def test_ssh_key_bits_and_fingerprint(self):
with self.assertRaises(sshpubkeys.InvalidKeyException):
sshpubkeys.SSHKey('an invalid key string')
valid_ssh_key = 'ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQC3uta/x/kAwbs2G7AOUQtRG7l1hjEws4mrvnTZmwICoGNi+TUwxerZgMbBBID7Kpza/ZSUqXpKX5gppRW9zECBsbJ+2D0ch/oVSZ408aUE6ePNzJilLA/2wtRct/bkHDZOVI+iwEEr1IunjceF+ZQxnylUv44C6SgZvrDj+38hz8z1Vf4BtW5jGOhHkddTadU7Nn4jQR3aFXMoheuu/vHYD2OyDJj/r6vh9x5ey8zFmwsGDtFCCzzLgcfPYfOdDxFIWhsopebnH3QHVcs/E0KqhocsEdFDRvcFgsDCKwmtHyZVAOKym2Pz9TfnEdGeb+eKrleZVsApFrGtSIfcf4pH user@host'
ssh_key = sshpubkeys.SSHKey(valid_ssh_key)
self.assertEqual(ssh_key.bits, 2048)
self.assertEqual(ssh_key.hash(),
'73:e7:0c:60:7b:d2:7b:df:81:2e:c2:57:54:53:81:91')
def test_stress_post_token_and_host(client):
my_auth_id = random_uuid()
test_post_authority(client, my_auth_id)
# Generate a single RSA key pair and reuse it - it takes a few seconds.
key = RSA.generate(2048)
pub_key = key.publickey().exportKey('OpenSSH')
fingerprint = sshpubkeys.SSHKey(pub_key).hash_md5()
# Should do about 15 iterations/second, so only do 4 seconds worth.
start = time.time()
for i in range(60):
hid = random_uuid()
token = token_request(auth=my_auth_id, host=hid)
response = client.simulate_post('/hosttokens', body=json.dumps(token))
assert response.status == falcon.HTTP_CREATED
assert 'location' in response.headers
location_path = response.headers['location'].split('/')
assert location_path[1] == 'hosttokens'
token_id = location_path[-1]
# Verify that it's a valid UUID
uuid.UUID(token_id, version=4)
host = host_request(token_id, host=hid, pub_key=pub_key)
response = client.simulate_post('/hostcerts', body=json.dumps(host))
assert response.status == falcon.HTTP_CREATED
assert 'location' in response.headers
location = response.headers['location'].split('/')
assert location[1] == 'hostcerts'
assert location[2] == hid
assert location[3] == fingerprint
assert time.time() - start < 5
def add_public_key(session, user, public_key_str):
"""Add a public key for a particular user.
Args:
session: db session
user: User model of user in question
public_key_str: public key to add
Return created PublicKey model or raises DuplicateKey if key is already in use.
"""
pubkey = sshpubkeys.SSHKey(public_key_str, strict=True)
pubkey.parse()
db_pubkey = PublicKey(
user=user,
public_key=pubkey.keydata.strip(),
fingerprint=pubkey.hash_md5().replace(b"MD5:", b""),
key_size=pubkey.bits,
key_type=pubkey.key_type,
)
try:
db_pubkey.add(session)
Counter.incr(session, "updates")
except IntegrityError:
session.rollback()
raise DuplicateKey()
session.commit()
return db_pubkey
def save(self, *args, **kwargs):
self.key = self.key.strip() if self.key else self.key
k = sshpubkeys.SSHKey(self.key)
self.bits = k.bits
self.fingerprint = k.hash()
self.full_clean()
super(SSHKey, self).save(*args, **kwargs)
def min_bits(self):
"""
The minimum number of bits considered secure for the type of this key.
"""
k = sshpubkeys.SSHKey(self.key)
return settings.SSH_KEY_MIN_BITS_FOR_TYPE.get(
k.key_type, settings.SSH_KEY_MIN_BITS_DEFAULT)
def get_bitbucket_users(self):
uname = self.conf['username']
appwd = self.conf['password']
email = self.conf['email']
auth = BasicAuthenticator(uname, appwd, email)
bitbucket = Client(auth)
teams = Team.find_teams_for_role(role="admin", client=bitbucket)
for t in teams:
for m in t.members():
pprint(m)
login = m['nickname']
name = m['display_name']
email = ''
self.init_user(login, name, email)
r = requests.get("{}/users/{}/ssh-keys".format(
BitbucketConn.v1url, login),
auth=(uname, appwd))
if r.status_code == 200:
key_response = r.json()
for keyvalue in key_response['values']:
key = sshpubkeys.SSHKey(keyvalue['key'])
fingerprint = key.hash_md5()
self.user_list[login][PUBKEYS][fingerprint] = keyvalue[
'key']
else:
print(r.status_code)
def is_ok(self, key: str):
"""
Args:
key (str): the ssh key to check.
