git.launchpad.net hangs forever when presented with an ed25519 key

[Bert JW Regeer]

user$ ssh git.launchpad.net -l bregeer-ctl -vvvv -i /Users/user/.ssh/id_ed25519
OpenSSH_6.9p1, LibreSSL 2.1.8
debug1: Reading configuration data /Users/user/.ssh/config
debug1: /Users/user/.ssh/config line 1: Applying options for *
debug1: /Users/user/.ssh/config line 5: Applying options for git.launchpad.net
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 21: Applying options for *
debug1: /etc/ssh/ssh_config line 56: Applying options for *
debug2: ssh_connect: needpriv 0
debug1: Connecting to git.launchpad.net [162.213.33.96] port 22.
debug1: Connection established.
debug1: identity file /Users/user/.ssh/id_ed25519 type 4
debug1: key_load_public: No such file or directory
debug1: identity file /Users/user/.ssh/id_ed25519-cert type -1
debug1: identity file /Users/user/.ssh/id_rsa type 1
debug1: key_load_public: No such file or directory
debug1: identity file /Users/user/.ssh/id_rsa-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_6.9
debug1: Remote protocol version 2.0, remote software version Twisted
debug1: no match: Twisted
debug2: fd 5 setting O_NONBLOCK
debug1: Authenticating to git.launchpad.net:22 as 'bregeer-ctl'
debug3: hostkeys_foreach: reading file "/Users/user/.ssh/known_hosts"
debug3: record_hostkey: found key type RSA in file /Users/user/.ssh/known_hosts:103
debug3: load_hostkeys: loaded 1 keys from git.launchpad.net
debug3: order_hostkeyalgs: prefer hostkeyalgs: <email address hidden>,<email address hidden>,ssh-rsa
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug2: kex_parse_kexinit: <email address hidden>,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
debug2: kex_parse_kexinit: <email address hidden>,<email address hidden>,ssh-rsa,<email address hidden>,<email address hidden>,<email address hidden>,<email address hidden>,<email address hidden>,<email address hidden>,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed25519,ssh-dss
debug2: kex_parse_kexinit: <email address hidden>,aes128-ctr,aes192-ctr,aes256-ctr,<email address hidden>,<email address hidden>,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,<email address hidden>
debug2: kex_parse_kexinit: <email address hidden>,aes128-ctr,aes192-ctr,aes256-ctr,<email address hidden>,<email address hidden>,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,<email address hidden>
debug2: kex_parse_kexinit: <email address hidden>,<email address hidden>,<email address hidden>,<email address hidden>,<email address hidden>,<email address hidden>,<email address hidden>,hmac-sha2-256,hmac-sha2-512,hmac-sha1,<email address hidden>,<email address hidden>,<email address hidden>,<email address hidden>,hmac-md5,hmac-ripemd160,<email address hidden>,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: <email address hidden>,<email address hidden>,<email address hidden>,<email address hidden>,<email address hidden>,<email address hidden>,<email address hidden>,hmac-sha2-256,hmac-sha2-512,hmac-sha1,<email address hidden>,<email address hidden>,<email address hidden>,<email address hidden>,hmac-md5,hmac-ripemd160,<email address hidden>,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none,<email address hidden>,zlib
