Password generator using optparse

Null · **Posted:** Thu Jun 15, 2006 10:46 pm

I had fun writing it, and it might just come in handy, so I thought I'd share. Very Happy

Examples of usage:

code:

$ ruby pgen.rb
soovmuvytv
$ ruby pgen.rb --length=20
bynnugipyeeghdbihcdn
$ ruby pgen.rb --length=20 -n
v3ji3awj1trzjlda5oax
$ ruby pgen.rb --length=20 -np
:sa6vafpummpttjp?qo:

For a full list of options, do

code:

$ ruby pgen.rb --help

code:

#!/usr/bin/env ruby

# pgen.rb
# by Jesse H-K on Thursday, June 15 2006

require 'optparse'

class Array
def random_choice
self[rand(self.length)]
end
end

def parse_options(args)
options = {}

options[:length] = 10

opts = OptionParser.new do |opts|
opts.banner = "Usage: pgen.rb [options]"

opts.on("-n",
"--numbers",
"Include the digits [0-9] in the password.") do |n|
options[:numb] = n
end

opts.on("-p",
"--punctuation",
"Include common punctuation characters in the password.") do |p|
options[:punct] = p
end

opts.on("-u",
"--uppercase",
"Include uppercase letters in the password.") do |u|
options[:upcase] = u
end

opts.on("-l",
"--length [LENGTH]",
Integer,
"The length of the password. Default is 10 characters.") do |l|
options[:length] = l
end
end

opts.parse!
options
end

class PasswordGenerator
@@options = { :numb => ('0'..'9').to_a,
:punct => %w(. , ! ? @ & :),
:upcase => ('A'..'Z').to_a }

def initialize(length, *opts)
@possible = *('a'..'z')
@length = length

parse_content_options(opts)
end

def parse_content_options(opts)
opts.each { |opt| @possible.concat(@@options[opt]) if @@options.key? opt }
end

def generate
(1..@length).inject("") { |passwd, e| passwd << @possible.random_choice }
end

private :parse_content_options
end

options = parse_options(ARGV)

wtd · **Posted:** Fri Jun 16, 2006 7:06 am

Excellent.

code:

class Array
def random_choice
self[rand length]
end
end

Null · **Posted:** Fri Jun 16, 2006 10:14 am

Still not as fun as writing

code:

3.factorial

wtd · **Posted:** Fri Jun 16, 2006 10:19 am

Indeed.

Null · **Posted:** Sat Jun 17, 2006 9:20 pm

!!!

I just realized that the code I posted doesn't work. Somehow, the last line was not included!

here is the correct version:

code:

#!/usr/bin/env ruby

# pgen.rb
# by Jesse H-K on Thursday, June 15 2006

require 'optparse'

class Array
def random_choice
self[rand(self.length)]
end
end

def parse_options(args)
options = {}

options[:length] = 10

opts = OptionParser.new do |opts|
opts.banner = "Usage: pgen.rb [options]"

opts.on("-n",
"--numbers",
"Include the digits [0-9] in the password.") do |n|
options[:numb] = n
end

opts.on("-p",
"--punctuation",
"Include common punctuation characters in the password.") do |p|
options[:punct] = p
end

opts.on("-u",
"--uppercase",
"Include uppercase letters in the password.") do |u|
options[:upcase] = u
end

opts.on("-l [LENGTH]",
"--length [LENGTH]",
Integer,
"The length of the password. Default is 10 characters.") do |l|
options[:length] = l
end
end

opts.parse!
options
end

class PasswordGenerator
@@options = { :numb => ('0'..'9').to_a,
:punct => %w(. , ! ? @ & :),
:upcase => ('A'..'Z').to_a }

def initialize(length, *opts)
@possible = *('a'..'z')
@length = length

parse_content_options(opts)
end

def parse_content_options(opts)
opts.each { |opt| @possible.concat(@@options[opt]) if @@options.key? opt }
end

def generate
(1..@length).inject("") { |passwd, e| passwd << @possible.random_choice }
end

private :parse_content_options
end

options = parse_options(ARGV)
puts PasswordGenerator.new(options[:length], *options.keys).generate

Sorry about that. Sad

Cowzero · **Posted:** Mon Feb 18, 2019 2:33 am

I don't understand this code.

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