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/*
Unix SMB/CIFS implementation.
Kerberos utility functions
Copyright (C) Andrew Bartlett <abartlet@samba.org> 2004-2012
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "krb5_samba.h"
#include "librpc/gen_ndr/netlogon.h"
const krb5_enctype *samba_all_enctypes(void)
{
/* TODO: Find a way not to have to use a fixed list */
static const krb5_enctype enctypes[] = {
ENCTYPE_DES_CBC_CRC,
ENCTYPE_DES_CBC_MD5,
ENCTYPE_AES128_CTS_HMAC_SHA1_96,
ENCTYPE_AES256_CTS_HMAC_SHA1_96,
ENCTYPE_ARCFOUR_HMAC,
0
};
return enctypes;
};
/* Translate between the IETF encryption type values and the Microsoft
* msDS-SupportedEncryptionTypes values */
uint32_t kerberos_enctype_to_bitmap(krb5_enctype enc_type_enum)
{
switch (enc_type_enum) {
case ENCTYPE_DES_CBC_CRC:
return ENC_CRC32;
case ENCTYPE_DES_CBC_MD5:
return ENC_RSA_MD5;
case ENCTYPE_ARCFOUR_HMAC:
return ENC_RC4_HMAC_MD5;
case ENCTYPE_AES128_CTS_HMAC_SHA1_96:
return ENC_HMAC_SHA1_96_AES128;
case ENCTYPE_AES256_CTS_HMAC_SHA1_96:
return ENC_HMAC_SHA1_96_AES256;
default:
return 0;
}
}
/* Translate between the Microsoft msDS-SupportedEncryptionTypes values
* and the IETF encryption type values */
krb5_enctype ms_suptype_to_ietf_enctype(uint32_t enctype_bitmap)
{
switch (enctype_bitmap) {
case ENC_CRC32:
return ENCTYPE_DES_CBC_CRC;
case ENC_RSA_MD5:
return ENCTYPE_DES_CBC_MD5;
case ENC_RC4_HMAC_MD5:
return ENCTYPE_ARCFOUR_HMAC;
case ENC_HMAC_SHA1_96_AES128:
return ENCTYPE_AES128_CTS_HMAC_SHA1_96;
case ENC_HMAC_SHA1_96_AES256:
return ENCTYPE_AES256_CTS_HMAC_SHA1_96;
default:
return 0;
}
}
/* Return an array of krb5_enctype values */
krb5_error_code ms_suptypes_to_ietf_enctypes(TALLOC_CTX *mem_ctx,
uint32_t enctype_bitmap,
krb5_enctype **enctypes)
{
size_t max_bits = 8 * sizeof(enctype_bitmap);
size_t j = 0;
ssize_t i;
*enctypes = talloc_zero_array(mem_ctx, krb5_enctype,
max_bits + 1);
if (!*enctypes) {
return ENOMEM;
}
for (i = max_bits - 1; i >= 0; i--) {
uint32_t bit_value = (1U << i) & enctype_bitmap;
if (bit_value & enctype_bitmap) {
(*enctypes)[j] = ms_suptype_to_ietf_enctype(bit_value);
if (!(*enctypes)[j]) {
continue;
}
j++;
}
}
(*enctypes)[j] = 0;
return 0;
}
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