rsa in python code example
Example 1: python rsa
import Crypto
from Crypto.PublicKey import RSA
from Crypto import Random
random_generator = Random.new().read
key = RSA.generate(1024, random_generator)
publickey = key.publickey
encrypted = publickey.encrypt('encrypt this message', 32)
print 'encrypted message:', encrypted
f = open ('encryption.txt', 'w'w)
f.write(str(encrypted))
f.close()
f = open ('encryption.txt', 'r')
message = f.read()
decrypted = key.decrypt(message)
print 'decrypted', decrypted
f = open ('encryption.txt', 'w')
f.write(str(message))
f.write(str(decrypted))
f.close()
Example 2: python rsa
from Crypto.PublicKey import RSA
from Crypto.Cipher import PKCS1_OAEP
import binascii
keyPair = RSA.generate(3072)
pubKey = keyPair.publickey()
print(f"Public key: (n={hex(pubKey.n)}, e={hex(pubKey.e)})")
pubKeyPEM = pubKey.exportKey()
print(pubKeyPEM.decode('ascii'))
print(f"Private key: (n={hex(pubKey.n)}, d={hex(keyPair.d)})")
privKeyPEM = keyPair.exportKey()
print(privKeyPEM.decode('ascii'))
msg = bytes(str(input("Enter plain text: ")), 'utf-8')
encryptor = PKCS1_OAEP.new(pubKey)
encrypted = encryptor.encrypt(msg)
print("Encrypted:", binascii.hexlify(encrypted))
decryptor = PKCS1_OAEP.new(keyPair)
decrypted = decryptor.decrypt(encrypted)
print('Decrypted:', decrypted.decode('utf-8'))