def _createIV():
"""Create a 16-byte initialization vector.
@return: a C{str} initialization vector.
"""
try:
return randpool.RandomPool(512).get_bytes(16)
except AssertionError:
# An AssertionError can come from Crypto/Random/_UserFriendlyRNG.py,
# which produces an error "PID check failed. RNG must be re-initialized
# after fork(). Hint: Try Random.atfork()". This seems to only happen
# when running locally (in development mode).
atfork()
return randpool.RandomPool(512).get_bytes(16)
def createKey(keySize=32):
"""Create a random key.
@param keySize: a positive C{int} key length.
@return: a random string of length C{keySize}.
"""
try:
return randpool.RandomPool(512).get_bytes(keySize)
except AssertionError:
# An AssertionError can come from Crypto/Random/_UserFriendlyRNG.py,
# which produces an error "PID check failed. RNG must be re-initialized
# after fork(). Hint: Try Random.atfork()". This seems to only happen
# when running locally (in development mode).
atfork()
return randpool.RandomPool(512).get_bytes(keySize)
def mbi_crypt(self, nonce):
WINCRYPT_CRYPT_MODE_CBC = 1
WINCRYPT_CALC_3DES = 0x6603
WINCRYPT_CALC_SHA1 = 0x8004
# Read key and generate two derived keys
key1 = base64.b64decode(self.proof_token)
key2 = self._derive_key(key1, "WS-SecureConversationSESSION KEY HASH")
key3 = self._derive_key(key1,
"WS-SecureConversationSESSION KEY ENCRYPTION")
# Create a HMAC-SHA-1 hash of nonce using key2
hash = HMAC.new(key2, nonce, SHA).digest()
#
# Encrypt nonce with DES3 using key3
#
# IV (Initialization Vector): 8 bytes of random data
iv = randpool.RandomPool().get_bytes(8)
obj = DES3.new(key3, DES3.MODE_CBC, iv)
# XXX: win32's Crypt API seems to pad the input with 0x08 bytes
# to align on 72/36/18/9 boundary
ciph = obj.encrypt(nonce + "\x08\x08\x08\x08\x08\x08\x08\x08")
blob = struct.pack("<LLLLLLL", 28, WINCRYPT_CRYPT_MODE_CBC,
WINCRYPT_CALC_3DES, WINCRYPT_CALC_SHA1, len(iv),
len(hash), len(ciph))
blob += iv + hash + ciph
return base64.b64encode(blob)
def create_cryptoken(aes_key, data):
if len(aes_key) >= 32:
aes_key = aes_key[:32]
elif len(aes_key) >= 16:
aes_key = aes_key[:16]
elif len(aes_key) >= 8:
aes_key = aes_key[:8]
else:
raise AuthorizationFailure()
if crypto_version.startswith('2.0'):
prng = randpool.RandomPool()
iv = prng.get_bytes(256)
cipher = AES.new(aes_key, AES.MODE_CFB)
tmpbuf = cipher.encrypt(iv)
tmpbuf += cipher.encrypt(data)
return base64.b64encode(tmpbuf)
else:
prng = Random.new()
iv = prng.read(16)
cipher = AES.new(aes_key, AES.MODE_CFB, iv)
return base64.b64encode(iv + cipher.encrypt(data))
def sign_DSA(msg, key_tuple, k=None):
"""Create a DSA signature.
