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Old 09-02-2019, 02:27 AM
Gilles Gilles is offline
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Join Date: Aug 2019
Posts: 1
"returned incorrect signature type" using SecureCRT agent

Hello.
I upgraded one of my VM to Debian 10. It uses openSSH 7.9 and openSSL:

openssl version
OpenSSL 1.1.1c 28 May 2019

When I connect to this host from another machine, using the SSH agent built in secureCRT, the distant machine issues this:
"agent key RSA SHA256:xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx returned incorrect signature type"

This does not happen when I use an ssh ssh agent from Linux (with the same private key). I also only happens on recent openSSL version.

The connection succeeds, but it show the warning everytime.

ssh -vvv distant_host

OpenSSH_7.9p1 Debian-10, OpenSSL 1.1.1c 28 May 2019
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug2: resolving "XXX" port 22
debug2: ssh_connect_direct
debug1: Connecting to XXX [1.2.3.4] port 22.
debug1: Connection established.
debug1: identity file /home/XXUSERXX/.ssh/id_rsa type -1
debug1: identity file /home/XXUSERXX/.ssh/id_rsa-cert type -1
debug1: identity file /home/XXUSERXX/.ssh/id_dsa type -1
debug1: identity file /home/XXUSERXX/.ssh/id_dsa-cert type -1
debug1: identity file /home/XXUSERXX/.ssh/id_ecdsa type -1
debug1: identity file /home/XXUSERXX/.ssh/id_ecdsa-cert type -1
debug1: identity file /home/XXUSERXX/.ssh/id_ed25519 type -1
debug1: identity file /home/XXUSERXX/.ssh/id_ed25519-cert type -1
debug1: identity file /home/XXUSERXX/.ssh/id_xmss type -1
debug1: identity file /home/XXUSERXX/.ssh/id_xmss-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_7.9p1 Debian-10
debug1: Remote protocol version 2.0, remote software version OpenSSH_7.9p1 Debian-10
debug1: match: OpenSSH_7.9p1 Debian-10 pat OpenSSH* compat 0x04000000
debug2: fd 3 setting O_NONBLOCK
debug1: Authenticating to XXX:22 as 'XXUSERXX'
debug3: hostkeys_foreach: reading file "/home/XXUSERXX/.ssh/known_hosts"
debug3: record_hostkey: found key type ECDSA in file /home/XXUSERXX/.ssh/known_hosts:34
debug3: load_hostkeys: loaded 1 keys from XXX
debug3: order_hostkeyalgs: prefer hostkeyalgs: ecdsa-sha2-nistp256-cert-v01@openssh...01@openssh.com,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521
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,curve25519-sha256@libssh.org,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...01@openssh.com,ssh-ed25519,rsa-sha2-512,rsa-sha2-256,ssh-rsa
debug2: ciphers ctos: chacha20-poly1305@openssh.com,aes128...cm@openssh.com
debug2: ciphers stoc: chacha20-poly1305@openssh.com,aes128...cm@openssh.com
debug2: MACs ctos: umac-64-etm@openssh.com,umac-128-etm...28@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: MACs stoc: umac-64-etm@openssh.com,umac-128-etm...28@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,curve25519-sha256@libssh.org,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
debug2: host key algorithms: rsa-sha2-512,rsa-sha2-256,ssh-rsa,ecdsa-sha2-nistp256,ssh-ed25519
debug2: ciphers ctos: chacha20-poly1305@openssh.com,aes128...cm@openssh.com
debug2: ciphers stoc: chacha20-poly1305@openssh.com,aes128...cm@openssh.com
debug2: MACs ctos: umac-64-etm@openssh.com,umac-128-etm...28@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: MACs stoc: umac-64-etm@openssh.com,umac-128-etm...28@openssh.com,hmac-sha2-256,hmac-sha2-512,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
