为什么 System.ArgumentException 出现在密码代码行的第二次或第三次迭代中？
Why is a System.ArgumentException occurring on the second or third iteration of a cryptographic line of code?
执行处理密码学的代码后出现以下错误：
An unhandled exception of type 'System.ArgumentException' occurred in mscorlib.dll
Additional information: Object of type 'System.Int64' cannot be converted to type 'System.UInt32'.
一些发生类似错误的来源（例如 http://truncatedcodr.wordpress.com/2012/06/20/fix-sitecore-and-net-framework-4-5/ ）说要将 Web.config 中的值更改为以下值（请原谅 "less than" 之后的 space符号):
< setting name=”Login.RememberLastLoggedInUserName” value=”false” />
我以前从未使用过 Web.config 文件，所以这可能是解决方案。但是，我的项目没有一个（我不确定它是否可以有一个，因为我认为它没有网站名称）而且我不知道为什么在上一次迭代中取得了明显的成功（s ).无论如何，这是我的代码中包含问题的部分（我删除了一些不相关的代码）：
暗流为 IO.FileStream
将 dataOffset 调暗为 Int64
将数据大小调暗为 Int64
Dim del2 作为新的 ChangeProgress2Delegate(AddressOf ChangeProgress2)</p>
<pre><code>Private Sub Form1_Load(sender As Object, e As EventArgs) Handles Me.Load
Dim fileDialog As New OpenFileDialog()
fileDialog.ShowDialog()
stream = New IO.FileStream(fileDialog.FileName, IO.FileMode.Open, IO.FileAccess.ReadWrite)
Dim t As New Threading.Tasks.Task(AddressOf Perform)
t.Start()
End Sub
Public Sub Perform()
Dim Key(15) As [Byte]
Dim Bytes(15) As [Byte]
Dim IV(15) As [Byte]
Dim userData(31743) As [Byte]
Dim encryption2 As Security.Cryptography.Aes
Dim decryptor2 As Security.Cryptography.ICryptoTransform
Dim msDecrypt2 As IO.MemoryStream
Dim csDecrypt2 As Security.Cryptography.CryptoStream
For i As UInt32 = 0 To 3
.
.
.
For j As UInt32 = 0 To (numPartitions - 1)
.
.
.
dataOffset = Convert.ToUInt32((Convert.ToUInt64(stream.ReadByte()) << 24) + (Convert.ToUInt64(stream.ReadByte()) << 16) + (Convert.ToUInt64(stream.ReadByte()) << 8) + Convert.ToUInt64(stream.ReadByte())) >> 2
dataSize = Convert.ToUInt32((Convert.ToUInt64(stream.ReadByte()) << 24) + (Convert.ToUInt64(stream.ReadByte()) << 16) + (Convert.ToUInt64(stream.ReadByte()) << 8) + Convert.ToUInt64(stream.ReadByte())) >> 2
stream.Position = dataOffset
For k = 0 To ((dataSize / 32768) - 1)
stream.Position += 976
stream.Read(IV, 0, 16)
stream.Position += 32
stream.Read(userData, 0, 31744)
encryption2 = Security.Cryptography.Aes.Create()
encryption2.Key = Key
encryption2.IV = IV
encryption2.Padding = Security.Cryptography.PaddingMode.None
decryptor2 = encryption2.CreateDecryptor(encryption2.Key, encryption2.IV)
msDecrypt2 = New IO.MemoryStream(userData)
csDecrypt2 = New Security.Cryptography.CryptoStream(msDecrypt2, decryptor2, Security.Cryptography.CryptoStreamMode.Read)
csDecrypt2.Read(userData, 0, 31744)
stream.Position -= 31744
stream.Write(userData, 0, 31744)
Debugger.Break()
Me.BeginInvoke(del2, {i + 1, j + 1, numPartitions})
Next
Next
Next
End Sub
Public Sub ChangeProgress2(ByVal partitionOrder As UInt32, ByVal partitionNum As UInt32, ByVal numPartitions As UInt32)
Progress.Value = ((stream.Position - dataOffset) / dataSize) * 100
End Sub
Public Delegate Sub ChangeProgress2Delegate(ByVal partitionOrder As UInt32, ByVal partitionNum As UInt32, ByVal numPartitions As UInt32)
在上面的代码中，错误在第二次或第三次迭代的这三行代码之间随机触发：
decryptor2 = encryption2.CreateDecryptor(encryption2.Key, encryption2.IV)
msDecrypt2 = New IO.MemoryStream(userData)
csDecrypt2 = New Security.Cryptography.CryptoStream(msDecrypt2, decryptor2, Security.Cryptography.CryptoStreamMode.Read)
我发现了错误。它与任何密码学无关，即使异常是围绕这些代码行触发的。在 BeginInvoke 行，我需要将参数转换为 UInt32 以便代码看起来像：
Me.BeginInvoke(del2, {Convert.ToUInt32(i + 1), Convert.ToUInt32(j + 1), Convert.ToUInt32(numPartitions)})
我不得不这样做，即使 i 是 UInt32，j 是 UInt32，numPartitions 是 UInt32.
