2 * Kerberos v5 authentication and ticket-passing routines.
4 * $FreeBSD: src/crypto/openssh/auth-krb5.c,v 1.6 2001/02/13 16:58:04 assar Exp $
7 * Copyright (c) 2002 Daniel Kouril. All rights reserved.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 RCSID("$OpenBSD: auth-krb5.c,v 1.15 2003/11/21 11:57:02 djm Exp $");
45 extern ServerOptions options
;
48 krb5_init(void *context
)
50 Authctxt
*authctxt
= (Authctxt
*)context
;
51 krb5_error_code problem
;
53 if (authctxt
->krb5_ctx
== NULL
) {
54 problem
= krb5_init_context(&authctxt
->krb5_ctx
);
58 krb5_init_ets(authctxt
->krb5_ctx
);
65 auth_krb5_password(Authctxt
*authctxt
, const char *password
)
69 krb5_principal server
;
73 krb5_error_code problem
;
74 krb5_ccache ccache
= NULL
;
80 temporarily_use_uid(authctxt
->pw
);
82 problem
= krb5_init(authctxt
);
86 problem
= krb5_parse_name(authctxt
->krb5_ctx
, authctxt
->pw
->pw_name
,
87 &authctxt
->krb5_user
);
92 problem
= krb5_cc_gen_new(authctxt
->krb5_ctx
, &krb5_mcc_ops
, &ccache
);
96 problem
= krb5_cc_initialize(authctxt
->krb5_ctx
, ccache
,
103 problem
= krb5_verify_user(authctxt
->krb5_ctx
, authctxt
->krb5_user
,
104 ccache
, password
, 1, NULL
);
106 temporarily_use_uid(authctxt
->pw
);
111 problem
= krb5_cc_gen_new(authctxt
->krb5_ctx
, &krb5_fcc_ops
,
112 &authctxt
->krb5_fwd_ccache
);
116 problem
= krb5_cc_copy_cache(authctxt
->krb5_ctx
, ccache
,
117 authctxt
->krb5_fwd_ccache
);
118 krb5_cc_destroy(authctxt
->krb5_ctx
, ccache
);
124 problem
= krb5_get_init_creds_password(authctxt
->krb5_ctx
, &creds
,
125 authctxt
->krb5_user
, (char *)password
, NULL
, NULL
, 0, NULL
, NULL
);
129 problem
= krb5_sname_to_principal(authctxt
->krb5_ctx
, NULL
, NULL
,
130 KRB5_NT_SRV_HST
, &server
);
135 problem
= krb5_verify_init_creds(authctxt
->krb5_ctx
, &creds
, server
,
137 krb5_free_principal(authctxt
->krb5_ctx
, server
);
138 temporarily_use_uid(authctxt
->pw
);
142 if (!krb5_kuserok(authctxt
->krb5_ctx
, authctxt
->krb5_user
,
143 authctxt
->pw
->pw_name
)) {
148 snprintf(ccname
,sizeof(ccname
),"FILE:/tmp/krb5cc_%d_XXXXXX",geteuid());
150 if ((tmpfd
= mkstemp(ccname
+strlen("FILE:")))==-1) {
151 logit("mkstemp(): %.100s", strerror(errno
));
156 if (fchmod(tmpfd
,S_IRUSR
| S_IWUSR
) == -1) {
157 logit("fchmod(): %.100s", strerror(errno
));
164 problem
= krb5_cc_resolve(authctxt
->krb5_ctx
, ccname
, &authctxt
->krb5_fwd_ccache
);
168 problem
= krb5_cc_initialize(authctxt
->krb5_ctx
, authctxt
->krb5_fwd_ccache
,
169 authctxt
->krb5_user
);
173 problem
= krb5_cc_store_cred(authctxt
->krb5_ctx
, authctxt
->krb5_fwd_ccache
,
179 authctxt
->krb5_ticket_file
= (char *)krb5_cc_get_name(authctxt
->krb5_ctx
, authctxt
->krb5_fwd_ccache
);
181 len
= strlen(authctxt
->krb5_ticket_file
) + 6;
182 authctxt
->krb5_ccname
= xmalloc(len
);
183 snprintf(authctxt
->krb5_ccname
, len
, "FILE:%s",
184 authctxt
->krb5_ticket_file
);
191 krb5_cc_destroy(authctxt
->krb5_ctx
, ccache
);
193 if (authctxt
->krb5_ctx
!= NULL
&& problem
!=-1)
194 debug("Kerberos password authentication failed: %s",
195 krb5_get_err_text(authctxt
->krb5_ctx
, problem
));
197 debug("Kerberos password authentication failed: %d",
200 krb5_cleanup_proc(authctxt
);
202 if (options
.kerberos_or_local_passwd
)
211 krb5_cleanup_proc(Authctxt
*authctxt
)
213 debug("krb5_cleanup_proc called");
214 if (authctxt
->krb5_fwd_ccache
) {
215 krb5_cc_destroy(authctxt
->krb5_ctx
, authctxt
->krb5_fwd_ccache
);
216 authctxt
->krb5_fwd_ccache
= NULL
;
218 if (authctxt
->krb5_user
) {
219 krb5_free_principal(authctxt
->krb5_ctx
, authctxt
->krb5_user
);
220 authctxt
->krb5_user
= NULL
;
222 if (authctxt
->krb5_ctx
) {
223 krb5_free_context(authctxt
->krb5_ctx
);
224 authctxt
->krb5_ctx
= NULL
;