debug1: kex: host key algorithm: ecdsa-sha2-nistp256
debug1: kex: server->client cipher: chacha20-poly1305@openssh.com MAC: <implicit> compression: none
debug1: kex: client->server cipher: chacha20-poly1305@openssh.com MAC: <implicit> compression: none
debug3: send packet: type 30
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug3: receive packet: type 31
debug1: Server host key: ecdsa-sha2-nistp256 SHA256:qMRLJcKegcc0wjCDIzXNyJ72B+drrlqXPZPg7kLMxZo
debug3: hostkeys_foreach: reading file "/home/XXUSERXX/.ssh/known_hosts"
debug3: record_hostkey: found key type ECDSA in file /home/XXUSERXX/.ssh/known_hosts:34
debug3: load_hostkeys: loaded 1 keys from XXX
debug3: hostkeys_foreach: reading file "/home/XXUSERXX/.ssh/known_hosts"
debug3: record_hostkey: found key type ECDSA in file /home/XXUSERXX/.ssh/known_hosts:35
debug3: load_hostkeys: loaded 1 keys from 1.2.3.4
debug1: Host 'XXX' is known and matches the ECDSA host key.
debug1: Found key in /home/XXUSERXX/.ssh/known_hosts:34
debug3: send packet: type 21
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
debug1: Will attempt key: gbo3 RSA SHA256:Nmq4JpXgT2RvGpu1w8Pof2GBxMJ0oaLr3mDEIDQeOLc agent
debug1: Will attempt key: /home/XXUSERXX/.ssh/id_rsa
debug1: Will attempt key: /home/XXUSERXX/.ssh/id_dsa
debug1: Will attempt key: /home/XXUSERXX/.ssh/id_ecdsa
debug1: Will attempt key: /home/XXUSERXX/.ssh/id_ed25519
debug1: Will attempt key: /home/XXUSERXX/.ssh/id_xmss
debug2: pubkey_prepare: done
debug3: send packet: type 5
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
debug3: receive packet: type 51
debug1: Authentications that can continue: publickey,password
debug3: start over, passed a different list publickey,password
debug3: preferred gssapi-keyex,gssapi-with-mic,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: gbo3 RSA SHA256:Nmq4JpXgT2RvGpu1w8Pof2GBxMJ0oaLr3mDEIDQeOLc agent
debug3: send packet: type 50
debug2: we sent a publickey packet, wait for reply
debug3: receive packet: type 60
debug1: Server accepts key: gbo3 RSA SHA256:Nmq4JpXgT2RvGpu1w8Pof2GBxMJ0oaLr3mDEIDQeOLc agent
debug3: sign_and_send_pubkey: RSA SHA256:Nmq4JpXgT2RvGpu1w8Pof2GBxMJ0oaLr3mDEIDQeOLc
debug3: sign_and_send_pubkey: signing using rsa-sha2-512
agent key RSA SHA256:Nmq4JpXgT2RvGpu1w8Pof2GBxMJ0oaLr3mDEIDQeOLc returned incorrect signature type
debug3: sign_and_send_pubkey: signing using ssh-rsa
debug3: send packet: type 50
debug3: receive packet: type 52
debug1: Authentication succeeded (publickey).
Authenticated to XXX ([1.2.3.4]:22).
debug1: channel 0: new [client-session]
debug3: ssh_session2_open: channel_new: 0
debug2: channel 0: send open
debug3: send packet: type 90
debug1: Requesting no-more-sessions@openssh.com
debug3: send packet: type 80
debug1: Entering interactive session.
debug1: pledge: network
debug3: receive packet: type 80
debug1: client_input_global_request: rtype hostkeys-00@openssh.com want_reply 0
debug3: receive packet: type 4
debug1: Remote: /home/XXUSERXX/.ssh/authorized_keys:1: key options: agent-forwarding port-forwarding pty user-rc x11-forwarding
debug3: receive packet: type 4
debug1: Remote: /home/XXUSERXX/.ssh/authorized_keys:1: key options: agent-forwarding port-forwarding pty user-rc x11-forwarding
debug3: receive packet: type 91
debug2: channel_input_open_confirmation: channel 0: callback start
debug2: fd 3 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
debug3: send packet: type 98
debug1: Sending environment.
