2000-04-29 13:57:08 +00:00
|
|
|
/*
|
|
|
|
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
|
|
|
|
* All rights reserved
|
2000-09-16 02:29:08 +00:00
|
|
|
*
|
|
|
|
* As far as I am concerned, the code I have written for this software
|
|
|
|
* can be used freely for any purpose. Any derived versions of this
|
|
|
|
* software must be clearly marked as such, and if the derived work is
|
|
|
|
* incompatible with the protocol description in the RFC file, it must be
|
|
|
|
* called by a name other than "ssh" or "Secure Shell".
|
2000-04-29 13:57:08 +00:00
|
|
|
*/
|
|
|
|
|
|
|
|
#include "includes.h"
|
2001-03-05 05:56:40 +00:00
|
|
|
RCSID("$OpenBSD: auth1.c,v 1.18 2001/02/22 21:59:43 markus Exp $");
|
2000-10-14 05:23:11 +00:00
|
|
|
|
2000-04-29 13:57:08 +00:00
|
|
|
#include "xmalloc.h"
|
|
|
|
#include "rsa.h"
|
2001-01-22 05:34:40 +00:00
|
|
|
#include "ssh1.h"
|
2000-04-29 13:57:08 +00:00
|
|
|
#include "packet.h"
|
|
|
|
#include "buffer.h"
|
|
|
|
#include "mpaux.h"
|
2001-01-22 05:34:40 +00:00
|
|
|
#include "log.h"
|
2000-04-29 13:57:08 +00:00
|
|
|
#include "servconf.h"
|
|
|
|
#include "compat.h"
|
|
|
|
#include "auth.h"
|
|
|
|
#include "session.h"
|
2001-03-05 05:56:40 +00:00
|
|
|
#include "misc.h"
|
2000-04-29 13:57:08 +00:00
|
|
|
|
|
|
|
/* import */
|
|
|
|
extern ServerOptions options;
|
|
|
|
extern char *forced_command;
|
2000-10-14 05:23:11 +00:00
|
|
|
|
|
|
|
#ifdef WITH_AIXAUTHENTICATE
|
|
|
|
extern char *aixloginmsg;
|
|
|
|
#endif /* WITH_AIXAUTHENTICATE */
|
2000-04-29 13:57:08 +00:00
|
|
|
|
|
|
|
/*
|
|
|
|
* convert ssh auth msg type into description
|
|
|
|
*/
|
|
|
|
char *
|
|
|
|
get_authname(int type)
|
|
|
|
{
|
|
|
|
static char buf[1024];
|
|
|
|
switch (type) {
|
|
|
|
case SSH_CMSG_AUTH_PASSWORD:
|
|
|
|
return "password";
|
|
|
|
case SSH_CMSG_AUTH_RSA:
|
|
|
|
return "rsa";
|
|
|
|
case SSH_CMSG_AUTH_RHOSTS_RSA:
|
|
|
|
return "rhosts-rsa";
|
|
|
|
case SSH_CMSG_AUTH_RHOSTS:
|
|
|
|
return "rhosts";
|
2001-01-19 04:26:52 +00:00
|
|
|
case SSH_CMSG_AUTH_TIS:
|
|
|
|
case SSH_CMSG_AUTH_TIS_RESPONSE:
|
|
|
|
return "challenge-response";
|
2000-04-29 13:57:08 +00:00
|
|
|
#ifdef KRB4
|
|
|
|
case SSH_CMSG_AUTH_KERBEROS:
|
|
|
|
return "kerberos";
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
snprintf(buf, sizeof buf, "bad-auth-msg-%d", type);
|
|
|
|
return buf;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
