1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
|
import base64
import json
import string
from cryptography.hazmat.primitives import hashes
from django import forms
from django.conf import settings
from django.contrib.auth.decorators import login_required
from django.http import Http404, HttpResponseBadRequest, JsonResponse
from django.shortcuts import redirect
from django.utils.decorators import method_decorator
from django.views.decorators.csrf import csrf_exempt
from django.views.generic import FormView, TemplateView, View
from core.forms import FormHelper
from core.ld import canonicalise
from miniq.models import Task
from users.models import Identity
from users.shortcuts import by_handle_or_404
class ViewIdentity(TemplateView):
template_name = "identity/view.html"
def get_context_data(self, handle):
identity = Identity.by_handle(handle=handle)
statuses = identity.statuses.all()[:100]
if identity.data_age > settings.IDENTITY_MAX_AGE:
Task.submit("identity_fetch", identity.handle)
return {
"identity": identity,
"statuses": statuses,
}
@method_decorator(login_required, name="dispatch")
class SelectIdentity(TemplateView):
template_name = "identity/select.html"
def get_context_data(self):
return {
"identities": Identity.objects.filter(users__pk=self.request.user.pk),
}
@method_decorator(login_required, name="dispatch")
class ActivateIdentity(View):
def get(self, request, handle):
identity = by_handle_or_404(request, handle)
if not identity.users.filter(pk=request.user.pk).exists():
raise Http404()
request.session["identity_id"] = identity.id
# Get next URL, not allowing offsite links
next = request.GET.get("next") or "/"
if ":" in next:
next = "/"
return redirect("/")
@method_decorator(login_required, name="dispatch")
class CreateIdentity(FormView):
template_name = "identity/create.html"
class form_class(forms.Form):
handle = forms.CharField()
name = forms.CharField()
helper = FormHelper(submit_text="Create")
def clean_handle(self):
# Remove any leading @
value = self.cleaned_data["handle"].lstrip("@")
# Validate it's all ascii characters
for character in value:
if character not in string.ascii_letters + string.digits + "_-":
raise forms.ValidationError(
"Only the letters a-z, numbers 0-9, dashes and underscores are allowed."
)
# Don't allow custom domains here quite yet
if "@" in value:
raise forms.ValidationError(
"You are not allowed an @ sign in your handle."
)
# Ensure there is a domain on the end
if "@" not in value:
value += "@" + settings.DEFAULT_DOMAIN
# Check for existing users
if Identity.objects.filter(handle=value).exists():
raise forms.ValidationError("This handle is already taken")
return value
def form_valid(self, form):
new_identity = Identity.objects.create(
handle=form.cleaned_data["handle"],
name=form.cleaned_data["name"],
local=True,
)
new_identity.users.add(self.request.user)
new_identity.generate_keypair()
return redirect(new_identity.urls.view)
class Actor(View):
"""
Returns the AP Actor object
"""
def get(self, request, handle):
identity = by_handle_or_404(self.request, handle)
return JsonResponse(
{
"@context": [
"https://www.w3.org/ns/activitystreams",
"https://w3id.org/security/v1",
],
"id": f"https://{settings.DEFAULT_DOMAIN}{identity.urls.actor}",
"type": "Person",
"preferredUsername": identity.short_handle,
"inbox": f"https://{settings.DEFAULT_DOMAIN}{identity.urls.inbox}",
"publicKey": {
"id": f"https://{settings.DEFAULT_DOMAIN}{identity.urls.actor}#main-key",
"owner": f"https://{settings.DEFAULT_DOMAIN}{identity.urls.actor}",
"publicKeyPem": identity.public_key,
},
}
)
@method_decorator(csrf_exempt, name="dispatch")
class Inbox(View):
"""
AP Inbox endpoint
"""
def post(self, request, handle):
if "HTTP_SIGNATURE" not in request.META:
print("No signature")
return HttpResponseBadRequest()
# Split apart signature
signature_details = {}
for item in request.META["HTTP_SIGNATURE"].split(","):
name, value = item.split("=", 1)
value = value.strip('"')
signature_details[name] = value
# Reject unknown algorithms
if signature_details["algorithm"] != "rsa-sha256":
print("Unknown algorithm")
return HttpResponseBadRequest()
# Calculate body digest
if "HTTP_DIGEST" in request.META:
digest = hashes.Hash(hashes.SHA256())
digest.update(request.body)
digest_header = "SHA-256=" + base64.b64encode(digest.finalize()).decode(
"ascii"
)
if request.META["HTTP_DIGEST"] != digest_header:
print("Bad digest")
return HttpResponseBadRequest()
# Create the signature payload
headers = {}
for header_name in signature_details["headers"].split():
if header_name == "(request-target)":
value = f"post {request.path}"
elif header_name == "content-type":
value = request.META["CONTENT_TYPE"]
else:
value = request.META[f"HTTP_{header_name.upper()}"]
headers[header_name] = value
signed_string = "\n".join(f"{name}: {value}" for name, value in headers.items())
# Load the LD
document = canonicalise(json.loads(request.body))
print(document)
# Find the Identity by the actor on the incoming item
identity = Identity.by_actor_uri(document["actor"])
if not identity.verify_signature(signature_details["signature"], signed_string):
print("Bad signature")
return HttpResponseBadRequest()
return JsonResponse({"status": "OK"})
class Webfinger(View):
"""
Services webfinger requests
"""
def get(self, request):
resource = request.GET.get("resource")
if not resource.startswith("acct:"):
raise Http404("Not an account resource")
handle = resource[5:]
identity = by_handle_or_404(request, handle)
return JsonResponse(
{
"subject": f"acct:{identity.handle}",
"aliases": [
f"https://{settings.DEFAULT_DOMAIN}/@{identity.short_handle}",
],
"links": [
{
"rel": "http://webfinger.net/rel/profile-page",
"type": "text/html",
"href": f"https://{settings.DEFAULT_DOMAIN}{identity.urls.view}",
},
{
"rel": "self",
"type": "application/activity+json",
"href": f"https://{settings.DEFAULT_DOMAIN}{identity.urls.actor}",
},
],
}
)
|
