Module: CcipherFactory::AsymKeyCipher::ECCDecrypt

Includes:
Common, TR::CondUtils
Defined in:
lib/ccipher_factory/asymkey_cipher/ecc/ecc_decrypt.rb

Defined Under Namespace

Classes: ECCCipherError

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Common

#attach_mode, #cleanup_intOutputBuf, #cleanup_intOutputFile, #detach_mode, #disposeOutput, #intOutputBuf, #intOutputFile, #is_attach_mode?, #is_output_given?, #output, #output_obj, #sanitize_symbol, #write_to_output

Instance Attribute Details

#decryption_key ⇒ Object

Returns the value of attribute decryption_key.



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# File 'lib/ccipher_factory/asymkey_cipher/ecc/ecc_decrypt.rb', line 15

def decryption_key
  @decryption_key
end

Instance Method Details

#decrypt_final ⇒ Object 



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# File 'lib/ccipher_factory/asymkey_cipher/ecc/ecc_decrypt.rb', line 64

def decrypt_final

  @cipher.decrypt_final

end

#decrypt_init(opts = { }, &block) ⇒ Object 



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# File 'lib/ccipher_factory/asymkey_cipher/ecc/ecc_decrypt.rb', line 16

def decrypt_init(opts = {  }, &block)

  #raise ECCCipherError, "Decryption keypair is mandatory" if is_empty?(eccKeypair)

  #@eccKeypair = eccKeypair

  if block
    instance_eval(&block)
    decrypt_final
  else
    self
  end

end

#decrypt_update_cipher(cipher) ⇒ Object

Raises:



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# File 'lib/ccipher_factory/asymkey_cipher/ecc/ecc_decrypt.rb', line 58

def decrypt_update_cipher(cipher)
  raise ECCCipherError, "Please update meta first before update cipher" if is_empty?(@cipher) 

  @cipher.decrypt_update_cipher(cipher)
end

#decrypt_update_meta(meta) ⇒ Object

Raises:



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# File 'lib/ccipher_factory/asymkey_cipher/ecc/ecc_decrypt.rb', line 31

def decrypt_update_meta(meta)

  raise ECCCipherError, "Output is required" if not is_output_given?

  ts = BinStruct.instance.struct_from_bin(meta)
  senderPub = ts.sender_public
  cipherConf = ts.cipher_config
  keyConf = ts.key_config
  
  sender = Ccrypto::AlgoFactory.engine(Ccrypto::ECCPublicKey).to_key(senderPub)
  derived = @decryption_key.derive_dh_shared_secret(sender)

  sessKey = DerivedSymKey.from_encoded(keyConf) do |ops|
    case ops
    when :password
      derived
    end
  end

  @cipher = SymKeyCipher.decryptor
  @cipher.output(@output)
  @cipher.key = sessKey
  @cipher.decrypt_init
  @cipher.decrypt_update_meta(cipherConf)

end

#logger ⇒ Object 



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# File 'lib/ccipher_factory/asymkey_cipher/ecc/ecc_decrypt.rb', line 70

def logger
  if @logger.nil?
    @logger = Tlogger.new
    @logger.tag = :ecc_dec
  end
  @logger
end