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lib/crypto: Remove unused RC4 code from Samba

Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
This commit is contained in:
Andrew Bartlett 2019-08-15 14:23:35 +12:00 committed by Andreas Schneider
parent 2d54559aad
commit e9859ad356
3 changed files with 0 additions and 119 deletions

@ -1,93 +0,0 @@
/*
Unix SMB/CIFS implementation.
An implementation of the arcfour algorithm
Copyright (C) Andrew Tridgell 1998
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 "replace.h"
#include "../lib/crypto/arcfour.h"
/* initialise the arcfour sbox with key */
_PUBLIC_ void arcfour_init(struct arcfour_state *state, const DATA_BLOB *key)
{
size_t ind;
uint8_t j = 0;
for (ind = 0; ind < sizeof(state->sbox); ind++) {
state->sbox[ind] = (uint8_t)ind;
}
for (ind = 0; ind < sizeof(state->sbox); ind++) {
uint8_t tc;
j += (state->sbox[ind] + key->data[ind%key->length]);
tc = state->sbox[ind];
state->sbox[ind] = state->sbox[j];
state->sbox[j] = tc;
}
state->index_i = 0;
state->index_j = 0;
}
/* crypt the data with arcfour */
_PUBLIC_ void arcfour_crypt_sbox(struct arcfour_state *state, uint8_t *data,
int len)
{
int ind;
for (ind = 0; ind < len; ind++) {
uint8_t tc;
uint8_t t;
state->index_i++;
state->index_j += state->sbox[state->index_i];
tc = state->sbox[state->index_i];
state->sbox[state->index_i] = state->sbox[state->index_j];
state->sbox[state->index_j] = tc;
t = state->sbox[state->index_i] + state->sbox[state->index_j];
data[ind] = data[ind] ^ state->sbox[t];
}
}
/*
arcfour encryption with a blob key
*/
_PUBLIC_ void arcfour_crypt_blob(uint8_t *data, int len, const DATA_BLOB *key)
{
struct arcfour_state state;
arcfour_init(&state, key);
arcfour_crypt_sbox(&state, data, len);
}
/*
a variant that assumes a 16 byte key. This should be removed
when the last user is gone
*/
_PUBLIC_ void arcfour_crypt(uint8_t *data, const uint8_t keystr[16], int len)
{
uint8_t keycopy[16];
DATA_BLOB key = { .data = keycopy, .length = sizeof(keycopy) };
memcpy(keycopy, keystr, sizeof(keycopy));
arcfour_crypt_blob(data, len, &key);
}

@ -1,17 +0,0 @@
#ifndef ARCFOUR_HEADER_H
#define ARCFOUR_HEADER_H
#include "../lib/util/data_blob.h"
struct arcfour_state {
uint8_t sbox[256];
uint8_t index_i;
uint8_t index_j;
};
void arcfour_init(struct arcfour_state *state, const DATA_BLOB *key);
void arcfour_crypt_sbox(struct arcfour_state *state, uint8_t *data, int len);
void arcfour_crypt_blob(uint8_t *data, int len, const DATA_BLOB *key);
void arcfour_crypt(uint8_t *data, const uint8_t keystr[16], int len);
#endif /* ARCFOUR_HEADER_H */

@ -12,14 +12,6 @@ bld.SAMBA_SUBSYSTEM('GNUTLS_HELPERS',
''',
deps='gnutls samba-errors');
# We have a GnuTLS DCEPRC backupkey implementation for the server and the test.
# However this is only working with GnuTLS >= 3.4.7. So we need to keep this
# around till we can require at least GnuTLS in a newer version.
bld.SAMBA_SUBSYSTEM('LIBCRYPTO_RC4',
source='arcfour.c',
deps='talloc',
enabled=not bld.CONFIG_SET('HAVE_GNUTLS_3_4_7'))
bld.SAMBA_SUBSYSTEM('LIBCRYPTO_AES_CCM',
source='aes_ccm_128.c',
deps='talloc')
@ -42,7 +34,6 @@ bld.SAMBA_SUBSYSTEM('LIBCRYPTO',
''',
deps='''
talloc
LIBCRYPTO_RC4
LIBCRYPTO_AES
LIBCRYPTO_AES_CCM
LIBCRYPTO_AES_GCM