+/* $OpenBSD: monitor.c,v 1.104 2009/06/12 20:43:22 andreas Exp $ */
/*
* Copyright 2002 Niels Provos <provos@citi.umich.edu>
* Copyright 2002 Markus Friedl <markus@openbsd.org>
*/
#include "includes.h"
-RCSID("$OpenBSD: monitor.c,v 1.18 2002/06/26 13:20:57 deraadt Exp $");
-#include <openssl/dh.h>
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/socket.h>
+#include "openbsd-compat/sys-tree.h"
+#include <sys/wait.h>
+
+#include <errno.h>
+#include <fcntl.h>
+#ifdef HAVE_PATHS_H
+#include <paths.h>
+#endif
+#include <pwd.h>
+#include <signal.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
#ifdef SKEY
#include <skey.h>
#endif
+#include <openssl/dh.h>
+
+#include "openbsd-compat/sys-queue.h"
+#include "xmalloc.h"
#include "ssh.h"
+#include "key.h"
+#include "buffer.h"
+#include "hostfile.h"
#include "auth.h"
+#include "cipher.h"
#include "kex.h"
#include "dh.h"
+#ifdef TARGET_OS_MAC /* XXX Broken krb5 headers on Mac */
+#undef TARGET_OS_MAC
+#include "zlib.h"
+#define TARGET_OS_MAC 1
+#else
#include "zlib.h"
+#endif
#include "packet.h"
#include "auth-options.h"
#include "sshpty.h"
#include "servconf.h"
#include "monitor.h"
#include "monitor_mm.h"
+#ifdef GSSAPI
+#include "ssh-gss.h"
+#endif
#include "monitor_wrap.h"
#include "monitor_fdpass.h"
-#include "xmalloc.h"
#include "misc.h"
-#include "buffer.h"
-#include "bufaux.h"
#include "compat.h"
#include "ssh2.h"
-#include "mpaux.h"
+#include "jpake.h"
+#include "roaming.h"
#ifdef GSSAPI
-#include "ssh-gss.h"
static Gssctxt *gsscontext = NULL;
#endif
extern z_stream incoming_stream;
extern z_stream outgoing_stream;
extern u_char session_id[];
-extern Buffer input, output;
extern Buffer auth_debug;
extern int auth_debug_init;
+extern Buffer loginmsg;
/* State exported from the child */
u_int ilen;
u_char *output;
u_int olen;
+ u_int64_t sent_bytes;
+ u_int64_t recv_bytes;
} child_state;
-/* Functions on the montior that answer unprivileged requests */
+/* Functions on the monitor that answer unprivileged requests */
int mm_answer_moduli(int, Buffer *);
int mm_answer_sign(int, Buffer *);
int mm_answer_rsa_response(int, Buffer *);
int mm_answer_sesskey(int, Buffer *);
int mm_answer_sessid(int, Buffer *);
+int mm_answer_jpake_get_pwdata(int, Buffer *);
+int mm_answer_jpake_step1(int, Buffer *);
+int mm_answer_jpake_step2(int, Buffer *);
+int mm_answer_jpake_key_confirm(int, Buffer *);
+int mm_answer_jpake_check_confirm(int, Buffer *);
#ifdef USE_PAM
int mm_answer_pam_start(int, Buffer *);
+int mm_answer_pam_account(int, Buffer *);
+int mm_answer_pam_init_ctx(int, Buffer *);
+int mm_answer_pam_query(int, Buffer *);
+int mm_answer_pam_respond(int, Buffer *);
+int mm_answer_pam_free_ctx(int, Buffer *);
#endif
#ifdef GSSAPI
int mm_answer_gss_setup_ctx(int, Buffer *);
int mm_answer_gss_accept_ctx(int, Buffer *);
int mm_answer_gss_userok(int, Buffer *);
-int mm_answer_gss_localname(int, Buffer *);
+int mm_answer_gss_checkmic(int, Buffer *);
int mm_answer_gss_sign(int, Buffer *);
+int mm_answer_gss_error(int, Buffer *);
int mm_answer_gss_indicate_mechs(int, Buffer *);
-int mm_answer_gss_display_status(int, Buffer *);
+int mm_answer_gss_localname(int, Buffer *);
+int mm_answer_gss_updatecreds(int, Buffer *);
#endif
-#ifdef GSI
-int mm_answer_gsi_gridmap(int, Buffer *);
+#ifdef SSH_AUDIT_EVENTS
+int mm_answer_audit_event(int, Buffer *);
+int mm_answer_audit_command(int, Buffer *);
#endif
static Authctxt *authctxt;
static u_char *key_blob = NULL;
static u_int key_bloblen = 0;
static int key_blobtype = MM_NOKEY;
-static u_char *hostbased_cuser = NULL;
-static u_char *hostbased_chost = NULL;
+static char *hostbased_cuser = NULL;
+static char *hostbased_chost = NULL;
static char *auth_method = "unknown";
-static int session_id2_len = 0;
+static u_int session_id2_len = 0;
static u_char *session_id2 = NULL;
+static pid_t monitor_child_pid;
struct mon_table {
enum monitor_reqtype type;
#define MON_ISAUTH 0x0004 /* Required for Authentication */
#define MON_AUTHDECIDE 0x0008 /* Decides Authentication */
#define MON_ONCE 0x0010 /* Disable after calling */
+#define MON_ALOG 0x0020 /* Log auth attempt without authenticating */
#define MON_AUTH (MON_ISAUTH|MON_AUTHDECIDE)
{MONITOR_REQ_AUTHPASSWORD, MON_AUTH, mm_answer_authpassword},
#ifdef USE_PAM
{MONITOR_REQ_PAM_START, MON_ISAUTH, mm_answer_pam_start},
+ {MONITOR_REQ_PAM_ACCOUNT, 0, mm_answer_pam_account},
+ {MONITOR_REQ_PAM_INIT_CTX, MON_ISAUTH, mm_answer_pam_init_ctx},
+ {MONITOR_REQ_PAM_QUERY, MON_ISAUTH, mm_answer_pam_query},
+ {MONITOR_REQ_PAM_RESPOND, MON_ISAUTH, mm_answer_pam_respond},
+ {MONITOR_REQ_PAM_FREE_CTX, MON_ONCE|MON_AUTHDECIDE, mm_answer_pam_free_ctx},
+#endif
+#ifdef SSH_AUDIT_EVENTS
+ {MONITOR_REQ_AUDIT_EVENT, MON_PERMIT, mm_answer_audit_event},
#endif
#ifdef BSD_AUTH
{MONITOR_REQ_BSDAUTHQUERY, MON_ISAUTH, mm_answer_bsdauthquery},
- {MONITOR_REQ_BSDAUTHRESPOND, MON_AUTH,mm_answer_bsdauthrespond},
+ {MONITOR_REQ_BSDAUTHRESPOND, MON_AUTH, mm_answer_bsdauthrespond},
#endif
#ifdef SKEY
{MONITOR_REQ_SKEYQUERY, MON_ISAUTH, mm_answer_skeyquery},
{MONITOR_REQ_SKEYRESPOND, MON_AUTH, mm_answer_skeyrespond},
#endif
+ {MONITOR_REQ_KEYALLOWED, MON_ISAUTH, mm_answer_keyallowed},
+ {MONITOR_REQ_KEYVERIFY, MON_AUTH, mm_answer_keyverify},
#ifdef GSSAPI
{MONITOR_REQ_GSSSETUP, MON_ISAUTH, mm_answer_gss_setup_ctx},
{MONITOR_REQ_GSSSTEP, MON_ISAUTH, mm_answer_gss_accept_ctx},
+ {MONITOR_REQ_GSSUSEROK, MON_AUTH, mm_answer_gss_userok},
+ {MONITOR_REQ_GSSCHECKMIC, MON_ISAUTH, mm_answer_gss_checkmic},
{MONITOR_REQ_GSSSIGN, MON_ONCE, mm_answer_gss_sign},
+ {MONITOR_REQ_GSSERR, MON_ISAUTH | MON_ONCE, mm_answer_gss_error},
{MONITOR_REQ_GSSMECHS, MON_ISAUTH, mm_answer_gss_indicate_mechs},
- {MONITOR_REQ_GSSSTAT, MON_ISAUTH, mm_answer_gss_display_status},
- {MONITOR_REQ_GSSUSEROK, MON_AUTH, mm_answer_gss_userok},
- {MONITOR_REQ_GSSLOCALNAME, MON_AUTH, mm_answer_gss_localname},
+ {MONITOR_REQ_GSSLOCALNAME, MON_ISAUTH, mm_answer_gss_localname},
+#endif
+#ifdef JPAKE
+ {MONITOR_REQ_JPAKE_GET_PWDATA, MON_ONCE, mm_answer_jpake_get_pwdata},
+ {MONITOR_REQ_JPAKE_STEP1, MON_ISAUTH, mm_answer_jpake_step1},
+ {MONITOR_REQ_JPAKE_STEP2, MON_ONCE, mm_answer_jpake_step2},
+ {MONITOR_REQ_JPAKE_KEY_CONFIRM, MON_ONCE, mm_answer_jpake_key_confirm},
+ {MONITOR_REQ_JPAKE_CHECK_CONFIRM, MON_AUTH, mm_answer_jpake_check_confirm},
#endif
- {MONITOR_REQ_KEYALLOWED, MON_ISAUTH, mm_answer_keyallowed},
- {MONITOR_REQ_KEYVERIFY, MON_AUTH, mm_answer_keyverify},
{0, 0, NULL}
};
{MONITOR_REQ_GSSSETUP, 0, mm_answer_gss_setup_ctx},
{MONITOR_REQ_GSSSTEP, 0, mm_answer_gss_accept_ctx},
