IdHub/idhub/models.py

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Python
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import json
import ujson
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import pytz
import hashlib
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import datetime
from collections import OrderedDict
from django.db import models
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from django.conf import settings
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from django.core.cache import cache
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from django.template.loader import get_template
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from django.utils.translation import gettext_lazy as _
from nacl import secret
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from utils.idhub_ssikit import (
generate_did_controller_key,
keydid_from_controller_key,
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sign_credential,
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webdid_from_controller_key,
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)
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from idhub_auth.models import User
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class Event(models.Model):
class Types(models.IntegerChoices):
EV_USR_REGISTERED = 1, "User registered"
EV_USR_WELCOME = 2, "User welcomed"
EV_DATA_UPDATE_REQUESTED_BY_USER = 3, "Data update requested by user"
EV_DATA_UPDATE_REQUESTED = 4, "Data update requested. Pending approval by administrator"
EV_USR_UPDATED_BY_ADMIN = 5, "User's data updated by admin"
EV_USR_UPDATED = 6, "Your data updated by admin"
EV_USR_DELETED_BY_ADMIN = 7, "User deactivated by admin"
EV_DID_CREATED_BY_USER = 8, "DID created by user"
EV_DID_CREATED = 9, "DID created"
EV_DID_DELETED = 10, "DID deleted"
EV_CREDENTIAL_DELETED_BY_USER = 11, "Credential deleted by user"
EV_CREDENTIAL_DELETED = 12, "Credential deleted"
EV_CREDENTIAL_ISSUED_FOR_USER = 13, "Credential issued for user"
EV_CREDENTIAL_ISSUED = 14, "Credential issued"
EV_CREDENTIAL_PRESENTED_BY_USER = 15, "Credential presented by user"
EV_CREDENTIAL_PRESENTED = 16, "Credential presented"
EV_CREDENTIAL_ENABLED = 17, "Credential enabled"
EV_CREDENTIAL_CAN_BE_REQUESTED = 18, "Credential available"
EV_CREDENTIAL_REVOKED_BY_ADMIN = 19, "Credential revoked by admin"
EV_CREDENTIAL_REVOKED = 20, "Credential revoked"
EV_ROLE_CREATED_BY_ADMIN = 21, "Role created by admin"
EV_ROLE_MODIFIED_BY_ADMIN = 22, "Role modified by admin"
EV_ROLE_DELETED_BY_ADMIN = 23, "Role deleted by admin"
EV_SERVICE_CREATED_BY_ADMIN = 24, "Service created by admin"
EV_SERVICE_MODIFIED_BY_ADMIN = 25, "Service modified by admin"
EV_SERVICE_DELETED_BY_ADMIN = 26, "Service deleted by admin"
EV_ORG_DID_CREATED_BY_ADMIN = 27, "Organisational DID created by admin"
EV_ORG_DID_DELETED_BY_ADMIN = 28, "Organisational DID deleted by admin"
EV_USR_DEACTIVATED_BY_ADMIN = 29, "User deactivated"
EV_USR_ACTIVATED_BY_ADMIN = 30, "User activated"
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created = models.DateTimeField(_("Date"), auto_now=True)
message = models.CharField(_("Description"), max_length=350)
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type = models.PositiveSmallIntegerField(
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_("Event"),
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choices=Types.choices,
)
user = models.ForeignKey(
User,
on_delete=models.CASCADE,
related_name='events',
null=True,
)
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def get_type_name(self):
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return self.Types(self.type).label
@classmethod
def set_EV_USR_REGISTERED(cls, user):
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msg = _("The user {username} was registered: name: {first_name}, last name: {last_name}").format(
username=user.username,
first_name=user.first_name,
last_name=user.last_name
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)
cls.objects.create(
type=cls.Types.EV_USR_REGISTERED,
message=msg
)
@classmethod
def set_EV_USR_WELCOME(cls, user):
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msg = _("Welcome. You has been registered: name: {first_name}, last name: {last_name}").format(
first_name=user.first_name,
last_name=user.last_name
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)
cls.objects.create(
type=cls.Types.EV_USR_WELCOME,
message=msg,
user=user
)
# Is required?
@classmethod
def set_EV_DATA_UPDATE_REQUESTED_BY_USER(cls, user):
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msg = _("The user '{username}' has request the update of the following information: ")
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msg += "['field1':'value1', 'field2':'value2'>,...]".format(
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username=user.username,
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)
cls.objects.create(
type=cls.Types.EV_DATA_UPDATE_REQUESTED_BY_USER,
message=msg,
)
# Is required?
@classmethod
def set_EV_DATA_UPDATE_REQUESTED(cls, user):
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msg = _("You have requested the update of the following information: ")
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msg += "['field1':'value1', 'field2':'value2'>,...]"
