From b2c9543ea94bbfd00480ab6e89e31813f4320e13 Mon Sep 17 00:00:00 2001
From: Allan McRae <allan@archlinux.org>
Date: Mon, 7 Nov 2022 16:58:29 +1000
Subject: [PATCH] Use modern openssl interfaces for calculating MD5 and SHA256
 checksum

The currently used openssl interfaces for calculating checksums have been
deprecated in openssl-3.0.  Move to the modern interfaces to avoid build
warnings.

Signed-off-by: Allan McRae <allan@archlinux.org>
---
 lib/libalpm/util.c | 25 +++++++++++++++----------
 1 file changed, 15 insertions(+), 10 deletions(-)

diff --git a/lib/libalpm/util.c b/lib/libalpm/util.c
index 6e12f622..3c551473 100644
--- a/lib/libalpm/util.c
+++ b/lib/libalpm/util.c
@@ -40,8 +40,7 @@
 #include <archive_entry.h>
 
 #ifdef HAVE_LIBSSL
-#include <openssl/md5.h>
-#include <openssl/sha.h>
+#include <openssl/evp.h>
 #endif
 
 #ifdef HAVE_LIBNETTLE
@@ -923,7 +922,8 @@ const char *_alpm_filecache_setup(alpm_handle_t *handle)
 static int md5_file(const char *path, unsigned char output[16])
 {
 #if HAVE_LIBSSL
-	MD5_CTX ctx;
+	EVP_MD_CTX *ctx;
+	const EVP_MD *md = EVP_get_digestbyname("MD5");
 #else /* HAVE_LIBNETTLE */
 	struct md5_ctx ctx;
 #endif
@@ -940,7 +940,8 @@ static int md5_file(const char *path, unsigned char output[16])
 	}
 
 #if HAVE_LIBSSL
-	MD5_Init(&ctx);
+	ctx = EVP_MD_CTX_create();
+	EVP_DigestInit_ex(ctx, md, NULL);
 #else /* HAVE_LIBNETTLE */
 	md5_init(&ctx);
 #endif
@@ -950,7 +951,7 @@ static int md5_file(const char *path, unsigned char output[16])
 			continue;
 		}
 #if HAVE_LIBSSL
-		MD5_Update(&ctx, buf, n);
+		EVP_DigestUpdate(ctx, buf, n);
 #else /* HAVE_LIBNETTLE */
 		md5_update(&ctx, n, buf);
 #endif
@@ -964,7 +965,8 @@ static int md5_file(const char *path, unsigned char output[16])
 	}
 
 #if HAVE_LIBSSL
-	MD5_Final(output, &ctx);
+	EVP_DigestFinal_ex(ctx, output, NULL);
+	EVP_MD_CTX_destroy(ctx);
 #else /* HAVE_LIBNETTLE */
 	md5_digest(&ctx, MD5_DIGEST_SIZE, output);
 #endif
@@ -979,7 +981,8 @@ static int md5_file(const char *path, unsigned char output[16])
 static int sha256_file(const char *path, unsigned char output[32])
 {
 #if HAVE_LIBSSL
-	SHA256_CTX ctx;
+	EVP_MD_CTX *ctx;
+	const EVP_MD *md = EVP_get_digestbyname("SHA256");
 #else /* HAVE_LIBNETTLE */
 	struct sha256_ctx ctx;
 #endif
@@ -996,7 +999,8 @@ static int sha256_file(const char *path, unsigned char output[32])
 	}
 
 #if HAVE_LIBSSL
-	SHA256_Init(&ctx);
+	ctx = EVP_MD_CTX_create();
+	EVP_DigestInit_ex(ctx, md, NULL);
 #else /* HAVE_LIBNETTLE */
 	sha256_init(&ctx);
 #endif
@@ -1006,7 +1010,7 @@ static int sha256_file(const char *path, unsigned char output[32])
 			continue;
 		}
 #if HAVE_LIBSSL
-		SHA256_Update(&ctx, buf, n);
+		EVP_DigestUpdate(ctx, buf, n);
 #else /* HAVE_LIBNETTLE */
 		sha256_update(&ctx, n, buf);
 #endif
@@ -1020,7 +1024,8 @@ static int sha256_file(const char *path, unsigned char output[32])
 	}
 
 #if HAVE_LIBSSL
-	SHA256_Final(output, &ctx);
+	EVP_DigestFinal_ex(ctx, output, NULL);
+	EVP_MD_CTX_destroy(ctx);
 #else /* HAVE_LIBNETTLE */
 	sha256_digest(&ctx, SHA256_DIGEST_SIZE, output);
 #endif