1 files changed, 53 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..85494bbc93
--- /dev/null
+++ b/lib/crypto/c_src/math.c
@@ -0,0 +1,53 @@
+/*
+ * %CopyrightBegin%
+ *
+ * Copyright Ericsson AB 2010-2018. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * %CopyrightEnd%
+ */
+
+#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;
+    size_t i;
+    ERL_NIF_TERM ret;
+
+    ASSERT(argc == 2);
+
+    if (!enif_inspect_iolist_as_binary(env, argv[0], &d1))
+        goto bad_arg;
+    if (!enif_inspect_iolist_as_binary(env, argv[1], &d2))
+        goto bad_arg;
+    if (d1.size != d2.size)
+        goto bad_arg;
+
+    if ((ret_ptr = enif_make_new_binary(env, d1.size, &ret)) == NULL)
+        goto err;
+
+    for (i=0; i<d1.size; i++) {
+	ret_ptr[i] = d1.data[i] ^ d2.data[i];
+    }
+
+    CONSUME_REDS(env,d1);
+    return ret;
+
+ bad_arg:
+ err:
+    return enif_make_badarg(env);
+}
+