2 Unix SMB/CIFS implementation.
3 kerberos utility library
4 Copyright (C) Andrew Tridgell 2001
5 Copyright (C) Remus Koos 2001
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
28 simulate a kinit, putting the tgt in the default cache location
31 int kerberos_kinit_password(const char *principal, const char *password)
34 krb5_error_code code = 0;
40 /* kerberos dies on an empty password! */
41 return KRB5_PARSE_MALFORMED;
44 if ((code = krb5_init_context(&ctx)))
47 if ((code = krb5_cc_default(ctx, &cc))) {
48 krb5_free_context(ctx);
52 if ((code = krb5_parse_name(ctx, principal, &me))) {
53 krb5_free_context(ctx);
57 if ((code = krb5_get_init_creds_password(ctx, &my_creds, me, (char*)password, NULL,
58 NULL, 0, NULL, NULL))) {
59 krb5_free_principal(ctx, me);
60 krb5_free_context(ctx);
64 if ((code = krb5_cc_initialize(ctx, cc, me))) {
65 krb5_free_cred_contents(ctx, &my_creds);
66 krb5_free_principal(ctx, me);
67 krb5_free_context(ctx);
71 if ((code = krb5_cc_store_cred(ctx, cc, &my_creds))) {
72 krb5_cc_close(ctx, cc);
73 krb5_free_cred_contents(ctx, &my_creds);
74 krb5_free_principal(ctx, me);
75 krb5_free_context(ctx);
79 krb5_cc_close(ctx, cc);
80 krb5_free_cred_contents(ctx, &my_creds);
81 krb5_free_principal(ctx, me);
82 krb5_free_context(ctx);
89 /* run kinit to setup our ccache */
90 int ads_kinit_password(ADS_STRUCT *ads)
95 if (!ads->user_name) {
96 /* by default use the machine account */
97 extern pstring global_myname;
99 fstrcpy(myname, global_myname);
101 asprintf(&ads->user_name, "HOST/%s", global_myname);
103 asprintf(&s, "%s@%s", ads->user_name, ads->realm);
104 ret = kerberos_kinit_password(s, ads->password);
107 DEBUG(0,("kerberos_kinit_password %s failed: %s\n",
108 s, error_message(ret)));
115 verify an incoming ticket and parse out the principal name and
116 authorization_data if available
118 NTSTATUS ads_verify_ticket(ADS_STRUCT *ads, const DATA_BLOB *ticket,
119 char **principal, DATA_BLOB *auth_data)
121 krb5_context context;
122 krb5_auth_context auth_context = NULL;
123 krb5_keytab keytab = NULL;
125 krb5_ticket *tkt = NULL;
127 krb5_encrypt_block eblock;
130 krb5_principal host_princ;
132 extern pstring global_myname;
137 if (!secrets_init()) {
138 DEBUG(1,("secrets_init failed\n"));
139 return NT_STATUS_LOGON_FAILURE;
142 password_s = secrets_fetch_machine_password();
144 DEBUG(1,("failed to fetch machine password\n"));
145 return NT_STATUS_LOGON_FAILURE;
148 password.data = password_s;
149 password.length = strlen(password_s);
151 ret = krb5_init_context(&context);
153 DEBUG(1,("krb5_init_context failed (%s)\n", error_message(ret)));
154 return NT_STATUS_LOGON_FAILURE;
157 ret = krb5_set_default_realm(context, ads->realm);
159 DEBUG(1,("krb5_set_default_realm failed (%s)\n", error_message(ret)));
161 return NT_STATUS_LOGON_FAILURE;
164 /* this whole process is far more complex than I would
165 like. We have to go through all this to allow us to store
166 the secret internally, instead of using /etc/krb5.keytab */
167 ret = krb5_auth_con_init(context, &auth_context);
169 DEBUG(1,("krb5_auth_con_init failed (%s)\n", error_message(ret)));
170 return NT_STATUS_LOGON_FAILURE;
173 fstrcpy(myname, global_myname);
175 asprintf(&host_princ_s, "HOST/%s@%s", myname, lp_realm());
176 ret = krb5_parse_name(context, host_princ_s, &host_princ);
178 DEBUG(1,("krb5_parse_name(%s) failed (%s)\n", host_princ_s, error_message(ret)));
179 return NT_STATUS_LOGON_FAILURE;
182 ret = krb5_principal2salt(context, host_princ, &salt);
184 DEBUG(1,("krb5_principal2salt failed (%s)\n", error_message(ret)));
185 return NT_STATUS_LOGON_FAILURE;
188 if (!(key = (krb5_keyblock *)malloc(sizeof(*key)))) {
189 return NT_STATUS_NO_MEMORY;
192 krb5_use_enctype(context, &eblock, ENCTYPE_DES_CBC_MD5);
194 ret = krb5_string_to_key(context, &eblock, key, &password, &salt);
196 DEBUG(1,("krb5_string_to_key failed (%s)\n", error_message(ret)));
197 return NT_STATUS_LOGON_FAILURE;
200 krb5_auth_con_setuseruserkey(context, auth_context, key);
202 packet.length = ticket->length;
203 packet.data = (krb5_pointer)ticket->data;
206 file_save("/tmp/ticket.dat", ticket->data, ticket->length);
209 if ((ret = krb5_rd_req(context, &auth_context, &packet,
210 NULL, keytab, NULL, &tkt))) {
211 DEBUG(3,("krb5_rd_req with auth failed (%s)\n",
212 error_message(ret)));
213 return NT_STATUS_LOGON_FAILURE;
216 if (tkt->enc_part2) {
217 *auth_data = data_blob(tkt->enc_part2->authorization_data[0]->contents,
218 tkt->enc_part2->authorization_data[0]->length);
222 if (tkt->enc_part2) {
223 file_save("/tmp/authdata.dat",
224 tkt->enc_part2->authorization_data[0]->contents,
225 tkt->enc_part2->authorization_data[0]->length);
229 if ((ret = krb5_unparse_name(context, tkt->enc_part2->client, principal))) {
230 DEBUG(3,("krb5_unparse_name failed (%s)\n",
231 error_message(ret)));
232 return NT_STATUS_LOGON_FAILURE;