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crypto: aead - Add chunk size

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This patch adds a chunk size parameter to aead algorithms, just
like the chunk size for skcipher algorithms.

However, unlike skcipher we do not currently export this to AEAD
users.  It is only meant to be used by AEAD implementors for now.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu
2016-07-12 13:17:33 +08:00
parent a0129733a3
commit 7a530aa9cf
3 changed files with 33 additions and 6 deletions
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crypto/aead.c
+5 -1
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@@ -346,9 +346,13 @@ static int aead_prepare_alg(struct aead_alg *alg)
{
struct crypto_alg *base = &alg->base;
if (max(alg->maxauthsize, alg->ivsize) > PAGE_SIZE / 8)
if (max3(alg->maxauthsize, alg->ivsize, alg->chunksize) >
PAGE_SIZE / 8)
return -EINVAL;
if (!alg->chunksize)
alg->chunksize = base->cra_blocksize;
base->cra_type = &crypto_aead_type;
base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
base->cra_flags |= CRYPTO_ALG_TYPE_AEAD;