2001-01-19 04:26:52 +00:00
|
|
|
* read packets, try to authenticate the user and
|
|
|
|
* return only if authentication is successful
|
2000-04-29 13:57:08 +00:00
|
|
|
*/
|
|
|
|
void
|
2001-01-19 04:26:52 +00:00
|
|
|
do_authloop(Authctxt *authctxt)
|
2000-04-29 13:57:08 +00:00
|
|
|
{
|
2000-10-14 05:23:11 +00:00
|
|
|
int authenticated = 0;
|
2000-12-22 01:43:59 +00:00
|
|
|
u_int bits;
|
2000-04-29 13:57:08 +00:00
|
|
|
RSA *client_host_key;
|
|
|
|
BIGNUM *n;
|
2000-10-14 05:23:11 +00:00
|
|
|
char *client_user, *password;
|
2001-01-19 04:26:52 +00:00
|
|
|
char info[1024];
|
2000-12-22 01:43:59 +00:00
|
|
|
u_int dlen;
|
2000-04-29 13:57:08 +00:00
|
|
|
int plen, nlen, elen;
|
2000-12-22 01:43:59 +00:00
|
|
|
u_int ulen;
|
2000-04-29 13:57:08 +00:00
|
|
|
int type = 0;
|
2001-01-19 04:26:52 +00:00
|
|
|
struct passwd *pw = authctxt->pw;
|
|
|
|
|
|
|
|
debug("Attempting authentication for %s%.100s.",
|
|
|
|
authctxt->valid ? "" : "illegal user ", authctxt->user);
|
|
|
|
|
|
|
|
/* If the user has no password, accept authentication immediately. */
|
|
|
|
if (options.password_authentication &&
|
|
|
|
#ifdef KRB4
|
|
|
|
(!options.kerberos_authentication || options.kerberos_or_local_passwd) &&
|
|
|
|
#endif
|
2001-01-19 05:37:32 +00:00
|
|
|
#ifdef USE_PAM
|
2001-02-13 11:26:21 +00:00
|
|
|
auth_pam_password(pw, "")) {
|
2001-02-13 14:25:23 +00:00
|
|
|
#elif defined(HAVE_OSF_SIA)
|
|
|
|
0) {
|
2001-01-19 04:26:52 +00:00
|
|
|
#else
|
2001-02-18 06:01:00 +00:00
|
|
|
auth_password(authctxt, "")) {
|
2001-01-19 04:26:52 +00:00
|
|
|
#endif
|
|
|
|
auth_log(authctxt, 1, "without authentication", "");
|
|
|
|
return;
|
|
|
|
}
|
2000-04-29 13:57:08 +00:00
|
|
|
|
|
|
|
/* Indicate that authentication is needed. */
|
|
|
|
packet_start(SSH_SMSG_FAILURE);
|
|
|
|
packet_send();
|
|
|
|
packet_write_wait();
|
|
|
|
|
2000-10-14 05:23:11 +00:00
|
|
|
client_user = NULL;
|
|
|
|
|
2001-01-19 04:26:52 +00:00
|
|
|
for (;;) {
|
2000-10-14 05:23:11 +00:00
|
|
|
/* default to fail */
|
|
|
|
authenticated = 0;
|
|
|
|
|
2001-01-19 04:26:52 +00:00
|
|
|
info[0] = '\0';
|
2000-04-29 13:57:08 +00:00
|
|
|
|
|
|
|
/* Get a packet from the client. */
|
|
|
|
type = packet_read(&plen);
|
|
|
|
|
|
|
|
/* Process the packet. */
|
|
|
|
switch (type) {
|
|
|
|
#ifdef AFS
|
|
|
|
case SSH_CMSG_HAVE_KERBEROS_TGT:
|
|
|
|
if (!options.kerberos_tgt_passing) {
|
|
|
|
verbose("Kerberos tgt passing disabled.");
