1 files changed, 23 insertions, 0 deletions
diff --git a/lib/crypto/c_src/math.c b/lib/crypto/c_src/math.c
new file mode 100644
index 0000000000..ae0de56720
--- /dev/null
+++ b/lib/crypto/c_src/math.c
@@ -0,0 +1,23 @@
+#include "math.h"
+
+ERL_NIF_TERM do_exor(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
+{/* (Data1, Data2) */
+    ErlNifBinary d1, d2;
+    unsigned char* ret_ptr;
+    int i;
+    ERL_NIF_TERM ret;
+
+    if (!enif_inspect_iolist_as_binary(env,argv[0], &d1)
+	|| !enif_inspect_iolist_as_binary(env,argv[1], &d2)
+	|| d1.size != d2.size) {
+	return enif_make_badarg(env);
+    }
+    ret_ptr = enif_make_new_binary(env, d1.size, &ret);
+
+    for (i=0; i<d1.size; i++) {
+	ret_ptr[i] = d1.data[i] ^ d2.data[i];
+    }
+    CONSUME_REDS(env,d1);
+    return ret;
+}
+