debug3: Ignored env SHELL
debug3: Ignored env HISTCONTROL
debug3: Ignored env TMUX
debug3: Ignored env LANGUAGE
debug3: Ignored env SSH_AUTH_SOCK
debug3: Ignored env EDITOR
debug3: Ignored env PWD
debug3: Ignored env LOGNAME
debug3: Ignored env XDG_SESSION_TYPE
debug3: Ignored env MC_TMPDIR
debug3: Ignored env LS_OPTIONS
debug3: Ignored env MC_SID
debug3: Ignored env HOME
debug1: Sending env LANG = en_US.UTF8
debug2: channel 0: request env confirm 0
debug3: send packet: type 98
debug3: Ignored env LS_COLORS
debug3: Ignored env SSH_CONNECTION
debug3: Ignored env XDG_SESSION_CLASS
debug3: Ignored env TERM
debug3: Ignored env USER
debug3: Ignored env TMUX_PANE
debug3: Ignored env SHLVL
debug3: Ignored env XDG_SESSION_ID
debug3: Ignored env XDG_RUNTIME_DIR
debug3: Ignored env NODE_PATH
debug3: Ignored env SSH_CLIENT
debug3: Ignored env PATH
debug1: Sending environment.
debug3: Ignored env SHELL
debug3: Ignored env HISTCONTROL
debug3: Ignored env TMUX
debug3: Ignored env LANGUAGE
debug3: Ignored env SSH_AUTH_SOCK
debug3: Ignored env EDITOR
debug3: Ignored env PWD
debug3: Ignored env LOGNAME
debug3: Ignored env XDG_SESSION_TYPE
debug3: Ignored env MC_TMPDIR
debug3: Ignored env LS_OPTIONS
debug3: Ignored env MC_SID
debug3: Ignored env HOME
debug1: Sending env LANG = en_US.UTF8
debug2: channel 0: request env confirm 0
debug3: send packet: type 98
debug3: Ignored env LS_COLORS
debug3: Ignored env SSH_CONNECTION
debug3: Ignored env XDG_SESSION_CLASS
debug3: Ignored env TERM
debug3: Ignored env USER
debug3: Ignored env TMUX_PANE
debug3: Ignored env SHLVL
debug3: Ignored env XDG_SESSION_ID
debug3: Ignored env XDG_RUNTIME_DIR
debug3: Ignored env NODE_PATH
debug3: Ignored env SSH_CLIENT
debug3: Ignored env PATH
debug3: Ignored env DBUS_SESSION_BUS_ADDRESS
debug3: Ignored env MAIL
debug3: Ignored env SSH_TTY
debug3: Ignored env OLDPWD
debug3: Ignored env _
debug2: channel 0: request shell confirm 1
debug3: send packet: type 98
debug2: channel_input_open_confirmation: channel 0: callback done
debug2: channel 0: open confirm rwindow 0 rmax 32768
debug3: receive packet: type 99
debug2: channel_input_status_confirm: type 99 id 0
debug2: PTY allocation request accepted on channel 0
debug2: channel 0: rcvd adjust 2097152
debug3: receive packet: type 99
debug2: channel_input_status_confirm: type 99 id 0
debug2: shell request accepted on channel 0
Linux XXX 4.19.0-5-amd64 #1 SMP Debian 4.19.37-5+deb10u2 (2019-08-08) x86_64

The programs included with the Debian GNU/Linux system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.

Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
permitted by applicable law.
Last login: Mon Sep 2 09:22:25 2019 from 123.123.123.123
09:22:32 XXUSERXX(1.22.57.8)@XXX(123.123.123.123)
~$ debug2: client_check_window_change: changed
debug2: channel 0: request window-change confirm 0
debug3: send packet: type 98
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  #2  
Old 10-08-2019, 03:45 PM
ashiosee ashiosee is offline
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Join Date: Oct 2019
Posts: 19
For those who might be experiencing this same issue, SecureCRT's agent support currently does not implement the rsa-sha2-256 and rsa-sha2-512 signature algorithms that are possible with newer versions of OpenSSH.

A feature request has been recorded, and we will post here should a version of SecureCRT become available with this functionality.
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