def check_password(login, password):
"""Checks provided credentials against database or system user.
:param str login: login username
:param str password: cleartext password
:return: bool
"""
check_login_attempt(login)
is_verified = False
try:
user = db.session.query(Principal).filter_by(login=login).one()
if user.is_root:
is_verified = check_system_login(user.login, password)
else:
salt, pass_hash = user.password_hash.split(':')
computed = KDF.PBKDF2(password,
salt,
dkLen=DK_LEN,
count=HASH_ROUNDS).encode('hex')
if computed == pass_hash:
is_verified = True
except NoResultFound:
LOG.error("User not found with login: %s", login)
# simulate a password check anyway
KDF.PBKDF2(password, 'salt', dkLen=DK_LEN,
count=HASH_ROUNDS).encode('hex')
if not is_verified:
log_failed_login_attempt(login)
return is_verified
def set_passphrase(self, passphrase):
"""Set a user defined passphrase to override the AES and HMAC keys"""
self.passphrase = passphrase
self.aes_key = KDF.PBKDF2(passphrase, dconfig.aes_salt.decode("hex"),
32)
self.mac_key = KDF.PBKDF2(passphrase, dconfig.mac_salt.decode("hex"),
64)
def decode_url(self, url):
"""Takes a URL, and returns the cryptographic nonce. Use PBKDF2 with our
nonce and our salts to return the file name, AES key, and MAC key.
keyword arguments:
url -- the url after the FQDN provided by the client"""
self.url = url
url = url + "==" # add the padding back
try:
self.nonce = base64.urlsafe_b64decode(url.encode("utf-8"))
except:
url = "errormessage=="
self.nonce = base64.urlsafe_b64decode(url.encode("utf-8"))
self.f_key = KDF.PBKDF2(self.nonce, dconfig.nonce_salt.decode("hex"),
16)
self.aes_key = KDF.PBKDF2(self.nonce, dconfig.aes_salt.decode("hex"),
32)
self.mac_key = KDF.PBKDF2(self.nonce, dconfig.mac_salt.decode("hex"),
64)
duress = KDF.PBKDF2(self.nonce, dconfig.duress_salt.decode("hex"), 16)
self.dkey = base64.urlsafe_b64encode(duress)[:22]
self.fname = base64.urlsafe_b64encode(self.f_key)[:22]
def get_key(self):
"""
:return:
"""
key = KDF.PBKDF2(password=self.password, salt=self.salt, count=100000, dkLen=self.lenght_of_key)
return key
def main_loop():
pw_hashed = None
pw = ''
print('If you forget the password, all shards that are stored on your')
print('server will be lost forever.')
while pw == '':
try:
pw = getpass.getpass('Enter the password for Natural ' \
+ 'Message shard encryption: ')
except KeyboardInterrupt:
print() # move to a new output line
return (None)
# The salt is set to zero so that I get the same
# output every time that I run this because I will
# use the output here as the password later.
# This routine is based on the one in RNCryptor (with
# the salt modified):
print('Please wait while the password is being hashed.')
print('You will be prompted to verify the results...')
pw_hashed = KDF.PBKDF2(
pw,
b'00',
dkLen=32,
count=iterations,
prf=lambda p, s: hmac.new(p, s, hashlib.sha256).digest())
return pw_hashed
def __derive_key(self):
""" Generates derived key using stored config """
return KDF.PBKDF2(
self.app_uuid + self.config[self.name]['UUID'],
self.config[self.name]['salt'].encode('utf-8'),
dkLen=32, #32 bytes = 256 bits, max AES key length
count=self.config[self.name]['iterations'])
def _pbkdf2(self, password, salt, iterations=10000, key_length=32):
return KDF.PBKDF2(
password,
salt,
dkLen=key_length,
count=iterations,
prf=lambda p, s: hmac.new(p, s, hashlib.sha1).digest())
def derive_keys(masterPassoword: str, salt: bytes,
iterations: int) -> DerivedKeys:
"""
In OPVault format, the key derivation parameters, except Master Password,
are all in 'profile'. In iCloud/Dropbox synced format, the profile is stored
as `profile.js` as a json object. In MacOS local format, the profile is a
table in a SQLite database called 'OnePassword.sqlite', usually located at
~/Library/Group Containers/2BUA8C4S2C.com.agilebits/Library/Application Support/1Password/Data.