|
|
|
|
break;
|
|
|
|
} else {
|
|
|
|
/* Accept Kerberos tgt. */
|
|
|
|
char *tgt = packet_get_string(&dlen);
|
|
|
|
packet_integrity_check(plen, 4 + dlen, type);
|
|
|
|
if (!auth_kerberos_tgt(pw, tgt))
|
2001-01-19 04:26:52 +00:00
|
|
|
verbose("Kerberos tgt REFUSED for %.100s", authctxt->user);
|
2000-04-29 13:57:08 +00:00
|
|
|
xfree(tgt);
|
|
|
|
}
|
|
|
|
continue;
|
|
|
|
|
|
|
|
case SSH_CMSG_HAVE_AFS_TOKEN:
|
|
|
|
if (!options.afs_token_passing || !k_hasafs()) {
|
|
|
|
verbose("AFS token passing disabled.");
|
|
|
|
break;
|
|
|
|
} else {
|
|
|
|
/* Accept AFS token. */
|
|
|
|
char *token_string = packet_get_string(&dlen);
|
|
|
|
packet_integrity_check(plen, 4 + dlen, type);
|
|
|
|
if (!auth_afs_token(pw, token_string))
|
2001-01-19 04:26:52 +00:00
|
|
|
verbose("AFS token REFUSED for %.100s", authctxt->user);
|
2000-04-29 13:57:08 +00:00
|
|
|
xfree(token_string);
|
|
|
|
}
|
|
|
|
continue;
|
|
|
|
#endif /* AFS */
|
|
|
|
#ifdef KRB4
|
|
|
|
case SSH_CMSG_AUTH_KERBEROS:
|
|
|
|
if (!options.kerberos_authentication) {
|
|
|
|
verbose("Kerberos authentication disabled.");
|
|
|
|
break;
|
|
|
|
} else {
|
|
|
|
/* Try Kerberos v4 authentication. */
|
|
|
|
KTEXT_ST auth;
|
|
|
|
char *tkt_user = NULL;
|
2000-12-22 01:43:59 +00:00
|
|
|
char *kdata = packet_get_string((u_int *) &auth.length);
|
2000-04-29 13:57:08 +00:00
|
|
|
packet_integrity_check(plen, 4 + auth.length, type);
|
|
|
|
|
2001-01-19 04:26:52 +00:00
|
|
|
if (authctxt->valid) {
|
|
|
|
if (auth.length < MAX_KTXT_LEN)
|
|
|
|
memcpy(auth.dat, kdata, auth.length);
|
2000-10-14 05:23:11 +00:00
|
|
|
authenticated = auth_krb4(pw->pw_name, &auth, &tkt_user);
|
|
|
|
if (authenticated) {
|
2001-01-19 04:26:52 +00:00
|
|
|
snprintf(info, sizeof info,
|
|
|
|
" tktuser %.100s", tkt_user);
|
2000-10-14 05:23:11 +00:00
|
|
|
xfree(tkt_user);
|
|
|
|
}
|
2000-04-29 13:57:08 +00:00
|
|
|
}
|
2001-01-19 04:26:52 +00:00
|
|
|
xfree(kdata);
|
2000-04-29 13:57:08 +00:00
|
|
|
}
|
|
|
|
break;
|
|
|
|
#endif /* KRB4 */
|
|
|
|
|
|
|
|
case SSH_CMSG_AUTH_RHOSTS:
|
|
|
|
if (!options.rhosts_authentication) {
|
|
|
|
verbose("Rhosts authentication disabled.");
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
/*
|
|
|
|
* Get client user name. Note that we just have to
|
|
|
|
* trust the client; this is one reason why rhosts
|
|
|
|
* authentication is insecure. (Another is
|
|
|
|
* IP-spoofing on a local network.)
