diff --git a/pkgs/tools/security/hash_extender/default.nix b/pkgs/tools/security/hash_extender/default.nix
new file mode 100644
index 000000000000..0c5691a1e106
--- /dev/null
+++ b/pkgs/tools/security/hash_extender/default.nix
@@ -0,0 +1,27 @@
+{ stdenv, fetchFromGitHub, openssl }:
+
+stdenv.mkDerivation rec {
+  name = "hash_extender-${version}";
+  version = "2017-04-10";
+
+  src = fetchFromGitHub {
+    owner = "iagox86";
+    repo = "hash_extender";
+    rev = "d27581e062dd0b534074e11d7d311f65a6d7af21";
+    sha256 = "1npwbgqaynjh5x39halw43i116v89sxkpa1g1bbvc1lpi8hkhhcb";
+  };
+
+  buildInputs = [ openssl ];
+
+  installPhase = ''
+    mkdir -p $out/bin
+    cp hash_extender $out/bin
+  '';
+
+  meta = with stdenv.lib; {
+    description = "Tool to automate hash length extension attacks";
+    homepage = https://github.com/iagox86/hash_extender;
+    license = licenses.bsd3;
+    maintainers = with maintainers; [ geistesk ];
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 26093f1546ea..4d28631530ec 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -2699,6 +2699,8 @@ with pkgs;
 
   hashcat = callPackage ../tools/security/hashcat { };
 
+  hash_extender = callPackage ../tools/security/hash_extender { };
+
   hash-slinger = callPackage ../tools/security/hash-slinger { };
 
   hal-flash = callPackage ../os-specific/linux/hal-flash { };