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/*
* Copyright (c) 1997 - 2008 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 "krb5_locl.h"
#ifdef DES3_OLD_ENCTYPE
static krb5_error_code
DES3_string_to_key(krb5_context context,
krb5_enctype enctype,
krb5_data password,
krb5_salt salt,
krb5_data opaque,
krb5_keyblock *key)
{
char *str;
size_t len;
unsigned char tmp[24];
DES_cblock keys[3];
krb5_error_code ret;
len = password.length + salt.saltvalue.length;
str = malloc(len);
if (len != 0 && str == NULL)
return krb5_enomem(context);
memcpy(str, password.data, password.length);
memcpy(str + password.length, salt.saltvalue.data, salt.saltvalue.length);
{
DES_cblock ivec;
DES_key_schedule s[3];
int i;
ret = _krb5_n_fold(str, len, tmp, 24);
if (ret) {
memset_s(str, len, 0, len);
free(str);
krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
return ret;
}
for(i = 0; i < 3; i++){
memcpy(keys + i, tmp + i * 8, sizeof(keys[i]));
DES_set_odd_parity(keys + i);
if(DES_is_weak_key(keys + i))
_krb5_xor8(*(keys + i), (const unsigned char*)"\0\0\0\0\0\0\0\xf0");
DES_set_key_unchecked(keys + i, &s[i]);
}
memset_s(&ivec, sizeof(ivec), 0, sizeof(ivec));
DES_ede3_cbc_encrypt(tmp,
tmp, sizeof(tmp),
&s[0], &s[1], &s[2], &ivec, DES_ENCRYPT);
memset_s(s, sizeof(s), 0, sizeof(s));
memset_s(&ivec, sizeof(ivec), 0, sizeof(ivec));
for(i = 0; i < 3; i++){
memcpy(keys + i, tmp + i * 8, sizeof(keys[i]));
DES_set_odd_parity(keys + i);
if(DES_is_weak_key(keys + i))
_krb5_xor8(*(keys + i), (const unsigned char*)"\0\0\0\0\0\0\0\xf0");
}
memset_s(tmp, sizeof(tmp), 0, sizeof(tmp));
}
key->keytype = enctype;
krb5_data_copy(&key->keyvalue, keys, sizeof(keys));
memset_s(keys, sizeof(keys), 0, sizeof(keys));
memset_s(str, len, 0, len);
free(str);
return 0;
}
#endif
static krb5_error_code
DES3_string_to_key_derived(krb5_context context,
krb5_enctype enctype,
krb5_data password,
krb5_salt salt,
krb5_data opaque,
krb5_keyblock *key)
{
krb5_error_code ret;
size_t len = password.length + salt.saltvalue.length;
char *s;
s = malloc(len);
if (len != 0 && s == NULL)
return krb5_enomem(context);
memcpy(s, password.data, password.length);
memcpy(s + password.length, salt.saltvalue.data, salt.saltvalue.length);
ret = krb5_string_to_key_derived(context,
s,
len,
enctype,
key);
memset_s(s, len, 0, len);
free(s);
return ret;
}
#ifdef DES3_OLD_ENCTYPE
struct salt_type _krb5_des3_salt[] = {
{
KRB5_PW_SALT,
"pw-salt",
DES3_string_to_key
},
{ 0, NULL, NULL }
};
#endif
struct salt_type _krb5_des3_salt_derived[] = {
{
KRB5_PW_SALT,
"pw-salt",
DES3_string_to_key_derived
},
{ 0, NULL, NULL }
};
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