*/
#include "includes.h"
-RCSID("$OpenBSD: monitor.c,v 1.18 2002/06/26 13:20:57 deraadt Exp $");
+RCSID("$OpenBSD: monitor.c,v 1.36 2003/04/01 10:22:21 markus Exp $");
#include <openssl/dh.h>
int mm_answer_pam_start(int, Buffer *);
#endif
+#ifdef KRB4
+int mm_answer_krb4(int, Buffer *);
+#endif
+#ifdef KRB5
+int mm_answer_krb5(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_sign(int, Buffer *);
+int mm_answer_gss_error(int, Buffer *);
+int mm_answer_gss_indicate_mechs(int, Buffer *);
+int mm_answer_gss_localname(int, Buffer *);
#endif
#ifdef GSI
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_char *session_id2 = NULL;
{MONITOR_REQ_GSSSETUP, MON_ISAUTH, mm_answer_gss_setup_ctx},
{MONITOR_REQ_GSSSTEP, MON_ISAUTH, mm_answer_gss_accept_ctx},
{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_AUTH, mm_answer_gss_localname},
+ {MONITOR_REQ_GSSLOCALNAME, MON_ISAUTH, mm_answer_gss_localname},
#endif
{MONITOR_REQ_KEYALLOWED, MON_ISAUTH, mm_answer_keyallowed},
{MONITOR_REQ_KEYVERIFY, MON_AUTH, mm_answer_keyverify},
{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},
#endif
{MONITOR_REQ_MODULI, 0, mm_answer_moduli},
{MONITOR_REQ_SIGN, 0, mm_answer_sign},
{MONITOR_REQ_GSSSTEP, MON_ISAUTH, mm_answer_gss_accept_ctx},
{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},
#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},
#endif
{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_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},
#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);
#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_GSSERR, 1);
#endif
#ifdef GSI
monitor_permit(mon_dispatch, MONITOR_REQ_GSIGRIDMAP, 1);
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_GSSERR, 1);
+#endif
if (!no_pty_flag) {
monitor_permit(mon_dispatch, MONITOR_REQ_PTY, 1);
monitor_permit(mon_dispatch, MONITOR_REQ_PTYCLEANUP, 1);
p = buffer_get_string(m, &datlen);
if (datlen != 20)
- fatal("%s: data length incorrect: %d", __func__, datlen);
+ 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);
mm_request_send(socket, MONITOR_ANS_AUTH2_READ_BANNER, m);
if (banner != NULL)
- free(banner);
+ xfree(banner);
return (0);
}
{
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 */
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);
+ debug3("%s: sending challenge success: %u", __func__, success);
mm_request_send(socket, MONITOR_ANS_BSDAUTHQUERY, m);
- if (res != -1) {
+ if (success) {
xfree(name);
xfree(infotxt);
xfree(prompts);
{
struct skey skey;
char challenge[1024];
- int res;
+ u_int success;
- res = skeychallenge(&skey, authctxt->user, challenge);
+ success = skeychallenge(&skey, authctxt->user, 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);
+ debug3("%s: sending challenge success: %u", __func__, success);
mm_request_send(socket, MONITOR_ANS_SKEYQUERY, m);
return (0);
mm_answer_keyallowed(int socket, 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;
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();
buffer_clear(m);
buffer_put_int(m, allowed);
+ buffer_put_int(m, forced_command != NULL);
mm_append_debug(m);
monitor_valid_userblob(u_char *data, u_int datalen)
{
Buffer b;
- u_char *p;
+ char *p;
u_int len;
int fail = 0;
}
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;
* 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) {
debug("getpeername: %.100s", strerror(errno));
/* 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);
+ (struct sockaddr *)&from, fromlen);
}
static void
}
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_RSACHALLENGE, m);
monitor_permit(mon_dispatch, MONITOR_REQ_RSARESPONSE, 1);
+
+ xfree(blob);
+ key_free(key);
return (0);
}
fatal("%s: received bad response to challenge", __func__);
success = auth_rsa_verify_response(key, ssh1_challenge, response);
+ xfree(blob);
key_free(key);
xfree(response);
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)
{
(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_GEX_SHA1] = kexgex_server;
+#ifdef GSSAPI
+ kex->kex[KEX_GSS_GRP1_SHA1] =kexgss_server;
+#endif
kex->server = 1;
kex->hostkey_type = buffer_get_int(m);
kex->kex_type = buffer_get_int(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);
mm_request_send(socket,MONITOR_ANS_GSSSETUP,m);
+ /* Now we have a context, enable the step and sign */
+ monitor_permit(mon_dispatch, MONITOR_REQ_GSSSTEP,1);
+
return(0);
}
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);
+ }
return(0);
}
+
int
mm_answer_gss_userok(int socket, Buffer *m) {
int authenticated;
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);
}
-int
-mm_answer_gss_localname(int socket, Buffer *m) {
- char *name;
-
- ssh_gssapi_localname(&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_GSSLOCALNAME, m);
-
- return(0);
-}
int
mm_answer_gss_sign(int socket, Buffer *m) {
return(0);
}
+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);
+
+ return(0);
+}
+
+int
+mm_answer_gss_indicate_mechs(int socket, Buffer *m) {
+ OM_uint32 major,minor;
+ gss_OID_set mech_set;
+ int 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;
+
+ ssh_gssapi_localname(&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_GSSLOCALNAME, m);
+
+ return(0);
+}
#endif /* GSSAPI */
#ifdef GSI
andersk / gssapi-openssh.git / blobdiff