From f988b07805162835aa2476363d6eda8d5ae70331 Mon Sep 17 00:00:00 2001
From: jpfox156 <jpfox156@yahoo.com.au>
Date: Sun, 21 Aug 2022 22:08:51 +1000
Subject: [PATCH] FIX #1762 update switch_apr.c for openssl3

Low-level openssl api was deprecated in openssl3.0 leading to errors during compile.
Update switch_md5 method to use the openssl high-level api.
syntax plagiarized from:
https://stackoverflow.com/questions/69806220/advice-needed-for-migration-of-low-level-openssl-api-to-high-level-openssl-apis
---
 src/switch_apr.c | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

diff --git a/src/switch_apr.c b/src/switch_apr.c
index 91204acba7a..abf74157e44 100644
--- a/src/switch_apr.c
+++ b/src/switch_apr.c
@@ -1171,11 +1171,20 @@ SWITCH_DECLARE(switch_status_t) switch_md5(unsigned char digest[SWITCH_MD5_DIGES
 
 	return SWITCH_STATUS_SUCCESS;
 #elif defined(HAVE_LIBCRYPTO)
-	MD5_CTX md5_context;
+        EVP_MD_CTX *mdctx;
+        unsigned int digestLen = EVP_MD_size(EVP_md5());
+
+        // MD5_Init
+        mdctx = EVP_MD_CTX_new();
+        EVP_DigestInit_ex(mdctx, EVP_md5(), NULL);
+
+        // MD5_Update
+        EVP_DigestUpdate(mdctx, input, inputLen);
 
-	MD5_Init(&md5_context);
-	MD5_Update(&md5_context, input, inputLen);
-	MD5_Final(digest, &md5_context);
+        // MD5_Final
+        digest = (unsigned char *)OPENSSL_malloc(digestLen);
+        EVP_DigestFinal_ex(mdctx, digest, &digestLen);
+        EVP_MD_CTX_free(mdctx);
 
 	return SWITCH_STATUS_SUCCESS;
 #else