108 lines
3.1 KiB
C
108 lines
3.1 KiB
C
/*
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* Copyright (c) 1997 - 2008 Kungliga Tekniska Högskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "krb5_locl.h"
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static krb5_error_code
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ARCFOUR_string_to_key(krb5_context context,
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krb5_enctype enctype,
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krb5_data password,
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krb5_salt salt,
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krb5_data opaque,
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krb5_keyblock *key)
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{
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krb5_error_code ret;
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uint16_t *s = NULL;
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size_t len = 0, i;
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EVP_MD_CTX *m;
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m = EVP_MD_CTX_create();
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if (m == NULL)
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return krb5_enomem(context);
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EVP_DigestInit_ex(m, EVP_md4(), NULL);
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ret = wind_utf8ucs2_length(password.data, &len);
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if (ret) {
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krb5_set_error_message (context, ret,
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N_("Password is not valid UTF-8", ""));
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goto out;
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}
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s = malloc (len * sizeof(s[0]));
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if (len != 0 && s == NULL) {
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ret = krb5_enomem(context);
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goto out;
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}
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ret = wind_utf8ucs2(password.data, s, &len);
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if (ret) {
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krb5_set_error_message (context, ret,
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N_("Password is not valid UTF-8", ""));
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goto out;
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}
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/* LE encoding */
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for (i = 0; i < len; i++) {
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unsigned char p;
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p = (s[i] & 0xff);
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EVP_DigestUpdate (m, &p, 1);
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p = (s[i] >> 8) & 0xff;
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EVP_DigestUpdate (m, &p, 1);
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}
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key->keytype = enctype;
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ret = krb5_data_alloc (&key->keyvalue, 16);
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if (ret) {
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krb5_enomem(context);
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goto out;
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}
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EVP_DigestFinal_ex (m, key->keyvalue.data, NULL);
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out:
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EVP_MD_CTX_destroy(m);
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if (s)
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memset (s, 0, len);
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free (s);
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return ret;
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}
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struct salt_type _krb5_arcfour_salt[] = {
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{
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KRB5_PW_SALT,
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"pw-salt",
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ARCFOUR_string_to_key
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},
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{ 0, NULL, NULL }
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};
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