john: add OpenCL support

pkgs/tools/security/john/default.nix

@@ -14,6 +14,10 @@
  python3Packages,
  perl,
  perlPackages,
+ withOpenCL ? true,
+ opencl-headers,
+ ocl-icd,
+ substituteAll,
  makeWrapper,
 }:
 
@@ -28,6 +32,13 @@ stdenv.mkDerivation rec {
  hash = "sha256-zvoN+8Sx6qpVg2JeRLOIH1ehfl3tFTv7r5wQZ44Qsbc=";
  };
 
+ patches = lib.optionals withOpenCL [
+ (substituteAll {
+ src = ./opencl.patch;
+ ocl_icd = ocl-icd;
+ })
+ ];
+
  postPatch = ''
  sed -ri -e '
  s!^(#define\s+CFG_[A-Z]+_NAME\s+).*/!\1"'"$out"'/etc/john/!
@@ -39,28 +50,37 @@ stdenv.mkDerivation rec {
  }' run/*.conf
  '';
 
- preConfigure = ''
- cd src
- # Makefile.in depends on AS and LD being set to CC, which is set by default in configure.ac.
- # This ensures we override the environment variables set in cc-wrapper/setup-hook.sh
- export AS=$CC
- export LD=$CC
- '';
+ preConfigure =
+ ''
+ cd src
+ # Makefile.in depends on AS and LD being set to CC, which is set by default in configure.ac.
+ # This ensures we override the environment variables set in cc-wrapper/setup-hook.sh
+ export AS=$CC
+ export LD=$CC
+ ''
+ + lib.optionalString withOpenCL ''
+ python ./opencl_generate_dynamic_loader.py # Update opencl_dynamic_loader.c
+ '';
  configureFlags = [
  "--disable-native-tests"
  "--with-systemwide"
  ];
 
- buildInputs = [
- openssl
- nss
- nspr
- libkrb5
- gmp
- zlib
- libpcap
- re2
- ];
+ buildInputs =
+ [
+ openssl
+ nss
+ nspr
+ libkrb5
+ gmp
+ zlib
+ libpcap
+ re2
+ ]
+ ++ lib.optionals withOpenCL [
+ opencl-headers
+ ocl-icd
+ ];
  nativeBuildInputs = [
  gcc
  python3Packages.wrapPython

pkgs/tools/security/john/opencl.patch

@@ -0,0 +1,18 @@
+diff --git a/src/opencl_generate_dynamic_loader.py b/src/opencl_generate_dynamic_loader.py
+index 790705330..2acedbc56 100755
+--- a/src/opencl_generate_dynamic_loader.py
++++ b/src/opencl_generate_dynamic_loader.py
+@@ -134,12 +134,7 @@ static void load_opencl_dll(void)
+
+ /* Names to try to load */
+ const char * const opencl_names[] = {
+- "libOpenCL.so", /* Linux/others, hack via "development" sub-package's symlink */
+- "OpenCL", /* _WIN */
+- "/System/Library/Frameworks/OpenCL.framework/OpenCL", /* __APPLE__ */
+- "opencl.dll", /* __CYGWIN__ */
+- "cygOpenCL-1.dll", /* __CYGWIN__ */
+- "libOpenCL.so.1" /* Linux/others, no "development" sub-package installed */
++ "@ocl_icd@/lib/libOpenCL.so" /* NixOS */
+ };
+
+ for (i = 0; i < sizeof(opencl_names)/sizeof(opencl_names[0]); i++) {