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Subject[PATCH 3.10 030/139] crypto: talitos - Extend max key length for SHA384/512-HMAC and AEAD
Date
From: Martin Hicks <mort@bork.org>

commit 03d2c5114c95797c0aa7d9f463348b171a274fd4 upstream.

An updated patch that also handles the additional key length requirements
for the AEAD algorithms.

The max keysize is not 96. For SHA384/512 it's 128, and for the AEAD
algorithms it's longer still. Extend the max keysize for the
AEAD size for AES256 + HMAC(SHA512).

Cc: <stable@vger.kernel.org>
Fixes: 357fb60502ede ("crypto: talitos - add sha224, sha384 and sha512 to existing AEAD algorithms")
Signed-off-by: Martin Hicks <mort@bork.org>
Acked-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Willy Tarreau <w@1wt.eu>
---
drivers/crypto/talitos.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/crypto/talitos.c b/drivers/crypto/talitos.c
index 057d894..6e5ba44 100644
--- a/drivers/crypto/talitos.c
+++ b/drivers/crypto/talitos.c
@@ -623,7 +623,7 @@ static void talitos_unregister_rng(struct device *dev)
* crypto alg
*/
#define TALITOS_CRA_PRIORITY 3000
-#define TALITOS_MAX_KEY_SIZE 96
+#define TALITOS_MAX_KEY_SIZE (AES_MAX_KEY_SIZE + SHA512_BLOCK_SIZE)
#define TALITOS_MAX_IV_LENGTH 16 /* max of AES_BLOCK_SIZE, DES3_EDE_BLOCK_SIZE */

#define MD5_BLOCK_SIZE 64
@@ -1380,6 +1380,11 @@ static int ablkcipher_setkey(struct crypto_ablkcipher *cipher,
{
struct talitos_ctx *ctx = crypto_ablkcipher_ctx(cipher);

+ if (keylen > TALITOS_MAX_KEY_SIZE) {
+ crypto_ablkcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN);
+ return -EINVAL;
+ }
+
memcpy(&ctx->key, key, keylen);
ctx->keylen = keylen;

--
2.8.0.rc2.1.gbe9624a
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