cls.objects.create(
type=cls.Types.EV_DATA_UPDATE_REQUESTED,
message=msg,
user=user
)
@classmethod
def set_EV_USR_UPDATED_BY_ADMIN(cls, user):
msg = "The admin has updated the following user 's information: "
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msg += "name: {first_name}, last name: {last_name}"
msg = _(msg).format(
first_name=user.first_name,
last_name=user.last_name
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)
cls.objects.create(
type=cls.Types.EV_USR_UPDATED_BY_ADMIN,
message=msg
)
@classmethod
def set_EV_USR_UPDATED(cls, user):
msg = "The admin has updated your personal information: "
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msg += "name: {first_name}, last name: {last_name}"
msg = _(msg).format(
first_name=user.first_name,
last_name=user.last_name
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)
cls.objects.create(
type=cls.Types.EV_USR_UPDATED,
message=msg,
user=user
)
@classmethod
def set_EV_USR_DELETED_BY_ADMIN(cls, user):
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msg = _("The admin has deleted the user: username: {username}").format(
username=user.username,
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)
cls.objects.create(
type=cls.Types.EV_USR_DELETED_BY_ADMIN,
message=msg
)
@classmethod
def set_EV_DID_CREATED_BY_USER(cls, did):
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msg = _("New DID with DID-ID: '{did}' created by user '{username}'").format(
did=did.did,
username=did.user.username
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)
cls.objects.create(
type=cls.Types.EV_DID_CREATED_BY_USER,
message=msg,
)
@classmethod
def set_EV_DID_CREATED(cls, did):
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msg = _("New DID with label: '{label}' and DID-ID: '{did}' was created'").format(
label=did.label,
did=did.did
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)
cls.objects.create(
type=cls.Types.EV_DID_CREATED,
message=msg,
user=did.user
)
@classmethod
def set_EV_DID_DELETED(cls, did):
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msg = _("The DID with label '{label}' and DID-ID: '{did}' was deleted from your wallet").format(
label=did.label,
did=did.did
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)
cls.objects.create(
type=cls.Types.EV_DID_DELETED,
message=msg,
user=did.user
)
@classmethod
def set_EV_CREDENTIAL_DELETED_BY_ADMIN(cls, cred):
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msg = _("The credential of type '{type}' and ID: '{id}' was deleted").format(
type=cred.type(),
id=cred.id,
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)
cls.objects.create(
type=cls.Types.EV_CREDENTIAL_DELETED_BY_ADMIN,
message=msg,
)
@classmethod
def set_EV_CREDENTIAL_DELETED(cls, cred):
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msg = _("The credential of type '{type}' and ID: '{id}' was deleted from your wallet").format(
type=cred.type(),
id=cred.id
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)
cls.objects.create(
type=cls.Types.EV_CREDENTIAL_DELETED,
message=msg,
user=cred.user
)
@classmethod
def set_EV_CREDENTIAL_ISSUED_FOR_USER(cls, cred):
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msg = _("The credential of type '{type}' and ID: '{id}' was issued for user {username}").format(
type=cred.type(),
id=cred.id,
username=cred.user.username
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)
cls.objects.create(
type=cls.Types.EV_CREDENTIAL_ISSUED_FOR_USER,
message=msg,
)
@classmethod
def set_EV_CREDENTIAL_ISSUED(cls, cred):
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msg = _("The credential of type '{type}' and ID: '{id}' was issued and stored in your wallet").format(
type=cred.type(),
id=cred.id
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)
cls.objects.create(
type=cls.Types.EV_CREDENTIAL_ISSUED,
message=msg,
user=cred.user
)
@classmethod
def set_EV_CREDENTIAL_PRESENTED_BY_USER(cls, cred, verifier):
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msg = "The credential of type '{type}' and ID: '{id}' "
msg += "was presented by user {username} to verifier '{verifier}"
msg = _(msg).format(
type=cred.type(),
id=cred.id,
username=cred.user.username,
verifier=verifier
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)
cls.objects.create(
type=cls.Types.EV_CREDENTIAL_PRESENTED_BY_USER,
message=msg,
)
@classmethod
def set_EV_CREDENTIAL_PRESENTED(cls, cred, verifier):
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msg = "The credential of type '{type}' and ID: '{id}' "
msg += "was presented to verifier '{verifier}'"
msg = _(msg).format(
type=cred.type(),
id=cred.id,
verifier=verifier
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)
cls.objects.create(
type=cls.Types.EV_CREDENTIAL_PRESENTED,
message=msg,
user=cred.user
)
@classmethod
def set_EV_CREDENTIAL_ENABLED(cls, cred):
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msg = _("The credential of type '{type}' was enabled for user {username}").format(
type=cred.type(),
username=cred.user.username
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)
