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diff --git a/libtomcrypt/src/modes/xts/xts_init.c b/libtomcrypt/src/modes/xts/xts_init.c
new file mode 100644
index 0000000..be0ac6a
--- /dev/null
+++ b/libtomcrypt/src/modes/xts/xts_init.c
@@ -0,0 +1,61 @@
+/* LibTomCrypt, modular cryptographic library -- Tom St Denis
+ *
+ * LibTomCrypt is a library that provides various cryptographic
+ * algorithms in a highly modular and flexible manner.
+ *
+ * The library is free for all purposes without any express
+ * guarantee it works.
+ */
+#include "tomcrypt.h"
+
+/**
+  Source donated by Elliptic Semiconductor Inc (www.ellipticsemi.com) to the LibTom Projects
+*/
+
+#ifdef LTC_XTS_MODE
+
+/** Start XTS mode
+   @param cipher      The index of the cipher to use
+   @param key1        The encrypt key
+   @param key2        The tweak encrypt key
+   @param keylen      The length of the keys (each) in octets
+   @param num_rounds  The number of rounds for the cipher (0 == default)
+   @param xts         [out] XTS structure
+   Returns CRYPT_OK upon success.
+*/
+int xts_start(int cipher, const unsigned char *key1, const unsigned char *key2, unsigned long keylen, int num_rounds,
+              symmetric_xts *xts)
+{
+   int err;
+
+   /* check inputs */
+   LTC_ARGCHK(key1 != NULL);
+   LTC_ARGCHK(key2 != NULL);
+   LTC_ARGCHK(xts != NULL);
+
+   /* check if valid */
+   if ((err = cipher_is_valid(cipher)) != CRYPT_OK) {
+      return err;
+   }
+
+   if (cipher_descriptor[cipher].block_length != 16) {
+      return CRYPT_INVALID_ARG;
+   }
+
+   /* schedule the two ciphers */
+   if ((err = cipher_descriptor[cipher].setup(key1, keylen, num_rounds, &xts->key1)) != CRYPT_OK) {
+      return err;
+   }
+   if ((err = cipher_descriptor[cipher].setup(key2, keylen, num_rounds, &xts->key2)) != CRYPT_OK) {
+      return err;
+   }
+   xts->cipher = cipher;
+
+   return err;
+}
+
+#endif
+
+/* ref:         $Format:%D$ */
+/* git commit:  $Format:%H$ */
+/* commit time: $Format:%ai$ */