python - 在JavaScript中使用RSA加密并在Python3中解密

Question

我正在开发一个网站，使用这个JS插件来加密一些数据并将其发送到服务器:https://github.com/travist/jsencrypt

我正在使用 Django 运行 Python 3，问题是我无法解密服务器上的数据。我的代码是:

JS 代码:

pkey = "-----BEGIN PUBLIC KEY-----\
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDeVs9mcWUtTgi93/KXMNA/IF7S\
oQcZAmKQueygoDp9XUM3xnxPb/6XNpJQII85Hxbljqs/xuPVtxo5ovyJ+XXIPV8+\
eG6kSDmr2C3NpBUtfoUeADC/1H1jy44T6stBgXGMwTPokhjvSyEbGpkgMGo74Rpq\
q1vHofh3KcPNoaYH4wIDAQAB\
-----END PUBLIC KEY-----";


var encrypter = new JSEncrypt;
encrypter.setPublicKey(pkey);
encrypter.encrypt('Testing...');

我得到:

"STg7Fnm6Y6cAgMXEt4SxP8rbMb/pFB2X9Y1z8pAOoCNO9y8XuhVmQuG/FRBSqM+3ge43x9kfYMideAUu69RothwEOYmNnVrfwqm7SLm3voEcSXCqst2S7prTmCvYW43WyAAUl0vNxV+7xsm/yciQ4XV+jZSKd3xidbWL1BTTUw8="

Python 代码:

from Crypto.PublicKey import RSA
from Crypto.Cipher import PKCS1_OAEP
from base64 import *


def decrypt(key, text):
    if type(key) == str:
        key = key.encode()
    if type(text) == str:
        text = text.encode()

    rsakey = RSA.importKey(key)
    rsakey = PKCS1_OAEP.new(rsakey)
    d = rsakey.decrypt(text)
    return d

text = "STg7Fnm6Y6cAgMXEt4SxP8rbMb/pFB2X9Y1z8pAOoCNO9y8XuhVmQuG/FRBSqM+3ge43x9kfYMideAUu69RothwEOYmNnVrfwqm7SLm3voEcSXCqst2S7prTmCvYW43WyAAUl0vNxV+7xsm/yciQ4XV+jZSKd3xidbWL1BTTUw8="

text = b64decode(text.encode())

with open('private.pem', 'rb') as f:
    key = f.read()
decrypt(key, text)

我得到:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python3.2/dist-packages/Crypto/Cipher/PKCS1_OAEP.py", line 227, in decrypt
    raise ValueError("Incorrect decryption.")
ValueError: Incorrect decryption.

我在此示例中使用的私钥是:

-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----

如果我尝试在 JS 上解密它，它会按预期工作:

private = "-----BEGIN RSA PRIVATE KEY-----\
MIICWwIBAAKBgQCO9YbJ8Z+tW0ucnMdXGNzmcvWaaLRGsx5iUHslbZ1tjec63HDm\
6Hr2hv56u5zytyF4Cd/0lBNRC9qf/1XlEFqeSRifsyHZpPfyZn0fbHWYLH8g5FE4\
VqrMe79ubSVx2eGWwwaLvEO+yaO1AF/fxWT6Ir8AUikMFFAnX+fBaA3XIwIDAQAB\
AoGADxuniQP+CgYR8ZUoA+5eugQALLdQBgC7/0veF9CDyKYsf634SI7dH9yYXEQj\
jAsKgHMatfBIMlJ8YlhLrY+S4+r26goNEqygtqetJ6NuePKQQ8xEERP4icsaBpY7\
WqeU6AZOMlyq8o+e4DMnuxGpf8UT+lLx1G9AmVJf3+6NONECQQDLX94BmW//48Y6\
yg9wnO6TR1msrGd1PFRqyJ9eilj8chI2JxiHkhepiTlBU7eyjUv4aeE7U84mp3Zo\
AtPoiKmlAkEAs/OQM9IDttfgdS/yK6vZr1myNAbKOdv1rVId7MAspGHbN//gzb4s\
r4mZKsIAi+jaDhpMvYbUxJe9y5HAY3XTJwJAe3hcZEQvRv+WHaMG9KuR/EBZJQgW\
V4qlBZ9/gfokRD9M5yudLNF5JCh3Zj3ZTMGT2eEOKOKcScNpk4QD+yzdMQJAQlSM\
Gd3WyqXmMav7qwdMVStN2YmLLyqZ80oqh6MKkYkUgh7KYWwxEn84ux8JjojFH5+o\
G9BASzrXldrivIaozwJAVAHr9ON/altcDyh/OjkJff/3xXzHB3Zxvy4WykkO/PdF\
tOqpAnYso3mCsEQsCcrJCflkFmJuYsvu4+Tm4GiqVg==\
-----END RSA PRIVATE KEY-----\
"
text = "STg7Fnm6Y6cAgMXEt4SxP8rbMb/pFB2X9Y1z8pAOoCNO9y8XuhVmQuG/FRBSqM+3ge43x9kfYMideAUu69RothwEOYmNnVrfwqm7SLm3voEcSXCqst2S7prTmCvYW43WyAAUl0vNxV+7xsm/yciQ4XV+jZSKd3xidbWL1BTTUw8="

encrypter.setPrivateKey(private);
encrypter.decrypt(text);

我得到:

"Testing"

但我就是无法让它在 Python 上运行。

我做错了什么？

Answer 1

jsencrypt 依赖于 jsbn 库，该库不提供 OAEP，仅提供 PKCS#1 v1.5 填充。

您必须在 python 中使用 PyCrypto 提供的相同内容。只需使用 PKCS1_v1_5 而不是 PKCS1_OAEP。

<小时/>

请注意，现在不应再使用 PKCS#1 v1.5 填充。我建议您使用forge library它提供了带有 OAEP 的 RSA 实现。