Class: EncryptPassword

Inherits:
Chef::Knife
  • Object
show all
Defined in:
lib/chef/knife/EncryptPassword.rb

Instance Method Summary collapse

Instance Method Details

#equal?(db, dbi, key, value) ⇒ Boolean

Returns:



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# File 'lib/chef/knife/EncryptPassword.rb', line 139

def equal?(db, dbi, key, value)
  data_bag_path = "./data_bags/#{db}"

  shared_secret = get_shared_secret(db, dbi)
  dbi = JSON.parse(open("#{data_bag_path}/#{dbi}.json").read())
  dbi = Chef::EncryptedDataBagItem.new dbi, shared_secret

  dbi[key] == value
end

#get_shared_secret(db, dbi) ⇒ Object 



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# File 'lib/chef/knife/EncryptPassword.rb', line 149

def get_shared_secret(db, dbi)
  data_bag_path = "./data_bags/#{db}"

  private_key = OpenSSL::PKey::RSA.new(open(Chef::Config[:client_key]).read())
  key = File.exists?("#{data_bag_path}/#{dbi}_keys.json") ? JSON.parse(open("#{data_bag_path}/#{dbi}_keys.json").read()) : nil
  
  begin      
    private_key.private_decrypt(Base64.decode64(key[Chef::Config[:node_name]]))
  rescue
    nil
  end
end

#run ⇒ Object 



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# File 'lib/chef/knife/EncryptPassword.rb', line 31

def run
  unless config[:search]
    puts("You must supply either -S or --search")
    exit 1
  end
  unless config[:username]
    puts("You must supply either -U or --username")
    exit 1
  end
  unless config[:password]
    puts("You must supply either -P or --password")
    exit 1
  end
  unless config[:admins]
    puts("You must supply either -A or --admins")
    exit 1
  end
  Shef::Extensions.extend_context_object(self)

  data_bag = "passwords"
  data_bag_path = "./data_bags/#{data_bag}"

  node_search = config[:search]
  admins = config[:admins]
  username = config[:username]
  password = config[:password]
  current_dbi = Hash.new
  current_dbi_keys = Hash.new
  if File.exists?("#{data_bag_path}/#{username}_keys.json") && File.exists?("#{data_bag_path}/#{username}.json")
    current_dbi_keys = JSON.parse(open("#{data_bag_path}/#{username}_keys.json").read())
    current_dbi = JSON.parse(open("#{data_bag_path}/#{username}.json").read())

    unless equal?(data_bag, username, "password", password)
      puts("FATAL: Password in #{data_bag_path}/#{username}.json does not match password supplied!")
      exit 1
    end
  else
    puts("INFO: Existing data bag #{data_bag}/#{username} does not exist in #{data_bag_path}, continuing as fresh build...")
  end

  # Get the public keys for all of the nodes to encrypt for.  Skipping the nodes that are already in
  # the data bag
  keyfob = Hash.new
  public_keys = search(:node, node_search).map(&:name).map do |client|
    begin
      if current_dbi_keys[client]
        puts("INFO: Skipping #{client} as it is already in the data bag...")
      else
        puts("INFO: Adding #{client} to public_key array...")
        cert_der = api.get("clients/#{client}")['certificate']
        cert = OpenSSL::X509::Certificate.new cert_der
        keyfob[client]=OpenSSL::PKey::RSA.new cert.public_key
      end
    rescue Exception => node_error
      puts("WARNING: Caught exception: #{node_error.message} while processing #{client}, so skipping...")
    end
  end
  
  # Get the public keys for the admin users, skipping users already in the data bag
  public_keys << admins.split(",").map do |user|
    begin
      if current_dbi_keys[user]
        puts("INFO: Skipping #{user} as it is already in the data bag")
      else
        puts("INFO: Adding #{user} to public_key array...")
        public_key = api.get("users/#{user}")['public_key']
        keyfob[user] = OpenSSL::PKey::RSA.new public_key
      end
    rescue Exception => user_error
      puts("WARNING: Caught exception: #{user_error.message} while processing #{user}, so skipping...")
    end
  end

  if public_keys.length == 0
    puts "A node search for #{node_search} returned no results" 
    exit 1
  end

  # Get the current secret, is nil if current secret does not exist yet
  current_secret = get_shared_secret(data_bag, username)
  data_bag_shared_key = current_secret ? current_secret : OpenSSL::PKey::RSA.new(245).to_pem.lines.to_a[1..-2].join
  enc_db_key_dbi = current_dbi_keys.empty? ? Mash.new({id: "#{username}_keys"}) : current_dbi_keys

  # Encrypt for every new node not already in the data bag
  keyfob.each do |node,pkey|
    puts("INFO: Encrypting for #{node}...")
    enc_db_key_dbi[node] = Base64.encode64(pkey.public_encrypt(data_bag_shared_key))
  end unless keyfob.empty?

  # Delete existing keys data bag and rewrite the whole bag from memory
  puts("INFO: Writing #{data_bag_path}/#{username}_keys.json...")
  File.delete("#{data_bag_path}/#{username}_keys.json") if File.exists?("#{data_bag_path}/#{username}_keys.json")
  File.open("#{data_bag_path}/#{username}_keys.json",'w').write(JSON.pretty_generate(enc_db_key_dbi))

  # If the existing password bag does not exist, write it out with the correct password
  # Otherwise leave the existing bag alone
  if current_dbi.empty?
    dbi_mash = Mash.new({id: username, username: username, password: password})
    dbi = Chef::DataBagItem.from_hash(dbi_mash)
    edbi = Chef::EncryptedDataBagItem.encrypt_data_bag_item(dbi, data_bag_shared_key)

    puts("INFO: Writing #{data_bag_path}/#{username}.json...")
    open("#{data_bag_path}/#{username}.json",'w').write(JSON.pretty_generate(edbi))
  end

  puts("INFO: Successfully wrote #{data_bag_path}/#{username}.json & #{data_bag_path}/#{username}_keys.json!")
end