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all:
debug:
clean:
rm -f *.py~ Makefile~ README.md~
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# epicyon
Some experiments with ActivityPub in Python.
## Install
``` bash
sudo pacman -S python-pysocks python-pycryptodome python-beautifulsoup4
```

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__filename__ = "daemon.py"
__author__ = "Bob Mottram"
__license__ = "AGPL3+"
__version__ = "0.0.1"
__maintainer__ = "Bob Mottram"
__email__ = "bob@freedombone.net"
__status__ = "Production"
from http.server import BaseHTTPRequestHandler, HTTPServer
#import socketserver
import json
import cgi
from pprint import pprint
from session import createSession
from httpsig import testHttpsig
from webfinger import webfingerMeta
from webfinger import webfingerLookup
from person import personLookup
from person import personKeyLookup
import os
thisDomain=''
def readFollowList(filename: str):
"""Returns a list of ActivityPub addresses to follow
"""
followlist=[]
if not os.path.isfile(filename):
return followlist
followUsers = open(filename, "r")
for u in followUsers:
if u not in followlist:
username,domain = parseHandle(u)
if username:
followlist.append(username+'@'+domain)
return followlist
class PubServer(BaseHTTPRequestHandler):
def _set_headers(self,fileFormat):
self.send_response(200)
self.send_header('Content-type', fileFormat)
self.end_headers()
def _404(self):
self.send_response(404)
self.send_header('Content-Type', 'text/html; charset=utf-8')
self.end_headers()
self.wfile.write("<html><head></head><body><h1>404 Not Found</h1></body></html>".encode('utf-8'))
def _webfinger(self) -> bool:
if not self.path.startswith('/.well-known'):
return False
if self.path.startswith('/.well-known/host-meta'):
wfResult=webfingerMeta()
if wfResult:
self._set_headers('application/xrd+xml')
self.wfile.write(wfResult.encode('utf-8'))
return
wfResult=webfingerLookup(self.path)
if wfResult:
self._set_headers('application/json')
self.wfile.write(json.dumps(wfResult).encode('utf-8'))
else:
self._404()
return True
def permittedDir(self,path):
if path.startswith('/wfendpoints') or \
path.startswith('/keys') or \
path.startswith('/accounts'):
return False
return True
def do_GET(self):
if not self.permittedDir(self.path):
self._404()
return
# get webfinger endpoint for a person
if self._webfinger():
return
# look up a person
getPerson = personLookup(thisDomain,self.path)
if getPerson:
self._set_headers('application/json')
self.wfile.write(json.dumps(getPerson).encode('utf-8'))
return
getPersonKey = personKeyLookup(thisDomain,self.path)
if getPersonKey:
self._set_headers('text/html; charset=utf-8')
self.wfile.write(getPersonKey.encode('utf-8'))
return
# check that a json file was requested
baseDir=os.getcwd()
if not self.path.endswith('.json'):
self._404()
return
# check that the file exists
filename=baseDir+self.path
if os.path.isfile(filename):
self._set_headers('application/json')
with open(filename, 'r', encoding='utf8') as File:
content = File.read()
contentJson=json.loads(content)
self.wfile.write(json.dumps(contentJson).encode('utf8'))
else:
self._404()
def do_HEAD(self):
self._set_headers('application/json')
def do_POST(self):
ctype, pdict = cgi.parse_header(self.headers.getheader('content-type'))
# refuse to receive non-json content
if ctype != 'application/json':
self.send_response(400)
self.end_headers()
return
# read the message and convert it into a python dictionary
length = int(self.headers.getheader('content-length'))
message = json.loads(self.rfile.read(length))
# add a property to the object, just to mess with data
message['received'] = 'ok'
# send the message back
self._set_headers('application/json')
self.wfile.write(json.dumps(message).encode('utf-8'))
def runDaemon(domain: str,port=80,useTor=False) -> None:
global thisDomain
thisDomain=domain
if len(domain)==0:
domain='127.0.0.1'
if '.' not in domain:
print('Invalid domain: ' + domain)
return
session = createSession(useTor)
print('Running tests...')
