From 619f09be066777b8296acf93bd6b51771ca64bd2 Mon Sep 17 00:00:00 2001
From: Patrick McDermott <patrick.mcdermott@libiquity.com>
Date: Tue, 02 May 2023 22:22:29 -0400
Subject: ustar: Treat octets as unsigned in chksum

Per POSIX.
---
diff --git a/src/ustar.c b/src/ustar.c
index 8c31f7a..d70a616 100644
--- a/src/ustar.c
+++ b/src/ustar.c
@@ -271,9 +271,9 @@ opkg_opk_ustar_write_header(struct opkg_opk_ustar *ustar,
 		uid_t uid, const char *uname, gid_t gid, const char *gname,
 		uint64_t size, int64_t mtime, char type, const char *linkname)
 {
-	uint32_t  chksum;
-	size_t    i;
-	char     *header_uc;
+	uint32_t       chksum;
+	size_t         i;
+	unsigned char *header_uc;
 
 	memset(&ustar->header, 0, sizeof(ustar->header));
 
@@ -322,7 +322,7 @@ opkg_opk_ustar_write_header(struct opkg_opk_ustar *ustar,
 	for (i = 0; i < sizeof(ustar->header.chksum); ++i) {
 		ustar->header.chksum[i] = ' ';
 	}
-	header_uc = (char *) &ustar->header;
+	header_uc = (unsigned char *) &ustar->header;
 	for (i = 0; i < OPKG_OPK_USTAR_RECORD_SIZE; ++i) {
 		chksum += header_uc[i];
 	}
--
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