function for writing ndef struct to yubikey

diff --git a/ykcore/ykcore.c b/ykcore/ykcore.c
index 1b813412b6b2c099200969d90b358d64b878d22e..eee3b375e213dbd8efd2b33aacccbfa393353a55 100644 (file)
--- a/ykcore/ykcore.c
+++ b/ykcore/ykcore.c
@@ -250,6 +250,45 @@ int yk_write_config(YK_KEY *yk, YK_CONFIG *cfg, int confnum,
        }
 }
 
+int yk_write_ndef(YK_KEY *yk, YKNDEF *ndef)
+{
+       unsigned char buf[sizeof(YKNDEF)];
+       YK_STATUS stat;
+       int seq;
+
+       /* Get current sequence # from status block */
+
+       if (!yk_get_status(yk, &stat))
+               return 0;
+
+       seq = stat.pgmSeq;
+
+       /* Insert config block in buffer */
+
+       memset(buf, 0, sizeof(buf));
+       memcpy(buf, ndef, sizeof(YKNDEF));
+
+       /* Write to Yubikey */
+       if (!yk_write_to_key(yk, SLOT_NDEF, buf, sizeof(buf)))
+               return 0;
+
+       /* When the Yubikey clears the SLOT_WRITE_FLAG, it has processed the last write.
+        * This wait can't be done in yk_write_to_key since some users of that function
+        * want to get the bytes in the status message, but when writing configuration
+        * we don't expect any data back.
+        */
+       yk_wait_for_key_status(yk, SLOT_NDEF, 0, WAIT_FOR_WRITE_FLAG, false, SLOT_WRITE_FLAG, NULL);
+
+       /* Verify update */
+
+       if (!yk_get_status(yk, &stat /*, 0*/))
+               return 0;
+
+       yk_errno = YK_EWRITEERR;
+       return stat.pgmSeq != seq;
+}
+
+
 int * const _yk_errno_location(void)
 {
        static int tsd_init = 0;