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MaxRaab
February 15, 2022
Question

SSH Key Certificates

  • February 15, 2022
  • 18 replies
  • 1152 views

Hello,

I'm using SSH keys in combination with certificates. The certificates are the result of a signing process by a ca certificate.
Normally the ssh-agent adds them automatically if they are named correctly.

An example:

key
key.pub
key-cert.pub`

$ ssh-add key

Enter passphrase for /home/max/.ssh/key:
Identity added: /home/max/.ssh/key (Server access)
Certificate added: /home/max/.ssh/key-cert.pub (certificate_max)

How do I add my certificates to 1Password? (One can have more than one certificate per key)

Kind regards,
Max

1Password Version: Not Provided
Extension Version: Not Provided
OS Version: Not Provided

18 replies

Show previous replies
floris_1P
floris_1P
1Password Employee
March 16, 2022

Could you also share your (client-side) ssh -v output?

K_J__1P
K_J__1P
1Password Employee
March 16, 2022

@nielsk Thanks. I looked into this further and it's a different signing algorithm. E.g., ssh-rsa-cert-v01@openssh.com. This is something we would need to add support for.

We have noted your request in our internal tracker. Thanks for the feedback!

A
Anonymous
March 16, 2022

ok -- I get it suddenly working. With FreeBSD 13-systems it works; with older FreeBSD-versions it does not work and it also does not work with CentOS7-systems, but Debian 11 works.

