**"OpenSSH for Windows" version**
`((Get-Item (Get-Command sshd).Source).Versi…onInfo.FileVersion)`
7.7.2.2
**Server OperatingSystem**
`((Get-ItemProperty "HKLM:\SOFTWARE\Microsoft\Windows nt\CurrentVersion\" -Name ProductName).ProductName)`
Windows Server 2019 Standard
**Client OperatingSystem**
macOS Mojave Version 10.14.1
ssh -V
OpenSSH_7.8p1, LibreSSL 2.7.3
**What is failing**
PubKey Authentication with ed25519
**Expected output**
Successful Login over PubKey
**Actual output**
Permission Denied
** Additional Data**
Currently I'm trying to achieve PubKey Authentication against a Windows Server 2019, however I could not get it to work.
I actually created a ed259919 key and put it into the correct folder `C:\Users\Administrator\.ssh\authorized_keys`.
However it just does not work.
What is even strange is the Windows Server Debug output (__ProgramData__?!):
```
PS C:\Users\Administrator\unzipped> sshd -d
debug1: sshd version OpenSSH_for_Windows_7.7, LibreSSL 2.6.5
debug1: private host key #0: ssh-rsa SHA256:PNoOxXBKB4SCOQougpsAZ9bUnku658ur9+wucTvsGSc
debug1: private host key #1: ecdsa-sha2-nistp256 SHA256:GKf1jbg/+ayrPx+MOCTeCSBgJze/9R7kVYdw4WcEMU8
debug1: private host key #2: ssh-ed25519 SHA256:q8Rqf9l/eUiPMx9YfVSd3mQKxm/2Detld2UgLmIPyLU
debug1: rexec_argv[0]='C:\\Windows\\System32\\OpenSSH\\sshd.exe'
debug1: rexec_argv[1]='-d'
debug1: Bind to port 22 on ::.
Server listening on :: port 22.
debug1: Bind to port 22 on 0.0.0.0.
Server listening on 0.0.0.0 port 22.
debug1: Server will not fork when running in debugging mode.
Connection from 192.168.179.152 port 61251 on 192.168.179.249 port 22
debug1: Client protocol version 2.0; client software version OpenSSH_7.8
debug1: match: OpenSSH_7.8 pat OpenSSH* compat 0x04000000
debug1: Local version string SSH-2.0-OpenSSH_for_Windows_7.7
debug1: sshd version OpenSSH_for_Windows_7.7, LibreSSL 2.6.5
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: ecdsa-sha2-nistp256 [preauth]
debug1: kex: client->server cipher: [email protected] MAC: <implicit> compression: none [preauth]
debug1: kex: server->client cipher: [email protected] MAC: <implicit> compression: none [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 Administrator service ssh-connection method none [preauth]
debug1: attempt 0 failures 0 [preauth]
debug1: user C:\\Users\\Administrator matched group list administrators at line 84
debug1: userauth-request for user Administrator service ssh-connection method publickey [preauth]
debug1: attempt 1 failures 0 [preauth]
debug1: userauth_pubkey: test pkalg ssh-ed25519 pkblob ED25519 SHA256:2nXx9fR4uOi8KRult6QjtZEvaTHIqH7i4cAv7qg3gSA [preauth]
debug1: trying public key file __PROGRAMDATA__/ssh/administrators_authorized_keys
debug1: Could not open authorized keys '__PROGRAMDATA__/ssh/administrators_authorized_keys': No such file or directory
Failed publickey for Administrator from 192.168.179.152 port 61251 ssh2: ED25519 SHA256:2nXx9fR4uOi8KRult6QjtZEvaTHIqH7i4cAv7qg3gSA
Connection closed by authenticating user Administrator 192.168.179.152 port 61251 [preauth]
debug1: do_cleanup [preauth]
debug1: monitor_read_log: child log fd closed
debug1: do_cleanup
debug1: Killing privsep child 1996
```
Client Verbose Output:
```
schmitch@tokio:~$ ssh -vvvv ci02
OpenSSH_7.8p1, LibreSSL 2.7.3
debug1: Reading configuration data /Users/schmitch/.ssh/config
debug1: /Users/schmitch/.ssh/config line 34: Applying options for ci02
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 48: Applying options for *
debug2: resolve_canonicalize: hostname 192.168.179.249 is address
debug2: ssh_connect_direct
debug1: Connecting to 192.168.179.249 [192.168.179.249] port 22.
