mirror of
https://gitlab.com/veilid/veilid.git
synced 2024-11-21 08:34:11 -06:00
Merge branch 'remove-demo-chat' into 'main'
Remove demo code from this repo See merge request veilid/veilid!109
This commit is contained in:
TC
commit
23b03de2b4
@ -1,225 +0,0 @@
|
||||
#!/usr/bin/env python
|
||||
|
||||
"""A simple chat server using Veilid's DHT."""
|
||||
|
||||
import argparse
|
||||
import asyncio
|
||||
import sys
|
||||
|
||||
import config
|
||||
|
||||
import veilid
|
||||
|
||||
QUIT = "QUIT"
|
||||
NONCE_LENGTH = 24
|
||||
|
||||
|
||||
async def noop_callback(*args, **kwargs):
|
||||
"""In the real world, we'd use this to process interesting incoming events."""
|
||||
|
||||
return
|
||||
|
||||
|
||||
async def chatter(
|
||||
router: veilid.api.RoutingContext,
|
||||
crypto_system: veilid.CryptoSystem,
|
||||
key: veilid.TypedKey,
|
||||
secret: veilid.SharedSecret,
|
||||
send_subkey: veilid.ValueSubkey,
|
||||
recv_subkey: veilid.ValueSubkey,
|
||||
):
|
||||
"""Read input, write it to the DHT, and print the response from the DHT."""
|
||||
|
||||
last_seq = -1
|
||||
|
||||
async def encrypt(cleartext: str) -> bytes:
|
||||
"""Encrypt the message with the shared secret and a random nonce."""
|
||||
|
||||
nonce = await crypto_system.random_nonce()
|
||||
encrypted = await crypto_system.crypt_no_auth(cleartext.encode(), nonce, secret)
|
||||
return nonce.to_bytes() + encrypted
|
||||
|
||||
async def decrypt(payload: bytes) -> str:
|
||||
"""Decrypt the payload with the shared secret and the payload's nonce."""
|
||||
|
||||
nonce = veilid.Nonce.from_bytes(payload[:NONCE_LENGTH])
|
||||
encrypted = payload[NONCE_LENGTH:]
|
||||
cleartext = await crypto_system.crypt_no_auth(encrypted, nonce, secret)
|
||||
return cleartext.decode()
|
||||
|
||||
# Prime the pumps. Especially when starting the conversation, this
|
||||
# causes the DHT key to propagate to the network.
|
||||
await router.set_dht_value(key, send_subkey, await encrypt("Hello from the world!"))
|
||||
|
||||
while True:
|
||||
try:
|
||||
msg = input("SEND> ")
|
||||
except EOFError:
|
||||
# Cat got your tongue? Hang up.
|
||||
print("Closing the chat.")
|
||||
await router.set_dht_value(key, send_subkey, await encrypt(QUIT))
|
||||
return
|
||||
|
||||
# Write the input message to the DHT key.
|
||||
await router.set_dht_value(key, send_subkey, await encrypt(msg))
|
||||
|
||||
# In the real world, don't do this. People may tease you for it.
|
||||
# This is meant to be easy to understand for demonstration
|
||||
# purposes, not a great pattern. Instead, you'd want to use the
|
||||
# callback function to handle events asynchronously.
|
||||
while True:
|
||||
# Try to get an updated version of the receiving subkey.
|
||||
resp = await router.get_dht_value(key, recv_subkey, True)
|
||||
if resp is None:
|
||||
continue
|
||||
|
||||
# If the other party hasn't sent a newer message, try again.
|
||||
if resp.seq == last_seq:
|
||||
continue
|
||||
|
||||
msg = await decrypt(resp.data)
|
||||
if msg == QUIT:
|
||||
print("Other end closed the chat.")
|
||||
return
|
||||
|
||||
print(f"RECV< {msg}")
|
||||
last_seq = resp.seq
|
||||
break
|
||||
|
||||
|
||||
async def start(host: str, port: int, name: str):
|
||||
"""Begin a conversation with a friend."""
|
||||
|
||||
conn = await veilid.json_api_connect(host, port, noop_callback)
|
||||
|
||||
keys = config.read_keys()
|
||||
my_keypair = keys["self"]
|
||||
their_key = keys["peers"][name]
|
||||
|
||||
members = [
|
||||
veilid.DHTSchemaSMPLMember(my_keypair.key(), 1),
|
||||
veilid.DHTSchemaSMPLMember(their_key, 1),
|
||||
]
|
||||
|
||||
router = await (await conn.new_routing_context()).with_privacy()
|
||||
crypto_system = await conn.get_crypto_system(veilid.CryptoKind.CRYPTO_KIND_VLD0)
|
||||
async with crypto_system, router:
|
||||
secret = await crypto_system.cached_dh(their_key, my_keypair.secret())
|
||||
|
||||
record = await router.create_dht_record(veilid.DHTSchema.smpl(0, members))
|
||||
print(f"New chat key: {record.key}")
|
||||
print("Give that to your friend!")
|
||||
|
||||
# Close this key first. We'll reopen it for writing with our saved key.
|
||||
await router.close_dht_record(record.key)
|
||||
|
||||
await router.open_dht_record(record.key, my_keypair)
|
||||
|
||||
try:
|
||||
# Write to the 1st subkey and read from the 2nd.
|
||||
await chatter(router, crypto_system, record.key, secret, 0, 1)
|
||||
finally:
|
||||
await router.close_dht_record(record.key)
|
||||
await router.delete_dht_record(record.key)
|
||||
|
||||
|
||||
async def respond(host: str, port: int, name: str, key: str):
|
||||
"""Reply to a friend's chat."""
