Module: Origami::Encryption::EncryptedString

Includes:
EncryptedObject
Defined in:
lib/origami/encryption.rb

Overview

Module for encrypted String.

Instance Attribute Summary

Attributes included from EncryptedObject

#decrypted

Class Method Summary collapse

Instance Method Summary collapse

Methods included from EncryptedObject

#post_build

Class Method Details

.extended(obj) ⇒ Object 



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# File 'lib/origami/encryption.rb', line 388

def self.extended(obj)
  obj.decrypted = false
end

Instance Method Details

#decrypt! ⇒ Object

Raises:



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# File 'lib/origami/encryption.rb', line 416

def decrypt!
  return self if @decrypted

  cipher = document.string_encryption_cipher
  raise EncryptionError, "Cannot find string encryption filter" if cipher.nil?

  key = compute_object_key(cipher)

  replace(cipher.decrypt(key, to_str))
  @decrypted = true

  self
end

#encrypt! ⇒ Object

Raises:



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# File 'lib/origami/encryption.rb', line 392

def encrypt!
  return self unless @decrypted

  cipher = document.string_encryption_cipher
  raise EncryptionError, "Cannot find string encryption filter" if cipher.nil?

  key = compute_object_key(cipher)

  encrypted_data =
    if (cipher == RC4) || (cipher == Identity)
      cipher.encrypt(key, value)
    else
      iv = Encryption.rand_bytes(AES::BLOCKSIZE)
      cipher.encrypt(key, iv, value)
    end

  @decrypted = false

  replace(encrypted_data)
  freeze

  self
end