We have detected your current browser version is not the latest one. Xilinx.com uses the latest web technologies to bring you the best online experience possible. Please upgrade to a Xilinx.com supported browser:Chrome, Firefox, Internet Explorer 11, Safari. Thank you!

AR# 61258

Vivado 2014.x - Regenerate different key file for Encryption on Linux


In a 7 series Linux environment, the "BITSTREAM.ENCRYPTION.KEYFILE" property is not handled correctly.

The constraints used are as below:

set_property BITSTREAM.ENCRYPTION.ENCRYPT Yes [current_design]

The generate_bitstream log from Linux environment would be:

Reading key file /work/project_11/original_2.nky. BITSTREAM.ENCRYPTION.KEYFILE Path
Processing options...
Creating bitmap...
Creating bitstream...
Writing bitstream ./adder.bit...
Writing key file ./adder.nky...                             
INFO: [Vivado 12-1842] Bitgen Completed Successfully.INFO: [Common 17-83] Releasing license: Implementationwrite_bitstream: Time (s): cpu = 00:01:00 ; elapsed = 00:00:59 . Memory (MB): peak = 2289.828 ; gain = 169.934INFO: [Common 17-206] Exiting Vivado at Fri Jun 19 21:11:39 2014...

write_bitstream is regenerating the key file which is not the same as the original key file.


write_bitstream on Linux cannot parse a .nky file created on DOS.

To work around this issue, run dos2unix on the .nky file.

This issue will be Fixed in 2014.3.
AR# 61258
Date 07/03/2014
Status Active
Type General Article
  • Kintex-7
  • Virtex-7
  • Artix-7
  • Vivado Design Suite