{MONITOR_REQ_GSSSIGN, 0, mm_answer_gss_sign},
+ {MONITOR_REQ_GSSERR, 0, mm_answer_gss_error},
{MONITOR_REQ_GSSMECHS, 0, mm_answer_gss_indicate_mechs},
- {MONITOR_REQ_GSSSTAT, 0, mm_answer_gss_display_status},
+ {MONITOR_REQ_GSSUPCREDS, 0, mm_answer_gss_updatecreds},
#endif
{MONITOR_REQ_MODULI, 0, mm_answer_moduli},
{MONITOR_REQ_SIGN, 0, mm_answer_sign},
{MONITOR_REQ_PTY, 0, mm_answer_pty},
{MONITOR_REQ_PTYCLEANUP, 0, mm_answer_pty_cleanup},
{MONITOR_REQ_TERM, 0, mm_answer_term},
+#ifdef SSH_AUDIT_EVENTS
+ {MONITOR_REQ_AUDIT_EVENT, MON_PERMIT, mm_answer_audit_event},
+ {MONITOR_REQ_AUDIT_COMMAND, MON_PERMIT, mm_answer_audit_command},
+#endif
{0, 0, NULL}
};
{MONITOR_REQ_SESSKEY, MON_ONCE, mm_answer_sesskey},
{MONITOR_REQ_SESSID, MON_ONCE, mm_answer_sessid},
{MONITOR_REQ_AUTHPASSWORD, MON_AUTH, mm_answer_authpassword},
- {MONITOR_REQ_RSAKEYALLOWED, MON_ISAUTH, mm_answer_rsa_keyallowed},
- {MONITOR_REQ_KEYALLOWED, MON_ISAUTH, mm_answer_keyallowed},
+ {MONITOR_REQ_RSAKEYALLOWED, MON_ISAUTH|MON_ALOG, mm_answer_rsa_keyallowed},
+ {MONITOR_REQ_KEYALLOWED, MON_ISAUTH|MON_ALOG, mm_answer_keyallowed},
{MONITOR_REQ_RSACHALLENGE, MON_ONCE, mm_answer_rsa_challenge},
{MONITOR_REQ_RSARESPONSE, MON_ONCE|MON_AUTHDECIDE, mm_answer_rsa_response},
#ifdef BSD_AUTH
{MONITOR_REQ_BSDAUTHQUERY, MON_ISAUTH, mm_answer_bsdauthquery},
- {MONITOR_REQ_BSDAUTHRESPOND, MON_AUTH,mm_answer_bsdauthrespond},
+ {MONITOR_REQ_BSDAUTHRESPOND, MON_AUTH, mm_answer_bsdauthrespond},
#endif
#ifdef SKEY
{MONITOR_REQ_SKEYQUERY, MON_ISAUTH, mm_answer_skeyquery},
{MONITOR_REQ_GSSSIGN, MON_ONCE, mm_answer_gss_sign},
{MONITOR_REQ_GSSUSEROK, MON_AUTH, mm_answer_gss_userok},
{MONITOR_REQ_GSSMECHS, MON_ISAUTH, mm_answer_gss_indicate_mechs},
- {MONITOR_REQ_GSSSTAT, MON_ISAUTH, mm_answer_gss_display_status},
-#endif
-#ifdef GSI
- {MONITOR_REQ_GSIGRIDMAP, MON_PERMIT, mm_answer_gsi_gridmap},
#endif
#ifdef USE_PAM
{MONITOR_REQ_PAM_START, MON_ISAUTH, mm_answer_pam_start},
+ {MONITOR_REQ_PAM_ACCOUNT, 0, mm_answer_pam_account},
+ {MONITOR_REQ_PAM_INIT_CTX, MON_ISAUTH, mm_answer_pam_init_ctx},
+ {MONITOR_REQ_PAM_QUERY, MON_ISAUTH, mm_answer_pam_query},
+ {MONITOR_REQ_PAM_RESPOND, MON_ISAUTH, mm_answer_pam_respond},
+ {MONITOR_REQ_PAM_FREE_CTX, MON_ONCE|MON_AUTHDECIDE, mm_answer_pam_free_ctx},
+#endif
+#ifdef SSH_AUDIT_EVENTS
+ {MONITOR_REQ_AUDIT_EVENT, MON_PERMIT, mm_answer_audit_event},
#endif
{0, 0, NULL}
};
struct mon_table mon_dispatch_postauth15[] = {
-#ifdef GSSAPI
- {MONITOR_REQ_GSSSETUP, 0, mm_answer_gss_setup_ctx},
- {MONITOR_REQ_GSSSTEP, 0, mm_answer_gss_accept_ctx},
- {MONITOR_REQ_GSSSIGN, 0, mm_answer_gss_sign},
- {MONITOR_REQ_GSSMECHS, 0, mm_answer_gss_indicate_mechs},
- {MONITOR_REQ_GSSSTAT, 0, mm_answer_gss_display_status},
-#endif
{MONITOR_REQ_PTY, MON_ONCE, mm_answer_pty},
{MONITOR_REQ_PTYCLEANUP, MON_ONCE, mm_answer_pty_cleanup},
{MONITOR_REQ_TERM, 0, mm_answer_term},
+#ifdef SSH_AUDIT_EVENTS
+ {MONITOR_REQ_AUDIT_EVENT, MON_PERMIT, mm_answer_audit_event},
+ {MONITOR_REQ_AUDIT_COMMAND, MON_PERMIT|MON_ONCE, mm_answer_audit_command},
+#endif
{0, 0, NULL}
};
}
}
-Authctxt *
-monitor_child_preauth(struct monitor *pmonitor)
+void
+monitor_child_preauth(Authctxt *_authctxt, struct monitor *pmonitor)
{
struct mon_table *ent;
int authenticated = 0;
debug3("preauth child monitor started");
+ authctxt = _authctxt;
+ memset(authctxt, 0, sizeof(*authctxt));
+
+ authctxt->loginmsg = &loginmsg;
+
if (compat20) {
mon_dispatch = mon_dispatch_proto20;
#ifdef GSSAPI
/* and for the GSSAPI key exchange */
monitor_permit(mon_dispatch, MONITOR_REQ_GSSSETUP, 1);
- monitor_permit(mon_dispatch, MONITOR_REQ_GSSSTEP, 1);
- monitor_permit(mon_dispatch, MONITOR_REQ_GSSSIGN, 1);
+ monitor_permit(mon_dispatch, MONITOR_REQ_GSSERR, 1);
monitor_permit(mon_dispatch, MONITOR_REQ_GSSMECHS, 1);
- monitor_permit(mon_dispatch, MONITOR_REQ_GSSSTAT, 1);
#endif
} else {
mon_dispatch = mon_dispatch_proto15;
monitor_permit(mon_dispatch, MONITOR_REQ_SESSKEY, 1);
-#ifdef GSSAPI
- monitor_permit(mon_dispatch, MONITOR_REQ_GSSSIGN, 1);
- monitor_permit(mon_dispatch, MONITOR_REQ_GSSMECHS, 1);
- monitor_permit(mon_dispatch, MONITOR_REQ_GSSSTAT, 1);
-#endif
-#ifdef GSI
- monitor_permit(mon_dispatch, MONITOR_REQ_GSIGRIDMAP, 1);
-#endif
}
- authctxt = authctxt_new();
-
/* The first few requests do not require asynchronous access */
while (!authenticated) {
- authenticated = monitor_read(pmonitor, mon_dispatch, &ent);
+ auth_method = "unknown";
+ authenticated = (monitor_read(pmonitor, mon_dispatch, &ent) == 1);
if (authenticated) {
if (!(ent->flags & MON_AUTHDECIDE))
fatal("%s: unexpected authentication from %d",
!auth_root_allowed(auth_method))
authenticated = 0;
#ifdef USE_PAM
- if (!do_pam_account(authctxt->pw->pw_name, NULL))
- authenticated = 0;
+ /* PAM needs to perform account checks after auth */
+ if (options.use_pam && authenticated) {
+ Buffer m;
+
+ buffer_init(&m);
+ mm_request_receive_expect(pmonitor->m_sendfd,
+ MONITOR_REQ_PAM_ACCOUNT, &m);
+ authenticated = mm_answer_pam_account(pmonitor->m_sendfd, &m);
+ buffer_free(&m);
+ }
#endif
}
- if (ent->flags & MON_AUTHDECIDE) {
+ if (ent->flags & (MON_AUTHDECIDE|MON_ALOG)) {
auth_log(authctxt, authenticated, auth_method,
compat20 ? " ssh2" : "");
if (!authenticated)
authctxt->failures++;
}
+#ifdef JPAKE
+ /* Cleanup JPAKE context after authentication */
+ if (ent->flags & MON_AUTHDECIDE) {
+ if (authctxt->jpake_ctx != NULL) {
+ jpake_free(authctxt->jpake_ctx);
+ authctxt->jpake_ctx = NULL;
+ }
+ }
+#endif
}
if (!authctxt->valid)
fatal("%s: authenticated invalid user", __func__);
+ if (strcmp(auth_method, "unknown") == 0)
+ fatal("%s: authentication method name unknown", __func__);
debug("%s: %s has been authenticated by privileged process",
__func__, authctxt->user);
mm_get_keystate(pmonitor);
+}
+
+static void
+monitor_set_child_handler(pid_t pid)
+{
+ monitor_child_pid = pid;
+}
- return (authctxt);
+static void
+monitor_child_handler(int sig)
+{
+ kill(monitor_child_pid, sig);
}
void
monitor_child_postauth(struct monitor *pmonitor)
{
+ monitor_set_child_handler(pmonitor->m_pid);
+ signal(SIGHUP, &monitor_child_handler);
+ signal(SIGTERM, &monitor_child_handler);
+ signal(SIGINT, &monitor_child_handler);
+
if (compat20) {
mon_dispatch = mon_dispatch_postauth20;
monitor_permit(mon_dispatch, MONITOR_REQ_SIGN, 1);
monitor_permit(mon_dispatch, MONITOR_REQ_TERM, 1);
+#ifdef GSSAPI
+ /* and for the GSSAPI key exchange */
+ monitor_permit(mon_dispatch, MONITOR_REQ_GSSMECHS,1);
+ monitor_permit(mon_dispatch, MONITOR_REQ_GSSSETUP,1);
+ monitor_permit(mon_dispatch, MONITOR_REQ_GSSERR,1);
