diff options
| author | djm@openbsd.org <djm@openbsd.org> | 2019-05-20 00:20:35 +0000 |
|---|---|---|
| committer | Damien Miller <djm@mindrot.org> | 2019-05-20 10:21:58 +1000 |
| commit | 476e3551b2952ef73acc43d995e832539bf9bc4d (patch) | |
| tree | 326f23ca0f27d7fd4242ce88892d0af9a2da2c3c /ssh-keygen.1 | |
| parent | 606077ee1e77af5908431d003fb28461ef7be092 (diff) | |
upstream: When signing certificates with an RSA key, default to
using the rsa-sha2-512 signature algorithm. Certificates signed by RSA keys
will therefore be incompatible with OpenSSH < 7.2 unless the default is
overridden.
Document the ability of the ssh-keygen -t flag to override the
signature algorithm when signing certificates, and the new default.
ok deraadt@
OpenBSD-Commit-ID: 400c9c15013978204c2cb80f294b03ae4cfc8b95
Diffstat (limited to 'ssh-keygen.1')
| -rw-r--r-- | ssh-keygen.1 | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/ssh-keygen.1 b/ssh-keygen.1 index f2977424..673bf6e2 100644 --- a/ssh-keygen.1 +++ b/ssh-keygen.1 @@ -1,4 +1,4 @@ -.\" $OpenBSD: ssh-keygen.1,v 1.158 2019/04/19 05:47:44 dtucker Exp $ +.\" $OpenBSD: ssh-keygen.1,v 1.159 2019/05/20 00:20:35 djm Exp $ .\" .\" Author: Tatu Ylonen <ylo@cs.hut.fi> .\" Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland @@ -35,7 +35,7 @@ .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. .\" -.Dd $Mdocdate: April 19 2019 $ +.Dd $Mdocdate: May 20 2019 $ .Dt SSH-KEYGEN 1 .Os .Sh NAME @@ -577,6 +577,15 @@ The possible values are .Dq ed25519 , or .Dq rsa . +.Pp +This flag may also be used to specify the desired signature type when +signing certificates using a RSA CA key. +The available RSA signature variants are +.Dq ssh-rsa +(SHA1 signatures, not recommended), +.Dq rsa-sha2-256 +.Dq rsa-sha2-512 +(the default). .It Fl U When used in combination with .Fl s , |