Changes

Version 1.1.1 - 23-Oct-2022

Add support for Ruby 3.2.
Add support for OpenSSL 3 (requires either Ruby 3.1+, or version 3.0.0+ of the openssl gem).

Add support for format 3 .ppk files introduced in PuTTY version 0.75. PuTTY::Key::PPK#save defaults to saving format 2 files. libargon2 is required to load and save encrypted format 3 files.
Write files using LF line endings (Unix) instead of CRLF (Windows) to match PuTTYgen version 0.75 (versions up to 0.74 used CRLF, but are compatible with CRLF and LF).
Support reading files with CR line endings (Classic Mac OS).
Support reading from and writing to IO-like streams.
Allow loading and saving files with empty private or public keys.
Fix adding unnecessary padding to the private key on saving when it is an exact multiple of the block size.

Fix errors converting DSA and RSA PPK keys to OpenSSL in OpenSSL::PKey.from_ppk(ppk) with Ruby MRI 2.4 and later.
Fix errors converting EC PPK keys to OpenSSL in OpenSSL::PKey.from_ppk(ppk) with JRuby 9.2.
Fix errors converting EC keys from OpenSSL to PPK in OpenSSL::PKey::EC.to_ppk with JRuby 9.2.
Enable frozen string literals.
Load dependencies using require_relative instead of require.
Remove support for Rubinius.