Because we don't use 2skd in OpVault, here it is fairly simple.
The algorithm used here is PBKDF2-HMAC-SHA512, with the plain
'salt' in profile. See https://support.1password.com/opvault-design/#key-derivation
for more information.
The derived cryptoKey and hmacKey are used to encrypt/decrypt
and hmac-authenticate masterKey and overviewKey in profile.
input:
masterpassword: the user entered master password string
salt: the base64 encoded string directly from profile.js.
Thus it need to be decoded here
"""
# encode master password as a utf-8 null terminated string.
mp = (masterPassoword + '\0').encode('utf-8')
# decode the salt into bytes
dk = KDF.PBKDF2(password=mp,
salt=salt,
dkLen=64,
count=iterations,
prf=hmac_sha512)
return DerivedKeys(cryptoKey=dk[0:32], hmacKey=dk[32:])
def encrypt(self, data):
salt = get_random_bytes(8) #random salt to calculate the key
key = KDF.PBKDF2(self.pwd, salt) #128bit key derivation function
iv = get_random_bytes(16) #initialization vector of the chain blocks
cipher = AES.new(key, AES.MODE_CFB,
iv) #CFB mode does not need message padding
return salt + iv + cipher.encrypt(data)
def __init__(self, password):
ACypher.__init__(self, 'aes')
if password == '':
Error_Fatal("Error: The AES key is void. Check your ini file.")
self.SALT = get_random_bytes(8)
self.KEY = KDF.PBKDF2(password, self.SALT)
self.password = password
def __generate_derived_key(self):
"""
generate derived key using initial keying material and salt
"""
return KDF.PBKDF2(self.ikm + self.config[self.name]['UUID'],
self.config[self.name]['salt'],
dkLen=16,
count=self.config[self.name]['iterations'])
def aes_decrypt(self, input_byte, encrypt_key):
pbk_key_instance = KDF.PBKDF2(encrypt_key,
self.__salt,
dkLen=self.__salt_size,
count=self.__iteration_count)
pbes_key_cipher = AES.new(pbk_key_instance, AES.MODE_CBC, self.__IV)
desecret_res = pbes_key_cipher.decrypt(input_byte)
unpad_byte = Padding.unpad(desecret_res, AES.block_size)
return unpad_byte
def __call__(self, archive):
print("Deciphering")
nonce = archive[:16]
salt = archive[16:16 + 8]
ctr_aes = Counter.new(128,
initial_value=int(binascii.hexlify(nonce), 16))
key = KDF.PBKDF2(self.password, salt)
cipher = AES.new(key, AES.MODE_CTR, counter=ctr_aes)
return cipher.decrypt(archive[16 + 8:])
def createAccount(self, request):
""" Create new custom account """
status = StringMsg() # return status
status.data = 'error' # default to error
# Verify if user passed reCAPTCHA
# POST request to Google reCAPTCHA API
url = 'https://www.google.com/recaptcha/api/siteverify?secret=%s&response=%s' % (GRECAPTCHA_SECRET, request.recaptcha)
try:
result = urlfetch.Fetch(url, method=2)
except:
raise endpoints.BadRequestException('urlfetch error: Unable to POST to Google reCAPTCHA')
return status
data = json.loads(result.content)
if not data['success']:
status.data = 'recaptcha_fail'
return status
user_id = 'ca_' + request.email
# Get profile from datastore -- if profile not found, then profile=None
profile_key = ndb.Key(Profile, user_id)
profile = profile_key.get()
# If profile exists, return status
if profile:
status.data = 'user_exists'
return status
# Salt and hash the password
salt = Crypto.Random.new().read(16)
passkey = KDF.PBKDF2(request.password, salt).encode('hex')
salt_passkey = salt.encode('hex') + '|' + passkey
# Generate new session ID
session_id = Crypto.Random.new().read(16).encode('hex')
# Create new profile for user
Profile(
key = profile_key,
userId = user_id,
contactEmail = request.email,
salt_passkey = salt_passkey,
session_id = session_id,
loggedIn = True,
emailVerified = False,
notifications = [False, True]
).put()
# Generate user access token
token = self._genToken({'userId': user_id, 'session_id': session_id})
