Class: Cheffish::KeyFormatter

Inherits:
Object
  • Object
show all
Defined in:
lib/cheffish/key_formatter.rb

Class Method Summary collapse

Class Method Details

.decode(str, pass_phrase = nil, filename = '') ⇒ Object

Returns nil or key, format



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# File 'lib/cheffish/key_formatter.rb', line 12

def self.decode(str, pass_phrase=nil, filename='')
  key_format = {}
  key_format[:format] = format_of(str)

  case key_format[:format]
  when :openssh
    key = decode_openssh_key(str, filename)
  else
    begin
      key = OpenSSL::PKey.read(str) { pass_phrase }
    rescue
      return nil
    end
  end

  key_format[:type] = type_of(key)
  key_format[:size] = size_of(key)
  key_format[:pass_phrase] = pass_phrase if pass_phrase
  # TODO cipher, exponent

  [key, key_format]
end

.encode(key, key_format) ⇒ Object 



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# File 'lib/cheffish/key_formatter.rb', line 35

def self.encode(key, key_format)
  format = key_format[:format] || :pem
  case format
  when :openssh
    encode_openssh_key(key)
  when :pem
    if key_format[:pass_phrase]
      cipher = key_format[:cipher] || 'DES-EDE3-CBC'
      key.to_pem(OpenSSL::Cipher.new(cipher), key_format[:pass_phrase])
    else
      key.to_pem
    end
  when :der
    key.to_der
  when :fingerprint, :pkcs1md5fingerprint
    hexes = Digest::MD5.hexdigest(key.to_der)
    # Put : between every pair of hexes
    hexes.scan(/../).join(':')
  when :rfc4716md5fingerprint
    type, base64_data, etc = encode_openssh_key(key).split
    data = Base64.decode64(base64_data)
    hexes = Digest::MD5.hexdigest(data)
    hexes.scan(/../).join(':')
  when :pkcs8sha1fingerprint
    pkcs8_pem = key.to_pem_pkcs8
    pkcs8_base64 = pkcs8_pem.split("\n").reject { |l| l =~ /^-----/ }
    pkcs8_data = Base64.decode64(pkcs8_base64.join)
    hexes = Digest::SHA1.hexdigest(pkcs8_data)
    hexes.scan(/../).join(':')
  else
    raise "Unrecognized key format #{format}"
  end
end