https://github.com/philr/putty-key
Ruby PuTTY private key (.ppk) library. Supports reading and writing with a refinement to OpenSSL::PKey to allow key conversion.
https://github.com/philr/putty-key
ppk putty putty-private-key puttygen ruby ssh
Last synced: 6 months ago
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Ruby PuTTY private key (.ppk) library. Supports reading and writing with a refinement to OpenSSL::PKey to allow key conversion.
- Host: GitHub
- URL: https://github.com/philr/putty-key
- Owner: philr
- License: mit
- Created: 2016-03-28T19:26:03.000Z (about 9 years ago)
- Default Branch: master
- Last Pushed: 2024-10-16T11:19:58.000Z (8 months ago)
- Last Synced: 2024-11-18T09:26:53.894Z (7 months ago)
- Topics: ppk, putty, putty-private-key, puttygen, ruby, ssh
- Language: Ruby
- Homepage:
- Size: 113 KB
- Stars: 7
- Watchers: 4
- Forks: 1
- Open Issues: 1
-
Metadata Files:
- Readme: README.md
- Changelog: CHANGES.md
- License: LICENSE
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README
# PuTTY::Key #
[](https://rubygems.org/gems/putty-key) [](https://github.com/philr/putty-key/actions?query=workflow%3ATests+branch%3Amaster+event%3Apush) [](https://coveralls.io/github/philr/putty-key?branch=master)
PuTTY::Key is a Ruby implementation of the PuTTY private key (ppk) format
(versions 2 and 3), handling reading and writing .ppk files. It includes a
refinement to Ruby's OpenSSL library to add support for converting DSA, EC and
RSA private keys to and from PuTTY private key files. This allows OpenSSH ecdsa,
ssh-dss and ssh-rsa private keys to be converted to and from PuTTY's private key
format.
## Installation ##
To install the PuTTY::Key gem, run the following command:
```bash
gem install putty-key
```
To add PuTTY::Key as a Bundler dependency, add the following line to your
`Gemfile`:
```ruby
gem 'putty-key'
```
## Compatibility ##
PuTTY::Key is compatible with Ruby MRI 2.1.0+ and JRuby 9.1.0.0+.
## Formats ##
Format 2 and 3 .ppk files are supported. Format 1 (not supported) was only used
briefly early on in the development of the .ppk format and was never included in
a PuTTY release. Format 2 is supported by PuTTY version 0.52 onwards. Format 3
is supported by PuTTY version 0.75 onwards. By default, `PuTTY::Key::PPK` saves
files using format 2. Format 3 can be selected with the `format` parameter.
[libargon2](https://github.com/P-H-C/phc-winner-argon2) is required to load and
save encrypted format 3 files. Binaries are typically available with your OS
distribution. For Windows, binaries are available from the
[argon2-windows](https://github.com/philr/argon2-windows/releases) repository.
Use either Argon2OptDll.dll for CPUs supporting AVX or Argon2RefDll.dll
otherwise.
## Usage ##
To use PuTTY::Key, it must first be loaded with:
```ruby
require 'putty/key'
```
The included [refinement](https://ruby-doc.org/core/doc/syntax/refinements_rdoc.html)
to Ruby's OpenSSL library can then either be activated in the lexical scope
(file, class or module) where it will be used with:
```ruby
using PuTTY::Key
```
or installed globally by calling:
```ruby
PuTTY::Key.global_install
```
The following sections give examples of how PuTTY::Key can be used.
### Converting a .pem formatted key file to an unencrypted .ppk file ###
```ruby
require 'openssl'
require 'putty/key'
using PuTTY::Key # or PuTTY::Key.global_install
pem = File.read('key.pem', mode: 'rb')
pkey = OpenSSL::PKey.read(pem)
ppk = pkey.to_ppk
ppk.comment = 'Optional comment'
ppk.save('key.ppk')
```
Use `ppk.save('key.ppk', format: 3)` to save a format 3 file instead of
format 2.
### Generating a new RSA key and saving it as an encrypted .ppk file ###
```ruby
require 'openssl'
require 'putty/key'
using PuTTY::Key # or PuTTY::Key.global_install
rsa = OpenSSL::PKey::RSA.generate(2048)
ppk = rsa.to_ppk
ppk.comment = 'RSA 2048'
ppk.save('rsa.ppk', 'Passphrase for encryption')
```
Use `ppk.save('rsa.ppk', 'Passphrase for encryption', format: 3)` to save a
format 3 file instead of format 2.
### Converting an unencrypted .ppk file to .pem format ###
```ruby
require 'openssl'
require 'putty/key'
using PuTTY::Key # or PuTTY::Key.global_install
ppk = PuTTY::Key::PPK.new('key.ppk')
pkey = OpenSSL::PKey.from_ppk(ppk)
pem = pkey.to_pem
File.write('key.pem', pem, mode: 'wb')
```
### Decrypting a .ppk file and re-saving it without encryption ###
```ruby
require 'putty/key'
ppk = PuTTY::Key::PPK.new('rsa.ppk', 'Passphrase for encryption')
ppk.save('rsa-plain.ppk')
```
Use `ppk.save('rsa-plain.ppk', format: 3)` to save a format 3 file instead of
format 2.
## API Documentation ##
API documentation for PuTTY::Key is available on
[RubyDoc.info](https://www.rubydoc.info/gems/putty-key).
## License ##
PuTTY::Key is distributed under the terms of the MIT license. A copy of this
license can be found in the included LICENSE file.
## GitHub Project ##
Source code, release information and the issue tracker can be found on the
[PuTTY::Key GitHub project page](https://github.com/philr/putty-key).