diff -up openssh-5.8p1/auth1.c.role openssh-5.8p1/auth1.c --- openssh-5.8p1/auth1.c.role 2010-08-31 14:36:39.000000000 +0200 +++ openssh-5.8p1/auth1.c 2011-03-22 18:32:17.907648664 +0100 @@ -384,6 +384,9 @@ 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); @@ -392,11 +395,24 @@ do_authentication(Authctxt *authctxt) user = packet_get_cstring(&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-5.8p1/auth2.c.role openssh-5.8p1/auth2.c --- openssh-5.8p1/auth2.c.role 2011-03-22 18:32:10.876648814 +0100 +++ openssh-5.8p1/auth2.c 2011-03-22 18:32:17.959648657 +0100 @@ -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; @@ -249,8 +257,15 @@ 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-5.8p1/auth2-gss.c.role openssh-5.8p1/auth2-gss.c --- openssh-5.8p1/auth2-gss.c.role 2007-12-02 12:59:45.000000000 +0100 +++ openssh-5.8p1/auth2-gss.c 2011-03-22 18:32:18.009679649 +0100 @@ -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-5.8p1/auth2-hostbased.c.role openssh-5.8p1/auth2-hostbased.c --- openssh-5.8p1/auth2-hostbased.c.role 2011-03-22 18:32:12.012648649 +0100 +++ openssh-5.8p1/auth2-hostbased.c 2011-03-22 18:32:18.052648698 +0100 @@ -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-5.8p1/auth2-pubkey.c.role openssh-5.8p1/auth2-pubkey.c --- openssh-5.8p1/auth2-pubkey.c.role 2011-03-22 18:32:16.318648486 +0100 +++ openssh-5.8p1/auth2-pubkey.c 2011-03-22 18:32:18.107648652 +0100 @@ -122,7 +122,15 @@ 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-5.8p1/auth.h.role openssh-5.8p1/auth.h --- openssh-5.8p1/auth.h.role 2011-03-22 18:32:12.117648630 +0100 +++ openssh-5.8p1/auth.h 2011-03-22 18:32:18.170648709 +0100 @@ -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-5.8p1/auth-pam.c.role openssh-5.8p1/auth-pam.c --- openssh-5.8p1/auth-pam.c.role 2009-07-12 14:07:21.000000000 +0200 +++ openssh-5.8p1/auth-pam.c 2011-03-22 18:32:18.230844134 +0100 @@ -1069,7 +1069,7 @@ 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; #ifdef HAVE_PAM_PUTENV diff -up openssh-5.8p1/auth-pam.h.role openssh-5.8p1/auth-pam.h --- openssh-5.8p1/auth-pam.h.role 2004-09-11 14:17:26.000000000 +0200 +++ openssh-5.8p1/auth-pam.h 2011-03-22 18:32:18.280648665 +0100 @@ -38,7 +38,7 @@ void do_pam_session(void); void do_pam_set_tty(const char *); 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-5.8p1/monitor.c.role openssh-5.8p1/monitor.c --- openssh-5.8p1/monitor.c.role 2011-03-22 18:32:14.465661970 +0100 +++ openssh-5.8p1/monitor.c 2011-03-22 18:32:18.337831292 +0100 @@ -140,6 +140,9 @@ 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 *); @@ -221,6 +224,9 @@ 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 @@ -708,6 +714,9 @@ 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); } @@ -752,6 +761,25 @@ 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) { @@ -1117,7 +1145,7 @@ static int monitor_valid_userblob(u_char *data, u_int datalen) { Buffer b; - char *p; + char *p, *r; u_int len; int fail = 0; @@ -1143,6 +1171,8 @@ 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); @@ -1174,7 +1204,7 @@ monitor_valid_hostbasedblob(u_char *data char *chost) { Buffer b; - char *p; + char *p, *r; u_int len; int fail = 0; @@ -1191,6 +1221,8 @@ 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-5.8p1/monitor.h.role openssh-5.8p1/monitor.h --- openssh-5.8p1/monitor.h.role 2011-03-22 18:32:14.512648974 +0100 +++ openssh-5.8p1/monitor.h 2011-03-22 18:32:18.382648691 +0100 @@ -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-5.8p1/monitor_wrap.c.role openssh-5.8p1/monitor_wrap.c --- openssh-5.8p1/monitor_wrap.c.role 2011-03-22 18:32:14.612774442 +0100 +++ openssh-5.8p1/monitor_wrap.c 2011-03-22 18:32:18.433648592 +0100 @@ -298,6 +298,25 @@ 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-5.8p1/monitor_wrap.h.role openssh-5.8p1/monitor_wrap.h --- openssh-5.8p1/monitor_wrap.h.role 2011-03-22 18:32:14.659648967 +0100 +++ openssh-5.8p1/monitor_wrap.h 2011-03-22 18:32:18.486648682 +0100 @@ -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-5.8p1/openbsd-compat/Makefile.in.role openssh-5.8p1/openbsd-compat/Makefile.in --- openssh-5.8p1/openbsd-compat/Makefile.in.role 2011-03-22 18:32:15.000000000 +0100 +++ openssh-5.8p1/openbsd-compat/Makefile.in 2011-03-22 18:34:43.962648778 +0100 @@ -20,7 +20,7 @@ OPENBSD=base64.o basename.o bindresvport COMPAT=bsd-arc4random.o bsd-asprintf.o bsd-closefrom.o bsd-cray.o bsd-cygwin_util.o bsd-getpeereid.o bsd-misc.o bsd-nextstep.o bsd-openpty.o bsd-poll.o bsd-snprintf.o bsd-statvfs.o bsd-waitpid.o fake-rfc2553.o