def __init__(self, type="client"):
if type == "client":
rng = Random().read
key = RSA.generate(2048, rng)
self.__publicKey = key.publickey().exportKey('PEM')
self.__privateKey = key.exportKey('PEM')
def generate_keys():
# generate keys
modlen = 2560
pvKey = RSA.generate(modlen, Random().read)
pbKey = pvKey.publickey()
# export keys as unicode strings
pbKey = pbKey.exportKey("PEM")
pvKey = pvKey.exportKey("PEM")
pbKey = pbKey.decode('utf-8')
pvKey = pvKey.decode('utf-8')
return pvKey, pbKey
def encrypt(self, data):
plain_text = self.pad(data)
iv = Random().read(AES.block_size)
cipher = AES.new(self.key, AES.MODE_OFB, iv)
return b64encode(iv + cipher.encrypt(plain_text.encode())).decode()
from flask import Flask, render_template, request
from Crypto.PublicKey import RSA
from Crypto.Cipher import PKCS1_v1_5
from Crypto.Random import new as Random
from base64 import b64encode, b64decode
app = Flask(__name__)
#Set up the RSA keys
randon_generator = Random().read
set_of_keys = RSA.generate(1024, randon_generator)
public_key = set_of_keys.publickey()
# Defining Routes
@app.route('/')
def index():
return render_template('index.html')
@app.route('/submit', methods=['POST'])
def submit():
if request.method == 'POST':
message = request.form['message']
isEncry = request.form['isEncry']
# Validating input
if message == '':
return render_template('index.html', message='Please enter required fields')
elif len(message) > 200 and isEncry == 'true':
return render_template('index.html', message='Please insert an string with less than 200 characters')
# Encrypting Message
if isEncry == 'true':
def generate_key(self, key_length):
assert key_length in [1024, 2048, 4096]
rng = Random().read
self.key = RSA.generate(key_length, rng)
def generate_key(self, key_length):
rng = Random().read
self.key = RSA.generate(key_length, rng)
def encrypt(self):
plain_text = self.readfile()
iv = Random().read(AES.block_size)
cipher = AES.new(self.key, AES.MODE_OFB, iv)
a = base64.b64encode(iv + cipher.encrypt(bytes(plain_text, 'utf8'))).decode()
self.writefile(a)