From 2c88eff31da391d25aa44006a0324369103049f4 Mon Sep 17 00:00:00 2001
From: adfoster-r7 <alandavid_foster@rapid7.com>
Date: Thu, 21 Jul 2022 21:22:09 +0100
Subject: [PATCH] Add support for openssl3 with travis

---
 lib/openssl/cmac.rb | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/openssl/cmac.rb b/lib/openssl/cmac.rb
index d9f7240..c9f6e73 100644
--- a/lib/openssl/cmac.rb
+++ b/lib/openssl/cmac.rb
@@ -126,6 +126,7 @@ def reset
       @keys.clear
       @buffer.clear
       @cipher.reset unless @keys[0].nil?
+      @cipher.iv = "\x00" * 16
       @cipher.encrypt
       self
     end
@@ -160,6 +161,7 @@ def digest(length = 16)
       @cipher.reset
       @cipher.encrypt
       @cipher.key = @keys[0]
+      @cipher.iv = "\x00" * 16
       # Each block is 16-bytes and the last block will always be PKCS#7 padding
       # which we want to discard.  Take the last block prior to the padding for
       # the MAC.