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cognito_client.py
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cognito_client.py
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import boto3
from warrant.aws_srp import AWSSRP
from cognito_config import config
import time
import ast
class CognitoClient:
def __init__(self):
self.client_id = config.CONFIG_CLIENT_ID
self.pool_id = config.CONFIG_USER_POOL_ID
self.pool_region = config.CONFIG_USER_POOL_REGION
self.keys = None
self.keys_iss = None
def __get_client(self):
return boto3.Session(region_name=self.pool_region).client('cognito-idp')
def __get_result(self, response):
return True if response["ResponseMetadata"]["HTTPStatusCode"] == 200 else False
def __dict_to_cognito(self, attributes, attr_map=None):
if attr_map is None:
attr_map = {}
for k,v in attr_map.items():
if v in attributes.keys():
attributes[k] = attributes.pop(v)
return [{'Name': key, 'Value': value} for key, value in attributes.items()]
def __cognito_to_dict(self, attr_list, attr_map=None):
if attr_map is None:
attr_map = {}
attr_dict = dict()
for a in attr_list:
name = a.get('Name')
value = a.get('Value')
if value in ['true', 'false']:
value = ast.literal_eval(value.capitalize())
name = attr_map.get(name,name)
attr_dict[name] = value
return attr_dict
def __get_userpool_keys(self):
import urllib.request
import json
keys_iss = 'https://cognito-idp.{}.amazonaws.com/{}'.format(config.CONFIG_USER_POOL_REGION, config.CONFIG_USER_POOL_ID)
keys_url = '{}/.well-known/jwks.json'.format(keys_iss)
response = urllib.request.urlopen(keys_url)
keys = json.loads(response.read())['keys']
return keys, keys_iss
def sign_up(self, username, password, **attributes):
params = {
'ClientId' : self.client_id,
'Username' : username,
'Password' : password,
'UserAttributes' : self.__dict_to_cognito(attributes)
}
try:
response = self.__get_client().sign_up(**params)
except:
return (False, None)
return (self.__get_result(response), response)
def confirm_sign_up(self, username, confirmation_code):
params = {
'ClientId' : self.client_id,
'Username' : username,
'ConfirmationCode': confirmation_code
}
try:
response = self.__get_client().confirm_sign_up(**params)
except:
return (False, None)
return (self.__get_result(response), response)
def forgot_password(self, username):
params = {
'ClientId': self.client_id,
'Username': username
}
try:
response = self.__get_client().forgot_password(**params)
except:
return (False, None)
return (self.__get_result(response), response)
def confirm_forgot_password(self, username, confirmation_code, new_password):
params = {
'ClientId' : self.client_id,
'Username' : username,
'ConfirmationCode': confirmation_code,
'Password' : new_password
}
try:
response = self.__get_client().confirm_forgot_password(**params)
except:
return (False, None)
return (self.__get_result(response), response)
def login(self, username, password):
client = self.__get_client()
params = {
'username' : username,
'password' : password,
'pool_id' : self.pool_id,
'client_id' : self.client_id,
'client' : client
}
try:
aws = AWSSRP(**params)
response = aws.authenticate_user()
(self.keys, self.keys_iss) = self.__get_userpool_keys()
except:
return (False, None)
return (self.__get_result(response), response)
def logout(self, access_token):
params = {
'AccessToken': access_token
}
try:
response = self.__get_client().global_sign_out(**params)
except:
return (False, None)
return (self.__get_result(response), response)
def get_user(self, access_token):
params = {
'AccessToken': access_token
}
try:
response = self.__get_client().get_user(**params)
user_attributes = self.__cognito_to_dict(response["UserAttributes"])
user_attributes.pop("sub")
user_attributes.pop("email_verified")
except:
return (False, None)
return (self.__get_result(response), user_attributes)
def update_user(self, access_token, **attributes):
params = {
'AccessToken' : access_token,
'UserAttributes' : self.__dict_to_cognito(attributes)
}
try:
response = self.__get_client().update_user_attributes(**params)
except:
return (False, None)
return (self.__get_result(response), response)
def change_password(self, access_token, password, new_password):
params = {
'PreviousPassword': password,
'ProposedPassword': new_password,
'AccessToken' : access_token
}
try:
response = self.__get_client().change_password(**params)
except:
return (False, None)
return (self.__get_result(response), response)
def verify_token(self, token, username):
from jose import jwk, jwt
from jose.utils import base64url_decode
# get the kid from the headers prior to verification
headers = jwt.get_unverified_header(token)
kid = headers['kid']
# search for the kid in the downloaded public keys
key_index = -1
for i in range(len(self.keys)):
if kid == self.keys[i]['kid']:
key_index = i
break
if key_index == -1:
print('Public key not found in jwks.json')
return False
# construct the public key
public_key = jwk.construct(self.keys[key_index])