testHttpsig()
print('Tests succeeded\n')
serverAddress = ('', port)
httpd = HTTPServer(serverAddress, PubServer)
print('Running ActivityPub daemon on ' + thisDomain + ' port ' + str(port))
httpd.serve_forever()

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__filename__ = "epicyon.py"
__author__ = "Bob Mottram"
__license__ = "AGPL3+"
__version__ = "0.0.1"
__maintainer__ = "Bob Mottram"
__email__ = "bob@freedombone.net"
__status__ = "Production"
from person import createPerson
from person import setPreferredUsername
from webfinger import webfingerHandle
from posts import getUserPosts
from session import createSession
import json
import sys
import requests
from pprint import pprint
from httpsig import testHttpsig
from daemon import runDaemon
useTor=False
session = createSession(useTor)
privateKeyPem,publicKeyPem,person,wfEndpoint=createPerson('testuser','mydomain.com',True,True)
setPreferredUsername('testuser','mydomain.com','badger')
runDaemon('mydomain.com',6227,False)
#testHttpsig()
#sys.exit()
privateKeyPem,publicKeyPem,person,wfEndpoint=createPerson('testuser','mydomain.com',True,True)
sys.exit()
#pprint(person)
#print('\n')
#pprint(wfEndpoint)
allowedDomains=['mastodon.social']
handle="https://mastodon.social/@Gargron"
wfRequest = webfingerHandle(session,handle,True)
if not wfRequest:
sys.exit()
#wfResult = json.dumps(wfRequest, indent=4, sort_keys=True)
#print(str(wfResult))
#sys.exit()
maxMentions=10
maxEmoji=10
maxAttachments=5
userPosts = getUserPosts(session,wfRequest,2,maxMentions,maxEmoji,maxAttachments,allowedDomains)
print(str(userPosts))

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__filename__ = "posts.py"
__author__ = "Bob Mottram"
__credits__ = ['lamia']
__license__ = "AGPL3+"
__version__ = "0.0.1"
__maintainer__ = "Bob Mottram"
__email__ = "bob@freedombone.net"
__status__ = "Production"
from person import createPerson
from Crypto.PublicKey import RSA
from Crypto.Hash import SHA256
#from Crypto.Signature import PKCS1_v1_5
from Crypto.Signature import pkcs1_15
from requests.auth import AuthBase
import base64
import json
def signPostHeaders(privateKeyPem: str, username: str, domain: str, path: str, https: bool, messageBodyJson) -> str:
"""Returns a raw signature string that can be plugged into a header and
used to verify the authenticity of an HTTP transmission.
"""
prefix='https'
if not https:
prefix='http'
keyID = prefix+'://'+domain+'/'+username+'#main-key'
if not messageBodyJson:
headers = {'host': domain}
else:
bodyDigest = base64.b64encode(SHA256.new(messageBodyJson.encode()).digest())
headers = {'host': domain, 'digest': f'SHA-256={bodyDigest}'}
privateKeyPem = RSA.import_key(privateKeyPem)
headers.update({
'(request-target)': f'post {path}',
})
# build a digest for signing
signedHeaderKeys = headers.keys()
signedHeaderText = ''
for headerKey in signedHeaderKeys:
signedHeaderText += f'{headerKey}: {headers[headerKey]}\n'
signedHeaderText = signedHeaderText.strip()
headerDigest = SHA256.new(signedHeaderText.encode('ascii'))
# Sign the digest
rawSignature = pkcs1_15.new(privateKeyPem).sign(headerDigest)
signature = base64.b64encode(rawSignature).decode('ascii')
# Put it into a valid HTTP signature format
signatureDict = {
'keyId': keyID,
'algorithm': 'rsa-sha256',
'headers': ' '.join(signedHeaderKeys),
'signature': signature
}
signatureHeader = ','.join(
[f'{k}="{v}"' for k, v in signatureDict.items()])
return signatureHeader
def verifyPostHeaders(https: bool, publicKeyPem: str, headers: dict, path: str, GETmethod: bool, messageBodyJson: str) -> bool:
"""Returns true or false depending on if the key that we plugged in here
validates against the headers, method, and path.
