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crypto: move pub key to generic async completion

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public_key_verify_signature() is starting an async crypto op and
waiting for it to complete. Move it over to generic code doing
the same.

Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Gilad Ben-Yossef 2017-10-18 08:00:40 +01:00 committed by Herbert Xu
parent 2c3f8b1621
commit 0ca2a04ac3
1 changed files with 4 additions and 24 deletions
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28
crypto/asymmetric_keys/public_key.c
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@ -57,29 +57,13 @@ static void public_key_destroy(void *payload0, void *payload3)
public_key_signature_free(payload3);
}
struct public_key_completion {
struct completion completion;
int err;
};
static void public_key_verify_done(struct crypto_async_request *req, int err)
{
struct public_key_completion *compl = req->data;
if (err == -EINPROGRESS)
return;
compl->err = err;
complete(&compl->completion);
}
/*
* Verify a signature using a public key.
*/
int public_key_verify_signature(const struct public_key *pkey,
const struct public_key_signature *sig)
{
struct public_key_completion compl;
struct crypto_wait cwait;
struct crypto_akcipher *tfm;
struct akcipher_request *req;
struct scatterlist sig_sg, digest_sg;
@ -131,20 +115,16 @@ int public_key_verify_signature(const struct public_key *pkey,
sg_init_one(&digest_sg, output, outlen);
akcipher_request_set_crypt(req, &sig_sg, &digest_sg, sig->s_size,
outlen);
init_completion(&compl.completion);
crypto_init_wait(&cwait);
akcipher_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG |
CRYPTO_TFM_REQ_MAY_SLEEP,
public_key_verify_done, &compl);
crypto_req_done, &cwait);
/* Perform the verification calculation. This doesn't actually do the
* verification, but rather calculates the hash expected by the
* signature and returns that to us.
*/
ret = crypto_akcipher_verify(req);
if ((ret == -EINPROGRESS) || (ret == -EBUSY)) {
wait_for_completion(&compl.completion);
ret = compl.err;
}
ret = crypto_wait_req(crypto_akcipher_verify(req), &cwait);
if (ret < 0)
goto out_free_output;