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[quote="rkylegreen"]I included about 50 lines of the log below.

Things seemed to be going well with the connection until these lines in the log:
[code]@sessionlog@
. 2024-09-07 20:01:12.401 Reading key file "C:\Users\bob\.ssh\FirstPrivate.ppk"
. 2024-09-07 20:01:12.401 Unable to use this key file (SSH-1 private key)
! 2024-09-07 20:01:12.401 Unable to use key file "C:\Users\bob\.ssh\FirstPrivate.ppk" (SSH-1 private key)
[/code]
The public key is in [m]c:\ProgramData\ssh\administrators_authorized_keys[/m], on a single line, and appears to be in good shape. The user logging in is in the Administrators Group. [m]sshd_config[/m] specifies the above named file.

There was a warning about SSH-1, but I used PuTTYgen to create them, so I thought they would be up to par.

Is that the reason for the failure, or should I be looking at something else. Thanks!
[code]@sessionlog@
. 2024-09-07 20:01:11.977 Using SSH protocol version 2
. 2024-09-07 20:01:11.977 Have a known host key of type ssh-ed25519
. 2024-09-07 20:01:12.065 Detected network event
. 2024-09-07 20:01:12.065 Enumerating network events for socket 2044
. 2024-09-07 20:01:12.065 Enumerated 1 network events making 1 cumulative events for socket 2044
. 2024-09-07 20:01:12.065 Handling network read event on socket 2044 with error 0
. 2024-09-07 20:01:12.065 Waiting for the server to continue with the initialization
. 2024-09-07 20:01:12.065 Looking for incoming data
. 2024-09-07 20:01:12.065 Looking for network events
. 2024-09-07 20:01:12.066 Doing ECDH key exchange with curve Curve25519, using hash SHA-256
. 2024-09-07 20:01:12.217 Detected network event
. 2024-09-07 20:01:12.217 Enumerating network events for socket 2044
. 2024-09-07 20:01:12.217 Enumerated 1 network events making 1 cumulative events for socket 2044
. 2024-09-07 20:01:12.217 Handling network read event on socket 2044 with error 0
. 2024-09-07 20:01:12.217 Waiting for the server to continue with the initialization
. 2024-09-07 20:01:12.217 Looking for incoming data
. 2024-09-07 20:01:12.217 Looking for network events
. 2024-09-07 20:01:12.256 Server also has ecdsa-sha2-nistp256/rsa-sha2-512/rsa-sha2-256/ssh-rsa host keys, but we don't know any of them
. 2024-09-07 20:01:12.256 Host key fingerprint is:
. 2024-09-07 20:01:12.256 ssh-ed25519 255 SHA256:1jQcp2N9JZLQGQ/2+dR8Vt/vhpO6YAbnAFYoGpwREu0
. 2024-09-07 20:01:12.256 Verifying host key xxx
. 2024-09-07 20:01:12.314 Host key matches cached key
. 2024-09-07 20:01:12.315 Initialised AES-256 SDCTR (AES-NI accelerated) [aes256-ctr] outbound encryption
. 2024-09-07 20:01:12.315 Initialised HMAC-SHA-256 outbound MAC algorithm
. 2024-09-07 20:01:12.315 Initialised AES-256 SDCTR (AES-NI accelerated) [aes256-ctr] inbound encryption
. 2024-09-07 20:01:12.315 Initialised HMAC-SHA-256 inbound MAC algorithm
. 2024-09-07 20:01:12.401 Detected network event
. 2024-09-07 20:01:12.401 Enumerating network events for socket 2044
. 2024-09-07 20:01:12.401 Enumerated 1 network events making 1 cumulative events for socket 2044
. 2024-09-07 20:01:12.401 Handling network read event on socket 2044 with error 0
. 2024-09-07 20:01:12.401 Waiting for the server to continue with the initialization
. 2024-09-07 20:01:12.401 Looking for incoming data
. 2024-09-07 20:01:12.401 Looking for network events
. 2024-09-07 20:01:12.401 Reading key file "C:\Users\bob\.ssh\FirstPrivate.ppk"
. 2024-09-07 20:01:12.401 Unable to use this key file (SSH-1 private key)
! 2024-09-07 20:01:12.401 Unable to use key file "C:\Users\bob\.ssh\FirstPrivate.ppk" (SSH-1 private key)
! 2024-09-07 20:01:12.442 Using username "bob".
. 2024-09-07 20:01:12.563 Detected network event
. 2024-09-07 20:01:12.563 Enumerating network events for socket 2044
. 2024-09-07 20:01:12.563 Enumerated 1 network events making 1 cumulative events for socket 2044
. 2024-09-07 20:01:12.563 Handling network read event on socket 2044 with error 0
. 2024-09-07 20:01:12.563 Waiting for the server to continue with the initialization
. 2024-09-07 20:01:12.563 Looking for incoming data
. 2024-09-07 20:01:12.563 Looking for network events
. 2024-09-07 20:01:12.564 Server offered these authentication methods: publickey,keyboard-interactive
. 2024-09-07 20:01:12.564 Attempting keyboard-interactive authentication
. 2024-09-07 20:01:12.656 Detected network event
. 2024-09-07 20:01:12.656 Enumerating network events for socket 2044
. 2024-09-07 20:01:12.656 Enumerated 1 network events making 1 cumulative events for socket 2044
. 2024-09-07 20:01:12.656 Handling network read event on socket 2044 with error 0
. 2024-09-07 20:01:12.656 Waiting for the server to continue with the initialization
. 2024-09-07 20:01:12.656 Looking for incoming data
. 2024-09-07 20:01:12.656 Looking for network events
. 2024-09-07 20:01:12.656 Server refused keyboard-interactive authentication
. 2024-09-07 20:01:12.656 Server offered these authentication methods: publickey,keyboard-interactive
. 2024-09-07 20:01:12.657 No supported authentication methods available (server sent: publickey,keyboard-interactive)
[/code][/quote]

