How to Fix: GnuPG 2.2 refuses secret key import: "error sending to agent: operation cancelled"

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GnuPG error sending to agent: operation cancelled when importing secret keys.

The Problem

GnuPG 2.2 refuses secret key import with the error message 'error sending to agent: operation cancelled' when attempting to import PGP identity including secret keys from another computer. This issue affects users who rely on GnuPG for secure key management and encryption.This frustrating error can be caused by various factors, including misconfigured gpg-agent settings or issues with the pinentry program. In this troubleshooting guide, we will walk you through the steps to resolve this issue.
💡 Why You Are Getting This Error

                The primary reason for this error is a mismatch between the GnuPG version and the gpg-agent version on both systems. This can cause the agent to cancel operations, preventing secret key imports.Another possible cause is an incorrect pinentry-program configuration in the gpg-agent.conf file. If the pinentry program is not set correctly, it may interfere with the agent's ability to send data, resulting in the 'error sending to agent: operation cancelled' error.

            🚀 How to Resolve This Issue

                Configuring gpg-agent and pinentry-program

                    Step 1: Step 1: Check the version of gpg-agent on both systems and ensure they match. You can do this by running `gpg --version` on both computers. If the versions are different, update one or both systems to the same version.Step 2: Step 2: Verify that the pinentry-program is correctly configured in the gpg-agent.conf file. The correct configuration should include the path to the pinentry program, such as `/usr/bin/pinentry --quiet`. You can find more information about this configuration option in the GnuPG documentation.



                Using SSH agent forwarding

                    Step 1: Step 1: Enable SSH agent forwarding on the computer hosting the secret key. This will allow you to use the same SSH connection to forward the agent socket to the remote system.Step 2: Step 2: Run `ssh -A othercomputer` to enable agent forwarding and connect to the remote system. You should then be able to import your secret keys using `gpg2 --import`.


            💡 Conclusion
            To resolve the 'error sending to agent: operation cancelled' error when importing secret keys with GnuPG 2.2, try configuring gpg-agent and pinentry-program or use SSH agent forwarding. By following these steps, you should be able to successfully import your PGP identity including secret keys.

Full step-by-step guide with screenshots: Read the complete fix here

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