From f9a31522df33d35c0cf21754b0b0a454f6fd6601 Mon Sep 17 00:00:00 2001
From: Nick Cao <nickcao@nichi.co>
Date: Sun, 18 Sep 2022 16:23:47 +0800
Subject: [PATCH] clevis: fix build with openssl_3

---
 pkgs/tools/security/clevis/default.nix | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/pkgs/tools/security/clevis/default.nix b/pkgs/tools/security/clevis/default.nix
index 6cfd1034785..70767373258 100644
--- a/pkgs/tools/security/clevis/default.nix
+++ b/pkgs/tools/security/clevis/default.nix
@@ -1,6 +1,7 @@
 { lib
 , stdenv
 , fetchFromGitHub
+, fetchurl
 , meson
 , ninja
 , pkg-config
@@ -29,6 +30,14 @@ stdenv.mkDerivation rec {
     sha256 = "sha256-m1UhyjD5ydSgCTBu6sECLlxFx0rnQxFnBA7frbdUqU8=";
   };
 
+  patches = [
+    # sss: use BN_set_word(x, 0) instead of BN_zero(), fixes build issue with different versions of openssl
+    (fetchurl {
+      url = "https://github.com/latchset/clevis/commit/ee1dfedb9baca107e66a0fec76693c9d479dcfd9.patch";
+      sha256 = "sha256-GeklrWWlAMALDLdnn6+0Bi0l+bXrIbYkgIyI94WEybM=";
+    })
+  ];
+
   postPatch = ''
     for f in $(find src/ -type f); do
       grep -q "/bin/cat" "$f" && substituteInPlace "$f" \