+#endif
+
} else {
mon_dispatch = mon_dispatch_postauth15;
monitor_permit(mon_dispatch, MONITOR_REQ_TERM, 1);
}
#ifdef GSSAPI
- monitor_permit(mon_dispatch, MONITOR_REQ_GSSSTAT, 1);
+ monitor_permit(mon_dispatch, MONITOR_REQ_GSSERR, 1);
#endif
if (!no_pty_flag) {
monitor_permit(mon_dispatch, MONITOR_REQ_PTY, 1);
}
int
-mm_answer_moduli(int socket, Buffer *m)
+mm_answer_moduli(int sock, Buffer *m)
{
DH *dh;
int min, want, max;
DH_free(dh);
}
- mm_request_send(socket, MONITOR_ANS_MODULI, m);
+ mm_request_send(sock, MONITOR_ANS_MODULI, m);
return (0);
}
int
-mm_answer_sign(int socket, Buffer *m)
+mm_answer_sign(int sock, Buffer *m)
{
Key *key;
u_char *p;
keyid = buffer_get_int(m);
p = buffer_get_string(m, &datlen);
- if (datlen != 20)
- fatal("%s: data length incorrect: %d", __func__, datlen);
+ /*
+ * Supported KEX types will only return SHA1 (20 byte) or
+ * SHA256 (32 byte) hashes
+ */
+ if (datlen != 20 && datlen != 32)
+ fatal("%s: data length incorrect: %u", __func__, datlen);
/* save session id, it will be passed on the first call */
if (session_id2_len == 0) {
if (key_sign(key, &signature, &siglen, p, datlen) < 0)
fatal("%s: key_sign failed", __func__);
- debug3("%s: signature %p(%d)", __func__, signature, siglen);
+ debug3("%s: signature %p(%u)", __func__, signature, siglen);
buffer_clear(m);
buffer_put_string(m, signature, siglen);
xfree(p);
xfree(signature);
- mm_request_send(socket, MONITOR_ANS_SIGN, m);
+ mm_request_send(sock, MONITOR_ANS_SIGN, m);
/* Turn on permissions for getpwnam */
monitor_permit(mon_dispatch, MONITOR_REQ_PWNAM, 1);
/* Retrieves the password entry and also checks if the user is permitted */
int
-mm_answer_pwnamallow(int socket, Buffer *m)
+mm_answer_pwnamallow(int sock, Buffer *m)
{
- char *login;
+ char *username;
struct passwd *pwent;
int allowed = 0;
debug3("%s", __func__);
- login = buffer_get_string(m, NULL);
+ username = buffer_get_string(m, NULL);
- pwent = getpwnamallow(login);
+ pwent = getpwnamallow(username);
if (authctxt->user) xfree(authctxt->user);
- authctxt->user = xstrdup(login);
- setproctitle("%s [priv]", pwent ? login : "unknown");
- xfree(login);
+ authctxt->user = xstrdup(username);
+#ifdef USE_PAM
+ if (options.permit_pam_user_change)
+ setproctitle("%s [priv]", pwent ? "[pam]" : "unknown");
+ else
+#endif
+ setproctitle("%s [priv]", pwent ? username : "unknown");
+ xfree(username);
buffer_clear(m);
if (pwent == NULL) {
buffer_put_char(m, 0);
+ authctxt->pw = fakepw();
goto out;
}
buffer_put_cstring(m, pwent->pw_shell);
out:
+ buffer_put_string(m, &options, sizeof(options));
+ if (options.banner != NULL)
+ buffer_put_cstring(m, options.banner);
debug3("%s: sending MONITOR_ANS_PWNAM: %d", __func__, allowed);
- mm_request_send(socket, MONITOR_ANS_PWNAM, m);
+ mm_request_send(sock, MONITOR_ANS_PWNAM, m);
/* For SSHv1 allow authentication now */
if (!compat20)
}
#ifdef USE_PAM
- monitor_permit(mon_dispatch, MONITOR_REQ_PAM_START, 1);
+ if (options.use_pam)
+ monitor_permit(mon_dispatch, MONITOR_REQ_PAM_START, 1);
#endif
return (0);
}
-int mm_answer_auth2_read_banner(int socket, Buffer *m)
+int mm_answer_auth2_read_banner(int sock, Buffer *m)
{
char *banner;
buffer_clear(m);
banner = auth2_read_banner();
buffer_put_cstring(m, banner != NULL ? banner : "");
- mm_request_send(socket, MONITOR_ANS_AUTH2_READ_BANNER, m);
+ mm_request_send(sock, MONITOR_ANS_AUTH2_READ_BANNER, m);
if (banner != NULL)
- free(banner);
+ xfree(banner);
return (0);
}
int
-mm_answer_authserv(int socket, Buffer *m)
+mm_answer_authserv(int sock, Buffer *m)
{
monitor_permit_authentications(1);
}
int
-mm_answer_authpassword(int socket, Buffer *m)
+mm_answer_authpassword(int sock, Buffer *m)
{
static int call_count;
char *passwd;
- int authenticated, plen;
+ int authenticated;
+ u_int plen;
passwd = buffer_get_string(m, &plen);
/* Only authenticate if the context is valid */
authenticated = options.password_authentication &&
- authctxt->valid && auth_password(authctxt, passwd);
+ auth_password(authctxt, passwd);
memset(passwd, 0, strlen(passwd));
xfree(passwd);
buffer_put_int(m, authenticated);
debug3("%s: sending result %d", __func__, authenticated);
- mm_request_send(socket, MONITOR_ANS_AUTHPASSWORD, m);
+ mm_request_send(sock, MONITOR_ANS_AUTHPASSWORD, m);
call_count++;
if (plen == 0 && call_count == 1)
#ifdef BSD_AUTH
int
-mm_answer_bsdauthquery(int socket, Buffer *m)
+mm_answer_bsdauthquery(int sock, Buffer *m)
{
char *name, *infotxt;
u_int numprompts;
u_int *echo_on;
char **prompts;
- int res;
+ u_int success;
- res = bsdauth_query(authctxt, &name, &infotxt, &numprompts,
- &prompts, &echo_on);
+ success = bsdauth_query(authctxt, &name, &infotxt, &numprompts,
+ &prompts, &echo_on) < 0 ? 0 : 1;
buffer_clear(m);
- buffer_put_int(m, res);
- if (res != -1)
+ buffer_put_int(m, success);
+ if (success)
buffer_put_cstring(m, prompts[0]);
- debug3("%s: sending challenge res: %d", __func__, res);
- mm_request_send(socket, MONITOR_ANS_BSDAUTHQUERY, m);
+ debug3("%s: sending challenge success: %u", __func__, success);
+ mm_request_send(sock, MONITOR_ANS_BSDAUTHQUERY, m);
- if (res != -1) {
+ if (success) {
xfree(name);
xfree(infotxt);
xfree(prompts);
}
int
-mm_answer_bsdauthrespond(int socket, Buffer *m)
+mm_answer_bsdauthrespond(int sock, Buffer *m)
{
char *response;
int authok;
buffer_put_int(m, authok);
debug3("%s: sending authenticated: %d", __func__, authok);
- mm_request_send(socket, MONITOR_ANS_BSDAUTHRESPOND, m);
+ mm_request_send(sock, MONITOR_ANS_BSDAUTHRESPOND, m);
auth_method = "bsdauth";
#ifdef SKEY
int
-mm_answer_skeyquery(int socket, Buffer *m)
+mm_answer_skeyquery(int sock, Buffer *m)
{
struct skey skey;
char challenge[1024];
- int res;
+ u_int success;
- res = skeychallenge(&skey, authctxt->user, challenge);
+ success = _compat_skeychallenge(&skey, authctxt->user, challenge,
+ sizeof(challenge)) < 0 ? 0 : 1;
buffer_clear(m);
- buffer_put_int(m, res);
- if (res != -1)
+ buffer_put_int(m, success);
+ if (success)
buffer_put_cstring(m, challenge);
- debug3("%s: sending challenge res: %d", __func__, res);
- mm_request_send(socket, MONITOR_ANS_SKEYQUERY, m);
+ debug3("%s: sending challenge success: %u", __func__, success);
+ mm_request_send(sock, MONITOR_ANS_SKEYQUERY, m);
return (0);
}
int
-mm_answer_skeyrespond(int socket, Buffer *m)
+mm_answer_skeyrespond(int sock, Buffer *m)
{
char *response;
int authok;
buffer_put_int(m, authok);
debug3("%s: sending authenticated: %d", __func__, authok);
- mm_request_send(socket, MONITOR_ANS_SKEYRESPOND, m);
+ mm_request_send(sock, MONITOR_ANS_SKEYRESPOND, m);
