mgeeky-Penetration-Testing-.../others/encrypt.rb

189 lines
4.5 KiB
Ruby

#!/usr/bin/ruby
#
# Script that performs encryption and decryption of files and directories.
# In latter case producing encrypted ZIP package that will get decompressed automatically
# after decryption.
#
# Mariusz Banach, 2016 v0.1
#
require 'optparse'
require 'io/console'
gem 'rubyzip'
require 'zip/zip'
require 'zip/zipfilesystem'
def encrypt(infile, outfile, ciph, encryption, pass)
gem "crypt"
require 'crypt/blowfish'
require 'crypt/gost'
require 'crypt/idea'
require 'crypt/rijndael'
begin
cipher = case ciph
when "blowfish" then Crypt::Blowfish.new(pass)
when "gost" then Crypt::Gost.new(pass)
when "idea" then Crypt::IDEA.new(pass, encryption ? Crypt::IDEA::ENCRYPT : Crypt::IDEA::DECRYPT)
when "aes" then Crypt::Rijndael.new(pass)
else nil
end
if cipher == nil
raise "unknown cipher."
else
raise "Input file path is empty. Cannot proceed any further" if infile.empty?
if encryption
cipher.encrypt_file(infile, outfile)
else
cipher.decrypt_file(infile, outfile)
end
puts "Operation succeeded."
end
rescue Exception => e
puts "An error ocurred during encryption: #{e}\n"
puts %Q|#{e.backtrace.join "\n\t"}|
end
end
def compress(path, out = nil)
path.sub!(%r[/$], '')
archive = out || File.join(path, File.basename(path))
archive << '.zip'
FileUtils.rm archive, :force => true
Zip::ZipFile.open(archive, 'w') do |zipfile|
Dir["#{path}/**/**"].reject{ |f| f == archive }.each do |file|
zipfile.add(file.sub(path + '/', ''), file)
end
end
archive
end
def decompress(path, out)
Zip::ZipFile.open(path) { |zip_file|
zip_file.each { |f|
f_path = File.join(out, f.name)
FileUtils.mkdir_p(File.dirname(f_path))
zip_file.extract(f, f_path) unless File.exist?(f_path)
}
}
end
# Main function.
if __FILE__ == $0
options = {:cipher => 'aes'}
optsparser = OptionParser.new do |opts|
opts.program_name = "encryption.rb"
opts.banner = "Usage: encryption [options] <mode> <infile> <outfile>\n\nWhere:"\
"\n <mode>\t\t\t Either encrypt or decrypt (or for shorteness: e|d)."\
"\n <infile>\t\t\t Specifies input file or directory path."\
"\n <outfile>\t\t\t Specifies output file path.\n"
opts.separator ""
opts.separator "Additional options:"
supported = %w[blowfish gost idea aes]
opts.on("-c", "--cipher <cipher>", "Supported ciphers (by default 'aes' will be used):",
*supported) do |cipher|
unless supported.include?(cipher)
opts.warn "[!] Unsupported cipher!"
exit
end
options[:cipher] = cipher.downcase
end
opts.on("-h", "--help", "Displays help") do
puts opts
exit
end
end
optsparser.parse!
unless ARGV.length > 2
optsparser.warn "Required <mode> and <file> parameters missing!\n\n#{optsparser}"
exit
end
mode = case ARGV[0].downcase
when 'encrypt', 'enc', 'e' then "encrypt"
when 'decrypt', 'dec', 'd' then "decrypt"
else "error"
end
if mode == "error"
optsparser.warn "You must specify valid <mode> - either 'encrypt' or 'decrypt'!"
exit
end
infile = ARGV[1].chomp
outfile = ARGV[2].chomp
cipher = options[:cipher]
puts "Mode: #{mode.capitalize}"
puts "Cipher: #{cipher.upcase}"
puts "Input file: '#{infile}'"
puts "Output file: '#{outfile}'"
puts ""
compressed = false
tmp = ''
if File.directory?(infile)
require 'tempfile'
d = Tempfile.new('dir')
tmp = d.path.clone
d.close
d.unlink
puts %Q[Compressing specified directory '#{infile}'... ]
begin
tmp = compress(infile, tmp.clone)
compressed = true
rescue Exception => e
puts "[!] Couldn't compress input directory.: #{e}"
File.delete(tmp)
exit
end
else
tmp = infile
end
if File.exists?(outfile)
STDOUT.write "File specified as output file already exists. Do you want to continue? [Y/n]: "
c = $stdin.gets.strip.downcase
unless ["y", "yes"].include?(c) or c.empty?
if compressed
File.delete(tmp)
end
exit
end
end
print 'Enter your encryption key: '
pass = STDIN.noecho(&:gets).chomp
puts ""
begin
encrypt(tmp, outfile, cipher, mode == 'encrypt', pass)
if compressed
File.delete tmp
else
begin
# If decrypted file is a valid zip file - unzip it.
Zip::ZipFile.open(outfile).close
tmp = outfile + '.tmp'
File.rename outfile, tmp
decompress(tmp, outfile)
File.delete tmp
rescue
# Ups, not a ZIP file. Nothing to decompress..
end
end
rescue Exception => e
puts "[!] Operation failed: #{e}"
puts %Q|#{e.backtrace.join "\n\t"}|
end
end