publicKeyPem - the public key from an rsa key pair
headers - should be a dictionary of request headers
path - the relative url that was requested from this site
GETmethod - GET or POST
messageBodyJson - the received request body (used for digest)
"""
if GETmethod:
method='GET'
else:
method='POST'
prefix='https'
if not https:
prefix='http'
publicKeyPem = RSA.import_key(publicKeyPem)
# Build a dictionary of the signature values
signatureHeader = headers['signature']
signatureDict = {
k: v[1:-1]
for k, v in [i.split('=', 1) for i in signatureHeader.split(',')]
}
# Unpack the signed headers and set values based on current headers and
# body (if a digest was included)
signedHeaderList = []
for signedHeader in signatureDict['headers'].split(' '):
if signedHeader == '(request-target)':
signedHeaderList.append(
f'(request-target): {method.lower()} {path}')
elif signedHeader == 'digest':
bodyDigest = base64.b64encode(SHA256.new(messageBodyJson.encode()).digest())
signedHeaderList.append(f'digest: SHA-256={bodyDigest}')
else:
signedHeaderList.append(
f'{signedHeader}: {headers[signedHeader]}')
# Now we have our header data digest
signedHeaderText = '\n'.join(signedHeaderList)
headerDigest = SHA256.new(signedHeaderText.encode('ascii'))
# Get the signature, verify with public key, return result
signature = base64.b64decode(signatureDict['signature'])
try:
pkcs1_15.new(publicKeyPem).verify(headerDigest, signature)
return True
except (ValueError, TypeError):
return False
def testHttpsigBase(withDigest):
print('testHttpsig(' + str(withDigest) + ')')
username='socrates'
domain='argumentative.social'
https=True
privateKeyPem,publicKeyPem,person,wfEndpoint=createPerson(username,domain,https,False)
messageBodyJson = '{"a key": "a value", "another key": "A string"}'
if not withDigest:
headers = {'host': domain}
else:
bodyDigest = base64.b64encode(SHA256.new(messageBodyJson.encode()).digest())
headers = {'host': domain, 'digest': f'SHA-256={bodyDigest}'}
path='/inbox'
signatureHeader = signPostHeaders(privateKeyPem, username, domain, path, https, None)
headers['signature'] = signatureHeader
assert verifyPostHeaders(https, publicKeyPem, headers, '/inbox' ,False, messageBodyJson)
assert verifyPostHeaders(https, publicKeyPem, headers, '/parambulator/inbox', False , messageBodyJson) == False
assert verifyPostHeaders(https, publicKeyPem, headers, '/inbox', True, messageBodyJson) == False
if not withDigest:
# fake domain
headers = {'host': 'bogon.domain'}
else:
# correct domain but fake message
messageBodyJson = '{"a key": "a value", "another key": "Fake GNUs"}'
bodyDigest = base64.b64encode(SHA256.new(messageBodyJson.encode()).digest())
headers = {'host': domain, 'digest': f'SHA-256={bodyDigest}'}
headers['signature'] = signatureHeader
assert verifyPostHeaders(https, publicKeyPem, headers, '/inbox', True, messageBodyJson) == False
def testHttpsig():
testHttpsigBase(False)
testHttpsigBase(True)

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__filename__ = "person.py"
__author__ = "Bob Mottram"
__license__ = "AGPL3+"
__version__ = "0.0.1"
__maintainer__ = "Bob Mottram"
__email__ = "bob@freedombone.net"
__status__ = "Production"
import json
import commentjson
import os
import fileinput
from Crypto.PublicKey import RSA
from webfinger import createWebfingerEndpoint
from webfinger import storeWebfingerEndpoint
def generateRSAKey() -> (str,str):
key = RSA.generate(2048)
privateKeyPem = key.exportKey("PEM").decode("utf-8")
publicKeyPem = key.publickey().exportKey("PEM").decode("utf-8")
return privateKeyPem,publicKeyPem
def createPerson(username: str,domain: str,https: bool, saveToFile: bool) -> (str,str,{},{}):
"""Returns the private key, public key, actor and webfinger endpoint
"""
prefix='https'
if not https:
prefix='http'
privateKeyPem,publicKeyPem=generateRSAKey()
webfingerEndpoint=createWebfingerEndpoint(username,domain,https,publicKeyPem)
if saveToFile:
storeWebfingerEndpoint(username,domain,webfingerEndpoint)
newPerson = {'@context': ['https://www.w3.org/ns/activitystreams',
'https://w3id.org/security/v1',
{'Emoji': 'toot:Emoji',
'Hashtag': 'as:Hashtag',
'IdentityProof': 'toot:IdentityProof',
'PropertyValue': 'schema:PropertyValue',
'alsoKnownAs': {'@id': 'as:alsoKnownAs', '@type': '@id'},
'featured': {'@id': 'toot:featured', '@type': '@id'},
'focalPoint': {'@container': '@list', '@id': 'toot:focalPoint'},
'manuallyApprovesFollowers': 'as:manuallyApprovesFollowers',
'movedTo': {'@id': 'as:movedTo', '@type': '@id'},
'schema': 'http://schema.org#',
'toot': 'http://joinmastodon.org/ns#',
'value': 'schema:value'}],
'attachment': [],
'endpoints': {'sharedInbox': prefix+'://'+domain+'/inbox'},
