From 1ba34e71e9e56ac29a52e0d42b6290f3dc5bfd90 Mon Sep 17 00:00:00 2001 From: Christophe Leroy Date: Tue, 21 May 2019 13:34:10 +0000 Subject: [PATCH] crypto: talitos - check AES key size Although the HW accepts any size and silently truncates it to the correct length, the extra tests expects EINVAL to be returned when the key size is not valid. Signed-off-by: Christophe Leroy Fixes: 4de9d0b547b9 ("crypto: talitos - Add ablkcipher algorithms") Signed-off-by: Herbert Xu --- drivers/crypto/talitos.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/drivers/crypto/talitos.c b/drivers/crypto/talitos.c index 6312f8d..95f71e1 100644 --- a/drivers/crypto/talitos.c +++ b/drivers/crypto/talitos.c @@ -1622,6 +1622,18 @@ static int ablkcipher_des3_setkey(struct crypto_ablkcipher *cipher, return ablkcipher_setkey(cipher, key, keylen); } +static int ablkcipher_aes_setkey(struct crypto_ablkcipher *cipher, + const u8 *key, unsigned int keylen) +{ + if (keylen == AES_KEYSIZE_128 || keylen == AES_KEYSIZE_192 || + keylen == AES_KEYSIZE_256) + return ablkcipher_setkey(cipher, key, keylen); + + crypto_ablkcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN); + + return -EINVAL; +} + static void common_nonsnoop_unmap(struct device *dev, struct talitos_edesc *edesc, struct ablkcipher_request *areq) @@ -2782,6 +2794,7 @@ static struct talitos_alg_template driver_algs[] = { .min_keysize = AES_MIN_KEY_SIZE, .max_keysize = AES_MAX_KEY_SIZE, .ivsize = AES_BLOCK_SIZE, + .setkey = ablkcipher_aes_setkey, } }, .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU | @@ -2798,6 +2811,7 @@ static struct talitos_alg_template driver_algs[] = { .min_keysize = AES_MIN_KEY_SIZE, .max_keysize = AES_MAX_KEY_SIZE, .ivsize = AES_BLOCK_SIZE, + .setkey = ablkcipher_aes_setkey, } }, .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU | @@ -2815,6 +2829,7 @@ static struct talitos_alg_template driver_algs[] = { .min_keysize = AES_MIN_KEY_SIZE, .max_keysize = AES_MAX_KEY_SIZE, .ivsize = AES_BLOCK_SIZE, + .setkey = ablkcipher_aes_setkey, } }, .desc_hdr_template = DESC_HDR_TYPE_AESU_CTR_NONSNOOP | -- 2.7.4