Class: CryptoToolbox::Oracles::PaddingOracle::MemoryOracle

Inherits:
Object
  • Object
show all
Defined in:
lib/crypto-toolbox/oracles/padding_oracle/memory_oracle.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ MemoryOracle

Returns a new instance of MemoryOracle.



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# File 'lib/crypto-toolbox/oracles/padding_oracle/memory_oracle.rb', line 29

def initialize
  @key   = SecureRandom.random_bytes(16)
  @iv    = SecureRandom.random_bytes(16)
  @secret_plaintext = CryptBuffer.from_base64(PlaintextSelection::sample).str
end

Instance Attribute Details

#secret_plaintext ⇒ Object (readonly)

for result validation only. I can trust myself



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# File 'lib/crypto-toolbox/oracles/padding_oracle/memory_oracle.rb', line 27

def secret_plaintext
  @secret_plaintext
end

Instance Method Details

#connect ⇒ Object 



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# File 'lib/crypto-toolbox/oracles/padding_oracle/memory_oracle.rb', line 39

def connect; end

#disconnect ⇒ Object 



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# File 'lib/crypto-toolbox/oracles/padding_oracle/memory_oracle.rb', line 40

def disconnect; end

#sample_ciphertext ⇒ Object 



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# File 'lib/crypto-toolbox/oracles/padding_oracle/memory_oracle.rb', line 35

def sample_ciphertext
  @ciphertext ||= generate_ciphertext
end

#valid_padding?(input, custom_block_amount = nil) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/crypto-toolbox/oracles/padding_oracle/memory_oracle.rb', line 42

def valid_padding?(input,custom_block_amount=nil)
  # openssl will throw on invalid padding
  begin
    block  = CryptBuffer(input)
    result = CryptBuffer(decrypt(block))
    result.validate_padding!
  rescue CryptBufferConcern::Padding::InvalidPkcs7Padding => ex
    false
  end
end