BLAKE2 VHDL IP Core

This package provides a VHDL implementation of the BLAKE2 Cryptographic Hash and Message Authentication Code as specified in

Markku-Juhani O. Saarinen and Jean-Philippe Aumasson: The BLAKE2 Cryptographic Hash and Message Authentication Code (MAC). RFC 7693, Internet Engineering Task Force, November 2015. DOI: https://doi.org/10.17487/RFC7693

This intellectual property (IP) core was developed in the course "Digital Integrated Circuits Design" at the Institute of Computer Technology, Vienna University of Technology (TU Wien). Vienna, April 2018.

This package is licensed under the 3-clause BSD license: https://opensource.org/licenses/BSD-3-Clause

The documentation is licensed under the CC BY 4.0 license: https://creativecommons.org/licenses/by/4.0/

Authors: Benedikt Tutzer Dinka Milovancev

Supervisors: Christian Krieg Martin Mosbeck Axel Jantsch

CONTENTS

1. The top entity is implemented in blake2.vhd.

2. blake2b.vhd and blake2s.vhd contain wrappers for BLAKE2b and BLAKE2s and hide some generics of the blake2 entity by setting them to the appropriate values for the chosen algorithm.

This repo contains a testbench for each of the two algorithms. The testbenches compare the output of the corresponding entity to hashes generated by the reference implementation provided in RFC 7693.

To run the tests, execute runsim.sh. The tests are performed using ghdl, so make sure that ghdl is available on your system. It is possible to use VHDL simulators other that ghdl. In this case the simulation script needs to be adapted to the simulator's command-line interface.

HOW TO USE

Split the message to be hashed into chunks of BLOCK_SIZE bytes. Send them to the entity sequentially by setting the message port and raising valid_in for one clock cycle.

message_len needs to be set to the number of bytes that are to be hashed in total. This includes the additional chunk containing the key, so when a key is used, the size of one complete chunk needs to be added to message_len (128 bytes for BLAKE2b, or 64 bytes for BLAKE2s, respectively).

The length of the hash can be chosen by setting hash_len.

After sending one chunk, wait for compress_ready to be HIGH before sending the next chunk. When the last chunk is sent, the input last_chunk needs to be set to HIGH. After the last chunk is encoded, the output valid_out is raised and the hash is available at the hash output port.

TODO

1. Design and implement an Advanced Extensible Interface (AXI) controller to include the core in a system-on-chip (SoC) design. Check out the following repository on github:

   https://github.com/Architech-Silica/Designing-a-Custom-AXI-Slave-Peripheral

2. Implement the core on as many different platforms as possible and report area, timing, power consumption, utilized resources