Re: cryptography (RSA)

Ruby
1

puts %(encrypted text: #{cipher.inspect})

This is the result:
“\214\t\303n\320Lz\330\271\252\017\355\036\251|\237\212V\270hq
\267X\204\261\3327t\345\353\324\364”

what is that? \214???\t\303n?

irb(main):001:0> 140.chr
=> “\214”
irb(main):002:0> puts 140.chr
î
irb(main):003:0> 140.to_s( 8 )
=> “214”

The .inspect version of a string escapes non-ascii characters. \214
means “the character with the byte value of octal 214, decimal 140”.

\t is a tab character.

Remove the .inspect from your above and you’ll see something more like
the python values you seem to have been expecting.

2

Gavin K. wrote:

puts %(encrypted text: #{cipher.inspect})

This is the result:
“\214\t\303n\320Lz\330\271\252\017\355\036\251|\237\212V\270hq
\267X\204\261\3327t\345\353\324\364”

what is that? \214???\t\303n?

irb(main):001:0> 140.chr
=> “\214”
irb(main):002:0> puts 140.chr
�
irb(main):003:0> 140.to_s( 8 )
=> “214”

The .inspect version of a string escapes non-ascii characters. \214
means “the character with the byte value of octal 214, decimal 140”.

\t is a tab character.

Remove the .inspect from your above and you’ll see something more like
the python values you seem to have been expecting.
thank you, but I’m having a lot of problems anyway

This is the new code:

ruby code:

#!/usr/bin/env ruby
require ‘openssl’

text = “abcdefghijklmnopqrstuvwxyz”
key = “altakey”
alg = “AES-128-ECB”
file_name = “test.encrypted”
file_name_2 = “test.decrypted”

puts %(clear text: “#{text}”)
puts %(symmetric key: “#{key}”)
puts %(cipher alg: “#{alg}”)

puts “–Encrypting–”
des = OpenSSL::Cipher::Cipher.new(alg)
des.encrypt(key)
cipher = des.update(text)
cipher << des.final
puts %(encrypted text: #{cipher.inspect})
puts

file = File.open(file_name, “w”)
file.truncate(0)
file << cipher
file.close

The result:

<8C> �nÐLz�¹ª^Oí^^©|<9F><8A>V¸hq·X<84>±�7tåë�ô

This is the php code:

$text = “abcdefghijklmnopqrstuvwxyz”;
$key = “altakey”;
$alg = “AES-128-ECB”;
$file_name = “test.encrypted”;
$file_name_2 = “test.decrypted”;

echo “decrypted content: $text\n”;
echo “key: $key\n”;

$result = mcrypt_encrypt ( MCRYPT_RIJNDAEL_128 , $key, $text,
MCRYPT_MODE_ECB);

echo “result: $result\n”;

$file = fopen($file_name, “w”);
fwrite($file, $result);
fclose($file);

The result (with a warning):
Warning: mcrypt_encrypt(): Attempt to use an empty IV, which is NOT
recommend in
/usr/local/src/ruby/ruby-1.8.4/sample/openssl/test.encrypt.php on line
13

^_�^<90>S^K<80>¢{^Zò<93>dºEu<98>pñ¢4^\8^M�H<84>S5�åu

And finally, an openssl version:

#!/bin/bash
openssl enc -aes-128-ecb -in test.original -out test.encrypted

The result:

Salted__9Y<80>gí^L�<96>}�®4^FÏ�l�­��&��^Sª&÷ë)±ú9i*�VáI<91>ê

They are throw different results, but the encription algorithm is the
same and the key is the same