Hook-up endianness & sizeof(long) detection code in SHA-1 implementat…

…ion (roehling#90)

This makes the SHA-1 implementation valid for big endian architectures
as well.

CMakeLists.txt

@@ -1,6 +1,8 @@
 cmake_minimum_required(VERSION 2.4)
 project(postsrsd C)
 include(CheckIncludeFile)
+include(CheckTypeSize)
+include(TestBigEndian)
 
 option(GENERATE_SRS_SECRET "Generate a random SRS secret if none exists during install" ON)
 option(USE_APPARMOR "Enable AppArmor profile" OFF)
@@ -56,6 +58,13 @@ if(HAVE_SYS_TYPES_H)
     add_definitions(-DHAVE_SYS_TYPES_H)
 endif()
 
+test_big_endian(WORDS_BIGENDIAN)
+if(WORDS_BIGENDIAN)
+    add_definitions(-DWORDS_BIGENDIAN)
+endif()
+check_type_size("unsigned long" SIZEOF_UNSIGNED_LONG)
+add_definitions(-DSIZEOF_UNSIGNED_LONG=${SIZEOF_UNSIGNED_LONG})
+
 if(NOT DEFINED INIT_FLAVOR)
     if(SYSTEMD)
         message(STATUS "Detected init flavor: systemd")

sha1.c

@@ -29,13 +29,22 @@
 #endif
 #endif
 
-#ifdef WORDS_BIGENDIAN
-#define BYTEORDER 0x4321
+#if SIZEOF_UNSIGNED_LONG == 4
+#  ifdef WORDS_BIGENDIAN
+#    define BYTEORDER 0x4321
+#  else
+#    define BYTEORDER 0x1234
+#  endif
+#elif SIZEOF_UNSIGNED_LONG == 8
+#  ifdef WORDS_BIGENDIAN
+#    define BYTEORDER 0x87654321
+#  else
+#    define BYTEORDER 0x12345678
+#  endif
 #else
-#define BYTEORDER 0x1234
+#  error "SHA1 requires an unsigned long of either 4 or 8 bytes"
 #endif
 
-
 /* UNRAVEL should be fastest & biggest */
 /* UNROLL_LOOPS should be just as big, but slightly slower */
 /* both undefined should be smallest and slowest */