def DecryptECIES(curve_name, R, enc, t, pwd):
'''Performs ECIES decryption.'''
# Setup for Decryption
E = PredefinedCurves(curve_name)
# Get secret key s
hashpwd = SHA512.new(pwd).hexdigest() + RIPEMD.new(pwd).hexdigest()
s = int(str(int(hashpwd,16))[0: len(str(E.N))]) % E.N
if s < 2:
s = E.N/2
# Begin Decryption
Z = E.multPoint(s,R)
RZ = str(R)+str(Z)
H1 = SHA512.new(RZ).hexdigest()
k1 = H1[0:32]
k2 = H1[32:128]
H2 = RIPEMD.new(enc+k2).digest()
# If the hashes don't match, stop
if base64.b64decode(t) != H2:
return "Error: Hashes don't match! Your public key password is most likely incorrect. It is also possible, though improbable, that you selected the wrong encrypted image."
cipher = AES.new(k1)
message = cipher.decrypt(base64.b64decode(enc))
return message
def sha2_hmac(key, message): """ This is the PRF used in the RFC; an implementation of HMAC using SHA512 """ hashfunc = SHA512.new() opad = bytearray([0x5c]*blocksize) ipad = bytearray([0x36]*blocksize) key = bytearray(key) if len(key) > blocksize: hashfunc.update(bytearray(key)) #truncate key to blocksize if required key = bytearray(hashfunc.digest()) if len(key) < blocksize: key = key + bytearray([0x00]*(blocksize - len(key))) #pad right with 0s if needed o_key_pad = bytearray([a^b for a,b in zip(key, opad)]) #compute key XORs i_key_pad = bytearray([a^b for a,b in zip(key, ipad)]) hashfunc.update(i_key_pad + bytearray(message)) #internal hash ihash = bytearray(hashfunc.digest()) hashfunc = SHA512.new() #reset hash function for outer hash hashfunc.update(o_key_pad + ihash) ohash = hashfunc.digest() #inner hash result return bytearray(ohash) #return in byte array format
def _get_hash(obj):
"""
Returns a SHA512 object for the given object. Works in a similar fashion
to a Merkle tree (see https://en.wikipedia.org/wiki/Merkle_tree) should
the object be tree like in structure - but only returns the "root" hash.
"""
obj_type = type(obj)
if obj_type is dict:
hash_list = []
for k in sorted(obj):
hash_list.append(_get_hash(k).hexdigest())
hash_list.append(_get_hash(obj[k]).hexdigest())
seed = ''.join(hash_list)
return SHA512.new(seed)
elif obj_type is list:
hash_list = []
for item in obj:
hash_list.append(_get_hash(item).hexdigest())
seed = ''.join(hash_list)
return SHA512.new(seed)
elif obj_type is NoneType:
return SHA512.new('null')
elif obj_type is bool:
return SHA512.new(str(obj).lower())
else:
return SHA512.new(str(obj))
def otp():
if not request.json:
abort(400)
i9 = request.json['iv1']
i10 = request.json['iv2']
k9 = request.json['k9']
k10 = merchant.decrypt(request.json['k10'])
block1 = request.json['block1']
block2 = request.json['block2']
aes10 = AES.new(k10, AES.MODE_CFB, iv2)
decrypt_block2 = aes10.decrypt(block2)
authdata = decrypt_block2[:-128]
hash_authdata = decrypt_block1[-128:]
if SHA512.new(authdata).hexdigest() != hash_authdata:
return 'hash of auth doesnt match'
authdata = 'the customer is trying to send his otp, take it'
k11 = Random.get_random_bytes(16)
i11 = Random.get_random_bytes(16)
aes = AES.new(k11, AES.MODE_CFB, i11)
encrypted_authdata = aes.encrypt(authdata)
signed_auth_data = merchant.sign(encrypted_authdata)
encrypted_k11 = paymentgateway_publickey.encrypt(k11)
data = {'k11': k11, 'i7': i11, 'authdata': encrypted_authdata, 'hash_authdata': signed_auth_data,
'eotp': block1, 'k9': k9, 'i9': i9}
response = requests.post('http://loclahost:8002/otp', data=data)
data = response.json()
encrypt_auth_data = data['authdata']
signed_auth_data = data['signature']
auth_data_iv = data['iv']
kx = merchant.decrypt(data['kx'])
aes = AES.new(kx, AES.MODE_CFB, auth_data_iv)
auth_data = aes.decrypt(encrypt_auth_data)
if paymentgateway_publickey.verify(SHA512.new(auth_data).hexdigest(), signed_auth_data) == False:
return {'status': "couldnt verify paymentgateway response"}
if auth_data != 'everything is good':
return {'status': 'something went wrong while starting transaction'}
auth_data = 'everything is good'
iv = Random.get_random_bytes(16)
aes = AES.new(k10, AES.MODE_CFB, iv)
encrypted_authdata = aes.encrypt(auth_data)
signature = merchant.sign(SHA512.new(signature).hexdigest())
return {'iv': iv, 'authdata': encrypted_authdata, 'signature': signature}
def remunge(params, raw_uid):
"""Creates a new PGPv3 key and PGPv4 signature.
