diff options
| author | Damien Miller <djm@cvs.openbsd.org> | 2021-08-29 23:53:11 +0000 |
|---|---|---|
| committer | Damien Miller <djm@cvs.openbsd.org> | 2021-08-29 23:53:11 +0000 |
| commit | 42a75000ce07163a21a3e5b706e3b8045543329c (patch) | |
| tree | 1e6726dae809a08e78d4ceb3207e82275a6613d5 | |
| parent | f7c02fcb2e27e5deac9b056562601ba4b5797d9a (diff) | |
After years of forewarning, disable the RSA/SHA-1 signature algorithm
by default. It is feasible to create colliding SHA1 hashes, so we
need to deprecate its use.
RSA/SHA-256/512 remains available and will be transparently selected
instead of RSA/SHA1 for most SSH servers released in the last five+
years. There is no need to regenerate RSA keys.
The use of RSA/SHA1 can be re-enabled by adding "ssh-rsa" to the
PubkeyAcceptedAlgorithms directives on the client and server.
ok dtucker deraadt
| -rw-r--r-- | usr.bin/ssh/myproposal.h | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/usr.bin/ssh/myproposal.h b/usr.bin/ssh/myproposal.h index f03b7dfd0df..6d79937b6fa 100644 --- a/usr.bin/ssh/myproposal.h +++ b/usr.bin/ssh/myproposal.h @@ -1,4 +1,4 @@ -/* $OpenBSD: myproposal.h,v 1.68 2020/10/03 04:15:06 djm Exp $ */ +/* $OpenBSD: myproposal.h,v 1.69 2021/08/29 23:53:10 djm Exp $ */ /* * Copyright (c) 2000 Markus Friedl. All rights reserved. @@ -46,7 +46,6 @@ "sk-ecdsa-sha2-nistp256-cert-v01@openssh.com," \ "rsa-sha2-512-cert-v01@openssh.com," \ "rsa-sha2-256-cert-v01@openssh.com," \ - "ssh-rsa-cert-v01@openssh.com," \ "ssh-ed25519," \ "ecdsa-sha2-nistp256," \ "ecdsa-sha2-nistp384," \ @@ -54,8 +53,7 @@ "sk-ssh-ed25519@openssh.com," \ "sk-ecdsa-sha2-nistp256@openssh.com," \ "rsa-sha2-512," \ - "rsa-sha2-256," \ - "ssh-rsa" + "rsa-sha2-256" #define KEX_SERVER_ENCRYPT \ "chacha20-poly1305@openssh.com," \ |