My output from ssh -v:
❯ ssh -v desthost
OpenSSH_8.6p1, LibreSSL 3.3.5
debug1: Reading configuration data /Users/nik/.ssh/config
debug1: /Users/nik/.ssh/config line 204: Applying options for desthost
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 21: include /etc/ssh/ssh_config.d/* matched no files
debug1: /etc/ssh/ssh_config line 54: Applying options for *
debug1: Authenticator provider $SSH_SK_PROVIDER did not resolve; disabling
debug1: auto-mux: Trying existing master
debug1: Control socket "/Users/nik/.ssh/connections/mux_00e2d55221ac236fbe3807269258a4722b2647a7" does not exist
debug1: Connecting to my.destination.com port 22.
debug1: Connection established.
debug1: identity file /Users/nik/.ssh/id_rsa type -1
debug1: identity file /Users/nik/.ssh/id_dsa type -1
debug1: identity file /Users/nik/.ssh/id_ecdsa type -1
debug1: identity file /Users/nik/.ssh/id_ecdsa_sk type -1
debug1: identity file /Users/nik/.ssh/id_ed25519 type -1
debug1: identity file /Users/nik/.ssh/id_ed25519_sk type -1
debug1: identity file /Users/nik/.ssh/id_xmss type -1
debug1: certificate file /Users/nik/.ssh/id_rsa_sam-cert.pub type 4
debug1: Local version string SSH-2.0-OpenSSH_8.6
debug1: Remote protocol version 2.0, remote software version OpenSSH_7.5 FreeBSD-20170903
debug1: compat_banner: match: OpenSSH_7.5 FreeBSD-20170903 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: Authenticating to my.destination.com:22 as 'user'
debug1: load_hostkeys: fopen /Users/nik/.ssh/known_hosts2: No such file or directory
debug1: load_hostkeys: fopen /etc/ssh/ssh_known_hosts: No such file or directory
debug1: load_hostkeys: fopen /etc/ssh/ssh_known_hosts2: No such file or directory
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: algorithm: curve25519-sha256
debug1: kex: host key algorithm: ecdsa-sha2-nistp256
debug1: kex: server->client cipher: mailto:chacha20-poly1305@openssh.com MAC: compression: none
debug1: kex: client->server cipher: mailto:chacha20-poly1305@openssh.com MAC: compression: none
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: SSH2_MSG_KEX_ECDH_REPLY received
debug1: Server host key: ecdsa-sha2-nistp256 SHA256:OHY8LPz3qv2cSwyMVIp/J32p38pin0cEbiMtAZXexhk
debug1: load_hostkeys: fopen /Users/nik/.ssh/known_hosts2: No such file or directory
debug1: load_hostkeys: fopen /etc/ssh/ssh_known_hosts: No such file or directory
debug1: load_hostkeys: fopen /etc/ssh/ssh_known_hosts2: No such file or directory
debug1: Host 'my.destination.com' is known and matches the ECDSA host key.
debug1: Found key in /Users/nik/.ssh/known_hosts:18
debug1: rekey out after 134217728 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: rekey in after 134217728 blocks
debug1: Will attempt key: /Users/nik/.ssh/id_rsa_sam-cert.pub RSA-CERT SHA256:jzuBd+ulgpxou9emJu1RRvIn9bf6plMl0E4mhQLHZvU explicit
debug1: Will attempt key: id_rsa_sam RSA SHA256:jzuBd+ulgpxou9emJu1RRvIn9bf6plMl0E4mhQLHZvU agent
debug1: Will attempt key: /Users/nik/.ssh/id_rsa
debug1: Will attempt key: /Users/nik/.ssh/id_dsa
debug1: Will attempt key: /Users/nik/.ssh/id_ecdsa
debug1: Will attempt key: /Users/nik/.ssh/id_ecdsa_sk
debug1: Will attempt key: /Users/nik/.ssh/id_ed25519
debug1: Will attempt key: /Users/nik/.ssh/id_ed25519_sk
debug1: Will attempt key: /Users/nik/.ssh/id_xmss
debug1: SSH2_MSG_EXT_INFO received
debug1: kex_input_ext_info: server-sig-algs=
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey,keyboard-interactive
debug1: Next authentication method: publickey
debug1: Offering public key: /Users/nik/.ssh/id_rsa_sam-cert.pub RSA-CERT SHA256:jzuBd+ulgpxou9emJu1RRvIn9bf6plMl0E4mhQLHZvU explicit
debug1: Server accepts key: /Users/nik/.ssh/id_rsa_sam-cert.pub RSA-CERT SHA256:jzuBd+ulgpxou9emJu1RRvIn9bf6plMl0E4mhQLHZvU explicit
sign_and_send_pubkey: signing failed for RSA "id_rsa_sam": agent refused operation
debug1: Offering public key: id_rsa_sam RSA SHA256:jzuBd+ulgpxou9emJu1RRvIn9bf6plMl0E4mhQLHZvU agent
debug1: Authentications that can continue: publickey,keyboard-interactive
debug1: Trying private key: /Users/nik/.ssh/id_rsa
debug1: Trying private key: /Users/nik/.ssh/id_dsa
debug1: Trying private key: /Users/nik/.ssh/id_ecdsa
debug1: Trying private key: /Users/nik/.ssh/id_ecdsa_sk
debug1: Trying private key: /Users/nik/.ssh/id_ed25519
debug1: Trying private key: /Users/nik/.ssh/id_ed25519_sk
debug1: Trying private key: /Users/nik/.ssh/id_xmss
debug1: Next authentication method: keyboard-interactive

