On Thu 24 Oct 2019, Rich Shepard wrote:
> On Wed, 23 Oct 2019, wes wrote:
> 
> > Ok, try ssh -vi /root/.ssh/id_ed25519 localhost
> 
> Wes,
> 
> This is very interesting:
> 
> # ssh -vi id_ed25519 localhost 

Note you're not doing what Wes suggested. You're missing the path to the
identity file, which is OK if your current directory is /root/.ssh .

> OpenSSH_7.4p1, OpenSSL 1.0.2t  10 Sep 2019
> debug1: Reading configuration data /root/.ssh/config
> debug1: Reading configuration data /etc/ssh/ssh_config
> debug1: Connecting to localhost [127.0.0.1] port <redacted>.
> debug1: Connection established.
> debug1: permanently_set_uid: 0/0
> debug1: identity file id_ed25519 type 4
> debug1: key_load_public: No such file or directory
> debug1: identity file id_ed25519-cert type -1
> debug1: identity file /root/.ssh/id_ed25519 type 4
> debug1: key_load_public: No such file or directory
> debug1: identity file /root/.ssh/id_ed25519-cert type -1
> debug1: Enabling compatibility mode for protocol 2.0
> debug1: Local version string SSH-2.0-OpenSSH_7.4
> debug1: Remote protocol version 2.0, remote software version OpenSSH_7.4
> debug1: match: OpenSSH_7.4 pat OpenSSH* compat 0x04000000
> debug1: Authenticating to localhost:14982 as 'root'
> debug1: SSH2_MSG_KEXINIT sent
> debug1: SSH2_MSG_KEXINIT received
> debug1: kex: algorithm: [email protected]
> debug1: kex: host key algorithm: ssh-ed25519
> debug1: kex: server->client cipher: [email protected] MAC: 
> <implicit> compression: none
> debug1: kex: client->server cipher: [email protected] MAC: 
> <implicit> compression: none
> debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
> debug1: Server host key: ssh-ed25519 
> SHA256:/RInRdtcIMbpPu3LZmpg5wfAWi9ozQwgKLPnTQEDcxg
> debug1: Host '[localhost]:<redacted>' is known and matches the ED25519 host 
> key.
> debug1: Found key in /root/.ssh/known_hosts:3
> debug1: rekey after 134217728 blocks
> debug1: SSH2_MSG_NEWKEYS sent
> debug1: expecting SSH2_MSG_NEWKEYS
> debug1: SSH2_MSG_NEWKEYS received
> debug1: rekey after 134217728 blocks
> debug1: SSH2_MSG_EXT_INFO received
> debug1: kex_input_ext_info: 
> server-sig-algs=<ssh-ed25519,ssh-rsa,ssh-dss,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521>
> debug1: SSH2_MSG_SERVICE_ACCEPT received
> debug1: Authentications that can continue: publickey
> debug1: Next authentication method: publickey
> debug1: Offering ED25519 public key: id_ed25519
> debug1: Authentications that can continue: publickey
> debug1: Offering ED25519 public key: /root/.ssh/id_ed25519
> debug1: Authentications that can continue: publickey
> debug1: No more authentication methods to try.
> Permission denied (publickey).
> 
> I wonder why it cannot find id_ed5519.pub when it tries to key_load_public,
> but then seems to find and accept it.

First with, and the without the path?

Also check the sshd logfile (may be in /var/log/secure.log or
daemon.log, for example), that may indicate if permissions etc. are
wrong.

I note you didn't check (or at least didn't show) the permissions of the
directories /root and /root/.ssh


Paul
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