===================================================================
RCS file: /cvsrepo/anoncvs/cvs/src/usr.bin/ssh/ssh-ecdsa.c,v
retrieving revision 1.20
retrieving revision 1.21
diff -u -r1.20 -r1.21
--- src/usr.bin/ssh/ssh-ecdsa.c	2022/10/28 00:39:29	1.20
+++ src/usr.bin/ssh/ssh-ecdsa.c	2022/10/28 00:41:17	1.21
@@ -1,4 +1,4 @@
-/* $OpenBSD: ssh-ecdsa.c,v 1.20 2022/10/28 00:39:29 djm Exp $ */
+/* $OpenBSD: ssh-ecdsa.c,v 1.21 2022/10/28 00:41:17 djm Exp $ */
 /*
  * Copyright (c) 2000 Markus Friedl.  All rights reserved.
  * Copyright (c) 2010 Damien Miller.  All rights reserved.
@@ -118,6 +118,18 @@
 	return 0;
 }
 
+static int
+ssh_ecdsa_copy_public(const struct sshkey *from, struct sshkey *to)
+{
+	to->ecdsa_nid = from->ecdsa_nid;
+	if ((to->ecdsa = EC_KEY_new_by_curve_name(from->ecdsa_nid)) == NULL)
+		return SSH_ERR_ALLOC_FAIL;
+	if (EC_KEY_set_public_key(to->ecdsa,
+	    EC_KEY_get0_public_key(from->ecdsa)) != 1)
+		return SSH_ERR_LIBCRYPTO_ERROR; /* caller will free k->ecdsa */
+	return 0;
+}
+
 /* ARGSUSED */
 int
 ssh_ecdsa_sign(const struct sshkey *key, u_char **sigp, size_t *lenp,
@@ -278,6 +290,7 @@
 	/* .equal = */		ssh_ecdsa_equal,
 	/* .ssh_serialize_public = */ ssh_ecdsa_serialize_public,
 	/* .generate = */	ssh_ecdsa_generate,
+	/* .copy_public = */	ssh_ecdsa_copy_public,
 };
 
 const struct sshkey_impl sshkey_ecdsa_nistp256_impl = {