A
Anonymous
March 16, 2022

ssh -d from a CentOS7-system:
debug1: sshd version OpenSSH_7.4, OpenSSL 1.0.2k-fips 26 Jan 2017
debug1: private host key #0: ssh-rsa SHA256:E2Z+0Q54ppdUjWDbepZ7BoHDdoyZ2jt1JVWXlGSXE4o
debug1: private host key #1: ecdsa-sha2-nistp256 SHA256:f1EeoqcSK2I55McM/nHddnSnkYzJjMwZ29mEsoxflb8
debug1: private host key #2: ssh-ed25519 SHA256:aeiz4bhAS1fsewpgQ5rdgIvHa7Hs8vW/CiUU+unbKWM
debug1: rexec_argv[0]='/usr/sbin/sshd'
debug1: rexec_argv[1]='-p'
debug1: rexec_argv[2]='2222'
debug1: rexec_argv[3]='-d'
debug1: Set /proc/self/oom_score_adj from 0 to -1000
debug1: Bind to port 2222 on 0.0.0.0.
Server listening on 0.0.0.0 port 2222.
debug1: Bind to port 2222 on ::.
Server listening on :: port 2222.
debug1: Server will not fork when running in debugging mode.
debug1: rexec start in 5 out 5 newsock 5 pipe -1 sock 8
debug1: inetd sockets after dupping: 3, 3
Connection from xxx.xxx.xxx.xxx port 9131 on 84.23.253.134 port 2222
debug1: Client protocol version 2.0; client software version OpenSSH_8.6
debug1: match: OpenSSH_8.6 pat OpenSSH* compat 0x04000000
debug1: Local version string SSH-2.0-OpenSSH_7.4
debug1: Enabling compatibility mode for protocol 2.0
debug1: SELinux support disabled [preauth]
debug1: permanently_set_uid: 74/74 [preauth]
debug1: list_hostkey_types: ssh-rsa,rsa-sha2-512,rsa-sha2-256,ecdsa-sha2-nistp256,ssh-ed25519 [preauth]
debug1: SSH2_MSG_KEXINIT sent [preauth]
debug1: SSH2_MSG_KEXINIT received [preauth]
debug1: kex: algorithm: curve25519-sha256 [preauth]
debug1: kex: host key algorithm: ssh-ed25519 [preauth]
debug1: kex: client->server cipher: mailto:chacha20-poly1305@openssh.com MAC: compression: none [preauth]
debug1: kex: server->client cipher: mailto:chacha20-poly1305@openssh.com MAC: compression: none [preauth]
debug1: kex: curve25519-sha256 need=64 dh_need=64 [preauth]
debug1: kex: curve25519-sha256 need=64 dh_need=64 [preauth]
debug1: expecting SSH2_MSG_KEX_ECDH_INIT [preauth]
debug1: rekey after 134217728 blocks [preauth]
debug1: SSH2_MSG_NEWKEYS sent [preauth]
debug1: expecting SSH2_MSG_NEWKEYS [preauth]
debug1: SSH2_MSG_NEWKEYS received [preauth]
debug1: rekey after 134217728 blocks [preauth]
debug1: KEX done [preauth]
debug1: userauth-request for user snafu service ssh-connection method none [preauth]
debug1: attempt 0 failures 0 [preauth]
debug1: user snafu matched 'User snafu' at line 27
debug1: PAM: initializing for "snafu"
debug1: PAM: setting PAM_RHOST to "access.snafu.de"
debug1: PAM: setting PAM_TTY to "ssh"
debug1: userauth-request for user snafu service ssh-connection method publickey [preauth]
debug1: attempt 1 failures 0 [preauth]
debug1: userauth_pubkey: test whether pkalg/pkblob are acceptable for RSA-CERT SHA256:jzuBd+ulgpxou9emJu1RRvIn9bf6plMl0E4mhQLHZvU [preauth]
debug1: temporarily_use_uid: 1006/1006 (e=0/0)
debug1: trying authorized principals file /etc/ssh/principals/snafu
debug1: fd 4 clearing O_NONBLOCK
debug1: restore_uid: 0/0
Accepted certificate ID "user_First_Last" (serial 0) signed by RSA CA SHA256:dbPkt/BpG+pUiXeMeO387oREZt1WLHrOePiArCNautE via /etc/ssh/user-ca-keys.pub
Postponed publickey for snafu from xxx.xxx.xxx.xxx port 9131 ssh2 [preauth]
debug1: userauth-request for user snafu service ssh-connection method publickey [preauth]
debug1: attempt 2 failures 0 [preauth]
debug1: userauth_pubkey: test whether pkalg/pkblob are acceptable for RSA SHA256:jzuBd+ulgpxou9emJu1RRvIn9bf6plMl0E4mhQLHZvU [preauth]
Failed publickey for snafu from xxx.xxx.xxx.xxx port 9131 ssh2: RSA SHA256:jzuBd+ulgpxou9emJu1RRvIn9bf6plMl0E4mhQLHZvU
Connection closed by xxx.xxx.xxx.xxx port 9131 [preauth]
debug1: do_cleanup [preauth]
debug1: monitor_read_log: child log fd closed
debug1: do_cleanup
debug1: PAM: cleanup
debug1: Killing privsep child 11978

