Resolving "Error: Failed to install provider" with Rancher2 Provider (openpgp: unsupported feature: public key algorithm 22)

Rancher2 Terraform Provider

Users attempting to initialize or apply Terraform configurations using the rancher2 provider (version ~> 6.0.0) may encounter the following error:

Error: Failed to install provider

Error while installing rancher/rancher2 v6.1.4: error decoding signing key: 
openpgp: unsupported feature: public key algorithm 22

The underlying issues have been resolved. The Rancher team has addressed the key management and signing algorithm problems.

For users who encountered this issue:

• Upgrade Terraform: Ensure you are using Terraform version v1.5.7 or later. This version includes support for the necessary signing algorithm.

  • To check your Terraform version, run: $ terraform --version
  • To upgrade Terraform, follow the official HashiCorp documentation.

• Re-initialize Terraform: After upgrading Terraform, run terraform init to initialise.

This issue stems from two related incidents affecting the signing and validation of the rancher2 provider:

1. An initial issue arose due to a key management issue within HashiCorp's systems, combined with a Terraform update that invalidated the existing Rancher signing key. This prevented the provider release from being successfully signed.
2. Subsequently, the Rancher signing key was cross-signed using an algorithm (specifically, algorithm  ed25519) that older versions of Terraform do not support. This incompatibility caused validation failures when older Terraform versions attempted to verify the provider's signature.