1/*
2 * Copyright (c) 1997-2005 Kungliga Tekniska Högskolan
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("$Id$");
37
38static char *
39readstring(const char *prompt, char *buf, size_t len)
40{
41    printf("%s", prompt);
42    if (fgets(buf, (int)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->pw_file_string) {
97	FILE *f;
98
99	if (strcasecmp("STDIN", opt->pw_file_string) == 0)
100	    f = stdin;
101	else
102	    f = fopen(opt->pw_file_string, "r");
103	if (f == NULL)
104	    krb5_errx(context, 1, "Failed to open the password file %s",
105		      opt->pw_file_string);
106
107	if (fgets(buf, sizeof(buf), f) == NULL)
108	    krb5_errx(context, 1,
109		      "Failed to read password from file %s",
110		      opt->pw_file_string);
111	if (f != stdin)
112	    fclose(f);
113	buf[strcspn(buf, "\n")] = '\0';
114
115	opt->password_string = buf;
116    }
117    if(opt->password_string == NULL && opt->random_flag == 0) {
118	if(UI_UTIL_read_pw_string(buf, sizeof(buf), "Password: ", 1)) {
119	    ret = 1;
120	    goto out;
121	}
122	opt->password_string = buf;
123    }
124    if(opt->password_string) {
125	if (opt->hex_flag) {
126	    size_t len;
127	    void *data;
128
129	    len = (strlen(opt->password_string) + 1) / 2;
130
131	    data = malloc(len);
132	    if (data == NULL) {
133		krb5_warn(context, ENOMEM, "malloc");
134		goto out;
135	    }
136
137	    if ((size_t)hex_decode(opt->password_string, data, len) != len) {
138		free(data);
139		krb5_warn(context, ENOMEM, "hex decode failed");
140		goto out;
141	    }
142
143	    ret = krb5_keyblock_init(context, enctype,
144				     data, len, &entry.keyblock);
145	    free(data);
146	} else if (!opt->salt_flag) {
147	    krb5_salt salt;
148	    krb5_data pw;
149
150	    salt.salttype         = KRB5_PW_SALT;
151	    salt.saltvalue.data   = NULL;
152	    salt.saltvalue.length = 0;
153	    pw.data = (void*)opt->password_string;
154	    pw.length = strlen(opt->password_string);
155	    ret = krb5_string_to_key_data_salt(context, enctype, pw, salt,
156					       &entry.keyblock);
157        } else {
158	    ret = krb5_string_to_key(context, enctype, opt->password_string,
159				     entry.principal, &entry.keyblock);
160	}
161	memset (opt->password_string, 0, strlen(opt->password_string));
162    } else {
163	ret = krb5_generate_random_keyblock(context, enctype, &entry.keyblock);
164    }
165    if(ret) {
166	krb5_warn(context, ret, "add");
167	goto out;
168    }
169    entry.vno = opt->kvno_integer;
170    entry.timestamp = (uint32_t)time (NULL);
171    ret = krb5_kt_add_entry(context, keytab, &entry);
172    if(ret)
173	krb5_warn(context, ret, "add");
174 out:
175    krb5_kt_free_entry(context, &entry);
176    krb5_kt_close(context, keytab);
177    return ret != 0;
178}
179