A
Anonymous
March 16, 2022

ssh -d from a CentOS7-system:
debug1: sshd version OpenSSH_7.4, OpenSSL 1.0.2k-fips 26 Jan 2017
debug1: private host key #0: ssh-rsa SHA256:E2Z+0Q54ppdUjWDbepZ7BoHDdoyZ2jt1JVWXlGSXE4o
debug1: private host key #1: ecdsa-sha2-nistp256 SHA256:f1EeoqcSK2I55McM/nHddnSnkYzJjMwZ29mEsoxflb8
debug1: private host key #2: ssh-ed25519 SHA256:aeiz4bhAS1fsewpgQ5rdgIvHa7Hs8vW/CiUU+unbKWM
debug1: rexec_argv[0]='/usr/sbin/sshd'
debug1: rexec_argv[1]='-p'
debug1: rexec_argv[2]='2222'
debug1: rexec_argv[3]='-d'
debug1: Set /proc/self/oom_score_adj from 0 to -1000
debug1: Bind to port 2222 on 0.0.0.0.
Server listening on 0.0.0.0 port 2222.
debug1: Bind to port 2222 on ::.
Server listening on :: port 2222.
debug1: Server will not fork when running in debugging mode.
debug1: rexec start in 5 out 5 newsock 5 pipe -1 sock 8
debug1: inetd sockets after dupping: 3, 3
Connection from xxx.xxx.xxx.xxx port 9131 on 84.23.253.134 port 2222
debug1: Client protocol version 2.0; client software version OpenSSH_8.6
debug1: match: OpenSSH_8.6 pat OpenSSH* compat 0x04000000
debug1: Local version string SSH-2.0-OpenSSH_7.4
debug1: Enabling compatibility mode for protocol 2.0
debug1: SELinux support disabled [preauth]
debug1: permanently_set_uid: 74/74 [preauth]
debug1: list_hostkey_types: ssh-rsa,rsa-sha2-512,rsa-sha2-256,ecdsa-sha2-nistp256,ssh-ed25519 [preauth]
debug1: SSH2_MSG_KEXINIT sent [preauth]
debug1: SSH2_MSG_KEXINIT received [preauth]
debug1: kex: algorithm: curve25519-sha256 [preauth]
debug1: kex: host key algorithm: ssh-ed25519 [preauth]
debug1: kex: client->server cipher: mailto:chacha20-poly1305@openssh.com MAC: compression: none [preauth]
debug1: kex: server->client cipher: mailto:chacha20-poly1305@openssh.com MAC: compression: none [preauth]
debug1: kex: curve25519-sha256 need=64 dh_need=64 [preauth]
debug1: kex: curve25519-sha256 need=64 dh_need=64 [preauth]
debug1: expecting SSH2_MSG_KEX_ECDH_INIT [preauth]
debug1: rekey after 134217728 blocks [preauth]
debug1: SSH2_MSG_NEWKEYS sent [preauth]
debug1: expecting SSH2_MSG_NEWKEYS [preauth]
debug1: SSH2_MSG_NEWKEYS received [preauth]
debug1: rekey after 134217728 blocks [preauth]
debug1: KEX done [preauth]
debug1: userauth-request for user snafu service ssh-connection method none [preauth]
debug1: attempt 0 failures 0 [preauth]
debug1: user snafu matched 'User snafu' at line 27
debug1: PAM: initializing for "snafu"
debug1: PAM: setting PAM_RHOST to "access.snafu.de"
debug1: PAM: setting PAM_TTY to "ssh"
debug1: userauth-request for user snafu service ssh-connection method publickey [preauth]
debug1: attempt 1 failures 0 [preauth]
debug1: userauth_pubkey: test whether pkalg/pkblob are acceptable for RSA-CERT SHA256:jzuBd+ulgpxou9emJu1RRvIn9bf6plMl0E4mhQLHZvU [preauth]
debug1: temporarily_use_uid: 1006/1006 (e=0/0)
debug1: trying authorized principals file /etc/ssh/principals/snafu
debug1: fd 4 clearing O_NONBLOCK
debug1: restore_uid: 0/0
Accepted certificate ID "user_First_Last" (serial 0) signed by RSA CA SHA256:dbPkt/BpG+pUiXeMeO387oREZt1WLHrOePiArCNautE via /etc/ssh/user-ca-keys.pub
Postponed publickey for snafu from xxx.xxx.xxx.xxx port 9131 ssh2 [preauth]
debug1: userauth-request for user snafu service ssh-connection method publickey [preauth]
debug1: attempt 2 failures 0 [preauth]
debug1: userauth_pubkey: test whether pkalg/pkblob are acceptable for RSA SHA256:jzuBd+ulgpxou9emJu1RRvIn9bf6plMl0E4mhQLHZvU [preauth]
Failed publickey for snafu from xxx.xxx.xxx.xxx port 9131 ssh2: RSA SHA256:jzuBd+ulgpxou9emJu1RRvIn9bf6plMl0E4mhQLHZvU
Connection closed by xxx.xxx.xxx.xxx port 9131 [preauth]
debug1: do_cleanup [preauth]
debug1: monitor_read_log: child log fd closed
debug1: do_cleanup
debug1: PAM: cleanup
debug1: Killing privsep child 11978

