(maint) add ed25519 support

rubygems has compiled versions of bcrypt_pbkdf 1.1.1 for windows
and now compile correctly all platforms with a supported ruby dev
environment

addresses #1987

bolt.gemspec

@@ -45,8 +45,10 @@ Gem::Specification.new do |spec|
 
   spec.add_dependency "addressable", '~> 2.5'
   spec.add_dependency "aws-sdk-ec2", '~> 1'
+  spec.add_dependency "bcrypt_pbkdf", ">= 1.1.1", "< 2.0"
   spec.add_dependency "CFPropertyList", ">= 2.2"
   spec.add_dependency "concurrent-ruby", "~> 1.0"
+  spec.add_dependency "ed25519", ">= 1.3", "< 2.0"
   spec.add_dependency "ffi", ">= 1.9.25", "< 2.0.0"
   spec.add_dependency "hiera-eyaml", "~> 3"
   spec.add_dependency "jwt", "~> 2.2"

documentation/bolt_known_issues.md

@@ -73,37 +73,6 @@ command line with the `--password` option.
 - [#1986 - Commands fail if in a remote session to
   Windows](https://github.com/puppetlabs/bolt/issues/1986)
 
-## Unable to authenticate with ed25519 keys over SSH transport on Windows
-
-By default, Bolt uses the `net-ssh` Ruby libary to connect to targets over SSH.
-The `net-ssh` library requires the `ed25519` and `bcrypt_pbkdf` gems as
-dependencies, which are not supported in Bolt's packaging process due to issues
-with compiling native extensions.
-
-Attempting to authenticate with ed25519 keys over SSH on Windows will result
-in an error message similar to this:
-
-```
-unsupported key type `ssh-ed25519'
- net-ssh requires the following gems for ed25519 support:
-  * ed25519 (>= 1.2, < 2.0)
-  * bcrypt_pbkdf (>= 1.0, < 2.0)
-```
-
-A workaround is to use native SSH when you need to authenticate with ed25519
-keys. When native SSH is enabled, Bolt will use a specified SSH client to
-connect to targets instead of the `net-ssh` Ruby library. To learn more about
-native SSH, see [native SSH
-transport](experimental_features.md#native-ssh-transport). 
-
-🧪 Native SSH is
-experimental and might change in future minor (y) releases.
-
-📖 **Related issues**
-
-- [#1987 - Unable to authenticate with ed25519 keys over SSH transport
-  on Windows](https://github.com/puppetlabs/bolt/issues/1987)
-
 ## 🧪 Limited Kerberos support over WinRM
 
 🧪 Authenticating with Kerberos over WinRM is considered experimental and is

spec/Dockerfile

@@ -28,7 +28,8 @@ RUN adduser bolt sudo
 
 RUN mkdir -p /home/bolt/.ssh
 COPY fixtures/keys/id_rsa.pub /home/bolt/.ssh/id_rsa.pub
-COPY fixtures/keys/id_rsa.pub /home/bolt/.ssh/authorized_keys
+COPY fixtures/keys/id_ed25519.pub /home/bolt/.ssh/id_ed25519.pub
+RUN cat /home/bolt/.ssh/*.pub > /home/bolt/.ssh/authorized_keys
 RUN chmod 700 /home/bolt/.ssh
 RUN chmod 600 /home/bolt/.ssh/authorized_keys
 RUN chown -R bolt:sudo /home/bolt
@@ -41,7 +42,8 @@ RUN echo test | chsh -s /bin/bash test
 
 RUN mkdir -p /home/test/.ssh
 COPY fixtures/keys/id_rsa.pub /home/test/.ssh/id_rsa.pub
-COPY fixtures/keys/id_rsa.pub /home/test/.ssh/authorized_keys
+COPY fixtures/keys/id_ed25519.pub /home/test/.ssh/id_ed25519.pub
+RUN cat /home/test/.ssh/*.pub > /home/test/.ssh/authorized_keys
 RUN chmod 700 /home/test/.ssh
 RUN chmod 600 /home/test/.ssh/authorized_keys
 RUN chown -R test:sudo /home/test

spec/bolt_server/app_integration_spec.rb

@@ -44,20 +44,31 @@ def app
         expect(result['value']['_output'].chomp).to match(/\w+ got passed the message: Hello!/)
       end
 