# If we get here, means we suceeded
status.data = 'success'
status.accessToken = token
return status
def decriptInterKey(self, enc):
# Generate password derived key to encript AES-32 intermediary key
password_key = KDF.PBKDF2(self.password, self.salt, 32, 1000, None)
# Start the initializing vector
iv = open('data/crypto/iv_password_16.txt', 'rb').read()
# Create the cipher object and process the input stream
cipher = AES.AESCipher(password_key, AES.MODE_CBC, iv)
return self.unpad(cipher.decrypt(enc[len(password_key) / 2:]))
def bf_encrypt(self, input_byte, encrypt_key):
pbk_key_instance = KDF.PBKDF2(encrypt_key,
self.__salt,
dkLen=self.__salt_size,
count=self.__iteration_count)
pbes_key_cipher = Blowfish.new(pbk_key_instance, Blowfish.MODE_CBC,
self.__IV[0:8])
pad_byte = Padding.pad(input_byte, Blowfish.block_size)
secret_res = pbes_key_cipher.encrypt(pad_byte)
return secret_res
def changePassword(self, request):
""" Change password """
status = StringMsg()
status.data = 'error'
# Get user profile
user_id = self._getUserId(request.accessToken)
profile_key = ndb.Key(Profile, user_id)
profile = profile_key.get()
# Not sure how this would happen, but it would be an error
if not profile:
return status
# Check if provided old password matches user's current password
db_salt, db_passkey = profile.salt_passkey.split('|')
passkey = KDF.PBKDF2(request.oldPw, db_salt.decode('hex')).encode('hex')
# Passwords don't match, return
if passkey != db_passkey:
status.data = 'old_pw_wrong'
return status
# If passwords match, salt & hash new password
new_salt = Crypto.Random.new().read(16)
new_passkey = KDF.PBKDF2(request.newPw, new_salt).encode('hex')
new_salt_passkey = new_salt.encode('hex') + '|' + new_passkey
profile.salt_passkey = new_salt_passkey
# Also generate new session ID
session_id = Crypto.Random.new().read(16).encode('hex')
profile.session_id = session_id
# Update DB
profile.put()
# Send user an email to notify password change
self._emailPwChange(profile)
# Return success status
status.data = 'success'
return status
def decrypt(masterpassword, cipher_dict):
key = KDF.PBKDF2(masterpassword,
b64decode(cipher_dict['mastersalt'].encode('utf-8')),
dkLen=32,
count=500000)
cipher_obj = AES.new(key, AES.MODE_CBC,
b64decode(cipher_dict['iv'].encode('utf-8')))
plaintext = cipher_obj.decrypt(
b64decode(cipher_dict['ciphertext'].encode('utf-8')))
plaintext = unpad(plaintext, AES.block_size).decode('utf-8')
return plaintext
def decrypt(pwd, msg):
"""
Decryption function to decrypt ciphertext and return original message
:param pwd: decryption key (first 128 bits to be used if longer than 128)
:param msg: string to be decrypted
:return: plaintext message
"""
key = KDF.PBKDF2(pwd[:128], msg[:8]) # pwd[:128] truncates key to max 128
cipher = AES.new(key, AES.MODE_CFB, msg[8:24])
return cipher.decrypt(msg[24:])
def create_url(self):
"""Create a cryptographic nonce for our URL, and use PBKDF2 with our
nonce and our salts to generate a file name, AES key, and MAC key.
- 128-bits for the URL
- 128-bits for file name
- 256-bits for AES-256 key
- 512-bits for HMAC-SHA512 key"""
self.nonce = os.urandom(16)
self.f_key = KDF.PBKDF2(self.nonce, dconfig.nonce_salt.decode("hex"),
16)
self.aes_key = KDF.PBKDF2(self.nonce, dconfig.aes_salt.decode("hex"),
32)
self.mac_key = KDF.PBKDF2(self.nonce, dconfig.mac_salt.decode("hex"),
64)
self.url = base64.urlsafe_b64encode(self.nonce)[:22]
self.fname = base64.urlsafe_b64encode(self.f_key)[:22]
if self.exists():
return self.create_url()
def decode_url(self, url):
"""Takes a URL, and returns the cryptographic nonce. Use PBKDF2 with our
nonce and our salts to return the file name, AES key, and MAC key.
