Module: HrrRbSsh::Transport::EncryptionAlgorithm::Functionable

Includes:
Loggable
Included in:
Aes128Cbc, Aes128Ctr, Aes192Cbc, Aes192Ctr, Aes256Cbc, Aes256Ctr, Arcfour, BlowfishCbc, Cast128Cbc, ThreeDesCbc
Defined in:
lib/hrr_rb_ssh/transport/encryption_algorithm/functionable.rb

Instance Attribute Summary

Attributes included from Loggable

#log_key, #logger

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Loggable

#log_debug, #log_error, #log_fatal, #log_info, #log_warn

Class Method Details

.included(klass) ⇒ Object 



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# File 'lib/hrr_rb_ssh/transport/encryption_algorithm/functionable.rb', line 12

def self.included klass
  cipher = OpenSSL::Cipher.new(klass::CIPHER_NAME)
  klass.const_set(:IV_LENGTH,  cipher.iv_len)
  klass.const_set(:KEY_LENGTH, cipher.key_len)
end

Instance Method Details

#block_size ⇒ Object 



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# File 'lib/hrr_rb_ssh/transport/encryption_algorithm/functionable.rb', line 32

def block_size
  self.class::BLOCK_SIZE
end

#decrypt(data) ⇒ Object 



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# File 'lib/hrr_rb_ssh/transport/encryption_algorithm/functionable.rb', line 52

def decrypt data
  if data.empty?
    data
  else
    @cipher.update(data) + @cipher.final
  end
end

#encrypt(data) ⇒ Object 



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# File 'lib/hrr_rb_ssh/transport/encryption_algorithm/functionable.rb', line 44

def encrypt data
  if data.empty?
    data
  else
    @cipher.update(data) + @cipher.final
  end
end

#initialize(direction, iv, key, logger: nil) ⇒ Object 



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# File 'lib/hrr_rb_ssh/transport/encryption_algorithm/functionable.rb', line 18

def initialize direction, iv, key, logger: nil
  self.logger = logger
  @cipher = OpenSSL::Cipher.new(self.class::CIPHER_NAME)
  case direction
  when Direction::OUTGOING
    @cipher.encrypt
  when Direction::INCOMING
    @cipher.decrypt
  end
  @cipher.padding = 0
  @cipher.iv  = iv
  @cipher.key = key
end

#iv_length ⇒ Object 



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# File 'lib/hrr_rb_ssh/transport/encryption_algorithm/functionable.rb', line 36

def iv_length
  self.class::IV_LENGTH
end

#key_length ⇒ Object 



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# File 'lib/hrr_rb_ssh/transport/encryption_algorithm/functionable.rb', line 40

def key_length
  self.class::KEY_LENGTH
end