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Error 'Permission denied (publickey).' while connecting to AWS SSH #1116

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alexeybut opened this issue May 8, 2023 · 1 comment · Fixed by #1177
Closed

Error 'Permission denied (publickey).' while connecting to AWS SSH #1116

alexeybut opened this issue May 8, 2023 · 1 comment · Fixed by #1177
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RSA SHA-2
Milestone
2023.0.0

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@alexeybut
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Renci.SshNet.Common.SshAuthenticationException: 'Permission denied (publickey).' occurs while connecting to Amazon Linux AWS instance.
SSH and Putty connect to this server without any problem.
Client OS - Windows 10 x64, .net6, ssh.net 2022.0.2
ssh output:

ssh.exe -vvv -i "key.pem" ec2-user@ec2-xxx.amazonaws.com

OpenSSH_9.0p1, OpenSSL 1.1.1p  21 Jun 2022
debug1: Reading configuration data /etc/ssh/ssh_config
debug3: expanded UserKnownHostsFile '~/.ssh/known_hosts' -> '/c/Users/xxx/.ssh/known_hosts'
debug3: expanded UserKnownHostsFile '~/.ssh/known_hosts2' -> '/c/Users/xxx/.ssh/known_hosts2'
debug2: resolving "ec2-xxx.amazonaws.com" port 22
debug3: resolve_host: lookup ec2-xxx.amazonaws.com:22
debug3: ssh_connect_direct: entering
debug1: Connecting to ec2-xxx.amazonaws.com [54.xxx.240.111] port 22.
debug3: set_sock_tos: set socket 4 IP_TOS 0x48
debug1: Connection established.
debug1: identity file E:\\Amazon\\key.pem type -1
debug1: identity file E:\\Amazon\\key.pem-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_9.0
debug1: Remote protocol version 2.0, remote software version OpenSSH_8.7
debug1: compat_banner: match: OpenSSH_8.7 pat OpenSSH* compat 0x04000000
debug2: fd 4 setting O_NONBLOCK
debug1: Authenticating to ec2-xxx.amazonaws.com:22 as 'ec2-user'
debug3: record_hostkey: found key type ED25519 in file /c/Users/xxx/.ssh/known_hosts:4
debug3: record_hostkey: found key type ECDSA in file /c/Users/xxx/.ssh/known_hosts:5
debug3: load_hostkeys_file: loaded 2 keys from ec2-xxx.amazonaws.com
debug1: load_hostkeys: fopen /c/Users/xxx/.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
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: sntrup761x25519-sha512@openssh.com,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,ext-info-c
debug2: host key algorithms: ssh-ed25519-cert-v01@openssh.com,ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-sha2-nistp384-cert-v01@openssh.com,ecdsa-sha2-nistp521-cert-v01@openssh.com,sk-ssh-ed25519-cert-v01@openssh.com,sk-ecdsa-sha2-nistp256-cert-v01@openssh.com,rsa-sha2-512-cert-v01@openssh.com,rsa-sha2-256-cert-v01@openssh.com,ssh-ed25519,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,sk-ssh-ed25519@openssh.com,sk-ecdsa-sha2-nistp256@openssh.com,rsa-sha2-512,rsa-sha2-256
debug2: ciphers ctos: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com
debug2: ciphers stoc: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.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,curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group14-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512
debug2: host key algorithms: ecdsa-sha2-nistp256,ssh-ed25519
debug2: ciphers ctos: aes256-gcm@openssh.com,chacha20-poly1305@openssh.com,aes256-ctr,aes128-gcm@openssh.com,aes128-ctr
debug2: ciphers stoc: aes256-gcm@openssh.com,chacha20-poly1305@openssh.com,aes256-ctr,aes128-gcm@openssh.com,aes128-ctr
debug2: MACs ctos: hmac-sha2-256-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha2-256,hmac-sha1,umac-128@openssh.com,hmac-sha2-512
debug2: MACs stoc: hmac-sha2-256-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha2-256,hmac-sha1,umac-128@openssh.com,hmac-sha2-512
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: ssh-ed25519
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: SSH2_MSG_KEX_ECDH_REPLY received
debug1: Server host key: ssh-ed25519 SHA256:r7Aez12NhVjT4TaPMPLO+QrTWm5Mwi1Eiis3lgjxcE4
