From 488521d77fdc1de5ae256ce0d9203e35ebc92993 Mon Sep 17 00:00:00 2001 From: Eneas U de Queiroz Date: Sat, 8 Dec 2018 18:01:04 -0200 Subject: [PATCH 7/7] eng_devcrypto: make sure digest can do copy Digest must be able to do partial-state copy to be used. Signed-off-by: Eneas U de Queiroz Reviewed-by: Matthias St. Pierre Reviewed-by: Richard Levitte (Merged from https://github.com/openssl/openssl/pull/7585) (cherry picked from commit 16e252a01b754a13e83d5e5e87afbe389997926b) --- a/crypto/engine/eng_devcrypto.c +++ b/crypto/engine/eng_devcrypto.c @@ -601,6 +601,30 @@ static int digest_cleanup(EVP_MD_CTX *ct 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 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,