sha256: avoid functions deprecated in OpenSSL 3+

OpenSSL 3+ deprecates the SHA256_Init, SHA256_Update, and SHA256_Final
functions, leading to errors when building with `DEVELOPER=1'.

Use the newer EVP_* API with OpenSSL 3+ despite being more
error-prone and less efficient due to heap allocations.

Signed-off-by: Eric Wong <e@80x24.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 5 insertions, 1 deletions

diff --git a/hash-ll.h b/hash-ll.h
index 8050925137..5173a2698c 100644
--- a/hash-ll.h
+++ b/hash-ll.h
@@ -17,7 +17,11 @@
 #define SHA256_NEEDS_CLONE_HELPER
 #include "sha256/gcrypt.h"
 #elif defined(SHA256_OPENSSL)
-#include <openssl/sha.h>
+#  include <openssl/sha.h>
+#  if defined(OPENSSL_API_LEVEL) && OPENSSL_API_LEVEL >= 3
+#    define SHA256_NEEDS_CLONE_HELPER
+#    include "sha256/openssl.h"
+#  endif
 #else
 #include "sha256/block/sha256.h"
 #endif