等价于Java中的CryptoStream .NET？

Question

我在Visual Basic中有一个加密的字符串。 NET 2008年，加密和解密功能如下：

Imports System.Security.Cryptography 

Public Shared Function Encriptar(ByVal strValor As String) As String 
    Dim strEncrKey As String = "key12345" 
    Dim byKey() As Byte = {} 
    Dim IV() As Byte = {&H12, &H34, &H56, &H78, &H90, &HAB, &HCD, &HEF} 
    Try 
     byKey = System.Text.Encoding.UTF8.GetBytes(strEncrKey) 
     Dim des As New DESCryptoServiceProvider 
     Dim inputByteArray() As Byte = Encoding.UTF8.GetBytes(strValor) 
     Dim ms As New MemoryStream 
     Dim cs As New CryptoStream(ms, des.CreateEncryptor(byKey, IV), CryptoStreamMode.Write) 
     cs.Write(inputByteArray, 0, inputByteArray.Length) 
     cs.FlushFinalBlock() 
     Return Convert.ToBase64String(ms.ToArray()) 
    Catch ex As Exception 
     Return "" 
    End Try 
End Function 

Public Shared Function Desencriptar(ByVal strValor As String) As String 
    Dim sDecrKey As String = "key12345" 
    Dim byKey() As Byte = {} 
    Dim IV() As Byte = {&H12, &H34, &H56, &H78, &H90, &HAB, &HCD, &HEF} 
    Dim inputByteArray(strValor.Length) As Byte 
    Try 
     byKey = System.Text.Encoding.UTF8.GetBytes(sDecrKey) 
     Dim des As New DESCryptoServiceProvider 
     If Trim(strValor).Length = 0 Then 
      Throw New Exception("Password No debe estar en Blanco") 
     End If 
     inputByteArray = Convert.FromBase64String(strValor) 
     Dim ms As New MemoryStream 
     Dim cs As New CryptoStream(ms, des.CreateDecryptor(byKey, IV), CryptoStreamMode.Write) 
     cs.Write(inputByteArray, 0, inputByteArray.Length) 
     cs.FlushFinalBlock() 
     Dim encoding As System.Text.Encoding = System.Text.Encoding.UTF8 
     Return encoding.GetString(ms.ToArray(), 0, ms.ToArray.Count) 
    Catch ex As Exception 
     Return "" 
    End Try 
End Function 

例如单词“机器人”这个函数加密给我结果“B3xogi/Qfsc =”

现在我需要解密字符串“B3xogi/Qfsc =”它来自java，由相同的键，这是“key12345”，结果应该是“android”...任何人都知道如何做到这一点？

在此先感谢。

Answer 1

使用Apache共享编解码器十六进制和base64编码/解码，可以使用下面的代码：

KeySpec ks = new DESKeySpec("key12345".getBytes("UTF-8")); 
SecretKey key = SecretKeyFactory.getInstance("DES").generateSecret(ks); 

IvParameterSpec iv = new IvParameterSpec(
     Hex.decodeHex("1234567890ABCDEF".toCharArray())); 

Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding"); 
cipher.init(Cipher.DECRYPT_MODE, key, iv); 

byte[] decoded = cipher.doFinal(Base64.decodeBase64("B3xogi/Qfsc=")); 

System.out.println("Decoded: " + new String(decoded, "UTF-8")); 

Answer 2

您正在使用DES加密。

这里是一个关于如何encrypt and decrypt with DES的例子。

重点是创建一个SecretKey，Cipher使用它，并解密您的字符串与它。

Mmmh ...

我发现another article可能最适合您的问题，因为它使用IVBytes :)

Answer 3

最接近的Java类到.NET的CryptoStream类是CipherInputStream和CipherOutputStream类。

Answer 4

public String encryptText(String cipherText) throws Exception { 

    String plainKey = "key12345"; 
    String plainIV = "1234567890ABCDEF"; 

    KeySpec ks = new DESKeySpec(plainKey.getBytes(encodingType)); 
    SecretKey key = SecretKeyFactory.getInstance(keyDes).generateSecret(ks); 

    IvParameterSpec iv = new IvParameterSpec(
      org.apache.commons.codec.binary.Hex.decodeHex(plainIV.toCharArray())); 

    Cipher cipher = Cipher.getInstance(encryptAlgo); 
    cipher.init(Cipher.ENCRYPT_MODE, key, iv); 

    byte[] decoded = cipher.doFinal(cipherText.getBytes(encodingType)); 

    return new Base64().encodeToString(decoded); 
}