cls.objects.create(
type=cls.Types.EV_CREDENTIAL_ENABLED,
message=msg,
)
@classmethod
def set_EV_CREDENTIAL_CAN_BE_REQUESTED(cls, cred):
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msg = _("You can request the '{type}' credential").format(
type=cred.type()
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)
cls.objects.create(
type=cls.Types.EV_CREDENTIAL_CAN_BE_REQUESTED,
message=msg,
user=cred.user
)
@classmethod
def set_EV_CREDENTIAL_REVOKED_BY_ADMIN(cls, cred):
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msg = _("The credential of type '{type}' and ID: '{id}' was revoked for ").format(
type=cred.type(),
id=cred.id
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)
cls.objects.create(
type=cls.Types.EV_CREDENTIAL_REVOKED_BY_ADMIN,
message=msg,
)
@classmethod
def set_EV_CREDENTIAL_REVOKED(cls, cred):
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msg = _("The credential of type '{type}' and ID: '{id}' was revoked by admin").format(
type=cred.type(),
id=cred.id
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)
cls.objects.create(
type=cls.Types.EV_CREDENTIAL_REVOKED,
message=msg,
user=cred.user
)
@classmethod
def set_EV_ROLE_CREATED_BY_ADMIN(cls):
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msg = _('A new role was created by admin')
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cls.objects.create(
type=cls.Types.EV_ROLE_CREATED_BY_ADMIN,
message=msg,
)
@classmethod
def set_EV_ROLE_MODIFIED_BY_ADMIN(cls):
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msg = _('The role was modified by admin')
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cls.objects.create(
type=cls.Types.EV_ROLE_MODIFIED_BY_ADMIN,
message=msg,
)
@classmethod
def set_EV_ROLE_DELETED_BY_ADMIN(cls):
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msg = _('The role was removed by admin')
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cls.objects.create(
type=cls.Types.EV_ROLE_DELETED_BY_ADMIN,
message=msg,
)
@classmethod
def set_EV_SERVICE_CREATED_BY_ADMIN(cls):
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msg = _('A new service was created by admin')
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cls.objects.create(
type=cls.Types.EV_SERVICE_CREATED_BY_ADMIN,
message=msg,
)
@classmethod
def set_EV_SERVICE_MODIFIED_BY_ADMIN(cls):
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msg = _('The service was modified by admin')
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cls.objects.create(
type=cls.Types.EV_SERVICE_MODIFIED_BY_ADMIN,
message=msg,
)
@classmethod
def set_EV_SERVICE_DELETED_BY_ADMIN(cls):
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msg = _('The service was removed by admin')
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cls.objects.create(
type=cls.Types.EV_SERVICE_DELETED_BY_ADMIN,
message=msg,
)
@classmethod
def set_EV_ORG_DID_CREATED_BY_ADMIN(cls, did):
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msg = _("New Organisational DID with label: '{label}' and DID-ID: '{did}' was created").format(
label=did.label,
did=did.did
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)
cls.objects.create(
type=cls.Types.EV_ORG_DID_CREATED_BY_ADMIN,
message=msg,
)
@classmethod
def set_EV_ORG_DID_DELETED_BY_ADMIN(cls, did):
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msg = _("Organisational DID with label: '{label}' and DID-ID: '{did}' was removed").format(
label=did.label,
did=did.did
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)
cls.objects.create(
type=cls.Types.EV_ORG_DID_DELETED_BY_ADMIN,
message=msg,
)
@classmethod
def set_EV_USR_DEACTIVATED_BY_ADMIN(cls, user):
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msg = "The user '{username}' was temporarily deactivated: "
msg += "[name:'{first_name}', last name:'{last_name}']"
msg = _(msg).format(
username=user.username,
first_name=user.first_name,
last_name=user.last_name
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)
cls.objects.create(
type=cls.Types.EV_USR_DEACTIVATED_BY_ADMIN,
message=msg,
)
@classmethod
def set_EV_USR_ACTIVATED_BY_ADMIN(cls, user):
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msg = "The user '{username}' was activated: "
msg += "name:'{first_name}', last name:'{last_name}']"
msg = _(msg).format(
username=user.username,
first_name=user.first_name,
last_name=user.last_name
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)
cls.objects.create(
type=cls.Types.EV_USR_ACTIVATED_BY_ADMIN,
message=msg,
)
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class DID(models.Model):
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class Types(models.IntegerChoices):
KEY = 1, "Key"
WEB = 2, "Web"
type = models.PositiveSmallIntegerField(
_("Type"),
choices=Types.choices,
)
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created_at = models.DateTimeField(auto_now=True)
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label = models.CharField(_("Label"), max_length=50)
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did = models.CharField(max_length=250)