'featured': prefix+'://'+domain+'/users/'+username+'/collections/featured',
'followers': prefix+'://'+domain+'/users/'+username+'/followers',
'following': prefix+'://'+domain+'/users/'+username+'/following',
'icon': {'mediaType': 'image/png',
'type': 'Image',
'url': prefix+'://'+domain+'/users/'+username+'_icon.png'},
'id': prefix+'://'+domain+'/users/'+username,
'image': {'mediaType': 'image/png',
'type': 'Image',
'url': prefix+'://'+domain+'/users/'+username+'.png'},
'inbox': prefix+'://'+domain+'/users/'+username+'/inbox',
'manuallyApprovesFollowers': True,
'name': username,
'outbox': prefix+'://'+domain+'/users/'+username+'/outbox',
'preferredUsername': ''+username,
'publicKey': {'id': prefix+'://'+domain+'/users/'+username+'/main-key',
'owner': prefix+'://'+domain+'/users/'+username,
'publicKeyPem': publicKeyPem,
'summary': '',
'tag': [],
'type': 'Person',
'url': prefix+'://'+domain+'/@'+username}
}
if saveToFile:
# save person to file
handle=username.lower()+'@'+domain.lower()
baseDir=os.getcwd()
peopleSubdir='/accounts'
if not os.path.isdir(baseDir+peopleSubdir):
os.mkdir(baseDir+peopleSubdir)
filename=baseDir+peopleSubdir+'/'+handle+'.json'
with open(filename, 'w') as fp:
commentjson.dump(newPerson, fp, indent=4, sort_keys=False)
# save the private key
privateKeysSubdir='/keys/private'
if not os.path.isdir(baseDir+'/keys'):
os.mkdir(baseDir+'/keys')
if not os.path.isdir(baseDir+privateKeysSubdir):
os.mkdir(baseDir+privateKeysSubdir)
filename=baseDir+privateKeysSubdir+'/'+handle+'.key'
with open(filename, "w") as text_file:
print(privateKeyPem, file=text_file)
# save the public key
publicKeysSubdir='/keys/public'
if not os.path.isdir(baseDir+publicKeysSubdir):
os.mkdir(baseDir+publicKeysSubdir)
filename=baseDir+publicKeysSubdir+'/'+handle+'.pem'
with open(filename, "w") as text_file:
print(publicKeyPem, file=text_file)
return privateKeyPem,publicKeyPem,newPerson,webfingerEndpoint
def validUsername(username):
forbiddenChars=['.',' ','/','?',':',';','@']
for c in forbiddenChars:
if c in username:
return False
return True
def personKeyLookup(domain: str,path: str) -> str:
"""Lookup the public key of the person with a given username
"""
if not path.endswith('/main-key'):
return None
if not path.startswith('/users/'):
return None
username=path.replace('/users/','',1).replace('/main-key','')
if not validUsername(username):
return None
handle=username.lower()+'@'+domain.lower()
baseDir=os.getcwd()
filename=baseDir+'/accounts/'+handle.lower()+'.json'
if not os.path.isfile(filename):
return None
personJson={"user": "unknown"}
with open(filename, 'r') as fp:
personJson=commentjson.load(fp)
if personJson.get('publicKey'):
if personJson['publicKey'].get('publicKeyPem'):
return personJson['publicKey']['publicKeyPem']
return None
def personLookup(domain: str,path: str) -> {}:
"""Lookup the person for an given username
"""
notPersonLookup=['/inbox','/outbox','/followers','/following','/featured','.png','.jpg','.gif','.mpv','#main-key','/main-key']
for ending in notPersonLookup:
if path.endswith(ending):
return None
username=None
if path.startswith('/users/'):
username=path.replace('/users/','',1)
if path.startswith('/@'):
username=path.replace('/@','',1)
if not username:
return None
if not validUsername(username):
return None
handle=username.lower()+'@'+domain.lower()
baseDir=os.getcwd()
filename=baseDir+'/accounts/'+handle.lower()+'.json'
if not os.path.isfile(filename):
return None
personJson={"user": "unknown"}
with open(filename, 'r') as fp:
personJson=commentjson.load(fp)
return personJson
def setPreferredUsername(username: str, domain: str, preferredName: str) -> bool:
if len(preferredName)>32:
return False
handle=username.lower()+'@'+domain.lower()
baseDir=os.getcwd()
filename=baseDir+'/accounts/'+handle.lower()+'.json'
if not os.path.isfile(filename):
return False
personJson=None
with open(filename, 'r') as fp:
personJson=commentjson.load(fp)
if not personJson:
return False
personJson['preferredUsername']=preferredName
with open(filename, 'w') as fp:
commentjson.dump(personJson, fp, indent=4, sort_keys=False)
return True

208
posts.py 100644
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__filename__ = "posts.py"
__author__ = "Bob Mottram"
__license__ = "AGPL3+"
__version__ = "0.0.1"
__maintainer__ = "Bob Mottram"
__email__ = "bob@freedombone.net"
__status__ = "Production"
import requests
import json
import html
from random import randint
from session import getJson
try:
from BeautifulSoup import BeautifulSoup
except ImportError:
from bs4 import BeautifulSoup
def permitted(url: str,allowedDomains) -> bool:
"""Is a url from one of the permitted domains?
