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Date:      Sun, 11 Dec 2022 00:35:26 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 268186] Kerberos authentication fails with a Linux/FreeIPA KDC
Message-ID:  <bug-268186-227-yyMcegLuTn@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-268186-227@https.bugs.freebsd.org/bugzilla/>
References:  <bug-268186-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D268186

--- Comment #16 from amendlik@gmail.com ---
I'm trying to eliminate version mismatches by logging on to SSH from the sa=
me
host, so the client and server are the same system. The only other server
involved is the KDC, which is running Linux and FreeIPA.

Here is the log from the SSH client:

OpenSSH_8.8p1, OpenSSL 1.1.1o-freebsd  3 May 2022

debug1: Reading configuration data /etc/ssh/ssh_config
debug3: kex names ok:
[curve25519-sha256@libssh.org,diffie-hellman-group-exchange-sha256,diffie-h=
ellman-group-exchange-sha1,diffie-hellman-group14-sha1]
debug3: expanded UserKnownHostsFile '~/.ssh/known_hosts' ->
'/home/********/.ssh/known_hosts'
debug3: expanded UserKnownHostsFile '~/.ssh/known_hosts2' ->
'/home/********/.ssh/known_hosts2'
debug1: Executing proxy command: exec /usr/local/bin/sss_ssh_knownhostsprox=
y -p
22 **************
debug1: identity file /home/********/.ssh/id_rsa type -1
debug1: identity file /home/********/.ssh/id_rsa-cert type -1
debug1: identity file /home/********/.ssh/id_dsa type -1
debug1: identity file /home/********/.ssh/id_dsa-cert type -1
debug1: identity file /home/********/.ssh/id_ecdsa type -1
debug1: identity file /home/********/.ssh/id_ecdsa-cert type -1
debug1: identity file /home/********/.ssh/id_ecdsa_sk type -1
debug1: identity file /home/********/.ssh/id_ecdsa_sk-cert type -1
debug1: identity file /home/********/.ssh/id_ed25519 type -1
debug1: identity file /home/********/.ssh/id_ed25519-cert type -1
debug1: identity file /home/********/.ssh/id_ed25519_sk type -1
debug1: identity file /home/********/.ssh/id_ed25519_sk-cert type -1
debug1: identity file /home/********/.ssh/id_xmss type -1
debug1: identity file /home/********/.ssh/id_xmss-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_8.8 FreeBSD-20211221
debug1: Remote protocol version 2.0, remote software version OpenSSH_8.8
FreeBSD-20211221
debug1: Fssh_compat_banner: match: OpenSSH_8.8 FreeBSD-20211221 pat OpenSSH*
compat 0x04000000
debug2: fd 7 setting O_NONBLOCK
debug2: fd 6 setting O_NONBLOCK
debug1: Authenticating to **************:22 as '********'
debug3: Fssh_record_hostkey: found key type ED25519 in file
/home/********/.ssh/known_hosts:3
debug3: Fssh_load_hostkeys_file: loaded 1 keys from **************
debug1: Fssh_load_hostkeys: fopen /home/********/.ssh/known_hosts2: No such
file or directory
debug3: order_hostkeyalgs: have matching best-preference key type
ssh-ed25519-cert-v01@openssh.com, using HostkeyAlgorithms verbatim
debug3: send packet: type 20
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@libssh.org,diffie-hellman-group-exchange-sha256,diffie-he=
llman-group-exchange-sha1,diffie-hellman-group14-sha1,ext-info-c
debug2: host key algorithms:
ssh-ed25519-cert-v01@openssh.com,ecdsa-sha2-nistp256-cert-v01@openssh.com,e=
cdsa-sha2-nistp384-cert-v01@openssh.com,ecdsa-sha2-nistp521-cert-v01@openss=
h.com,sk-ssh-ed25519-cert-v01@openssh.com,sk-ecdsa-sha2-nistp256-cert-v01@o=
penssh.com,rsa-sha2-512-cert-v01@openssh.com,rsa-sha2-256-cert-v01@openssh.=
com,ssh-rsa-cert-v01@openssh.com,ssh-ed25519,ecdsa-sha2-nistp256,ecdsa-sha2=
-nistp384,ecdsa-sha2-nistp521,sk-ssh-ed25519@openssh.com,sk-ecdsa-sha2-nist=
p256@openssh.com,rsa-sha2-512,rsa-sha2-256,ssh-rsa
debug2: ciphers ctos:
chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@o=
penssh.com,aes256-gcm@openssh.com
debug2: ciphers stoc:
chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@o=
penssh.com,aes256-gcm@openssh.com
debug2: MACs ctos:
umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.=
