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OpenSSL-SSH - Ruby Gem Modernization

Repo: https://github.com/aladac/openssl-ssh Detailed TODO: See TODO.md in repo

Summary

Ruby gem to parse OpenSSH format keys (ssh-rsa AAAA...) into OpenSSL::PKey objects.

Problem

Current code is broken on Ruby 2.4+ / OpenSSL 2.0+. Uses property assignment on immutable objects:

key.n = value  # ❌ Fails - OpenSSL::PKey is immutable

Fix

Use ASN.1 DER construction:

asn1 = OpenSSL::ASN1::Sequence.new([
  OpenSSL::ASN1::Integer.new(n),
  OpenSSL::ASN1::Integer.new(e)
])
key = OpenSSL::PKey::RSA.new(asn1.to_der)  # ✅ Works

Quick Tasks

  • Replace property assignment with ASN.1 DER approach
  • Add Ed25519 support (modern default)
  • Add ECDSA support
  • Update gemspec for Ruby 3.x
  • Add GitHub Actions CI