Module: Password

Extended by:
Password
Included in:
Password
Defined in:
lib/password/password.rb

Overview

gist.github.com/2040373 Ask for a password from CLI, if it exists.

Instance Method Summary collapse

Instance Method Details

#ask(prompt = "Enter password: ") ⇒ Object 



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# File 'lib/password/password.rb', line 125

def ask(prompt = "Enter password: ")
  %w|windows unix jruby|.each do |platform|
    eval "return ask_for_password_on_#{platform}(prompt) if #{platform}?"
  end
  raise "Could not read password on unknown Ruby platform: #{RUBY_DESCRIPTION}"
end

#ask_for_password_on_jruby(prompt = "Enter password: ") ⇒ Object 



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# File 'lib/password/password.rb', line 79

def ask_for_password_on_jruby(prompt = "Enter password: ")
  raise 'Could not ask for password because there is no interactive terminal (tty)' unless $stdin.tty?

  password=''

  require 'java'
  include_class 'java.lang.System'
  include_class 'java.io.Console'

  unless prompt.nil?
    $stderr.print prompt 
    $stderr.flush  
  end

  console = System.console()
  return unless console != java.null
  loop do
    break unless (read_passwd = console.readPassword()) != java.null
    passwd_chr = java.lang.String.new(read_passwd).to_string
    case passwd_chr
      when "\e" # ESC
        password.length.times do |i|
          password[i] = ' '
        end
        return nil
      when "", "\r", "\n" # Enter (for certain), ..., ...
        break
      when "\177", "\b" # Ctrl-H, Bkspace
        if password.length > 0       
          password[-1] = ' '
          password.slice!(-1, 1)
        end
      when "\004" # Ctrl-D
        password.length.times do |i|
          password[i] = ' '
        end
        password = ''
      else
        password << passwd_chr
    end
  end

  $stderr.puts
  passwd
end

#ask_for_password_on_unix(prompt = "Enter password: ") ⇒ Object

— Lé code



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# File 'lib/password/password.rb', line 37

def ask_for_password_on_unix(prompt = "Enter password: ")
  raise 'Could not ask for password because there is no interactive terminal (tty)' unless $stdin.tty?
  unless prompt.nil?
    $stderr.print prompt 
    $stderr.flush
  end
  raise 'Could not disable echo to ask for password security' unless system 'stty -echo -icanon'
  password = $stdin.gets
  password.chomp! if password
  password
ensure
  raise 'Could not re-enable echo while securely asking for password' unless system 'stty echo icanon'
end

#ask_for_password_on_windows(prompt = "Enter password: ") ⇒ Object 



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# File 'lib/password/password.rb', line 51

def ask_for_password_on_windows(prompt = "Enter password: ")
  raise 'Could not ask for password because there is no interactive terminal (tty)' unless $stdin.tty?

  require 'Win32API'

  char = nil
  password = ''

  unless prompt.nil?
    $stderr.print prompt 
    $stderr.flush
  end

  while char = Win32API.new("crtdll", "_getch", [ ], "L").Call do
    break if char == 10 || char == 13 # return or newline
    if char == 127 || char == 8 # backspace and delete
      password[-1] = ' '
      password.slice!(-1, 1)
    else
      password << char.chr
    end
  end
  char = ' '

  $stderr.puts
  password
end

#beos? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/password/password.rb', line 11

def beos?    ; RUBY_PLATFORM =~ /beos/i      end

#bsd? ⇒ Boolean

patches welcome: rh, oel, sl, slc, cent, fed, ubt, deb, mint, sles, suse, arch, parabola, nixos, ad ⧝

Returns:

  • (Boolean) 


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# File 'lib/password/password.rb', line 27

def bsd?     ; freebsd? || netbsd? || openbsd?    end

#freebsd? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/password/password.rb', line 28

def freebsd? ; RUBY_PLATFORM =~ /freebsd/i        end

#ios? ⇒ Boolean

e.g.. ‘x86_64-darwin11.3.0’ MRI 1.9.3 Lion

'x86_64-apple-darwin11.3.0' Rubinius       Lion
'i686-darwin11.3.0'         RubyEnterprise Lion
'universal-darwin10.0'      MacRuby        Lion

Returns:

  • (Boolean) 


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# File 'lib/password/password.rb', line 21

def ios?     ; RUBY_PLATFORM =~ /arm-darwin/i     end

#jruby? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/password/password.rb', line 9

def jruby?   ; RUBY_PLATFORM =~ /java/i      end

#linux? ⇒ Boolean

Can you spot the implication?

Returns:

  • (Boolean) 


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# File 'lib/password/password.rb', line 25

def linux?   ; RUBY_PLATFORM =~ /linux/i          end

#mac? ⇒ Boolean

NOTE: 99.999% of mac detection code has a subtle flaw.

i.e.:    RUBY_PLATFORM =~ /darwin|apple|mac/i

Returns:

  • (Boolean) 


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# File 'lib/password/password.rb', line 16

def mac?     ; RUBY_PLATFORM =~ /.*(sal|86).*-darwin1/i end

#netbsd? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/password/password.rb', line 29

def netbsd?  ; RUBY_PLATFORM =~ /netbsd/i         end

#openbsd? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/password/password.rb', line 30

def openbsd? ; RUBY_PLATFORM =~ /openbsd/i        end

#os2? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/password/password.rb', line 10

def os2?     ; RUBY_PLATFORM =~ /os2/i       end

#solaris? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/password/password.rb', line 31

def solaris? ; RUBY_PLATFORM =~ /solaris/i        end

#unix? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/password/password.rb', line 12

def unix?    ; !jruby? && !windows? && !os2? && !beos? end

#windows? ⇒ Boolean

— Platform inspectors

Returns:

  • (Boolean) 


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# File 'lib/password/password.rb', line 8

def windows? ; RUBY_PLATFORM =~ /win(32|dows|ce)|djgpp|(ms|cyg|bcc)win|mingw32/i end