auth_method = "skey";
#ifdef USE_PAM
int
-mm_answer_pam_start(int socket, Buffer *m)
+mm_answer_pam_start(int sock, Buffer *m)
{
- char *user;
-
- user = buffer_get_string(m, NULL);
+ if (!options.use_pam)
+ fatal("UsePAM not set, but ended up in %s anyway", __func__);
+
+ start_pam(authctxt);
+
+ monitor_permit(mon_dispatch, MONITOR_REQ_PAM_ACCOUNT, 1);
+
+ return (0);
+}
+
+int
+mm_answer_pam_account(int sock, Buffer *m)
+{
+ u_int ret;
+
+ if (!options.use_pam)
+ fatal("UsePAM not set, but ended up in %s anyway", __func__);
+
+ ret = do_pam_account();
+
+ buffer_put_int(m, ret);
+ buffer_put_string(m, buffer_ptr(&loginmsg), buffer_len(&loginmsg));
+
+ mm_request_send(sock, MONITOR_ANS_PAM_ACCOUNT, m);
+
+ return (ret);
+}
- start_pam(user);
+static void *sshpam_ctxt, *sshpam_authok;
+extern KbdintDevice sshpam_device;
- xfree(user);
+int
+mm_answer_pam_init_ctx(int sock, Buffer *m)
+{
+
+ debug3("%s", __func__);
+ authctxt->user = buffer_get_string(m, NULL);
+ sshpam_ctxt = (sshpam_device.init_ctx)(authctxt);
+ sshpam_authok = NULL;
+ buffer_clear(m);
+ if (sshpam_ctxt != NULL) {
+ monitor_permit(mon_dispatch, MONITOR_REQ_PAM_FREE_CTX, 1);
+ buffer_put_int(m, 1);
+ } else {
+ buffer_put_int(m, 0);
+ }
+ mm_request_send(sock, MONITOR_ANS_PAM_INIT_CTX, m);
+ return (0);
+}
+
+int
+mm_answer_pam_query(int sock, Buffer *m)
+{
+ char *name, *info, **prompts;
+ u_int i, num, *echo_on;
+ int ret;
+ debug3("%s", __func__);
+ sshpam_authok = NULL;
+ ret = (sshpam_device.query)(sshpam_ctxt, &name, &info, &num, &prompts, &echo_on);
+ if (ret == 0 && num == 0)
+ sshpam_authok = sshpam_ctxt;
+ if (num > 1 || name == NULL || info == NULL)
+ ret = -1;
+ buffer_clear(m);
+ buffer_put_int(m, ret);
+ buffer_put_cstring(m, name);
+ xfree(name);
+ buffer_put_cstring(m, info);
+ xfree(info);
+ buffer_put_int(m, num);
+ for (i = 0; i < num; ++i) {
+ buffer_put_cstring(m, prompts[i]);
+ xfree(prompts[i]);
+ buffer_put_int(m, echo_on[i]);
+ }
+ if (prompts != NULL)
+ xfree(prompts);
+ if (echo_on != NULL)
+ xfree(echo_on);
+ auth_method = "keyboard-interactive/pam";
+ mm_request_send(sock, MONITOR_ANS_PAM_QUERY, m);
return (0);
}
+
+int
+mm_answer_pam_respond(int sock, Buffer *m)
+{
+ char **resp;
+ u_int i, num;
+ int ret;
+
+ debug3("%s", __func__);
+ sshpam_authok = NULL;
+ num = buffer_get_int(m);
+ if (num > 0) {
+ resp = xcalloc(num, sizeof(char *));
+ for (i = 0; i < num; ++i)
+ resp[i] = buffer_get_string(m, NULL);
+ ret = (sshpam_device.respond)(sshpam_ctxt, num, resp);
+ for (i = 0; i < num; ++i)
+ xfree(resp[i]);
+ xfree(resp);
+ } else {
+ ret = (sshpam_device.respond)(sshpam_ctxt, num, NULL);
+ }
+ buffer_clear(m);
+ buffer_put_int(m, ret);
+ mm_request_send(sock, MONITOR_ANS_PAM_RESPOND, m);
+ auth_method = "keyboard-interactive/pam";
+ if (ret == 0)
+ sshpam_authok = sshpam_ctxt;
+ return (0);
+}
+
+int
+mm_answer_pam_free_ctx(int sock, Buffer *m)
+{
+
+ debug3("%s", __func__);
+ (sshpam_device.free_ctx)(sshpam_ctxt);
+ buffer_clear(m);
+ mm_request_send(sock, MONITOR_ANS_PAM_FREE_CTX, m);
+ auth_method = "keyboard-interactive/pam";
+ return (sshpam_authok == sshpam_ctxt);
+}
#endif
static void
}
int
-mm_answer_keyallowed(int socket, Buffer *m)
+mm_answer_keyallowed(int sock, Buffer *m)
{
Key *key;
- u_char *cuser, *chost, *blob;
+ char *cuser, *chost;
+ u_char *blob;
u_int bloblen;
enum mm_keytype type = 0;
int allowed = 0;
debug3("%s: key_from_blob: %p", __func__, key);
- if (key != NULL && authctxt->pw != NULL) {
- switch(type) {
+ if (key != NULL && authctxt->valid) {
+ switch (type) {
case MM_USERKEY:
allowed = options.pubkey_authentication &&
user_key_allowed(authctxt->pw, key);
+ auth_method = "publickey";
+ if (options.pubkey_authentication && allowed != 1)
+ auth_clear_options();
break;
case MM_HOSTKEY:
allowed = options.hostbased_authentication &&
hostbased_key_allowed(authctxt->pw,
cuser, chost, key);
+ auth_method = "hostbased";
break;
case MM_RSAHOSTKEY:
key->type = KEY_RSA1; /* XXX */
allowed = options.rhosts_rsa_authentication &&
auth_rhosts_rsa_key_allowed(authctxt->pw,
cuser, chost, key);
+ if (options.rhosts_rsa_authentication && allowed != 1)
+ auth_clear_options();
+ auth_method = "rsa";
break;
default:
fatal("%s: unknown key type %d", __func__, type);
break;
}
- key_free(key);
}
+ if (key != NULL)
+ key_free(key);
/* clear temporarily storage (used by verify) */
monitor_reset_key_state();
key_blobtype = type;
hostbased_cuser = cuser;
hostbased_chost = chost;
+ } else {
+ /* Log failed attempt */
+ auth_log(authctxt, 0, auth_method, compat20 ? " ssh2" : "");
+ xfree(blob);
+ xfree(cuser);
+ xfree(chost);
}
debug3("%s: key %p is %s",
- __func__, key, allowed ? "allowed" : "disallowed");
+ __func__, key, allowed ? "allowed" : "not allowed");
buffer_clear(m);
buffer_put_int(m, allowed);
+ buffer_put_int(m, forced_command != NULL);
mm_append_debug(m);
- mm_request_send(socket, MONITOR_ANS_KEYALLOWED, m);
+ mm_request_send(sock, MONITOR_ANS_KEYALLOWED, m);
if (type == MM_RSAHOSTKEY)
monitor_permit(mon_dispatch, MONITOR_REQ_RSACHALLENGE, allowed);
monitor_valid_userblob(u_char *data, u_int datalen)
{
Buffer b;
- u_char *p;
+ char *p;
u_int len;
int fail = 0;
fail++;
p = buffer_get_string(&b, NULL);
if (strcmp(authctxt->user, p) != 0) {
- log("wrong user name passed to monitor: expected %s != %.100s",
+ logit("wrong user name passed to monitor: expected %s != %.100s",
authctxt->user, p);
fail++;
}
}
static int
-monitor_valid_hostbasedblob(u_char *data, u_int datalen, u_char *cuser,
- u_char *chost)
+monitor_valid_hostbasedblob(u_char *data, u_int datalen, char *cuser,
+ char *chost)
{
Buffer b;
- u_char *p;
+ char *p;
u_int len;
int fail = 0;
fail++;
p = buffer_get_string(&b, NULL);
if (strcmp(authctxt->user, p) != 0) {
- log("wrong user name passed to monitor: expected %s != %.100s",
+ logit("wrong user name passed to monitor: expected %s != %.100s",
authctxt->user, p);
fail++;
}
}
int
-mm_answer_keyverify(int socket, Buffer *m)
+mm_answer_keyverify(int sock, Buffer *m)
{
Key *key;
u_char *signature, *data, *blob;
verified = key_verify(key, signature, signaturelen, data, datalen);
debug3("%s: key %p signature %s",
- __func__, key, verified ? "verified" : "unverified");
+ __func__, key, (verified == 1) ? "verified" : "unverified");
key_free(key);
xfree(blob);
buffer_clear(m);
buffer_put_int(m, verified);
- mm_request_send(socket, MONITOR_ANS_KEYVERIFY, m);
+ mm_request_send(sock, MONITOR_ANS_KEYVERIFY, m);
- return (verified);
+ return (verified == 1);
}
static void
* the address be 0.0.0.0.
