*/
#include "includes.h"
-RCSID("$OpenBSD: auth1.c,v 1.25 2001/06/26 16:15:23 dugsong Exp $");
+RCSID("$OpenBSD: auth1.c,v 1.35 2002/02/03 17:53:25 markus Exp $");
#include "xmalloc.h"
#include "rsa.h"
#include "servconf.h"
#include "compat.h"
#include "auth.h"
+#include "channels.h"
#include "session.h"
#include "misc.h"
#include "uidswap.h"
{
int authenticated = 0;
u_int bits;
- RSA *client_host_key;
+ Key *client_host_key;
BIGNUM *n;
char *client_user, *password;
char info[1024];
u_int dlen;
- int plen, nlen, elen;
u_int ulen;
int type = 0;
struct passwd *pw = authctxt->pw;
debug("Attempting authentication for %s%.100s.",
- authctxt->valid ? "" : "illegal user ", authctxt->user);
+ authctxt->valid ? "" : "illegal user ", authctxt->user);
/* If the user has no password, accept authentication immediately. */
if (options.password_authentication &&
info[0] = '\0';
/* Get a packet from the client. */
- type = packet_read(&plen);
+ type = packet_read();
/* Process the packet. */
switch (type) {
verbose("Kerberos authentication disabled.");
} else {
char *kdata = packet_get_string(&dlen);
-
- packet_integrity_check(plen, 4 + dlen, type);
-
+ packet_check_eom();
+
if (kdata[0] == 4) { /* KRB_PROT_VERSION */
#ifdef KRB4
KTEXT_ST tkt;
-
+
tkt.length = dlen;
if (tkt.length < MAX_KTXT_LEN)
memcpy(tkt.dat, kdata, tkt.length);
-
+
if (auth_krb4(authctxt, &tkt, &client_user)) {
authenticated = 1;
snprintf(info, sizeof(info),
krb5_data tkt;
tkt.length = dlen;
tkt.data = kdata;
-
+
if (auth_krb5(authctxt, &tkt, &client_user)) {
authenticated = 1;
snprintf(info, sizeof(info),
}
break;
#endif /* KRB4 || KRB5 */
-
+
#if defined(AFS) || defined(KRB5)
/* XXX - punt on backward compatibility here. */
case SSH_CMSG_HAVE_KERBEROS_TGT:
break;
#endif /* AFS */
#endif /* AFS || KRB5 */
-
+
case SSH_CMSG_AUTH_RHOSTS:
if (!options.rhosts_authentication) {
verbose("Rhosts authentication disabled.");
* IP-spoofing on a local network.)
*/
client_user = packet_get_string(&ulen);
- packet_integrity_check(plen, 4 + ulen, type);
+ packet_check_eom();
/* Try to authenticate using /etc/hosts.equiv and .rhosts. */
authenticated = auth_rhosts(pw, client_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");
+ client_host_key = key_new(KEY_RSA1);
bits = packet_get_int();
- packet_get_bignum(client_host_key->e, &elen);
- packet_get_bignum(client_host_key->n, &nlen);
+ packet_get_bignum(client_host_key->rsa->e);
+ packet_get_bignum(client_host_key->rsa->n);
- if (bits != BN_num_bits(client_host_key->n))
+ if (bits != BN_num_bits(client_host_key->rsa->n))
verbose("Warning: keysize mismatch for client_host_key: "
- "actual %d, announced %d", BN_num_bits(client_host_key->n), bits);
- packet_integrity_check(plen, (4 + ulen) + 4 + elen + nlen, type);
+ "actual %d, announced %d",
+ BN_num_bits(client_host_key->rsa->n), bits);
+ packet_check_eom();
- authenticated = auth_rhosts_rsa(pw, client_user, client_host_key);
- RSA_free(client_host_key);
+ authenticated = auth_rhosts_rsa(pw, client_user,
+ client_host_key);
+ key_free(client_host_key);
snprintf(info, sizeof info, " ruser %.100s", client_user);
break;
break;
}
/* RSA authentication requested. */
- n = BN_new();
- packet_get_bignum(n, &nlen);
- packet_integrity_check(plen, nlen, type);
+ if ((n = BN_new()) == NULL)
+ fatal("do_authloop: BN_new failed");
+ packet_get_bignum(n);
+ packet_check_eom();
authenticated = auth_rsa(pw, n);
BN_clear_free(n);
break;
* not visible to an outside observer.
*/
password = packet_get_string(&dlen);
- packet_integrity_check(plen, 4 + dlen, type);
+ packet_check_eom();
#ifdef USE_PAM
/* Do PAM auth with password */
if (options.challenge_response_authentication == 1) {
char *response = packet_get_string(&dlen);
debug("got response '%s'", response);
- packet_integrity_check(plen, 4 + dlen, type);
+ packet_check_eom();
authenticated = verify_response(authctxt, response);
memset(response, 'r', dlen);
xfree(response);
#ifdef HAVE_CYGWIN
if (authenticated &&
- !check_nt_auth(type == SSH_CMSG_AUTH_PASSWORD,pw->pw_uid)) {
+ !check_nt_auth(type == SSH_CMSG_AUTH_PASSWORD, pw)) {
packet_disconnect("Authentication rejected for uid %d.",
- (int)pw->pw_uid);
+ pw == NULL ? -1 : pw->pw_uid);
authenticated = 0;
}
#else
if (authctxt->failures++ > AUTH_FAIL_MAX) {
#ifdef WITH_AIXAUTHENTICATE
loginfailed(authctxt->user,
- get_canonical_hostname(options.reverse_mapping_check),
+ get_canonical_hostname(options.verify_reverse_mapping),
"ssh");
#endif /* WITH_AIXAUTHENTICATE */
packet_disconnect(AUTH_FAIL_MSG, authctxt->user);
* been exchanged and encryption is enabled.
*/
void
-do_authentication()
+do_authentication(void)
{
Authctxt *authctxt;
struct passwd *pw;
- int plen;
u_int ulen;
char *p, *user, *style = NULL;
/* Get the name of the user that we wish to log in as. */
- packet_read_expect(&plen, SSH_CMSG_USER);
+ packet_read_expect(SSH_CMSG_USER);
/* Get the user name. */
user = packet_get_string(&ulen);
- packet_integrity_check(plen, (4 + ulen), SSH_CMSG_USER);
+ packet_check_eom();
if ((style = strchr(user, ':')) != NULL)
*style++ = '\0';
/* XXX - SSH.com Kerberos v5 braindeath. */
if ((p = strchr(user, '@')) != NULL)
*p = '\0';
-
+
authctxt = authctxt_new();
authctxt->user = user;
authctxt->style = style;
setproctitle("%s", pw ? user : "unknown");
#ifdef USE_PAM
- if (pw)
- start_pam(user);
+ start_pam(pw == NULL ? "NOUSER" : user);
#endif
/*
andersk / gssapi-openssh.git / blobdiff