# In JWK format. Must be stored as-is and passed whole to library functions.
# Example key material:
# '{"kty":"OKP","crv":"Ed25519","x":"oB2cPGFx5FX4dtS1Rtep8ac6B__61HAP_RtSzJdPxqs","d":"OJw80T1CtcqV0hUcZdcI-vYNBN1dlubrLaJa0_se_gU"}'
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key_material = models.TextField()
eidas1 = models.BooleanField(default=False)
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user = models.ForeignKey(
User,
on_delete=models.CASCADE,
related_name='dids',
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null=True,
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)
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didweb_document = models.TextField()
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def get_key_material(self, password):
return self.user.decrypt_data(self.key_material, password)
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def set_key_material(self, value, password):
self.key_material = self.user.encrypt_data(value, password)
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@property
def is_organization_did(self):
if not self.user:
return True
return False
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def set_did(self, password):
new_key_material = generate_did_controller_key()
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self.set_key_material(new_key_material, password)
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if self.type == self.Types.KEY:
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self.did = keydid_from_controller_key(new_key_material)
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elif self.type == self.Types.WEB:
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didurl, document = webdid_from_controller_key(new_key_material)
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self.did = didurl
self.didweb_document = document
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def get_key(self):
return json.loads(self.key_material)
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class Schemas(models.Model):
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type = models.CharField(max_length=250)
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file_schema = models.CharField(max_length=250)
data = models.TextField()
created_at = models.DateTimeField(auto_now=True)
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@property
def get_schema(self):
if not self.data:
return {}
return json.loads(self.data)
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def name(self, request=None):
names = {}
for name in self.get_schema.get('name', []):
lang = name.get('lang')
if 'ca' in lang:
lang = 'ca'
names[lang]= name.get('value')
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if request and request.LANGUAGE_CODE in names.keys():
return names[request.LANGUAGE_CODE]
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return names[settings.LANGUAGE_CODE]
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def description(self):
return self.get_schema.get('description', '')
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class VerificableCredential(models.Model):
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"""
Definition of Verificable Credentials
"""
class Status(models.IntegerChoices):
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ENABLED = 1, _("Enabled")
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ISSUED = 2, _("Issued")
REVOKED = 3, _("Revoked")
EXPIRED = 4, _("Expired")
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id_string = models.CharField(max_length=250)
verified = models.BooleanField()
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created_on = models.DateTimeField(auto_now=True)
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issued_on = models.DateTimeField(null=True)
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data = models.TextField()
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csv_data = models.TextField()
hash = models.CharField(max_length=260)
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status = models.PositiveSmallIntegerField(
choices=Status.choices,
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default=Status.ENABLED
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)
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user = models.ForeignKey(
User,
on_delete=models.CASCADE,
related_name='vcredentials',
)
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subject_did = models.ForeignKey(
DID,
on_delete=models.CASCADE,
related_name='subject_credentials',
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null=True
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)
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issuer_did = models.ForeignKey(
DID,
on_delete=models.CASCADE,
related_name='vcredentials',
)
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eidas1_did = models.ForeignKey(
DID,
on_delete=models.CASCADE,
null=True
)
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schema = models.ForeignKey(
Schemas,
on_delete=models.CASCADE,
related_name='vcredentials',
)
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def get_data(self, password):
if not self.data:
return ""
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if self.eidas1_did:
return self.data
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return self.user.decrypt_data(self.data, password)
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def set_data(self, value, password):
self.data = self.user.encrypt_data(value, password)
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def type(self):
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return self.schema.type
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def description(self):
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for des in json.loads(self.render("")).get('description', []):
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if settings.LANGUAGE_CODE in des.get('lang'):
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return des.get('value', '')
return ''
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def get_type(self, lang=None):
schema = json.loads(self.schema.data)
if not schema.get('name'):
return ''
try:
for x in schema['name']:
if lang or settings.LANGUAGE_CODE in x['lang']:
return x.get('value', '')
except:
return self.schema.type
return ''
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def get_status(self):
return self.Status(self.status).label
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def get_datas(self):
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data = json.loads(self.csv_data).items()
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return data
