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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"
static krb5_error_code
ARCFOUR_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;
uint16_t *s = NULL;
size_t len = 0, i;
EVP_MD_CTX *m;
m = EVP_MD_CTX_create();
if (m == NULL) {
ret = ENOMEM;
krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
goto out;
}
EVP_DigestInit_ex(m, EVP_md4(), NULL);
ret = wind_utf8ucs2_length(password.data, &len);
if (ret) {
krb5_set_error_message (context, ret,
N_("Password not an UCS2 string", ""));
goto out;
}
s = malloc (len * sizeof(s[0]));
if (len != 0 && s == NULL) {
krb5_set_error_message (context, ENOMEM,
N_("malloc: out of memory", ""));
ret = ENOMEM;
goto out;
}
ret = wind_utf8ucs2(password.data, s, &len);
if (ret) {
krb5_set_error_message (context, ret,
N_("Password not an UCS2 string", ""));
goto out;
}
/* LE encoding */
for (i = 0; i < len; i++) {
unsigned char p;
p = (s[i] & 0xff);
EVP_DigestUpdate (m, &p, 1);
p = (s[i] >> 8) & 0xff;
EVP_DigestUpdate (m, &p, 1);
}
key->keytype = enctype;
ret = krb5_data_alloc (&key->keyvalue, 16);
if (ret) {
krb5_set_error_message (context, ENOMEM, N_("malloc: out of memory", ""));
goto out;
}
EVP_DigestFinal_ex (m, key->keyvalue.data, NULL);
out:
EVP_MD_CTX_destroy(m);
if (s)
memset (s, 0, len);
free (s);
return ret;
}
struct salt_type _krb5_arcfour_salt[] = {
{
KRB5_PW_SALT,
"pw-salt",
ARCFOUR_string_to_key
},
{ 0 }
};
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