search for: ext_info_c

...entication. However the server side is different: int kex_send_newkeys(struct ssh *ssh) { ... debug("SSH2_MSG_NEWKEYS sent"); debug("expecting SSH2_MSG_NEWKEYS"); ssh_dispatch_set(ssh, SSH2_MSG_NEWKEYS, &kex_input_newkeys); if (ssh->kex->ext_info_c) if ((r = kex_send_ext_info(ssh)) != 0) return r; return 0; } There doesn't seem to have any logic in the client side that restricts sending ext-info-c in the list of kex algorithms after the first key exchange. However I couldn't find it in...

https://bugzilla.mindrot.org/show_bug.cgi?id=2929 Bug ID: 2929 Summary: OpenSSH server should not send the SSH_MSG_EXT_INFO message after rekeying Product: Portable OpenSSH Version: 7.7p1 Hardware: Other OS: Linux Status: NEW Severity: enhancement Priority: P5