def keyexchange(n, ip, publickey_list, secretkey_list, extra_list):
exchangeKey = []
for i in range(n):
if i == ip:
exchangeKey.append(0)
else:
if i > ip:
comKeyint, _ = xc.crypto_kx_client_session_keys(publickey_list[i], secretkey_list[i], extra_list[i])
else:
_, comKeyint = xc.crypto_kx_server_session_keys(publickey_list[i], secretkey_list[i], extra_list[i])
exchangekey = int.from_bytes(xc.crypto_hash_sha256(comKeyint), byteorder='big')
exchangeKey.append(exchangekey)
return exchangeKey
def keyexchange(n, party_i, my_pkey_list, my_skey_list, other_pkey_list):
common_key_list = []
for i in range(n):
#Generate DH (common) keys
if i == party_i:
common_key_list.append(0)
else:
if i > party_i:
common_key_raw, _ = nb.crypto_kx_client_session_keys(
my_pkey_list[i], my_skey_list[i], other_pkey_list[i])
else:
_, common_key_raw = nb.crypto_kx_server_session_keys(
my_pkey_list[i], my_skey_list[i], other_pkey_list[i])
#Hash the common keys
common_key = int.from_bytes(nb.crypto_hash_sha256(common_key_raw),
byteorder='big')
common_key_list.append(common_key)
return common_key_list
def test_hash():
msg = b"message"
h1 = c.crypto_hash(msg)
assert len(h1) == c.crypto_hash_BYTES
assert tohex(h1) == ("f8daf57a3347cc4d6b9d575b31fe6077"
"e2cb487f60a96233c08cb479dbf31538"
"cc915ec6d48bdbaa96ddc1a16db4f4f9"
"6f37276cfcb3510b8246241770d5952c")
assert tohex(h1) == hashlib.sha512(msg).hexdigest()
h2 = c.crypto_hash_sha512(msg)
assert len(h2) == c.crypto_hash_sha512_BYTES
assert tohex(h2) == tohex(h1)
h3 = c.crypto_hash_sha256(msg)
assert len(h3) == c.crypto_hash_sha256_BYTES
assert tohex(h3) == ("ab530a13e45914982b79f9b7e3fba994"
"cfd1f3fb22f71cea1afbf02b460c6d1d")
assert tohex(h3) == hashlib.sha256(msg).hexdigest()
def test_hash():
msg = b"message"
h1 = c.crypto_hash(msg)
assert len(h1) == c.crypto_hash_BYTES
assert tohex(h1) == ("f8daf57a3347cc4d6b9d575b31fe6077"
"e2cb487f60a96233c08cb479dbf31538"
"cc915ec6d48bdbaa96ddc1a16db4f4f9"
"6f37276cfcb3510b8246241770d5952c")
assert tohex(h1) == hashlib.sha512(msg).hexdigest()
h2 = c.crypto_hash_sha512(msg)
assert len(h2) == c.crypto_hash_sha512_BYTES
assert tohex(h2) == tohex(h1)
h3 = c.crypto_hash_sha256(msg)
assert len(h3) == c.crypto_hash_sha256_BYTES
assert tohex(h3) == ("ab530a13e45914982b79f9b7e3fba994"
"cfd1f3fb22f71cea1afbf02b460c6d1d")
assert tohex(h3) == hashlib.sha256(msg).hexdigest()
def dict_keyexchange(peer_list, self_id, my_pkeys, my_skeys, peer_pkeys):
# CDB: The last three parameters are now all dictionaries. Dictionary keys
# are peer ids to which we gave the key, or from which we received the key.
# comkeys is also now a dictionary keyed by peer id.
comkeys = {}
for peer_id in peer_list:
if peer_id > self_id:
common_key_raw, _ = nb.crypto_kx_client_session_keys(
my_pkeys[peer_id], my_skeys[peer_id], peer_pkeys[peer_id])
else:
_, common_key_raw = nb.crypto_kx_server_session_keys(
my_pkeys[peer_id], my_skeys[peer_id], peer_pkeys[peer_id])
# Hash the common keys.
comkeys[peer_id] = int.from_bytes(
nb.crypto_hash_sha256(common_key_raw), byteorder='big')
return comkeys