*/
memset(&from, 0, sizeof(from));
+ fromlen = sizeof(from);
if (packet_connection_is_on_socket()) {
- fromlen = sizeof(from);
if (getpeername(packet_get_connection_in(),
- (struct sockaddr *) & from, &fromlen) < 0) {
+ (struct sockaddr *)&from, &fromlen) < 0) {
debug("getpeername: %.100s", strerror(errno));
- fatal_cleanup();
+ cleanup_exit(255);
}
}
/* Record that there was a login on that tty from the remote host. */
record_login(s->pid, s->tty, pw->pw_name, pw->pw_uid,
- get_remote_name_or_ip(utmp_len, options.verify_reverse_mapping),
- (struct sockaddr *)&from);
+ get_remote_name_or_ip(utmp_len, options.use_dns),
+ (struct sockaddr *)&from, fromlen);
}
static void
mm_session_close(Session *s)
{
- debug3("%s: session %d pid %d", __func__, s->self, s->pid);
+ debug3("%s: session %d pid %ld", __func__, s->self, (long)s->pid);
if (s->ttyfd != -1) {
- debug3("%s: tty %s ptyfd %d", __func__, s->tty, s->ptyfd);
- fatal_remove_cleanup(session_pty_cleanup2, (void *)s);
+ debug3("%s: tty %s ptyfd %d", __func__, s->tty, s->ptyfd);
session_pty_cleanup2(s);
}
- s->used = 0;
+ session_unused(s->self);
}
int
-mm_answer_pty(int socket, Buffer *m)
+mm_answer_pty(int sock, Buffer *m)
{
extern struct monitor *pmonitor;
Session *s;
res = pty_allocate(&s->ptyfd, &s->ttyfd, s->tty, sizeof(s->tty));
if (res == 0)
goto error;
- fatal_add_cleanup(session_pty_cleanup2, (void *)s);
pty_setowner(authctxt->pw, s->tty);
buffer_put_int(m, 1);
buffer_put_cstring(m, s->tty);
- mm_request_send(socket, MONITOR_ANS_PTY, m);
-
- mm_send_fd(socket, s->ptyfd);
- mm_send_fd(socket, s->ttyfd);
/* We need to trick ttyslot */
if (dup2(s->ttyfd, 0) == -1)
/* Now we can close the file descriptor again */
close(0);
+ /* send messages generated by record_login */
+ buffer_put_string(m, buffer_ptr(&loginmsg), buffer_len(&loginmsg));
+ buffer_clear(&loginmsg);
+
+ mm_request_send(sock, MONITOR_ANS_PTY, m);
+
+ if (mm_send_fd(sock, s->ptyfd) == -1 ||
+ mm_send_fd(sock, s->ttyfd) == -1)
+ fatal("%s: send fds failed", __func__);
+
/* make sure nothing uses fd 0 */
if ((fd0 = open(_PATH_DEVNULL, O_RDONLY)) < 0)
fatal("%s: open(/dev/null): %s", __func__, strerror(errno));
/* no need to dup() because nobody closes ptyfd */
s->ptymaster = s->ptyfd;
- debug3("%s: tty %s ptyfd %d", __func__, s->tty, s->ttyfd);
+ debug3("%s: tty %s ptyfd %d", __func__, s->tty, s->ttyfd);
return (0);
if (s != NULL)
mm_session_close(s);
buffer_put_int(m, 0);
- mm_request_send(socket, MONITOR_ANS_PTY, m);
+ mm_request_send(sock, MONITOR_ANS_PTY, m);
return (0);
}
int
-mm_answer_pty_cleanup(int socket, Buffer *m)
+mm_answer_pty_cleanup(int sock, Buffer *m)
{
Session *s;
char *tty;
}
int
-mm_answer_sesskey(int socket, Buffer *m)
+mm_answer_sesskey(int sock, Buffer *m)
{
BIGNUM *p;
int rsafail;
/* Turn off permissions */
- monitor_permit(mon_dispatch, MONITOR_REQ_SESSKEY, 1);
+ monitor_permit(mon_dispatch, MONITOR_REQ_SESSKEY, 0);
if ((p = BN_new()) == NULL)
fatal("%s: BN_new", __func__);
BN_clear_free(p);
- mm_request_send(socket, MONITOR_ANS_SESSKEY, m);
+ mm_request_send(sock, MONITOR_ANS_SESSKEY, m);
/* Turn on permissions for sessid passing */
monitor_permit(mon_dispatch, MONITOR_REQ_SESSID, 1);
}
int
-mm_answer_sessid(int socket, Buffer *m)
+mm_answer_sessid(int sock, Buffer *m)
{
int i;
}
int
-mm_answer_rsa_keyallowed(int socket, Buffer *m)
+mm_answer_rsa_keyallowed(int sock, Buffer *m)
{
BIGNUM *client_n;
Key *key = NULL;
debug3("%s entering", __func__);
+ auth_method = "rsa";
if (options.rsa_authentication && authctxt->valid) {
if ((client_n = BN_new()) == NULL)
fatal("%s: BN_new", __func__);
}
buffer_clear(m);
buffer_put_int(m, allowed);
+ buffer_put_int(m, forced_command != NULL);
/* clear temporarily storage (used by generate challenge) */
monitor_reset_key_state();
key_blob = blob;
key_bloblen = blen;
key_blobtype = MM_RSAUSERKEY;
- key_free(key);
}
+ if (key != NULL)
+ key_free(key);
mm_append_debug(m);
- mm_request_send(socket, MONITOR_ANS_RSAKEYALLOWED, m);
+ mm_request_send(sock, MONITOR_ANS_RSAKEYALLOWED, m);
monitor_permit(mon_dispatch, MONITOR_REQ_RSACHALLENGE, allowed);
monitor_permit(mon_dispatch, MONITOR_REQ_RSARESPONSE, 0);
}
int
-mm_answer_rsa_challenge(int socket, Buffer *m)
+mm_answer_rsa_challenge(int sock, Buffer *m)
{
Key *key = NULL;
u_char *blob;
fatal("%s: key type mismatch", __func__);
if ((key = key_from_blob(blob, blen)) == NULL)
fatal("%s: received bad key", __func__);
-
+ if (key->type != KEY_RSA)
+ fatal("%s: received bad key type %d", __func__, key->type);
+ key->type = KEY_RSA1;
if (ssh1_challenge)
BN_clear_free(ssh1_challenge);
ssh1_challenge = auth_rsa_generate_challenge(key);
buffer_put_bignum2(m, ssh1_challenge);
debug3("%s sending reply", __func__);
- mm_request_send(socket, MONITOR_ANS_RSACHALLENGE, m);
+ mm_request_send(sock, MONITOR_ANS_RSACHALLENGE, m);
monitor_permit(mon_dispatch, MONITOR_REQ_RSARESPONSE, 1);
+
+ xfree(blob);
+ key_free(key);
return (0);
}
int
-mm_answer_rsa_response(int socket, Buffer *m)
+mm_answer_rsa_response(int sock, Buffer *m)
{
Key *key = NULL;
u_char *blob, *response;
fatal("%s: received bad response to challenge", __func__);
success = auth_rsa_verify_response(key, ssh1_challenge, response);
+ xfree(blob);
key_free(key);
xfree(response);
buffer_clear(m);
buffer_put_int(m, success);
- mm_request_send(socket, MONITOR_ANS_RSARESPONSE, m);
+ mm_request_send(sock, MONITOR_ANS_RSARESPONSE, m);
return (success);
}
int
-mm_answer_term(int socket, Buffer *req)
+mm_answer_term(int sock, Buffer *req)
{
extern struct monitor *pmonitor;
int res, status;
/* The child is terminating */
session_destroy_all(&mm_session_close);
+#ifdef USE_PAM
+ if (options.use_pam)
+ sshpam_cleanup();
+#endif
+
while (waitpid(pmonitor->m_pid, &status, 0) == -1)
if (errno != EINTR)
exit(1);
res = WIFEXITED(status) ? WEXITSTATUS(status) : 1;
/* Terminate process */
- exit (res);
+ exit(res);
}
+#ifdef SSH_AUDIT_EVENTS
+/* Report that an audit event occurred */
+int
+mm_answer_audit_event(int socket, Buffer *m)
+{
+ ssh_audit_event_t event;
+
+ debug3("%s entering", __func__);
+
+ event = buffer_get_int(m);
+ switch(event) {
+ case SSH_AUTH_FAIL_PUBKEY:
+ case SSH_AUTH_FAIL_HOSTBASED:
+ case SSH_AUTH_FAIL_GSSAPI:
+ case SSH_LOGIN_EXCEED_MAXTRIES:
+ case SSH_LOGIN_ROOT_DENIED:
+ case SSH_CONNECTION_CLOSE:
+ case SSH_INVALID_USER:
+ audit_event(event);
+ break;
+ default:
+ fatal("Audit event type %d not permitted", event);
+ }
+
+ return (0);
+}
+
+int
+mm_answer_audit_command(int socket, Buffer *m)
+{
+ u_int len;
+ char *cmd;
+
+ debug3("%s entering", __func__);
+ cmd = buffer_get_string(m, &len);
+ /* sanity check command, if so how? */
+ audit_run_command(cmd);
+ xfree(cmd);
+ return (0);
+}
+#endif /* SSH_AUDIT_EVENTS */
+
void
monitor_apply_keystate(struct monitor *pmonitor)
{
/* Network I/O buffers */
/* XXX inefficient for large buffers, need: buffer_init_from_string */
- buffer_clear(&input);
- buffer_append(&input, child_state.input, child_state.ilen);
+ buffer_clear(packet_get_input());
+ buffer_append(packet_get_input(), child_state.input, child_state.ilen);
memset(child_state.input, 0, child_state.ilen);
xfree(child_state.input);
- buffer_clear(&output);
- buffer_append(&output, child_state.output, child_state.olen);
+ buffer_clear(packet_get_output());
+ buffer_append(packet_get_output(), child_state.output,
+ child_state.olen);
memset(child_state.output, 0, child_state.olen);
xfree(child_state.output);
+
+ /* Roaming */
+ if (compat20)
+ roam_set_bytes(child_state.sent_bytes, child_state.recv_bytes);
}
static Kex *
void *blob;
u_int bloblen;
- kex = xmalloc(sizeof(*kex));
- memset(kex, 0, sizeof(*kex));
+ kex = xcalloc(1, sizeof(*kex));
kex->session_id = buffer_get_string(m, &kex->session_id_len);
if ((session_id2 == NULL) ||
(kex->session_id_len != session_id2_len) ||
(memcmp(kex->session_id, session_id2, session_id2_len) != 0))
fatal("mm_get_get: internal error: bad session id");
kex->we_need = buffer_get_int(m);
+ kex->kex[KEX_DH_GRP1_SHA1] = kexdh_server;
+ kex->kex[KEX_DH_GRP14_SHA1] = kexdh_server;
+ kex->kex[KEX_DH_GEX_SHA1] = kexgex_server;
+ kex->kex[KEX_DH_GEX_SHA256] = kexgex_server;
+#ifdef GSSAPI
+ if (options.gss_keyex) {
+ kex->kex[KEX_GSS_GRP1_SHA1] = kexgss_server;
+ kex->kex[KEX_GSS_GRP14_SHA1] = kexgss_server;
+ kex->kex[KEX_GSS_GEX_SHA1] = kexgss_server;
+ }
+#endif
kex->server = 1;
kex->hostkey_type = buffer_get_int(m);
kex->kex_type = buffer_get_int(m);
Buffer m;
u_char *blob, *p;
u_int bloblen, plen;
+ u_int32_t seqnr, packets;
+ u_int64_t blocks, bytes;
debug3("%s: Waiting for new keys", __func__);
xfree(blob);
/* Now get sequence numbers for the packets */
- packet_set_seqnr(MODE_OUT, buffer_get_int(&m));
- packet_set_seqnr(MODE_IN, buffer_get_int(&m));
+ seqnr = buffer_get_int(&m);
+ blocks = buffer_get_int64(&m);
+ packets = buffer_get_int(&m);
+ bytes = buffer_get_int64(&m);
+ packet_set_state(MODE_OUT, seqnr, blocks, packets, bytes);
+ seqnr = buffer_get_int(&m);
+ blocks = buffer_get_int64(&m);
+ packets = buffer_get_int(&m);
+ bytes = buffer_get_int64(&m);
+ packet_set_state(MODE_IN, seqnr, blocks, packets, bytes);
skip:
/* Get the key context */
child_state.input = buffer_get_string(&m, &child_state.ilen);
child_state.output = buffer_get_string(&m, &child_state.olen);
+ /* Roaming */
+ if (compat20) {
+ child_state.sent_bytes = buffer_get_int64(&m);
+ child_state.recv_bytes = buffer_get_int64(&m);
+ }
+
buffer_free(&m);
}
void *
mm_zalloc(struct mm_master *mm, u_int ncount, u_int size)
{
- int len = size * ncount;
+ size_t len = (size_t) size * ncount;
void *address;
- if (len <= 0)
+ if (len == 0 || ncount > SIZE_T_MAX / size)
fatal("%s: mm_zalloc(%u, %u)", __func__, ncount, size);
address = mm_malloc(mm, len);
struct monitor *mon;
int pair[2];
- mon = xmalloc(sizeof(*mon));
+ mon = xcalloc(1, sizeof(*mon));
monitor_socketpair(pair);
}
#ifdef GSSAPI
+int
+mm_answer_gss_setup_ctx(int sock, Buffer *m)
+{
+ gss_OID_desc goid;
+ OM_uint32 major;
+ u_int len;
+
+ if (!options.gss_authentication && !options.gss_keyex)
+ fatal("In GSSAPI monitor when GSSAPI is disabled");
+
+ goid.elements = buffer_get_string(m, &len);
+ goid.length = len;
+
+ major = ssh_gssapi_server_ctx(&gsscontext, &goid);
+
+ xfree(goid.elements);
+
+ buffer_clear(m);
+ buffer_put_int(m, major);
+
+ mm_request_send(sock, MONITOR_ANS_GSSSETUP, m);
+
+ /* Now we have a context, enable the step */
+ monitor_permit(mon_dispatch, MONITOR_REQ_GSSSTEP, 1);
+
+ return (0);
+}
int
-mm_answer_gss_setup_ctx(int socket, Buffer *m) {
- gss_OID_desc oid;
- OM_uint32 major;
- int len;
+mm_answer_gss_accept_ctx(int sock, Buffer *m)
+{
+ gss_buffer_desc in;
+ gss_buffer_desc out = GSS_C_EMPTY_BUFFER;
+ OM_uint32 major, minor;
+ OM_uint32 flags = 0; /* GSI needs this */
+ u_int len;
- oid.elements=buffer_get_string(m,&len);
- oid.length=len;
-
- major=ssh_gssapi_server_ctx(&gsscontext,&oid);
+ if (!options.gss_authentication && !options.gss_keyex)
+ fatal("In GSSAPI monitor when GSSAPI is disabled");
- xfree(oid.elements);
+ in.value = buffer_get_string(m, &len);
+ in.length = len;
+ major = ssh_gssapi_accept_ctx(gsscontext, &in, &out, &flags);
+ xfree(in.value);
- buffer_clear(m);
- buffer_put_int(m,major);
+ buffer_clear(m);
+ buffer_put_int(m, major);
+ buffer_put_string(m, out.value, out.length);
+ buffer_put_int(m, flags);
+ mm_request_send(sock, MONITOR_ANS_GSSSTEP, m);
- mm_request_send(socket,MONITOR_ANS_GSSSETUP,m);
+ gss_release_buffer(&minor, &out);
- return(0);
+ if (major == GSS_S_COMPLETE) {
+ monitor_permit(mon_dispatch, MONITOR_REQ_GSSSTEP, 0);
+ monitor_permit(mon_dispatch, MONITOR_REQ_GSSUSEROK, 1);
+ monitor_permit(mon_dispatch, MONITOR_REQ_GSSSIGN, 1);
+ monitor_permit(mon_dispatch, MONITOR_REQ_GSSCHECKMIC, 1);
+ monitor_permit(mon_dispatch, MONITOR_REQ_GSSSIGN, 1);
+ }
+ return (0);
}
int
-mm_answer_gss_accept_ctx(int socket, Buffer *m) {
- gss_buffer_desc in,out;
- OM_uint32 major,minor;
- OM_uint32 flags = 0; /* GSI needs this */
+mm_answer_gss_checkmic(int sock, Buffer *m)
+{
+ gss_buffer_desc gssbuf, mic;
+ OM_uint32 ret;
+ u_int len;
- in.value = buffer_get_string(m,&in.length);
- major=ssh_gssapi_accept_ctx(gsscontext,&in,&out,&flags);
- xfree(in.value);
+ if (!options.gss_authentication && !options.gss_keyex)
+ fatal("In GSSAPI monitor when GSSAPI is disabled");
- buffer_clear(m);