:Parameters:
- `msg`: string of data signature applies to
- `key_tuple`: tuple of DSA integers (y, g, p, q, x)
(see `DSA tuple`_)
- `k`: random integer 2 < k < q (automatically generated by
default)
:Returns: tuple (integer, integer) DSA signature values (r, s)
.. _DSA tuple:
DSA tuple:
- `y`: integer DSA public key
- `g`: integer DSA group
- `p`: integer DSA prime
- `q`: integer DSA order
- `x`: integer DSA secret value
"""
import Crypto.PublicKey.DSA as DSA
if k is None: # generate our own k value (2 < k < q)
import Crypto.Util.number as NUM
import Crypto.Util.randpool as RND
rnd = RND.RandomPool()
q = key_tuple[3]
while 1:
k = NUM.getRandomNumber(8*len(STN.int2str(q)), rnd.get_bytes)
if 2 < k < q:
break
dsa = DSA.construct(key_tuple) # note change in ordering
return dsa.sign(msg, k)
def makepuzzle(t): # Init PyCrypto RNG rnd = randpool.RandomPool() # Generate 512-bit primes p = number.getPrime(512, rnd.get_bytes) q = number.getPrime(512, rnd.get_bytes) n = p * q phi = (p - 1) * (q - 1) # AES key --- this is what we will encode into the puzzle solution key = number.getRandomNumber(128, rnd.get_bytes) # Need a random starting value for the puzzle, between 1 and n a = number.getRandomNumber(4096, rnd.get_bytes) a = a % n # *** puzzle shortcut *** # fast way to compute (a^2)^t (if you know phi) e = pow(2, t, phi) b = pow(a, e, n) # So b = (a^2)^t, and we encode the key into this solution ck = (key + b) % n return (key, (n, a, t, ck))
def make_uuid():
uuid_size = 32 + random.randint(1, 16)
uuid_bytes = randpool.RandomPool(512).get_bytes(uuid_size)
s = []
for x in uuid_bytes:
s.append(ord(x))
print "uuid " + str(s)
return base64.urlsafe_b64encode(str(uuid_bytes))
def generate_pwd():
if crypto_version.startswith('2.0'):
prng = randpool.RandomPool()
iv = prng.get_bytes(256)
else:
prng = Random.new()
iv = prng.read(16)
return base64.b64encode(iv)
def encrypt(plain_text,key_bytes):
assert len(key_bytes) == key_size
mode = AES.MODE_CBC
pad = block_size - len(plain_text) % block_size
data = plain_text + pad * chr(pad)
iv_bytes = randpool.RandomPool(512).get_bytes(block_size)
encrypted_bytes = iv_bytes + AES.new(key_bytes, mode, iv_bytes).encrypt(data)
return encrypted_bytes
def rand_rsa_key(key_lenght=CRYPTO.KEY_LENGHT.RSA):
"""
Return a random key with lenght received
:param key_lenght: Lenght of Key in bits (minimum: 1024)
"""
random_pool = randpool.RandomPool()
rsa_key = RSA.generate(key_lenght, random_pool.get_bytes)
return rsa_key.exportKey() # Return private key
def evaluateSubject(self, obj_py):
"""Generates an RSA keypair, and spews it out as plain text.
Has the limitation that it will *only* ever let you generate
one key pair (per iteration), in order to work around a bug."""
if self.do:
randfunc, self.do = randpool.RandomPool(int(obj_py)), 0
RSAKey = RSA.generate(int(obj_py), randfunc.get_bytes)
TextKey = keyToQuo(RSAKey)
if TextKey != 'N.': return TextKey
def encrypt(plaintext, password):
salt = crandom.RandomPool(SALT_SIZE)
salt = salt.get_bytes(SALT_SIZE)
key = generate_key(password, salt, NUMBER_OF_ITERATIONS)
cipher = AES.new(key, AES.MODE_ECB)
padded_plaintext = pad_text(plaintext, AES_MULTIPLE)
ciphertext = cipher.encrypt(padded_plaintext)
ciphertext_with_salt = salt + ciphertext
return ciphertext_with_salt
def enc_rsa(message):
# rsa_pub_key = rsa.publickey()
rsa = RSA.generate(1024, RANDOM.RandomPool().get_bytes)
rsa_pub_key = rsa.publickey()
rsa_pub_key.n = 145471325565137272885782581039688149428232444669081670130562887504720589945224856535922663715912109010927552603613192335809372301855527754295948685977606233230830293484559809494872642754838525110340427705495371805952848626596076943737994354649406602042592969617559716470638070888599314074058154791892769802391
rsa_pub_key.e = 65537
print('rsa_pub_key.n')
print(rsa_pub_key.n)
encrypto = rsa_pub_key.encrypt(message, "")
return encrypto
def generateRSAclefagent(self):
"""
Function generate clef RSA to file
"""
pool = randpool.RandomPool()
# In real life, you use a *much* longer key
self.allkey = RSA.generate(1024, pool.get_bytes)
self.publickey = self.allkey.publickey()
pickle.dump(self.allkey, open(self.fileallkey, 'w'))
pickle.dump(self.publickey, open(self.filekeypublic, 'w'))
return self.allkey
def _inventkey(self, key_size):
