Клиент для шифрования RSA, пояснения здесь - https://github.com/1egac1/rsa_endecrypting, код грязный и кривойimport os
from getpass import getpass
from cryptography.hazmat.backends import default_backend
from cryptography.hazmat.primitives.asymmetric import rsa
from cryptography.hazmat.primitives import serialization
from cryptography.hazmat.primitives.asymmetric import padding
from cryptography.hazmat.primitives import hashes
from cryptography.hazmat.primitives.serialization import load_pem_private_key
from cryptography.hazmat.primitives.serialization import load_pem_public_key
def acc_managment (passw):
while True:
ch = input("[1] Decrypt message \n[2] Encrypt message\n[3 or other]Exit\nWhat do you want to do?[num] ")
if ch == "2":
message = input("PUT YOUR MESSAGE >> ")
pub_keys_list = os.listdir("pub_keys")
for i in range(1, len(pub_keys_list)+1):
print(str(i)+". "+pub_keys_list[i-1])
path_encr_key = input("Num of the key >> ")
PubKey = load_pem_public_key(open('pub_keys/'+pub_keys_list[int(path_encr_key)-1], 'rb').read(),default_backend())
encrtext = PubKey.encrypt(
bytes(message, encoding='utf-8'),
padding.OAEP(
mgf=padding.MGF1(algorithm=hashes.SHA256()),
algorithm=hashes.SHA256(),
label=None
)
)
filename = input("Choose filename >> ")
f = open("mess-s/" + filename, "wb")
f.write(encrtext)
f.close
elif ch == "1":
PrivKey = load_pem_private_key(open("priv_key/priv_key.pem", 'rb').read(),bytes(passw, encoding='utf-8'),default_backend())
dir_list = os.listdir("mess-s")
for i in range(1, len(dir_list)+1):
print(str(i)+'. '+dir_list[i-1])
choose = int(input("What mess you want to decrypt? "))
opend = open('mess-s/'+dir_list[choose-1], 'rb')
ciphertext = opend.read()
d = PrivKey.decrypt(
ciphertext,
padding.OAEP(
mgf=padding.MGF1(algorithm=hashes.SHA256()),
algorithm=hashes.SHA256(),
label=None
)
)
print("Message".center(60,"="))
print(str(d)[2:len(str(d))-1])
print("="*60)
else:
exit()
def register():
os.mkdir("pub_key")
os.mkdir("pub_keys")
os.mkdir("priv_key")
os.mkdir("mess-s")
password = getpass("Create Password >> ")
private_key = rsa.generate_private_key(
public_exponent=65537,
key_size=2048,
backend=default_backend()
)
public_key = private_key.public_key()
with open("priv_key/priv_key.pem", "wb") as f:
f.write(
private_key.private_bytes(
encoding=serialization.Encoding.PEM,
format=serialization.PrivateFormat.TraditionalOpenSSL,
encryption_algorithm=serialization.BestAvailableEncryption(bytes(password, encoding='utf-8')),
)
)
f.close()
with open("pub_key/pub_key.pem", "wb") as f:
f.write(
public_key.public_bytes(
encoding=serialization.Encoding.PEM,
format=serialization.PublicFormat.SubjectPublicKeyInfo,
)
)
f.close()
acc_managment(password)
def log_in():
password = getpass("Password >> ")
acc_managment(password)
if __name__ == "__main__":
ex = os.listdir('.')
ex_bool = False
for el in ex:
if el == "pub_key":
ex_bool = True
break
if ex_bool:
log_in()
else:
register()
