SSH RSA keys authentication issue.

Question

1.     SshHostKeyAlgorithm keyAlgorithm = SshHostKeyAlgorithm.RSA;
       Int32 keySize = 2048;
       Rebex.Net.SshPrivateKey privateKey = Rebex.Net.SshPrivateKey.Generate(keyAlgorithm, keySize);
       privateKey.Save("C:\\ar160.ppk", UserPassword, SshPrivateKeyFormat.Putty);
       privateKey.SavePublicKey("C:\\ar160.pub", SshPublicKeyFormat.Ssh2Base64);
   

4.      using (var ssh = new Rebex.Net.Ssh())
        {
           ssh.LogWriter = new Rebex.FileLogWriter(@"C:\rebex.log", Rebex.LogLevel.Verbose);
           var privateKey = new Rebex.Net.SshPrivateKey("C:\\ar160.ppk", UserPassword);
           ssh.Settings.SshParameters.AuthenticationMethods = Rebex.Net.SshAuthenticationMethod.PublicKey;
           ssh.Connect(HostName, HostPort);
           ssh.Login(UserName, privateKey);
           ssh.Disconnect();
       }
   

Comments

Hello,

thanks for the logs. I can see you are on a hotfix build from May 2015. There were many enhancements and fixes since then. So before we dive deep into solving it, could you please just download the newest version of Rebex component (trial of Rebex SSH pack at http://www.rebex.net/ssh-pack/download.aspx), and try if the same issue persists with it.  

If you have an active SSH Pack license, you will find the downloading link after logging in at https://www.rebex.net/protected

So give the latest version a try too, and in case the same error persists, just send us a new log file. Thanks!

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Hello. I have installed the newest trial version of Rebex component. The problem is still persist. Example:

