I installed Crypto module and SHA256 but showing ModuleNotFoundError :-
Traceback (most recent call last): File "Digitalsig.py", line 1, in from Crypto.Hash import SHA256 ModuleNotFoundError: No module named 'Crypto'
Here is the refrence code
from Crypto.Hash import SHA256
from Crypto.PublicKey import RSA
from Crypto import Random
random_generator = Random.new().read
#used to generate a keypair which contain a public and private key
keyPair = RSA.generate(1024,random_generator)
pubKey = keyPair.publicKey()
plainText = 'Hello World'
hashA = SHA256.new(plainText).digest()
digitalSignature = keyPair.sign(hashA,'')
print("Hash A: "+repr(hashA) + "\n");
print("Digital Signature: " + repr(digitalSignature) + "\n")
#Bob receives the plainText and digitalSignature from Alice
#plainTextChanged ='Hello World'
hashB =SHA256.new(plainText).digest()
print("Hash B: " + repr(hashB) + "\n")
if(pubKey.verify(hashB, digitalSignature)):
print("Match")
else:
print("No Match")
First install a module using pip
pip install pycrypto
(It require installation of Microsoft Visual C++ 14.0)