Module: JOSE::JWA::XChaCha20Poly1305_RbNaCl

Extended by:
XChaCha20Poly1305_RbNaCl
Included in:
XChaCha20Poly1305_RbNaCl
Defined in:
lib/jose/jwa/xchacha20poly1305_rbnacl.rb

Instance Method Summary collapse

Instance Method Details

#__ruby__? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/jose/jwa/xchacha20poly1305_rbnacl.rb', line 5

def __ruby__?; false; end

#__supported__? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/jose/jwa/xchacha20poly1305_rbnacl.rb', line 7

def __supported__?
  return @supported ||= begin
    begin
      require 'rbnacl/libsodium'
    rescue LoadError
    end
    begin
      require 'rbnacl'
    rescue LoadError
    end
    !!(defined?(RbNaCl::AEAD::XChaCha20Poly1305IETF))
  end
end

#xchacha20poly1305_aead_decrypt(key, nonce, aad, ciphertext, tag) ⇒ Object 



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# File 'lib/jose/jwa/xchacha20poly1305_rbnacl.rb', line 27

def xchacha20poly1305_aead_decrypt(key, nonce, aad, ciphertext, tag)
  cipher = RbNaCl::AEAD::XChaCha20Poly1305IETF.new(key)
  ciphertext_with_tag = [ciphertext, tag].join()
  return cipher.decrypt(nonce, ciphertext_with_tag, aad)
end

#xchacha20poly1305_aead_encrypt(key, nonce, aad, plaintext) ⇒ Object 



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# File 'lib/jose/jwa/xchacha20poly1305_rbnacl.rb', line 21

def xchacha20poly1305_aead_encrypt(key, nonce, aad, plaintext)
  cipher = RbNaCl::AEAD::XChaCha20Poly1305IETF.new(key)
  ciphertext_with_tag = cipher.encrypt(nonce, plaintext, aad)
  return [ciphertext_with_tag[0..-17], ciphertext_with_tag[-16..-1]]
end