debug2: kex_parse_kexinit: none,<email address hidden>,zlib
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit: first_kex_follows 0
debug2: kex_parse_kexinit: reserved 0
debug2: kex_parse_kexinit: diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1,diffie-hellman-group14-sha1
debug2: kex_parse_kexinit: ssh-rsa
debug2: kex_parse_kexinit: aes256-ctr,aes256-cbc,aes192-ctr,aes192-cbc,aes128-ctr,aes128-cbc,cast128-ctr,cast128-cbc,blowfish-ctr,blowfish-cbc,3des-ctr,3des-cbc
debug2: kex_parse_kexinit: aes256-ctr,aes256-cbc,aes192-ctr,aes192-cbc,aes128-ctr,aes128-cbc,cast128-ctr,cast128-cbc,blowfish-ctr,blowfish-cbc,3des-ctr,3des-cbc
debug2: kex_parse_kexinit: hmac-sha2-512,hmac-sha2-256,hmac-sha1,hmac-md5
debug2: kex_parse_kexinit: hmac-sha2-512,hmac-sha2-256,hmac-sha1,hmac-md5
debug2: kex_parse_kexinit: none,zlib
debug2: kex_parse_kexinit: none,zlib
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit: first_kex_follows 0
debug2: kex_parse_kexinit: reserved 0
debug1: kex: server->client aes128-ctr hmac-sha2-256 none
debug1: kex: client->server aes128-ctr hmac-sha2-256 none
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<8192<8192) sent
debug1: got SSH2_MSG_KEX_DH_GEX_GROUP
debug2: bits set: 4174/8192
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug1: got SSH2_MSG_KEX_DH_GEX_REPLY
debug1: Server host key: ssh-rsa SHA256:UNOzlP66WpDuEo34Wgs8mewypV0UzqHLsIFoqwe8dYo
debug3: hostkeys_foreach: reading file "/Users/user/.ssh/known_hosts"
debug3: record_hostkey: found key type RSA in file /Users/user/.ssh/known_hosts:103
debug3: load_hostkeys: loaded 1 keys from git.launchpad.net
debug3: hostkeys_foreach: reading file "/Users/user/.ssh/known_hosts"
debug3: record_hostkey: found key type RSA in file /Users/user/.ssh/known_hosts:104
debug3: load_hostkeys: loaded 1 keys from 162.213.33.96
debug1: Host 'git.launchpad.net' is known and matches the RSA host key.
debug1: Found key in /Users/user/.ssh/known_hosts:103
debug2: bits set: 4155/8192
debug2: set_newkeys: mode 1
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug2: set_newkeys: mode 0
debug1: SSH2_MSG_NEWKEYS received
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug2: service_accept: ssh-userauth
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug2: key: /Users/user/.ssh/id_ed25519 (0x7fa05b40f840), explicit
debug2: key: /Users/user/.ssh/id_rsa (0x7fa05b40fbf0), explicit
debug1: Authentications that can continue: publickey
debug3: start over, passed a different list publickey
debug3: preferred 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 ED25519 public key: /Users/user/.ssh/id_ed25519
debug3: send_pubkey_test
debug2: we sent a publickey packet, wait for reply

