]> andersk Git - gssapi-openssh.git/blobdiff - openssh/monitor.c
Initial revision
[gssapi-openssh.git] / openssh / monitor.c
index 25fbd748629a35a6214bd90f4ab16c0ea895a933..494c4303a7e67c2f448f876bbeaee3f36f419cad 100644 (file)
@@ -25,7 +25,7 @@
  */
 
 #include "includes.h"
-RCSID("$OpenBSD: monitor.c,v 1.36 2003/04/01 10:22:21 markus Exp $");
+RCSID("$OpenBSD: monitor.c,v 1.55 2004/02/05 05:37:17 dtucker Exp $");
 
 #include <openssl/dh.h>
 
@@ -37,7 +37,13 @@ RCSID("$OpenBSD: monitor.c,v 1.36 2003/04/01 10:22:21 markus Exp $");
 #include "auth.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"
@@ -98,7 +104,7 @@ struct {
        u_int olen;
 } 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 *);
@@ -123,13 +129,18 @@ int mm_answer_sessid(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 KRB4
-int mm_answer_krb4(int, Buffer *);
-#endif
-#ifdef KRB5
-int mm_answer_krb5(int, Buffer *);
+#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_checkmic(int, Buffer *);
 #endif
 
 #ifdef GSSAPI
@@ -142,10 +153,6 @@ int mm_answer_gss_indicate_mechs(int, Buffer *);
 int mm_answer_gss_localname(int, Buffer *);
 #endif
 
-#ifdef GSI
-int mm_answer_gsi_gridmap(int, Buffer *);
-#endif
-
 static Authctxt *authctxt;
 static BIGNUM *ssh1_challenge = NULL;  /* used for ssh1 rsa auth */
 
@@ -156,8 +163,9 @@ static int key_blobtype = MM_NOKEY;
 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;
@@ -182,6 +190,11 @@ struct mon_table mon_dispatch_proto20[] = {
     {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 BSD_AUTH
     {MONITOR_REQ_BSDAUTHQUERY, MON_ISAUTH, mm_answer_bsdauthquery},
@@ -191,17 +204,18 @@ struct mon_table mon_dispatch_proto20[] = {
     {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_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_GSSUSEROK, MON_AUTH, mm_answer_gss_userok},
     {MONITOR_REQ_GSSLOCALNAME, MON_ISAUTH, mm_answer_gss_localname},
+    {MONITOR_REQ_GSSCHECKMIC, MON_ISAUTH, mm_answer_gss_checkmic},
 #endif
-    {MONITOR_REQ_KEYALLOWED, MON_ISAUTH, mm_answer_keyallowed},
-    {MONITOR_REQ_KEYVERIFY, MON_AUTH, mm_answer_keyverify},
     {0, 0, NULL}
 };
 
@@ -245,28 +259,18 @@ struct mon_table mon_dispatch_proto15[] = {
     {MONITOR_REQ_GSSUSEROK, MON_AUTH, mm_answer_gss_userok},
     {MONITOR_REQ_GSSMECHS, MON_ISAUTH, mm_answer_gss_indicate_mechs},
 #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},
-#endif
-#ifdef KRB4
-    {MONITOR_REQ_KRB4, MON_ONCE|MON_AUTH, mm_answer_krb4},
-#endif
-#ifdef KRB5
-    {MONITOR_REQ_KRB5, MON_ONCE|MON_AUTH, mm_answer_krb5},
+    {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
     {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},
-#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},
@@ -304,14 +308,17 @@ monitor_permit_authentications(int permit)
        }
 }
 
-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));
+
        if (compat20) {
                mon_dispatch = mon_dispatch_proto20;
 
@@ -328,17 +335,8 @@ monitor_child_preauth(struct monitor *pmonitor)
                mon_dispatch = mon_dispatch_proto15;
 
                monitor_permit(mon_dispatch, MONITOR_REQ_SESSKEY, 1);
-#ifdef GSSAPI          
-               monitor_permit(mon_dispatch, MONITOR_REQ_GSSMECHS, 1);
-               monitor_permit(mon_dispatch, MONITOR_REQ_GSSERR, 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);
@@ -350,8 +348,16 @@ monitor_child_preauth(struct monitor *pmonitor)
                            !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
                }
 
@@ -370,13 +376,27 @@ monitor_child_preauth(struct monitor *pmonitor)
            __func__, authctxt->user);
 
        mm_get_keystate(pmonitor);
+}
 
-       return (authctxt);
+static void
+monitor_set_child_handler(pid_t pid)
+{
+       monitor_child_pid = pid;
+}
+
+static void
+monitor_child_handler(int signal)
+{
+       kill(monitor_child_pid, signal);
 }
 
 void
 monitor_child_postauth(struct monitor *pmonitor)
 {
+       monitor_set_child_handler(pmonitor->m_pid);
+       signal(SIGHUP, &monitor_child_handler);
+       signal(SIGTERM, &monitor_child_handler);
+
        if (compat20) {
                mon_dispatch = mon_dispatch_postauth20;
 
