1/*
2 * Copyright (c) 1997-2005 Kungliga Tekniska H�gskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * 3. Neither the name of the Institute nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#include "ktutil_locl.h"
35
36RCSID("$Id: add.c 14793 2005-04-14 16:45:14Z lha $");
37
38static char *
39readstring(const char *prompt, char *buf, size_t len)
40{
41    printf("%s", prompt);
42    if (fgets(buf, len, stdin) == NULL)
43	return NULL;
44    buf[strcspn(buf, "\r\n")] = '\0';
45    return buf;
46}
47
48int
49kt_add(struct add_options *opt, int argc, char **argv)
50{
51    krb5_error_code ret;
52    krb5_keytab keytab;
53    krb5_keytab_entry entry;
54    char buf[1024];
55    krb5_enctype enctype;
56
57    if((keytab = ktutil_open_keytab()) == NULL)
58	return 1;
59
60    memset(&entry, 0, sizeof(entry));
61    if(opt->principal_string == NULL) {
62	if(readstring("Principal: ", buf, sizeof(buf)) == NULL)
63	    return 1;
64	opt->principal_string = buf;
65    }
66    ret = krb5_parse_name(context, opt->principal_string, &entry.principal);
67    if(ret) {
68	krb5_warn(context, ret, "%s", opt->principal_string);
69	goto out;
70    }
71    if(opt->enctype_string == NULL) {
72	if(readstring("Encryption type: ", buf, sizeof(buf)) == NULL) {
73	    ret = 1;
74	    goto out;
75	}
76	opt->enctype_string = buf;
77    }
78    ret = krb5_string_to_enctype(context, opt->enctype_string, &enctype);
79    if(ret) {
80	int t;
81	if(sscanf(opt->enctype_string, "%d", &t) == 1)
82	    enctype = t;
83	else {
84	    krb5_warn(context, ret, "%s", opt->enctype_string);
85	    goto out;
86	}
87    }
88    if(opt->kvno_integer == -1) {
89	if(readstring("Key version: ", buf, sizeof(buf)) == NULL) {
90	    ret = 1;
91	    goto out;
92	}
93	if(sscanf(buf, "%u", &opt->kvno_integer) != 1)
94	    goto out;
95    }
96    if(opt->password_string == NULL && opt->random_flag == 0) {
97	if(UI_UTIL_read_pw_string(buf, sizeof(buf), "Password: ", 1)) {
98	    ret = 1;
99	    goto out;
100	}
101	opt->password_string = buf;
102    }
103    if(opt->password_string) {
104	if (opt->hex_flag) {
105	    size_t len;
106	    void *data;
107
108	    len = (strlen(opt->password_string) + 1) / 2;
109
110	    data = malloc(len);
111	    if (data == NULL) {
112		krb5_warn(context, ENOMEM, "malloc");
113		goto out;
114	    }
115
116	    if (hex_decode(opt->password_string, data, len) != len) {
117		free(data);
118		krb5_warn(context, ENOMEM, "hex decode failed");
119		goto out;
120	    }
121
122	    ret = krb5_keyblock_init(context, enctype,
123				     data, len, &entry.keyblock);
124	    free(data);
125	} else if (!opt->salt_flag) {
126	    krb5_salt salt;
127	    krb5_data pw;
128
129	    salt.salttype         = KRB5_PW_SALT;
130	    salt.saltvalue.data   = NULL;
131	    salt.saltvalue.length = 0;
132	    pw.data = (void*)opt->password_string;
133	    pw.length = strlen(opt->password_string);
134	    ret = krb5_string_to_key_data_salt(context, enctype, pw, salt,
135					       &entry.keyblock);
136        } else {
137	    ret = krb5_string_to_key(context, enctype, opt->password_string,
138				     entry.principal, &entry.keyblock);
139	}
140	memset (opt->password_string, 0, strlen(opt->password_string));
141    } else {
142	ret = krb5_generate_random_keyblock(context, enctype, &entry.keyblock);
143    }
144    if(ret) {
145	krb5_warn(context, ret, "add");
146	goto out;
147    }
148    entry.vno = opt->kvno_integer;
149    entry.timestamp = time (NULL);
150    ret = krb5_kt_add_entry(context, keytab, &entry);
151    if(ret)
152	krb5_warn(context, ret, "add");
153 out:
154    krb5_kt_free_entry(context, &entry);
155    krb5_kt_close(context, keytab);
156    return ret != 0;
157}
158