"""
n, e, d, p, q = params = [long(param) for param in params]
pubkey = v3pubkey(n, e)
restamped_pub = dumpbuffer(str(pubkey))[0]
raw_uid = (raw_uid.encode('utf-8')
if isinstance(raw_uid, unicode)
else raw_uid)
uid = (bytearray([0xb4]) +
bytearray(four_octet(len(raw_uid))) +
bytearray(raw_uid))
sigtohash = bytearray(
[0x04, # version
0x13, # type
0x01, # pub_algo
0x0a, # hash_algo == SHA512
0x00, # first octet of length
len(_HASHED_SUBPACKETS)]) + _HASHED_SUBPACKETS
sigtrailer = bytearray([0x04, 0xff, 0x00, 0x00, 0x00,
len(sigtohash)])
# (n, e, d, p, q)
#params = (sk.modulus, long(sk.exponent), sk.exponent_d,
# sk.prime_p, sk.prime_q)
rsa_key = RSA.construct(params)
signer = PKCS1_v1_5.new(rsa_key)
message = restamped_pub.raw_data + uid + sigtohash + sigtrailer
h = SHA512.new(bytes(message))
signature = signer.sign(h)
digest = h.digest()
new_sig = (sigtohash
+ chr(0)
+ chr(10)
+ chr(9) # Length of issuer subpacket; always 8 + 1
+ '\x10' # Issuer subpacket marker
+ long_to_bytes(long(restamped_pub.key_id, base=16))
+ digest[:2]
+ to_mpi(bytes_to_long(signature)))
new_sig = '\x89' + pack('>H', len(new_sig)) + new_sig
complete = bytes(bytearray().join([restamped_pub.raw_data,
b"\xb4" + chr(len(raw_uid)),
raw_uid, new_sig]))
with open(urlsafe_b64encode(SHA512.new(complete).digest()), 'w') as f:
f.write(complete)
return complete
def password():
if not request.json:
abort(400)
k5 = request.json['k5']
k6 = merchant.decrypt(request.json['k6'])
i5 = request.json['iv1']
i6 = request.json['i5']
block1 = request.json['block1']
block2 = request.json['block2']
aes6 = AES.new(k6, AES.MODE_CFB, i6)
decrypt_block2 = aes6.decrypt(block2)
authdata = decrypt_block2[:-128]
hash_authdata = decrypt_block1[-128:]
if SHA512.new(authdata).hexdigest() != hash_authdata:
return 'hash of auth doesnt match'
authdata = 'the customer is trying to send his pass, take it'
k7 = Random.get_random_bytes(16)
i7 = Random.get_random_bytes(16)
aes = AES.new(k7, AES.MODE_CFB, i7)
encrypted_authdata = aes.encrypt(authdata)
signed_auth_data = merchant.sign(SHA512.new(encrypted_authdata).hexdigest())
encrypted_k7 = paymentgateway_publickey.encrypt(k7)
data = {'k7': encrypted_k7, 'i7': i7, 'authdata': encrypted_authdata, 'hash_authdata': hash_authdata,
'epassword': block1, 'k5': k5, 'i5': i5}
response = requests.post('http://loclahost:8002/password', data=data)
data = response.json()
encrypt_auth_data = data['authdata']
signed_auth_data = data['signature']
auth_data_iv = data['iv']
k4 = merchant.decrypt(data['k4'])
aes = AES.new(k4, AES.MODE_CFB, auth_data_iv)
auth_data = aes.decrypt(encrypt_auth_data)
if paymentgateway_publickey.verify(SHA512.new(auth_data).hexdigest(), signed_auth_data) == False:
return {'status': "couldnt verify paymentgateway response"}
if auth_data != 'everything is good':
return {'status': 'something went wrong while starting transaction'}
auth_data = 'everything is good'
iv = Random.get_random_bytes(16)
aes = AES.new(k6, AES.MODE_CFB, iv)
encrypted_authdata = aes.encrypt(auth_data)
signature = merchant.sign(SHA512.new(signature).hexdigest())
return {'iv': iv, 'authdata': encrypted_authdata, 'signature': signature}
def random32(self):
""" Generate a random 32-bit integer. """
fmt = '<L'
N = struct.calcsize(fmt)
if len(self.bits) < N:
self.bits += _hash.new(self.hash).digest()
self.hash = _hash.new(self.hash).digest()
val = struct.unpack('<L', self.bits[:N])[0]
self.bits = self.bits[N:]
self.bits_used += 32
return val
def make_hash(data):
""" make hash
@param data:
@type data:
"""
sha = SHA512.new(data)
return sha.hexdigest()
def check_sign(self, data, signature, key):
"""验证签名"""
verifier = PKCS1_v1_5.new(key)
if verifier.verify(SHA512.new(data), signature):
print "the signature is authentic"
else:
print "the signature is not authentic"
def sha512(pw):
"""hash the password once; expands shorter passwords"""
h = SHA512.new()
lb = pack("> I", len(pw))
h.update(lb)
h.update(pw)
return h.digest()
def test_loopback(self):
hashed_msg = SHA512.new(b("test"))
signer = DSS.new(self.key_priv, 'fips-186-3')
signature = signer.sign(hashed_msg)
verifier = DSS.new(self.key_pub, 'fips-186-3')
verifier.verify(hashed_msg, signature)
def get_challenge(self):
'''
Generate a QR2Auth challenge.
A QR2Auth challenge consists of 128 random bits generated by PyCrypto
with StrongRandom.
