Replaced system SQLite with SQLCipher to support encrypted database

Sources/DataLiteC/libtomcrypt/stream/rc4/rc4_stream_memory.c

@@ -0,0 +1,31 @@
+/* LibTomCrypt, modular cryptographic library -- Tom St Denis */
+/* SPDX-License-Identifier: Unlicense */
+
+#include "tomcrypt_private.h"
+
+#ifdef LTC_RC4_STREAM
+
+/**
+   Encrypt (or decrypt) bytes of ciphertext (or plaintext) with RC4
+   @param key     The key
+   @param keylen  The key length
+   @param datain  The plaintext (or ciphertext)
+   @param datalen The length of the input and output (octets)
+   @param dataout [out] The ciphertext (or plaintext)
+   @return CRYPT_OK if successful
+*/
+int rc4_stream_memory(const unsigned char *key,    unsigned long keylen,
+                      const unsigned char *datain, unsigned long datalen,
+                      unsigned char *dataout)
+{
+   rc4_state st;
+   int err;
+
+   if ((err = rc4_stream_setup(&st, key, keylen)) != CRYPT_OK) goto WIPE_KEY;
+   err = rc4_stream_crypt(&st, datain, datalen, dataout);
+WIPE_KEY:
+   rc4_stream_done(&st);
+   return err;
+}
+
+#endif /* LTC_RC4_STREAM */