upstream: add sshkey_parse_pubkey_from_private_fileblob_type()

Extracts a public key from the unencrypted envelope of a new-style
OpenSSH private key.

ok markus@

OpenBSD-Commit-ID: 44d7ab446e5e8c686aee96d5897b26b3939939aa

1 files changed, 3 insertions, 1 deletions

diff --git a/sshkey.h b/sshkey.h
index 71a3fddcb..9c1d4f637 100644
--- a/sshkey.h
+++ b/sshkey.h
@@ -1,4 +1,4 @@
-/* $OpenBSD: sshkey.h,v 1.44 2019/12/30 09:23:28 djm Exp $ */
+/* $OpenBSD: sshkey.h,v 1.45 2020/04/08 00:08:46 djm Exp $ */
 
 /*
  * Copyright (c) 2000, 2001 Markus Friedl.  All rights reserved.
@@ -259,6 +259,8 @@ int	sshkey_parse_private_fileblob(struct sshbuf *buffer,
     const char *passphrase, struct sshkey **keyp, char **commentp);
 int     sshkey_parse_private_fileblob_type(struct sshbuf *blob, int type,
     const char *passphrase, struct sshkey **keyp, char **commentp);
+int     sshkey_parse_pubkey_from_private_fileblob_type(struct sshbuf *blob,
+    int type, struct sshkey **pubkeyp);
 
 /* XXX should be internal, but used by ssh-keygen */
 int ssh_rsa_complete_crt_parameters(struct sshkey *, const BIGNUM *);