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Topic review

martin

Re: Log: unable to use private key

2024-09-12

It does not matter how you run PuTTYgen, as long as you use the latest version.

rkylegreen

Re: Log: unable to use private key

2024-09-09 20:03

Martin, thanks for the reply.

In PuTTYgen, I think I accepted the defaults, assuming that would be best. I will regenerate the keys, and pay more attention this time.

Last time I ran PuTTYgen separately. Is it suggested that I do it from within WinSCP instead?

Thanks,
Kyle

martin

Re: Log: unable to use private key

2024-09-09

Well, then the key is probably SSH-1. Haven't you selected "SSH-1 (RSA)" key type in PuTTYgen, when generating the key? Do not do that. No modern SSH client nor server support SSH-1 anymore.

rkylegreen

Log: unable to use private key

2024-09-08 04:32

I included about 50 lines of the log below.

Things seemed to be going well with the connection until these lines in the log:

. 2024-09-07 20:01:12.401 Reading key file "C:\Users\bob\.ssh\FirstPrivate.ppk"
. 2024-09-07 20:01:12.401 Unable to use this key file (SSH-1 private key)
! 2024-09-07 20:01:12.401 Unable to use key file "C:\Users\bob\.ssh\FirstPrivate.ppk" (SSH-1 private key)

The public key is in c:\ProgramData\ssh\administrators_authorized_keys, on a single line, and appears to be in good shape. The user logging in is in the Administrators Group. sshd_config specifies the above named file.

There was a warning about SSH-1, but I used PuTTYgen to create them, so I thought they would be up to par.

Is that the reason for the failure, or should I be looking at something else. Thanks!

