vb.net - "Invalid algorithm specified"在 OFB 密码模式下使用 AES (VB.NET)

Question

我必须使用 OFB 密码模式的 AES 加密，我使用 VB.NET 4.5、windows 8 和以下代码:

   Public Function DoEncryption(ByVal KeyArray() As Byte, ByVal IVArray() As Byte, ByVal Buffer As String) As Byte()
    Dim encrypted() As Byte
    Using a As Aes = Aes.Create()
        a.Mode = CipherMode.OFB

        Dim encryptor As ICryptoTransform
        encryptor = a.CreateEncryptor(KeyArray, IVArray)


        ' Create the streams used for encryption. 
        Using msEncrypt As New MemoryStream()
            Using csEncrypt As New CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write)
                Using swEncrypt As New StreamWriter(csEncrypt)

                    'Write all data to the stream.
                    swEncrypt.Write(Buffer)
                End Using
                encrypted = msEncrypt.ToArray()
            End Using
        End Using
    End Using

    Return encrypted

End Function

我在

处遇到错误“指定的算法无效”

  swEncrypt.Write(Buffer)

有什么建议吗？

Answer 1

是的，它可以使用 @Plutonix 提到的 BouncyCaSTLe使用 Nuget 安装 BouncyCaSTLe 后我的新代码是:

Imports System.Security.Cryptography
Imports System.IO
Imports Org.BouncyCastle.Crypto
Imports Org.BouncyCastle.Security
Imports Org.BouncyCastle.Crypto.Parameters
Public Class EncryptionFunction
Public Function DoEncryption(ByVal KeyArray() As Byte, ByVal IVArray() As Byte, ByVal Buffer As Byte()) As Byte()

        Dim ae As New CipherKeyGenerator()
        ae.Init(New KeyGenerationParameters(New SecureRandom(), 256))
        Dim aesKeyParam As KeyParameter = ParameterUtilities.CreateKeyParameter("AES", KeyArray)
        Dim aesIVKeyParam As ParametersWithIV = New ParametersWithIV(aesKeyParam, IVArray)
        Dim cipher As IBufferedCipher = CipherUtilities.GetCipher("AES/OFB/NoPadding")
        cipher.Init(True, aesIVKeyParam)
        Dim encrypted() As Byte = cipher.DoFinal(Buffer)


        Return encrypted

    End Function
End Class

谢谢你:)