|
||||
|
||||
conn = await veilid.json_api_connect(host, port, noop_callback)
|
||||
|
||||
keys = config.read_keys()
|
||||
my_keypair = keys["self"]
|
||||
their_key = keys["peers"][name]
|
||||
|
||||
router = await (await conn.new_routing_context()).with_privacy()
|
||||
crypto_system = await conn.get_crypto_system(veilid.CryptoKind.CRYPTO_KIND_VLD0)
|
||||
async with crypto_system, router:
|
||||
secret = await crypto_system.cached_dh(their_key, my_keypair.secret())
|
||||
|
||||
await router.open_dht_record(key, my_keypair)
|
||||
|
||||
# As the responder, we're writing to the 2nd subkey and reading from the 1st.
|
||||
await chatter(router, crypto_system, key, secret, 1, 0)
|
||||
|
||||
|
||||
async def keygen(host: str, port: int):
|
||||
"""Generate a keypair."""
|
||||
|
||||
conn = await veilid.json_api_connect(host, port, noop_callback)
|
||||
|
||||
crypto_system = await conn.get_crypto_system(veilid.CryptoKind.CRYPTO_KIND_VLD0)
|
||||
async with crypto_system:
|
||||
my_keypair = await crypto_system.generate_key_pair()
|
||||
|
||||
keys = config.read_keys()
|
||||
if keys["self"]:
|
||||
print("You already have a keypair.")
|
||||
sys.exit(1)
|
||||
|
||||
keys["self"] = my_keypair
|
||||
config.write_keys(keys)
|
||||
|
||||
print(f"Your new public key is {my_keypair.key()}. Share it with your friends!")
|
||||
|
||||
|
||||
async def add_friend(host: str, port: int, name: str, pubkey: str):
|
||||
"""Add a friend's public key."""
|
||||
|
||||
keys = config.read_keys()
|
||||
keys["peers"][name] = pubkey
|
||||
config.write_keys(keys)
|
||||
|
||||
|
||||
async def clean(host: str, port: int, key: str):
|
||||
"""Delete a DHT key."""
|
||||
|
||||
conn = await veilid.json_api_connect(host, port, noop_callback)
|
||||
|
||||
router = await (await conn.new_routing_context()).with_privacy()
|
||||
async with router:
|
||||
await router.close_dht_record(key)
|
||||
await router.delete_dht_record(key)
|
||||
|
||||
|
||||
def handle_command_line(arglist: list[str]):
|
||||
"""Process the command line.
|
||||
|
||||
This isn't the interesting part."""
|
||||
|
||||
parser = argparse.ArgumentParser(description="Veilid chat demonstration")
|
||||
parser.add_argument("--host", default="localhost", help="Address of the Veilid server host.")
|
||||
parser.add_argument("--port", type=int, default=5959, help="Port of the Veilid server.")
|
||||
|
||||
subparsers = parser.add_subparsers(required=True)
|
||||
|
||||
cmd_start = subparsers.add_parser("start", help=start.__doc__)
|
||||
cmd_start.add_argument("name", help="Your friend's name")
|
||||
cmd_start.set_defaults(func=start)
|
||||
|
||||
cmd_respond = subparsers.add_parser("respond", help=respond.__doc__)
|
||||
cmd_respond.add_argument("name", help="Your friend's name")
|
||||
cmd_respond.add_argument("key", help="The chat's DHT key")
|
||||
cmd_respond.set_defaults(func=respond)
|
||||
|
||||
cmd_keygen = subparsers.add_parser("keygen", help=keygen.__doc__)
|
||||
cmd_keygen.set_defaults(func=keygen)
|
||||
|
||||
cmd_add_friend = subparsers.add_parser("add-friend", help=add_friend.__doc__)
|
||||
cmd_add_friend.add_argument("name", help="Your friend's name")
|
||||
cmd_add_friend.add_argument("pubkey", help="Your friend's public key")
|
||||
cmd_add_friend.set_defaults(func=add_friend)
|
||||
|
||||
cmd_clean = subparsers.add_parser("clean", help=clean.__doc__)
|
||||
cmd_clean.add_argument("key", help="DHT key to delete")
|
||||
cmd_clean.set_defaults(func=clean)
|
||||
|
||||
args = parser.parse_args(arglist)
|
||||
kwargs = args.__dict__
|
||||
func = kwargs.pop("func")
|
||||
|
||||
asyncio.run(func(**kwargs))
|
||||
|
||||
|
||||
if __name__ == "__main__":
|
||||
handle_command_line(sys.argv[1:])
|
||||
@ -1,33 +0,0 @@
|
||||
"""Load and save configuration."""
|
||||
|
||||
import json
|
||||
from pathlib import Path
|
||||
|
||||
import veilid
|
||||
|
||||
KEYFILE = Path(".demokeys")
|
||||
|
||||
|
||||
def read_keys() -> dict:
|
||||
"""Load the stored keys from disk."""
|
||||
|
||||
try:
|
||||
raw = KEYFILE.read_text()
|
||||
except FileNotFoundError:
|
||||
return {
|
||||
"self": None,
|
||||
"peers": {},
|
||||
}
|
||||
|
||||
keys = json.loads(raw)
|
||||
if keys["self"] is not None:
|
||||
keys["self"] = veilid.KeyPair(keys["self"])
|
||||
for name, pubkey in keys["peers"].items():
|
||||
keys["peers"][name] = veilid.PublicKey(pubkey)
|
||||
return keys
|
||||
|
||||
|
||||
def write_keys(keydata: dict):
|
||||
"""Save the keys to disk."""
|
||||
|
||||
KEYFILE.write_text(json.dumps(keydata, indent=2))
|
||||
Loading…
Reference in New Issue
Block a user