These random bits are hashed with SHA512. This hash value represents
the challenge.
:return: A tuple containing the QR2Auth challenge as well as the range
of the OTP in the response hash value.
:rtype: tuple
'''
random_pool = StrongRandom()
nonce = random_pool.getrandbits(128)
nonce_hash = SHA512.new(str(nonce)).hexdigest()
self.__start = int(random_pool.randint(0, 128))
'''
Start and end of the range must be between 0 and the length of the hash
We use Sha512, so in this case start and end must be between
0 and 128
'''
self.__end = self.__start + self.__otp_length
if self.__end > len(nonce_hash):
self.__end = self.__end - len(nonce_hash)
self.__challenge = nonce_hash
return self.__challenge, self.__start, self.__end
def load_table_index(self,key): #FIXME no overlap check currently hash = SHA512.new(key); self.blockdevice.seek(0); self.blockdevice.seek(self._hash_to_location(hash.hexdigest())); hextowrite = ord(self.blockdevice.read(1)); self.indexlocation = hextowrite * (512 * 1024) + 2;
def TransactionInitialise(request):
# if request.user.is_authenticated():
id = request.POST.get('uid')
fee = request.POST.get('fees')
college_id = request.POST.get('college_id')
signature = request.POST.get('hash')
m = SHA512.new()
m.update(str(id).encode('utf-8'))
m.update(str(fee).encode('utf-8'))
m.update(str(college_id).encode('utf-8'))
# print(hush + str(type(hush))+' '+ m.hexdigest() + str(type(m.hexdigest())))
hash=m.hexdigest()
#print(m.hexdigest())
if clg_public_key.verify(hash,signature):
print(college_id)
college_id=key.decrypt(college_id)
acct = account_inst_map.objects.filter(institute_id=college_id)[0].account_no
# acct = account.objects.get(pk=acc_no)
# user=uuid.uuid()
id=key.decrypt(id)
fee=key.decrypt(fee)
print(id)
temp = temporary(uuid=id, account_no=acct, fees=fee)
# temp=temporary(uuid=a,accnt_num=b,fees=c,user=user)
temp.save()
context = {
'id': id,
'form': LoginForm()
}
return render_to_response('vasubank/payment_login.html', context, context_instance=RequestContext(request))
context = {
'message': 'DATA has been Tempered.',
}
return render_to_response('vasubank/invalid_trans.html', context, context_instance=RequestContext(request))
def test_loopback(self):
hashed_msg = SHA512.new(b("test"))
signer = DSS.new(self.key_priv, 'deterministic-rfc6979')
signature = signer.sign(hashed_msg)
verifier = DSS.new(self.key_pub, 'deterministic-rfc6979')
verifier.verify(hashed_msg, signature)
def convert(args: object) -> int:
""" Convert from sha256 hashed key to using a master key and encrypting the
master key with a password based key.
"""
filename = args.filename
password = get_pass("password", verify=False)
# Read the accounts dictionary into accounts_dict.
accounts_dict, encrypted_key, master_key = read_file(filename, password)
# Try to convert from old sha256 format to the new format.
print("Converting...", end="")
tmp_accounts_dict = {}
for account_hash, account_data in accounts_dict.items():
account_dict = crypt_to_dict_sha256(account_data, password=password, skip_invalid=True)
if account_dict:
new_account_data = dict_to_crypt(account_dict, master_key)
else:
raise (Exception("Invalid password. Can't convert."))
account_name = account_dict.get("Account Name", "")
new_account_hash = SHA512.new(account_name.encode()).hexdigest()
tmp_accounts_dict[new_account_hash] = new_account_data
write_file(filename, tmp_accounts_dict, encrypted_key)
print("Done.")
return 0
def compare_password(password, hash):
split = hash.split(':')
salt = base64.b64decode(split[0])
new_hash = SHA512.new()
new_hash.update(salt)
new_hash.update(password.encode('utf8'))
return is_equal(new_hash.digest(), base64.b64decode(split[1]))
def get_hash(
cls,
version: str,
frequency: int,
timestamp: int,
seed_value: str,
prev_output: str,
status_code: str,
) -> SHA512Hash:
"""
Given required properties from a NistBeaconValue,
compute the SHA512Hash object.
:param version: NistBeaconValue.version
:param frequency: NistBeaconValue.frequency
:param timestamp: NistBeaconValue.timestamp
:param seed_value: NistBeaconValue.seed_value
:param prev_output: NistBeaconValue.previous_output_value
:param status_code: NistBeaconValue.status_code
:return: SHA512 Hash for NistBeaconValue signature verification
"""
return SHA512.new(
version.encode() +
struct.pack(
'>1I1Q64s64s1I',
frequency,
timestamp,
binascii.a2b_hex(seed_value),
binascii.a2b_hex(prev_output),
int(status_code),
)
)
def construct_hash(value, timestamp, expires, name, meta):
"""
The hash is a SHA512 hash of the concatenated SHA512 hashes of the
msgpack encoded 'value', 'timetamp, 'expires', 'name' and 'meta'
fields (in that order).
It ensures that the 'value', 'timestamp', 'expires', 'name' and 'meta'
fields have not been tampered with.