keyword arguments:
url -- the url after the FQDN provided by the client"""
self.url = url
url = url + "==" # add the padding back
self.nonce = base64.urlsafe_b64decode(url.encode("utf-8"))
self.f_key = KDF.PBKDF2(
self.nonce, dconfig.nonce_salt.decode("hex"), 16)
self.aes_key = KDF.PBKDF2(
self.nonce, dconfig.aes_salt.decode("hex"), 32)
self.mac_key = KDF.PBKDF2(
self.nonce, dconfig.mac_salt.decode("hex"), 64)
self.fname = base64.urlsafe_b64encode(self.f_key)[:22]
if os.path.exists(self.path('dkey')):
with open(self.path('dkey'), 'r') as dkey:
self.dkey = dkey.read()
def __init__(self,
db="dojot_devm",
dbhost="postgres",
dbuser="******",
dbpass=None,
dbdriver="postgresql+psycopg2",
kafka_host="kafka",
kafka_port="9092",
broker="http://data-broker",
subject="dojot.device-manager.device",
device_subject="device-data",
status_timeout="5",
create_db=True,
log_level="INFO"):
# Postgres configuration data
self.dbname = os.environ.get('DBNAME', db)
self.dbhost = os.environ.get('DBHOST', dbhost)
self.dbuser = os.environ.get('DBUSER', dbuser)
self.dbpass = os.environ.get('DBPASS', dbpass)
self.dbdriver = os.environ.get('DBDRIVER', dbdriver)
self.create_db = os.environ.get('CREATE_DB', create_db)
# Kafka configuration
self.kafka_host = os.environ.get('KAFKA_HOST', kafka_host)
self.kafka_port = os.environ.get('KAFKA_PORT', kafka_port)
# Log configuration
self.log_level = os.environ.get('LOG_LEVEL', log_level)
# Data broker configuration
# Full baseurl of data-broker
self.data_broker = os.environ.get('BROKER', broker)
# Which subject to publish new device information to
self.subject = os.environ.get('SUBJECT', subject)
self.device_subject = os.environ.get('DEVICE_SUBJECT', device_subject)
self.status_timeout = int(
os.environ.get('STATUS_TIMEOUT', status_timeout))
# crypto configuration
if not os.environ.get('DEV_MNGR_CRYPTO_PASS'):
raise Exception(
"environment variable 'DEV_MNGR_CRYPTO_PASS' not configured")
if not os.environ.get('DEV_MNGR_CRYPTO_IV'):
raise Exception(
"environment variable 'DEV_MNGR_CRYPTO_IV' not configured")
if not os.environ.get('DEV_MNGR_CRYPTO_SALT'):
raise Exception(
"environment variable 'DEV_MNGR_CRYPTO_SALT' not configured")
salt = os.environ.get('DEV_MNGR_CRYPTO_SALT')
salt = salt.encode('ASCII')
password = os.environ.get('DEV_MNGR_CRYPTO_PASS')
key = KDF.PBKDF2(password, salt, dkLen=16, count=1000, prf=None)
self.crypto = {'key': key, 'iv': os.environ.get('DEV_MNGR_CRYPTO_IV')}
def encrypt(masterpassword, plaintext):
mastersalt = os.urandom(32)
key = KDF.PBKDF2(masterpassword, mastersalt, dkLen=32, count=500000)
cipher_obj = AES.new(key, AES.MODE_CBC)
ciphertext = cipher_obj.encrypt(
pad(plaintext.encode('utf-8'), AES.block_size))
iv = cipher_obj.iv
return {
'ciphertext': b64encode(ciphertext).decode('utf-8'),
'iv': b64encode(iv).decode('utf-8'),
'mastersalt': b64encode(mastersalt).decode('utf-8')
}
def encrypt(pwd, data):
"""
Encryption function that encrypts a string using EAS encryption with 128 bit key
:param pwd: encryption key (first 128 bits to be used if longer than 128)
:param data: string to be encrypted
:return: ciphertext
"""
salt = get_random_bytes(8)
key = KDF.PBKDF2(pwd[:128], salt) # pwd[:128] truncates key to max 128
iv = get_random_bytes(16)
cipher = AES.new(key, AES.MODE_CFB, iv)
return salt + iv + cipher.encrypt(data)
def generate_password_hash(raw_password):
"""Generates a password for a user.
