Replaced system SQLite with SQLCipher to support encrypted database

Sources/DataLiteC/libtomcrypt/stream/chacha/chacha_keystream.c

@@ -0,0 +1,28 @@
+/* LibTomCrypt, modular cryptographic library -- Tom St Denis */
+/* SPDX-License-Identifier: Unlicense */
+
+/* The implementation is based on:
+ * chacha-ref.c version 20080118
+ * Public domain from D. J. Bernstein
+ */
+
+#include "tomcrypt_private.h"
+
+#ifdef LTC_CHACHA
+
+/**
+  Generate a stream of random bytes via ChaCha
+  @param st      The ChaCha20 state
+  @param out     [out] The output buffer
+  @param outlen  The output length
+  @return CRYPT_OK on success
+ */
+int chacha_keystream(chacha_state *st, unsigned char *out, unsigned long outlen)
+{
+   if (outlen == 0) return CRYPT_OK; /* nothing to do */
+   LTC_ARGCHK(out != NULL);
+   XMEMSET(out, 0, outlen);
+   return chacha_crypt(st, out, outlen, out);
+}
+
+#endif