"""
for domain in allowedDomains:
if domain in url:
return True
return False
def cleanHtml(rawHtml: str) -> str:
text = BeautifulSoup(rawHtml, 'html.parser').get_text()
return html.unescape(text)
def getUserUrl(wfRequest) -> str:
if wfRequest.get('links'):
for link in wfRequest['links']:
if link.get('type') and link.get('href'):
if link['type'] == 'application/activity+json':
return link['href']
return None
def parseUserFeed(feedUrl,asHeader) -> None:
session = requests.session()
session.proxies = {}
headers=asHeader
headers['User-agent'] = "HotJava/1.1.2 FCS"
session.cookies.clear()
feed = session.get(feedUrl, headers=asHeader).json()
if 'orderedItems' in feed:
for item in feed['orderedItems']:
yield item
nextUrl = None
if 'first' in feed:
nextUrl = feed['first']
elif 'next' in feed:
nextUrl = feed['next']
if nextUrl:
for item in parseUserFeed(nextUrl,asHeader):
yield item
def getUserPosts(session,wfRequest,maxPosts,maxMentions,maxEmoji,maxAttachments,allowedDomains) -> {}:
userPosts={}
asHeader = {'Accept': 'application/ld+json; profile="https://www.w3.org/ns/activitystreams"'}
userUrl = getUserUrl(wfRequest)
if not userUrl:
return userPosts
userJson = getJson(session,userUrl,asHeader,None)
if not userJson.get('outbox'):
return userPosts
feedUrl = userJson['outbox']
i = 0
for item in parseUserFeed(feedUrl,asHeader):
if not item.get('type'):
continue
if item['type'] != 'Create':
continue
if not item.get('object'):
continue
published = item['object']['published']
if not userPosts.get(published):
content = item['object']['content']
mentions=[]
emoji={}
if item['object'].get('tag'):
for tagItem in item['object']['tag']:
tagType=tagItem['type'].lower()
if tagType=='emoji':
if tagItem.get('name') and tagItem.get('icon'):
if tagItem['icon'].get('url'):
# No emoji from non-permitted domains
if permitted(tagItem['icon']['url'],allowedDomains):
emojiName=tagItem['name']
emojiIcon=tagItem['icon']['url']
emoji[emojiName]=emojiIcon
if tagType=='mention':
if tagItem.get('name'):
if tagItem['name'] not in mentions:
mentions.append(tagItem['name'])
if len(mentions)>maxMentions:
continue
if len(emoji)>maxEmoji:
continue
summary = ''
if item['object'].get('summary'):
if item['object']['summary']:
summary = item['object']['summary']
inReplyTo = ''
if item['object'].get('inReplyTo'):
if item['object']['inReplyTo']:
# No replies to non-permitted domains
if not permitted(item['object']['inReplyTo'],allowedDomains):
continue
inReplyTo = item['object']['inReplyTo']
conversation = ''
if item['object'].get('conversation'):
if item['object']['conversation']:
# no conversations originated in non-permitted domains
if permitted(item['object']['conversation'],allowedDomains):
conversation = item['object']['conversation']
attachment = []
if item['object'].get('attachment'):
if item['object']['attachment']:
for attach in item['object']['attachment']:
if attach.get('name') and attach.get('url'):
# no attachments from non-permitted domains
if permitted(attach['url'],allowedDomains):
attachment.append([attach['name'],attach['url']])
sensitive = False
if item['object'].get('sensitive'):
sensitive = item['object']['sensitive']
userPosts[published] = {
"sensitive": sensitive,
"inreplyto": inReplyTo,
"summary": summary,
"html": content,
"plaintext": cleanHtml(content),
"attachment": attachment,
"mentions": mentions,
"emoji": emoji,
"conversation": conversation
}
#print(str(item)+'\n')
i += 1
if i == maxPosts:
break
return userPosts
