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crypto: omap-sham - use crypto_shash_tfm_digest()

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Instead of manually allocating a 'struct shash_desc' on the stack and
calling crypto_shash_digest(), switch to using the new helper function
crypto_shash_tfm_digest() which does this for us.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Eric Biggers 2020-05-01 22:31:12 -07:00 committed by Herbert Xu
parent ce8e04888d
commit e29ba412bd
1 changed files with 4 additions and 16 deletions
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20
drivers/crypto/omap-sham.c
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@ -1245,16 +1245,6 @@ static int omap_sham_update(struct ahash_request *req)
return omap_sham_enqueue(req, OP_UPDATE);
}
static int omap_sham_shash_digest(struct crypto_shash *tfm, u32 flags,
const u8 *data, unsigned int len, u8 *out)
{
SHASH_DESC_ON_STACK(shash, tfm);
shash->tfm = tfm;
return crypto_shash_digest(shash, data, len, out);
}
static int omap_sham_final_shash(struct ahash_request *req)
{
struct omap_sham_ctx *tctx = crypto_tfm_ctx(req->base.tfm);
@ -1270,9 +1260,8 @@ static int omap_sham_final_shash(struct ahash_request *req)
!test_bit(FLAGS_AUTO_XOR, &ctx->dd->flags))
offset = get_block_size(ctx);
return omap_sham_shash_digest(tctx->fallback, req->base.flags,
ctx->buffer + offset,
ctx->bufcnt - offset, req->result);
return crypto_shash_tfm_digest(tctx->fallback, ctx->buffer + offset,
ctx->bufcnt - offset, req->result);
}
static int omap_sham_final(struct ahash_request *req)
@ -1351,9 +1340,8 @@ static int omap_sham_setkey(struct crypto_ahash *tfm, const u8 *key,
return err;
if (keylen > bs) {
err = omap_sham_shash_digest(bctx->shash,
crypto_shash_get_flags(bctx->shash),
key, keylen, bctx->ipad);
err = crypto_shash_tfm_digest(bctx->shash, key, keylen,
bctx->ipad);
if (err)
return err;
keylen = ds;