File 0517-crypto-Set-flag-to-disable-EVP-for-DH-if-historic-cr.patch of Package erlang

From 1f53d97897e118744b00a64d540e9cbf91af1cee Mon Sep 17 00:00:00 2001
From: Hans Nilsson <hans@erlang.org>
Date: Tue, 1 Sep 2020 14:35:46 +0200
Subject: [PATCH] crypto: Set flag to disable EVP for DH if historic crypto
 libs

---
 lib/crypto/c_src/openssl_config.h | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/lib/crypto/c_src/openssl_config.h b/lib/crypto/c_src/openssl_config.h
index 5acec53996..ee9a99297b 100644
--- a/lib/crypto/c_src/openssl_config.h
+++ b/lib/crypto/c_src/openssl_config.h
@@ -108,6 +108,14 @@
 #ifndef HAS_LIBRESSL
 # if OPENSSL_VERSION_NUMBER >= PACKED_OPENSSL_VERSION_PLAIN(1,0,0)
 #  define HAS_EVP_PKEY_CTX
+#  if OPENSSL_VERSION_NUMBER < PACKED_OPENSSL_VERSION_PLAIN(1,0,2) \
+    && (! DISABLE_EVP_DH)
+     /* Diffie-Hellman EVP is slow on antique crypto libs
+      * DISABLE_EVP_DH is 0 or 1 from the configure script
+      */
+#    undef  DISABLE_EVP_DH
+#    define DISABLE_EVP_DH 1
+#  endif
 #  define HAVE_EVP_CIPHER_CTX_COPY
 # endif
 
-- 
2.26.2