From 90fbe4af03e9063cb29a1d026d18fefd6c767c7d Mon Sep 17 00:00:00 2001
From: Nicolas Williams <nico@twosigma.com>
Date: Thu, 21 May 2015 14:05:31 -0500
Subject: [PATCH 1/4] CVE-2022-42898 source4/heimdal: Add bswap64()

BUG: https://bugzilla.samba.org/show_bug.cgi?id=15203

[jsutton@samba.org backported from Heimdal commit
 0271b171e5331f0f562319b887f5f0b058ecc9b4; removed changes to
 cf/roken-frag.m4 that we don't have]
---
 source4/heimdal/lib/roken/bswap.c            | 17 +++++++++++++++++
 source4/heimdal/lib/roken/roken.h.in         |  5 +++++
 source4/heimdal/lib/roken/version-script.map |  1 +
 3 files changed, 23 insertions(+)

diff --git a/source4/heimdal/lib/roken/bswap.c b/source4/heimdal/lib/roken/bswap.c
index 7f8c1c22b1b..b0c4248da11 100644
--- a/source4/heimdal/lib/roken/bswap.c
+++ b/source4/heimdal/lib/roken/bswap.c
@@ -34,6 +34,23 @@
 #include <config.h>
 #include "roken.h"
 
+#ifndef HAVE_BSWAP64
+
+ROKEN_LIB_FUNCTION uint64_t ROKEN_LIB_CALL
+bswap64 (uint64_t val)
+{
+    return
+        (val & 0xffULL) << 56 |
+	(val & 0xff00ULL) << 40 |
+	(val & 0xff0000ULL) << 24 |
+	(val & 0xff000000ULL) << 8 |
+	(val & 0xff00000000ULL) >> 8 |
+	(val & 0xff0000000000ULL) >> 24 |
+	(val & 0xff000000000000ULL) >> 40 |
+	(val & 0xff00000000000000ULL) >> 56 ;
+}
+#endif
+
 #ifndef HAVE_BSWAP32
 
 ROKEN_LIB_FUNCTION unsigned int ROKEN_LIB_CALL
diff --git a/source4/heimdal/lib/roken/roken.h.in b/source4/heimdal/lib/roken/roken.h.in
index a6299aee8e5..13a5d943ba2 100644
--- a/source4/heimdal/lib/roken/roken.h.in
+++ b/source4/heimdal/lib/roken/roken.h.in
@@ -696,6 +696,11 @@ ROKEN_LIB_FUNCTION void ROKEN_LIB_CALL pidfile (const char*);
 #endif
 #endif
 
+#ifndef HAVE_BSWAP64
+#define bswap64 rk_bswap64
+ROKEN_LIB_FUNCTION uint64_t ROKEN_LIB_CALL bswap64(uint64_t);
+#endif
+
 #ifndef HAVE_BSWAP32
 #define bswap32 rk_bswap32
 ROKEN_LIB_FUNCTION unsigned int ROKEN_LIB_CALL bswap32(unsigned int);
diff --git a/source4/heimdal/lib/roken/version-script.map b/source4/heimdal/lib/roken/version-script.map
index 9229a373cd7..34b42a3639f 100644
--- a/source4/heimdal/lib/roken/version-script.map
+++ b/source4/heimdal/lib/roken/version-script.map
@@ -38,6 +38,7 @@ HEIMDAL_ROKEN_1.0 {
 		rk_asprintf;
 		rk_bswap16;
 		rk_bswap32;
+		rk_bswap64;
 		rk_cgetent;
 		rk_cgetstr;
 		rk_cloexec;
-- 
2.35.0

