From 35890573a59b72293977841f74ef998c8d77bd20 Mon Sep 17 00:00:00 2001
From: Zach van Rijn <me@zv.io>
Date: Tue, 19 Apr 2022 15:41:37 +0000
Subject: system/zlib: bump { 1.2.11 --> 1.2.12 }. fixes #527, #528, #529.
 become maintainer.

---
 system/zlib/APKBUILD                       | 15 ++++++---
 system/zlib/fix-configure-issue.patch      | 24 ++++++++++++++
 system/zlib/keep-legacy-crc-behavior.patch | 51 ++++++++++++++++++++++++++++++
 3 files changed, 85 insertions(+), 5 deletions(-)
 create mode 100644 system/zlib/fix-configure-issue.patch
 create mode 100644 system/zlib/keep-legacy-crc-behavior.patch

diff --git a/system/zlib/APKBUILD b/system/zlib/APKBUILD
index 42233e86f..39490a78b 100644
--- a/system/zlib/APKBUILD
+++ b/system/zlib/APKBUILD
@@ -1,7 +1,7 @@
-# Maintainer: 
+# Maintainer: Zach van Rijn <me@zv.io>
 pkgname=zlib
-pkgver=1.2.11
-pkgrel=1
+pkgver=1.2.12
+pkgrel=0
 pkgdesc="A compression/decompression Library"
 arch="all"
 license="Zlib"
@@ -9,7 +9,10 @@ url="https://zlib.net"
 depends=""
 makedepends=""
 subpackages="$pkgname-dev $pkgname-doc"
-source="https://zlib.net/$pkgname-$pkgver.tar.gz"
+source="https://zlib.net/$pkgname-$pkgver.tar.gz
+	fix-configure-issue.patch
+	keep-legacy-crc-behavior.patch
+	"
 
 build() {
 	CHOST="${CHOST}" ./configure \
@@ -29,4 +32,6 @@ package() {
 		DESTDIR="$pkgdir"
 }
 
-sha512sums="73fd3fff4adeccd4894084c15ddac89890cd10ef105dd5e1835e1e9bbb6a49ff229713bd197d203edfa17c2727700fce65a2a235f07568212d820dca88b528ae  zlib-1.2.11.tar.gz"
+sha512sums="cc2366fa45d5dfee1f983c8c51515e0cff959b61471e2e8d24350dea22d3f6fcc50723615a911b046ffc95f51ba337d39ae402131a55e6d1541d3b095d6c0a14  zlib-1.2.12.tar.gz
+078f85be91fa0051d50950148894356a4a3e179aea78163499f929c4f4f1d7b87087d082af4ba2f6fd7eb2574f3ec4082a32f8877a863ca20673717cb66e9f4d  fix-configure-issue.patch
+38f0593a0bc17336d31191b7af684e31ec2eb34bd3add49bcb1f95c5e2bfb4405ffc341c2650d52c4fbf417ab4f80a0cc82fb868c9816b04d25210ae29a71f2c  keep-legacy-crc-behavior.patch"
diff --git a/system/zlib/fix-configure-issue.patch b/system/zlib/fix-configure-issue.patch
new file mode 100644
index 000000000..0136071ea
--- /dev/null
+++ b/system/zlib/fix-configure-issue.patch
@@ -0,0 +1,24 @@
+From 05796d3d8d5546cf1b4dfe2cd72ab746afae505d Mon Sep 17 00:00:00 2001
+From: Mark Adler <madler@alumni.caltech.edu>
+Date: Mon, 28 Mar 2022 18:34:10 -0700
+Subject: [PATCH] Fix configure issue that discarded provided CC definition.
+
+---
+ configure | 3 +++
+ 1 file changed, 3 insertions(+)
+
+diff --git a/configure b/configure
+index 52ff4a04e..3fa3e8618 100755
+--- a/configure
++++ b/configure
+@@ -174,7 +174,10 @@ if test -z "$CC"; then
+   else
+     cc=${CROSS_PREFIX}cc
+   fi
++else
++  cc=${CC}
+ fi
++
+ cflags=${CFLAGS-"-O3"}
+ # to force the asm version use: CFLAGS="-O3 -DASMV" ./configure
+ case "$cc" in
diff --git a/system/zlib/keep-legacy-crc-behavior.patch b/system/zlib/keep-legacy-crc-behavior.patch
new file mode 100644
index 000000000..85a6a7e3a
--- /dev/null
+++ b/system/zlib/keep-legacy-crc-behavior.patch
@@ -0,0 +1,51 @@
+From ec3df00224d4b396e2ac6586ab5d25f673caa4c2 Mon Sep 17 00:00:00 2001
+From: Mark Adler <madler@alumni.caltech.edu>
+Date: Wed, 30 Mar 2022 11:14:53 -0700
+Subject: [PATCH] Correct incorrect inputs provided to the CRC functions.
+
+The previous releases of zlib were not sensitive to incorrect CRC
+inputs with bits set above the low 32. This commit restores that
+behavior, so that applications with such bugs will continue to
+operate as before.
+---
+ crc32.c | 8 ++++----
+ 1 file changed, 4 insertions(+), 4 deletions(-)
+
+diff --git a/crc32.c b/crc32.c
+index a1bdce5c2..451887bc7 100644
+--- a/crc32.c
++++ b/crc32.c
+@@ -630,7 +630,7 @@ unsigned long ZEXPORT crc32_z(crc, buf, len)
+ #endif /* DYNAMIC_CRC_TABLE */
+ 
+     /* Pre-condition the CRC */
+-    crc ^= 0xffffffff;
++    crc = (~crc) & 0xffffffff;
+ 
+     /* Compute the CRC up to a word boundary. */
+     while (len && ((z_size_t)buf & 7) != 0) {
+@@ -749,7 +749,7 @@ unsigned long ZEXPORT crc32_z(crc, buf, len)
+ #endif /* DYNAMIC_CRC_TABLE */
+ 
+     /* Pre-condition the CRC */
+-    crc ^= 0xffffffff;
++    crc = (~crc) & 0xffffffff;
+ 
+ #ifdef W
+ 
+@@ -1077,7 +1077,7 @@ uLong ZEXPORT crc32_combine64(crc1, crc2, len2)
+ #ifdef DYNAMIC_CRC_TABLE
+     once(&made, make_crc_table);
+ #endif /* DYNAMIC_CRC_TABLE */
+-    return multmodp(x2nmodp(len2, 3), crc1) ^ crc2;
++    return multmodp(x2nmodp(len2, 3), crc1) ^ (crc2 & 0xffffffff);
+ }
+ 
+ /* ========================================================================= */
+@@ -1112,5 +1112,5 @@ uLong crc32_combine_op(crc1, crc2, op)
+     uLong crc2;
+     uLong op;
+ {
+-    return multmodp(op, crc1) ^ crc2;
++    return multmodp(op, crc1) ^ (crc2 & 0xffffffff);
+ }
-- 
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