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def issue(self, did, password, domain=settings.DOMAIN.strip("/")):
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if self.status == self.Status.ISSUED:
return
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self.status = self.Status.ISSUED
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self.subject_did = did
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self.issued_on = datetime.datetime.now().astimezone(pytz.utc)
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issuer_pass = cache.get("KEY_DIDS")
# issuer_pass = self.user.decrypt_data(
# cache.get("KEY_DIDS"),
# settings.SECRET_KEY,
# )
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data = sign_credential(
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self.render(domain),
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self.issuer_did.get_key_material(issuer_pass)
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)
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if self.eidas1_did:
self.data = data
self.hash = hashlib.sha3_256(self.data.encode()).hexdigest()
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else:
self.data = self.user.encrypt_data(data, password)
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def get_context(self, domain):
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d = json.loads(self.csv_data)
issuance_date = ''
if self.issued_on:
format = "%Y-%m-%dT%H:%M:%SZ"
issuance_date = self.issued_on.strftime(format)
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cred_path = 'credentials'
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if self.eidas1_did:
cred_path = 'public/credentials'
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url_id = "{}/{}/{}".format(
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domain,
cred_path,
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self.id
)
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context = {
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'vc_id': url_id,
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'issuer_did': self.issuer_did.did,
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'subject_did': self.subject_did and self.subject_did.did or '',
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'issuance_date': issuance_date,
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'firstName': self.user.first_name or "",
'lastName': self.user.last_name or "",
'email': self.user.email,
'organisation': settings.ORGANIZATION or '',
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}
context.update(d)
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context['firstName'] = ""
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return context
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def render(self, domain):
context = self.get_context(domain)
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template_name = 'credentials/{}'.format(
self.schema.file_schema
)
tmpl = get_template(template_name)
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d_ordered = ujson.loads(tmpl.render(context))
d_minimum = self.filter_dict(d_ordered)
return ujson.dumps(d_minimum)
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def get_issued_on(self):
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if self.issued_on:
return self.issued_on.strftime("%m/%d/%Y")
return ''
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def filter_dict(self, dic):
new_dict = OrderedDict()
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for key, value in dic.items():
if isinstance(value, dict):
new_value = self.filter_dict(value)
if new_value:
new_dict[key] = new_value
elif value:
new_dict[key] = value
return new_dict
class VCTemplate(models.Model):
wkit_template_id = models.CharField(max_length=250)
data = models.TextField()
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class File_datas(models.Model):
file_name = models.CharField(max_length=250)
success = models.BooleanField(default=True)
created_at = models.DateTimeField(auto_now=True)
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class Membership(models.Model):
"""
This model represent the relation of this user with the ecosystem.
"""
class Types(models.IntegerChoices):
BENEFICIARY = 1, _('Beneficiary')
EMPLOYEE = 2, _('Employee')
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MEMBER = 3, _('Member')
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type = models.PositiveSmallIntegerField(_('Type of membership'), choices=Types.choices)
start_date = models.DateField(
_('Start date'),
help_text=_('What date did the membership start?'),
blank=True,
null=True
)
end_date = models.DateField(
_('End date'),
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help_text=_('What date will the membership end?'),
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blank=True,
null=True
)
user = models.ForeignKey(
User,
on_delete=models.CASCADE,
related_name='memberships',
)
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def get_type(self):
return dict(self.Types.choices).get(self.type)
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class Rol(models.Model):
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name = models.CharField(_("name"), max_length=250)
description = models.CharField(_("Description"), max_length=250, null=True)
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def __str__(self):
return self.name
class Service(models.Model):
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domain = models.CharField(_("Domain"), max_length=250)
description = models.CharField(_("Description"), max_length=250)
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rol = models.ManyToManyField(
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Rol,
)
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def get_roles(self):
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if self.rol.exists():
return ", ".join([x.name for x in self.rol.all()])
return _("None")
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def __str__(self):
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return "{} -> {}".format(self.domain, self.get_roles())
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class UserRol(models.Model):
user = models.ForeignKey(
User,
on_delete=models.CASCADE,
related_name='roles',
)
service = models.ForeignKey(
Service,
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verbose_name=_("Service"),
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on_delete=models.CASCADE,
related_name='users',
)
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class Meta:
unique_together = ('user', 'service',)