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#!/usr/bin/env python3
# Known Answer Test generator
import json
import hashlib
import secrets
def blake2s(w, key):
ctx = hashlib.blake2s(key=key)
ctx.update(w)
return ctx.digest().hex()
def out(s):
o = [s[i:i+2] for i in range(0, len(s), 2)] # split into pairs
o = [f'0x{i}' for i in o] # prepend 0x and join
return ', '.join(o)
if __name__ == '__main__':
w = b''
for i in range(0, 256):
w += i.to_bytes(1, 'little')
k = secrets.token_bytes(32)
print('#pragma once\n')
print(f'static const unsigned KATs_len = 256;')
print(f'static const uint8_t KAT_secret[32] = {{ {", ".join([hex(i) for i in k])} }};')
print(f'static const uint8_t KATs[256][32] = {{')
for i in range(0, 256):
o = blake2s(w[0:i], b'')
print(f' // {i}')
print(f' {{ {out(o)} }},')
print(f'}};')
print(f'static const uint8_t secret_KATs[256][32] = {{')
for i in range(0, 256):
o = blake2s(w[0:i], k)
print(f' // {i}')
print(f' {{ {out(o)} }},')
print(f'}};')
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