|
|
|
|
*/
|
|
|
|
client_user = packet_get_string(&ulen);
|
|
|
|
packet_integrity_check(plen, 4 + ulen, type);
|
|
|
|
|
2000-10-14 05:23:11 +00:00
|
|
|
/* Try to authenticate using /etc/hosts.equiv and .rhosts. */
|
2000-04-29 13:57:08 +00:00
|
|
|
authenticated = auth_rhosts(pw, client_user);
|
|
|
|
|
2001-01-19 04:26:52 +00:00
|
|
|
snprintf(info, sizeof info, " ruser %.100s", client_user);
|
2000-04-29 13:57:08 +00:00
|
|
|
break;
|
|
|
|
|
|
|
|
case SSH_CMSG_AUTH_RHOSTS_RSA:
|
|
|
|
if (!options.rhosts_rsa_authentication) {
|
|
|
|
verbose("Rhosts with RSA authentication disabled.");
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
/*
|
|
|
|
* Get client user name. Note that we just have to
|
|
|
|
* trust the client; root on the client machine can
|
|
|
|
* claim to be any user.
|
|
|
|
*/
|
|
|
|
client_user = packet_get_string(&ulen);
|
|
|
|
|
|
|
|
/* Get the client host key. */
|
|
|
|
client_host_key = RSA_new();
|
|
|
|
if (client_host_key == NULL)
|
|
|
|
fatal("RSA_new failed");
|
|
|
|
client_host_key->e = BN_new();
|
|
|
|
client_host_key->n = BN_new();
|
|
|
|
if (client_host_key->e == NULL || client_host_key->n == NULL)
|
|
|
|
fatal("BN_new failed");
|
|
|
|
bits = packet_get_int();
|
|
|
|
packet_get_bignum(client_host_key->e, &elen);
|
|
|
|
packet_get_bignum(client_host_key->n, &nlen);
|
|
|
|
|
|
|
|
if (bits != BN_num_bits(client_host_key->n))
|
2000-10-14 05:23:11 +00:00
|
|
|
verbose("Warning: keysize mismatch for client_host_key: "
|
2000-04-30 00:00:53 +00:00
|
|
|
"actual %d, announced %d", BN_num_bits(client_host_key->n), bits);
|
2000-04-29 13:57:08 +00:00
|
|
|
packet_integrity_check(plen, (4 + ulen) + 4 + elen + nlen, type);
|
|
|
|
|
|
|
|
authenticated = auth_rhosts_rsa(pw, client_user, client_host_key);
|
|
|
|
RSA_free(client_host_key);
|
|
|
|
|
2001-01-19 04:26:52 +00:00
|
|
|
snprintf(info, sizeof info, " ruser %.100s", client_user);
|
2000-04-29 13:57:08 +00:00
|
|
|
break;
|
|
|
|
|
|
|
|
case SSH_CMSG_AUTH_RSA:
|
|
|
|
if (!options.rsa_authentication) {
|
|
|
|
verbose("RSA authentication disabled.");
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
/* RSA authentication requested. */
|
|
|
|
n = BN_new();
|
|
|
|
packet_get_bignum(n, &nlen);
|
|
|
|
packet_integrity_check(plen, nlen, type);
|
|
|
|
authenticated = auth_rsa(pw, n);
|
|
|
|
BN_clear_free(n);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case SSH_CMSG_AUTH_PASSWORD:
|
|
|
|
if (!options.password_authentication) {
|
|
|
|
verbose("Password authentication disabled.");
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
/*
|
|
|
|
* Read user password. It is in plain text, but was
|
|
|
|
* transmitted over the encrypted channel so it is
|
|
|
|
* not visible to an outside observer.
|
|
|
|
*/
|
|
|
|
password = packet_get_string(&dlen);
|
|
|
|
packet_integrity_check(plen, 4 + dlen, type);
|
|
|
|
|
|
|
|
#ifdef USE_PAM
|
|
|
|
/* Do PAM auth with password */
|
|
|
|
authenticated = auth_pam_password(pw, password);
|
2000-06-28 05:22:41 +00:00
|
|
|
#elif defined(HAVE_OSF_SIA)
|
|
|
|
/* Do SIA auth with password */
|
2001-02-13 14:25:23 +00:00
|
|
|
authenticated = auth_sia_password(authctxt->user,
|
|
|
|
password);
|
2000-06-28 05:22:41 +00:00
|
|
|
#else /* !USE_PAM && !HAVE_OSF_SIA */
|
2001-01-24 21:23:39 +00:00
|
|
|
/* Try authentication with the password. */
|
2001-02-18 06:01:00 +00:00
|
|
|
authenticated = auth_password(authctxt, password);
|
2000-04-29 13:57:08 +00:00
|
|
|
#endif /* USE_PAM */
|
|
|
|
|
|
|
|
memset(password, 0, strlen(password));
|
|
|
|
xfree(password);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case SSH_CMSG_AUTH_TIS:
|
|
|
|
debug("rcvd SSH_CMSG_AUTH_TIS");
|
2001-01-23 03:12:10 +00:00
|
|
|
if (options.challenge_reponse_authentication == 1) {
|
2001-01-19 04:26:52 +00:00
|
|
|
char *challenge = get_challenge(authctxt, authctxt->style);
|
|
|
|
if (challenge != NULL) {
|
|
|
|
debug("sending challenge '%s'", challenge);
|
2000-04-29 13:57:08 +00:00
|
|
|
packet_start(SSH_SMSG_AUTH_TIS_CHALLENGE);
|
2001-01-19 04:26:52 +00:00
|
|
|
packet_put_cstring(challenge);
|
2000-04-29 13:57:08 +00:00
|
|
|
packet_send();
|
|
|
|
packet_write_wait();
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
case SSH_CMSG_AUTH_TIS_RESPONSE:
|
|
|
|
debug("rcvd SSH_CMSG_AUTH_TIS_RESPONSE");
|
2001-01-23 03:12:10 +00:00
|
|
|
if (options.challenge_reponse_authentication == 1) {
|
2000-04-29 13:57:08 +00:00
|
|
|
char *response = packet_get_string(&dlen);
|
2001-01-19 04:26:52 +00:00
|
|
|
debug("got response '%s'", response);
|
2000-04-29 13:57:08 +00:00
|
|
|
packet_integrity_check(plen, 4 + dlen, type);
|
2001-01-19 04:26:52 +00:00
|
|
|
authenticated = verify_response(authctxt, response);
|
|
|
|
memset(response, 'r', dlen);
|
2000-04-29 13:57:08 +00:00
|
|
|
xfree(response);
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
|
|
|
|
default:
|
|
|
|
/*
|
|
|
|
* Any unknown messages will be ignored (and failure
|
|
|
|
* returned) during authentication.
|
|
|
|
*/
|
|
|
|
log("Unknown message during authentication: type %d", type);
|
|
|
|
break;
|
|
|
|
}
|
2001-02-18 06:01:00 +00:00
|
|
|
#ifdef BSD_AUTH
|
|
|
|
if (authctxt->as) {
|
|
|
|
auth_close(authctxt->as);
|
|
|
|
authctxt->as = NULL;
|
|
|
|
}
|
|
|
|
#endif
|
2001-01-19 04:26:52 +00:00
|
|
|
if (!authctxt->valid && authenticated)
|
|
|
|
fatal("INTERNAL ERROR: authenticated invalid user %s",
|
|
|
|
authctxt->user);
|
2000-04-29 13:57:08 +00:00
|
|
|
|
