def wots_sk_gen(self, secret_seed, adrs: ADRS): # Not necessary
sk = []
for i in range(0, self._len_0):
adrs.set_chain_address(i)
adrs.set_hash_address(0)
sk.append(prf(secret_seed, adrs.copy(), self._n))
return sk
def chain(self, x, i, s, public_seed, adrs: ADRS):
if s == 0:
return bytes(x)
if (i + s) > (self._w - 1):
return -1
tmp = self.chain(x, i, s - 1, public_seed, adrs)
adrs.set_hash_address(i + s - 1)
tmp = hash(public_seed, adrs, tmp, self._n)
return tmp
def wots_pk_gen(self, secret_seed, public_seed, adrs: ADRS):
wots_pk_adrs = adrs.copy()
tmp = bytes()
for i in range(0, self._len_0):
adrs.set_chain_address(i)
adrs.set_hash_address(0)
sk = prf(secret_seed, adrs.copy(), self._n)
tmp += bytes(self.chain(sk, 0, self._w - 1, public_seed, adrs.copy()))
wots_pk_adrs.set_type(ADRS.WOTS_PK)
wots_pk_adrs.set_key_pair_address(adrs.get_key_pair_address())
pk = hash(public_seed, wots_pk_adrs, tmp, self._n)
return pk