# get the last two sections of the token,
# message and signature (encoded in base64)
message, encoded_signature = str(token).rsplit('.', 1)
# decode the signature
decoded_signature = base64url_decode(encoded_signature.encode('utf-8'))
# verify the signature
if not public_key.verify(message.encode("utf8"), decoded_signature):
print('Signature verification failed')
return False
# since we passed the verification, we can now safely
# use the unverified claims
claims = jwt.get_unverified_claims(token)
if claims["token_use"] != "access":
print('Token is not an access token')
return False
curr_time = time.time()
if curr_time > claims["exp"] or curr_time < claims["iat"]:
print('Token is expired')
return False
if claims["client_id"] != config.CONFIG_CLIENT_ID:
print('Token was not issued for this client_id')
return False
if claims["username"] != username:
print('Token was not issued for this username')
return False
if claims['iss'] != self.keys_iss:
print('Token was not issued for this pool_id')
return False
return True
def admin_list_users(self):
attributes = ["email", "given_name", "family_name"]
params = {
'UserPoolId' : self.pool_id,
'AttributesToGet' : attributes
}
try:
response = self.__get_client().list_users(**params)
users = response.copy()
users.pop("ResponseMetadata")
#print(users)
users = users["Users"]
num_users = len(users)
user_list = []
for user in users:
user_attributes = self.__cognito_to_dict(user["Attributes"])
user_attributes["username"] = user["Username"]
user_attributes["creationdate"] = user["UserCreateDate"]
user_attributes["modifieddate"] = user["UserLastModifiedDate"]
user_attributes["enabled"] = user["Enabled"]
user_attributes["status"] = user["UserStatus"]
user_list.append(user_attributes)
except:
return (False, None)
return (self.__get_result(response), user_list)
def admin_display_users(self, users):
print()
if users:
for user in users:
print("username : {}".format(user["username"]))
print(" email : {}".format(user["email"]))
print(" given_name : {}".format(user["given_name"]))
print(" family_name : {}".format(user["family_name"]))
print(" creationdate : {}".format(user["creationdate"]))
print(" modifieddate : {}".format(user["modifieddate"]))
print(" enabled : {}".format(user["enabled"]))
print(" status : {}".format(user["status"]))
print()
def admin_disable_user(self, username):
params = {
'UserPoolId' : self.pool_id,
'Username' : username
}
try:
response = self.__get_client().admin_disable_user(**params)
except:
return (False, None)
return (self.__get_result(response), response)
def admin_enable_user(self, username):
params = {
'UserPoolId' : self.pool_id,
'Username' : username
}
try:
response = self.__get_client().admin_enable_user(**params)
except:
return (False, None)
return (self.__get_result(response), response)
def admin_add_user_to_group(self, username, groupname):
params = {
'UserPoolId' : self.pool_id,
'Username' : username,
'GroupName' : groupname
}
try:
response = self.__get_client().admin_add_user_to_group(**params)
except:
return (False, None)
return (self.__get_result(response), response)
def admin_remove_user_from_group(self, username, groupname):
params = {
'UserPoolId' : self.pool_id,
'Username' : username,
'GroupName' : groupname
}
try:
response = self.__get_client().admin_remove_user_from_group(**params)
except:
return (False, None)
return (self.__get_result(response), response)
def admin_list_groups_for_user(self, username):
params = {
'Username' : username,
'UserPoolId' : self.pool_id
}
try:
response = self.__get_client().admin_list_groups_for_user(**params)
groups = response.copy()
groups.pop("ResponseMetadata")
groups = groups["Groups"]
#print(groups)
num_users = len(groups)
group_list = []
for group in groups:
group_attributes = {}
group_attributes["groupname"] = group["GroupName"]
group_attributes["description"] = group["Description"]
group_attributes["modifieddate"] = group["LastModifiedDate"]
group_attributes["creationdate"] = group["CreationDate"]
group_list.append(group_attributes)
except:
return (False, None)
return (self.__get_result(response), group_list)
def admin_display_groups_for_user(self, groups):
print()
if groups:
for group in groups:
print("groupname : {}".format(group["groupname"]))
print(" description : {}".format(group["description"]))
print(" modifieddate : {}".format(group["modifieddate"]))
print(" creationdate : {}".format(group["creationdate"]))
print()
def admin_logout_user(self, username):
params = {
'UserPoolId': self.pool_id,
'Username' : username
}
try:
response = self.__get_client().admin_user_global_sign_out(**params)
except:
return (False, None)
return (self.__get_result(response), response)
def admin_delete_user(self, username):
params = {
'UserPoolId': self.pool_id,
'Username' : username
}
try:
response = self.__get_client().admin_delete_user(**params)
except:
return (False, None)
return (self.__get_result(response), response)