. 2024-09-07 20:01:11.977 Using SSH protocol version 2
. 2024-09-07 20:01:11.977 Have a known host key of type ssh-ed25519
. 2024-09-07 20:01:12.065 Detected network event
. 2024-09-07 20:01:12.065 Enumerating network events for socket 2044
. 2024-09-07 20:01:12.065 Enumerated 1 network events making 1 cumulative events for socket 2044
. 2024-09-07 20:01:12.065 Handling network read event on socket 2044 with error 0
. 2024-09-07 20:01:12.065 Waiting for the server to continue with the initialization
. 2024-09-07 20:01:12.065 Looking for incoming data
. 2024-09-07 20:01:12.065 Looking for network events
. 2024-09-07 20:01:12.066 Doing ECDH key exchange with curve Curve25519, using hash SHA-256
. 2024-09-07 20:01:12.217 Detected network event
. 2024-09-07 20:01:12.217 Enumerating network events for socket 2044
. 2024-09-07 20:01:12.217 Enumerated 1 network events making 1 cumulative events for socket 2044
. 2024-09-07 20:01:12.217 Handling network read event on socket 2044 with error 0
. 2024-09-07 20:01:12.217 Waiting for the server to continue with the initialization
. 2024-09-07 20:01:12.217 Looking for incoming data
. 2024-09-07 20:01:12.217 Looking for network events
. 2024-09-07 20:01:12.256 Server also has ecdsa-sha2-nistp256/rsa-sha2-512/rsa-sha2-256/ssh-rsa host keys, but we don't know any of them
. 2024-09-07 20:01:12.256 Host key fingerprint is:
. 2024-09-07 20:01:12.256 ssh-ed25519 255 SHA256:1jQcp2N9JZLQGQ/2+dR8Vt/vhpO6YAbnAFYoGpwREu0
. 2024-09-07 20:01:12.256 Verifying host key xxx
. 2024-09-07 20:01:12.314 Host key matches cached key
. 2024-09-07 20:01:12.315 Initialised AES-256 SDCTR (AES-NI accelerated) [aes256-ctr] outbound encryption
. 2024-09-07 20:01:12.315 Initialised HMAC-SHA-256 outbound MAC algorithm
. 2024-09-07 20:01:12.315 Initialised AES-256 SDCTR (AES-NI accelerated) [aes256-ctr] inbound encryption
. 2024-09-07 20:01:12.315 Initialised HMAC-SHA-256 inbound MAC algorithm
. 2024-09-07 20:01:12.401 Detected network event
. 2024-09-07 20:01:12.401 Enumerating network events for socket 2044
. 2024-09-07 20:01:12.401 Enumerated 1 network events making 1 cumulative events for socket 2044
. 2024-09-07 20:01:12.401 Handling network read event on socket 2044 with error 0
. 2024-09-07 20:01:12.401 Waiting for the server to continue with the initialization
. 2024-09-07 20:01:12.401 Looking for incoming data
. 2024-09-07 20:01:12.401 Looking for network events
. 2024-09-07 20:01:12.401 Reading key file "C:\Users\bob\.ssh\FirstPrivate.ppk"
. 2024-09-07 20:01:12.401 Unable to use this key file (SSH-1 private key)
! 2024-09-07 20:01:12.401 Unable to use key file "C:\Users\bob\.ssh\FirstPrivate.ppk" (SSH-1 private key)
! 2024-09-07 20:01:12.442 Using username "bob".
. 2024-09-07 20:01:12.563 Detected network event
. 2024-09-07 20:01:12.563 Enumerating network events for socket 2044
. 2024-09-07 20:01:12.563 Enumerated 1 network events making 1 cumulative events for socket 2044
. 2024-09-07 20:01:12.563 Handling network read event on socket 2044 with error 0
. 2024-09-07 20:01:12.563 Waiting for the server to continue with the initialization
. 2024-09-07 20:01:12.563 Looking for incoming data
. 2024-09-07 20:01:12.563 Looking for network events
. 2024-09-07 20:01:12.564 Server offered these authentication methods: publickey,keyboard-interactive
. 2024-09-07 20:01:12.564 Attempting keyboard-interactive authentication
. 2024-09-07 20:01:12.656 Detected network event
. 2024-09-07 20:01:12.656 Enumerating network events for socket 2044
. 2024-09-07 20:01:12.656 Enumerated 1 network events making 1 cumulative events for socket 2044
. 2024-09-07 20:01:12.656 Handling network read event on socket 2044 with error 0
. 2024-09-07 20:01:12.656 Waiting for the server to continue with the initialization
. 2024-09-07 20:01:12.656 Looking for incoming data
. 2024-09-07 20:01:12.656 Looking for network events
. 2024-09-07 20:01:12.656 Server refused keyboard-interactive authentication
. 2024-09-07 20:01:12.656 Server offered these authentication methods: publickey,keyboard-interactive
. 2024-09-07 20:01:12.657 No supported authentication methods available (server sent: publickey,keyboard-interactive)

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Re: Log: unable to use private key

Re: Log: unable to use private key

Re: Log: unable to use private key

Log: unable to use private key

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