1 files changed, 30 insertions, 0 deletions
diff --git a/puppet/modules/sshd/lib/puppet/parser/functions/ssh_keygen.rb b/puppet/modules/sshd/lib/puppet/parser/functions/ssh_keygen.rb
new file mode 100644
index 00000000..e304f242
--- /dev/null
+++ b/puppet/modules/sshd/lib/puppet/parser/functions/ssh_keygen.rb
@@ -0,0 +1,30 @@
+Puppet::Parser::Functions::newfunction(:ssh_keygen, :type => :rvalue, :doc =>
+  "Returns an array containing the ssh private and public (in this order) key
+  for a certain private key path.
+  It will generate the keypair if both do not exist. It will also generate
+  the directory hierarchy if required.
+  It accepts only fully qualified paths, everything else will fail.") do |args|
+    raise Puppet::ParseError, "Wrong number of arguments" unless args.to_a.length == 1
+    private_key_path = args.to_a[0]
+    raise Puppet::ParseError, "Only fully qualified paths are accepted (#{private_key_path})" unless private_key_path =~ /^\/.+/
+    public_key_path = "#{private_key_path}.pub"
+    raise Puppet::ParseError, "Either only the private or only the public key exists" if File.exists?(private_key_path) ^ File.exists?(public_key_path)
+    [private_key_path,public_key_path].each do |path|
+      raise Puppet::ParseError, "#{path} is a directory" if File.directory?(path)
+    end
+
+    dir = File.dirname(private_key_path)
+    unless File.directory?(dir)
+      require 'fileutils'
+      FileUtils.mkdir_p(dir, :mode => 0700)
+    end
+    unless [private_key_path,public_key_path].all?{|path| File.exists?(path) }
+      executor = (Facter.value(:puppetversion).to_i < 3) ? Puppet::Util : Puppet::Util::Execution
+      output = executor.execute(
+        ['/usr/bin/ssh-keygen','-t', 'rsa', '-b', '4096', 
+         '-f', private_key_path, '-P', '', '-q'])
+      raise Puppet::ParseError, "Something went wrong during key generation! Output: #{output}" unless output.empty?
+    end
+    [File.read(private_key_path),File.read(public_key_path)]
+end
+