Replaced system SQLite with SQLCipher to support encrypted database

2025-06-07 18:11:17 +03:00
parent f4198d62a7
commit 177d74700f
534 changed files with 362771 additions and 21 deletions
--- a/Sources/DataLiteC/libtomcrypt/prngs/rng_make_prng.c
+++ b/Sources/DataLiteC/libtomcrypt/prngs/rng_make_prng.c
@@ -0,0 +1,81 @@
+/* LibTomCrypt, modular cryptographic library -- Tom St Denis */
+/* SPDX-License-Identifier: Unlicense */
+#include "tomcrypt_private.h"
+
+#ifdef LTC_RNG_MAKE_PRNG
+/**
+  @file rng_make_prng.c
+  portable way to get secure random bits to feed a PRNG  (Tom St Denis)
+*/
+
+/**
+  Create a PRNG from a RNG
+
+     In case you pass bits as '-1' the PRNG will be setup
+     as if the export/import functionality has been used,
+     but the imported data comes directly from the RNG.
+
+  @param bits     Number of bits of entropy desired (-1 or 64 ... 1024)
+  @param wprng    Index of which PRNG to setup
+  @param prng     [out] PRNG state to initialize
+  @param callback A pointer to a void function for when the RNG is slow, this can be NULL
+  @return CRYPT_OK if successful
+*/
+int rng_make_prng(int bits, int wprng, prng_state *prng,
+                  void (*callback)(void))
+{
+   unsigned char* buf;
+   unsigned long bytes;
+   int err;
+
+   LTC_ARGCHK(prng != NULL);
+
+   /* check parameter */
+   if ((err = prng_is_valid(wprng)) != CRYPT_OK) {
+      return err;
+   }
+
+   if (bits == -1) {
+      bytes = prng_descriptor[wprng].export_size;
+   } else if (bits < 64 || bits > 1024) {
+      return CRYPT_INVALID_PRNGSIZE;
+   } else {
+      bytes = (unsigned long)((bits+7)/8) * 2;
+   }
+
+   if ((err = prng_descriptor[wprng].start(prng)) != CRYPT_OK) {
+      return err;
+   }
+
+   buf = XMALLOC(bytes);
+   if (buf == NULL) {
+      return CRYPT_MEM;
+   }
+
+   if (rng_get_bytes(buf, bytes, callback) != bytes) {
+      err = CRYPT_ERROR_READPRNG;
+      goto LBL_ERR;
+   }
+
+   if (bits == -1) {
+      if ((err = prng_descriptor[wprng].pimport(buf, bytes, prng)) != CRYPT_OK) {
+         goto LBL_ERR;
+      }
+   } else {
+      if ((err = prng_descriptor[wprng].add_entropy(buf, bytes, prng)) != CRYPT_OK) {
+         goto LBL_ERR;
+      }
+   }
+   if ((err = prng_descriptor[wprng].ready(prng)) != CRYPT_OK) {
+      goto LBL_ERR;
+   }
+
+LBL_ERR:
+   #ifdef LTC_CLEAN_STACK
+   zeromem(buf, bytes);
+   #endif
+   XFREE(buf);
+   return err;
+}
+#endif /* #ifdef LTC_RNG_MAKE_PRNG */
+