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[Bug] Public key authentication not working in version 3

See original GitHub issue

Hi!

I set up emberstack/sftp as an Azure container Instance. I tried to configure public key authentication, but as soon as I set the password to "" or null I can’t login anymore. Here is my configuration:

{
  "Global": {
    "Chroot": {
      "Directory": "%h",
      "StartPath": "sftp"
    },
    "Directories": [
      "sftp"
    ],
    "HostKeys": {
      "Ed25519": "[MY HOST ED25519 PRIVATE KEY]",
      "Rsa": "[MY HOST RSA PRIVATE KEY]"
    }
  },
  "Users": [
    {
      "Username": "myuser",
      "Password": "",
      "PublicKeys": [
        "[MY USER PUBLIC KEY]"
      ]
    }
  ]
}

Log output when using sshfs:

2020-06-19 14:41:05.388 [VRB] (ES.SFTP.Host.SSH.SSHService) sshd - PAM: Authentication failure for myuser from 10.240.255.56
2020-06-19 14:41:05.455 [VRB] (ES.SFTP.Host.SSH.SSHService) sshd - Connection closed by authenticating user myuser 10.240.255.56 port 46479 [preauth]
2020-06-19 14:41:18.675 [VRB] (ES.SFTP.Host.SSH.SSHService) sshd - PAM: Authentication failure for myuser from 10.240.255.56
2020-06-19 14:41:20.855 [VRB] (ES.SFTP.Host.SSH.SSHService) sshd - PAM: Authentication failure for myuser from 10.240.255.56
2020-06-19 14:41:20.895 [VRB] (ES.SFTP.Host.SSH.SSHService) sshd - Postponed keyboard-interactive for myuser from 10.240.255.56 port 59492 ssh2 [preauth]
2020-06-19 14:41:23.242 [VRB] (ES.SFTP.Host.SSH.SSHService) sshd - PAM: Authentication failure for myuser from 10.240.255.56
2020-06-19 14:41:23.589 [VRB] (ES.SFTP.Host.SSH.SSHService) sshd - Failed none for myuser from 10.240.255.56 port 59492 ssh2
2020-06-19 14:41:24.117 [VRB] (ES.SFTP.Host.SSH.SSHService) sshd - Failed password for myuser from 10.240.255.56 port 59492 ssh2
2020-06-19 14:41:24.126 [VRB] (ES.SFTP.Host.SSH.SSHService) sshd - maximum authentication attempts exceeded for myuser from 10.240.255.56 port 59492 ssh2 [preauth]
2020-06-19 14:41:24.126 [VRB] (ES.SFTP.Host.SSH.SSHService) sshd - Disconnecting authenticating user myuser 10.240.255.56 port 59492: Too many authentication failures [preauth]

When I use Filezilla, more or less the same thing happens.

EDIT: shortened log

Issue Analytics

State:
Created 3 years ago
Comments:13 (5 by maintainers)

Top GitHub Comments

1reaction

antoinedeschenescommented, Jun 25, 2020

@tibarix feature was added in 2.0.12

0reactions

winromuluscommented, Jun 26, 2020

@antoinedeschenes @josefschabasser - Fixed the issue by setting home directory permissions to 711. I do not want to set them to 755 unless there’s very good reasons to. I’ve tested this and it works with public keys now. Give it a spin if you can and if the problem persists, reopen the issue please.