1 /*        $NetBSD: ank.c,v 1.3 2023/06/19 21:41:41 christos Exp $     */
2 
3 /*
4  * Copyright (c) 1997-2006 Kungliga Tekniska Högskolan
5  * (Royal Institute of Technology, Stockholm, Sweden).
6  * All rights reserved.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  *
12  * 1. Redistributions of source code must retain the above copyright
13  *    notice, this list of conditions and the following disclaimer.
14  *
15  * 2. Redistributions in binary form must reproduce the above copyright
16  *    notice, this list of conditions and the following disclaimer in the
17  *    documentation and/or other materials provided with the distribution.
18  *
19  * 3. Neither the name of the Institute nor the names of its contributors
20  *    may be used to endorse or promote products derived from this software
21  *    without specific prior written permission.
22  *
23  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33  * SUCH DAMAGE.
34  */
35 
36 #include "kadmin_locl.h"
37 #include "kadmin-commands.h"
38 
39 /*
40  * fetch the default principal corresponding to `princ'
41  */
42 
43 static krb5_error_code
get_default(kadm5_server_context * contextp,krb5_principal princ,kadm5_principal_ent_t default_ent)44 get_default (kadm5_server_context *contextp,
45                krb5_principal princ,
46                kadm5_principal_ent_t default_ent)
47 {
48     krb5_error_code ret;
49     krb5_principal def_principal;
50     krb5_const_realm realm = krb5_principal_get_realm(contextp->context, princ);
51 
52     ret = krb5_make_principal (contextp->context, &def_principal,
53                                      realm, "default", NULL);
54     if (ret)
55           return ret;
56     ret = kadm5_get_principal (contextp, def_principal, default_ent,
57                                      KADM5_PRINCIPAL_NORMAL_MASK);
58     krb5_free_principal (contextp->context, def_principal);
59     return ret;
60 }
61 
62 /*
63  * Add the principal `name' to the database.
64  * Prompt for all data not given by the input parameters.
65  */
66 
67 static krb5_error_code
add_one_principal(const char * name,int rand_key,int rand_password,int use_defaults,char * password,char * policy,krb5_key_data * key_data,const char * max_ticket_life,const char * max_renewable_life,const char * attributes,const char * expiration,const char * pw_expiration)68 add_one_principal (const char *name,
69                        int rand_key,
70                        int rand_password,
71                        int use_defaults,
72                        char *password,
73                        char *policy,
74                        krb5_key_data *key_data,
75                        const char *max_ticket_life,
76                        const char *max_renewable_life,
77                        const char *attributes,
78                        const char *expiration,
79                        const char *pw_expiration)
80 {
81     krb5_error_code ret;
82     kadm5_principal_ent_rec princ, defrec;
83     kadm5_principal_ent_rec *default_ent = NULL;
84     krb5_principal princ_ent = NULL;
85     int mask = 0;
86     int default_mask = 0;
87     char pwbuf[1024];
88 
89     memset(&princ, 0, sizeof(princ));
90     ret = krb5_parse_name(context, name, &princ_ent);
91     if (ret) {
92           krb5_warn(context, ret, "krb5_parse_name");
93           return ret;
94     }
95     princ.principal = princ_ent;
96     mask |= KADM5_PRINCIPAL;
97 
98     ret = set_entry(context, &princ, &mask,
99                         max_ticket_life, max_renewable_life,
100                         expiration, pw_expiration, attributes, policy);
101     if (ret)
102           goto out;
103 
104     default_ent = &defrec;
105     ret = get_default (kadm_handle, princ_ent, default_ent);
106     if (ret) {
107           default_ent  = NULL;
108           default_mask = 0;
109     } else {
110           default_mask = KADM5_ATTRIBUTES | KADM5_MAX_LIFE | KADM5_MAX_RLIFE |
111               KADM5_PRINC_EXPIRE_TIME | KADM5_PW_EXPIRATION;
112     }
113 
114     if(use_defaults)
115           set_defaults(&princ, &mask, default_ent, default_mask);
116     else
117           if(edit_entry(&princ, &mask, default_ent, default_mask))
118               goto out;
119     if(rand_key || key_data) {
120           princ.attributes |= KRB5_KDB_DISALLOW_ALL_TIX;
121           mask |= KADM5_ATTRIBUTES;
122           random_password (pwbuf, sizeof(pwbuf));
123           password = pwbuf;
124     } else if (rand_password) {
125           random_password (pwbuf, sizeof(pwbuf));
126           password = pwbuf;
127     } else if(password == NULL) {
128           char *princ_name;
129           char *prompt;
130           int aret;
131 
132           ret = krb5_unparse_name(context, princ_ent, &princ_name);
133           if (ret)
134               goto out;
135           aret = asprintf (&prompt, "%s's Password: ", princ_name);
136           free (princ_name);
137           if (aret == -1) {
138               ret = ENOMEM;
139               krb5_set_error_message(context, ret, "out of memory");
140               goto out;
141           }
142           ret = UI_UTIL_read_pw_string (pwbuf, sizeof(pwbuf), prompt,
143                                               UI_UTIL_FLAG_VERIFY |
144                                               UI_UTIL_FLAG_VERIFY_SILENT);
145           free (prompt);
146           if (ret) {
