mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-25 21:54:06 +08:00
d7198ce46d
This patch adds a requirement to the generic 3DES implementation such that 2-key 3DES (K1 == K3) is no longer allowed in FIPS mode. We will also provide helpers that may be used by drivers that implement 3DES to make the same check. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
67 lines
1.4 KiB
C
67 lines
1.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* DES & Triple DES EDE Cipher Algorithms.
|
|
*/
|
|
|
|
#ifndef __CRYPTO_DES_H
|
|
#define __CRYPTO_DES_H
|
|
|
|
#include <crypto/skcipher.h>
|
|
#include <linux/compiler.h>
|
|
#include <linux/fips.h>
|
|
#include <linux/string.h>
|
|
|
|
#define DES_KEY_SIZE 8
|
|
#define DES_EXPKEY_WORDS 32
|
|
#define DES_BLOCK_SIZE 8
|
|
|
|
#define DES3_EDE_KEY_SIZE (3 * DES_KEY_SIZE)
|
|
#define DES3_EDE_EXPKEY_WORDS (3 * DES_EXPKEY_WORDS)
|
|
#define DES3_EDE_BLOCK_SIZE DES_BLOCK_SIZE
|
|
|
|
static inline int __des3_verify_key(u32 *flags, const u8 *key)
|
|
{
|
|
int err = -EINVAL;
|
|
u32 K[6];
|
|
|
|
memcpy(K, key, DES3_EDE_KEY_SIZE);
|
|
|
|
if (unlikely(!((K[0] ^ K[2]) | (K[1] ^ K[3])) ||
|
|
!((K[2] ^ K[4]) | (K[3] ^ K[5]))) &&
|
|
(fips_enabled ||
|
|
(*flags & CRYPTO_TFM_REQ_FORBID_WEAK_KEYS)))
|
|
goto bad;
|
|
|
|
if (unlikely(!((K[0] ^ K[4]) | (K[1] ^ K[5]))) && fips_enabled)
|
|
goto bad;
|
|
|
|
err = 0;
|
|
|
|
out:
|
|
memzero_explicit(K, DES3_EDE_KEY_SIZE);
|
|
|
|
return err;
|
|
|
|
bad:
|
|
*flags |= CRYPTO_TFM_RES_WEAK_KEY;
|
|
goto out;
|
|
}
|
|
|
|
static inline int des3_verify_key(struct crypto_skcipher *tfm, const u8 *key)
|
|
{
|
|
u32 flags;
|
|
int err;
|
|
|
|
flags = crypto_skcipher_get_flags(tfm);
|
|
err = __des3_verify_key(&flags, key);
|
|
crypto_skcipher_set_flags(tfm, flags);
|
|
return err;
|
|
}
|
|
|
|
extern unsigned long des_ekey(u32 *pe, const u8 *k);
|
|
|
|
extern int __des3_ede_setkey(u32 *expkey, u32 *flags, const u8 *key,
|
|
unsigned int keylen);
|
|
|
|
#endif /* __CRYPTO_DES_H */
|