Re: bin/53670: openssl/openssh compat broken

[Martin Husemann <martin%duskware.de@localhost>]

The following reply was made to PR bin/53670; it has been noted by GNATS.

From: Martin Husemann <martin%duskware.de@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: 
Subject: Re: bin/53670: openssl/openssh compat broken
Date: Mon, 15 Oct 2018 10:15:58 +0200

 No amount of configuration on the 7.2 host seemed to help, all attempts
 fail on the sparc64 side.
 
 What works:
 
  - ssh from a -current amd64 machine into the 7.2 evbarm machine
  - ssh from the -current sparc64 machine into a 8.0 amd64 machine
 
 What does not work:
 
  - ssh from the -current sparc64 machine into a -current amd64 machine
  - ssh from the -current sparc64 machine into the 7.2 evbarm machine
 
 
 Below is debug output from a working and a non-working connection.
 
 Martin
 
 
 Working against 8.0 amd64:
 
 OpenSSH_7.8 NetBSD_Secure_Shell-20180825, OpenSSL 1.1.1  11 Sep 2018
 debug1: Reading configuration data /etc/ssh/ssh_config
 debug2: resolving "emmas" port 22
 debug2: ssh_connect_direct
 debug1: Connecting to emmas [192.168.111.42] port 22.
 debug1: Connection established.
 debug1: identity file /home/martin/.ssh/id_rsa type 0
 debug1: identity file /home/martin/.ssh/id_rsa-cert type -1
 debug1: identity file /home/martin/.ssh/id_dsa type 1
 debug1: identity file /home/martin/.ssh/id_dsa-cert type -1
 debug1: identity file /home/martin/.ssh/id_ecdsa type -1
 debug1: identity file /home/martin/.ssh/id_ecdsa-cert type -1
 debug1: identity file /home/martin/.ssh/id_ed25519 type -1
 debug1: identity file /home/martin/.ssh/id_ed25519-cert type -1
 debug1: identity file /home/martin/.ssh/id_xmss type -1
 debug1: identity file /home/martin/.ssh/id_xmss-cert type -1
 debug1: Local version string SSH-2.0-OpenSSH_7.8 NetBSD_Secure_Shell-20180825
 debug1: Remote protocol version 2.0, remote software version OpenSSH_7.6 NetBSD_Secure_Shell-20171007
 debug1: match: OpenSSH_7.6 NetBSD_Secure_Shell-20171007 pat OpenSSH_7.0*,OpenSSH_7.1*,OpenSSH_7.2*,OpenSSH_7.3*,OpenSSH_7.4*,OpenSSH_7.5*,OpenSSH_7.6*,OpenSSH_7.7* compat 0x04000002
 debug1: Remote is NON-HPN aware
 debug2: fd 5 setting O_NONBLOCK
 debug1: Authenticating to emmas:22 as 'martin'
 debug3: hostkeys_foreach: reading file "/home/martin/.ssh/known_hosts"
 debug1: /home/martin/.ssh/known_hosts:10: parse error in hostkeys file
 debug3: hostkeys_foreach: reading file "/home/martin/.ssh/known_hosts2"
 debug3: record_hostkey: found key type RSA in file /home/martin/.ssh/known_hosts2:21
 debug3: record_hostkey: found key type DSA in file /home/martin/.ssh/known_hosts2:22
 debug3: load_hostkeys: loaded 2 keys from emmas
 debug3: hostkeys_foreach: reading file "/etc/ssh/ssh_known_hosts"
 debug3: order_hostkeyalgs: prefer hostkeyalgs: rsa-sha2-512-cert-v01%openssh.com@localhost,rsa-sha2-256-cert-v01%openssh.com@localhost,ssh-rsa-cert-v01%openssh.com@localhost,rsa-sha2-512,rsa-sha2-256,ssh-rsa
 debug3: send packet: type 20
 debug2: mac 0x0, -1 -1
 debug1: SSH2_MSG_KEXINIT sent
 debug3: receive packet: type 20
 debug1: SSH2_MSG_KEXINIT received
 debug2: local client KEXINIT proposal
 debug2: KEX algorithms: curve25519-sha256,curve25519-sha256%libssh.org@localhost,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group14-sha256,diffie-hellman-group14-sha1,ext-info-c
