Method: PDF::Reader::SecurityHandlerFactory.standard_v5?

Defined in:
lib/pdf/reader/security_handler_factory.rb

.standard_v5?(encrypt) ⇒ Boolean

This handler supports both

  • AES-256 encryption defined in PDF 1.7 Extension Level 3 (‘revision 5’)

  • AES-256 encryption defined in PDF 2.0 (‘revision 6’)

Returns:

  • (Boolean) 


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# File 'lib/pdf/reader/security_handler_factory.rb', line 68

def self.standard_v5?(encrypt)
  return false if encrypt.nil?

  filter = encrypt.fetch(:Filter, :Standard)
  version = encrypt.fetch(:V, 0)
  revision = encrypt.fetch(:R, 0)
  algorithm = encrypt.fetch(:CF, {}).fetch(encrypt[:StmF], {}).fetch(:CFM, nil)
  (filter == :Standard) && (encrypt[:StmF] == encrypt[:StrF]) &&
      ((version == 5) && (revision == 5 || revision == 6) && (algorithm == :AESV3))
end