Encrypting/decrypting 3DES in Ruby
I have a key.bin file which content is something along the lines of:
-12, 110, 93, 14, -48, ...
This is being used by a service to decrypt 3DES content, but I need to encrypt it via Ruby.
I've tried loads of scenarios with how to set the key and what to do with it, but to no avail as of yet:
- Tried splitting the key by , and converting each number to hex, concatenating the hex values to make the key
- Tried converting the number string to binary
- Tried converting the resulting hex to binary
I assume what I need to do is something simple like:
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 sample:
-62,-53,124,-110,37,-88,-48,31,-57,93,70,-101,44,69,-88,-57,-123,-99,118,-119,110,55,11,14
Data sample:
NEb2b9sYXgod6mTvaRv+MRsTJvIiTTI9VjnDGcxjxcN5qBH7FXvxYI6Oj16FeKKsoQvjAmdju2SQ
ifJqPJTl97xeEbjdwm+W8XJnWs99ku85EznVBhzQxI1H2jPiZIcrqIVCWdd/OQun7AjK4w2+5yb7
DPN2OiCIEOz2zK6skJrBw3oTEHpXrSEhydOYxqI+c5hC4z3k5nktN6WSVLIo8EAjwenHPMDxboWF
ET8R+QM5EznVBhzQxI1H2jPiZIcrqIVCWdd/OQun7AjK4开发者_运维问答w2+5yb7DPN2OiCIFqk4LRwEVq16jvKE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=
Got it working!
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)
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