Replaced system SQLite with SQLCipher to support encrypted database

Sources/DataLiteC/libtomcrypt/pk/ecc/ecc_import_x509.c

@@ -0,0 +1,54 @@
+/* LibTomCrypt, modular cryptographic library -- Tom St Denis */
+/* SPDX-License-Identifier: Unlicense */
+#include "tomcrypt_private.h"
+
+#if defined(LTC_MECC) && defined(LTC_DER)
+
+static int s_ecc_import_x509_with_oid(const unsigned char *in, unsigned long inlen, ecc_key *key)
+{
+   unsigned char bin_xy[2*ECC_MAXSIZE+2];
+   unsigned long curveoid[16];
+   unsigned long len_xy, len_oid;
+   int err;
+
+   len_xy = sizeof(bin_xy);
+   len_oid = 16;
+   err = x509_decode_subject_public_key_info(in, inlen, LTC_OID_EC, bin_xy, &len_xy,
+                                             LTC_ASN1_OBJECT_IDENTIFIER, (void *)curveoid, &len_oid);
+   if (err != CRYPT_OK) { goto error; }
+   err = ecc_import_with_oid(bin_xy, len_xy, curveoid, len_oid, PK_PUBLIC, key);
+error:
+   return err;
+}
+
+int ecc_import_subject_public_key_info(const unsigned char *in, unsigned long inlen, ecc_key *key)
+{
+   int err;
+
+   if ((err = s_ecc_import_x509_with_oid(in, inlen, key)) == CRYPT_OK) {
+      goto success;
+   }
+
+   err = ecc_import_with_curve(in, inlen, PK_PUBLIC, key);
+
+success:
+   return err;
+}
+
+/**
+  Import an ECC key from a X.509 certificate
+  @param in      The packet to import from
+  @param inlen   It's length (octets)
+  @param key     [out] Destination for newly imported key
+  @return CRYPT_OK if successful, upon error allocated memory is freed
+*/
+int ecc_import_x509(const unsigned char *in, unsigned long inlen, ecc_key *key)
+{
+   return x509_decode_public_key_from_certificate(in, inlen,
+                                                  LTC_OID_EC,
+                                                  LTC_ASN1_EOL, NULL, NULL,
+                                                  (public_key_decode_cb)ecc_import_subject_public_key_info, key);
+}
+
+#endif /* LTC_MECC */
+