From 05336437fade6f9bff26ad3b106348c08326b543 Mon Sep 17 00:00:00 2001
From: Theo de Raadt <deraadt@cvs.openbsd.org>
Date: Tue, 23 Apr 2002 22:20:48 +0000
Subject: initial hack at a CIOCSYMFEAT ioctl

---
 sys/crypto/crypto.c    | 31 ++++++++++++++++++++++++++++++-
 sys/crypto/cryptodev.c |  5 ++++-
 sys/crypto/cryptodev.h |  3 ++-
 3 files changed, 36 insertions(+), 3 deletions(-)

diff --git a/sys/crypto/crypto.c b/sys/crypto/crypto.c
index 12261990d81..a599b08e364 100644
--- a/sys/crypto/crypto.c
+++ b/sys/crypto/crypto.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: crypto.c,v 1.34 2002/04/23 19:13:04 deraadt Exp $	*/
+/*	$OpenBSD: crypto.c,v 1.35 2002/04/23 22:20:47 deraadt Exp $	*/
 /*
  * The author of this code is Angelos D. Keromytis (angelos@cis.upenn.edu)
  *
@@ -589,3 +589,32 @@ crypto_kdone(struct cryptkop *krp)
 {
 	krp->krp_callback(krp);
 }
+
+int
+crypto_getfeat(int *featp)
+{
+	int kalgs[CRK_ALGORITHM_MAX];
+	extern int cryptodevallowsoft;
+	int hid, kalg, feat = 0;
+
+	for (hid = 0; hid < crypto_drivers_num; hid++) {
+		if ((crypto_drivers[hid].cc_flags & CRYPTOCAP_F_SOFTWARE) &&
+		    cryptodevallowsoft == 0)
+			continue;
+		if (crypto_drivers[hid].cc_kprocess == NULL)
+			continue;
+		for (kalg = 0; kalg < CRK_ALGORITHM_MAX; kalg++)
+			if ((crypto_drivers[hid].cc_kalg[kalg] &
+			    CRYPTO_ALG_FLAG_SUPPORTED) == 0)
+				kalgs[kalg] = 1;
+	}
+
+	if (kalgs[CRK_MOD_EXP] && kalgs[CRK_MOD_EXP_CRT])
+		feat |= CRSFEAT_RSA;
+	if (kalgs[CRK_DSA_VERIFY] && kalgs[CRK_DSA_SIGN])
+		feat |= CRSFEAT_DSA;
+	if (kalgs[CRK_DH_COMPUTE_KEY] && kalgs[CRK_MOD_EXP])
+		feat |= CRSFEAT_DH;
+	*featp = feat;
+	return (0);
+}
diff --git a/sys/crypto/cryptodev.c b/sys/crypto/cryptodev.c
index 3031f6a63a5..fc39f6f83a1 100644
--- a/sys/crypto/cryptodev.c
+++ b/sys/crypto/cryptodev.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: cryptodev.c,v 1.37 2002/04/23 19:13:04 deraadt Exp $	*/
+/*	$OpenBSD: cryptodev.c,v 1.38 2002/04/23 22:20:47 deraadt Exp $	*/
 
 /*
  * Copyright (c) 2001 Theo de Raadt
@@ -292,6 +292,9 @@ bail:
 	case CIOCKEY:
 		error = cryptodev_key((struct crypt_kop *)data);
 		break;
+	case CIOCSYMFEAT:
+		error = crypto_getfeat((int *)data);
+		break;
 	default:
 		error = EINVAL;
 	}
diff --git a/sys/crypto/cryptodev.h b/sys/crypto/cryptodev.h
index 3e982c159b2..5d4088ad513 100644
--- a/sys/crypto/cryptodev.h
+++ b/sys/crypto/cryptodev.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: cryptodev.h,v 1.25 2002/04/23 19:13:04 deraadt Exp $	*/
+/*	$OpenBSD: cryptodev.h,v 1.26 2002/04/23 22:20:47 deraadt Exp $	*/
 
 /*
  * The author of this code is Angelos D. Keromytis (angelos@cis.upenn.edu)
@@ -302,6 +302,7 @@ int	crypto_invoke(struct cryptop *);
 int	crypto_kinvoke(struct cryptkop *);
 void	crypto_done(struct cryptop *);
 void	crypto_kdone(struct cryptkop *);
+int	crypto_getfeat(int *);
 
 void	cuio_copydata(struct uio *, int, int, caddr_t);
 void	cuio_copyback(struct uio *, int, int, caddr_t);
-- 
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