Replaced system SQLite with SQLCipher to support encrypted database

Sources/DataLiteC/libtomcrypt/pk/x25519/x25519_export.c

@@ -0,0 +1,31 @@
+/* LibTomCrypt, modular cryptographic library -- Tom St Denis */
+/* SPDX-License-Identifier: Unlicense */
+#include "tomcrypt_private.h"
+
+/**
+  @file x25519_export.c
+  Export a X25519 key to a binary packet, Steffen Jaeckel
+*/
+
+#ifdef LTC_CURVE25519
+
+/**
+   Export a X25519 key to a binary packet
+   @param out    [out] The destination for the key
+   @param outlen [in/out] The max size and resulting size of the X25519 key
+   @param type   Which type of key (PK_PRIVATE, PK_PUBLIC|PK_STD or PK_PUBLIC)
+   @param key    The key you wish to export
+   @return CRYPT_OK if successful
+*/
+int x25519_export(      unsigned char *out, unsigned long *outlen,
+                                  int  which,
+                  const    curve25519_key *key)
+{
+   LTC_ARGCHK(key != NULL);
+
+   if (key->pka != LTC_PKA_X25519) return CRYPT_PK_INVALID_TYPE;
+
+   return ec25519_export(out, outlen, which, key);
+}
+
+#endif