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crypto: s5p-sss - 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.

Cc: Krzysztof Kozlowski <krzk@kernel.org>
Cc: Vladimir Zapolskiy <vz@mleia.com>
Cc: Kamil Konieczny <k.konieczny@samsung.com>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Acked-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Eric Biggers 2020-05-01 22:31:13 -07:00 committed by Herbert Xu
parent e29ba412bd
commit ecca1ad60c
1 changed files with 6 additions and 33 deletions
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39
drivers/crypto/s5p-sss.c
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@ -1520,37 +1520,6 @@ static int s5p_hash_update(struct ahash_request *req)
return s5p_hash_enqueue(req, true); /* HASH_OP_UPDATE */
}
/**
* s5p_hash_shash_digest() - calculate shash digest
* @tfm: crypto transformation
* @flags: tfm flags
* @data: input data
* @len: length of data
* @out: output buffer
*/
static int s5p_hash_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);
}
/**
* s5p_hash_final_shash() - calculate shash digest
* @req: AHASH request
*/
static int s5p_hash_final_shash(struct ahash_request *req)
{
struct s5p_hash_ctx *tctx = crypto_tfm_ctx(req->base.tfm);
struct s5p_hash_reqctx *ctx = ahash_request_ctx(req);
return s5p_hash_shash_digest(tctx->fallback, req->base.flags,
ctx->buffer, ctx->bufcnt, req->result);
}
/**
* s5p_hash_final() - close up hash and calculate digest
* @req: AHASH request
@ -1582,8 +1551,12 @@ static int s5p_hash_final(struct ahash_request *req)
if (ctx->error)
return -EINVAL; /* uncompleted hash is not needed */
if (!ctx->digcnt && ctx->bufcnt < BUFLEN)
return s5p_hash_final_shash(req);
if (!ctx->digcnt && ctx->bufcnt < BUFLEN) {
struct s5p_hash_ctx *tctx = crypto_tfm_ctx(req->base.tfm);
return crypto_shash_tfm_digest(tctx->fallback, ctx->buffer,
ctx->bufcnt, req->result);
}
return s5p_hash_enqueue(req, false); /* HASH_OP_FINAL */
}