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