"""
hashes = []
for item in (value, timestamp, expires, name, meta):
packed = msgpack.packb(item)
hashed = SHA512.new(packed).digest()
hashes.append(hashed)
compound_hashes = ''.join(hashes)
return SHA512.new(compound_hashes)
def sendfile(self, dst_link, filepath):
def _callback(err):
if self._ret_sendfile(filekey, err) and err != None:
with Auth.change_current_iden(self._idendesc, self._auth):
self.call(dst_link + "imc/", "abort_sendfile", 65536, filekey, err)
filekey = SHA512.new(uuid.uuid1().bytes + ssl.RAND_bytes(64)).hexdigest()
filesize = os.stat(filepath).st_size
fileresult = FileResult(filekey)
self._info_filekeymap[filekey] = {
"filesize": filesize,
"filepath": filepath,
"fileresult": fileresult,
"timer": self._ioloop.add_timeout(
datetime.timedelta(days=1), lambda: self._ret_sendfile(filekey, "Etimeout")
),
"callback": tornado.stack_context.wrap(_callback),
}
with Auth.change_current_iden(self._idendesc, self._auth):
stat, ret = self.call(dst_link + "imc/", "pend_recvfile", 65536, self._link, filekey, filesize)
if stat == False:
self._ret_sendfile(filekey, "Enoexist")
return fileresult
def addUser(self, user):
keygen = MD5.new()
passgen = SHA512.new()
keygen.update(user.getPassword().encode("UTF-8"))
passgen.update(user.getPassword().encode("UTF-8"))
key = keygen.hexdigest()
pWord = passgen.hexdigest()
uName = self.CIPHER.encrypt(user.getUsername(), key)
query = """
SELECT {0}, {1}, {2}, {3}, {4}
FROM {5}
WHERE
Username = '******' AND
Password = '******';
""".format(Con.DB_USERS_ID, Con.DB_USERS_FIRSTNAME, Con.DB_USERS_LASTNAME, Con.DB_USERS_USERNAME, Con.DB_USERS_PASSWORD, Con.DB_USERS, uName, pWord)
for row in self.CURSOR.execute(query):
raise DatabaseError(Con.ERROR_DATABASE_USER_ALREADY_REGISTRATED)
return
fName = self.CIPHER.encrypt(user.getFirstName(), key)
lName = self.CIPHER.encrypt(user.getLastName(), key)
query = """
INSERT INTO {0}
({1}, {2}, {3}, {4})
VALUES
("{5}", "{6}", "{7}", "{8}");
""".format(Con.DB_USERS, Con.DB_USERS_FIRSTNAME, Con.DB_USERS_LASTNAME, Con.DB_USERS_USERNAME, Con.DB_USERS_PASSWORD, fName, lName, uName, pWord)
self.CONN.execute(query)
self.CONN.commit()
return self.login(user)
def encrypt(v, encrypt_rsapubkey=None, sign_rsaprivkey=None):
from Crypto.PublicKey import RSA
from Crypto.Cipher import PKCS1_OAEP
from Crypto.Cipher import AES
from Crypto.Signature import PKCS1_PSS
from Crypto.Hash import SHA512
out = {}
if encrypt_rsapubkey:
encrypt_rsapubkey = RSA.importKey(encrypt_rsapubkey)
rsa = PKCS1_OAEP.new(encrypt_rsapubkey)
aeskey = randomString(32)
iv = randomString(16)
aes = AES.new(aeskey, AES.MODE_CBC, iv)
data = varEncode(v).tostring()
data += "\x00" * (-len(data) % 16)
out["aesInfo"] = rsa.encrypt(aeskey + iv)
out["data"] = aes.encrypt(data)
out["encrypted"] = True
else:
out["data"] = varEncode(v).tostring()
out["encrypted"] = False
if sign_rsaprivkey:
sign_rsaprivkey = RSA.importKey(sign_rsaprivkey)
pss = PKCS1_PSS.new(sign_rsaprivkey)
h = SHA512.new()
h.update(out["data"])
sign = pss.sign(h)
out["signature"] = sign
else:
out["signature"] = None
return out
def crypto_hash_sha512(data):
"""
调用 Crypto 库的 sha512 函数进行哈希操作
:param data: 待哈希的数值, 比如 b"test_hash"
:return: "5a32f0967623012cdd4c29257f808f3f209184e992c39dc6d931f89831e7b1eb9379f9e3a20da09eb06d0ca53bd9c0845dda91baed17a713c0cac8a24259c0b9"
"""
return SHA512.new(data).hexdigest()
def send(self, obj, commit = False):
msg = {'msg' : obj}
if not commit:
logger.info('[+] Sending: {0}'.format(msg['msg']))
else:
msg['COMMIT'] = obj
# serialize input
data = pickle.dumps(obj)
# padding
pad = AES.block_size - len(data) % AES.block_size
# create an header [pck length (4 bytes), pad length (1 byte), random (3 bytes))]
plaintext = pack('>IB', len(data) + pad + SHA512.digest_size, pad)
plaintext += Random.new().read(AES.block_size - len(plaintext))
# add payload plus padding
plaintext += data
plaintext += Random.new().read(pad)
# encryption
ciphertext = self.cipher_out.encrypt(plaintext)
# integrity
hsha = HMAC.new(self.key_hmac_out, digestmod=SHA512.new())
hsha.update(plaintext)
hsha.update(pack('>I', self.seq_out))
self.seq_out = (self.seq_out + 1) & 0xFFFFFFFF
ciphertext += hsha.digest()
self.socket.sendall(ciphertext)
def insert_encrypted_file(file, master_password):
filename = file.path
obj = SHA256.new()
obj.update(file.author)
obj.update(filename)
