1d9072f026
lib/krb5/crypto.c was a large, monolithic block of code which made it very difficult to selectively enable and disable particular alogrithms. Reorganise crypto.c into individual files for each encryption and salt time, and place the structures which tie everything together into their own file (crypto-algs.c) Add a non-installed library (librfc3961) and test program (test_rfc3961) which builds a minimal rfc3961 crypto library, and checks that it is usable.
104 lines
3.3 KiB
C
104 lines
3.3 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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int _krb5_AES_string_to_default_iterator = 4096;
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static krb5_error_code
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AES_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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uint32_t iter;
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struct encryption_type *et;
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struct key_data kd;
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if (opaque.length == 0)
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iter = _krb5_AES_string_to_default_iterator;
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else if (opaque.length == 4) {
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unsigned long v;
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_krb5_get_int(opaque.data, &v, 4);
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iter = ((uint32_t)v);
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} else
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return KRB5_PROG_KEYTYPE_NOSUPP; /* XXX */
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et = _krb5_find_enctype(enctype);
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if (et == NULL)
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return KRB5_PROG_KEYTYPE_NOSUPP;
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kd.schedule = NULL;
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ALLOC(kd.key, 1);
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if(kd.key == NULL) {
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krb5_set_error_message (context, ENOMEM, N_("malloc: out of memory", ""));
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return ENOMEM;
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}
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kd.key->keytype = enctype;
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ret = krb5_data_alloc(&kd.key->keyvalue, et->keytype->size);
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if (ret) {
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krb5_set_error_message (context, ret, N_("malloc: out of memory", ""));
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return ret;
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}
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ret = PKCS5_PBKDF2_HMAC_SHA1(password.data, password.length,
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salt.saltvalue.data, salt.saltvalue.length,
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iter,
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et->keytype->size, kd.key->keyvalue.data);
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if (ret != 1) {
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_krb5_free_key_data(context, &kd, et);
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krb5_set_error_message(context, KRB5_PROG_KEYTYPE_NOSUPP,
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"Error calculating s2k");
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return KRB5_PROG_KEYTYPE_NOSUPP;
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}
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ret = _krb5_derive_key(context, et, &kd, "kerberos", strlen("kerberos"));
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if (ret == 0)
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ret = krb5_copy_keyblock_contents(context, kd.key, key);
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_krb5_free_key_data(context, &kd, et);
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return ret;
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}
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struct salt_type _krb5_AES_salt[] = {
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{
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KRB5_PW_SALT,
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"pw-salt",
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AES_string_to_key
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},
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{ 0 }
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};
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