2001-02-05 12:42:17 +00:00
|
|
|
#ifdef HAVE_CYGWIN
|
|
|
|
if (authenticated &&
|
2000-09-16 05:25:12 +00:00
|
|
|
!check_nt_auth(type == SSH_CMSG_AUTH_PASSWORD,pw->pw_uid)) {
|
2000-09-05 05:13:06 +00:00
|
|
|
packet_disconnect("Authentication rejected for uid %d.",
|
2000-10-14 05:23:11 +00:00
|
|
|
(int)pw->pw_uid);
|
2000-09-05 05:13:06 +00:00
|
|
|
authenticated = 0;
|
|
|
|
}
|
2001-01-19 06:10:29 +00:00
|
|
|
#else
|
2001-01-19 04:26:52 +00:00
|
|
|
/* Special handling for root */
|
2001-02-15 03:08:27 +00:00
|
|
|
if (authenticated && authctxt->pw->pw_uid == 0 &&
|
|
|
|
!auth_root_allowed(get_authname(type)))
|
2001-01-19 04:26:52 +00:00
|
|
|
authenticated = 0;
|
2001-01-19 06:10:29 +00:00
|
|
|
#endif
|
2001-02-05 12:42:17 +00:00
|
|
|
#ifdef USE_PAM
|
2000-10-14 05:23:11 +00:00
|
|
|
if (authenticated && !do_pam_account(pw->pw_name, client_user))
|
|
|
|
authenticated = 0;
|
|
|
|
#endif
|
2000-04-29 13:57:08 +00:00
|
|
|
|
2001-01-19 04:26:52 +00:00
|
|
|
/* Log before sending the reply */
|
|
|
|
auth_log(authctxt, authenticated, get_authname(type), info);
|
|
|
|
|
2000-04-29 13:57:08 +00:00
|
|
|
if (client_user != NULL) {
|
|
|
|
xfree(client_user);
|
|
|
|
client_user = NULL;
|
|
|
|
}
|
|
|
|
|
2000-10-14 05:23:11 +00:00
|
|
|
if (authenticated)
|
|
|
|
return;
|
|
|
|
|
2001-01-24 21:23:39 +00:00
|
|
|
if (authctxt->failures++ > AUTH_FAIL_MAX) {
|
2001-02-05 12:42:17 +00:00
|
|
|
#ifdef WITH_AIXAUTHENTICATE
|
|
|
|
loginfailed(authctxt->user,
|
|
|
|
get_canonical_hostname(options.reverse_mapping_check),
|
2001-02-04 12:20:18 +00:00
|
|
|
"ssh");
|
2000-05-17 12:00:02 +00:00
|
|
|
#endif /* WITH_AIXAUTHENTICATE */
|
2001-01-19 04:26:52 +00:00
|
|
|
packet_disconnect(AUTH_FAIL_MSG, authctxt->user);
|
2000-05-17 12:00:02 +00:00
|
|
|
}
|
2000-04-29 13:57:08 +00:00
|
|
|
|
|
|
|
packet_start(SSH_SMSG_FAILURE);
|
|
|
|
packet_send();
|
|
|
|
packet_write_wait();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Performs authentication of an incoming connection. Session key has already
|
|
|
|
* been exchanged and encryption is enabled.
|
|
|
|
*/
|
|
|
|
void
|
|
|
|
do_authentication()
|
|
|
|
{
|
2001-01-19 04:26:52 +00:00
|
|
|
Authctxt *authctxt;
|
|
|
|
struct passwd *pw;
|
2000-04-29 13:57:08 +00:00
|
|
|
int plen;
|
2000-12-22 01:43:59 +00:00
|
|
|
u_int ulen;
|
2001-01-19 04:26:52 +00:00
|
|
|
char *user, *style = NULL;
|
2000-04-29 13:57:08 +00:00
|
|
|
|
|
|
|
/* Get the name of the user that we wish to log in as. */
|
|
|
|
packet_read_expect(&plen, SSH_CMSG_USER);
|
|
|
|
|
|
|
|
/* Get the user name. */
|
|
|
|
user = packet_get_string(&ulen);
|
|
|
|
packet_integrity_check(plen, (4 + ulen), SSH_CMSG_USER);
|
|
|
|
|
2001-01-19 04:26:52 +00:00