debug3: record_hostkey: found key type ED25519 in file /c/Users/xxx/.ssh/known_hosts:4
debug3: record_hostkey: found key type ECDSA in file /c/Users/xxx/.ssh/known_hosts:5
debug3: load_hostkeys_file: loaded 2 keys from ec2-xxx.amazonaws.com
debug1: load_hostkeys: fopen /c/Users/xxx/.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 'ec2-xxx.amazonaws.com' is known and matches the ED25519 host key.
debug1: Found key in /c/Users/xxx/.ssh/known_hosts:4
debug3: send packet: type 21
debug2: ssh_set_newkeys: mode 1
debug1: rekey out after 134217728 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug3: receive packet: type 21
debug1: SSH2_MSG_NEWKEYS received
debug2: ssh_set_newkeys: mode 0
debug1: rekey in after 134217728 blocks
debug1: Will attempt key: key.pem  explicit
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,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-nistp256@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-keyex,gssapi-with-mic
debug3: start over, passed a different list publickey,gssapi-keyex,gssapi-with-mic
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: Trying private key: key.pem
debug3: sign_and_send_pubkey: using publickey with RSA SHA256:05GwOkwa74XFyzi+37mNV1oq9uagMv+IAj8OJ1eyeVU
debug3: sign_and_send_pubkey: signing using rsa-sha2-512 SHA256:05GwOkwa74XFyzi+37mNV1oq9uagMv+IAj8OJ1eyeVU
debug3: send packet: type 50
debug2: we sent a publickey packet, wait for reply
debug3: receive packet: type 52
Authenticated to ec2-xxx.amazonaws.com ([54.xxx.240.111]:22) using "publickey".
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: filesystem
debug3: receive packet: type 80
debug1: client_input_global_request: rtype hostkeys-00@openssh.com want_reply 0
debug3: client_input_hostkeys: received ECDSA key SHA256:NcWBX8ZbscSZ3LL1vawtZ7Kzu7zpOa2DspdROVdPYYU
debug3: client_input_hostkeys: received ED25519 key SHA256:r7Aez12NhVjT4TaPMPLO+QrTWm5Mwi1Eiis3lgjxcE4
debug1: client_input_hostkeys: searching /c/Users/xxx/.ssh/known_hosts for ec2-xxx.amazonaws.com / (none)
debug3: hostkeys_foreach: reading file "/c/Users/xxx/.ssh/known_hosts"
debug3: hostkeys_find: found ssh-ed25519 key at /c/Users/xxx/.ssh/known_hosts:4
debug3: hostkeys_find: found ecdsa-sha2-nistp256 key at /c/Users/xxx/.ssh/known_hosts:5
debug1: client_input_hostkeys: searching /c/Users/xxx/.ssh/known_hosts2 for ec2-xxx.amazonaws.com / (none)
debug1: client_input_hostkeys: hostkeys file /c/Users/xxx/.ssh/known_hosts2 does not exist
debug3: client_input_hostkeys: 2 server keys: 0 new, 2 retained, 0 incomplete match. 0 to remove
debug1: client_input_hostkeys: no new or deprecated keys from server
debug3: receive packet: type 4
debug1: Remote: /home/ec2-user/.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 4 setting TCP_NODELAY
debug3: set_sock_tos: set socket 4 IP_TOS 0x48
debug2: client_session2_setup: id 0
debug2: channel 0: request pty-req confirm 1
debug3: send packet: type 98
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
   ,     #_
   ~\_  ####_        Amazon Linux 2023
  ~~  \_#####\
  ~~     \###|
  ~~       \#/ ___   https://aws.amazon.com/linux/amazon-linux-2023
   ~~       V~' '->
    ~~~         /
      ~~._.   _/
         _/ _/
       _/m/'
Last login: Mon May  8 10:51:14 2023 from 185.xxx.155.152
[ec2-user@ip-172-xxx-92-171 ~]$
@WojciechNagorski WojciechNagorski added this to the 2023.0.0 milestone Sep 13, 2023
@Rob-Hague Rob-Hague mentioned this issue Sep 16, 2023
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@WojciechNagorski
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Version 2023.0.0 has been published https://www.nuget.org/packages/SSH.NET/2023.0.0

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RSA SHA-2
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Milestone
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Add support for RSA SHA-2 public key algorithms Rob-Hague/SSH.NET
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@alexeybut @WojciechNagorski