freebsd-dev/crypto/heimdal/kdc/string2key.c
2008-05-07 13:39:42 +00:00

202 lines
5.9 KiB
C

/*
* Copyright (c) 1997-2003 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "headers.h"
#include <getarg.h>
RCSID("$Id: string2key.c 19213 2006-12-04 23:36:36Z lha $");
int version5;
int version4;
int afs;
char *principal;
char *cell;
char *password;
const char *keytype_str = "des3-cbc-sha1";
int version;
int help;
struct getargs args[] = {
{ "version5", '5', arg_flag, &version5, "Output Kerberos v5 string-to-key" },
{ "version4", '4', arg_flag, &version4, "Output Kerberos v4 string-to-key" },
{ "afs", 'a', arg_flag, &afs, "Output AFS string-to-key" },
{ "cell", 'c', arg_string, &cell, "AFS cell to use", "cell" },
{ "password", 'w', arg_string, &password, "Password to use", "password" },
{ "principal",'p', arg_string, &principal, "Kerberos v5 principal to use", "principal" },
{ "keytype", 'k', arg_string, &keytype_str, "Keytype" },
{ "version", 0, arg_flag, &version, "print version" },
{ "help", 0, arg_flag, &help, NULL }
};
int num_args = sizeof(args) / sizeof(args[0]);
static void
usage(int status)
{
arg_printusage (args, num_args, NULL, "password");
exit(status);
}
static void
tokey(krb5_context context,
krb5_enctype enctype,
const char *pw,
krb5_salt salt,
const char *label)
{
krb5_error_code ret;
int i;
krb5_keyblock key;
char *e;
ret = krb5_string_to_key_salt(context, enctype, pw, salt, &key);
if (ret)
krb5_err(context, 1, ret, "krb5_string_to_key_salt");
ret = krb5_enctype_to_string(context, enctype, &e);
if (ret)
krb5_err(context, 1, ret, "krb5_enctype_to_string");
printf(label, e);
printf(": ");
for(i = 0; i < key.keyvalue.length; i++)
printf("%02x", ((unsigned char*)key.keyvalue.data)[i]);
printf("\n");
krb5_free_keyblock_contents(context, &key);
free(e);
}
int
main(int argc, char **argv)
{
krb5_context context;
krb5_principal princ;
krb5_salt salt;
int optidx;
char buf[1024];
krb5_enctype etype;
krb5_error_code ret;
optidx = krb5_program_setup(&context, argc, argv, args, num_args, NULL);
if(help)
usage(0);
if(version){
print_version (NULL);
return 0;
}
argc -= optidx;
argv += optidx;
if (argc > 1)
usage(1);
if(!version5 && !version4 && !afs)
version5 = 1;
ret = krb5_string_to_enctype(context, keytype_str, &etype);
if(ret) {
krb5_keytype keytype;
int *etypes;
unsigned num;
char *str;
ret = krb5_string_to_keytype(context, keytype_str, &keytype);
if(ret)
krb5_err(context, 1, ret, "%s", keytype_str);
ret = krb5_keytype_to_enctypes(context, keytype, &num, &etypes);
if(ret)
krb5_err(context, 1, ret, "%s", keytype_str);
if(num == 0)
krb5_errx(context, 1, "there are no encryption types for that keytype");
etype = etypes[0];
krb5_enctype_to_string(context, etype, &str);
keytype_str = str;
if(num > 1 && version5)
krb5_warnx(context, "ambiguous keytype, using %s", keytype_str);
}
if((etype != ETYPE_DES_CBC_CRC &&
etype != ETYPE_DES_CBC_MD4 &&
etype != ETYPE_DES_CBC_MD5) &&
(afs || version4)) {
if(!version5) {
etype = ETYPE_DES_CBC_CRC;
} else {
krb5_errx(context, 1,
"DES is the only valid keytype for AFS and Kerberos 4");
}
}
if(version5 && principal == NULL){
printf("Kerberos v5 principal: ");
if(fgets(buf, sizeof(buf), stdin) == NULL)
return 1;
buf[strcspn(buf, "\r\n")] = '\0';
principal = estrdup(buf);
}
if(afs && cell == NULL){
printf("AFS cell: ");
if(fgets(buf, sizeof(buf), stdin) == NULL)
return 1;
buf[strcspn(buf, "\r\n")] = '\0';
cell = estrdup(buf);
}
if(argv[0])
password = argv[0];
if(password == NULL){
if(UI_UTIL_read_pw_string(buf, sizeof(buf), "Password: ", 0))
return 1;
password = buf;
}
if(version5){
krb5_parse_name(context, principal, &princ);
krb5_get_pw_salt(context, princ, &salt);
tokey(context, etype, password, salt, "Kerberos 5 (%s)");
krb5_free_salt(context, salt);
}
if(version4){
salt.salttype = KRB5_PW_SALT;
salt.saltvalue.length = 0;
salt.saltvalue.data = NULL;
tokey(context, ETYPE_DES_CBC_MD5, password, salt, "Kerberos 4");
}
if(afs){
salt.salttype = KRB5_AFS3_SALT;
salt.saltvalue.length = strlen(cell);
salt.saltvalue.data = cell;
tokey(context, ETYPE_DES_CBC_MD5, password, salt, "AFS");
}
return 0;
}