3DES Encryption / Decryption in Ruby

Question

I have a key.bin file whose contents are something like:

-12, 110, 93, 14, -48, ... 

This is used by the service to decrypt 3DES content, but I need to encrypt it through Ruby.

I tried many scenarios with how to install the key and what to do with it, but so far nothing has worked out:

• Tried to break the key and convert each number to hexadecimal, combining the hexadecimal values ​​to make the key
• Tried to convert a numeric string to binary
• I tried to convert the resulting hex to binary

I assume that I need to do something simple:

 des = OpenSSL::Cipher::Cipher.new('des3') des.decrypt des.key = mistery # this step is where i'm having problems at final = des.update(encrypted) + des.final 

Any ideas on what I should do with this key?

Key:

 -62,-53,124,-110,37,-88,-48,31,-57,93,70,-101,44,69,-88,-57,-123,-99,118,-119,110,55,11,14 

Sample data:

 NEb2b9sYXgod6mTvaRv+MRsTJvIiTTI9VjnDGcxjxcN5qBH7FXvxYI6Oj16FeKKsoQvjAmdju2SQ ifJqPJTl97xeEbjdwm+W8XJnWs99ku85EznVBhzQxI1H2jPiZIcrqIVCWdd/OQun7AjK4w2+5yb7 DPN2OiCIEOz2zK6skJrBw3oTEHpXrSEhydOYxqI+c5hC4z3k5nktN6WSVLIo8EAjwenHPMDxboWF ET8R+QM5EznVBhzQxI1H2jPiZIcrqIVCWdd/OQun7AjK4w2+5yb7DPN2OiCIFqk4LRwEVq16jvKE vjz6T4/G34kx6CEx/JdZ1LdvxC3xYQIcwS0wVnmtxorFm4q5QQFHzNKQ5chrGZzDkFzAogsZ2l2B vcvlwgajNGHmxuVU83Ldn1e5rin7QqpjASqeDGFQHkiSbp4x6axVce2OGgfFpZdzCM7y6jLPpOlX LOC/Bs1vTwMzcBNRB/Fo4nsX9i4It8Spm228XQNUpQe4i9QGe/4AyKIhHoM8DkXwPZ6rWp0W0UMe keXjg41cED1JwjAAQSP3RYITB78bu+CEZKPOt2tQ2BvSw55mnFcvjIAYVQxCHliQ4PwgceHrnsZz 5aagC0QJ3oOKw9O0dlkVE3IM6KTBMcuZOZF19nCqxMFacQoDxjJY8tOJoN0Fe4Boz2FPyuggfLz9 yhljVJhxqOlTd8eA34Ex8SdC+5NDByAMumjzcPcXL8YVpSN85gytfd+skXhz3npmJ0dmZZOouu0Z vMmlaCqw96Sy0L1mHLKbjqmZ/W57OBNRB/Fo4nsX9i4It8Spm228XQNUpQe4i9QGe/4AyKIhHoM8 DkXwPZ5tXdq1dRG6IaS51oNzFFlOoP3wTJuOTpj+zQOBMMOi4ENFyyEwYbG/qE+uY8rVwBOUHv9b Yd9byvOZbnHDuf4oaWRZ+4K3s2NkEblDF9wU6Mb0ZqnLEJsypjrorH1cNIodIDu8nME1nD5bIDF6 XNrWC6pk6AV6eYQvNJw2QDz0RBD15fz/fAXCvbaCLDnhBKpLXrRbQdV+jxx2ipeC2ceMLLRFRPuR B+ycYht65lWh4jNjoEsBXGFKiT0bSX6Lx/ZQD3twJWbML8ifRhw7SW0jOkUF+dAfXYNaD6nqA6Xq TkcsDGaJsVq8wwCIWNh6tDRSw7ba4c391147kmnqEgXdKmmnEzUfHtpRw88C0/u0qj809hB4qB0B lxj/87aDo4VOz9S4jjtk849CxtA/a9+532A4YlXjsPt/f0KZ2drAGEr1VSWzaLh/sMwP5tznmPaK uozS6C74gMNdhtNMFz0HONcYecS0hg4lrdRyljROgzC33QoBIHbQXJrG0OXE3+81uhJwusEnFaD9 8Eybjk6YeNk3oxL3C5fx/xXgFmhcLLGdxRe/am0jqA1gV6MyQFUKtzdnNOUYpHkYXT9Ea7YYln4Q D96Z9AI5EznVBhzQxI1H2jPiZIcrqIVCWdd/OQun7AjK4w2+5yb7DPN2OiCIFqk4LRwEVq16jvKE vjz6T4/G34kx6CEx/JdZ1LdvxC3iEcYTrEH9kKhPrmPK1cATlB7/W2HfW8rzmW5xw7n+KGlkWfuC t7NjZBG5QxfcFOjG9GapyxCbMqY66Kx9XDSKHSA7vJzBNZw+WyAxelza1guqZOgFenmElSgtUOo7 TEunuphaMIEQgo0udojG6dm2FtRmA4yntNCnCDzGTY72nrFBz3EZmVXGEm6X3Xd5Ito= 

Answer 1

It worked!

Here's how:

decryption

 def read_key(key_file) File.read(key_file).split(',').map { |x| x.to_i }.pack('c*') end des = OpenSSL::Cipher::Cipher.new('des-ede3') des.decrypt des.key = read_key('key.bin') result = des.update(decoded) + des.final 

Encryption

 def read_key(key_file) File.read(key_file).split(',').map { |x| x.to_i }.pack('c*') end des2 = OpenSSL::Cipher::Cipher.new('des-ede3') des2.encrypt des2.key = read_key('key.bin') result = des2.update(result) + des2.final puts Base64.encode64(result)