- buffer_put_int(m, major);
- buffer_put_string(m, out.value, out.length);
- buffer_put_int(m, flags);
- mm_request_send(socket,MONITOR_ANS_GSSSTEP,m);
+ gssbuf.value = buffer_get_string(m, &len);
+ gssbuf.length = len;
+ mic.value = buffer_get_string(m, &len);
+ mic.length = len;
- gss_release_buffer(&minor, &out);
+ ret = ssh_gssapi_checkmic(gsscontext, &gssbuf, &mic);
- return(0);
+ xfree(gssbuf.value);
+ xfree(mic.value);
+
+ buffer_clear(m);
+ buffer_put_int(m, ret);
+
+ mm_request_send(sock, MONITOR_ANS_GSSCHECKMIC, m);
+
+ if (!GSS_ERROR(ret))
+ monitor_permit(mon_dispatch, MONITOR_REQ_GSSUSEROK, 1);
+
+ return (0);
}
+
int
-mm_answer_gss_userok(int socket, Buffer *m) {
+mm_answer_gss_userok(int sock, Buffer *m)
+{
int authenticated;
- authenticated = authctxt->valid && ssh_gssapi_userok(authctxt->user);
+ if (!options.gss_authentication && !options.gss_keyex)
+ fatal("In GSSAPI monitor when GSSAPI is disabled");
- buffer_clear(m);
- buffer_put_int(m, authenticated);
+ authenticated = authctxt->valid &&
+ ssh_gssapi_userok(authctxt->user, authctxt->pw);
+
+ buffer_clear(m);
+ buffer_put_int(m, authenticated);
+
+ debug3("%s: sending result %d", __func__, authenticated);
+ mm_request_send(sock, MONITOR_ANS_GSSUSEROK, m);
- debug3("%s: sending result %d", __func__, authenticated);
- mm_request_send(socket, MONITOR_ANS_GSSUSEROK, m);
+ auth_method = "gssapi-with-mic";
- auth_method="gssapi";
+ /* Monitor loop will terminate if authenticated */
+ return (authenticated);
+}
+
+int
+mm_answer_gss_error(int socket, Buffer *m) {
+ OM_uint32 major,minor;
+ char *msg;
+
+ msg=ssh_gssapi_last_error(gsscontext,&major,&minor);
+ buffer_clear(m);
+ buffer_put_int(m,major);
+ buffer_put_int(m,minor);
+ buffer_put_cstring(m,msg);
+
+ mm_request_send(socket,MONITOR_ANS_GSSERR,m);
+
+ xfree(msg);
- /* Monitor loop will terminate if authenticated */
- return(authenticated);
+ return(0);
}
+
+int
+mm_answer_gss_indicate_mechs(int socket, Buffer *m) {
+ OM_uint32 major,minor;
+ gss_OID_set mech_set;
+ size_t i;
+
+ major=gss_indicate_mechs(&minor, &mech_set);
+
+ buffer_clear(m);
+ buffer_put_int(m, major);
+ buffer_put_int(m, mech_set->count);
+ for (i=0; i < mech_set->count; i++) {
+ buffer_put_string(m, mech_set->elements[i].elements,
+ mech_set->elements[i].length);
+ }
+
+#if !defined(MECHGLUE) /* mechglue memory management bug ??? */
+ gss_release_oid_set(&minor,&mech_set);
+#endif
+
+ mm_request_send(socket,MONITOR_ANS_GSSMECHS,m);
+
+ return(0);
+}
+
int
mm_answer_gss_localname(int socket, Buffer *m) {
char *name;
return(0);
}
-int
-mm_answer_gss_sign(int socket, Buffer *m) {
- gss_buffer_desc data,hash;
- OM_uint32 major,minor;
+int
+mm_answer_gss_sign(int socket, Buffer *m)
+{
+ gss_buffer_desc data;
+ gss_buffer_desc hash = GSS_C_EMPTY_BUFFER;
+ OM_uint32 major, minor;
+ u_int len;
- data.value = buffer_get_string(m,&data.length);
- if (data.length != 16) { /* HACK - i.e. we are using SSHv1 */
- if (data.length != 20)
- fatal("%s: data length incorrect: %d", __func__, data.length);
+ if (!options.gss_authentication && !options.gss_keyex)
+ fatal("In GSSAPI monitor when GSSAPI is disabled");
- /* Save the session ID - only first time round */
- if (session_id2_len == 0) {
- session_id2_len=data.length;
- session_id2 = xmalloc(session_id2_len);
- memcpy(session_id2, data.value, session_id2_len);
- }
- } /* HACK - end */
- major=ssh_gssapi_sign(gsscontext, &data, &hash);
+ data.value = buffer_get_string(m, &len);
+ data.length = len;
+ if (data.length != 20)
+ fatal("%s: data length incorrect: %d", __func__,
+ (int) data.length);
- xfree(data.value);
+ /* Save the session ID on the first time around */
+ if (session_id2_len == 0) {
+ session_id2_len = data.length;
+ session_id2 = xmalloc(session_id2_len);
+ memcpy(session_id2, data.value, session_id2_len);
+ }
+ major = ssh_gssapi_sign(gsscontext, &data, &hash);
- buffer_clear(m);
- buffer_put_int(m, major);
- buffer_put_string(m, hash.value, hash.length);
+ xfree(data.value);
- mm_request_send(socket,MONITOR_ANS_GSSSIGN,m);
+ buffer_clear(m);
+ buffer_put_int(m, major);
+ buffer_put_string(m, hash.value, hash.length);
- gss_release_buffer(&minor,&hash);
+ mm_request_send(socket, MONITOR_ANS_GSSSIGN, m);
- /* Turn on permissions for getpwnam */
+ gss_release_buffer(&minor, &hash);
+
+ /* Turn on getpwnam permissions */
monitor_permit(mon_dispatch, MONITOR_REQ_PWNAM, 1);
- return(0);
+ /* And credential updating, for when rekeying */
+ monitor_permit(mon_dispatch, MONITOR_REQ_GSSUPCREDS, 1);
+
+ return (0);
}
int
-mm_answer_gss_indicate_mechs(int socket, Buffer *m) {
- OM_uint32 major,minor;
- gss_OID_set mech_set;
- int i;
+mm_answer_gss_updatecreds(int socket, Buffer *m) {
+ ssh_gssapi_ccache store;
+ int ok;
- major=gss_indicate_mechs(&minor, &mech_set);
+ store.filename = buffer_get_string(m, NULL);
+ store.envvar = buffer_get_string(m, NULL);
+ store.envval = buffer_get_string(m, NULL);
+
+ ok = ssh_gssapi_update_creds(&store);
+
+ xfree(store.filename);
+ xfree(store.envvar);
+ xfree(store.envval);
buffer_clear(m);
- buffer_put_int(m, major);
- buffer_put_int(m, mech_set->count);
- for (i=0; i < mech_set->count; i++) {
- buffer_put_string(m, mech_set->elements[i].elements,
- mech_set->elements[i].length);
- }
+ buffer_put_int(m, ok);
- mm_request_send(socket,MONITOR_ANS_GSSMECHS,m);
+ mm_request_send(socket, MONITOR_ANS_GSSUPCREDS, m);
return(0);
}
+#endif /* GSSAPI */
+
+#ifdef JPAKE
int
-mm_answer_gss_display_status(int socket, Buffer *m) {
- OM_uint32 major,minor,status_value,message_context;
- int status_type;
- gss_OID_desc mech_type_desc;
- gss_OID mech_type;
- gss_buffer_desc status_string;
- u_int length;
-
- status_value = buffer_get_int(m);
- status_type = buffer_get_int(m);
- mech_type_desc.elements = buffer_get_string(m, &length);
- mech_type_desc.length = length;
- if (length != 0) {
- mech_type = &mech_type_desc;
- } else if (gsscontext) {
- mech_type = gsscontext->oid;
- } else {
- mech_type = GSS_C_NO_OID;
- }
- message_context = buffer_get_int(m);
+mm_answer_jpake_step1(int sock, Buffer *m)
+{
+ struct jpake_ctx *pctx;
+ u_char *x3_proof, *x4_proof;
+ u_int x3_proof_len, x4_proof_len;
