1 files changed, 19 insertions, 0 deletions
diff --git a/lib/net/imap/authenticators/plain.rb b/lib/net/imap/authenticators/plain.rb
new file mode 100644
index 0000000000..0829476c51
--- /dev/null
+++ b/lib/net/imap/authenticators/plain.rb
@@ -0,0 +1,19 @@
+# frozen_string_literal: true
+
+# Authenticator for the "+PLAIN+" SASL mechanism.  See Net::IMAP#authenticate.
+#
+# See RFC4616[https://tools.ietf.org/html/rfc4616] for the specification.
+class Net::IMAP::PlainAuthenticator
+  def process(data)
+    return "\0#{@user}\0#{@password}"
+  end
+
+  private
+
+  def initialize(user, password)
+    @user = user
+    @password = password
+  end
+
+  Net::IMAP.add_authenticator "PLAIN", self
+end