tree a07f980ded9f527664603d2911d464ebea28d9ff
parent 0da2a6a1bbc8e689a335bea68b5cc0e3e8728854
author Nicola Murino <nicola.murino@gmail.com> 1711192224 +0100
committer Roland Shoemaker <roland@golang.org> 1714743656 +0000

ssh: validate key type in SSH_MSG_USERAUTH_PK_OK response

According to RFC 4252 Section 7 the algorithm in SSH_MSG_USERAUTH_PK_OK
should match that of the request but some servers send the key type instead.
OpenSSH checks for the key type, so we do the same.

Fixes golang/go#66438
Fixes golang/go#64785
Fixes golang/go#56342
Fixes golang/go#54027

Change-Id: I2f733f0faece097e44ba7a97c868d30a53e21d79
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/573360
Auto-Submit: Nicola Murino <nicola.murino@gmail.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Run-TryBot: Nicola Murino <nicola.murino@gmail.com>
Reviewed-by: Roland Shoemaker <roland@golang.org>
Reviewed-by: Filippo Valsorda <filippo@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Joedian Reid <joedian@google.com>