RSA Keys Agent Forwarding returns no mutual signature supported

[stevenGravy]

Expected behavior:

RSA keys with rsa-sha2-256 and rsa-sha2-512 signatures will agent forward and allow access to servers with those RSA keys.

Current behavior:

Teleport includes the RSA keys but when attempting to use those keys an error is returned. Using those keys with a OpenSSH servers does work with agent forwarding.

Error:

sign_and_send_pubkey: no mutual signature supported

Bug details:

• Teleport version 10.1.4
• Recreation steps

Run ssh-keygen to create an RSA key.

Use ssh-add -K rsa to add to ssh agent.

Add the rsa.pub file to a non Teleport node in authorized keys.

Make sure Agent Forwarding is on for the Teleport roel

  options:
    forward_agent: true

[stevenGravy]

Working now