/*
* Kerberos v5 authentication and ticket-passing routines.
- *
+ *
* $FreeBSD: src/crypto/openssh/auth-krb5.c,v 1.6 2001/02/13 16:58:04 assar Exp $
- * $OpenBSD: auth-krb5.c,v 1.1 2001/06/26 16:15:23 dugsong Exp $
+ */
+/*
+ * Copyright (c) 2002 Daniel Kouril. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "includes.h"
+RCSID("$OpenBSD: auth-krb5.c,v 1.8 2002/03/19 10:49:35 markus Exp $");
+
#include "ssh.h"
#include "ssh1.h"
#include "packet.h"
Authctxt *authctxt = (Authctxt *)context;
krb5_error_code problem;
static int cleanup_registered = 0;
-
+
if (authctxt->krb5_ctx == NULL) {
problem = krb5_init_context(&authctxt->krb5_ctx);
if (problem)
* only, in auth is received ticket, in client is returned principal
* from the ticket
*/
-int
+int
auth_krb5(Authctxt *authctxt, krb5_data *auth, char **client)
{
krb5_error_code problem;
krb5_principal server;
krb5_data reply;
krb5_ticket *ticket;
- int fd;
-
+ int fd, ret;
+
+ ret = 0;
server = NULL;
ticket = NULL;
reply.length = 0;
-
+
problem = krb5_init(authctxt);
- if (problem)
+ if (problem)
goto err;
-
+
problem = krb5_auth_con_init(authctxt->krb5_ctx,
&authctxt->krb5_auth_ctx);
if (problem)
goto err;
-
+
fd = packet_get_connection_in();
problem = krb5_auth_con_setaddrs_from_fd(authctxt->krb5_ctx,
authctxt->krb5_auth_ctx, &fd);
if (problem)
goto err;
-
+
problem = krb5_sname_to_principal(authctxt->krb5_ctx, NULL, NULL ,
KRB5_NT_SRV_HST, &server);
if (problem)
goto err;
-
+
problem = krb5_rd_req(authctxt->krb5_ctx, &authctxt->krb5_auth_ctx,
auth, server, NULL, NULL, &ticket);
if (problem)
goto err;
-
+
problem = krb5_copy_principal(authctxt->krb5_ctx, ticket->client,
&authctxt->krb5_user);
if (problem)
goto err;
-
+
/* if client wants mutual auth */
problem = krb5_mk_rep(authctxt->krb5_ctx, authctxt->krb5_auth_ctx,
&reply);
if (problem)
goto err;
-
+
/* Check .k5login authorization now. */
if (!krb5_kuserok(authctxt->krb5_ctx, authctxt->krb5_user,
authctxt->pw->pw_name))
goto err;
-
+
if (client)
krb5_unparse_name(authctxt->krb5_ctx, authctxt->krb5_user,
client);
-
+
packet_start(SSH_SMSG_AUTH_KERBEROS_RESPONSE);
packet_put_string((char *) reply.data, reply.length);
packet_send();
packet_write_wait();
-
+
+ ret = 1;
err:
if (server)
krb5_free_principal(authctxt->krb5_ctx, server);
krb5_free_ticket(authctxt->krb5_ctx, ticket);
if (reply.length)
xfree(reply.data);
-
+
if (problem) {
- debug("Kerberos v5 authentication failed: %s",
- krb5_get_err_text(authctxt->krb5_ctx, problem));
- return (0);
+ if (authctxt->krb5_ctx != NULL)
+ debug("Kerberos v5 authentication failed: %s",
+ krb5_get_err_text(authctxt->krb5_ctx, problem));
+ else
+ debug("Kerberos v5 authentication failed: %d",
+ problem);
}
- return (1);
+
+ return (ret);
}
int
krb5_error_code problem;
krb5_ccache ccache = NULL;
char *pname;
-
+
if (authctxt->pw == NULL || authctxt->krb5_user == NULL)
return (0);
-
+
temporarily_use_uid(authctxt->pw);
-
+
problem = krb5_cc_gen_new(authctxt->krb5_ctx, &krb5_fcc_ops, &ccache);
if (problem)
goto fail;
-
+
problem = krb5_cc_initialize(authctxt->krb5_ctx, ccache,
authctxt->krb5_user);
if (problem)
goto fail;
-
+
problem = krb5_rd_cred2(authctxt->krb5_ctx, authctxt->krb5_auth_ctx,
ccache, tgt);
if (problem)
goto fail;
-
+
authctxt->krb5_fwd_ccache = ccache;
ccache = NULL;
-
+
authctxt->krb5_ticket_file = (char *)krb5_cc_get_name(authctxt->krb5_ctx, authctxt->krb5_fwd_ccache);
-
+
problem = krb5_unparse_name(authctxt->krb5_ctx, authctxt->krb5_user,
&pname);
if (problem)
goto fail;
-
+
debug("Kerberos v5 TGT accepted (%s)", pname);
-
+
restore_uid();
-
+
return (1);
-
+
fail:
if (problem)
debug("Kerberos v5 TGT passing failed: %s",
krb5_get_err_text(authctxt->krb5_ctx, problem));
if (ccache)
krb5_cc_destroy(authctxt->krb5_ctx, ccache);
-
+
restore_uid();
-
+
return (0);
}
auth_krb5_password(Authctxt *authctxt, const char *password)
{
krb5_error_code problem;
-
+
if (authctxt->pw == NULL)
return (0);
-
+
temporarily_use_uid(authctxt->pw);
-
+
problem = krb5_init(authctxt);
if (problem)
goto out;
-
+
problem = krb5_parse_name(authctxt->krb5_ctx, authctxt->pw->pw_name,
&authctxt->krb5_user);
if (problem)
goto out;
-
+
problem = krb5_cc_gen_new(authctxt->krb5_ctx, &krb5_mcc_ops,
&authctxt->krb5_fwd_ccache);
if (problem)
goto out;
-
+
problem = krb5_cc_initialize(authctxt->krb5_ctx,
authctxt->krb5_fwd_ccache, authctxt->krb5_user);
if (problem)
goto out;
-
+
+ restore_uid();
problem = krb5_verify_user(authctxt->krb5_ctx, authctxt->krb5_user,
authctxt->krb5_fwd_ccache, password, 1, NULL);
+ temporarily_use_uid(authctxt->pw);
+
if (problem)
goto out;
-
+
authctxt->krb5_ticket_file = (char *)krb5_cc_get_name(authctxt->krb5_ctx, authctxt->krb5_fwd_ccache);
-
+
out:
restore_uid();
-
+
if (problem) {
- debug("Kerberos password authentication failed: %s",
- krb5_get_err_text(authctxt->krb5_ctx, problem));
-
+ if (authctxt->krb5_ctx != NULL)
+ debug("Kerberos password authentication failed: %s",
+ krb5_get_err_text(authctxt->krb5_ctx, problem));
+ else
+ debug("Kerberos password authentication failed: %d",
+ problem);
+
krb5_cleanup_proc(authctxt);
-
+
if (options.kerberos_or_local_passwd)
return (-1);
else
krb5_cleanup_proc(void *context)
{
Authctxt *authctxt = (Authctxt *)context;
-
+
debug("krb5_cleanup_proc called");
if (authctxt->krb5_fwd_ccache) {
krb5_cc_destroy(authctxt->krb5_ctx, authctxt->krb5_fwd_ccache);
andersk / openssh.git / blobdiff