[PATCH 13/24] crypto: inside-secure - Forbid 2-key 3DES in FIPS mode

From: Herbert Xu <herbert@gondor.apana.org.au>
To: Linux Crypto Mailing List <linux-crypto@vger.kernel.org>
Subject: [PATCH 13/24] crypto: inside-secure - Forbid 2-key 3DES in FIPS mode
Date: Thu, 11 Apr 2019 16:51:10 +0800	[thread overview]
Message-ID: <E1hEVQM-0006nK-0d@gondobar> (raw)
In-Reply-To: 20190411084707.h56mz2z7jxusnr7u@gondor.apana.org.au

This patch forbids the use of 2-key 3DES (K1 == K3) in FIPS mode.
   
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
---

 drivers/crypto/inside-secure/safexcel_cipher.c |   11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/drivers/crypto/inside-secure/safexcel_cipher.c b/drivers/crypto/inside-secure/safexcel_cipher.c
index 7ef30a98cb24..de4be10b172f 100644
--- a/drivers/crypto/inside-secure/safexcel_cipher.c
+++ b/drivers/crypto/inside-secure/safexcel_cipher.c
@@ -1039,13 +1039,12 @@ static int safexcel_cbc_des3_ede_decrypt(struct skcipher_request *req)
 static int safexcel_des3_ede_setkey(struct crypto_skcipher *ctfm,
 				   const u8 *key, unsigned int len)
 {
-	struct crypto_tfm *tfm = crypto_skcipher_tfm(ctfm);
-	struct safexcel_cipher_ctx *ctx = crypto_tfm_ctx(tfm);
+	struct safexcel_cipher_ctx *ctx = crypto_skcipher_ctx(ctfm);
+	int err;
 
-	if (len != DES3_EDE_KEY_SIZE) {
-		crypto_skcipher_set_flags(ctfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
-		return -EINVAL;
-	}
+	err = des3_verify_key(ctfm, key);
+	if (unlikely(err))
+		return err;
 
 	/* if context exits and key changed, need to invalidate it */
 	if (ctx->base.ctxr_dma) {
