Function ossl_process

freebsd/crypto/openssl/ossl.c:199–270

}

static int
ossl_process(device_t dev, struct cryptop *crp, int hint)
{
	struct ossl_hash_context ctx;
	char digest[HASH_MAX_LEN];
	const struct crypto_session_params *csp;
	struct ossl_session *s;
	struct auth_hash *axf;
	int error;
	bool fpu_entered;

	s = crypto_get_driver_session(crp->crp_session);
	csp = crypto_get_params(crp->crp_session);
	axf = s->hash.axf;

	if (is_fpu_kern_thread(0)) {
		fpu_entered = false;
	} else {
		fpu_kern_enter(curthread, NULL, FPU_KERN_NOCTX);
		fpu_entered = true;
	}

	if (crp->crp_auth_key != NULL)
		ossl_setkey_hmac(s, crp->crp_auth_key, csp->csp_auth_klen);

	ctx = s->hash.ictx;

	if (crp->crp_aad != NULL)
		error = axf->Update(&ctx, crp->crp_aad, crp->crp_aad_length);
	else
		error = crypto_apply(crp, crp->crp_aad_start,
		    crp->crp_aad_length, axf->Update, &ctx);
	if (error)
		goto out;

	error = crypto_apply(crp, crp->crp_payload_start,
	    crp->crp_payload_length, axf->Update, &ctx);
	if (error)
		goto out;

	axf->Final(digest, &ctx);

	if (csp->csp_auth_klen != 0) {
		ctx = s->hash.octx;
		axf->Update(&ctx, digest, axf->hashsize);
		axf->Final(digest, &ctx);
	}

	if (crp->crp_op & CRYPTO_OP_VERIFY_DIGEST) {
		char digest2[HASH_MAX_LEN];

		crypto_copydata(crp, crp->crp_digest_start, s->hash.mlen,
		    digest2);
		if (timingsafe_bcmp(digest, digest2, s->hash.mlen) != 0)
			error = EBADMSG;
		explicit_bzero(digest2, sizeof(digest2));
	} else {
		crypto_copyback(crp, crp->crp_digest_start, s->hash.mlen,