 debug2: host key algorithms: rsa-sha2-512-cert-v01%openssh.com@localhost,rsa-sha2-256-cert-v01%openssh.com@localhost,ssh-rsa-cert-v01%openssh.com@localhost,rsa-sha2-512,rsa-sha2-256,ssh-rsa,ecdsa-sha2-nistp256-cert-v01%openssh.com@localhost,ecdsa-sha2-nistp384-cert-v01%openssh.com@localhost,ecdsa-sha2-nistp521-cert-v01%openssh.com@localhost,ssh-ed25519-cert-v01%openssh.com@localhost,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed25519
 debug2: ciphers ctos: chacha20-poly1305%openssh.com@localhost,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm%openssh.com@localhost,aes256-gcm%openssh.com@localhost
 debug2: ciphers stoc: chacha20-poly1305%openssh.com@localhost,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm%openssh.com@localhost,aes256-gcm%openssh.com@localhost
 debug2: MACs ctos: umac-64-etm%openssh.com@localhost,umac-128-etm%openssh.com@localhost,hmac-sha2-256-etm%openssh.com@localhost,hmac-sha2-512-etm%openssh.com@localhost,hmac-sha1-etm%openssh.com@localhost,umac-64%openssh.com@localhost,umac-128%openssh.com@localhost,hmac-sha2-256,hmac-sha2-512,hmac-sha1
 debug2: MACs stoc: umac-64-etm%openssh.com@localhost,umac-128-etm%openssh.com@localhost,hmac-sha2-256-etm%openssh.com@localhost,hmac-sha2-512-etm%openssh.com@localhost,hmac-sha1-etm%openssh.com@localhost,umac-64%openssh.com@localhost,umac-128%openssh.com@localhost,hmac-sha2-256,hmac-sha2-512,hmac-sha1
 debug2: compression ctos: none,zlib%openssh.com@localhost,zlib
 debug2: compression stoc: none,zlib%openssh.com@localhost,zlib
 debug2: languages ctos: 
 debug2: languages stoc: 
 debug2: first_kex_follows 0 
 debug2: reserved 0 
 debug2: peer server KEXINIT proposal
 debug2: KEX algorithms: curve25519-sha256%libssh.org@localhost,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
 debug2: host key algorithms: ssh-rsa,rsa-sha2-512,rsa-sha2-256,ecdsa-sha2-nistp521,ssh-ed25519
 debug2: ciphers ctos: aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm%openssh.com@localhost,aes256-gcm%openssh.com@localhost,chacha20-poly1305%openssh.com@localhost,aes128-cbc
 debug2: ciphers stoc: aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm%openssh.com@localhost,aes256-gcm%openssh.com@localhost,chacha20-poly1305%openssh.com@localhost,aes128-cbc
 debug2: MACs ctos: umac-64-etm%openssh.com@localhost,umac-128-etm%openssh.com@localhost,hmac-sha2-256-etm%openssh.com@localhost,hmac-sha2-512-etm%openssh.com@localhost,hmac-sha1-etm%openssh.com@localhost,umac-64%openssh.com@localhost,umac-128%openssh.com@localhost,hmac-sha2-256,hmac-sha2-512,hmac-sha1
 debug2: MACs stoc: umac-64-etm%openssh.com@localhost,umac-128-etm%openssh.com@localhost,hmac-sha2-256-etm%openssh.com@localhost,hmac-sha2-512-etm%openssh.com@localhost,hmac-sha1-etm%openssh.com@localhost,umac-64%openssh.com@localhost,umac-128%openssh.com@localhost,hmac-sha2-256,hmac-sha2-512,hmac-sha1
 debug2: compression ctos: none,zlib%openssh.com@localhost
 debug2: compression stoc: none,zlib%openssh.com@localhost
 debug2: languages ctos: 
 debug2: languages stoc: 
 debug2: first_kex_follows 0 
 debug2: reserved 0 
 debug1: kex: algorithm: curve25519-sha256%libssh.org@localhost
 debug1: kex: host key algorithm: rsa-sha2-512
 debug1: REQUESTED ENC.NAME is 'chacha20-poly1305%openssh.com@localhost'
 debug1: kex: server->client cipher: chacha20-poly1305%openssh.com@localhost MAC: <implicit> compression: none
 debug1: REQUESTED ENC.NAME is 'chacha20-poly1305%openssh.com@localhost'
 debug1: kex: client->server cipher: chacha20-poly1305%openssh.com@localhost MAC: <implicit> compression: none
 debug3: send packet: type 30
 debug2: mac 0x0, -1 -1
 debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
 debug3: receive packet: type 31
 debug1: Server host key: ssh-rsa SHA256:CRTjxxHqPvvLWp7XhLQPS1A9R3NNUVIKmQUPrp874uw
 debug3: hostkeys_foreach: reading file "/home/martin/.ssh/known_hosts"
 debug1: /home/martin/.ssh/known_hosts:10: parse error in hostkeys file
 debug3: hostkeys_foreach: reading file "/home/martin/.ssh/known_hosts2"
 debug3: record_hostkey: found key type RSA in file /home/martin/.ssh/known_hosts2:21
 debug3: record_hostkey: found key type DSA in file /home/martin/.ssh/known_hosts2:22
 debug3: load_hostkeys: loaded 2 keys from emmas
 debug3: hostkeys_foreach: reading file "/etc/ssh/ssh_known_hosts"
 debug3: hostkeys_foreach: reading file "/home/martin/.ssh/known_hosts"
 debug3: hostkeys_foreach: reading file "/home/martin/.ssh/known_hosts2"
 debug3: record_hostkey: found key type RSA in file /home/martin/.ssh/known_hosts2:21
 debug3: record_hostkey: found key type DSA in file /home/martin/.ssh/known_hosts2:22
 debug3: load_hostkeys: loaded 2 keys from 192.168.111.42
 debug3: hostkeys_foreach: reading file "/etc/ssh/ssh_known_hosts"
 debug1: Host 'emmas' is known and matches the RSA host key.
 debug1: Found key in /home/martin/.ssh/known_hosts2:21
 debug3: send packet: type 21
 debug2: mac 0x0, -1 -1
 debug2: set_newkeys: mode 1
 debug1: rekey after 134217728 blocks
 debug1: SSH2_MSG_NEWKEYS sent
 debug1: expecting SSH2_MSG_NEWKEYS
 debug3: receive packet: type 21
 debug1: SSH2_MSG_NEWKEYS received
 debug2: set_newkeys: mode 0
 debug1: rekey after 134217728 blocks
 debug2: key: /home/martin/.ssh/id_rsa (0x42a5a0f0), agent
 debug1: Skipping ssh-dss key /home/martin/.ssh/id_dsa - not in PubkeyAcceptedKeyTypes
 debug2: key: /home/martin/.ssh/id_ecdsa (0x0)
 debug2: key: /home/martin/.ssh/id_ed25519 (0x0)
 debug2: key: /home/martin/.ssh/id_xmss (0x0)
 debug3: send packet: type 5
 debug2: mac 0x0, -1 -1
 debug3: receive packet: type 7
 debug1: SSH2_MSG_EXT_INFO received
 debug1: kex_input_ext_info: server-sig-algs=<ssh-ed25519,ssh-rsa,rsa-sha2-256,rsa-sha2-512,ssh-dss,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521>
 debug3: receive packet: type 6
 debug2: service_accept: ssh-userauth
 debug1: SSH2_MSG_SERVICE_ACCEPT received
 debug3: send packet: type 50
 debug2: mac 0x0, -1 -1
 debug3: receive packet: type 51
 debug1: Authentications that can continue: publickey
 debug3: start over, passed a different list publickey
 debug3: preferred kerberos-2%ssh.com@localhost,publickey,keyboard-interactive,password
 debug3: authmethod_lookup publickey
 debug3: remaining preferred: keyboard-interactive,password
 debug3: authmethod_is_enabled publickey
 debug1: Next authentication method: publickey
 debug1: Offering public key: RSA SHA256:i33ywlz7LShDizeDeBbkNWIkxvkalMe5lY2k7aDXQ9M /home/martin/.ssh/id_rsa
 debug3: send packet: type 50
 debug2: mac 0x0, -1 -1
 debug2: we sent a publickey packet, wait for reply
 debug3: receive packet: type 60
 debug1: Server accepts key: pkalg rsa-sha2-512 blen 535
 debug2: input_userauth_pk_ok: fp SHA256:i33ywlz7LShDizeDeBbkNWIkxvkalMe5lY2k7aDXQ9M
 debug3: sign_and_send_pubkey: RSA SHA256:i33ywlz7LShDizeDeBbkNWIkxvkalMe5lY2k7aDXQ9M
 debug3: sign_and_send_pubkey: signing using rsa-sha2-512
 debug3: send packet: type 50
 debug2: mac 0x0, -1 -1
 debug3: receive packet: type 52
 debug1: Authentication succeeded (publickey).
 Authenticated to emmas ([192.168.111.42]:22).
 debug1: HPN to Non-HPN Connection
 [..]
 
