULL, success) <= 0) {
-+ error("Error sending audit message.");
-+ goto out;
-+ }
-+ rc = 0;
-+ out:
-+ free(msg);
-+ freecon(default_raw);
-+ freecon(selected_raw);
-+ close(audit_fd);
-+#endif
-+ return rc;
-+}
-+
-+static int
-+mls_range_allowed(security_context_t src, security_context_t dst)
-+{
-+ struct av_decision avd;
-+ int retval;
-+ access_vector_t bit;
-+ security_class_t class;
-+
-+ debug_f("src:%s dst:%s", src, dst);
-+ class = string_to_security_class("context");
-+ if (!class) {
-+ error("string_to_security_class failed to translate security class context");
-+ return 1;
-+ }
-+ bit = string_to_av_perm(class, "contains");
-+ if (!bit) {
-+ error("string_to_av_perm failed to translate av perm contains");
-+ return 1;
-+ }
-+ retval = security_compute_av(src, dst, class, bit, &avd);
-+ if (retval || ((bit & avd.allowed) != bit))
-+ return 0;
-+
-+ return 1;
-+}
-+
-+static int
-+get_user_context(const char *sename, const char *role, const char *lvl,
-+ security_context_t *sc) {
-+#ifdef HAVE_GET_DEFAULT_CONTEXT_WITH_LEVEL
-+ if (lvl == NULL || lvl[0] == '\0' || get_default_context_with_level(sename, lvl, NULL, sc) != 0) {
-+ /* User may have requested a level completely outside of his
-+ allowed range. We get a context just for auditing as the
-+ range check below will certainly fail for default context. */
-+#endif
-+ if (get_default_context(sename, NULL, sc) != 0) {
-+ *sc = NULL;
-+ return -1;
-+ }
-+#ifdef HAVE_GET_DEFAULT_CONTEXT_WITH_LEVEL
-+ }
-+#endif
-+ if (role != NULL && role[0]) {
-+ context_t con;
-+ char *type=NULL;
-+ if (get_default_type(role, &type) != 0) {
-+ error("get_default_type: failed to get default type for '%s'",
-+ role);
-+ goto out;
-+ }
-+ con = context_new(*sc);
-+ if (!con) {
-+ goto out;
-+ }
-+ context_role_set(con, role);
-+ context_type_set(con, type);
-+ freecon(*sc);
-+ *sc = strdup(context_str(con));
-+ context_free(con);
-+ if (!*sc)
-+ return -1;
-+ }
-+#ifdef HAVE_GET_DEFAULT_CONTEXT_WITH_LEVEL
-+ if (lvl != NULL && lvl[0]) {
-+ /* verify that the requested range is obtained */
-+ context_t con;
-+ security_context_t obtained_raw;
-+ security_context_t requested_raw;
-+ con = context_new(*sc);
-+ if (!con) {
-+ goto out;
-+ }
-+ context_range_set(con, lvl);
-+ if (selinux_trans_to_raw_context(*sc, &obtained_raw) < 0) {
-+ context_free(con);
-+ goto out;
-+ }
-+ if (selinux_trans_to_raw_context(context_str(con), &requested_raw) < 0) {
-+ freecon(obtained_raw);
-+ context_free(con);
-+ goto out;
-+ }
-+
-+ debug("get_user_context: obtained context '%s' requested context '%s'",
-+ obtained_raw, requested_raw);
-+ if (strcmp(obtained_raw, requested_raw)) {
-+ /* set the context to the real requested one but fail */
-+ freecon(requested_raw);
-+ freecon(obtained_raw);
-+ freecon(*sc);
-+ *sc = strdup(context_str(con));
-+ context_free(con);
-+ return -1;
-+ }
-+ freecon(requested_raw);
-+ freecon(obtained_raw);
-+ context_free(con);
-+ }
-+#endif
-+ return 0;
-+ out:
-+ freecon(*sc);
-+ *sc = NULL;
-+ return -1;
-+}
-+
-+static void
