diff options
Diffstat (limited to 'drivers/crypto/ccp/ccp-crypto-des3.c')
| -rw-r--r-- | drivers/crypto/ccp/ccp-crypto-des3.c | 26 |
1 files changed, 5 insertions, 21 deletions
diff --git a/drivers/crypto/ccp/ccp-crypto-des3.c b/drivers/crypto/ccp/ccp-crypto-des3.c index c2ff551d215b..5f05f834c7cd 100644 --- a/drivers/crypto/ccp/ccp-crypto-des3.c +++ b/drivers/crypto/ccp/ccp-crypto-des3.c @@ -1,13 +1,10 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * AMD Cryptographic Coprocessor (CCP) DES3 crypto API support * * Copyright (C) 2016,2017 Advanced Micro Devices, Inc. * * Author: Gary R Hook <ghook@amd.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. */ #include <linux/module.h> @@ -43,24 +40,11 @@ static int ccp_des3_setkey(struct crypto_ablkcipher *tfm, const u8 *key, struct ccp_crypto_ablkcipher_alg *alg = ccp_crypto_ablkcipher_alg(crypto_ablkcipher_tfm(tfm)); u32 *flags = &tfm->base.crt_flags; + int err; - - /* From des_generic.c: - * - * RFC2451: - * If the first two or last two independent 64-bit keys are - * equal (k1 == k2 or k2 == k3), then the DES3 operation is simply the - * same as DES. Implementers MUST reject keys that exhibit this - * property. - */ - const u32 *K = (const u32 *)key; - - if (unlikely(!((K[0] ^ K[2]) | (K[1] ^ K[3])) || - !((K[2] ^ K[4]) | (K[3] ^ K[5]))) && - (*flags & CRYPTO_TFM_REQ_FORBID_WEAK_KEYS)) { - *flags |= CRYPTO_TFM_RES_WEAK_KEY; - return -EINVAL; - } + err = __des3_verify_key(flags, key); + if (unlikely(err)) + return err; /* It's not clear that there is any support for a keysize of 112. * If needed, the caller should make K1 == K3 |