@@ -596,6 +616,7 @@ mm_answer_pwnamallow(int socket, Buffer *m)
 
        if (pwent == NULL) {
                buffer_put_char(m, 0);
+               authctxt->pw = fakepw();
                goto out;
        }
 
@@ -628,7 +649,8 @@ mm_answer_pwnamallow(int socket, Buffer *m)
        }
 
 #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);
@@ -678,7 +700,7 @@ mm_answer_authpassword(int socket, Buffer *m)
        passwd = buffer_get_string(m, &plen);
        /* Only authenticate if the context is valid */
        authenticated = options.password_authentication &&
-           auth_password(authctxt, passwd) && authctxt->valid;
+           auth_password(authctxt, passwd);
        memset(passwd, 0, strlen(passwd));
        xfree(passwd);
 
@@ -765,7 +787,8 @@ mm_answer_skeyquery(int socket, Buffer *m)
        char challenge[1024];
        u_int success;
 
-       success = skeychallenge(&skey, authctxt->user, challenge) < 0 ? 0 : 1;
+       success = _compat_skeychallenge(&skey, authctxt->user, challenge,
+           sizeof(challenge)) < 0 ? 0 : 1;
 
        buffer_clear(m);
        buffer_put_int(m, success);
@@ -809,16 +832,129 @@ mm_answer_skeyrespond(int socket, Buffer *m)
 int
 mm_answer_pam_start(int socket, 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 socket, 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);
+
+       mm_request_send(socket, MONITOR_ANS_PAM_ACCOUNT, m);
+
+       return (ret);
+}
+
+static void *sshpam_ctxt, *sshpam_authok;
+extern KbdintDevice sshpam_device;
+
+int
+mm_answer_pam_init_ctx(int socket, 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(socket, MONITOR_ANS_PAM_INIT_CTX, m);
+       return (0);
+}
+
+int
+mm_answer_pam_query(int socket, Buffer *m)
+{
+       char *name, *info, **prompts;
+       u_int num, *echo_on;
+       int i, ret;
 
-       start_pam(user);
+       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);
+       mm_request_send(socket, MONITOR_ANS_PAM_QUERY, m);
+       return (0);
+}
 
-       xfree(user);
+int
+mm_answer_pam_respond(int socket, Buffer *m)
+{
+       char **resp;
+       u_int num;
+       int i, ret;
 
+       debug3("%s", __func__);
+       sshpam_authok = NULL;
+       num = buffer_get_int(m);
+       if (num > 0) {
+               resp = xmalloc(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(socket, 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 socket, Buffer *m)
+{
+
+       debug3("%s", __func__);
+       (sshpam_device.free_ctx)(sshpam_ctxt);
+       buffer_clear(m);
+       mm_request_send(socket, MONITOR_ANS_PAM_FREE_CTX, m);
+       return (sshpam_authok == sshpam_ctxt);
+}
 #endif
 
 static void
@@ -857,7 +993,7 @@ mm_answer_keyallowed(int socket, Buffer *m)
 
        debug3("%s: key_from_blob: %p", __func__, key);
 
-       if (key != NULL && authctxt->pw != NULL) {
+       if (key != NULL && authctxt->valid) {
                switch(type) {
                case MM_USERKEY:
                        allowed = options.pubkey_authentication &&
@@ -942,7 +1078,7 @@ monitor_valid_userblob(u_char *data, u_int datalen)
                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++;
        }
@@ -990,7 +1126,7 @@ monitor_valid_hostbasedblob(u_char *data, u_int datalen, char *cuser,
                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++;
        }
@@ -1095,22 +1231,21 @@ mm_record_login(Session *s, struct passwd *pw)
                if (getpeername(packet_get_connection_in(),
                        (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),
+           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);
                session_pty_cleanup2(s);
        }
        s->used = 0;
@@ -1135,7 +1270,6 @@ mm_answer_pty(int socket, Buffer *m)
        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);
@@ -1371,89 +1505,6 @@ mm_answer_rsa_response(int socket, Buffer *m)
        return (success);
 }
 