obj.update(file.title)
title = obj.hexdigest()
obj_pass = SHA512.new()
obj_pass.update(file.author)
obj_pass.update(master_password)
obj_pass.update(file.title)
encfs_password = obj_pass.hexdigest()
mount_f = media_dir + os.path.sep + mount_dir + os.path.sep + title
store_f = media_dir + os.path.sep + store_dir + os.path.sep + title
print store_f
if os.path.exists(store_f):
return
if not os.path.exists(mount_f):
os.makedirs(mount_f)
if not os.path.exists(store_f):
os.makedirs(store_f)
subprocess.call(["expect", "encfs.exp", encfs_password, os.path.abspath(mount_f), os.path.abspath(store_f)],
stdout=subprocess.PIPE, stderr=subprocess.PIPE)
subprocess.call(["fusermount","-z","-u", os.path.abspath(mount_f)])
subprocess.call(["/bin/sh", "-c", 'echo '+encfs_password+' | encfs -S -o allow_root --idle=1 '+os.path.abspath(store_f)+' '+os.path.abspath(mount_f)])
shutil.copyfile("../media/" + filename, mount_f + os.path.sep + filename)
def hash(*args): """ Update a new SHA512 hash with one argument at a time, and return that hash. """ h = SHA512.new() for arg in args: h.update(arg) return h.digest()
def create_table_index(self,key):
#FIXME no overlap check currently
hash = SHA512.new(key);
self.blockdevice.seek(0);
self.blockdevice.seek(self._hash_to_location(hash.hexdigest()));
hextowrite = random.randint(2,255);
self.blockdevice.write('%c' % hextowrite);
self.indexlocation = hextowrite * (512 * 1024) + 2;
def test_verify_true(self):
decryption = Decryption(self.recipient_key, self.sender_key)
message = 'ERROR=aA321\nTOKEN=e975ffc4f0605ddf3afc299eee6aeffb59efba24769548acf58e34a89ae4e228\n'
hash = SHA512.new(message)
signer = PKCS1_v1_5.new(self.sender_key_private)
signature = signer.sign(hash)
self.assertTrue(decryption.verify(signature, message))
def __init__( self, key ): self.BS = 16 self.pad = lambda s: s + (self.BS - len(s) % self.BS) * chr(self.BS - len(s) % self.BS) self.unpad = lambda s : s[0:-ord(s[-1])] h = SHA512.new() h.update(str(key)) self.key = h.hexdigest()[:16]
def prompt(self):
username = raw_input("username: ")
password = getpass('password: ')
# generate key from username/password
key = PBKDF2(password, SHA512.new(username).hexdigest(), dkLen=32, count=20000)
# hmac
hmac = HMAC.new(key, msg=username, digestmod=SHA512).hexdigest()
return (key, hmac)
def digSig(sigKey, string):
# TODO: return the signature of the file
# First, lets compute the SHA-512 hash of the data
dataHash = SHA512.new(string).digest()
# Lets generate the signature by encrypting our hash with the private key
dataSig = sigKey.sign(dataHash, '')
# Return the signature of the file
return dataSig
def verify_signature(key, text):
msg = text[:32]
h = SHA512.new(msg)
signature = text[32:]
try:
PKCS1_v1_5.new(key).verify(h, signature)
return True
except (ValueError, TypeError):
return False
def get_retid():
global gr_idmap
global ret_idmap
gr = greenlet.getcurrent()
grid = id(gr)
retid = SHA512.new(uuid.uuid1().bytes + ssl.RAND_bytes(64)).hexdigest()
gr_idmap[grid].add(retid)
ret_idmap[retid] = gr
return retid
def __extend_key(self):
key = ''
h = SHA512.new()
h.update(self.key)
key += h.digest()
h.update(self.key)
key += h.digest()
h.update(self.key)
key += h.digest()
h.update(self.key)
key += h.digest()
self.key = key
def verify(data, sign):
if not (os.path.isfile("public.key") and os.path.isfile("private.key")):
print "[!] Key has not generated"
generateKey()
f = open("public.key", 'rb')
key = RSA.importKey(f.read())
signer = PKCS1_v1_5.new(key)
hash = SHA512.new(data)
f.close()
return signer.verify(hash, sign)
def generate_master_key(self): # Get hex code self.digest = SHA512.new(Random.get_random_bytes(1024)).hexdigest(); prefix = '04358394' if self.testnet == True else '0488ade4' hex = prefix + '00' + '00000000' + '00000000' + self.digest[:64] + '00' + self.digest[64:] # BASE58 encode + checksum master_key = b58encode_checksum(unhexlify(hex)); # Generate child key return self.derive_child(master_key, '0', True)
def _sign(self, body, algo="SHA-1"):
signer = PKCS1_v1_5.new(self._private_key)
if algo == "SHA-1":
digest = SHA.new()
else:
digest = SHA512.new()
digest.update(body)
try:
signature = signer.sign(digest)
except Exception as err:
raise Exception("Could not make sign. " + str(err))
return signature
def build_authorization_header(self):
"""Build authorization headers."""