-+ssh_selinux_get_role_level(char **role, const char **level)
-+{
-+ *role = NULL;
-+ *level = NULL;
-+ if (the_authctxt) {
-+ if (the_authctxt->role != NULL) {
-+ char *slash;
-+ *role = xstrdup(the_authctxt->role);
-+ if ((slash = strchr(*role, '/')) != NULL) {
-+ *slash = '\0';
-+ *level = slash + 1;
-+ }
-+ }
-+ }
-+}
-+
-+/* Return the default security context for the given username */
-+static int
-+sshd_selinux_getctxbyname(char *pwname,
-+ security_context_t *default_sc, security_context_t *user_sc)
-+{
-+ char *sename, *lvl;
-+ char *role;
-+ const char *reqlvl;
-+ int r = 0;
-+ context_t con = NULL;
-+
-+ ssh_selinux_get_role_level(&role, &reqlvl);
-+
-+#ifdef HAVE_GETSEUSERBYNAME
-+ if ((r=getseuserbyname(pwname, &sename, &lvl)) != 0) {
-+ sename = NULL;
-+ lvl = NULL;
-+ }
-+#else
-+ sename = pwname;
-+ lvl = "";
-+#endif
-+
-+ if (r == 0) {
-+#ifdef HAVE_GET_DEFAULT_CONTEXT_WITH_LEVEL
-+ r = get_default_context_with_level(sename, lvl, NULL, default_sc);
-+#else
-+ r = get_default_context(sename, NULL, default_sc);
-+#endif
-+ }
-+
-+ if (r == 0) {
-+ /* If launched from xinetd, we must use current level */
-+ if (inetd_flag && !rexeced_flag) {
-+ security_context_t sshdsc=NULL;
-+
-+ if (getcon_raw(&sshdsc) < 0)
-+ fatal("failed to allocate security context");
-+
-+ if ((con=context_new(sshdsc)) == NULL)
-+ fatal("failed to allocate selinux context");
-+ reqlvl = context_range_get(con);
-+ freecon(sshdsc);
-+ if (reqlvl !=NULL && lvl != NULL && strcmp(reqlvl, lvl) == 0)
-+ /* we actually don't change level */
-+ reqlvl = "";
-+
-+ debug_f("current connection level '%s'", reqlvl);
-+
-+ }
-+
-+ if ((reqlvl != NULL && reqlvl[0]) || (role != NULL && role[0])) {
-+ r = get_user_context(sename, role, reqlvl, user_sc);
-+
-+ if (r == 0 && reqlvl != NULL && reqlvl[0]) {
-+ security_context_t default_level_sc = *default_sc;
-+ if (role != NULL && role[0]) {
-+ if (get_user_context(sename, role, lvl, &default_level_sc) < 0)
-+ default_level_sc = *default_sc;
-+ }
-+ /* verify that the requested range is contained in the user range */
-+ if (mls_range_allowed(default_level_sc, *user_sc)) {
-+ logit("permit MLS level %s (user range %s)", reqlvl, lvl);
-+ } else {
-+ r = -1;
-+ error("deny MLS level %s (user range %s)", reqlvl, lvl);
-+ }
-+ if (default_level_sc != *default_sc)
-+ freecon(default_level_sc);
-+ }
-+ } else {
-+ *user_sc = *default_sc;
-+ }
-+ }
-+ if (r != 0) {
-+ error_f("Failed to get default SELinux security "
-+ "context for %s", pwname);
-+ }
-+
-+#ifdef HAVE_GETSEUSERBYNAME
-+ free(sename);
-+ free(lvl);
-+#endif
-+
-+ if (role != NULL)
-+ free(role);
-+ if (con)
-+ context_free(con);
-+
-+ return (r);
-+}
-+
-+/* Setup environment variables for pam_selinux */
-+static int
-+sshd_selinux_setup_pam_variables(void)
-+{
-+ const char *reqlvl;
-+ char *role;
-+ char *use_current;
-+ int rv;
-+
-+ debug3_f("setting execution context");
-+
-+ ssh_selinux_get_role_level(&role, &reqlvl);
-+
-+ rv = do_pam_putenv("SELINUX_ROLE_REQUESTED", role ? role : "");
-+
-+ if (inetd_flag && !rexeced_flag) {