-#ifdef KRB4
-int
-mm_answer_krb4(int socket, Buffer *m)
-{
-       KTEXT_ST auth, reply;
-       char  *client, *p;
-       int success;
-       u_int alen;
-
-       reply.length = auth.length = 0;
-       p = buffer_get_string(m, &alen);
-       if (alen >=  MAX_KTXT_LEN)
-                fatal("%s: auth too large", __func__);
-       memcpy(auth.dat, p, alen);
-       auth.length = alen;
-       memset(p, 0, alen);
-       xfree(p);
-
-       success = options.kerberos_authentication &&
-           authctxt->valid &&
-           auth_krb4(authctxt, &auth, &client, &reply);
-
-       memset(auth.dat, 0, alen);
-       buffer_clear(m);
-       buffer_put_int(m, success);
-
-       if (success) {
-               buffer_put_cstring(m, client);
-               buffer_put_string(m, reply.dat, reply.length);
-               if (client)
-                       xfree(client);
-               if (reply.length)
-                       memset(reply.dat, 0, reply.length);
-       }
-
-       debug3("%s: sending result %d", __func__, success);
-       mm_request_send(socket, MONITOR_ANS_KRB4, m);
-
-       auth_method = "kerberos";
-
-       /* Causes monitor loop to terminate if authenticated */
-       return (success);
-}
-#endif
-
-#ifdef KRB5
-int
-mm_answer_krb5(int socket, Buffer *m)
-{
-       krb5_data tkt, reply;
-       char *client_user;
-       u_int len;
-       int success;
-
-       /* use temporary var to avoid size issues on 64bit arch */
-       tkt.data = buffer_get_string(m, &len);
-       tkt.length = len;
-
-       success = options.kerberos_authentication &&
-           authctxt->valid &&
-           auth_krb5(authctxt, &tkt, &client_user, &reply);
-
-       if (tkt.length)
-               xfree(tkt.data);
-
-       buffer_clear(m);
-       buffer_put_int(m, success);
-
-       if (success) {
-               buffer_put_cstring(m, client_user);
-               buffer_put_string(m, reply.data, reply.length);
-               if (client_user)
-                       xfree(client_user);
-               if (reply.length)
-                       xfree(reply.data);
-       }
-       mm_request_send(socket, MONITOR_ANS_KRB5, m);
-
-       return success;
-}
-#endif
-
 int
 mm_answer_term(int socket, Buffer *req)
 {
@@ -1541,7 +1592,7 @@ mm_get_kex(Buffer *m)
        kex->kex[KEX_DH_GRP1_SHA1] = kexdh_server;
        kex->kex[KEX_DH_GEX_SHA1] = kexgex_server;
 #ifdef GSSAPI
-       kex->kex[KEX_GSS_GRP1_SHA1] =kexgss_server;
+       kex->kex[KEX_GSS_GRP1_SHA1] = kexgss_server;
 #endif
        kex->server = 1;
        kex->hostkey_type = buffer_get_int(m);
@@ -1572,6 +1623,8 @@ mm_get_keystate(struct monitor *pmonitor)
        Buffer m;
        u_char *blob, *p;
        u_int bloblen, plen;
+       u_int32_t seqnr, packets;
+       u_int64_t blocks;
 
        debug3("%s: Waiting for new keys", __func__);
 
@@ -1601,8 +1654,14 @@ mm_get_keystate(struct monitor *pmonitor)
        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);
+       packet_set_state(MODE_OUT, seqnr, blocks, packets);
+       seqnr = buffer_get_int(&m);
+       blocks = buffer_get_int64(&m);
+       packets = buffer_get_int(&m);
+       packet_set_state(MODE_IN, seqnr, blocks, packets);
 
  skip:
        /* Get the key context */
@@ -1696,6 +1755,7 @@ monitor_init(void)
 
        mon = xmalloc(sizeof(*mon));
 
+       mon->m_pid = 0;
        monitor_socketpair(pair);
 
        mon->m_recvfd = pair[0];
@@ -1725,85 +1785,120 @@ monitor_reinit(struct monitor *mon)
 }
 
 #ifdef GSSAPI
-
 int
-mm_answer_gss_setup_ctx(int socket, Buffer *m) {
-        gss_OID_desc oid;
-        OM_uint32 major;
-        u_int len;
+mm_answer_gss_setup_ctx(int socket, Buffer *m)
+{
+       gss_OID_desc oid;
+       OM_uint32 major;
+       u_int len;
 
-        oid.elements=buffer_get_string(m,&len);
-       oid.length=len;
-                
-        major=ssh_gssapi_server_ctx(&gsscontext,&oid);
+       oid.elements = buffer_get_string(m, &len);
+       oid.length = len;
 
-        xfree(oid.elements);
+       major = ssh_gssapi_server_ctx(&gsscontext, &oid);
 
