File chdoom-prng.diff of Package chocolate-doom

From dcc41ce5c432a8641cdd278cc3ffb4eeb5fd5d8a Mon Sep 17 00:00:00 2001
From: Jan Engelhardt <jengelh@inai.de>
Date: Tue, 21 Apr 2015 09:28:15 +0200
Subject: [PATCH] build: avoid code breaking the aliasing regularly Upstream:
 no

Just use libcrypto already.

aes_prng.c: In function 'AES_SetKey':
aes_prng.c:693:9: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
          *((uint32_t*)tk[j]) = *((uint32_t*)k[j]);
---
 configure.ac    |    1 +
 src/Makefile.am |    6 +++---
 src/aes_prng.c  |   18 +++++++++---------
 3 files changed, 13 insertions(+), 12 deletions(-)

Index: chocolate-doom-2.1.0/configure.ac
===================================================================
--- chocolate-doom-2.1.0.orig/configure.ac
+++ chocolate-doom-2.1.0/configure.ac
@@ -55,6 +55,7 @@ LDFLAGS="$LDFLAGS $SDL_LIBS"
 
 AC_SDL_MAIN_WORKAROUND([
 
+    PKG_CHECK_MODULES([crypto], [libcrypto >= 0.9.7])
     # Check for SDL_mixer.
 
     AC_CHECK_LIB(SDL_mixer,Mix_LoadMUS,[
Index: chocolate-doom-2.1.0/src/Makefile.am
===================================================================
--- chocolate-doom-2.1.0.orig/src/Makefile.am
+++ chocolate-doom-2.1.0/src/Makefile.am
@@ -18,10 +18,10 @@ SETUP_BINARIES = @PROGRAM_PREFIX@doom-se
 
 execgames_SCRIPTS = $(SETUP_BINARIES)
 
-AM_CFLAGS = -I$(top_builddir)/textscreen            \
+AM_CPPFLAGS = -I$(top_builddir)/textscreen            \
             -I$(top_builddir)/opl                   \
             -I$(top_builddir)/pcsound               \
-            @SDLMIXER_CFLAGS@ @SDLNET_CFLAGS@
+            @SDLMIXER_CFLAGS@ @SDLNET_CFLAGS@ ${crypto_CFLAGS}
 
 # Common source files used by absolutely everything:
 
@@ -150,7 +150,7 @@ EXTRA_LIBS =
                @LDFLAGS@                                   \
                @SDL_LIBS@                                  \
                @SDLMIXER_LIBS@                             \
-               @SDLNET_LIBS@
+               @SDLNET_LIBS@ ${crypto_LIBS}
 
 if HAVE_WINDRES
 @PROGRAM_PREFIX@doom_SOURCES=$(SOURCE_FILES_WITH_DEH) resource.rc
Index: chocolate-doom-2.1.0/src/aes_prng.c
===================================================================
--- chocolate-doom-2.1.0.orig/src/aes_prng.c
+++ chocolate-doom-2.1.0/src/aes_prng.c
@@ -64,7 +64,9 @@
 #include "aes_prng.h"
 #include "doomtype.h"
 #include "i_system.h"
+#include <openssl/rand.h>
 
+#ifdef AESPRNG
 #define MAXKC			(256/32)
 #define MAXROUNDS		14
 
@@ -929,10 +931,11 @@ static char *AES_SelfTest(void)
 
     return NULL;
 }
+#endif /* AESPRNG */
 
 #ifndef TEST
-
 static boolean prng_enabled = false;
+#ifdef AESPRNG
 static RIJNDAEL_context prng_context;
 static uint32_t prng_input_counter;
 static uint32_t prng_values[4];
@@ -992,6 +995,7 @@ static void PRNG_Generate(void)
 
     prng_value_index = 0;
 }
+#endif /* AESPRNG */
 
 // Read a random 32-bit integer from the PRNG.
 
@@ -1004,14 +1008,7 @@ unsigned int PRNG_Random(void)
         return 0;
     }
 
-    if (prng_value_index >= 4)
-    {
-        PRNG_Generate();
-    }
-
-    result = prng_values[prng_value_index];
-    ++prng_value_index;
-
+    RAND_pseudo_bytes((unsigned char *)&result, sizeof(result));
     return result;
 }
 
@@ -1020,6 +1017,7 @@ unsigned int PRNG_Random(void)
 
 int main(int argc, char *argv[])
 {
+#ifdef AESPRNG
     char *errormsg;
 
     errormsg = AES_SelfTest();
@@ -1034,6 +1032,8 @@ int main(int argc, char *argv[])
         fprintf(stderr, "AES self test failed: %s\n", errormsg);
         return 1;
     }
+#endif
+    return 0;
 }
 
 #endif