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flows-rvkrypto.md

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rvkrypto-fips flow

The core implements the RISC-V scalar cryptography extensions. Part of the validation for this is being able to run the most important algorithms that the extension tries to accelerate. Namely: AES(-GCM), SHA256, SHA512, SHA3, SM3 and SM4.

The extern/rvkrypto-fips submodule (from here) contains a small battery of test vectors, and implementations of each algorithm.

Relevant files

  • src/rvkrypto/Makefile.in contains the build and run orchestration.

  • extern/rvkrypto-fips is the submodule containing all of the test framework source code.

Checkout

  • Make sure you have the submodule checked out:
git submodule update --init extern/rvkrypto-fips

Building

  • Note that you will need a toolchain which supports the RISC-V scalar cryptography extension to do this. An experimental one can be obtained here.

  • From the root directory of the core repository ($REPO_HOME), run

make rvkrypto-build

  • This will place the build artifacts in $REPO_WORK/rvkrypto, and also build the core complex testbench for the core, and place a copy of the testbench in $REPO_WORK/rvkrypto.

  • Note the .gtkwl file can be used for GTKWave signal annotations on the decoded instructions.

Running

  • From the root directory of the core repository ($REPO_HOME), run
make rvkrypto-run

  • This will run the built program, and output SIM_PASS if all of the test vectors passed, or SIM_FAIL if not. Verbose output for each passing/failing test vector is disabled.

  • If wavedumping is required, uncomment the +WAVES= line at the bottom of src/rvkrypto/Makefile.in.