# TBD: Not a very secure algorithm. Eventually, I'd like to use JHy's
# kernelrand module
import time
from Crypto.Util import randpool
# TBD: key_size * 2 to work around possible bug in RandomPool?
pool = randpool.RandomPool(key_size * 2)
while key_size > pool.entropy:
pool.add_event()
# we now have enough entropy in the pool to get a key_size'd key
return pool.get_bytes(key_size)
def _randnum(self, size):
# TBD: Not a very secure algorithm.
# TBD: size * 2 to work around possible bug in RandomPool
from Crypto.Util import randpool
import time
pool = randpool.RandomPool(size * 2)
while size > pool.entropy:
pass
# we now have enough entropy in the pool to get size bytes of random
# data... well, probably
return pool.get_bytes(size)
def encrypt_string(plain_text, key_string): block_size = 16 mode = AES.MODE_CBC plain_data = base64.urlsafe_b64decode(plain_text) pad = block_size - len(plain_data) % block_size print "pad = " + str(pad) data = plain_data + (pad * chr(pad)) iv_bytes = randpool.RandomPool(512).get_bytes(block_size) key_bytes = base64.urlsafe_b64decode(key_string) encrypted_bytes = iv_bytes + AES.new(key_bytes, mode, iv_bytes).encrypt(data) encrypted_string = base64.urlsafe_b64encode(str(encrypted_bytes)) return encrypted_string
def dec_rsa(encrypto):
rsa = RSA.generate(1024, RANDOM.RandomPool().get_bytes )
rsa.n=145471325565137272885782581039688149428232444669081670130562887504720589945224856535922663715912109010927552603613192335809372301855527754295948685977606233230830293484559809494872642754838525110340427705495371805952848626596076943737994354649406602042592969617559716470638070888599314074058154791892769802391
rsa.e=65537
rsa.d=21517601202808195726914206335333276173112674040955150681991495360952765596975903066347777622748248848008479102482968193590430674186909471750994500234476930448082061706047301016136608755418669760263728418550774979347859116947293576480638933146421447506419194772797598857419375571888971551074154487277961921937
rsa.p=11444448290025606916724702822518266092555354869033384100260512949484030906682203805655960827455078445407498725745812188968143376548796960389934850463502557
rsa.q=12711082428667409467280738736266707221075884674685463640039196795888245510768877737928973598498601428894094815378094110994961553740257214655445784230120963
rsa.u=12213696054552591246008243178713852307335582484378605284341118185114591281487593461839382892684071842018263062496886067580686240642833174841748501441564395
rsa_private_key = RSA.construct((rsa.n, rsa.e, rsa.d))
decrypto = rsa_private_key.decrypt( encrypto )
# print('rsa.n')
# print(rsa.n)
return decrypto
def rsa(message):
message = message.encode('utf-8')
#鍵オブジェクト( 鍵を16ByteまでOKとする )
rsa = RSA.generate(1024, RANDOM.RandomPool().get_bytes)
#公開鍵
rsa_pub_key = rsa.publickey()
#秘密鍵
rsa_private_key = RSA.construct((rsa.n, rsa.e, rsa.d))
#messagez
#message = "This is enc Test".encode('utf-8')
#暗号化
encrypto = rsa_pub_key.encrypt(message, "")
return encrypto
def encrypt(self, data_json):
from Crypto.Util import randpool
# add expiration date in UTC timestamp from Epoch
if not 'expires' in data_json:
# add expires in 1 hour
data_json['expires'] = int(time.time()) + 3600
# dump JSON data to string add padding if needed
raw = self._pad(json.dumps(data_json))
# generate IV
iv = randpool.RandomPool(self.bs).get_bytes(self.bs)
# encrypt data and prepend IV
res = base64.b64encode(iv +
AES.new(self.key, self.mode, iv).encrypt(raw))
# quote data to use as an url parameter and return
return urllib.quote(res)
def gen_random(numbytes, poolsize=None):
"""Retrieve random bytes.