Note, I had to use -i for the ed25519 identity file on the command line because I updated my ~/.ssh/config to include explicitly setting it to the rsa key:

Host git.launchpad.net
    IdentityFile ~/.ssh/id_rsa

With that I get the following:

Bones:.ssh user$ ssh git.launchpad.net -l bregeer-ctl -vvvv
OpenSSH_6.9p1, LibreSSL 2.1.8
debug1: Reading configuration data /Users/user/.ssh/config
debug1: /Users/user/.ssh/config line 1: Applying options for *
debug1: /Users/user/.ssh/config line 5: Applying options for git.launchpad.net
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 21: Applying options for *
debug1: /etc/ssh/ssh_config line 56: Applying options for *
debug2: ssh_connect: needpriv 0
debug1: Connecting to git.launchpad.net [162.213.33.96] port 22.
debug1: Connection established.
debug1: identity file /Users/user/.ssh/id_rsa type 1
debug1: key_load_public: No such file or directory
debug1: identity file /Users/user/.ssh/id_rsa-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_6.9
debug1: Remote protocol version 2.0, remote software version Twisted
debug1: no match: Twisted
debug2: fd 5 setting O_NONBLOCK
debug1: Authenticating to git.launchpad.net:22 as 'bregeer-ctl'
debug3: hostkeys_foreach: reading file "/Users/user/.ssh/known_hosts"
debug3: record_hostkey: found key type RSA in file /Users/user/.ssh/known_hosts:103
debug3: load_hostkeys: loaded 1 keys from git.launchpad.net
debug3: order_hostkeyalgs: prefer hostkeyalgs: <email address hidden>,<email address hidden>,ssh-rsa
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug2: kex_parse_kexinit: <email address hidden>,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
debug2: kex_parse_kexinit: <email address hidden>,<email address hidden>,ssh-rsa,<email address hidden>,<email address hidden>,<email address hidden>,<email address hidden>,<email address hidden>,<email address hidden>,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed25519,ssh-dss
debug2: kex_parse_kexinit: <email address hidden>,aes128-ctr,aes192-ctr,aes256-ctr,<email address hidden>,<email address hidden>,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,<email address hidden>
debug2: kex_parse_kexinit: <email address hidden>,aes128-ctr,aes192-ctr,aes256-ctr,<email address hidden>,<email address hidden>,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,<email address hidden>
debug2: kex_parse_kexinit: <email address hidden>,<email address hidden>,<email address hidden>,<email address hidden>,<email address hidden>,<email address hidden>,<email address hidden>,hmac-sha2-256,hmac-sha2-512,hmac-sha1,<email address hidden>,<email address hidden>,<email address hidden>,<email address hidden>,hmac-md5,hmac-ripemd160,<email address hidden>,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: <email address hidden>,<email address hidden>,<email address hidden>,<email address hidden>,<email address hidden>,<email address hidden>,<email address hidden>,hmac-sha2-256,hmac-sha2-512,hmac-sha1,<email address hidden>,<email address hidden>,<email address hidden>,<email address hidden>,hmac-md5,hmac-ripemd160,<email address hidden>,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none,<email address hidden>,zlib
debug2: kex_parse_kexinit: none,<email address hidden>,zlib
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit: first_kex_follows 0
debug2: kex_parse_kexinit: reserved 0
debug2: kex_parse_kexinit: diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1,diffie-hellman-group14-sha1
debug2: kex_parse_kexinit: ssh-rsa
debug2: kex_parse_kexinit: aes256-ctr,aes256-cbc,aes192-ctr,aes192-cbc,aes128-ctr,aes128-cbc,cast128-ctr,cast128-cbc,blowfish-ctr,blowfish-cbc,3des-ctr,3des-cbc
debug2: kex_parse_kexinit: aes256-ctr,aes256-cbc,aes192-ctr,aes192-cbc,aes128-ctr,aes128-cbc,cast128-ctr,cast128-cbc,blowfish-ctr,blowfish-cbc,3des-ctr,3des-cbc
debug2: kex_parse_kexinit: hmac-sha2-512,hmac-sha2-256,hmac-sha1,hmac-md5
debug2: kex_parse_kexinit: hmac-sha2-512,hmac-sha2-256,hmac-sha1,hmac-md5
debug2: kex_parse_kexinit: none,zlib
debug2: kex_parse_kexinit: none,zlib
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit: first_kex_follows 0
debug2: kex_parse_kexinit: reserved 0
debug1: kex: server->client aes128-ctr hmac-sha2-256 none
debug1: kex: client->server aes128-ctr hmac-sha2-256 none