|
|
|
if ((style = strchr(user, ':')) != NULL)
|
|
|
|
*style++ = 0;
|
|
|
|
|
|
|
|
authctxt = authctxt_new();
|
|
|
|
authctxt->user = user;
|
|
|
|
authctxt->style = style;
|
|
|
|
|
2000-04-29 13:57:08 +00:00
|
|
|
/* Verify that the user is a valid user. */
|
|
|
|
pw = getpwnam(user);
|
2000-10-14 05:23:11 +00:00
|
|
|
if (pw && allowed_user(pw)) {
|
2001-01-19 04:26:52 +00:00
|
|
|
authctxt->valid = 1;
|
|
|
|
pw = pwcopy(pw);
|
2000-10-14 05:23:11 +00:00
|
|
|
} else {
|
2001-01-19 04:26:52 +00:00
|
|
|
debug("do_authentication: illegal user %s", user);
|
2000-10-14 05:23:11 +00:00
|
|
|
pw = NULL;
|
|
|
|
}
|
2001-01-19 04:26:52 +00:00
|
|
|
authctxt->pw = pw;
|
2000-04-29 13:57:08 +00:00
|
|
|
|
2001-02-15 03:14:11 +00:00
|
|
|
setproctitle("%s", pw ? user : "unknown");
|
|
|
|
|
2000-04-29 13:57:08 +00:00
|
|
|
#ifdef USE_PAM
|
2000-10-14 05:23:11 +00:00
|
|
|
if (pw)
|
2001-01-19 04:46:38 +00:00
|
|
|
start_pam(user);
|
2000-04-29 13:57:08 +00:00
|
|
|
#endif
|
|
|
|
|
|
|
|
/*
|
|
|
|
* If we are not running as root, the user must have the same uid as
|
2000-10-14 05:23:11 +00:00
|
|
|
* the server. (Unless you are running Windows)
|
2000-04-29 13:57:08 +00:00
|
|
|
*/
|
2000-10-14 05:23:11 +00:00
|
|
|
#ifndef HAVE_CYGWIN
|
|
|
|
if (getuid() != 0 && pw && pw->pw_uid != getuid())
|
2000-04-29 13:57:08 +00:00
|
|
|
packet_disconnect("Cannot change user when server not running as root.");
|
2000-09-05 05:13:06 +00:00
|
|
|
#endif
|
2000-04-29 13:57:08 +00:00
|
|
|
|
2001-01-19 04:26:52 +00:00
|
|
|
/*
|
2001-01-24 21:23:39 +00:00
|
|
|
* Loop until the user has been authenticated or the connection is
|
|
|
|
* closed, do_authloop() returns only if authentication is successful
|
|
|
|
*/
|
2001-01-19 04:26:52 +00:00
|
|
|
do_authloop(authctxt);
|
2000-04-29 13:57:08 +00:00
|
|
|
|
|
|
|
/* The user has been authenticated and accepted. */
|
2000-10-14 05:23:11 +00:00
|
|
|
packet_start(SSH_SMSG_SUCCESS);
|
|
|
|
packet_send();
|
|
|
|
packet_write_wait();
|
2001-01-19 04:26:52 +00:00
|
|
|
|
2000-04-29 13:57:08 +00:00
|
|
|
#ifdef WITH_AIXAUTHENTICATE
|
2000-05-17 12:00:02 +00:00
|
|
|
/* We don't have a pty yet, so just label the line as "ssh" */
|
2001-02-05 12:42:17 +00:00
|
|
|
if (loginsuccess(authctxt->user,
|
2001-02-04 12:20:18 +00:00
|
|
|
get_canonical_hostname(options.reverse_mapping_check),
|
|
|
|
"ssh", &aixloginmsg) < 0)
|
2000-05-17 12:00:02 +00:00
|
|
|
aixloginmsg = NULL;
|
2000-04-29 13:57:08 +00:00
|
|
|
#endif /* WITH_AIXAUTHENTICATE */
|
2001-01-19 04:26:52 +00:00
|
|
|
|
|
|
|
xfree(authctxt->user);
|
|
|
|
xfree(authctxt);
|
2000-04-29 13:57:08 +00:00
|
|
|
|
|
|
|
/* Perform session preparation. */
|
|
|
|
do_authenticated(pw);
|
|
|
|
}
|