Replaced system SQLite with SQLCipher to support encrypted database

Sources/DataLiteC/libtomcrypt/misc/crypt/crypt_unregister_cipher.c

@@ -0,0 +1,33 @@
+/* LibTomCrypt, modular cryptographic library -- Tom St Denis */
+/* SPDX-License-Identifier: Unlicense */
+#include "tomcrypt_private.h"
+
+/**
+  @file crypt_unregister_cipher.c
+  Unregister a cipher, Tom St Denis
+*/
+
+/**
+  Unregister a cipher from the descriptor table
+  @param cipher   The cipher descriptor to remove
+  @return CRYPT_OK on success
+*/
+int unregister_cipher(const struct ltc_cipher_descriptor *cipher)
+{
+   int x;
+
+   LTC_ARGCHK(cipher != NULL);
+
+   /* is it already registered? */
+   LTC_MUTEX_LOCK(&ltc_cipher_mutex);
+   for (x = 0; x < TAB_SIZE; x++) {
+       if (XMEMCMP(&cipher_descriptor[x], cipher, sizeof(struct ltc_cipher_descriptor)) == 0) {
+          cipher_descriptor[x].name = NULL;
+          cipher_descriptor[x].ID   = 255;
+          LTC_MUTEX_UNLOCK(&ltc_cipher_mutex);
+          return CRYPT_OK;
+       }
+   }
+   LTC_MUTEX_UNLOCK(&ltc_cipher_mutex);
+   return CRYPT_ERROR;
+}