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crypto: sparc - Forbid 2-key 3DES in FIPS mode

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This patch forbids the use of 2-key 3DES (K1 == K3) in FIPS mode.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu 2019-04-11 16:50:58 +08:00
parent 55902d8514
commit eee25da50b
1 changed files with 4 additions and 7 deletions
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11
arch/sparc/crypto/des_glue.c
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@ -201,18 +201,15 @@ static int des3_ede_set_key(struct crypto_tfm *tfm, const u8 *key,
unsigned int keylen)
{
struct des3_ede_sparc64_ctx *dctx = crypto_tfm_ctx(tfm);
const u32 *K = (const u32 *)key;
u32 *flags = &tfm->crt_flags;
u64 k1[DES_EXPKEY_WORDS / 2];
u64 k2[DES_EXPKEY_WORDS / 2];
u64 k3[DES_EXPKEY_WORDS / 2];
int err;
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;
des_sparc64_key_expand((const u32 *)key, k1);
key += DES_KEY_SIZE;