mirror of
https://github.com/metafy-social/python-scripts.git
synced 2024-11-27 22:11:10 +00:00
74 lines
1.9 KiB
Python
74 lines
1.9 KiB
Python
import rsa
|
|
|
|
##this function generates the keys
|
|
def generate_keys():
|
|
(pubKey, privKey) = rsa.newkeys(1024)
|
|
with open('keys/pubkey.pem', 'wb') as f:
|
|
f.write(pubKey.save_pkcs1('PEM'))
|
|
|
|
with open('keys/privkey.pem', 'wb') as f:
|
|
f.write(privKey.save_pkcs1('PEM'))
|
|
|
|
##Loads the keys from the .pem files to pubkey and privkey variables
|
|
def load_keys():
|
|
with open('keys/pubkey.pem', 'rb') as f:
|
|
pubKey = rsa.PublicKey.load_pkcs1(f.read())
|
|
|
|
with open('keys/privkey.pem', 'rb') as f:
|
|
privKey = rsa.PrivateKey.load_pkcs1(f.read())
|
|
|
|
return pubKey, privKey
|
|
|
|
##encrypts the messages using the public key
|
|
def encrypt(msg, key):
|
|
return rsa.encrypt(msg.encode('ascii'), key)
|
|
|
|
##decrypts the encrypted message or ciphertext using the privatekey
|
|
def decrypt(ciphertext, key):
|
|
try:
|
|
return rsa.decrypt(ciphertext, key).decode('ascii')
|
|
except:
|
|
return False
|
|
|
|
##the sha is generated for the message and key
|
|
def sign_sha1(msg, key):
|
|
return rsa.sign(msg.encode('ascii'), key, 'SHA-1')
|
|
|
|
##this function verifies the sha
|
|
def verify_sha1(msg, signature, key):
|
|
try:
|
|
return rsa.verify(msg.encode('ascii'), signature, key) == 'SHA-1'
|
|
except:
|
|
return False
|
|
|
|
##generates keys
|
|
generate_keys()
|
|
|
|
##loads keys
|
|
pubKey, privKey = load_keys()
|
|
|
|
##Takes in the message and encrypts it
|
|
message = input('Enter a message:')
|
|
ciphertext = encrypt(message, pubKey)
|
|
|
|
signature = sign_sha1(message, privKey)
|
|
|
|
##It then decrypts the message.
|
|
plaintext = decrypt(ciphertext, privKey)
|
|
|
|
##the sgnature of the message is displayed
|
|
print(f'Signature: {signature}')
|
|
##the cipher of the message is displayed
|
|
print(f'Cipher text: {ciphertext}')
|
|
|
|
##the decrypted message is displayed
|
|
if plaintext:
|
|
print(f'Plain text: {plaintext}')
|
|
else:
|
|
print('Could not decrypt the message.')
|
|
|
|
if verify_sha1(plaintext, signature, pubKey):
|
|
print('great the signature is verified')
|
|
else:
|
|
print('Could not verify the message signature.')
|