SHA-256 This is my implementaion of SHA-256 from NIST FIPS 180-4. ➜ make to build. Example: ➜ ./sha256 abc ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad ➜ ./sha256 file test.txt ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad