def verify(self, received_mac_tag):
"""Validate the *binary* MAC tag.
The caller invokes this function at the very end.
This method checks if the decrypted message is indeed valid
(that is, if the key is correct) and it has not been
tampered with while in transit.
:Parameters:
received_mac_tag : byte string
This is the *binary* MAC, as received from the sender.
:Raises ValueError:
if the MAC does not match. The message has been tampered with
or the key is incorrect.
"""
if self.verify not in self._next:
raise TypeError("verify() cannot be called"
" when encrypting a message")
self._next = [self.verify]
if self._mac_tag is None:
self._mac_tag = self._kdf.derive()
# Constant-time comparison
if SHA3.new(self._mac_tag).digest() != SHA3.new(received_mac_tag).digest():
raise ValueError("MAC check failed")
def test_update_after_digest(self):
msg=b("rrrrttt")
# Normally, update() cannot be done after digest()
h = SHA3.new(data=msg[:4])
dig1 = h.digest()
self.assertRaises(TypeError, h.update, msg[4:])
dig2 = SHA3.new(data=msg).digest()
# With the proper flag, it is allowed
h = SHA3.new(data=msg[:4], update_after_digest=True)
self.assertEquals(h.digest(), dig1)
# ... and the subsequent digest applies to the entire message
# up to that point
h.update(msg[4:])
self.assertEquals(h.digest(), dig2)
def get_sha3_224(self):
hash_obj = SHA3_224.new()
hash_obj.update(self.value)
return {
"digest": hash_obj.digest(),
"hexdigets": hash_obj.hexdigest()
}
def __init__(self, signatureFile, hashAlgorithm, keyLength, privateKeyE):
self.signatureFile = open(signatureFile, "w")
self.hashAlgorithmName = hashAlgorithm
self.keyLength = keyLength
self.privateKey = privateKeyE #tuple of (n, e, d)
if hashAlgorithm == 'SHA-2-224':
self.hashAlgorithm = SHA224.new()
elif hashAlgorithm == 'SHA-2-256':
self.hashAlgorithm = SHA256.new()
elif hashAlgorithm == 'SHA-2-384':
self.hashAlgorithm = SHA384.new()
elif hashAlgorithm == 'SHA-2-512':
self.hashAlgorithm = SHA512.new()
elif hashAlgorithm == 'SHA-3-224':
self.hashAlgorithm = SHA3_224.new()
elif hashAlgorithm == 'SHA-3-256':
self.hashAlgorithm = SHA3_256.new()
elif hashAlgorithm == 'SHA-2-384':
self.hashAlgorithm = SHA3_384.new()
elif hashAlgorithm == 'SHA-2-256':
self.hashAlgorithm = SHA3_512.new()
else:
raise Exception("Invalid hash function: " + hashAlgorithm)
def test_update_after_digest(self):
msg = b("rrrrttt")
# Normally, update() cannot be done after digest()
h = SHA3.new(data=msg[:4])
dig1 = h.digest()
self.assertRaises(TypeError, h.update, msg[4:])
dig2 = SHA3.new(data=msg).digest()
# With the proper flag, it is allowed
h = SHA3.new(data=msg[:4], update_after_digest=True)
self.assertEqual(h.digest(), dig1)
# ... and the subsequent digest applies to the entire message
# up to that point
h.update(msg[4:])
self.assertEqual(h.digest(), dig2)
def get_sha3_224(data: str) -> dict:
"""
Returns the SHA3_224 hash value (hex).