 
 Non working against a -current amd64:
 
 [/tmp] martin@whoever-brings-the-night > ssh -vvv seven
 OpenSSH_7.8 NetBSD_Secure_Shell-20180825, OpenSSL 1.1.1  11 Sep 2018
 debug1: Reading configuration data /etc/ssh/ssh_config
 debug2: resolving "seven" port 22
 debug2: ssh_connect_direct
 debug1: Connecting to seven [192.168.111.201] port 22.
 debug1: Connection established.
 debug1: identity file /home/martin/.ssh/id_rsa type 0
 debug1: identity file /home/martin/.ssh/id_rsa-cert type -1
 debug1: identity file /home/martin/.ssh/id_dsa type 1
 debug1: identity file /home/martin/.ssh/id_dsa-cert type -1
 debug1: identity file /home/martin/.ssh/id_ecdsa type -1
 debug1: identity file /home/martin/.ssh/id_ecdsa-cert type -1
 debug1: identity file /home/martin/.ssh/id_ed25519 type -1
 debug1: identity file /home/martin/.ssh/id_ed25519-cert type -1
 debug1: identity file /home/martin/.ssh/id_xmss type -1
 debug1: identity file /home/martin/.ssh/id_xmss-cert type -1
 debug1: Local version string SSH-2.0-OpenSSH_7.8 NetBSD_Secure_Shell-20180825
 debug1: Remote protocol version 2.0, remote software version OpenSSH_7.8 NetBSD_Secure_Shell-20180825
 debug1: match: OpenSSH_7.8 NetBSD_Secure_Shell-20180825 pat OpenSSH* compat 0x04000000
 debug1: Remote is NON-HPN aware
 debug2: fd 5 setting O_NONBLOCK
 debug1: Authenticating to seven:22 as 'martin'
 debug3: hostkeys_foreach: reading file "/home/martin/.ssh/known_hosts"
 debug1: /home/martin/.ssh/known_hosts:192: parse error in hostkeys file
 debug3: hostkeys_foreach: reading file "/home/martin/.ssh/known_hosts2"
 debug3: hostkeys_foreach: reading file "/etc/ssh/ssh_known_hosts"
 debug3: send packet: type 20
 debug2: mac 0x0, -1 -1
 debug1: SSH2_MSG_KEXINIT sent
 debug3: receive packet: type 20
 debug1: SSH2_MSG_KEXINIT received
 debug2: local client KEXINIT proposal
 debug2: KEX algorithms: curve25519-sha256,curve25519-sha256%libssh.org@localhost,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group14-sha256,diffie-hellman-group14-sha1,ext-info-c
 debug2: host key algorithms: ecdsa-sha2-nistp256-cert-v01%openssh.com@localhost,ecdsa-sha2-nistp384-cert-v01%openssh.com@localhost,ecdsa-sha2-nistp521-cert-v01%openssh.com@localhost,ssh-ed25519-cert-v01%openssh.com@localhost,rsa-sha2-512-cert-v01%openssh.com@localhost,rsa-sha2-256-cert-v01%openssh.com@localhost,ssh-rsa-cert-v01%openssh.com@localhost,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed25519,rsa-sha2-512,rsa-sha2-256,ssh-rsa
 debug2: ciphers ctos: chacha20-poly1305%openssh.com@localhost,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm%openssh.com@localhost,aes256-gcm%openssh.com@localhost
 debug2: ciphers stoc: chacha20-poly1305%openssh.com@localhost,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm%openssh.com@localhost,aes256-gcm%openssh.com@localhost
