You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
155 lines
4.9 KiB
155 lines
4.9 KiB
# This is a simple python flask implementation of 'How To Implement A Basic ActivityPub Server'
|
|
# https://blog.joinmastodon.org/2018/06/how-to-implement-a-basic-activitypub-server/
|
|
# © 2018 homebrewserver.club contributors
|
|
|
|
# This program is free software: you can redistribute it and/or modify
|
|
# it under the terms of the GNU General Public License as published by
|
|
# the Free Software Foundation, either version 3 of the License, or
|
|
# (at your option) any later version.
|
|
|
|
# This program is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
# GNU General Public License for more details.
|
|
|
|
# You should have received a copy of the GNU General Public License
|
|
# along with this program. If not, see <https://www.gnu.org/licenses/>.
|
|
|
|
import flask
|
|
import os
|
|
import requests
|
|
import base64
|
|
import json
|
|
|
|
from flask import request
|
|
from flask import Response
|
|
from time import strftime, gmtime
|
|
|
|
|
|
from Crypto.Hash import SHA256
|
|
from Crypto.Signature import PKCS1_v1_5
|
|
from Crypto.PublicKey import RSA
|
|
|
|
#
|
|
import logging
|
|
import http.client as http_client
|
|
http_client.HTTPConnection.debuglevel = 1
|
|
|
|
logging.basicConfig()
|
|
logging.getLogger().setLevel(logging.DEBUG)
|
|
requests_log = logging.getLogger("requests.packages.urllib3")
|
|
requests_log.setLevel(logging.DEBUG)
|
|
requests_log.propagate = True
|
|
|
|
#
|
|
|
|
#Config
|
|
DOMAIN = 'https://my-example.com'
|
|
USERNAME = 'alice'
|
|
|
|
def public_key():
|
|
"""
|
|
Use commandline openssl to generate a public and private key
|
|
"""
|
|
if not os.path.exists('public.pem'):
|
|
os.system('openssl genrsa -out private.pem 2048')
|
|
os.system('openssl rsa -in private.pem -outform PEM -pubout -out public.pem')
|
|
else:
|
|
public_key = open('public.pem').read()
|
|
public_key = public_key.replace('\n','\\n') #public key shouldn't contain verbatim linebreaks in json
|
|
return public_key
|
|
|
|
public_key() #generate public_key on first launch
|
|
|
|
def build_signing_string(headers, header_values):
|
|
return '\n'.join(map(lambda x: ': '.join([x.lower(), headers[x]]), header_values))
|
|
|
|
def sign_header(private_key, key_id, host):
|
|
"""
|
|
Sign HTTP headers
|
|
"""
|
|
date = strftime("%a, %d %b %Y %H:%M:%S GMT", gmtime()) #RFC1123 Time format
|
|
|
|
#Based on https://github.com/autogestion/pubgate/
|
|
keyfile = open(private_key,'rb').read()
|
|
secret = RSA.import_key(keyfile)
|
|
signer = PKCS1_v1_5.new(secret)
|
|
|
|
|
|
headers = { 'request-target': 'post /inbox',
|
|
'host': host, #this is the destination host
|
|
'date': date,
|
|
}
|
|
sigheaders = headers.keys()
|
|
|
|
sigstring = build_signing_string(headers, sigheaders)
|
|
print(sigstring
|
|
)
|
|
digest = SHA256.new()
|
|
digest.update(sigstring.encode('ascii'))
|
|
sigdata = base64.b64encode(signer.sign(digest))
|
|
|
|
sig = {
|
|
'keyId': key_id,
|
|
'algorithm': 'rsa-sha256',
|
|
'headers': ' '.join(sigheaders),
|
|
'signature': sigdata.decode('ascii')
|
|
}
|
|
|
|
headers["signature"] = ','.join(['{}="{}"'.format(k, v) for k, v in sig.items()])
|
|
|
|
return headers
|
|
|
|
|
|
|
|
#Flask
|
|
app = flask.Flask(__name__)
|
|
|
|
@app.route('/')
|
|
def index():
|
|
return 'It works! Now try to look for a user@my-example.com via the mastodon interface'
|
|
|
|
@app.route('/.well-known/webfinger')
|
|
def finger():
|
|
"""
|
|
Respond to webfinger queries (GET /.well-known/webfinger?resource=acct:alice@my-example.com) with a json object pointing to the actor
|
|
see templates/webfinger.json
|
|
|
|
"""
|
|
if request.args.get('resource'):
|
|
query = request.args.get('resource')
|
|
|
|
actor = query.split(':')[1].split('@')[0] # from 'acct:alice@my-example.com' to 'alice'
|
|
|
|
json = flask.render_template('webfinger.json', query=query, actor=actor, domain=DOMAIN) # render our ActivityPub answer
|
|
|
|
return Response(response=json, status=200, mimetype="application/json") # return that answer as a json object
|
|
|
|
@app.route('/users/<actor>')
|
|
def profile(actor):
|
|
"""
|
|
Return an Actor object
|
|
see templates/actor.json
|
|
"""
|
|
json = flask.render_template('actor.json', preferred_username=USERNAME, actor=actor, domain=DOMAIN, public_key=public_key()) # render our ActivityPub answer
|
|
return Response(response=json, status=200, mimetype="application/json") # return that answer as a json object
|
|
|
|
|
|
@app.route('/post/', methods=['POST','GET'])
|
|
def post():
|
|
date = strftime("%a, %d %b %Y %H:%M:%S GMT", gmtime())
|
|
activity=json.loads(flask.render_template('create.json',
|
|
domain=DOMAIN,public_key=public_key(),actor=USERNAME,host='DOMAIN', date=date))
|
|
signed_headers = sign_header('private.pem', DOMAIN+'/users/'+USERNAME+'#main-key','https://post.lurk.org')
|
|
|
|
r = requests.post('https://post.lurk.org/inbox', json=activity, headers=signed_headers)
|
|
|
|
a = (r.status_code, r.text, r.headers)
|
|
a = str(a)
|
|
|
|
return a
|
|
|
|
if __name__ == '__main__':
|
|
app.debug =True
|
|
app.run()
|
|
|
|
|