1 /*
2 * Copyright (c) 1997-2003 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 "headers.h"
35 #include <getarg.h>
36
37 int version5;
38 int version4;
39 int afs;
40 char *principal;
41 char *cell;
42 char *password;
43 const char *keytype_str = "des3-cbc-sha1";
44 int version;
45 int help;
46
47 struct getargs args[] = {
48 { "version5", '5', arg_flag, &version5, "Output Kerberos v5 string-to-key",
49 NULL },
50 { "version4", '4', arg_flag, &version4, "Output Kerberos v4 string-to-key",
51 NULL },
52 { "afs", 'a', arg_flag, &afs, "Output AFS string-to-key", NULL },
53 { "cell", 'c', arg_string, &cell, "AFS cell to use", "cell" },
54 { "password", 'w', arg_string, &password, "Password to use", "password" },
55 { "principal",'p', arg_string, &principal, "Kerberos v5 principal to use", "principal" },
56 { "keytype", 'k', arg_string, rk_UNCONST(&keytype_str), "Keytype", NULL },
57 { "version", 0, arg_flag, &version, "print version", NULL },
58 { "help", 0, arg_flag, &help, NULL, NULL }
59 };
60
61 int num_args = sizeof(args) / sizeof(args[0]);
62
63 static void
usage(int status)64 usage(int status)
65 {
66 arg_printusage (args, num_args, NULL, "password");
67 exit(status);
68 }
69
70 static void
tokey(krb5_context context,krb5_enctype enctype,const char * pw,krb5_salt salt,const char * label)71 tokey(krb5_context context,
72 krb5_enctype enctype,
73 const char *pw,
74 krb5_salt salt,
75 const char *label)
76 {
77 krb5_error_code ret;
78 size_t i;
79 krb5_keyblock key;
80 char *e;
81
82 ret = krb5_string_to_key_salt(context, enctype, pw, salt, &key);
83 if (ret)
84 krb5_err(context, 1, ret, "krb5_string_to_key_salt");
85 ret = krb5_enctype_to_string(context, enctype, &e);
86 if (ret)
87 krb5_err(context, 1, ret, "krb5_enctype_to_string");
88 printf(label, e);
89 printf(": ");
90 for(i = 0; i < key.keyvalue.length; i++)
91 printf("%02x", ((unsigned char*)key.keyvalue.data)[i]);
92 printf("\n");
93 krb5_free_keyblock_contents(context, &key);
94 free(e);
95 }
96
97 int
main(int argc,char ** argv)98 main(int argc, char **argv)
99 {
100 krb5_context context;
101 krb5_principal princ;
102 krb5_salt salt;
103 int optidx;
104 char buf[1024];
105 krb5_enctype etype;
106 krb5_error_code ret;
107
108 optidx = krb5_program_setup(&context, argc, argv, args, num_args, NULL);
109
110 if(help)
111 usage(0);
112
113 if(version){
114 print_version (NULL);
115 return 0;
116 }
117
118 argc -= optidx;
119 argv += optidx;
120
121 if (argc > 1)
122 usage(1);
123
124 if(!version5 && !version4 && !afs)
125 version5 = 1;
126
127 ret = krb5_string_to_enctype(context, keytype_str, &etype);
128 if(ret)
129 krb5_err(context, 1, ret, "krb5_string_to_enctype");
130
131 if((etype != ETYPE_DES_CBC_CRC &&
132 etype != ETYPE_DES_CBC_MD4 &&
133 etype != ETYPE_DES_CBC_MD5) &&
134 (afs || version4)) {
135 if(!version5) {
136 etype = ETYPE_DES_CBC_CRC;
137 } else {
138 krb5_errx(context, 1,
139 "DES is the only valid keytype for AFS and Kerberos 4");
140 }
141 }
142
143 if(version5 && principal == NULL){
144 printf("Kerberos v5 principal: ");
145 if(fgets(buf, sizeof(buf), stdin) == NULL)
146 return 1;
147 buf[strcspn(buf, "\r\n")] = '\0';
148 principal = estrdup(buf);
149 }
150 if(afs && cell == NULL){
151 printf("AFS cell: ");
152 if(fgets(buf, sizeof(buf), stdin) == NULL)
153 return 1;
154 buf[strcspn(buf, "\r\n")] = '\0';
155 cell = estrdup(buf);
156 }
157 if(argv[0])
158 password = argv[0];
159 if(password == NULL){
160 if(UI_UTIL_read_pw_string(buf, sizeof(buf), "Password: ", 0))
161 return 1;
162 password = buf;
163 }
164
165 if(version5){
166 krb5_parse_name(context, principal, &princ);
167 krb5_get_pw_salt(context, princ, &salt);
168 tokey(context, etype, password, salt, "Kerberos 5 (%s)");
169 krb5_free_salt(context, salt);
170 }
171 if(version4){
172 salt.salttype = KRB5_PW_SALT;
173 salt.saltvalue.length = 0;
174 salt.saltvalue.data = NULL;
175 tokey(context, ETYPE_DES_CBC_MD5, password, salt, "Kerberos 4");
176 }
177 if(afs){
178 salt.salttype = KRB5_AFS3_SALT;
179 salt.saltvalue.length = strlen(cell);
180 salt.saltvalue.data = cell;
181 tokey(context, ETYPE_DES_CBC_MD5, password, salt, "AFS");
182 }
183 return 0;
184 }
185