Specs

encrypt(
  message :: binary(),
  subscription :: map(),
  padding_length :: non_neg_integer()
) :: map()

Encrypts a web push notification body.

Arguments

• message the body to encrypt
• subscription: See WebPushEncryption.Push.send_web_push/3
• padding_length: An optional padding length

Return value

Returns the encrypted body as well as the necessary information in the following form:

%{ciphertext: ciphertext,               # the encrypted payload
  salt: salt,                           # the generated salt used during the encryption
  server_public_key: server_public_key} # the generated public key used during encryption