Returns:
bool: is the key ok or not.
"""
if key == '':
return False
ssh_key = sshpubkeys.SSHKey(key)
try:
ssh_key.parse()
except sshpubkeys.InvalidKeyError as err:
logging.error("Invalid key: {}".format(err))
return False
except NotImplementedError as err:
logging.error("Invalid key type: {}".format(err))
return False
if ssh_key.key_type == b'ssh-rsa' and ssh_key.bits < self.rsa_key_size:
logging.error(
"Invalid key: minimum key size for RSA is {} bits".format(
self.rsa_key_size))
return False
elif ssh_key.key_type in (b'ssh-ed25519', b'ssh-rsa'):
return True
else:
logging.error("Skipping unsupported key type {}".format(
ssh_key.key_type))
return False
def public_key_obj(self):
if self.public_key:
try:
return sshpubkeys.SSHKey(self.public_key)
except TabError:
pass
return None
def ssh_keys_POST():
user = User.query.get(current_user.id)
valid = Validation(request)
ssh_key = valid.require("ssh-key")
if valid.ok:
try:
parsed_key = ssh.SSHKey(ssh_key)
valid.expect(parsed_key.bits, "This is not a valid SSH key",
"ssh-key")
except:
valid.error("This is not a valid SSH key", "ssh-key")
if valid.ok:
fingerprint = parsed_key.hash_md5()[4:]
valid.expect(SSHKey.query\
.filter(SSHKey.fingerprint == fingerprint) \
.count() == 0, "We already have this SSH key on file.", "ssh-key")
if not valid.ok:
return render_template("keys.html",
current_user=user,
ssh_key=ssh_key,
valid=valid)
key = SSHKey(user, ssh_key, fingerprint, parsed_key.comment)
db.session.add(key)
audit_log("ssh key added", 'Added SSH key {}'.format(fingerprint))
db.session.commit()
return redirect("/keys")
def get_github_users(self):
username = self.conf['username']
password = self.conf['password']
g = Github(username, password)
for member in g.get_organization(self.organization).get_members():
login = member.login.lower()
name = member.name
email = member.email
self.init_user(login, name, email)
if member.get_keys().totalCount < 1:
print(
"Skipping {}. User doesn't have an SSH key associated with his github account.. "
.format(login))
continue
if not self.valid_login(login):
print("Skipping {}, GitHub account is considered invalid.".
format(login))
continue
for userkey in member.get_keys():
key = sshpubkeys.SSHKey(userkey.key)
fingerprint = key.hash_md5()
self.user_list[login][PUBKEYS][fingerprint] = userkey.key
def post(self, request, **kwargs): #pylint:disable=all
if hasattr(request.data, '_mutable'):
request.data._mutable = True #pylint:disable=protected-access
#1. Create the account
serializer = self.serializer_class(data=request.data)
serializer.is_valid(raise_exception=True)
serializer.save()
#2. Create it's SSH key
account = Account.objects.get(username=serializer.data['username'],
email=serializer.data['email'])
key = RSA.generate(4096)
model = SSHKey(name='default',
owner=account.username,
public=key.exportKey('OpenSSH'),
fingerprint=sshpubkeys.SSHKey(
key.exportKey('OpenSSH')).hash_md5())
model.user_creation = True
model.organization_creation = True
model.save()
key = {
'name': model.name,
'private': key.exportKey('PEM'),
'public': model.public,
'fingerprint': model.fingerprint
}
return Response({
'account': serializer.data,
'key': key
},
status=status.HTTP_201_CREATED)
def createUserCert(session, user_id, user_name, auth_id, pub):
# Retrieve the authority's private key and generate the certificate
auth = getAuthority(session, auth_id)
if auth is None:
raise falcon.HTTPNotFound(
description='No Authority found with that ID')
fingerprint = sshpubkeys.SSHKey(pub).hash_md5()
certRecord = getUserCert(session, user_id, fingerprint)
if certRecord is not None:
return certRecord
principals = getProjectRoleNamesForUser(auth_id, user_id)
user = UserCert(
user_id=user_id,
user_name=user_name,
principals=','.join(principals),
fingerprint=fingerprint,
auth_id=auth_id,
)
session.add(user)
session.flush()
user.cert = generateCert(get_secret(auth.user_key),
pub,
user=True,
principal_list=principals,
serial=user.serial,
days_valid=365,
identity=user_name)
if user.cert is None:
raise falcon.HTTPInternalServerError(
"Failed to generate the certificate")