147               ret = KRB5_LIBOS_BADPWDMATCH;
148               krb5_set_error_message(context, ret, "failed to verify password");
149               goto out;
150           }
151           password = pwbuf;
152     }
153 
154     ret = kadm5_create_principal(kadm_handle, &princ, mask, password);
155     if(ret) {
156           krb5_warn(context, ret, "kadm5_create_principal");
157           goto out;
158     }
159     if(rand_key) {
160           krb5_keyblock *new_keys;
161           int n_keys, i;
162           ret = kadm5_randkey_principal(kadm_handle, princ_ent,
163                                               &new_keys, &n_keys);
164           if(ret){
165               krb5_warn(context, ret, "kadm5_randkey_principal");
166               n_keys = 0;
167           }
168           for(i = 0; i < n_keys; i++)
169               krb5_free_keyblock_contents(context, &new_keys[i]);
170           if (n_keys > 0)
171               free(new_keys);
172           kadm5_get_principal(kadm_handle, princ_ent, &princ,
173                                   KADM5_PRINCIPAL | KADM5_KVNO | KADM5_ATTRIBUTES);
174         krb5_free_principal(context, princ_ent);
175         princ_ent = princ.principal;
176           princ.attributes &= (~KRB5_KDB_DISALLOW_ALL_TIX);
177           /*
178            * Updating kvno w/o key data and vice-versa gives _kadm5_setup_entry()
179            * and _kadm5_set_keys2() headaches.  But we used to, so we handle
180            * this in in those two functions.  Might as well leave this code as
181            * it was then.
182            */
183           princ.kvno = 1;
184           kadm5_modify_principal(kadm_handle, &princ,
185                                      KADM5_ATTRIBUTES | KADM5_KVNO);
186     } else if (key_data) {
187           ret = kadm5_chpass_principal_with_key (kadm_handle, princ_ent,
188                                                          3, key_data);
189           if (ret) {
190               krb5_warn(context, ret, "kadm5_chpass_principal_with_key");
191           }
192           kadm5_get_principal(kadm_handle, princ_ent, &princ,
193                                   KADM5_PRINCIPAL | KADM5_ATTRIBUTES);
194         krb5_free_principal(context, princ_ent);
195         princ_ent = princ.principal;
196           princ.attributes &= (~KRB5_KDB_DISALLOW_ALL_TIX);
197           kadm5_modify_principal(kadm_handle, &princ, KADM5_ATTRIBUTES);
198     } else if (rand_password) {
199           char *princ_name;
200 
201           krb5_unparse_name(context, princ_ent, &princ_name);
202           printf ("added %s with password \"%s\"\n", princ_name, password);
203           free (princ_name);
204     }
205 out:
206     kadm5_free_principal_ent(kadm_handle, &princ); /* frees princ_ent */
207     if(default_ent)
208           kadm5_free_principal_ent (kadm_handle, default_ent);
209     if (password != NULL)
210           memset (password, 0, strlen(password));
211     return ret;
212 }
213 
214 /*
215  * parse the string `key_string' into `key', returning 0 iff succesful.
216  */
217 
218 /*
219  * the ank command
220  */
221 
222 /*
223  * Parse arguments and add all the principals.
224  */
225 
226 int
add_new_key(struct add_options * opt,int argc,char ** argv)227 add_new_key(struct add_options *opt, int argc, char **argv)
228 {
229     krb5_error_code ret = 0;
230     int i;
231     int num;
232     krb5_key_data key_data[3];
233     krb5_key_data *kdp = NULL;
234 
235     num = 0;
236     if (opt->random_key_flag)
237           ++num;
238     if (opt->random_password_flag)
239           ++num;
240     if (opt->password_string)
241           ++num;
242     if (opt->key_string)
243           ++num;
244 
245     if (num > 1) {
246           fprintf (stderr, "give only one of "
247                     "--random-key, --random-password, --password, --key\n");
248           return 1;
249     }
250 
251     if (opt->key_string) {
252           const char *error;
253 
254           if (parse_des_key (opt->key_string, key_data, &error)) {
255               fprintf (stderr, "failed parsing key \"%s\": %s\n",
256                          opt->key_string, error);
257               return 1;
258           }
259           kdp = key_data;
260     }
261 
262     for(i = 0; i < argc; i++) {
263           ret = add_one_principal (argv[i],
264                                          opt->random_key_flag,
265                                          opt->random_password_flag,
266                                          opt->use_defaults_flag,
267                                          opt->password_string,
268                                          opt->policy_string,
269                                          kdp,
270                                          opt->max_ticket_life_string,
271                                          opt->max_renewable_life_string,
272                                          opt->attributes_string,
273                                          opt->expiration_time_string,
274                                          opt->pw_expiration_time_string);
275           if (ret) {
276               krb5_warn (context, ret, "adding %s", argv[i]);
277               break;
278           }
279     }
280     if (kdp) {
281           int16_t dummy = 3;
282           kadm5_free_key_data (kadm_handle, &dummy, key_data);
283     }
284     return ret != 0;
285 }
286