 debug2: MACs ctos: umac-64-etm%openssh.com@localhost,umac-128-etm%openssh.com@localhost,hmac-sha2-256-etm%openssh.com@localhost,hmac-sha2-512-etm%openssh.com@localhost,hmac-sha1-etm%openssh.com@localhost,umac-64%openssh.com@localhost,umac-128%openssh.com@localhost,hmac-sha2-256,hmac-sha2-512,hmac-sha1
 debug2: MACs stoc: umac-64-etm%openssh.com@localhost,umac-128-etm%openssh.com@localhost,hmac-sha2-256-etm%openssh.com@localhost,hmac-sha2-512-etm%openssh.com@localhost,hmac-sha1-etm%openssh.com@localhost,umac-64%openssh.com@localhost,umac-128%openssh.com@localhost,hmac-sha2-256,hmac-sha2-512,hmac-sha1
 debug2: compression ctos: none,zlib%openssh.com@localhost,zlib
 debug2: compression stoc: none,zlib%openssh.com@localhost,zlib
 debug2: languages ctos: 
 debug2: languages stoc: 
 debug2: first_kex_follows 0 
 debug2: reserved 0 
 debug2: peer server KEXINIT proposal
 debug2: KEX algorithms: curve25519-sha256%libssh.org@localhost,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
 debug2: host key algorithms: rsa-sha2-512,rsa-sha2-256,ssh-rsa,ecdsa-sha2-nistp521,ssh-ed25519
 debug2: ciphers ctos: aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm%openssh.com@localhost,aes256-gcm%openssh.com@localhost,chacha20-poly1305%openssh.com@localhost,aes128-cbc
 debug2: ciphers stoc: aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm%openssh.com@localhost,aes256-gcm%openssh.com@localhost,chacha20-poly1305%openssh.com@localhost,aes128-cbc
 debug2: MACs ctos: umac-64-etm%openssh.com@localhost,umac-128-etm%openssh.com@localhost,hmac-sha2-256-etm%openssh.com@localhost,hmac-sha2-512-etm%openssh.com@localhost,hmac-sha1-etm%openssh.com@localhost,umac-64%openssh.com@localhost,umac-128%openssh.com@localhost,hmac-sha2-256,hmac-sha2-512,hmac-sha1
 debug2: MACs stoc: umac-64-etm%openssh.com@localhost,umac-128-etm%openssh.com@localhost,hmac-sha2-256-etm%openssh.com@localhost,hmac-sha2-512-etm%openssh.com@localhost,hmac-sha1-etm%openssh.com@localhost,umac-64%openssh.com@localhost,umac-128%openssh.com@localhost,hmac-sha2-256,hmac-sha2-512,hmac-sha1
 debug2: compression ctos: none,zlib%openssh.com@localhost
 debug2: compression stoc: none,zlib%openssh.com@localhost
 debug2: languages ctos: 
 debug2: languages stoc: 
 debug2: first_kex_follows 0 
 debug2: reserved 0 
 debug1: kex: algorithm: curve25519-sha256%libssh.org@localhost
 debug1: kex: host key algorithm: ecdsa-sha2-nistp521
 debug1: REQUESTED ENC.NAME is 'chacha20-poly1305%openssh.com@localhost'
 debug1: kex: server->client cipher: chacha20-poly1305%openssh.com@localhost MAC: <implicit> compression: none
 debug1: REQUESTED ENC.NAME is 'chacha20-poly1305%openssh.com@localhost'
 debug1: kex: client->server cipher: chacha20-poly1305%openssh.com@localhost MAC: <implicit> compression: none
 debug3: send packet: type 30
 debug2: mac 0x0, -1 -1
 debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
 debug3: receive packet: type 31
 ssh_dispatch_run_fatal: Connection to 192.168.111.201 port 22: invalid elliptic curve value