session.commit()
return user
def validate_ssh_public_key(text):
ssh = sshpubkeys.SSHKey(text)
try:
ssh.parse()
except (sshpubkeys.InvalidKeyException, UnicodeDecodeError):
return False
except NotImplementedError as e:
return False
return True
def test_post_user(client):
body = user_request()
response = client.simulate_post('/usercerts', body=json.dumps(body))
assert response.status == falcon.HTTP_CREATED
assert 'location' in response.headers
location = response.headers['location'].split('/')
assert location[1] == 'usercerts'
assert location[2] == body['user_id']
assert location[3] == sshpubkeys.SSHKey(body['pub_key']).hash_md5()
def ssh_public_key_validator(public_key):
'''
validate public key string
'''
try:
key = sshpubkeys.SSHKey(public_key)
key.parse()
except (sshpubkeys.InvalidKeyError, sshpubkeys.exceptions.MalformedDataError, UnicodeEncodeError) as exc:
LOGGER.exception(exc)
raise ValidationError('Malformed SSH Public Key')
def test_post_second_cert_same_user(client):
key = RSA.generate(2048)
pub_key = key.publickey().exportKey('OpenSSH')
body = user_request(pub_key=pub_key)
response = client.simulate_post('/usercerts', body=json.dumps(body))
assert response.status == falcon.HTTP_CREATED
assert 'location' in response.headers
location = response.headers['location'].split('/')
assert location[1] == 'usercerts'
assert location[2] == user_id
assert location[3] == sshpubkeys.SSHKey(pub_key).hash_md5()
def public_key_obj(self):
class PubKey(object):
def __getattr__(self, item):
return ''
if self.public_key:
import sshpubkeys
try:
return sshpubkeys.SSHKey(self.public_key)
except (TabError, TypeError):
pass
return PubKey()
def validate_pubkey(pubkey):
# TODO see if I can get the type out
key = ssh.SSHKey(pubkey, strict_mode=False, skip_option_parsing=True)
try:
key.parse()
except ssh.InvalidKeyException as e:
raise ValidationError('Could not validate key: {}'.format(e))
except NotImplementedError as e:
raise ValidationError('Invalid key type')
except Exception as e:
raise ValidationError('unknown error: {}'.format(e))
def check_ssh_key(key_path: str) -> bool:
if key_path and os.path.exists(key_path):
with open(key_path) as key:
contents = key.read()
key = sshpubkeys.SSHKey(contents)
try:
key.parse()
except (sshpubkeys.InvalidKeyError, NotImplementedError) as e:
return False
return True
return False
def ssh_key_fingerprint(self):
if self.public_key:
public_key = self.public_key
elif self.private_key:
public_key = ssh_pubkey_gen(self.private_key, self.password)
else:
return ''
public_key_obj = sshpubkeys.SSHKey(public_key)
fingerprint = public_key_obj.hash_md5()
return fingerprint
def _parse_public_key(self):
"""parse publickey and update fiels"""
key = sshpubkeys.SSHKey(self.public_key)
key.parse()
self.type = key.key_type.decode('utf-8').replace('ssh-', '')
self.bits = key.bits
self.fingerprint = key.hash_sha256()
self.comment = key.comment
LOGGER.debug(self.__dict__)
def createHostCert(session, token_id, host_id, pub):
token = session.query(Token).get(token_id)
if token is None:
raise falcon.HTTPNotFound(description='No Token found with that ID')
if token.host_id != host_id:
raise falcon.HTTPConflict(
description='The token is not valid for this instance ID')
fingerprint = sshpubkeys.SSHKey(pub).hash_md5()
if token.used:
if token.fingerprint_used != fingerprint:
raise falcon.HTTPConflict(
description='Token already signed a different public key')
# The token was already used for same host and pub key. Return record.
host = session.query(HostCert).get([host_id, fingerprint])
if host is None:
raise falcon.HTTPInternalServerError(
description='Token already used, but Host record not found.')
if host.token_id == token_id:
return host
raise falcon.HTTPConflict(
description='The presented token was previously used')
auth = getAuthority(session, token.auth_id)
if auth is None:
raise falcon.HTTPNotFound(
description='No Authority found with that ID')
certRecord = session.query(HostCert).get([host_id, fingerprint])
if certRecord is not None:
raise falcon.HTTPConflict('This public key is already signed.')