:Parameters:
- `numbytes`: integer number of random bytes to retrieve
- `poolsize`: integer size of random pool to choose bytes from
(default 256)
:Returns: string of random bytes
"""
import Crypto.Util.randpool as RND
if None == poolsize:
if numbytes > 256:
poolsize = numbytes
else:
poolsize = 256
rnd = RND.RandomPool(poolsize)
return rnd.get_bytes(numbytes)
def rsadecyptaes(hostt):
host = hostt
port = 50002
blah = randpool.RandomPool()
RSAKey = RSA.generate(1024, blah.get_bytes)
RSAPubKey = RSAKey.publickey()
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
s.bind((host, port))
s.listen(1)
clientsock, clientaddr = s.accept()
clientsock.send(pickle.dumps(RSAPubKey))
rcstring = ''
buf = clientsock.recv(1024)
rcstring += buf
clientsock.close()
encmessage = pickle.loads(rcstring)
key = RSAKey.decrypt(encmessage)
s.close()
return key
def encrypt_integrity(algorithm, key, msg):
"""Encrypt a message with integrity protection.
:Parameters:
- `msg`: string cleartext
- `algorithm`: integer cipher constant
- `key`: string encryption key
:Returns: `OpenPGP.packet.SymmetricallyEncryptedIntegrityProtectedData.SymmetricallyEncryptedIntegrityProtectedData` instance
:note: It is up to the caller to make sure that `msg` is a valid
message string (compressed properly, etc.).
:note: Integrity check via SHA-1 is hardcoded.
"""
import Crypto.Util.randpool as RND
from openpgp.sap.pkt.Packet import create_Packet
bs = _import_cipher(algorithm).block_size
rnd = RND.RandomPool(bs)
prefix = rnd.get_bytes(bs)
clearstream = StringIO()
cipherstream = StringIO()
clearstream.write(prefix)
clearstream.write(prefix[-2:])
clearstream.write(msg)
clearstream.write('\xd3\x14')
clearstream.write(sha.new(clearstream.getvalue()).digest()) # hash previous
clearstream.seek(0) # again, magic .read() should handle this in crypt_CFB()
cipherstream.write('\x01')
cipherstream.seek(0, 2)
clearstream.seek(0)
crypt_CFB(clearstream, cipherstream, algorithm, key, None, 'encrypt')
cipherstream.seek(0)
ciphertext = cipherstream.read()
return create_Packet(PKT_SYMENCINTDATA, ciphertext)
def make_root(cls, user: User, magicnumber: str = None) -> 'Block':
""" Make root block
The root block has no any messages and closed from the creating.
The first closer is the administrator of the chain.
>>> rootuser = User.generate()
>>> root = Block.make_root(rootuser)
>>> child = Block(root)
>>> root.is_closed()
True
>>> root.verify()
True
>>> child.is_closed()
False
>>> root.messages
[]
Index of the root block is 0.