if len(self.required_authorization_headers) > 0:
self.authorization_parameters['headers'] = '{}'.format(' '.join([
header.lower()
for header in self.required_authorization_headers
]))
self.build_signing_string()
signing_bytestring = self.signing_string.encode(self.encoding)
if self.signing_algorithm == 'RSA':
signer = RSA.import_key(self.private_key_string)
if self.hashing_algorithm == 'SHA256':
hash_obj = SHA256.new(signing_bytestring)
elif self.hashing_algorithm == 'SHA512':
hash_obj = SHA512.new(signing_bytestring)
else:
raise Exception("Invalid key type")
signature = pkcs1_15.new(signer).sign(hash_obj)
else:
private_key, public_key = PEMEncoder.decode_private_key(
self.private_key_string)
if self.hashing_algorithm == 'SHA256':
hash_function = hashlib.sha256
elif self.hashing_algorithm == 'SHA512':
hash_function = hashlib.sha512
else:
raise Exception("Invalid key type")
if self.signing_algorithm.lower() == 'p256':
r, s = ecdsa.sign(signing_bytestring,
private_key,
curve=curve.P256,
hashfunc=hash_function)
else:
raise Exception("Invalid key type")
signature = DEREncoder.encode_signature(r, s)
base64_signature = base64.b64encode(signature).decode(self.encoding)
self.authorization_parameters['signature'] = '{}'.format(
base64_signature)
authorization_rows = []
for key, value in self.authorization_parameters.items():
if isinstance(value, str):
authorization_rows.append('{}="{}"'.format(key, value))
elif isinstance(value, int) or isinstance(value, float):
authorization_rows.append('{}={}'.format(key, value))
elif isinstance(value, bool):
if value is True:
authorization_rows.append('{}=true')
else:
authorization_rows.append('{}=false')
authorization_header = 'Signature {}'.format(
','.join(authorization_rows))
self.headers['Authorization'] = authorization_header
def encrypt_textfile(file, key, pvt_key):
# AES_encrypt part
print("\nencrypt_textfile_function")
# open file txt
with open(file, 'r') as f:
fp = f.read()
print("text: ", fp)
# open file AES key
with open(key, 'rb') as f:
k = f.read()
# get AES key to encrypt text
cipher = AES.new(k, AES.MODE_EAX)
iv = cipher.nonce
ciphertext, tag = cipher.encrypt_and_digest(fp.encode('UTF-8'))
print("iv : ", iv)
print("ciphertext : ", ciphertext)
# len iv = 16 | tag = 16
ciphertext = iv + tag + ciphertext
print("ciphertext_encrypt : ", ciphertext)
# save file text encrypt
with open('AES_encrypt.txt', 'wb') as f:
f.write(ciphertext)
# Digital_Signal Part
print("\nencrypt_signature_function")
#get private Key from file
private_key = RSA.import_key(open(pvt_key).read())
# hash 512
digest = SHA512.new()
digest.update(ciphertext)
with open('hash', 'wb') as f:
f.write(digest.digest())
# sign with private key
signer = PKCS1_v1_5.new(private_key)
sig = signer.sign(digest)
print("Signature : ", sig)
with open('digital_signature', 'wb') as f:
f.write(sig)
f.close
def do_creater(self, inp: str):
''' Create a Repo. \n Usage: creater <repo name>'''
parsed_prompt = IGCMD.prompt.split()
if len(inp) > 0 and len(parsed_prompt) > 1:
#admin
admin = parsed_prompt[1]
l_inp = len(admin)
admin = str(admin[:l_inp - 1])
#create client random
cr_b = get_random_bytes(64)
cr = SHA512.new(cr_b).hexdigest()
try:
res = requests.post('https://localhost:5683/create_repo',
json={
'repo_name': inp,
'cr': cr,
'admin': admin
},
verify=certpath + 'ca-public-key.pem')
except ConnectionError:
print(
' Connection Error: Please check validity of the repo...')
json_data: dict = json.loads(res.text)
# print(json_data)
repo_name = json_data.get('repo_name', None)
status = json_data.get('status', None)
if status == 'OK' and repo_name is not None:
print(f'Repo Created : {repo_name}')
#create a local repo
c_path = os.path.join('src', 'dbctest', repo_name)
os.mkdir(c_path)
c_repo = Repo.init(c_path)
with open(c_path + "/README.md", 'x') as readme:
readme.write('#' + repo_name)
c_repo.index.add("README.md")
c_repo.index.commit("Initial commit")
self.do_pushr(repo_name)
elif status != 'OK':
print(f'{status}')
else:
print(f'{res.text}')
elif len(inp) > 0 and len(parsed_prompt) == 1:
print('*** Login to create a repo')
else:
print('*** Too Less Arguments')
def verifyresponse(self, message):
idx = message.find('|')
if idx == -1:
return True
signed_message = message[:idx]
original_message = message[idx+1:]
key = RSA.importKey(self.serverkey)
signer = PKCS1_v1_5.new(key)
digest = SHA512.new()
digest.update(original_message)
if signer.verify(digest, base64.b64decode(signed_message + "=" * ((4 - len(signed_message) % 4) % 4))):
return True
def _verify(self, data, sig):
h = SHA512.new(data)
hs = h.hexdigest()
if hs in self._cache_hashmap:
return True
if self._verifier.verify(h, sig) == True:
self._cache_hashmap.add(hs)
return True
else:
return False
def getFileSig(fileName, privKey, algorithm):
