Class: Fernet::Secret

Inherits:
Object
  • Object
show all
Defined in:
lib/fernet/secret.rb

Overview

Internal: Encapsulates a secret key, a 32-byte sequence consisting

of an encryption and a signing key.

Defined Under Namespace

Classes: InvalidSecret

Instance Method Summary collapse

Constructor Details

#initialize(secret) ⇒ Secret

Internal - Initialize a Secret

secret - the secret, optionally encoded with either standard or

URL safe variants of Base64 encoding

Raises Fernet::Secret::InvalidSecret if it cannot be decoded or is

not of the expected length



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# File 'lib/fernet/secret.rb', line 17

def initialize(secret)
  if secret.bytesize == 32
    @secret = secret
  else
    begin
      @secret = Base64.urlsafe_decode64(secret)
    rescue ArgumentError
      @secret = Base64.decode64(secret)
    end
    unless @secret.bytesize == 32
      raise InvalidSecret,
        "Secret must be 32 bytes, instead got #{@secret.bytesize}"
    end
  end
end

Instance Method Details

#encryption_key ⇒ Object

Internal: Returns the portion of the secret token used for encryption



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# File 'lib/fernet/secret.rb', line 34

def encryption_key
  @secret.slice(16, 16)
end

#signing_key ⇒ Object

Internal: Returns the portion of the secret token used for signing



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# File 'lib/fernet/secret.rb', line 39

def signing_key
  @secret.slice(0, 16)
end