Class: CryptoToolchain::BlackBoxes::RSAUnpaddedMessageRecoveryOracle

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(keypair: CryptoToolchain::BlackBoxes::RSAKeypair.new) ⇒ RSAUnpaddedMessageRecoveryOracle

Returns a new instance of RSAUnpaddedMessageRecoveryOracle.



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

def initialize(keypair: CryptoToolchain::BlackBoxes::RSAKeypair.new)
  @keypair = keypair
  @seen = []
end

Instance Attribute Details

#keypair ⇒ Object (readonly)

Returns the value of attribute keypair.



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

def keypair
  @keypair
end

Instance Method Details

#encrypt(ciphertext) ⇒ Object 



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# File 'lib/crypto_toolchain/black_boxes/rsa_unpadded_message_recovery_oracle.rb', line 19

def encrypt(ciphertext)
  keypair.encrypt(ciphertext, to: keypair.public_key)
end

#execute(ciphertext) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/crypto_toolchain/black_boxes/rsa_unpadded_message_recovery_oracle.rb', line 12

def execute(ciphertext)
  hsh = Digest::SHA256.hexdigest(ciphertext)
  raise ArgumentError.new("Already decrypted") if @seen.include?(hsh)
  @seen << hsh
  keypair.decrypt(ciphertext)
end