cert = generateCert(get_secret(auth.host_key),
pub,
user=False,
days_valid=365,
identity=token.hostname)
if cert == '':
raise falcon.HTTPInternalServerError(
"Failed to generate the certificate")
host = HostCert(host_id=host_id,
fingerprint=fingerprint,
auth_id=token.auth_id,
token_id=token_id,
pubkey=pub,
cert=cert,
hostname=token.hostname)
session.add(host)
# Update the token
token.used = True
token.date_used = datetime.utcnow()
token.fingerprint_used = host.fingerprint
session.add(token)
session.commit()
return host
def add_user_ssh_key(username, key):
username = pipes.quote(username)
k = sshpubkeys.SSHKey(key)
try:
k.parse()
run("mkdir -p /home/" + username + "/.ssh")
run("echo '" + key + "' >> /home/" + username +
"/.ssh/authorized_keys")
except:
return False
return True
def get_user_ssh_keys(username):
username = pipes.quote(username)
keyFile = open("/home/" + username + "/.ssh/authorized_keys", "r")
keys = []
for line in keyFile.read().split("\n"):
if line:
k = sshpubkeys.SSHKey(line)
keys.append(SSHKey(k.comment, k.hash_md5()))
keyFile.close()
return keys
def ssh_key_fingerprint(self):
if self.public_key:
public_key = self.public_key
elif self.private_key:
try:
public_key = ssh_pubkey_gen(private_key=self.private_key, password=self.password)
except IOError as e:
return str(e)
else:
return ''
public_key_obj = sshpubkeys.SSHKey(public_key)
fingerprint = public_key_obj.hash_md5()
return fingerprint
def add_public_key(session, user, public_key_str):
"""Add a public key for a particular user.
Args:
session: db session
user: User model of user in question
public_key_str: public key to add
Throws:
DuplicateKey if key is already in use
PublicKeyParseError if key can't be parsed
BadPublicKey if a plugin rejects the key
Returns:
PublicKey model object representing the key
"""
pubkey = sshpubkeys.SSHKey(public_key_str, strict=True)
try:
pubkey.parse()
except sshpubkeys.InvalidKeyException as e:
raise PublicKeyParseError(e.message)
try:
get_plugin_proxy().will_add_public_key(pubkey)
except PluginRejectedPublicKey as e:
raise BadPublicKey(e.message)
db_pubkey = PublicKey(
user=user,
public_key=pubkey.keydata.strip(),
fingerprint=pubkey.hash_md5().replace(b"MD5:", b""),
fingerprint_sha256=pubkey.hash_sha256().replace(b"SHA256:", b""),
key_size=pubkey.bits,
key_type=pubkey.key_type,
comment=pubkey.comment,
)
try:
db_pubkey.add(session)
Counter.incr(session, "updates")
except IntegrityError:
session.rollback()
raise DuplicateKey()
session.commit()
return db_pubkey
def run(self, session, dry_run=True):
for key in session.query(PublicKey):
pubkey = sshpubkeys.SSHKey(key.public_key, strict=True)
logging.info("Processing Key (id={})".format(key.id))
try:
pubkey.parse()
except sshpubkeys.InvalidKeyException as e:
logging.error("Invalid Key (id={}): {}".format(key.id, e.message))
continue
try:
get_plugin_proxy().will_add_public_key(pubkey)
except PluginRejectedPublicKey as e:
logging.error("Bad Key (id={}): {}".format(key.id, e.message))
continue
def get_ssh_host_key_infos():
'''
get fingerprints of ssh host keys
'''
KEY_TYPES = ['rsa', 'ecdsa', 'ed25519']
data = {}
for key_type in KEY_TYPES:
file = os.path.join(settings.BORGHIVE['CONFIG_PATH'],
'ssh_host_{}_key.pub'.format(key_type))
if os.path.isfile(file):
LOGGER.debug('found %s', file)
with open(file) as f:
key = sshpubkeys.SSHKey(f.read())
key.parse()
data[key_type] = key.hash_sha256()
LOGGER.debug(data)
return data
def validate_key(line):
if not line:
return None
key = sshpubkeys.SSHKey(line, skip_option_parsing=True)
try:
key.parse()
# rebuild the key to make sure it's safe
raw_key = base64.b64encode(key._decoded_key).decode('UTF-8')
return "{type:s} {key:s} {bits:d} {comment:s}".format(
type=key.key_type.decode('UTF-8'),
key=raw_key,
bits=key.bits,
comment=key.comment)
except sshpubkeys.InvalidKeyError as err:
LOG.warning("Skipping invalid key %s: %s", line, str(err))
except NotImplementedError as err:
LOG.warning("Skipping unknown key type: %s", str(err))
return None
def validate_public(self, data):
"""
Validate the public key,
and generate the fingerprint.
:param data: The public key to validate.
:type data: str
:returns: The validated public key
:rtype: str
:raises serializers.ValidationError: If the public key is invalid.
"""
try:
ssh = sshpubkeys.SSHKey(data)
ssh.parse()
except (sshpubkeys.InvalidKeyException, NotImplementedError):
self.initial_data['fingerprint'] = 'invalid'
raise serializers.ValidationError("Invalid key")
fingerprint = ssh.hash_md5()
self.initial_data['fingerprint'] = fingerprint
return data