Replaced system SQLite with SQLCipher to support encrypted database

Sources/DataLiteC/libtomcrypt/pk/ecc/ecc_set_key.c

@@ -0,0 +1,56 @@
+/* LibTomCrypt, modular cryptographic library -- Tom St Denis */
+/* SPDX-License-Identifier: Unlicense */
+
+#include "tomcrypt_private.h"
+
+#ifdef LTC_MECC
+
+int ecc_set_key(const unsigned char *in, unsigned long inlen, int type, ecc_key *key)
+{
+   int err;
+   void *prime, *a, *b;
+
+   LTC_ARGCHK(key != NULL);
+   LTC_ARGCHK(in != NULL);
+   LTC_ARGCHK(inlen > 0);
+
+   prime = key->dp.prime;
+   a     = key->dp.A;
+   b     = key->dp.B;
+
+   if (type == PK_PRIVATE) {
+      /* load private key */
+      if ((err = ltc_mp_read_unsigned_bin(key->k, in, inlen)) != CRYPT_OK) {
+         goto error;
+      }
+      if (ltc_mp_iszero(key->k) || (ltc_mp_cmp(key->k, key->dp.order) != LTC_MP_LT)) {
+         err = CRYPT_INVALID_PACKET;
+         goto error;
+      }
+      /* compute public key */
+      if ((err = ltc_mp.ecc_ptmul(key->k, &key->dp.base, &key->pubkey, a, prime, 1)) != CRYPT_OK)         { goto error; }
+   }
+   else if (type == PK_PUBLIC) {
+      /* load public key */
+      if ((err = ltc_ecc_import_point(in, inlen, prime, a, b, key->pubkey.x, key->pubkey.y)) != CRYPT_OK) { goto error; }
+      if ((err = ltc_mp_set(key->pubkey.z, 1)) != CRYPT_OK)                                                   { goto error; }
+   }
+   else {
+      err = CRYPT_INVALID_PACKET;
+      goto error;
+   }
+
+   /* point on the curve + other checks */
+   if ((err = ltc_ecc_verify_key(key)) != CRYPT_OK) {
+      goto error;
+   }
+
+   key->type = type;
+   return CRYPT_OK;
+
+error:
+   ecc_free(key);
+   return err;
+}
+
+#endif