Replaced system SQLite with SQLCipher to support encrypted database

Sources/DataLiteC/libtomcrypt/stream/salsa20/xsalsa20_memory.c

@@ -0,0 +1,40 @@
+/* LibTomCrypt, modular cryptographic library -- Tom St Denis */
+/* SPDX-License-Identifier: Unlicense */
+
+#include "tomcrypt_private.h"
+
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wconversion"
+#pragma clang diagnostic ignored "-Wshorten-64-to-32"
+
+#ifdef LTC_XSALSA20
+
+/**
+   Encrypt (or decrypt) bytes of ciphertext (or plaintext) with XSalsa20
+   @param key      The key
+   @param keylen   The key length
+   @param nonce    The initial vector
+   @param noncelen The initial vector length
+   @param datain   The plaintext (or ciphertext)
+   @param datalen  The length of the input and output (octets)
+   @param rounds   The number of rounds
+   @param dataout  [out] The ciphertext (or plaintext)
+   @return CRYPT_OK if successful
+*/
+int xsalsa20_memory(const unsigned char *key,    unsigned long keylen,   unsigned long rounds,
+                    const unsigned char *nonce,  unsigned long noncelen,
+                    const unsigned char *datain, unsigned long datalen,  unsigned char *dataout)
+{
+   salsa20_state st;
+   int err;
+
+   if ((err = xsalsa20_setup(&st, key, keylen, nonce, noncelen, rounds)) != CRYPT_OK) goto WIPE_KEY;
+   err = salsa20_crypt(&st, datain, datalen, dataout);
+WIPE_KEY:
+   salsa20_done(&st);
+   return err;
+}
+
+#endif /* LTC_XSALSA20 */
+
+#pragma clang diagnostic pop