1 files changed, 0 insertions, 51 deletions
diff --git a/lib/api/integrations/slack/request.rb b/lib/api/integrations/slack/request.rb
deleted file mode 100644
index df0109b07aa..00000000000
--- a/lib/api/integrations/slack/request.rb
+++ /dev/null
@@ -1,51 +0,0 @@
-# frozen_string_literal: true
-
-module API
-  class Integrations
-    module Slack
-      module Request
-        VERIFICATION_VERSION = 'v0'
-        VERIFICATION_TIMESTAMP_HEADER = 'X-Slack-Request-Timestamp'
-        VERIFICATION_SIGNATURE_HEADER = 'X-Slack-Signature'
-        VERIFICATION_DELIMITER = ':'
-        VERIFICATION_HMAC_ALGORITHM = 'sha256'
-        VERIFICATION_TIMESTAMP_EXPIRY = 1.minute.to_i
-
-        # Verify the request by comparing the given request signature in the header
-        # with a signature value that we compute according to the steps in:
-        # https://api.slack.com/authentication/verifying-requests-from-slack.
-        def self.verify!(request)
-          return false unless Gitlab::CurrentSettings.slack_app_signing_secret
-
-          timestamp, signature = request.headers.values_at(
-            VERIFICATION_TIMESTAMP_HEADER,
-            VERIFICATION_SIGNATURE_HEADER
-          )
-
-          return false if timestamp.nil? || signature.nil?
-          return false if Time.current.to_i - timestamp.to_i >= VERIFICATION_TIMESTAMP_EXPIRY
-
-          request.body.rewind
-
-          basestring = [
-            VERIFICATION_VERSION,
-            timestamp,
-            request.body.read
-          ].join(VERIFICATION_DELIMITER)
-
-          hmac_digest = OpenSSL::HMAC.hexdigest(
-            VERIFICATION_HMAC_ALGORITHM,
-            Gitlab::CurrentSettings.slack_app_signing_secret,
-            basestring
-          )
-
-          # Signature will look like: 'v0=a2114d57b48eac39b9ad189dd8316235a7b4a8d21a10bd27519666489c69b503'
-          ActiveSupport::SecurityUtils.secure_compare(
-            signature,
-            "#{VERIFICATION_VERSION}=#{hmac_digest}"
-          )
-        end
-      end
-    end
-  end
-end