-      it 'runs an echo task using a private key' do
-        private_key = ENV['BOLT_SSH_KEY'] || Dir["spec/fixtures/keys/id_rsa"][0]
-        private_key_content = File.read(private_key)
-        target = conn_target('ssh', options: { 'private-key' => { 'key-data' => private_key_content } })
-        body = build_task_request('sample::echo',
-                                  target,
-                                  message: "Hello!")
+      %w[env rsa ed25519].each do |key_type|
+        next if key_type == 'env' && ENV['BOLT_SSH_KEY'].nil?
+
+        context "runs an echo task using an #{key_type} private key" do
+          let(:private_key) do
+            key_type == 'env' ? ENV['BOLT_SSH_KEY'] : Dir["spec/fixtures/keys/id_#{key_type}"][0]
+          end
+
+          it do
+            private_key_content = File.read(private_key)
+            target = conn_target('ssh', options: { 'private-key' => { 'key-data' => private_key_content } })
+            body = build_task_request('sample::echo',
+                                      target,
+                                      message: "Hello!")
+
+            post path, JSON.generate(body), 'CONTENT_TYPE' => 'text/json'
+            expect(last_response).to be_ok
+            expect(last_response.status).to eq(200)
+            result = JSON.parse(last_response.body)
+            expect(result).to include('status' => 'success')
+            expect(result['value']['_output'].chomp).to match(/\w+ got passed the message: Hello!/)
+          end
+        end
 
-        post path, JSON.generate(body), 'CONTENT_TYPE' => 'text/json'
-        expect(last_response).to be_ok
-        expect(last_response.status).to eq(200)
-        result = JSON.parse(last_response.body)
-        expect(result).to include('status' => 'success')
-        expect(result['value']['_output'].chomp).to match(/\w+ got passed the message: Hello!/)
+        break if key_type == 'env'
       end
 
       it 'runs a shareable task' do

spec/fixtures/keys/id_ed25519

@@ -0,0 +1,8 @@
+-----BEGIN OPENSSH PRIVATE KEY-----
+b3BlbnNzaC1rZXktdjEAAAAABG5vbmUAAAAEbm9uZQAAAAAAAAABAAAAMwAAAAtzc2gtZW
+QyNTUxOQAAACDuFK/VaW7prqpNVY0H+bUTXsbDSeYg5XKlo0AitRXSmAAAALjUlsWQ1JbF
+kAAAAAtzc2gtZWQyNTUxOQAAACDuFK/VaW7prqpNVY0H+bUTXsbDSeYg5XKlo0AitRXSmA
+AAAECU+JslSRRf+EDh1yWFP6Hue8DrT0M8CGLp1UDKycZnfu4Ur9Vpbumuqk1VjQf5tRNe
+xsNJ5iDlcqWjQCK1FdKYAAAAMWplZmZyZXkuY2xhcmtAamVmZnJleWNsYXJrcy1WaXJ0dW
+FsLU1hY2hpbmUubG9jYWwBAgME
+-----END OPENSSH PRIVATE KEY-----

spec/fixtures/keys/id_ed25519.pub

@@ -0,0 +1 @@
+ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIO4Ur9Vpbumuqk1VjQf5tRNexsNJ5iDlcqWjQCK1FdKY [email protected]

spec/integration/transport/ssh_spec.rb

@@ -32,6 +32,7 @@
   let(:bash_user)         { 'test' }
   let(:bash_password)     { 'test' }
   let(:key)               { conn_info('ssh')[:key] }
+  let(:ed25519_key)       { File.expand_path(File.join(__dir__, '..', '..', 'fixtures/keys/id_ed25519')) }
   let(:command)           { "pwd" }
 
   let(:no_host_key_check) { { 'host-key-check' => false, user: user, password: password } }
@@ -208,6 +209,14 @@ def make_target(host_: hostname, port_: port)
         ).to eq(true)
       end
     end
+
+    context "with ed25519 private key" do
+      let(:transport_config) { super().merge({ 'private-key' => ed25519_key }) }
+
+      it "executes a command on a host" do
+        expect(ssh.run_command(target, command).value['stdout']).to eq("/home/#{user}\n")
+      end
+    end
   end
 
   context "when executing with private key data" do

spec/unit/executor_spec.rb

@@ -571,7 +571,7 @@ def mock_node_results
       expect(ssh)
         .to receive(:with_connection)
         .and_raise(
-          NotImplementedError.new('ed25519 is not supported')
+          NotImplementedError.new('something is not supported')
         )
     end
 
@@ -580,7 +580,7 @@ def mock_node_results
 
     results.each do |result|
       expect(result.error_hash['kind']).to eq('puppetlabs.tasks/exception-error')
-      expect(result.error_hash['msg']).to eq('ed25519 is not supported')
+      expect(result.error_hash['msg']).to eq('something is not supported')
     end
 
     expect(collector.events.count).to eq(10)