Class: CryptoToolchain::BlackBoxes::NetcatCbcPaddingOracle

Inherits:
Object
  • Object
show all
Defined in:
lib/crypto_toolchain/black_boxes/netcat_cbc_padding_oracle.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(key: Random.new.bytes(16), iv: Random.new.bytes(16)) ⇒ NetcatCbcPaddingOracle

Returns a new instance of NetcatCbcPaddingOracle.



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# File 'lib/crypto_toolchain/black_boxes/netcat_cbc_padding_oracle.rb', line 7

def initialize(key: Random.new.bytes(16), iv: Random.new.bytes(16))
  @key = key
  @iv = iv
  @ciphertext = Base64.strict_decode64('SNXIDUFQW0Ul6GXI4NyU/LMHl+vRlVIYp4pvFstfpP1n1C9Xhbl/bNip6mK5l7TMPS+vw247XTYK3LKIGT4AZVh6zUB97fN3fOamkLvzpmA=')
end

Instance Attribute Details

#ciphertext ⇒ Object (readonly)

Returns the value of attribute ciphertext.



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# File 'lib/crypto_toolchain/black_boxes/netcat_cbc_padding_oracle.rb', line 5

def ciphertext
  @ciphertext
end

Instance Method Details

#execute(str) ⇒ Object 



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# File 'lib/crypto_toolchain/black_boxes/netcat_cbc_padding_oracle.rb', line 13

def execute(str)
  handle = IO.popen(["nc", "bufferoverflow.disappointedmama.com", '6767'], "r+")
  handle.puts(Base64.strict_encode64(str))
  resp = handle.readpartial(1024).strip
  handle.close
  case resp
  when "Failed to decrypt the message"
    false
  when "Successfully received and decrypted the message"
    true
  else
    raise StandardError.new, "Unknown response `#{res}`"
  end
end