Replaced system SQLite with SQLCipher to support encrypted database

Sources/DataLiteC/libtomcrypt/stream/salsa20/salsa20_keystream.c

@@ -0,0 +1,29 @@
+/* LibTomCrypt, modular cryptographic library -- Tom St Denis */
+/* SPDX-License-Identifier: Unlicense */
+
+/* The implementation is based on:
+ * "Salsa20 specification", http://cr.yp.to/snuffle/spec.pdf
+ * and salsa20-ref.c version 20051118
+ * Public domain from D. J. Bernstein
+ */
+
+#include "tomcrypt_private.h"
+
+#ifdef LTC_SALSA20
+
+/**
+  Generate a stream of random bytes via Salsa20
+  @param st      The Salsa20 state
+  @param out     [out] The output buffer
+  @param outlen  The output length
+  @return CRYPT_OK on success
+ */
+int salsa20_keystream(salsa20_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 salsa20_crypt(st, out, outlen, out);
+}
+
+#endif