def createPublicPost(username: str, domain: str, https: bool, content: str, followersOnly: bool) -> {}:
prefix='https'
if not https:
prefix='http'
statusNumber=str(randint(100000000000000000,999999999999999999))
currTime=datetime.datetime.utcnow()
published=currTime.strftime("%Y-%m-%dT%H:%M:%SZ")
conversationDate=currTime.strftime("%Y-%m-%d")
conversationId=str(randint(100000000,999999999))
postTo='https://www.w3.org/ns/activitystreams#Public'
postCC=prefix+'://'+domain+'/users/'+username+'/followers'
if followersOnly:
postTo=postCC
postCC=''
newPost = {
'id': prefix+'://'+domain+'/users/'+username+'/statuses/'+statusNumber+'/activity',
'type': 'Create',
'actor': prefix+'://'+domain+'/users/'+username,
'published': published,
'to': ['https://www.w3.org/ns/activitystreams#Public'],
'cc': [prefix+'://'+domain+'/users/'+username+'/followers'],
'object': {'id': prefix+'://'+domain+'/users/'+username+'/statuses/'+statusNumber,
'type': 'Note',
'summary': None,
'inReplyTo': None,
'published': published,
'url': prefix+'://'+domain+'/@'+username+'/'+statusNumber,
'attributedTo': prefix+'://'+domain+'/users/'+username,
'to': ['https://www.w3.org/ns/activitystreams#Public'],
'cc': [prefix+'://'+domain+'/users/'+username+'/followers'],
'sensitive': False,
'atomUri': prefix+'://'+domain+'/users/'+username+'/statuses/'+statusNumber,
'inReplyToAtomUri': None,
'conversation': 'tag:'+domain+','+conversationDate+':objectId='+conversationId+':objectType=Conversation',
'content': content,
'contentMap': {
'en': content
},
'attachment': [],
'tag': [],
'replies': {}
# 'id': 'https://'+domain+'/users/'+username+'/statuses/'+statusNumber+'/replies',
# 'type': 'Collection',
# 'first': {
# 'type': 'CollectionPage',
# 'partOf': 'https://'+domain+'/users/'+username+'/statuses/'+statusNumber+'/replies',
# 'items': []
# }
#}
}
}
return newPost

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session.py 100644
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__filename__ = "session.py"
__author__ = "Bob Mottram"
__license__ = "AGPL3+"
__version__ = "0.0.1"
__maintainer__ = "Bob Mottram"
__email__ = "bob@freedombone.net"
__status__ = "Production"
import requests
import json
def createSession(onionRoute: bool):
session = requests.session()
if onionRoute:
session.proxies = {}
session.proxies['http'] = 'socks5h://localhost:9050'
session.proxies['https'] = 'socks5h://localhost:9050'
return session
def getJson(session,url: str,headers,params):
sessionParams={}
sessionHeaders={}
if headers:
sessionHeaders=headers
if params:
sessionParams=params
sessionHeaders['User-agent'] = "HotJava/1.1.2 FCS"
session.cookies.clear()
return session.get(url, headers=sessionHeaders, params=sessionParams).json()

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webfinger.py 100644
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__filename__ = "webfinger.py"
__author__ = "Bob Mottram"
__license__ = "AGPL3+"
__version__ = "0.0.1"
__maintainer__ = "Bob Mottram"
__email__ = "bob@freedombone.net"
__status__ = "Production"
import base64
from Crypto.PublicKey import RSA
from Crypto.Util import number
import requests
import json
import commentjson
import os
from session import getJson
def parseHandle(handle):
if '.' not in handle:
return None, None
if '/@' in handle:
domain, username = handle.replace('https://','').replace('http://','').split('/@')
else:
if '/users/' in handle:
domain, username = handle.replace('https://','').replace('http://','').split('/users/')
else:
if '@' in handle:
username, domain = handle.split('@')
else:
return None, None
return username, domain
cachedWebfingers = {}
def webfingerHandle(session,handle: str,https: bool):
username, domain = parseHandle(handle)
if not username:
return None
if cachedWebfingers.get(username+'@'+domain):
return cachedWebfingers[username+'@'+domain]
prefix='https'
if not https:
prefix='http'
url = '{}://{}/.well-known/webfinger'.format(prefix,domain)
par = {'resource': 'acct:{}'.format(username+'@'+domain)}
hdr = {'Accept': 'application/jrd+json'}
#try:
result = getJson(session, url, hdr, par)
#except:
# print("Unable to webfinger " + url)
# return None
cachedWebfingers[username+'@'+domain] = result
return result
def generateMagicKey(publicKeyPem):
"""See magic_key method in
https://github.com/tootsuite/mastodon/blob/707ddf7808f90e3ab042d7642d368c2ce8e95e6f/app/models/account.rb
"""
privkey = RSA.importKey(publicKeyPem)
mod = base64.urlsafe_b64encode(number.long_to_bytes(privkey.n)).decode("utf-8")
pubexp = base64.urlsafe_b64encode(number.long_to_bytes(privkey.e)).decode("utf-8")
return f"data:application/magic-public-key,RSA.{mod}.{pubexp}"
def storeWebfingerEndpoint(username: str,domain: str,wfJson) -> bool:
"""Stores webfinger endpoint for a user to a file
"""
handle=username+'@'+domain
baseDir=os.getcwd()
wfSubdir='/wfendpoints'
if not os.path.isdir(baseDir+wfSubdir):
os.mkdir(baseDir+wfSubdir)
filename=baseDir+wfSubdir+'/'+handle.lower()+'.json'
with open(filename, 'w') as fp:
commentjson.dump(wfJson, fp, indent=4, sort_keys=False)
return True
def createWebfingerEndpoint(username,domain,https,publicKeyPem) -> {}:
"""Creates a webfinger endpoint for a user
"""
prefix='https'
if not https:
prefix='http'
account = {
"aliases": [
prefix+"://"+domain+"/@"+username,
prefix+"://"+domain+"/users/"+username
],
"links": [
{
"href": prefix+"://"+domain+"/@"+username,
"rel": "http://webfinger.net/rel/profile-page",
"type": "text/html"
},
{
"href": prefix+"://"+domain+"/users/"+username+".atom",
"rel": "http://schemas.google.com/g/2010#updates-from",
"type": "application/atom+xml"
},
{
"href": prefix+"://"+domain+"/users/"+username,
"rel": "self",
"type": "application/activity+json"
},
{
"href": prefix+"://"+domain+"/api/salmon/1",
"rel": "salmon"
},
{
"href": generateMagicKey(publicKeyPem),
"rel": "magic-public-key"
},
{
"rel": "http://ostatus.org/schema/1.0/subscribe",
"template": prefix+"://"+domain+"/authorize_interaction?uri={uri}"
}
],
"subject": "acct:"+username+"@"+domain
}
return account
def webfingerMeta() -> str:
"""
"""
return "<?xml version=’1.0' encoding=’UTF-8'?>" \
"<XRD xmlns=’http://docs.oasis-open.org/ns/xri/xrd-1.0'" \
" xmlns:hm=’http://host-meta.net/xrd/1.0'>" \
"" \
"<hm:Host>example.com</hm:Host>" \
"" \
"<Link rel=’lrdd’" \
" template=’http://example.com/describe?uri={uri}'>" \
" <Title>Resource Descriptor</Title>" \
" </Link>" \
"</XRD>"
def webfingerLookup(path: str):
"""Lookup the webfinger endpoint for an account
"""
if not path.startswith('/.well-known/webfinger?'):
return None
handle=None
if 'resource=acct:' in path:
handle=path.split('resource=acct:')[1].strip()
else:
if 'resource=acct%3A' in path:
handle=path.split('resource=acct%3A')[1].replace('%40','@').strip()
if not handle:
return None
if '&' in handle:
handle=handle.split('&')[0].strip()
if '@' not in handle:
return None
baseDir=os.getcwd()
filename=baseDir+'/wfendpoints/'+handle.lower()+'.json'
if not os.path.isfile(filename):
return None
wfJson={"user": "unknown"}
with open(filename, 'r') as fp:
wfJson=commentjson.load(fp)
return wfJson