openssl-compat.o xmmap.o xcrypt.o -PORTS=port-aix.o port-irix.o port-linux.o port-linux-prng.o port-solaris.o port-tun.o port-uw.o +PORTS=port-aix.o port-irix.o port-linux.o port-linux_part_2.o port-linux-prng.o port-solaris.o port-tun.o port-uw.o .c.o: $(CC) $(CFLAGS) $(CPPFLAGS) -c $< diff -up openssh-5.8p1/openbsd-compat/port-linux.c.role openssh-5.8p1/openbsd-compat/port-linux.c --- openssh-5.8p1/openbsd-compat/port-linux.c.role 2011-03-22 18:32:17.782648196 +0100 +++ openssh-5.8p1/openbsd-compat/port-linux.c 2011-03-22 18:32:18.604648721 +0100 @@ -31,48 +31,73 @@ #include "log.h" #include "xmalloc.h" +#include "servconf.h" #include "port-linux.h" +#include "key.h" +#include "hostfile.h" +#include "auth.h" #ifdef WITH_SELINUX #include #include #include -/* Wrapper around is_selinux_enabled() to log its return value once only */ -int -ssh_selinux_enabled(void) -{ - static int enabled = -1; +extern ServerOptions options; +extern Authctxt *the_authctxt; +extern int inetd_flag; +extern int rexeced_flag; - if (enabled == -1) { - enabled = (is_selinux_enabled() == 1); - debug("SELinux support %s", enabled ? "enabled" : "disabled"); +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 (enabled); } /* Return the default security context for the given username */ 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; + const char *reqlvl; + int r = 0; + ssh_selinux_get_role_level(&role, &reqlvl); #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()) { @@ -100,6 +125,36 @@ ssh_selinux_getctxbyname(char *pwname) return (sc); } +/* Setup environment variables for pam_selinux */ +static int +ssh_selinux_setup_pam_variables(void) +{ + const char *reqlvl; + char *role; + char *use_current; + int rv; + + debug3("%s: setting execution context", __func__); + + 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) + xfree(role); + + return rv; +} + /* Set the execution context to the default for the specified user */ void ssh_selinux_setup_exec_context(char *pwname) @@ -109,6 +164,24 @@ ssh_selinux_setup_exec_context(char *pwn if (!ssh_selinux_enabled()) return; + if (options.use_pam) { + /* do not compute context, just setup environment for pam_selinux */ + if (ssh_selinux_setup_pam_variables()) { + switch (security_getenforce()) { + case -1: + fatal("%s: security_getenforce() failed", __func__); + case 0: + error("%s: SELinux PAM variable setup failure. Continuing in permissive mode.", + __func__); + break; + default: + fatal("%s: SELinux PAM variable setup failure. Aborting connection.", + __func__); + } + } + return; + } + debug3("%s: setting execution context", __func__); user_ctx = ssh_selinux_getctxbyname(pwname); @@ -206,21 +279,6 @@ ssh_selinux_change_context(const char *n xfree(newctx); } -void -ssh_selinux_setfscreatecon(const char *path) -{ - security_context_t context; - - if (!ssh_selinux_enabled()) - return; - if (path == NULL) { - setfscreatecon(NULL); - return; - } - if (matchpathcon(path, 0700, &context) == 0) - setfscreatecon(context); -} - #endif /* WITH_SELINUX */ #ifdef LINUX_OOM_ADJUST diff -up openssh-5.8p1/openbsd-compat/port-linux_part_2.c.role openssh-5.8p1/openbsd-compat/port-linux_part_2.c --- openssh-5.8p1/openbsd-compat/port-linux_part_2.c.role 2011-03-22 18:32:18.632648682 +0100 +++ openssh-5.8p1/openbsd-compat/port-linux_part_2.c 2011-03-22 18:32:18.641648698 +0100 @@ -0,0 +1,75 @@ +/* $Id: port-linux.c,v 1.11.4.2 2011/02/04 00:43:08 djm Exp $ */ + +/* + * Copyright (c) 2005 Daniel Walsh + * Copyright (c) 2006 Damien Miller + * + * 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 at present + */ + +#include "includes.h" + +#if defined(WITH_SELINUX) || defined(LINUX_OOM_ADJUST) +#include +#include +#include +#include + +#include "log.h" +#include "xmalloc.h" +#include "port-linux.h" +#include "key.h" +#include "hostfile.h" +#include "auth.h" + +#ifdef WITH_SELINUX +#include +#include +#include + +/* Wrapper around is_selinux_enabled() to log its return value once only */ +int +ssh_selinux_enabled(void) +{ + static int enabled = -1; + + if (enabled == -1) { + enabled = (is_selinux_enabled() == 1); + debug("SELinux support %s", enabled ? "enabled" : "disabled"); + } + + return (enabled); +} + +void +ssh_selinux_setfscreatecon(const char *path) +{ + security_context_t context; + + if (!ssh_selinux_enabled()) + return; + if (path == NULL) { + setfscreatecon(NULL); + return; + } + if (matchpathcon(path, 0700, &context) == 0) + setfscreatecon(context); +} + +#endif /* WITH_SELINUX */ + +#endif /* WITH_SELINUX || LINUX_OOM_ADJUST */