我的目标是用Python编写一个执行以下操作的代码:1.生成公钥。2. 对公钥进行哈希处理。3. 生成一个随机字符串。4. 使用散列公钥加密和解密随机字符串。
这是我编写的代码:
from Crypto.PublicKey import RSA
import random
import string
import hashlib
import base64
from cryptography.fernet import Fernet
from cryptography.hazmat.backends import default_backend
from cryptography.hazmat.primitives import hashes
from cryptography.hazmat.primitives.kdf.pbkdf2 import PBKDF2HMAC
def encrypt(plaintext, password):
f = Fernet(base64.urlsafe_b64encode(
PBKDF2HMAC(algorithm=hashes.SHA256(), length=32, salt=b'abcd', iterations=1000,
backend=default_backend()).derive(password.encode())))
return f.encrypt(plaintext.encode()).decode()
def decrypt(ciphertext, password):
f = Fernet(base64.urlsafe_b64encode(
PBKDF2HMAC(algorithm=hashes.SHA256(), length=32, salt=b'abcd', iterations=1000,
backend=default_backend()).derive(password.encode())))
return f.decrypt(ciphertext.encode()).decode()
def randomString(strlength = 16): #Random code
letters = string.ascii_letters
return ''.join(random.choice(letters) for i in range(strlength))
key = RSA.generate(2048) # Private key creation
code = 'nooneknows'
privatekey = key.exportKey(passphrase=code, pkcs=8)
publickey = key.publickey().exportKey()
result = hashlib.md5(publickey) #Hashing the Publickey
publickey = result.digest()
Nonce=randomString() # Creating Nonce
encrypt((str(Nonce)), password=(str(publickey))) # Encrypting nonce with hashed pub.key
decrypt((str(encrypt)), password=(str(publickey)))
print("This is the decrption", encrypt)
print("This is the decrption", decrypt)
当我运行它时,我收到错误:
D:Anaconda3python.exe C:/Users/AVIV/.PyCharmCE2019.1/config/scratches/test.py
Traceback (most recent call last):
File "D:Anaconda3libsite-packagescryptographyfernet.py", line 87, in _get_unverified_token_data
data = base64.urlsafe_b64decode(token)
File "D:Anaconda3libbase64.py", line 133, in urlsafe_b64decode
return b64decode(s)
File "D:Anaconda3libbase64.py", line 87, in b64decode
return binascii.a2b_base64(s)
binascii.Error: Incorrect padding
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "C:/Users/AVIV/.PyCharmCE2019.1/config/scratches/test.py", line 39, in <module>
decrypt((str(encrypt)), password=(str(publickey)))
File "C:/Users/AVIV/.PyCharmCE2019.1/config/scratches/test.py", line 21, in decrypt
return f.decrypt(ciphertext.encode()).decode()
File "D:Anaconda3libsite-packagescryptographyfernet.py", line 74, in decrypt
timestamp, data = Fernet._get_unverified_token_data(token)
File "D:Anaconda3libsite-packagescryptographyfernet.py", line 89, in _get_unverified_token_data
raise InvalidToken
cryptography.fernet.InvalidToken
有没有办法解决这个错误?我的猜测是,问题出在解码和编码到/从字节编码。我尝试多次解码/编码它,但总是以错误告终。另外,我想它的填充有问题,但我不知道如何解决它。我在想,也许Fernet加密不适合我的项目目标,也许我应该使用其他加密/库?
您实际上并没有将 encrypt 分配给变量,而是将加密函数作为解密函数的参数发送。在代码末尾进行此更改:
encrypted = encrypt((str(Nonce)), password=(str(publickey))) # Encrypting nonce with hashed pub.key
decrypted = decrypt((str(encrypted)), password=(str(publickey)))
print("This is the encrypted", encrypted)
print("This is the decrypted", decrypted)
decrypted
的输出将是您加密的随机数。