>>> root.index
0
>>> child.index
1
"""
result = cls(None, magicnumber)
result.timestamp = int(time.time() * 1000)
result.key = randpool.RandomPool().get_bytes(32)
result.closer = user
result.signature = user.sign_raw(
result.timestamp.to_bytes(8, 'big') + result.key)
return result
def CreateKeyPair(size=1024):
return RSA.generate(size, randpool.RandomPool().get_bytes)
from __future__ import generators
from pprint import pprint
import struct
import operator
from binascii import hexlify
import types
import sha
import Queue
from Crypto.Util import randpool
from Crypto.Util.number import bytes_to_long, long_to_bytes
import IPAddress
RandomPool = randpool.RandomPool()
class Memoize:
"""Memoize(fn) - an instance which acts like fn but memoizes its arguments
Will only work on functions with non-mutable arguments
"""
def __init__(self, fn):
self.fn = fn
self.memo = {}
def __call__(self, *args):
if not self.memo.has_key(args):
self.memo[args] = self.fn(*args)
return self.memo[args]
##try:
def setup (self):
self.pool = randpool.RandomPool(160, hash=SHA)
def dec_rsa(rsa,encrypto):
rsa_private_key = RSA.construct((rsa.n, rsa.e, rsa.d))
decrypto = rsa_private_key.decrypt( encrypto )
return decrypto
print('Starting the server at', datetime.now())
print('Waiting for a client to call.')
server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
server.bind(address)
server.listen(5)
client, addr = server.accept()
rsa = RSA.generate(1024, RANDOM.RandomPool().get_bytes )
rsa_pub_key = rsa.publickey()
rsa_pub_key_send = rsa_pub_key.exportKey()
print('rsa_pub_key_send')
print(rsa_pub_key_send)
client.send(rsa_pub_key_send)
num = client.recv(max_size)
client.send(num)
allsize=unpack('H',num)
print(allsize)
#復号して書き込み
f=open('text1.jpg', 'ab') # 書き込みモードで開く
from Crypto.Util import number, randpool
from copy import deepcopy
from Crypto.Cipher import AES
import sys
import time
import socket
import numpy as np
rnd = randpool.RandomPool()
SECOND = 1
MINUTE = 60
HOUR = MINUTE * 60
DAY = HOUR * 24
MONTH = DAY * 31
YEAR = DAY * 365
MOD_BITS = 512 # 2048 # for time-lock puzzle N
AES_BITS = 24 # 192
FLD_BITS = 192 # for finite field p
def calibrate_speed():
p = number.getPrime(MOD_BITS, rnd.get_bytes)
q = number.getPrime(MOD_BITS, rnd.get_bytes)
N = p * q
bignum = number.getRandomNumber(MOD_BITS, rnd.get_bytes) #big number
start = time.time()
trials = 1000
for i in range(0, trials):
bignum = pow(bignum, 2, N)
def sign_ElGamal(msg, key_tuple, k=None):
"""Create an ElGamal signature.
:Parameters:
- `msg`: string of data signature applies to
- `key_tuple`: tuple ElGamal key integers (p, g, x)
(see `ElGamal key tuple`_)
- `k`: integer (must be relatively prime to p-1)
:Returns: tuple (integer, integer) ElGamal signature values (a, b)
.. _ElGamal key tuple:
ElGamal key tuple:
- `p`: integer ElGamal prime
- `g`: integer ElGamal random "g" value
- `x`: integer ElGamal private key
"""
import Crypto.PublicKey.ElGamal as ELG
if k is None: # generate our own prime k value (k relatively prime to p-1)
import Crypto.Util.number as NUM
import Crypto.Util.randpool as RND
rnd = RND.RandomPool()
q = key_tuple[0] # no restrictions on bit length for k, good enough?
k = NUM.getPrime(8*len(STN.int2str(q)), rnd.get_bytes)
elg = ELG.construct((key_tuple[0], key_tuple[1], 0, key_tuple[2]))
return elg.sign(msg, k)
