Question

以下是vb.net的代码段。我想将它转换为python。我使用了hashlib，hmac和pyDes，但是没有一个产生与vb程序相同的结果。有什么建议。？这是我第一次处理加密。请帮我解决这个问题.. 代码：

Imports Microsoft.VisualBasic.CompilerServices
Imports System
Imports System.Diagnostics
Imports System.Security.Cryptography
Imports System.Text

Namespace _Cargo
    Public Class Crypto
        Private Shared DES As TripleDESCryptoServiceProvider = New TripleDESCryptoServiceProvider()

        Private Shared MD5 As MD5CryptoServiceProvider = New MD5CryptoServiceProvider()

        <DebuggerNonUserCode()>
        Public Sub New()
        End Sub

        Public Shared Function MD5Hash(value As String) As Byte()
            Return Crypto.MD5.ComputeHash(Encoding.ASCII.GetBytes(value))
        End Function

        Public Shared Function Encrypt(stringToEncrypt As String) As String
            Crypto.DES.Key = Crypto.MD5Hash("L6#F&,q2$xLx")
            Crypto.DES.Mode = CipherMode.ECB
            Dim bytes As Byte() = Encoding.ASCII.GetBytes(stringToEncrypt)
            Return Convert.ToBase64String(Crypto.DES.CreateEncryptor().TransformFinalBlock(bytes, 0, bytes.Length))
        End Function

        Public Shared Function Decrypt(encryptedString As String) As String
            Dim result As String
            Try
                Crypto.DES.Key = Crypto.MD5Hash("L6#F&,q2$xLx")
                Crypto.DES.Mode = CipherMode.ECB
                Dim array As Byte() = Convert.FromBase64String(encryptedString)
                result = Encoding.ASCII.GetString(Crypto.DES.CreateDecryptor().TransformFinalBlock(array, 0, array.Length))
                Return result
            Catch expr_4D As Exception
                ProjectData.SetProjectError(expr_4D)
                ProjectData.ClearProjectError()
            End Try
            result = Nothing
            Return result
        End Function
    End Class
End Namespace

Answer 1

查看以下代码段

DES的签名

pyDes.des(key, [mode], [IV], [pad], [padmode])

from pyDes import *

data = "Please encrypt my data"
k = des("DESCRYPT", ECB, "\0\0\0\0\0\0\0\0", pad=None, padmode=PAD_PKCS5)
d = k.encrypt(data)
print "Encrypted: %r" % d
print "Decrypted: %r" % k.decrypt(d)

<强>更新

我已将vb.net代码转换为python并且工作正常

from pyDes import *
import hashlib
import base64
key = hashlib.md5("L6#F&,q2$xLx").digest()
data = "I love security"
k = triple_des(key, ECB, "\0\0\0\0\0\0\0\0", pad=None, padmode=PAD_PKCS5)
d = k.encrypt(data)
base64Encrypted= base64.b64encode(d)
print "Encrypted: %r" % d
base64Decrypted= base64.b64decode(base64Encrypted)
print "Decrypted: %r" % k.decrypt(base64Decrypted)

Answer 2

您可以使用Crypto库，非常方便所有与加密相关的内容

from Crypto.Cipher import DES
from Crypto.Hash import MD5
from Crypto import Random

def encrypt(string, key):
    hash = MD5.new(key).digest()
    iv = Random.new().read(DES.block_size)
    cipher = DES.new(hash, DES.MODE_ECB, iv)
    return iv + cipher.encrypt(string)

使用python加密数据

2 个答案: