根据此处提供的示例,可以建立在JS(Crypto-JS)和Python之间共享秘密和派生键。这样就可以在两端获得相同的共享秘密和派生键。
但是,当我尝试以下加密时,我无法找到从Python正确解密的方法。我的理解是可能我可能搞错了填充或盐和哈希值。
const payload = "hello"
var iv = CryptoJS.enc.Utf8.parse("1020304050607080");
var test = CryptoJS.AES.encrypt(
payload,
derived_key,
{iv: iv, mode: CryptoJS.mode.CBC}
).toString();
console.log(test)
输出 "y+In4kriw0qy4lji6/x14g=="
Python(其中之一的尝试):
from Crypto.Cipher import AES
from Crypto.Util.Padding import pad,unpad
iv = "1020304050607080"
test_enc = "y+In4kriw0qy4lji6/x14g=="
enc = base64.b64decode(test_enc)
cipher = AES.new(derived_key, AES.MODE_CBC, iv.encode('utf-8'))
print(base64.b64decode(cipher.decrypt(enc)))
print(unpad(cipher.decrypt(enc),16))
我已经使用密码实现了加密,但在HKDF方面遇到了困难,非常感谢您的任何指导。
编辑:
以下是完整的Python代码:
from cryptography.hazmat.primitives.asymmetric import ec
from cryptography.hazmat.primitives.kdf.hkdf import HKDF
from cryptography.hazmat.primitives import hashes
from cryptography.hazmat.primitives import serialization
import base64
from Crypto.Cipher import AES
from Crypto.Util.Padding import pad,unpad
def deriveKey():
server_pkcs8 = b'''-----BEGIN PRIVATE KEY-----
MIG2AgEAMBAGByqGSM49AgEGBSuBBAAiBIGeMIGbAgEBBDBReGpDVmoVTzxNbJx6
aL4L9z1EdB91eonAmAw7mKDocLfCJITXZPUAmM46c6AipTmhZANiAAR3t96P0ZhU
jtW3rHkHpeGu4e+YT+ufMiMeanE/w8p+d9aCslvIbZyBBzeZ/266yqTUUoiYDzqv
Hb5q8rz7vEgr3DG4XfHYpCqfE2nttQGK3emHKGnvY239AteZkdwMpcs=
-----END PRIVATE KEY-----'''
client_x509 = b'''-----BEGIN PUBLIC KEY-----
MHYwEAYHKoZIzj0CAQYFK4EEACIDYgAEm0xeyy3nVnYpOpx/CV/FnlNEdWUZaqtB
AGf7flKxXEjmlSUjseYzCd566sLpNg56Gw6hcFx+rWTLGR4eDRWfmwlXhyUasuEg
mb0BQf8XJLBdvadb9eFx2CP1yjBsiy8e
-----END PUBLIC KEY-----'''
client_public_key = serialization.load_pem_public_key(client_x509)
server_private_key = serialization.load_pem_private_key(server_pkcs8, password=None)
shared_secret = server_private_key.exchange(ec.ECDH(), client_public_key)
print('Shared secret: ' + base64.b64encode(shared_secret).decode('utf8')) # Shared secret: xbU6oDHMTYj3O71liM5KEJof3/0P4HlHJ28k7qtdqU/36llCizIlOWXtj8v+IngF
salt_bytes = "12345678".encode('utf-8')
info_bytes = "abc".encode('utf-8')
derived_key = HKDF(
algorithm=hashes.SHA256(),
length=32,
salt=salt_bytes,
info=info_bytes,
).derive(shared_secret)
print('Derived key: ' + base64.b64encode(derived_key).decode('utf8'))
return derived_key
derived_key = deriveKey()
iv = "1020304050607080"
test_enc = "y+In4kriw0qy4lji6/x14g=="
enc = base64.b64decode(test_enc)
cipher = AES.new(derived_key, AES.MODE_CBC, iv.encode('utf-8'))
print(base64.b64decode(cipher.decrypt(enc)))
print(unpad(cipher.decrypt(enc),16))
print()
应该被删除,因为明文不是Base64编码的。除此之外,第二个print()
提供了使用我的测试密钥进行正确解密的结果。然而,由于您没有指定derived_key
,所以无法进行完全重现。也许您在CryptoJS代码中使用了错误的编码器。因此,您应该发布您的密钥以及如何解析此密钥。 - Topacoderived_key
分配值?这个部分缺失了!这可能是错误的根源,因为即使使用您的密钥,我也无法重现问题。 - Topaco