com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh=
.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: MACs stoc:
umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.=
com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh=
.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: compression ctos: none,zlib@openssh.com,zlib
debug2: compression stoc: none,zlib@openssh.com,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,diffie-hellman-group-exchange-sha256
debug2: host key algorithms:
rsa-sha2-512,rsa-sha2-256,ssh-rsa,ecdsa-sha2-nistp256,ssh-ed25519
debug2: ciphers ctos: aes256-ctr,aes192-ctr,aes128-ctr
debug2: ciphers stoc: aes256-ctr,aes192-ctr,aes128-ctr
debug2: MACs ctos: hmac-sha1
debug2: MACs stoc: hmac-sha1
debug2: compression ctos: none,zlib@openssh.com
debug2: compression stoc: none,zlib@openssh.com
debug2: languages ctos:
debug2: languages stoc:
debug2: first_kex_follows 0
debug2: reserved 0
debug1: kex: algorithm: curve25519-sha256@libssh.org
debug1: kex: host key algorithm: ssh-ed25519
debug1: kex: server->client cipher: aes128-ctr MAC: hmac-sha1 compression: =
none
debug1: kex: client->server cipher: aes128-ctr MAC: hmac-sha1 compression: =
none
debug3: send packet: type 30
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug3: receive packet: type 31
debug1: SSH2_MSG_KEX_ECDH_REPLY received
debug1: Server host key: ssh-ed25519
SHA256:qsH5DlfcvjRaiyO43GHO135fwfsyFTHDji2EIsTp9r4
debug3: verify_host_key_dns
DNS lookup error: general failure
debug3: Fssh_record_hostkey: found key type ED25519 in file
/home/********/.ssh/known_hosts:3
debug3: Fssh_load_hostkeys_file: loaded 1 keys from **************
debug1: Fssh_load_hostkeys: fopen /home/********/.ssh/known_hosts2: No such
file or directory
debug1: Host '**************' is known and matches the ED25519 host key.
debug1: Found key in /home/********/.ssh/known_hosts:3
debug3: send packet: type 21
debug2: set_newkeys: mode 1
debug1: rekey out after 4294967296 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 in after 4294967296 blocks
debug1: Will attempt key: /home/********/.ssh/id_rsa RSA
SHA256:f62xqkxo+DJNCEgqxXTFp6JyduHfzliOxWdWMFwQsIw agent
debug1: Will attempt key: /home/********/.ssh/id_rsa
debug1: Will attempt key: /home/********/.ssh/id_dsa
debug1: Will attempt key: /home/********/.ssh/id_ecdsa
debug1: Will attempt key: /home/********/.ssh/id_ecdsa_sk
debug1: Will attempt key: /home/********/.ssh/id_ed25519
debug1: Will attempt key: /home/********/.ssh/id_ed25519_sk
debug1: Will attempt key: /home/********/.ssh/id_xmss
debug2: pubkey_prepare: done
debug3: send packet: type 5
debug3: receive packet: type 7
debug1: SSH2_MSG_EXT_INFO received
debug1: Fssh_kex_input_ext_info:
server-sig-algs=3D<ssh-ed25519,sk-ssh-ed25519@openssh.com,ssh-rsa,rsa-sha2-=
256,rsa-sha2-512,ssh-dss,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2=
-nistp521,sk-ecdsa-sha2-nistp256@openssh.com,webauthn-sk-ecdsa-sha2-nistp25=
6@openssh.com>
debug3: receive packet: type 6
debug2: service_accept: ssh-userauth
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug3: send packet: type 50
debug3: receive packet: type 51
debug1: Authentications that can continue: publickey,gssapi-with-mic
debug3: start over, passed a different list publickey,gssapi-with-mic
debug3: preferred gssapi-with-mic,keyboard-interactive
debug3: authmethod_lookup gssapi-with-mic
debug3: remaining preferred: keyboard-interactive
debug3: authmethod_is_enabled gssapi-with-mic
debug1: Next authentication method: gssapi-with-mic
debug3: send packet: type 50
debug2: we sent a gssapi-with-mic packet, wait for reply
debug3: receive packet: type 60
debug1: Delegating credentials
debug3: send packet: type 61
debug3: receive packet: type 51
debug1: Authentications that can continue: publickey,gssapi-with-mic
debug2: we did not send a packet, disable method
debug1: No more authentication methods to try.

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