Replaced system SQLite with SQLCipher to support encrypted database

Sources/DataLiteC/libtomcrypt/pk/pka_key.c

@@ -0,0 +1,45 @@
+/* LibTomCrypt, modular cryptographic library -- Tom St Denis */
+/* SPDX-License-Identifier: Unlicense */
+#include "tomcrypt_private.h"
+
+void pka_key_destroy(ltc_pka_key **key)
+{
+   LTC_ARGCHKVD(key != NULL);
+
+   if (!*key)
+      return;
+
+   pka_key_free(*key);
+   zeromem(*key, sizeof(**key));
+   XFREE(*key);
+   *key = NULL;
+}
+
+void pka_key_free(ltc_pka_key *key)
+{
+   LTC_ARGCHKVD(key != NULL);
+   switch (key->id) {
+      case LTC_PKA_DH:
+#if defined(LTC_MDH)
+         dh_free(&key->u.dh);
+#endif
+         break;
+      case LTC_PKA_DSA:
+#if defined(LTC_MDSA)
+         dsa_free(&key->u.dsa);
+#endif
+         break;
+      case LTC_PKA_RSA:
+#if defined(LTC_MRSA)
+         rsa_free(&key->u.rsa);
+#endif
+         break;
+      case LTC_PKA_EC:
+#if defined(LTC_MECC)
+         ecc_free(&key->u.ecc);
+#endif
+         break;
+      default:
+         break;
+   }
+}