debug1: Connection established.
debug1: identity file /Users/schmitch/.ssh/windows type 3
debug1: identity file /Users/schmitch/.ssh/windows-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_7.8
debug1: Remote protocol version 2.0, remote software version OpenSSH_for_Windows_7.7
debug1: match: OpenSSH_for_Windows_7.7 pat OpenSSH* compat 0x04000000
debug2: fd 3 setting O_NONBLOCK
debug1: Authenticating to 192.168.179.249:22 as 'Administrator'
debug3: hostkeys_foreach: reading file "/Users/schmitch/.ssh/known_hosts"
debug3: record_hostkey: found key type ECDSA in file /Users/schmitch/.ssh/known_hosts:155
debug3: load_hostkeys: loaded 1 keys from 192.168.179.249
debug3: order_hostkeyalgs: prefer hostkeyalgs: [email protected],[email protected],[email protected],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,[email protected],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: [email protected],[email protected],[email protected],ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,[email protected],[email protected],[email protected],[email protected],ssh-ed25519,rsa-sha2-512,rsa-sha2-256,ssh-rsa
debug2: ciphers ctos: [email protected],aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected]
debug2: ciphers stoc: [email protected],aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected]
debug2: MACs ctos: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: MACs stoc: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: compression ctos: none,[email protected],zlib
debug2: compression stoc: none,[email protected],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,[email protected],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: ssh-rsa,rsa-sha2-512,rsa-sha2-256,ecdsa-sha2-nistp256,ssh-ed25519
debug2: ciphers ctos: [email protected],aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected]
debug2: ciphers stoc: [email protected],aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected]
debug2: MACs ctos: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: MACs stoc: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: compression ctos: none
debug2: compression stoc: none
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: [email protected] MAC: <implicit> compression: none
debug1: kex: client->server cipher: [email protected] 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:GKf1jbg/+ayrPx+MOCTeCSBgJze/9R7kVYdw4WcEMU8
debug3: hostkeys_foreach: reading file "/Users/schmitch/.ssh/known_hosts"
debug3: record_hostkey: found key type ECDSA in file /Users/schmitch/.ssh/known_hosts:155
debug3: load_hostkeys: loaded 1 keys from 192.168.179.249
debug1: Host '192.168.179.249' is known and matches the ECDSA host key.
debug1: Found key in /Users/schmitch/.ssh/known_hosts:155
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
debug2: key: /Users/schmitch/.ssh/windows (0x7fc576c07060), explicit
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,keyboard-interactive
debug3: start over, passed a different list publickey,password,keyboard-interactive
debug3: preferred publickey
debug3: authmethod_lookup publickey
debug3: remaining preferred:
debug3: authmethod_is_enabled publickey
debug1: Next authentication method: publickey
debug1: Offering public key: ED25519 SHA256:2nXx9fR4uOi8KRult6QjtZEvaTHIqH7i4cAv7qg3gSA /Users/schmitch/.ssh/windows
debug3: send packet: type 50
debug2: we sent a publickey packet, wait for reply
debug3: receive packet: type 51
debug1: Authentications that can continue: publickey,password,keyboard-interactive
debug2: we did not send a packet, disable method
debug1: No more authentication methods to try.
[email protected]: Permission denied (publickey,password,keyboard-interactive).
```
My PubKey lies at C:\Users\Administrator\.ssh\authorized_keys
according to https://docs.microsoft.com/de-de/windows-server/administration/openssh/openssh_keymanagement
