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crypto: atmel-sha - fix error handling when setting hmac key 

HMAC keys can be of any length, and atmel_sha_hmac_key_set() can only
fail due to -ENOMEM.  But atmel_sha_hmac_setkey() incorrectly treated
any error as a "bad key length" error.  Fix it to correctly propagate
the -ENOMEM error code and not set any tfm result flags.

Fixes: 81d8750b2b ("crypto: atmel-sha - add support to hmac(shaX)")
Cc: Nicolas Ferre <nicolas.ferre@microchip.com>
Cc: Alexandre Belloni <alexandre.belloni@bootlin.com>
Cc: Ludovic Desroches <ludovic.desroches@microchip.com>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Reviewed-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Eric Biggers 2019-12-30 21:19:33 -06:00 committed by Herbert Xu
parent b828f90590
commit b529f1983b
1 changed files with 1 additions and 6 deletions
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7
drivers/crypto/atmel-sha.c
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@ -1853,12 +1853,7 @@ static int atmel_sha_hmac_setkey(struct crypto_ahash *tfm, const u8 *key,
{
struct atmel_sha_hmac_ctx *hmac = crypto_ahash_ctx(tfm);
if (atmel_sha_hmac_key_set(&hmac->hkey, key, keylen)) {
crypto_ahash_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
return -EINVAL;
}
return 0;
return atmel_sha_hmac_key_set(&hmac->hkey, key, keylen);
}
static int atmel_sha_hmac_init(struct ahash_request *req)