# 1. Open the file
# 2. Read the contents
# 3. Compute the SHA-512 hash of the contents
# 4. Sign the hash computed in using the digSig() function you implemented.
# 5. Return the signed hash; this is your digital signature
with open(fileName) as f:
content = f.read()
# Compute the SHA-512 hash of the contents
content_hash = SHA512.new(content)
# Sign the computed hash
signed_hash = digSig(privKey, content_hash, algorithm)
return signed_hash,
def generateHashUsingSHA512(fileName):
print("SHA_512")
data = getData(fileName)
data = bytes(data, "utf-8")
start = timer()
h = SHA512.new()
h.update(data)
#Because this looks better when viewed instead of h.digest()
digest = h.hexdigest()
end = timer()
#print(digest)
print("Time Taken to generate Hash is ", (end - start))
print("Time Taken to Hash per byte is ", (end - start) / len(data))
def protectEntry(name1, name2, birthdate, debug=False):
"""
Protects a single record of demographic info by applying SHA512.
"""
assert (type(birthdate) is date)
name = "".join([x for x in [name1, name2] if x is not None])
sha = SHA512.new(data=name)
sha.update(birthdate.isoformat())
if debug:
print name + birthdate.isoformat()
return b64enc(sha.digest())
def verify_rsa_sha512_checksum(pubkey: str, data: bytes, checksum: str):
"""Verify your data and the callback checksum from SBER.
Using asymmetric method: RSA SHA512 to encrypt the data
https://securepayments.sberbank.ru/wiki/doku.php/integration:api:callback:start
Returns:
bool: verified or not
"""
key = RSA.import_key(pubkey)
signer = PKCS1_v1_5.new(key)
digest = SHA512.new(data=data)
return signer.verify(digest, unhexlify(checksum.lower()))
def sign(self, message):
signer = PKCS1_v1_5.new(self.private_key)
if (self.hash_alg == self.HASH_ALG_SHA_512):
digest = SHA512.new()
elif (self.hash_alg == self.HASH_ALG_SHA_384):
digest = SHA384.new()
elif (self.hash_alg == self.HASH_ALG_SHA_256):
digest = SHA256.new()
else:
raise Exception("Unknown hash algorithm '%s'" % (self.hash_alg, ))
digest.update(message)
return b64encode(signer.sign(digest))
def sintese(algoritmo, data):
if algoritmo == "SHA-256":
h = SHA256.new(data)
elif algoritmo == "SHA-512":
h = SHA512.new(data)
else:
print("ERROR: Unsupported algorithm")
sys.exit(0)
return h.hexdigest()
def calculate_dh_secret(their_public, my_private):
# Calculate the shared secret using Diffie-Hellman key exchange algorithm
shared_secret = str((their_public**my_private) % prime)
# Hash the value to SHA512 so that:
# (a) There's no bias in the bits of the output
# (there may be bias if the shared secret is used raw)
# (b) Converting to raw bytes is easier
# (c) Adding additional information is easier
#Hashed with SHA512
shared_hash = SHA512.new(bytes(shared_secret, "ascii")).hexdigest()
return shared_hash
def verify(self, message, signature):
signer = PKCS1_v1_5.new(self.public_key)
if (self.hash_alg == self.HASH_ALG_SHA_512):
digest = SHA512.new()
elif (self.hash_alg == self.HASH_ALG_SHA_384):
digest = SHA384.new()
elif (self.hash_alg == self.HASH_ALG_SHA_256):
digest = SHA256.new()
else:
raise Exception("Unknown hash algorithm '%s'" % (self.hash_alg, ))
digest.update(message)
return signer.verify(digest, b64decode(signature))
def verify(pk, msg, sig):
'''
check sign is made for msg using public key PK, string MSG,
and byte string SIGN.
suppose publicExponent is fixed at 0x10001.
return boolean
'''
msgHash = SHA512.new(msg.encode("UTF-8"))
try:
pkcs1_15.new(pk).verify(msgHash, bytes.fromhex(sig))
return True
except (ValueError, TypeError):
return False
def _get_hash(hash_alg: str = DEFAULT_HASH_ALG) -> Any:
if hash_alg == "SHA-512":
digest = SHA512.new()
elif hash_alg == "SHA-384":
digest = SHA384.new()
elif hash_alg == "SHA-256":
digest = SHA256.new()
elif hash_alg == "SHA-1":
digest = SHA.new()
else:
digest = MD5.new()
return digest
def verify_nonce(args):
"Verify a lot of nonoces. This is to counter ccontext switch time"
data, nonce_list, n_zeros = args
valid = False
valid_nonce = None
for nonce in nonce_list:
string = '{} {}'.format(data, nonce)
hsh = SHA512.new(string.encode()).hexdigest()
valid = all(i == '0' for i in hsh[:n_zeros])
if valid:
valid_nonce = nonce
break
return valid_nonce, valid
def handlingSignupEvent():
username = txtUsername.get()
password = txtPassword.get().encode()
# print(username)
# print(password)
func = np.random.randint(4) # generate a random integer from 0 to 3
# print(func)
if func == 0:
passEncrypted = MD5.new(password)
elif func == 1:
passEncrypted = SHA1.new(password)
elif func == 2:
passEncrypted = SHA256.new(password)
elif func == 3:
passEncrypted = SHA512.new(password)
passEncrypted = passEncrypted.hexdigest().upper()
# print(passEncrypted)
if os.path.isfile("../data/database.csv"):
# print("File existed")
if existedUser(username):
messagebox.showinfo("Thông báo", "Tên đăng nhập đã tồn tại!")