    2016-10-28 10:35:21.338 DEBUG Ssh(1)[9] SSH: Allowed authentication methods for 'user': publickey.
2016-10-28 10:35:21.339 DEBUG Ssh(1)[9] SSH: Trying public key authentication for 'user'.
2016-10-28 10:35:21.366 VERBOSE Ssh(1)[9] SSH: Sending packet SSH_MSG_USERAUTH_REQUEST (610 bytes).
 0000 |32-00-00-00-04-75-73-65 72-00-00-00-0E-73-73-68| 2....user....ssh
 0010 |2D-63-6F-6E-6E-65-63-74 69-6F-6E-00-00-00-09-70| -connection....p
 0020 |75-62-6C-69-63-6B-65-79 01-00-00-00-07-73-73-68| ublickey.....ssh
 0030 |2D-72-73-61-00-00-01-17 00-00-00-07-73-73-68-2D| -rsa........ssh-
 0040 |72-73-61-00-00-00-03-01 00-01-00-00-01-01-00-C3| rsa.............
 0050 |14-FF-01-17-52-53-B5-35 0C-FB-62-C8-74-5A-43-38| ....RS.5..b.tZC8
 0060 |3D-D8-F2-4B-7F-6C-DA-02 0B-0A-DB-93-AC-9B-02-82| =..K.l..........
 0070 |6E-FA-49-8C-04-7E-60-C8 3B-EB-89-67-29-7D-DC-04| n.I..~`.;..g)}..
 0080 |80-BC-8C-80-9A-D7-9F-83 1A-3F-08-B0-18-23-62-58| .........?...#bX
 0090 |C1-00-CA-00-2C-6E-8F-F0 DC-72-D8-26-32-CF-B4-32| ....,n...r.&2..2
 00A0 |5D-E7-70-8D-48-8E-D2-63 A1-F6-40-91-D0-F2-A5-C0| ].p.H..c..@.....
 00B0 |F5-D0-5E-4D-0E-B9-44-EB 1A-29-88-3E-5E-9F-D6-40| ..^M..D..).>^..@
 00C0 |D3-30-79-1B-2E-EC-F5-B7 21-E0-52-37-FD-BC-64-F8| .0y.....!.R7..d.
 00D0 |1D-6F-B7-C0-CD-49-6A-C9 A8-BF-32-E4-1C-A3-55-26| .o...Ij...2...U&
 00E0 |4C-76-DE-2A-70-BB-75-C3 D9-12-DD-55-58-D7-C2-82| Lv.*p.u....UX...
 00F0 |30-A5-94-79-D9-03-85-22 32-C2-4C-BA-A9-80-8C-91| 0..y..."2.L.....
 0100 |22-E2-51-16-E4-85-E3-8C 40-EF-12-E4-D2-B1-B6-41| ".Q.....@......A
 0110 |1B-07-B0-83-94-A2-7E-16 54-BF-AC-26-FD-22-85-7F| ......~.T..&."..
 0120 |5E-9D-10-CF-15-04-B0-25 B4-67-94-CD-CD-1B-9C-26| ^......%.g.....&
 0130 |CF-5B-28-DF-C3-19-75-F7 9D-85-10-7A-0A-CB-D5-B4| .[(...u....z....
 0140 |3E-C3-20-5B-C7-65-9D-8B BA-7B-6D-6C-4C-F7-CF-00| >. [.e...{mlL...
 0150 |00-01-0F-00-00-00-07-73 73-68-2D-72-73-61-00-00| .......ssh-rsa..
 0160 |01-00-2B-DC-E1-AE-2A-37 44-E2-7E-B2-E3-D7-8D-F9| ..+...*7D.~.....
 0170 |22-67-C5-ED-6A-06-06-8B 11-98-B3-A1-AC-0F-95-C3| "g..j...........
 0180 |EB-0D-88-F1-B0-D2-F0-B5 28-49-D3-37-C3-EC-68-F5| ........(I.7..h.
 0190 |AB-3B-30-59-E5-E0-F6-1D 75-E6-B9-77-FA-DC-D9-D5| .;0Y....u..w....
 01A0 |A9-2A-42-74-38-3F-96-0A 8E-9F-2B-7C-DE-FB-63-65| .*Bt8?....+|..ce
 01B0 |C3-D0-24-C0-20-1D-75-07 52-B9-D1-76-C9-8E-27-61| ..$. .u.R..v..'a
 01C0 |F5-5A-4C-B2-AC-8A-7F-66 0A-B2-CC-D1-E6-CF-B7-26| .ZL....f.......&
 01D0 |B2-BB-A3-A8-31-04-42-2E A7-C9-8B-3D-5F-12-27-E1| ....1.B....=_.'.
 01E0 |5A-B0-28-87-BB-C2-5F-2B 62-F1-9E-C9-22-9B-D3-48| Z.(..._+b..."..H
 01F0 |17-5C-41-81-33-4C-B2-9C BB-CA-9F-87-3D-B1-E6-D9| .\A.3L......=...
 0200 |66-DB-35-F8-3A-7A-62-F1 0B-90-6E-A9-61-11-19-E4| f.5.:zb...n.a...
 0210 |B5-64-3E-A7-DD-77-9B-F9 12-6B-6F-31-D4-FD-D5-05| .d>..w...ko1....
 0220 |2B-84-F3-C2-30-1D-84-B3 AE-19-C8-43-D3-60-02-B7| +...0......C.`..
 0230 |95-A3-47-50-8F-2E-9E-89 3A-89-D9-93-59-F7-39-9C| ..GP....:...Y.9.
 0240 |D2-8B-C2-C8-31-4B-A5-3D 9C-98-73-AD-CE-B7-84-B5| ....1K.=..s.....
 0250 |5A-88-8A-EE-07-E2-5B-82 E0-DA-0D-E0-28-2C-4F-BA| Z.....[.....(,O.
 0260 |B7-2B                                          | .+
2016-10-28 10:35:21.453 VERBOSE Ssh(1)[11] SSH: Received packet SSH_MSG_USERAUTH_BANNER (41 bytes).
 0000 |35-00-00-00-1F-0D-0A-45 72-72-6F-72-3A-20-41-75| 5......Error: Au
 0010 |74-68-65-6E-74-69-63-61 74-69-6F-6E-20-66-61-69| thentication fai
 0020 |6C-65-64-2E-00-00-00-00 00                     | led......
2016-10-28 10:35:21.454 INFO Ssh(1)[9] SSH: Received banner:
 
Error: Authentication failed.

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Can you please provide us with the PuTTY log as well? You can find it under the Session->Logging (select "SSH packets and raw data" and browse a path you want).

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I attached the zip archive with my keys and logs (include putty log). The putty log is too large.

http://wikisend.com/download/129416/ar160.zip

ar160.zip MD5 84F6F510BEC8129C074D533A98C78290

Answer 1

Comments

Thank you for the BETA build! The two step routine fix works great with my Huawei device. I am also tested it on my Cisco device and CentOS Linux system using the same key pair. Success.

I have purchased Rebex SSH Pack for .NET, but i need some time to clarify subscription status information.

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Thank you for letting us know. I have sent you instructions to your e-mail how to obtain full version of the BETA build.

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Thank you very much. The problem is solved.