A
Anonymous
March 16, 2022

and the ssh -v:
OpenSSH_8.6p1, LibreSSL 3.3.5
debug1: Reading configuration data /Users/nik/.ssh/config
debug1: /Users/nik/.ssh/config line 666: Applying options for lbp-beta
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 21: include /etc/ssh/ssh_config.d/* matched no files
debug1: /etc/ssh/ssh_config line 54: Applying options for *
debug1: Authenticator provider $SSH_SK_PROVIDER did not resolve; disabling
debug1: auto-mux: Trying existing master
debug1: Control socket "/Users/nik/.ssh/connections/mux_f13923b06c905842fb0135c98f243b441ae95199" does not exist
debug1: Connecting to lbp-beta.snafu.de port 2222.
debug1: Connection established.
debug1: identity file /Users/nik/.ssh/id_rsa type -1
debug1: identity file /Users/nik/.ssh/id_dsa type -1
debug1: identity file /Users/nik/.ssh/id_ecdsa type -1
debug1: identity file /Users/nik/.ssh/id_ecdsa_sk type -1
debug1: identity file /Users/nik/.ssh/id_ed25519 type -1
debug1: identity file /Users/nik/.ssh/id_ed25519_sk type -1
debug1: identity file /Users/nik/.ssh/id_xmss type -1
debug1: certificate file /Users/nik/.ssh/id_rsa_sam-cert.pub type 4
debug1: Local version string SSH-2.0-OpenSSH_8.6
debug1: Remote protocol version 2.0, remote software version OpenSSH_7.4
debug1: compat_banner: match: OpenSSH_7.4 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: Authenticating to lbp-beta.snafu.de:2222 as 'snafu'
debug1: load_hostkeys: fopen /Users/nik/.ssh/known_hosts2: No such file or directory
debug1: load_hostkeys: fopen /etc/ssh/ssh_known_hosts: No such file or directory
debug1: load_hostkeys: fopen /etc/ssh/ssh_known_hosts2: No such file or directory
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: algorithm: curve25519-sha256
debug1: kex: host key algorithm: ssh-ed25519
debug1: kex: server->client cipher: mailto:chacha20-poly1305@openssh.com MAC: compression: none
debug1: kex: client->server cipher: mailto:chacha20-poly1305@openssh.com MAC: compression: none
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: SSH2_MSG_KEX_ECDH_REPLY received
debug1: Server host key: ssh-ed25519 SHA256:aeiz4bhAS1fsewpgQ5rdgIvHa7Hs8vW/CiUU+unbKWM
debug1: load_hostkeys: fopen /Users/nik/.ssh/known_hosts2: No such file or directory
