88 lines
2.8 KiB
Ruby
88 lines
2.8 KiB
Ruby
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# frozen_string_literal: true
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require 'mail/network/delivery_methods/smtp'
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# Monkey patch mail 2.8.1 to make it possible to disable STARTTLS.
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# without having to change existing settings.
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# This brings in changes from https://github.com/mikel/mail/pull/1536,
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# which has not been released yet.
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module Mail
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class SMTP
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def initialize(values)
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self.settings = DEFAULTS
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settings[:enable_starttls_auto] = nil
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settings.merge!(values)
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end
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private
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# `key` is said to be provided when `settings` has a non-nil value for `key`.
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def setting_provided?(key)
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!settings[key].nil?
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end
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# Yields one of `:always`, `:auto` or `false` based on `enable_starttls` and `enable_starttls_auto` flags.
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# Yields `false` when `smtp_tls?`.
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def smtp_starttls
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return false if smtp_tls?
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if setting_provided?(:enable_starttls) && settings[:enable_starttls]
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# enable_starttls: provided and truthy
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case settings[:enable_starttls]
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when :auto then :auto
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when :always then :always
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else
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:always
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end
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elsif setting_provided?(:enable_starttls_auto)
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# enable_starttls: not provided or false
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settings[:enable_starttls_auto] ? :auto : false
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else
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# enable_starttls_auto: not provided
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# enable_starttls: when provided then false
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# use :auto when neither enable_starttls* provided
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setting_provided?(:enable_starttls) ? false : :auto
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end
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end
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def smtp_tls?
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(setting_provided?(:tls) && settings[:tls]) || (setting_provided?(:ssl) && settings[:ssl])
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end
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def start_smtp_session(&block)
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build_smtp_session.start(settings[:domain], settings[:user_name], settings[:password],
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settings[:authentication], &block)
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end
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def build_smtp_session
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if smtp_tls? && (settings[:enable_starttls] || settings[:enable_starttls_auto])
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# rubocop:disable Layout/LineLength
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raise ArgumentError,
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":enable_starttls and :tls are mutually exclusive. Set :tls if you're on an SMTPS connection. Set :enable_starttls if you're on an SMTP connection and using STARTTLS for secure TLS upgrade."
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# rubocop:enable Layout/LineLength
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end
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Net::SMTP.new(settings[:address], settings[:port]).tap do |smtp|
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if smtp_tls?
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smtp.disable_starttls
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smtp.enable_tls(ssl_context)
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else
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smtp.disable_tls
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case smtp_starttls
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when :always
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smtp.enable_starttls(ssl_context)
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when :auto
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smtp.enable_starttls_auto(ssl_context)
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else
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smtp.disable_starttls
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end
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end
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smtp.open_timeout = settings[:open_timeout] if settings[:open_timeout]
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smtp.read_timeout = settings[:read_timeout] if settings[:read_timeout]
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end
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end
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end
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end
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