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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"
int _krb5_AES_string_to_default_iterator = 4096;
static krb5_error_code
AES_string_to_key(krb5_context context,
krb5_enctype enctype,
krb5_data password,
krb5_salt salt,
krb5_data opaque,
krb5_keyblock *key)
{
krb5_error_code ret;
uint32_t iter;
struct _krb5_encryption_type *et;
struct _krb5_key_data kd;
if (opaque.length == 0)
iter = _krb5_AES_string_to_default_iterator;
else if (opaque.length == 4) {
unsigned long v;
_krb5_get_int(opaque.data, &v, 4);
iter = ((uint32_t)v);
} else
return KRB5_PROG_KEYTYPE_NOSUPP; /* XXX */
et = _krb5_find_enctype(enctype);
if (et == NULL)
return KRB5_PROG_KEYTYPE_NOSUPP;
kd.schedule = NULL;
ALLOC(kd.key, 1);
if(kd.key == NULL) {
krb5_set_error_message (context, ENOMEM, N_("malloc: out of memory", ""));
return ENOMEM;
}
kd.key->keytype = enctype;
ret = krb5_data_alloc(&kd.key->keyvalue, et->keytype->size);
if (ret) {
krb5_set_error_message (context, ret, N_("malloc: out of memory", ""));
return ret;
}
ret = PKCS5_PBKDF2_HMAC_SHA1(password.data, password.length,
salt.saltvalue.data, salt.saltvalue.length,
iter,
et->keytype->size, kd.key->keyvalue.data);
if (ret != 1) {
_krb5_free_key_data(context, &kd, et);
krb5_set_error_message(context, KRB5_PROG_KEYTYPE_NOSUPP,
"Error calculating s2k");
return KRB5_PROG_KEYTYPE_NOSUPP;
}
ret = _krb5_derive_key(context, et, &kd, "kerberos", strlen("kerberos"));
if (ret == 0)
ret = krb5_copy_keyblock_contents(context, kd.key, key);
_krb5_free_key_data(context, &kd, et);
return ret;
}
struct salt_type _krb5_AES_salt[] = {
{
KRB5_PW_SALT,
"pw-salt",
AES_string_to_key
},
{ 0 }
};
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