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<8192<8192) sent
debug1: got SSH2_MSG_KEX_DH_GEX_GROUP
debug2: bits set: 4126/8192
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug1: got SSH2_MSG_KEX_DH_GEX_REPLY
debug1: Server host key: ssh-rsa SHA256:UNOzlP66WpDuEo34Wgs8mewypV0UzqHLsIFoqwe8dYo
debug3: hostkeys_foreach: reading file "/Users/user/.ssh/known_hosts"
debug3: record_hostkey: found key type RSA in file /Users/user/.ssh/known_hosts:103
debug3: load_hostkeys: loaded 1 keys from git.launchpad.net
debug3: hostkeys_foreach: reading file "/Users/user/.ssh/known_hosts"
debug3: record_hostkey: found key type RSA in file /Users/user/.ssh/known_hosts:104
debug3: load_hostkeys: loaded 1 keys from 162.213.33.96
debug1: Host 'git.launchpad.net' is known and matches the RSA host key.
debug1: Found key in /Users/user/.ssh/known_hosts:103
debug2: bits set: 4061/8192
debug2: set_newkeys: mode 1
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug2: set_newkeys: mode 0
debug1: SSH2_MSG_NEWKEYS received
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug2: service_accept: ssh-userauth
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug2: key: /Users/user/.ssh/id_rsa (0x7facd840ed10), explicit
debug2: key: /Users/user/.ssh/id_ed25519 (0x7facd8614310),
debug1: Authentications that can continue: publickey
debug3: start over, passed a different list publickey
debug3: preferred 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 RSA public key: /Users/user/.ssh/id_rsa
debug3: send_pubkey_test
debug2: we sent a publickey packet, wait for reply
debug1: Server accepts key: pkalg ssh-rsa blen 279
debug2: input_userauth_pk_ok: fp SHA256:cmB3CELceJoOdweuWGRnUjFc1DTjGhEeDz5wQREDfIw
debug3: sign_and_send_pubkey: RSA SHA256:cmB3CELceJoOdweuWGRnUjFc1DTjGhEeDz5wQREDfIw
debug1: Authentication succeeded (publickey).
Authenticated to git.launchpad.net ([162.213.33.96]:22).
debug1: channel 0: new [client-session]
debug3: ssh_session2_open: channel_new: 0
debug2: channel 0: send open
debug1: Entering interactive session.
debug2: callback start
debug2: fd 5 setting TCP_NODELAY
debug3: ssh_packet_set_tos: set IP_TOS 0x10
debug2: client_session2_setup: id 0
debug2: channel 0: request pty-req confirm 1
debug1: Sending environment.
debug3: Ignored env TERM_PROGRAM
debug3: Ignored env TERM
debug3: Ignored env SHELL
debug3: Ignored env TMPDIR
debug3: Ignored env Apple_PubSub_Socket_Render
debug3: Ignored env TERM_PROGRAM_VERSION
debug3: Ignored env TERM_SESSION_ID
debug3: Ignored env TOX_PATH
debug3: Ignored env USER
debug3: Ignored env SSH_AUTH_SOCK
debug3: Ignored env __CF_USER_TEXT_ENCODING
debug3: Ignored env PATH
debug3: Ignored env PWD
debug3: Ignored env EDITOR
debug1: Sending env LANG = en_US.UTF-8
debug2: channel 0: request env confirm 0
debug3: Ignored env XPC_FLAGS
debug3: Ignored env XPC_SERVICE_NAME
debug3: Ignored env HOME
debug3: Ignored env SHLVL
debug3: Ignored env LOGNAME
debug3: Ignored env DISPLAY
debug3: Ignored env SECURITYSESSIONID
debug3: Ignored env _
debug2: channel 0: request shell confirm 1
debug2: callback done
debug2: channel 0: open confirm rwindow 131072 rmax 32768
debug2: channel_input_status_confirm: type 99 id 0
debug2: PTY allocation request accepted on channel 0
debug2: channel 0: rcvd ext data 27
debug2: channel 0: rcvd close
debug2: channel 0: output open -> drain
debug2: channel 0: close_read
debug2: channel 0: input open -> closed
debug2: channel_input_status_confirm: type 99 id 0
debug2: shell request accepted on channel 0
debug3: channel 0: will not send data after close
debug2: channel 0: obuf_empty delayed efd 9/(27)
No shells on this server.
debug2: channel 0: written 27 to efd 9
debug3: channel 0: will not send data after close
debug2: channel 0: obuf empty
debug2: channel 0: close_write
debug2: channel 0: output drain -> closed
debug2: channel 0: almost dead
debug2: channel 0: gc: notify user
debug2: channel 0: gc: user detached
debug2: channel 0: send close
debug2: channel 0: is dead
debug2: channel 0: garbage collecting
debug1: channel 0: free: client-session, nchannels 1
debug3: channel 0: status: The following connections are open:
  #0 client-session (t4 r0 i3/0 o3/0 fd -1/-1 cc -1)

Connection to git.launchpad.net closed.
Transferred: sent 4648, received 3776 bytes, in 0.2 seconds
Bytes per second: sent 20127.1, received 16351.1
debug1: Exit status -1