Changes to allow OpenSSL3 to work

Author: AnilRh

lib/webpush/encryption.rb

@@ -11,9 +11,8 @@ def encrypt(message, p256dh, auth)
       group_name = 'prime256v1'
       salt = Random.new.bytes(16)
 
-      server = OpenSSL::PKey::EC.new(group_name)
-      server.generate_key
-      server_public_key_bn = server.public_key.to_bn
+      key = OpenSSL::PKey::EC.generate(group_name)
+      server_public_key_bn = key.public_key.to_bn
 
       group = OpenSSL::PKey::EC::Group.new(group_name)
       client_public_key_bn = OpenSSL::BN.new(Webpush.decode64(p256dh), 2)

lib/webpush/vapid_key.rb

@@ -31,8 +31,7 @@ def self.from_pem(pem)
     attr_reader :curve
 
     def initialize
-      @curve = OpenSSL::PKey::EC.new('prime256v1')
-      @curve.generate_key
+      @curve = OpenSSL::PKey::EC.generate('prime256v1')
     end
 
     # Retrieve the encoded elliptic curve public key for VAPID protocol