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eng_devcrypto: make sure digest can do copy

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Digest must be able to do partial-state copy to be used.

Signed-off-by: Eneas U de Queiroz <cote2004-github@yahoo.com>

Reviewed-by: Matthias St. Pierre <Matthias.St.Pierre@ncp-e.com>
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/7585)
This commit is contained in:
Eneas U de Queiroz 2018-12-08 18:01:04 -02:00 committed by Richard Levitte
parent b5015e834a
commit 16e252a01b
1 changed files with 26 additions and 8 deletions
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34
crypto/engine/eng_devcrypto.c
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@ -601,6 +601,30 @@ static int digest_cleanup(EVP_MD_CTX *ctx)
return 1;
}
static int devcrypto_test_digest(size_t digest_data_index)
{
struct session_op sess1, sess2;
struct cphash_op cphash;
int ret=0;
memset(&sess1, 0, sizeof(sess1));
memset(&sess2, 0, sizeof(sess2));
sess1.mac = digest_data[digest_data_index].devcryptoid;
if (ioctl(cfd, CIOCGSESSION, &sess1) < 0)
return 0;
/* Make sure the driver is capable of hash state copy */
sess2.mac = sess1.mac;
if (ioctl(cfd, CIOCGSESSION, &sess2) >= 0) {
cphash.src_ses = sess1.ses;
cphash.dst_ses = sess2.ses;
if (ioctl(cfd, CIOCCPHASH, &cphash) >= 0)
ret = 1;
ioctl(cfd, CIOCFSESSION, &sess2.ses);
}
ioctl(cfd, CIOCFSESSION, &sess1.ses);
return ret;
}
/*
* Keep a table of known nids and associated methods.
* Note that known_digest_nids[] isn't necessarily indexed the same way as
@ -613,20 +637,14 @@ static EVP_MD *known_digest_methods[OSSL_NELEM(digest_data)] = { NULL, };
static void prepare_digest_methods(void)
{
size_t i;
struct session_op sess;
memset(&sess, 0, sizeof(sess));
for (i = 0, known_digest_nids_amount = 0; i < OSSL_NELEM(digest_data);
i++) {
/*
* Check that the algo is really availably by trying to open and close
* a session.
* Check that the algo is usable
*/
sess.mac = digest_data[i].devcryptoid;
if (ioctl(cfd, CIOCGSESSION, &sess) < 0
|| ioctl(cfd, CIOCFSESSION, &sess.ses) < 0)
if (!devcrypto_test_digest(i))
continue;
if ((known_digest_methods[i] = EVP_MD_meth_new(digest_data[i].nid,