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crypto: aes - helper function to validate key length for AES algorithms

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Add inline helper function to check key length for AES algorithms.
The key can be 128, 192 or 256 bits size.
This function is used in the generic aes implementation.

Signed-off-by: Iuliana Prodan <iuliana.prodan@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Iuliana Prodan
2019-07-31 16:05:55 +03:00
committed by Herbert Xu
parent 65526f638e
commit bc67d04e75
2 changed files with 21 additions and 4 deletions
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8
lib/crypto/aes.c
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@@ -187,11 +187,11 @@ int aes_expandkey(struct crypto_aes_ctx *ctx, const u8 *in_key,
{
u32 kwords = key_len / sizeof(u32);
u32 rc, i, j;
int err;
if (key_len != AES_KEYSIZE_128 &&
key_len != AES_KEYSIZE_192 &&
key_len != AES_KEYSIZE_256)
return -EINVAL;
err = aes_check_keylen(key_len);
if (err)
return err;
ctx->key_length = key_len;