+++ /dev/null
-/* $OpenBSD: gss-serv-krb5.c,v 1.7 2006/08/03 03:34:42 deraadt Exp $ */
-
-/*
- * Copyright (c) 2001-2003 Simon Wilkinson. 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"
-
-#ifdef GSSAPI
-#ifdef KRB5
-
-#include <sys/types.h>
-
-#include <stdarg.h>
-#include <string.h>
-
-#include "xmalloc.h"
-#include "key.h"
-#include "hostfile.h"
-#include "auth.h"
-#include "log.h"
-#include "servconf.h"
-
-#include "buffer.h"
-#include "ssh-gss.h"
-
-extern ServerOptions options;
-
-#ifdef HEIMDAL
-# include <krb5.h>
-#else
-# ifdef HAVE_GSSAPI_KRB5_H
-# include <gssapi_krb5.h>
-# elif HAVE_GSSAPI_GSSAPI_KRB5_H
-# include <gssapi/gssapi_krb5.h>
-# endif
-#endif
-
-static krb5_context krb_context = NULL;
-
-/* Initialise the krb5 library, for the stuff that GSSAPI won't do */
-
-static int
-ssh_gssapi_krb5_init(void)
-{
- krb5_error_code problem;
-
- if (krb_context != NULL)
- return 1;
-
- problem = krb5_init_context(&krb_context);
- if (problem) {
- logit("Cannot initialize krb5 context");
- return 0;
- }
-
- return 1;
-}
-
-/* Check if this user is OK to login. This only works with krb5 - other
- * GSSAPI mechanisms will need their own.
- * Returns true if the user is OK to log in, otherwise returns 0
- */
-
-static int
-ssh_gssapi_krb5_userok(ssh_gssapi_client *client, char *name)
-{
- krb5_principal princ;
- int retval;
-
- if (ssh_gssapi_krb5_init() == 0)
- return 0;
-
- if ((retval = krb5_parse_name(krb_context, client->exportedname.value,
- &princ))) {
- logit("krb5_parse_name(): %.100s",
- krb5_get_err_text(krb_context, retval));
- return 0;
- }
- if (krb5_kuserok(krb_context, princ, name)) {
- retval = 1;
- logit("Authorized to %s, krb5 principal %s (krb5_kuserok)",
- name, (char *)client->displayname.value);
- } else
- retval = 0;
-
- krb5_free_principal(krb_context, princ);
- return retval;
-}
-
-
-/* This writes out any forwarded credentials from the structure populated
- * during userauth. Called after we have setuid to the user */
-
-static void
-ssh_gssapi_krb5_storecreds(ssh_gssapi_client *client)
-{
- krb5_ccache ccache;
- krb5_error_code problem;
- krb5_principal princ;
- OM_uint32 maj_status, min_status;
- int len;
-
- if (client->creds == NULL) {
- debug("No credentials stored");
- return;
- }
-
- if (ssh_gssapi_krb5_init() == 0)
- return;
-
-#ifdef HEIMDAL
- if ((problem = krb5_cc_gen_new(krb_context, &krb5_fcc_ops, &ccache))) {
- logit("krb5_cc_gen_new(): %.100s",
- krb5_get_err_text(krb_context, problem));
- return;
- }
-#else
- if ((problem = ssh_krb5_cc_gen(krb_context, &ccache))) {
- logit("ssh_krb5_cc_gen(): %.100s",
- krb5_get_err_text(krb_context, problem));
- return;
- }
-#endif /* #ifdef HEIMDAL */
-
- if ((problem = krb5_parse_name(krb_context,
- client->exportedname.value, &princ))) {
- logit("krb5_parse_name(): %.100s",
- krb5_get_err_text(krb_context, problem));
- krb5_cc_destroy(krb_context, ccache);
- return;
- }
-
- if ((problem = krb5_cc_initialize(krb_context, ccache, princ))) {
- logit("krb5_cc_initialize(): %.100s",
- krb5_get_err_text(krb_context, problem));
- krb5_free_principal(krb_context, princ);
- krb5_cc_destroy(krb_context, ccache);
- return;
- }
-
- krb5_free_principal(krb_context, princ);
-
- if ((maj_status = gss_krb5_copy_ccache(&min_status,
- client->creds, ccache))) {
- logit("gss_krb5_copy_ccache() failed");
- krb5_cc_destroy(krb_context, ccache);
- return;
- }
-
- client->store.filename = xstrdup(krb5_cc_get_name(krb_context, ccache));
- client->store.envvar = "KRB5CCNAME";
- len = strlen(client->store.filename) + 6;
- client->store.envval = xmalloc(len);
- snprintf(client->store.envval, len, "FILE:%s", client->store.filename);
-
-#ifdef USE_PAM
- if (options.use_pam)
- do_pam_putenv(client->store.envvar, client->store.envval);
-#endif
-
- krb5_cc_close(krb_context, ccache);
-
- return;
-}
-
-ssh_gssapi_mech gssapi_kerberos_mech = {
- "toWM5Slw5Ew8Mqkay+al2g==",
- "Kerberos",
- {9, "\x2A\x86\x48\x86\xF7\x12\x01\x02\x02"},
- NULL,
- &ssh_gssapi_krb5_userok,
- NULL,
- &ssh_gssapi_krb5_storecreds
-};
-
-#endif /* KRB5 */
-
-#endif /* GSSAPI */
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