Fix publish API, add basic client

api/admin.py

@@ -1,3 +1,13 @@
 from django.contrib import admin
+from . import models
 
-# Register your models here.
+
+@admin.register(models.ApiKey)
+class ApiKeyAdmin(admin.ModelAdmin):
+    list_display = ['name', 'last_used', 'displayValue']
+    readonly_fields = ['keyId', 'key', 'last_used', 'displayValue']
+
+    def save_model(self, request, obj, form, change):
+        if not change:
+            obj.initialFill()
+        super(ApiKeyAdmin, self).save_model(request, obj, form, change)

api/client/apiclient.py

@@ -0,0 +1,61 @@
+''' API client for bocal-site '''
+
+import json
+import urllib.request
+import hmac
+import hashlib
+from datetime import datetime
+
+
+def sendReq(url):
+    def send(payload, host):
+        try:
+            req = urllib.request.Request('http://{}/{}'.format(host, url),
+                                         json.dumps(payload).encode('ascii'))
+            req.add_header('Content-Type', 'application/json')
+            handle = urllib.request.urlopen(req)
+            code = handle.getcode()
+            content = handle.read()
+            handle.close()
+            return (code, content.decode('utf-8'))
+        except urllib.error.HTTPError as e:
+            return (e.code, e.read().decode('utf-8'))
+
+    def authentify(apiKey, payload):
+        keyId, key = apiKey.split('$')
+        keyId = int(keyId)
+        time = datetime.now().timestamp()
+        mac = hmac.new(key.encode('utf-8'),
+                       msg=str(int(time)).encode('utf-8'),
+                       digestmod=hashlib.sha256)
+        mac.update(json.dumps(payload).encode('utf-8'))
+
+        auth = {
+            'keyId': keyId,
+            'timestamp': time,
+            'hmac': mac.hexdigest(),
+        }
+
+        return {
+            'auth': auth,
+            'req': payload,
+        }
+
+    def decorator(fct):
+        ''' Decorator. Adds authentication layer. '''
+        def wrap(host, apiKey, *args, **kwargs):
+            innerReq = fct(*args, **kwargs)
+            payload = authentify(apiKey, innerReq)
+            return send(payload, host)
+        return wrap
+
+    return decorator
+
+
+@sendReq(url='api/publish')
+def publish(bocId, url, date):
+    return {
+        'id': bocId,
+        'url': url,
+        'date': date.strftime('%Y-%m-%d'),
+    }

api/migrations/0001_initial.py

@@ -0,0 +1,26 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.5 on 2017-09-24 14:53
+from __future__ import unicode_literals
+
+import datetime
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='ApiKey',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('key', models.CharField(max_length=128, verbose_name='API key')),
+                ('name', models.CharField(help_text='Where is this key used from?', max_length=256, verbose_name='Key name')),
+                ('last_used', models.DateTimeField(default=datetime.datetime(1970, 1, 1, 1, 0), verbose_name='Last used')),
+            ],
+        ),
+    ]

api/models.py

@@ -2,7 +2,8 @@ from django.db import models
 from datetime import datetime, timedelta
 import hmac
 import hashlib
-
+import random
+import string
 
 class ApiKey(models.Model):
     ''' An API key, to login using the API
@@ -11,10 +12,11 @@ class ApiKey(models.Model):
         containing any dollar ($) sign. It is saved on the client's machine as
         a string "keyId$key".
         An API token (to authentify a request) is a triplet (ts, kid, hmac) of
-        a timestamp `ts`, the key id `kid` and hmac = `HMAC(key, ts, sha256)`.
+        a timestamp `ts`, the key id `kid` and
+            hmac = `HMAC(key, ts + data, sha256)`
+        where `data` is the normalized (`json.dumps(json.loads(...))`) value of
+        the data part of the request.
     '''
-    keyId = models.IntegerField("API key id",
-                                primary_key=True)
     key = models.CharField("API key",
                            max_length=128)
     name = models.CharField("Key name",
@@ -26,16 +28,31 @@ class ApiKey(models.Model):
     def everUsed(self):
         return self.last_used > datetime.fromtimestamp(0)
 
-    def __str__(self):
+    def initialFill(self):
+        if not self.key:
+            KEY_SIZE = 64
+            KEY_CHARS = string.ascii_letters + string.digits
+            self.key = ''.join(random.choices(KEY_CHARS, k=KEY_SIZE))
+
+    @property
+    def keyId(self):
+        return self.id
+
+    @property
+    def displayValue(self):
         return "{}${}".format(self.keyId, self.key)
 
-    def isCorrect(self, timestamp, inpMac):
+    def __str__(self):
+        return self.displayValue
+
+    def isCorrect(self, timestamp, inpMac, data):
         claimedDate = datetime.fromtimestamp(timestamp)
         if datetime.now() - timedelta(minutes=5) > claimedDate:
             return False
 
-        mac = hmac.new(self.key,
-                       msg=int(claimedDate.timestamp()),
+        mac = hmac.new(self.key.encode('utf-8'),
+                       msg=str(int(claimedDate.timestamp())).encode('utf-8'),
                        digestmod=hashlib.sha256)
+        mac.update(data.encode('utf-8'))
 
         return hmac.compare_digest(mac.hexdigest(), inpMac)

api/urls.py

@@ -4,4 +4,5 @@ from . import views
 app_name = 'manisite'
 
 urlpatterns = [
+    url(r'^publish$', views.publishApiView),
 ]

api/views.py

@@ -1,5 +1,6 @@
 from django.http import response
 from django.core.exceptions import ValidationError
+from django.views.decorators.csrf import csrf_exempt
 import json
 import datetime
 
@@ -7,7 +8,7 @@ from . import models
 import mainsite.models as mainModels
 
 
-def authentify(data):
+def authentify(data, payload):
     ''' returns whether the request's authentification is correct '''
     required = ['keyId', 'timestamp', 'hmac']
     for field in required:
@@ -15,15 +16,18 @@ def authentify(data):
             return response.HttpResponseForbidden(
                 'Missing required field "{}"'.format(field))
     try:
-        key = models.ApiKey.objects.get(keyId=data['keyId'])
+        key = models.ApiKey.objects.get(id=data['keyId'])
     except models.ApiKey.DoesNotExist:
-        response.HttpResponseForbidden('Bad authentication')
+        return response.HttpResponseForbidden('Bad authentication')
 
-    if not key.isCorrect(data['timestamp'], data['hmac']):
-        response.HttpResponseForbidden('Bad authentication')
+    normPayload = json.dumps(payload)
+    if not key.isCorrect(data['timestamp'], data['hmac'], normPayload):
+        return response.HttpResponseForbidden('Bad authentication')
 
 
-def apiView(fct, required=[]):
+def apiView(required=[]):
+    def decorator(fct):
+        @csrf_exempt
         def wrap(request, *args, **kwargs):
             try:
                 data = json.loads(request.body)
@@ -41,12 +45,13 @@ def apiView(fct, required=[]):
                     return response.HttpResponseBadRequest(
                         "Missing field {}".format(field))
 
-        authVal = authentify(authData)
+            authVal = authentify(authData, reqData)
             if authVal is not None:
                 return authVal
 
             return fct(request, reqData, *args, **kwargs)
         return wrap
+    return decorator
 
 
 @apiView(required=["id", "url", "date"])