debug1: load_hostkeys: fopen /etc/ssh/ssh_known_hosts: No such file or directory
debug1: load_hostkeys: fopen /etc/ssh/ssh_known_hosts2: No such file or directory
debug1: Host '[lbp-beta.snafu.de]:2222' is known and matches the ED25519 host key.
debug1: Found key in /Users/nik/.ssh/known_hosts:1752
debug1: rekey out after 134217728 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: rekey in after 134217728 blocks
debug1: Will attempt key: /Users/nik/.ssh/id_rsa_sam-cert.pub RSA-CERT SHA256:jzuBd+ulgpxou9emJu1RRvIn9bf6plMl0E4mhQLHZvU explicit
debug1: Will attempt key: id_rsa_sam RSA SHA256:jzuBd+ulgpxou9emJu1RRvIn9bf6plMl0E4mhQLHZvU agent
debug1: Will attempt key: /Users/nik/.ssh/id_rsa
debug1: Will attempt key: /Users/nik/.ssh/id_dsa
debug1: Will attempt key: /Users/nik/.ssh/id_ecdsa
debug1: Will attempt key: /Users/nik/.ssh/id_ecdsa_sk
debug1: Will attempt key: /Users/nik/.ssh/id_ed25519
debug1: Will attempt key: /Users/nik/.ssh/id_ed25519_sk
debug1: Will attempt key: /Users/nik/.ssh/id_xmss
debug1: SSH2_MSG_EXT_INFO received
debug1: kex_input_ext_info: server-sig-algs=
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey,gssapi-keyex,gssapi-with-mic
debug1: Next authentication method: publickey
debug1: Offering public key: /Users/nik/.ssh/id_rsa_sam-cert.pub RSA-CERT SHA256:jzuBd+ulgpxou9emJu1RRvIn9bf6plMl0E4mhQLHZvU explicit
debug1: Server accepts key: /Users/nik/.ssh/id_rsa_sam-cert.pub RSA-CERT SHA256:jzuBd+ulgpxou9emJu1RRvIn9bf6plMl0E4mhQLHZvU explicit
sign_and_send_pubkey: signing failed for RSA "id_rsa_sam": agent refused operation
debug1: Offering public key: id_rsa_sam RSA SHA256:jzuBd+ulgpxou9emJu1RRvIn9bf6plMl0E4mhQLHZvU agent
debug1: Authentications that can continue: publickey,gssapi-keyex,gssapi-with-mic
debug1: Trying private key: /Users/nik/.ssh/id_rsa
debug1: Trying private key: /Users/nik/.ssh/id_dsa
debug1: Trying private key: /Users/nik/.ssh/id_ecdsa
debug1: Trying private key: /Users/nik/.ssh/id_ecdsa_sk
debug1: Trying private key: /Users/nik/.ssh/id_ed25519
debug1: Trying private key: /Users/nik/.ssh/id_ed25519_sk
debug1: Trying private key: /Users/nik/.ssh/id_xmss
debug1: No more authentication methods to try.
mailto:snafu@lbp-beta.snafu.de: Permission denied (publickey,gssapi-keyex,gssapi-with-mic).