"""
sha3_224_call = SHA3_224.new()
sha3_224_call.update(data.encode('utf-8'))
return {"SHA3_224_hex": sha3_224_call.hexdigest()}
def switch_dict(size):
return {
224: SHA3_224.new(objectToHash.encode('utf-8')),
256: SHA3_256.new(objectToHash.encode('utf-8')),
384: SHA3_384.new(objectToHash.encode('utf-8')),
512: SHA3_512.new(objectToHash.encode('utf-8'))
}.get(size, None)
def kex(self, data):
if len(data) < 4:
return False
reqlen, noncelen = struct.unpack_from('<HH', data.peek(4))
if len(data) < 4 + reqlen + noncelen:
return False
data.drain(4)
request = data.read(reqlen)
remote_nonce = data.read(noncelen)
if self.privkey:
response, key = self.encoder.process_kex_request(request, 0)
# Add jitter, tinyec is quite horrible
time.sleep(random.random())
nonce = get_random_bytes(16)
self.downstream.write(
struct.pack('<HH', len(response), len(nonce)) + response +
nonce)
else:
key = self.encoder.process_kex_response(request, 0)
nonce = self.nonce
eh = SHA3_224.new()
eh.update(key[0])
eh.update(remote_nonce)
ek = eh.digest()[:16]
dh = SHA3_224.new()
dh.update(key[1])
dh.update(nonce)
dk = dh.digest()[:16]
self.key = (ek, dk)
self.encryptor = AES.new(key=self.key[0],
mode=AES.MODE_GCM,
nonce=nonce)
self.decryptor = AES.new(key=self.key[1],
mode=AES.MODE_GCM,
nonce=remote_nonce)
return True
def update_decryptor(self, vblock):
self.decryptor.verify(vblock)
h = SHA3_224.new()
h.update(self.key[1])
h.update(vblock)
self.decryptor = AES.new(key=self.key[1],
mode=AES.MODE_GCM,
nonce=h.digest())
def testSignature(signatureFile, originalFile, pubFile):
pubKeyL, n, e = readPublicKey(pubFile)
public_key = RSA.construct((n, e))
verifier = PKCS1_v1_5.new(public_key)
fileName, hashed, key, signature = readSignature(signatureFile)
(hashing, hashingKeyL) = hashed
(enc, encKeyL) = key
assert fileName == originalFile
assert enc == 'RSA'
assert encKeyL == pubKeyL
hashAlgorithm = hashing + "-" + str(hashingKeyL)
if hashAlgorithm == 'SHA-2-224':
hashAlgorithm = SHA224.new()
elif hashAlgorithm == 'SHA-2-256':
hashAlgorithm = SHA256.new()
elif hashAlgorithm == 'SHA-2-384':
hashAlgorithm = SHA384.new()
elif hashAlgorithm == 'SHA-2-512':
hashAlgorithm = SHA512.new()
elif hashAlgorithm == 'SHA-3-224':
hashAlgorithm = SHA3_224.new()
elif hashAlgorithm == 'SHA-3-256':
hashAlgorithm = SHA3_256.new()
elif hashAlgorithm == 'SHA-2-384':
hashAlgorithm = SHA3_384.new()
elif hashAlgorithm == 'SHA-2-256':
hashAlgorithm = SHA3_512.new()
else:
raise Exception("Invalid hash function: " + hashAlgorithm)
data = open(originalFile, "rb").read()
hashAlgorithm.update(data)
assert verifier.verify(hashAlgorithm, signature)
print("SIGNATURE TEST SUCCESSFUL!!")
def get_hash(msg, hash_size):
if hash_size == "224":
hash = SHA3_224.new(msg)
if hash_size == "256":
hash = SHA3_256.new(msg)
if hash_size == "384":
hash = SHA3_384.new(msg)
if hash_size == "512":
hash = SHA3_512.new(msg)
return hash
def testSeal_verification(signatureFile, envelopeFile, pubFile):
pubKeyL, n, e = readPublicKey(pubFile)
public_key = RSA.construct((n, e))
verifier = PKCS1_v1_5.new(public_key)
fileName, hashed, key, signature = readSignature(signatureFile)
(hashing, hashingKeyL) = hashed
(enc, encKeyL) = key
assert enc == 'RSA'
assert encKeyL == pubKeyL
hashAlgorithm = hashing + "-" + str(hashingKeyL)
if hashAlgorithm == 'SHA-2-224':
hashAlgorithm = SHA224.new()
elif hashAlgorithm == 'SHA-2-256':
hashAlgorithm = SHA256.new()
elif hashAlgorithm == 'SHA-2-384':
hashAlgorithm = SHA384.new()
elif hashAlgorithm == 'SHA-2-512':
hashAlgorithm = SHA512.new()
elif hashAlgorithm == 'SHA-3-224':
hashAlgorithm = SHA3_224.new()
elif hashAlgorithm == 'SHA-3-256':
hashAlgorithm = SHA3_256.new()
elif hashAlgorithm == 'SHA-2-384':
hashAlgorithm = SHA3_384.new()
elif hashAlgorithm == 'SHA-2-256':
hashAlgorithm = SHA3_512.new()
else:
raise Exception("Invalid hash function: " + hashAlgorithm)
fileName, simConf, rsaConf, data, cryptKey, mode, iv = readEnvelope(
envelopeFile)
hashAlgorithm.update(data + cryptKey)
assert verifier.verify(hashAlgorithm, signature)
print("SEAL SIGNATURE TEST SUCCESSFUL!!")
