2015-07-01 20:10:32 +03:00
|
|
|
/*
|
|
|
|
* QEMU Crypto cipher algorithms
|
|
|
|
*
|
|
|
|
* Copyright (c) 2015 Red Hat, Inc.
|
|
|
|
*
|
|
|
|
* This library is free software; you can redistribute it and/or
|
|
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
|
|
* License as published by the Free Software Foundation; either
|
|
|
|
* version 2 of the License, or (at your option) any later version.
|
|
|
|
*
|
|
|
|
* This library 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
|
|
|
|
* Lesser General Public License for more details.
|
|
|
|
*
|
|
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
|
|
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include "crypto/cipher.h"
|
|
|
|
|
2015-07-01 20:10:33 +03:00
|
|
|
|
2015-07-01 20:10:32 +03:00
|
|
|
static size_t alg_key_len[QCRYPTO_CIPHER_ALG_LAST] = {
|
|
|
|
[QCRYPTO_CIPHER_ALG_AES_128] = 16,
|
|
|
|
[QCRYPTO_CIPHER_ALG_AES_192] = 24,
|
|
|
|
[QCRYPTO_CIPHER_ALG_AES_256] = 32,
|
|
|
|
[QCRYPTO_CIPHER_ALG_DES_RFB] = 8,
|
|
|
|
};
|
|
|
|
|
|
|
|
static bool
|
|
|
|
qcrypto_cipher_validate_key_length(QCryptoCipherAlgorithm alg,
|
|
|
|
size_t nkey,
|
|
|
|
Error **errp)
|
|
|
|
{
|
|
|
|
if ((unsigned)alg >= QCRYPTO_CIPHER_ALG_LAST) {
|
|
|
|
error_setg(errp, "Cipher algorithm %d out of range",
|
|
|
|
alg);
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (alg_key_len[alg] != nkey) {
|
|
|
|
error_setg(errp, "Cipher key length %zu should be %zu",
|
|
|
|
alg_key_len[alg], nkey);
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
|
2015-10-16 18:36:53 +03:00
|
|
|
#if defined(CONFIG_GCRYPT) || defined(CONFIG_NETTLE)
|
2015-07-01 20:10:33 +03:00
|
|
|
static uint8_t *
|
|
|
|
qcrypto_cipher_munge_des_rfb_key(const uint8_t *key,
|
|
|
|
size_t nkey)
|
|
|
|
{
|
|
|
|
uint8_t *ret = g_new0(uint8_t, nkey);
|
|
|
|
size_t i;
|
|
|
|
for (i = 0; i < nkey; i++) {
|
|
|
|
uint8_t r = key[i];
|
|
|
|
r = (r & 0xf0) >> 4 | (r & 0x0f) << 4;
|
|
|
|
r = (r & 0xcc) >> 2 | (r & 0x33) << 2;
|
|
|
|
r = (r & 0xaa) >> 1 | (r & 0x55) << 1;
|
|
|
|
ret[i] = r;
|
|
|
|
}
|
|
|
|
return ret;
|
|
|
|
}
|
2015-10-16 18:36:53 +03:00
|
|
|
#endif /* CONFIG_GCRYPT || CONFIG_NETTLE */
|
2015-07-01 20:10:33 +03:00
|
|
|
|
2015-10-16 18:36:53 +03:00
|
|
|
#ifdef CONFIG_GCRYPT
|
2015-07-01 20:10:33 +03:00
|
|
|
#include "crypto/cipher-gcrypt.c"
|
2015-10-16 18:36:53 +03:00
|
|
|
#elif defined CONFIG_NETTLE
|
2015-07-01 20:10:34 +03:00
|
|
|
#include "crypto/cipher-nettle.c"
|
2015-07-01 20:10:33 +03:00
|
|
|
#else
|
2015-07-01 20:10:32 +03:00
|
|
|
#include "crypto/cipher-builtin.c"
|
2015-07-01 20:10:33 +03:00
|
|
|
#endif
|