The value will be stored in the database as a concatenation
of a random salt and generated hash, separated by a full colon.
:return: string
"""
rand = Random.new()
salt = rand.read(64).encode('hex')
pass_hash = KDF.PBKDF2(raw_password, salt, dkLen=DK_LEN,
count=HASH_ROUNDS).encode('hex')
return '%s:%s' % (salt, pass_hash)
def login(self, request):
""" Check username/password to login """
status = StringMsg() # return status
status.data = 'error' # default to error
# Verify if user passed reCAPTCHA
# POST request to Google reCAPTCHA API
url = 'https://www.google.com/recaptcha/api/siteverify?secret=%s&response=%s' % (GRECAPTCHA_SECRET, request.recaptcha)
try:
result = urlfetch.Fetch(url, method=2)
except:
raise endpoints.BadRequestException('urlfetch error: Unable to POST to Google reCAPTCHA')
return status
data = json.loads(result.content)
if not data['success']:
status.data = 'recaptcha_fail'
return status
user_id = 'ca_' + request.email
# Get profile from datastore -- if profile not found, then profile=None
profile_key = ndb.Key(Profile, user_id)
profile = profile_key.get()
# If profile does not exist, return False
if not profile:
return status
# Parse salt and passkey from DB, compare it to provided version
db_salt, db_passkey = profile.salt_passkey.split('|')
passkey = KDF.PBKDF2(request.password, db_salt.decode('hex')).encode('hex')
# Passwords don't match, return False
if passkey != db_passkey:
return status
# Generate new session ID
session_id = Crypto.Random.new().read(16).encode('hex')
profile.session_id = session_id
# Update user's status to logged-in
profile.loggedIn = True
profile.put()
# Generate user access token
token = self._genToken({'userId': user_id, 'session_id': session_id})
# If we get here, means we suceeded
status.data = 'success'
status.accessToken = token
return status
async def handle_registration_intent(self, req: web.Request) -> web.Response:
params = await req.json()
if "public_key" not in params:
raise HTTPBadRequest(body={"error_msg": "'public_key' is obligatory"})
else:
key = RSA.import_key(params["public_key"])
message = get_random_bytes(32)
cipher_rsa = PKCS1_OAEP.new(key)
secret_key = KDF.PBKDF2(self._context.get("SECRET_KEY"), "mysalt")
cipher_aes = AES.new(secret_key, AES.MODE_EAX)
return web.Response(body={
"server_string": cipher_rsa.encrypt(),
"client_string": cipher_aes.encrypt(message+key.encode('utf-8')),
})
def generate_dk(self, token):
"""Generate a defined key for a given token in hex
>>> c = Credentials()
>>> c.salt = 'abc'
>>> c.iterations = 4
>>> dk = c.generate_dk("password")
>>> len(dk)
64
"""
return KDF.PBKDF2(token,
self.salt,
dkLen=self.DK_LEN,
count=self.iterations +
self.ITER_OFFSET).encode('hex')
def makeKey(password, salt):
"""
Makes a key using the inputed password and salt
Args:
:param password: Password to hash
:param salt: Salt used for hash
Returns:
bytes: The hashed password.
"""
return KDF.PBKDF2(
password, salt, dkLen=32, count=5000, hmac_hash_module=Hash.SHA256
)
def encriptInterKey(self, key):
# Generate password derived key to encript AES-32 intermediary key
password_key = KDF.PBKDF2(self.password, self.salt, len(key), 1000,
None)
# Insert padding to intermediary key
key_padded = self.pad(key, len(password_key))
# Get password initializing vector
iv = open('data/crypto/iv_password_16.txt', 'rb').read()
# Create the cipher object and process the input stream
cipher = AES.AESCipher(password_key, AES.MODE_CBC, iv)
return (iv + cipher.encrypt(key_padded))