A
Anonymous
March 16, 2022

Now a CentOS7-system: sshd -d
debug1: sshd version OpenSSH_7.4, OpenSSL 1.0.2k-fips 26 Jan 2017
debug1: private host key #0: ssh-rsa SHA256:E2Z+0Q54ppdUjWDbepZ7BoHDdoyZ2jt1JVWXlGSXE4o
debug1: private host key #1: ecdsa-sha2-nistp256 SHA256:f1EeoqcSK2I55McM/nHddnSnkYzJjMwZ29mEsoxflb8
debug1: private host key #2: ssh-ed25519 SHA256:aeiz4bhAS1fsewpgQ5rdgIvHa7Hs8vW/CiUU+unbKWM
debug1: rexec_argv[0]='/usr/sbin/sshd'
debug1: rexec_argv[1]='-p'
debug1: rexec_argv[2]='2222'
debug1: rexec_argv[3]='-d'
debug1: Set /proc/self/oom_score_adj from 0 to -1000
debug1: Bind to port 2222 on 0.0.0.0.
Server listening on 0.0.0.0 port 2222.
debug1: Bind to port 2222 on ::.
Server listening on :: port 2222.
debug1: Server will not fork when running in debugging mode.
debug1: rexec start in 5 out 5 newsock 5 pipe -1 sock 8
debug1: inetd sockets after dupping: 3, 3
Connection from xxx.xxx.xxx.xxx port 9131 on 84.23.253.134 port 2222
debug1: Client protocol version 2.0; client software version OpenSSH_8.6
debug1: match: OpenSSH_8.6 pat OpenSSH* compat 0x04000000
debug1: Local version string SSH-2.0-OpenSSH_7.4
debug1: Enabling compatibility mode for protocol 2.0
debug1: SELinux support disabled [preauth]
debug1: permanently_set_uid: 74/74 [preauth]
debug1: list_hostkey_types: ssh-rsa,rsa-sha2-512,rsa-sha2-256,ecdsa-sha2-nistp256,ssh-ed25519 [preauth]
debug1: SSH2_MSG_KEXINIT sent [preauth]
debug1: SSH2_MSG_KEXINIT received [preauth]
debug1: kex: algorithm: curve25519-sha256 [preauth]
debug1: kex: host key algorithm: ssh-ed25519 [preauth]
debug1: kex: client->server cipher: mailto:chacha20-poly1305@openssh.com MAC: compression: none [preauth]
debug1: kex: server->client cipher: mailto:chacha20-poly1305@openssh.com MAC: compression: none [preauth]
debug1: kex: curve25519-sha256 need=64 dh_need=64 [preauth]
debug1: kex: curve25519-sha256 need=64 dh_need=64 [preauth]
debug1: expecting SSH2_MSG_KEX_ECDH_INIT [preauth]
debug1: rekey after 134217728 blocks [preauth]
debug1: SSH2_MSG_NEWKEYS sent [preauth]
debug1: expecting SSH2_MSG_NEWKEYS [preauth]
debug1: SSH2_MSG_NEWKEYS received [preauth]
debug1: rekey after 134217728 blocks [preauth]
debug1: KEX done [preauth]
debug1: userauth-request for user myuser service ssh-connection method none [preauth]
debug1: attempt 0 failures 0 [preauth]
debug1: user myuser matched 'User myuser' at line 27
debug1: PAM: initializing for "myuser"
debug1: PAM: setting PAM_RHOST to "some.host.com"
debug1: PAM: setting PAM_TTY to "ssh"
debug1: userauth-request for user myuser service ssh-connection method publickey [preauth]
debug1: attempt 1 failures 0 [preauth]
debug1: userauth_pubkey: test whether pkalg/pkblob are acceptable for RSA-CERT SHA256:jzuBd+ulgpxou9emJu1RRvIn9bf6plMl0E4mhQLHZvU [preauth]
debug1: temporarily_use_uid: 1006/1006 (e=0/0)
debug1: trying authorized principals file /etc/ssh/principals/myuser
debug1: fd 4 clearing O_NONBLOCK
debug1: restore_uid: 0/0
Accepted certificate ID "user_Niels_Kobschaetzki" (serial 0) signed by RSA CA SHA256:dbPkt/BpG+pUiXeMeO387oREZt1WLHrOePiArCNautE via /etc/ssh/user-ca-keys.pub
Postponed publickey for myuser from xxx.xxx.xxx.xxx port 9131 ssh2 [preauth]
debug1: userauth-request for user myuser service ssh-connection method publickey [preauth]
debug1: attempt 2 failures 0 [preauth]
debug1: userauth_pubkey: test whether pkalg/pkblob are acceptable for RSA SHA256:jzuBd+ulgpxou9emJu1RRvIn9bf6plMl0E4mhQLHZvU [preauth]
Failed publickey for myuser from xxx.xxx.xxx.xxx port 9131 ssh2: RSA SHA256:jzuBd+ulgpxou9emJu1RRvIn9bf6plMl0E4mhQLHZvU
Connection closed by xxx.xxx.xxx.xxx port 9131 [preauth]
debug1: do_cleanup [preauth]
debug1: monitor_read_log: child log fd closed
debug1: do_cleanup
debug1: PAM: cleanup
debug1: Killing privsep child 11978

A
Anonymous
June 27, 2022

What is the state of ssh-certificates nowadays? Any progress?

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