return
userInfo = {'Username': username, 'Password': passEncrypted}
df = pd.DataFrame(userInfo,
columns=['Username', 'Password'],
index=['Username'])
df.to_csv("../data/database.csv",
index=False,
header=None,
sep='\t',
mode='a')
messagebox.showinfo("Thông báo", "Bạn đã tạo tài khoản thành công!")
else:
# print("File did not exist")
userInfo = {'Username': username, 'Password': passEncrypted}
df = pd.DataFrame(userInfo,
columns=['Username', 'Password'],
index=['Username'])
df.to_csv("../data/database.csv", index=False, header=None, sep='\t')
messagebox.showinfo("Thông báo", "Bạn đã tạo tài khoản thành công!")
def _encrypt(self, passwd, pubkey, selected_block=None, fast=True):
# Read public key
try:
PUBkey = RSA.importKey(open(pubkey, "r").read())
except FileNotFoundError:
raise ValueError('No such file or directory : {}'.format(pubkey))
except ValueError:
raise KeyError('Wrong key format')
except PermissionError:
raise PermissionError('Read permission denied : {}'.format(pubkey))
if PUBkey.has_private(): raise KeyError('Wrong key format')
# Select a valid block as symetric key
if selected_block == None: selected_block = self.selectBlock()
else:
if type(selected_block) != int:
raise ValueError('The selected block must be an int')
if selected_block > len(self.blocks) - 1 or selected_block < 0:
raise ValueError(
'The selected block ({}) must satisfy :\n\t{}\n\t{}'.
format(selected_block,
'selected block <= {}'.format(len(self.blocks) - 1),
'selected block >= 0'))
# Padding
block_size = len(self.blocks[-1])
self.blocks[-1] = self.blocks[-1] + os.urandom(self.chunkSize -
block_size)
#Get the symetric encryptor
hash_sha = SHA256.new(self.blocks[selected_block] +
bytes(passwd, encoding='utf-8')).digest()
hash_sha_sha = SHA.new(hash_sha).digest()
encryptor = AES.new(hash_sha, AES.MODE_ECB, "")
# Store the info
self.info['fast'] = fast
self.info['padding'] = self.chunkSize - block_size
self.info['challenge'] = hash_sha_sha
self.info['auth'] = SHA512.new(
bytes('{}{}{}'.format(hash_sha_sha.hex(), selected_block, passwd),
encoding='utf-8')).digest()
# Encrypt the file
for i, b in enumerate(self.blocks):
self.blocks[i] = PUBkey.encrypt(
b, 32)[0] if (i == selected_block) else encryptor.encrypt(b)
self.status = "encrypted"
return self
def validate_sign(public_certificate, key, cipher_text):
cipher_text = b64decode(cipher_text)
if hasattr(key, 'encode'):
key = key.encode()
digest = SHA512.new()
digest.update(key)
pub_key = RSA.importKey(public_certificate)
verifier = PKCS1_v1_5.new(pub_key)
result = verifier.verify(digest, cipher_text)
logger.debug("validate_sign %i " % (result, ))
return result
def verify(message, signature, pub_key):
signer = PKCS1_v1_5.new(pub_key)
if (hash == "SHA-512"):
digest = SHA512.new()
elif (hash == "SHA-384"):
digest = SHA384.new()
elif (hash == "SHA-256"):
digest = SHA256.new()
elif (hash == "SHA-1"):
digest = SHA.new()
else:
digest = MD5.new()
digest.update(message)
return signer.verify(digest, signature)
def RealmKeyDerivation(master_key, realm="", shard=""):
if len(realm) < 1:
raise ValueError("The realm label is missing or invalid.")
elif len(shard) != 64:
raise ValueError("The shard length is not 64 octets.")
elif len(master_key) != 64 != 64:
raise ValueError("The master key length is not 64 octets.")
hashed = SHA512.new(master_key + realm + shard).digest()
realm_key = str().join(chr(operator.xor(ord(a), ord(b))) \
for a,b in zip(hashed, shard))
return realm_key
def verifyFileSig(fileName, pubKey, signature):
verifySign = None
# TODO:
# 1. Read the contents of the input file (fileName)
with open(fileName, 'r') as myFile:
readFile = myFile.read()
# 2. Compute the SHA-512 hash of the contents
hashedData = SHA512.new(readFile).hexdigest()
# 3. Use the verifySig function you implemented in
# order to verify the file signature
verifySign = verifySig(hashedData, signature, pubKey)
# 4. Return the result of the verification i.e.,
# True if matches and False if it does not match
return verifySign
def getFileSig(fileName, privKey):
# TODO:
# 1. Open the file
# 2. Read the contents
with open(fileName, 'r') as myFile:
readFile = myFile.read()
# 3. Compute the SHA-512 hash of the contents
hashedData = SHA512.new(readFile).hexdigest()
# 4. Sign the hash computed in 4. using the digSig() function
# you implemented.
signedHash = digSig(privKey, hashedData)
# 5. Return the signed hash; this is your digital signature
return signedHash