-+ use_current = "1";
-+ } else {
-+ use_current = "";
-+ rv = rv || do_pam_putenv("SELINUX_LEVEL_REQUESTED", reqlvl ? reqlvl: "");
-+ }
-+
-+ rv = rv || do_pam_putenv("SELINUX_USE_CURRENT_RANGE", use_current);
-+
-+ if (role != NULL)
-+ free(role);
-+
-+ return rv;
-+}
-+
-+/* Set the execution context to the default for the specified user */
-+void
-+sshd_selinux_setup_exec_context(char *pwname)
-+{
-+ security_context_t user_ctx = NULL;
-+ int r = 0;
-+ security_context_t default_ctx = NULL;
-+
-+ if (!ssh_selinux_enabled())
-+ return;
-+
-+ if (options.use_pam) {
-+ /* do not compute context, just setup environment for pam_selinux */
-+ if (sshd_selinux_setup_pam_variables()) {
-+ switch (security_getenforce()) {
-+ case -1:
-+ fatal_f("security_getenforce() failed");
-+ case 0:
-+ error_f("SELinux PAM variable setup failure. Continuing in permissive mode.");
-+ break;
-+ default:
-+ fatal_f("SELinux PAM variable setup failure. Aborting connection.");
-+ }
-+ }
-+ return;
-+ }
-+
-+ debug3_f("setting execution context");
-+
-+ r = sshd_selinux_getctxbyname(pwname, &default_ctx, &user_ctx);
-+ if (r >= 0) {
-+ r = setexeccon(user_ctx);
-+ if (r < 0) {
-+ error_f("Failed to set SELinux execution context %s for %s",
-+ user_ctx, pwname);
-+ }
-+#ifdef HAVE_SETKEYCREATECON
-+ else if (setkeycreatecon(user_ctx) < 0) {
-+ error_f("Failed to set SELinux keyring creation context %s for %s",
-+ user_ctx, pwname);
-+ }
-+#endif
-+ }
-+ if (user_ctx == NULL) {
-+ user_ctx = default_ctx;
-+ }
-+ if (r < 0 || user_ctx != default_ctx) {
-+ /* audit just the case when user changed a role or there was
-+ a failure */
-+ sshd_selinux_send_audit_message(r >= 0, default_ctx, user_ctx);
-+ }
-+ if (r < 0) {
-+ switch (security_getenforce()) {
-+ case -1:
-+ fatal_f("security_getenforce() failed");
-+ case 0:
-+ error_f("ELinux failure. Continuing in permissive mode.");
-+ break;
-+ default:
-+ fatal_f("SELinux failure. Aborting connection.");
-+ }
-+ }
-+ if (user_ctx != NULL && user_ctx != default_ctx)
-+ freecon(user_ctx);
-+ if (default_ctx != NULL)
-+ freecon(default_ctx);
-+
-+ debug3_f("done");
-+}
-+
-+#endif
-+#endif
-+
-diff -up openssh/platform.c.role-mls openssh/platform.c
---- openssh/platform.c.role-mls 2018-08-20 07:57:29.000000000 +0200
-+++ openssh/platform.c 2018-08-22 11:14:56.819430949 +0200
-@@ -183,7 +183,7 @@ platform_setusercontext_post_groups(stru
- }
- #endif /* HAVE_SETPCRED */
- #ifdef WITH_SELINUX
-- ssh_selinux_setup_exec_context(pw->pw_name);
-+ sshd_selinux_setup_exec_context(pw->pw_name);
- #endif
- }
-
-diff -up openssh/sshd.c.role-mls openssh/sshd.c
---- openssh/sshd.c.role-mls 2018-08-20 07:57:29.000000000 +0200
-+++ openssh/sshd.c 2018-08-22 11:14:56.820430957 +0200
-@@ -2186,6 +2186,9 @@ main(int ac, char **av)
- restore_uid();
- }
- #endif
-+#ifdef WITH_SELINUX
-+ sshd_selinux_setup_exec_context(authctxt->pw->pw_name);
-+#endif
- #ifdef USE_PAM
- if (options.use_pam) {
- do_pam_setcred(1);
generated by cgit v1.2.3 (git 2.25.1) at 2025-07-04 03:54:18 +0000