+
+ if (!options.zero_knowledge_password_authentication)
+ fatal("zero_knowledge_password_authentication disabled");
- major=gss_display_status(&minor, status_value, status_type, mech_type,
- &message_context, &status_string);
+ if (authctxt->jpake_ctx != NULL)
+ fatal("%s: authctxt->jpake_ctx already set (%p)",
+ __func__, authctxt->jpake_ctx);
+ authctxt->jpake_ctx = pctx = jpake_new();
+
+ jpake_step1(pctx->grp,
+ &pctx->server_id, &pctx->server_id_len,
+ &pctx->x3, &pctx->x4, &pctx->g_x3, &pctx->g_x4,
+ &x3_proof, &x3_proof_len,
+ &x4_proof, &x4_proof_len);
+
+ JPAKE_DEBUG_CTX((pctx, "step1 done in %s", __func__));
buffer_clear(m);
- buffer_put_int(m, message_context);
- buffer_put_string(m, status_string.value, status_string.length);
- mm_request_send(socket,MONITOR_ANS_GSSSTAT,m);
+ buffer_put_string(m, pctx->server_id, pctx->server_id_len);
+ buffer_put_bignum2(m, pctx->g_x3);
+ buffer_put_bignum2(m, pctx->g_x4);
+ buffer_put_string(m, x3_proof, x3_proof_len);
+ buffer_put_string(m, x4_proof, x4_proof_len);
- if (mech_type_desc.elements) {
- xfree(mech_type_desc.elements);
- }
+ debug3("%s: sending step1", __func__);
+ mm_request_send(sock, MONITOR_ANS_JPAKE_STEP1, m);
+
+ bzero(x3_proof, x3_proof_len);
+ bzero(x4_proof, x4_proof_len);
+ xfree(x3_proof);
+ xfree(x4_proof);
+
+ monitor_permit(mon_dispatch, MONITOR_REQ_JPAKE_GET_PWDATA, 1);
+ monitor_permit(mon_dispatch, MONITOR_REQ_JPAKE_STEP1, 0);
return 0;
}
-#endif /* GSSAPI */
+int
+mm_answer_jpake_get_pwdata(int sock, Buffer *m)
+{
+ struct jpake_ctx *pctx = authctxt->jpake_ctx;
+ char *hash_scheme, *salt;
-#ifdef GSI
+ if (pctx == NULL)
+ fatal("%s: pctx == NULL", __func__);
+
+ auth2_jpake_get_pwdata(authctxt, &pctx->s, &hash_scheme, &salt);
+
+ buffer_clear(m);
+ /* pctx->s is sensitive, not returned to slave */
+ buffer_put_cstring(m, hash_scheme);
+ buffer_put_cstring(m, salt);
+
+ debug3("%s: sending pwdata", __func__);
+ mm_request_send(sock, MONITOR_ANS_JPAKE_GET_PWDATA, m);
+
+ bzero(hash_scheme, strlen(hash_scheme));
+ bzero(salt, strlen(salt));
+ xfree(hash_scheme);
+ xfree(salt);
+
+ monitor_permit(mon_dispatch, MONITOR_REQ_JPAKE_STEP2, 1);
+
+ return 0;
+}
int
-mm_answer_gsi_gridmap(int socket, Buffer *m) {
- char *subject, *name;
+mm_answer_jpake_step2(int sock, Buffer *m)
+{
+ struct jpake_ctx *pctx = authctxt->jpake_ctx;
+ u_char *x1_proof, *x2_proof, *x4_s_proof;
+ u_int x1_proof_len, x2_proof_len, x4_s_proof_len;
- subject = buffer_get_string(m, NULL);
-
- gsi_gridmap(subject, &name);
+ if (pctx == NULL)
+ fatal("%s: pctx == NULL", __func__);
- buffer_clear(m);
- if (name) {
- buffer_put_cstring(m, name);
- debug3("%s: sending result %s", __func__, name);
- xfree(name);
- } else {
- buffer_put_cstring(m, "");
- debug3("%s: sending result \"\"", __func__);
- }
+ if ((pctx->g_x1 = BN_new()) == NULL ||
+ (pctx->g_x2 = BN_new()) == NULL)
+ fatal("%s: BN_new", __func__);
+ buffer_get_bignum2(m, pctx->g_x1);
+ buffer_get_bignum2(m, pctx->g_x2);
+ pctx->client_id = buffer_get_string(m, &pctx->client_id_len);
+ x1_proof = buffer_get_string(m, &x1_proof_len);
+ x2_proof = buffer_get_string(m, &x2_proof_len);
+
+ jpake_step2(pctx->grp, pctx->s, pctx->g_x3,
+ pctx->g_x1, pctx->g_x2, pctx->x4,
+ pctx->client_id, pctx->client_id_len,
+ pctx->server_id, pctx->server_id_len,
+ x1_proof, x1_proof_len,
+ x2_proof, x2_proof_len,
+ &pctx->b,
+ &x4_s_proof, &x4_s_proof_len);
+
+ JPAKE_DEBUG_CTX((pctx, "step2 done in %s", __func__));
+
+ bzero(x1_proof, x1_proof_len);
+ bzero(x2_proof, x2_proof_len);
+ xfree(x1_proof);
+ xfree(x2_proof);
+
+ buffer_clear(m);
+
+ buffer_put_bignum2(m, pctx->b);
+ buffer_put_string(m, x4_s_proof, x4_s_proof_len);
+
+ debug3("%s: sending step2", __func__);
+ mm_request_send(sock, MONITOR_ANS_JPAKE_STEP2, m);
+
+ bzero(x4_s_proof, x4_s_proof_len);
+ xfree(x4_s_proof);
+
+ monitor_permit(mon_dispatch, MONITOR_REQ_JPAKE_KEY_CONFIRM, 1);
+
+ return 0;
+}
+
+int
+mm_answer_jpake_key_confirm(int sock, Buffer *m)
+{
+ struct jpake_ctx *pctx = authctxt->jpake_ctx;
+ u_char *x2_s_proof;
+ u_int x2_s_proof_len;
+
+ if (pctx == NULL)
+ fatal("%s: pctx == NULL", __func__);
+
+ if ((pctx->a = BN_new()) == NULL)
+ fatal("%s: BN_new", __func__);
+ buffer_get_bignum2(m, pctx->a);
+ x2_s_proof = buffer_get_string(m, &x2_s_proof_len);
+
+ jpake_key_confirm(pctx->grp, pctx->s, pctx->a,
+ pctx->x4, pctx->g_x3, pctx->g_x4, pctx->g_x1, pctx->g_x2,
+ pctx->server_id, pctx->server_id_len,
+ pctx->client_id, pctx->client_id_len,
+ session_id2, session_id2_len,
+ x2_s_proof, x2_s_proof_len,
+ &pctx->k,
+ &pctx->h_k_sid_sessid, &pctx->h_k_sid_sessid_len);
+
+ JPAKE_DEBUG_CTX((pctx, "key_confirm done in %s", __func__));
+
+ bzero(x2_s_proof, x2_s_proof_len);
+ buffer_clear(m);
+
+ /* pctx->k is sensitive, not sent */
+ buffer_put_string(m, pctx->h_k_sid_sessid, pctx->h_k_sid_sessid_len);
+
+ debug3("%s: sending confirmation hash", __func__);
+ mm_request_send(sock, MONITOR_ANS_JPAKE_KEY_CONFIRM, m);
+
+ monitor_permit(mon_dispatch, MONITOR_REQ_JPAKE_CHECK_CONFIRM, 1);
+
+ return 0;
+}
+
+int
+mm_answer_jpake_check_confirm(int sock, Buffer *m)
+{
+ int authenticated = 0;
+ u_char *peer_confirm_hash;
+ u_int peer_confirm_hash_len;
+ struct jpake_ctx *pctx = authctxt->jpake_ctx;
+
+ if (pctx == NULL)
+ fatal("%s: pctx == NULL", __func__);
+
+ peer_confirm_hash = buffer_get_string(m, &peer_confirm_hash_len);
+
+ authenticated = jpake_check_confirm(pctx->k,
+ pctx->client_id, pctx->client_id_len,
+ session_id2, session_id2_len,
+ peer_confirm_hash, peer_confirm_hash_len) && authctxt->valid;
+
+ JPAKE_DEBUG_CTX((pctx, "check_confirm done in %s", __func__));
+
+ bzero(peer_confirm_hash, peer_confirm_hash_len);
+ xfree(peer_confirm_hash);
+
+ buffer_clear(m);
+ buffer_put_int(m, authenticated);
+
+ debug3("%s: sending result %d", __func__, authenticated);
+ mm_request_send(sock, MONITOR_ANS_JPAKE_CHECK_CONFIRM, m);
- mm_request_send(socket, MONITOR_ANS_GSIGRIDMAP, m);
+ monitor_permit(mon_dispatch, MONITOR_REQ_JPAKE_STEP1, 1);
- return(0);
+ auth_method = "jpake-01@openssh.com";
+ return authenticated;
}
-#endif /* GSI */
+#endif /* JPAKE */
andersk / gssapi-openssh.git / blobdiff