Commit e4fffa5f authored by Herbert Xu's avatar Herbert Xu
Browse files

crypto: n2 - Forbid 2-key 3DES in FIPS mode 



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

Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent cc4bd9f2

drivers/crypto/n2_core.c

+9 −4
Original line number Diff line number Diff line
@@ -788,13 +788,18 @@ static int n2_3des_setkey(struct crypto_ablkcipher *cipher, const u8 *key, 
	struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher);

	struct n2_cipher_context *ctx = crypto_tfm_ctx(tfm);

	struct n2_cipher_alg *n2alg = n2_cipher_alg(tfm);

	u32 flags;

	int err;



	flags = crypto_ablkcipher_get_flags(cipher);

	err = __des3_verify_key(&flags, key);

	if (unlikely(err)) {

		crypto_ablkcipher_set_flags(cipher, flags);

		return err;

	}



	ctx->enc_type = n2alg->enc_type;



	if (keylen != (3 * DES_KEY_SIZE)) {

		crypto_ablkcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN);

		return -EINVAL;

	}

	ctx->key_len = keylen;

	memcpy(ctx->key.des3, key, keylen);

	return 0;