-        buffer_clear(m);
-        buffer_put_int(m,major);
+       xfree(oid.elements);
 
-        mm_request_send(socket,MONITOR_ANS_GSSSETUP,m);
+       buffer_clear(m);
+       buffer_put_int(m, major);
 
-       /* Now we have a context, enable the step and sign */
-       monitor_permit(mon_dispatch, MONITOR_REQ_GSSSTEP,1);
+       mm_request_send(socket,MONITOR_ANS_GSSSETUP, m);
 
-        return(0);
+       /* Now we have a context, enable the step */
+       monitor_permit(mon_dispatch, MONITOR_REQ_GSSSTEP, 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_accept_ctx(int socket, 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;
 
-        in.value = buffer_get_string(m,&in.length);
-        major=ssh_gssapi_accept_ctx(gsscontext,&in,&out,&flags);
-        xfree(in.value);
+       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_put_string(m, out.value, out.length);
-        buffer_put_int(m, flags);
-        mm_request_send(socket,MONITOR_ANS_GSSSTEP,m);
+       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);
 
-        gss_release_buffer(&minor, &out);
+       gss_release_buffer(&minor, &out);
 
-       /* Complete - now we can do signing */
        if (major==GSS_S_COMPLETE) {
-               monitor_permit(mon_dispatch, MONITOR_REQ_GSSSTEP,0);
-               monitor_permit(mon_dispatch, MONITOR_REQ_GSSSIGN,1);            
+               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);
        }
-        return(0);
+       return (0);
 }
 
 int
-mm_answer_gss_userok(int socket, Buffer *m) {
+mm_answer_gss_checkmic(int socket, Buffer *m)
+{
+       gss_buffer_desc gssbuf, mic;
+       OM_uint32 ret;
+       u_int len;
+
+       gssbuf.value = buffer_get_string(m, &len);
+       gssbuf.length = len;
+       mic.value = buffer_get_string(m, &len);
+       mic.length = len;
+
+       ret = ssh_gssapi_checkmic(gsscontext, &gssbuf, &mic);
+
+       xfree(gssbuf.value);
+       xfree(mic.value);
+
+       buffer_clear(m);
+       buffer_put_int(m, ret);
+
+       mm_request_send(socket, 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)
+{
        int authenticated;
 
-        authenticated = authctxt->valid && ssh_gssapi_userok(authctxt->user);
+       authenticated = authctxt->valid && ssh_gssapi_userok(authctxt->user);
 
-        buffer_clear(m);
-        buffer_put_int(m, authenticated);
+       buffer_clear(m);
+       buffer_put_int(m, authenticated);
 
-        debug3("%s: sending result %d", __func__, authenticated);
-        mm_request_send(socket, MONITOR_ANS_GSSUSEROK, m);
+       debug3("%s: sending result %d", __func__, authenticated);
+       mm_request_send(socket, MONITOR_ANS_GSSUSEROK, m);
 
-       /* XXX - auth method could also be 'external' */
-       auth_method="gssapi";
-       
-        /* Monitor loop will terminate if authenticated */
-        return(authenticated);
+       auth_method="gssapi-with-mic";
+
+       /* Monitor loop will terminate if authenticated */
+       return (authenticated);
 }
 
 int
 mm_answer_gss_sign(int socket, Buffer *m) {
         gss_buffer_desc data,hash;
         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 */
+        data.value = buffer_get_string(m, &len);
+       data.length = len;
         if (data.length != 20)
-                fatal("%s: data length incorrect: %d", __func__, data.length);
+               fatal("%s: data length incorrect: %d", __func__,
+                     (int)data.length);
 
         /* Save the session ID - only first time round */
         if (session_id2_len == 0) {
@@ -1811,7 +1906,6 @@ mm_answer_gss_sign(int socket, Buffer *m) {
                 session_id2 = xmalloc(session_id2_len);
                 memcpy(session_id2, data.value, session_id2_len);
         }
-        } /* HACK - end */
         major=ssh_gssapi_sign(gsscontext, &data, &hash);
 
         xfree(data.value);
@@ -1894,30 +1988,3 @@ mm_answer_gss_localname(int socket, Buffer *m) {
         return(0);
 }
 #endif /* GSSAPI */
-
-#ifdef GSI
-
-int
-mm_answer_gsi_gridmap(int socket, Buffer *m) {
-    char *subject, *name;
-
-    subject = buffer_get_string(m, NULL);
-    
-    gsi_gridmap(subject, &name);
-
-    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__);
-    }
-
-    mm_request_send(socket, MONITOR_ANS_GSIGRIDMAP, m);
-
-    return(0);
-}
-
-#endif /* GSI */
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