Module: Origami::Encryption

Defined in:
lib/origami/encryption.rb

Overview

Module to provide support for encrypting and decrypting PDF documents.

Defined Under Namespace

Modules: EncryptedDocument, EncryptedObject, EncryptedStream, EncryptedString, Identity, Standard Classes: AES, ARC4, CryptFilterDictionary, EncryptionDictionary

Class Method Summary collapse

Class Method Details

.rand_bytes(n) ⇒ Object

Generates n random bytes from a fast PRNG.



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# File 'lib/origami/encryption.rb', line 303

def self.rand_bytes(n)
  ::Array.new(n) { rand(256) }.pack("C*")
end

.strong_rand_bytes(n) ⇒ Object

Generates n random bytes from a crypto PRNG.



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# File 'lib/origami/encryption.rb', line 310

def self.strong_rand_bytes(n)
  if Origami::OPTIONS[:use_openssl]
    OpenSSL::Random.random_bytes(n)
  elsif RUBY_VERSION >= '1.9'
    Random.new.bytes(n)
  else
    self.rand_bytes(n)
  end
end