def update_encryptor(self):
vblock = self.encryptor.digest()
h = SHA3_224.new()
h.update(self.key[0])
h.update(vblock)
self.encryptor = AES.new(key=self.key[0],
mode=AES.MODE_GCM,
nonce=h.digest())
return vblock
from Crypto.Hash import SHA3_224
import math
h_obj = SHA3_224.new()
h_obj.update(b'4933601832480809353473354884041175248572605852782963066896748056885475641656749621629491905191014868618662270686970232166446509470324736864650682101529030248099045013028061692922691724625514706329230172429768068340125863618218559912413117007754845075429408372888507551698514494498492001013849289727206925716097505112821640035328796287477288832274302228451772267834762720729040136679341742771582480873438819854901251010698577442809438919694733749250049741106149694027735988626092669792535204681665271762659664614542674529824442558625688825977054069126171946431554677605767056236181410658731273842816008767266250489001' )
print (h_obj.hexdigest())
p=168199388701209853920129085113302407023173962717160229197318545484823101018386724351964316301278642143567435810448472465887143222934545154943005714265124445244247988777471773193847131514083030740407543233616696550197643519458134465700691569680905568000063025830089599260400096259430726498683087138415465107499
k=8
q=959452661475451209325433595634941112150003865821
g=94389192776327398589845326980349814526433869093412782345430946059206568804005181600855825906142967271872548375877738949875812540433223444968461350789461385043775029963900638123183435133537262152973355498432995364505138912569755859623649866375135353179362670798771770711847430626954864269888988371113567502852
r=((g**k)%p)%q
print(r)
x=432398415306986194693973996870836079581453988813
inverse_mod=359794748053294203497037598363102917056251449683
u=(int(h_obj.hexdigest(),16)-(x*r))*inverse_mod
v=int(h_obj.hexdigest(),16)
print(v)
s=(u%q)
print("the value of s:",s)
import random
import math
import string
from Crypto.Hash import SHA3_224
#nonce = random.getrandbits(128)
nonce = 23290426
nonce1 = str(nonce).zfill(32)
h_amt = SHA3_224.new()
h_amt.update(b'1')
amt = (int(h_amt.hexdigest(), 16))
print(amt)
m1 = 4933601832480809353473354884041175248572605852782963066896748056885475641656749621629491905191014868618662270686970232166446509470324736864650682101529030248099045013028061692922691724625514706329230172429768068340125863618218559912413117007754845075429408372888507551698514494498492001013849289727206925716097505112821640035328796287477288832274302228451772267834762720729040136679341742771582480873438819854901251010698577442809438919694733749250049741106149694027735988626092669792535204681665271762659664614542674529824442558625688825977054069126171946431554677605767056236181410658731273842816008767266250489001
T1 = str(amt) + str(m1) + str(nonce1)
print(T1)
h_T1 = SHA3_224.new()
h_T1.update(T1.encode('utf-16'))
print(h_T1.hexdigest())
while (int(h_T1.hexdigest(), 16) >=
0X000000FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF):
nonce += 1 # Increment nonce (ie change your guess)
nonce1 = str(nonce).zfill(31)
T1 = str(amt) + str(m1) + (nonce1)
print(T1)
h_T1 = SHA3_224.new()
from Crypto.Hash import SHA3_224
hasher = SHA3_224.new(
b"secret message"
) # $ CryptographicOperation CryptographicOperationInput=b"secret message" CryptographicOperationAlgorithm=SHA3224
print(hasher.hexdigest())
hasher = SHA3_224.new(
) # $ CryptographicOperation CryptographicOperationAlgorithm=SHA3224
hasher.update(
b"secret"
) # $ CryptographicOperation CryptographicOperationInput=b"secret" CryptographicOperationAlgorithm=SHA3224
hasher.update(
b" message"
) # $ CryptographicOperation CryptographicOperationInput=b" message" CryptographicOperationAlgorithm=SHA3224
print(hasher.hexdigest())