执行处理密码学的代码后出现以下错误：
An unhandled exception of type 'System.ArgumentException' occurred in mscorlib.dll Additional information: Object of type 'System.Int64' cannot be converted to type 'System.UInt32'.
一些发生类似错误的来源（例如 http://truncatedcodr.wordpress.com/2012/06/20/fix-sitecore-and-net-framework-4-5/ ）说要将 Web.config 中的值更改为以下值（请原谅 "less than" 之后的 space符号):
< setting name=”Login.RememberLastLoggedInUserName” value=”false” />
我以前从未使用过 Web.config 文件，所以这可能是解决方案。但是，我的项目没有一个（我不确定它是否可以有一个，因为我认为它没有网站名称）而且我不知道为什么在上一次迭代中取得了明显的成功（s ).无论如何，这是我的代码中包含问题的部分（我删除了一些不相关的代码）：
暗流为 IO.FileStream
将 dataOffset 调暗为 Int64
将数据大小调暗为 Int64
Dim del2 作为新的 ChangeProgress2Delegate(AddressOf ChangeProgress2)</p>
<pre><code>Private Sub Form1_Load(sender As Object, e As EventArgs) Handles Me.Load
Dim fileDialog As New OpenFileDialog()
fileDialog.ShowDialog()
stream = New IO.FileStream(fileDialog.FileName, IO.FileMode.Open, IO.FileAccess.ReadWrite)
Dim t As New Threading.Tasks.Task(AddressOf Perform)
t.Start()
End Sub
Public Sub Perform()
Dim Key(15) As [Byte]
Dim Bytes(15) As [Byte]
Dim IV(15) As [Byte]
Dim userData(31743) As [Byte]
Dim encryption2 As Security.Cryptography.Aes
Dim decryptor2 As Security.Cryptography.ICryptoTransform
Dim msDecrypt2 As IO.MemoryStream
Dim csDecrypt2 As Security.Cryptography.CryptoStream
For i As UInt32 = 0 To 3
.
.
.
For j As UInt32 = 0 To (numPartitions - 1)
.
.
.
dataOffset = Convert.ToUInt32((Convert.ToUInt64(stream.ReadByte()) << 24) + (Convert.ToUInt64(stream.ReadByte()) << 16) + (Convert.ToUInt64(stream.ReadByte()) << 8) + Convert.ToUInt64(stream.ReadByte())) >> 2
dataSize = Convert.ToUInt32((Convert.ToUInt64(stream.ReadByte()) << 24) + (Convert.ToUInt64(stream.ReadByte()) << 16) + (Convert.ToUInt64(stream.ReadByte()) << 8) + Convert.ToUInt64(stream.ReadByte())) >> 2
stream.Position = dataOffset
For k = 0 To ((dataSize / 32768) - 1)
stream.Position += 976
stream.Read(IV, 0, 16)
stream.Position += 32
stream.Read(userData, 0, 31744)
encryption2 = Security.Cryptography.Aes.Create()
encryption2.Key = Key
encryption2.IV = IV
encryption2.Padding = Security.Cryptography.PaddingMode.None
decryptor2 = encryption2.CreateDecryptor(encryption2.Key, encryption2.IV)
msDecrypt2 = New IO.MemoryStream(userData)
csDecrypt2 = New Security.Cryptography.CryptoStream(msDecrypt2, decryptor2, Security.Cryptography.CryptoStreamMode.Read)
csDecrypt2.Read(userData, 0, 31744)
stream.Position -= 31744
stream.Write(userData, 0, 31744)
Debugger.Break()
Me.BeginInvoke(del2, {i + 1, j + 1, numPartitions})
Next
Next
Next
End Sub
Public Sub ChangeProgress2(ByVal partitionOrder As UInt32, ByVal partitionNum As UInt32, ByVal numPartitions As UInt32)
Progress.Value = ((stream.Position - dataOffset) / dataSize) * 100
End Sub
Public Delegate Sub ChangeProgress2Delegate(ByVal partitionOrder As UInt32, ByVal partitionNum As UInt32, ByVal numPartitions As UInt32)
在上面的代码中，错误在第二次或第三次迭代的这三行代码之间随机触发：
decryptor2 = encryption2.CreateDecryptor(encryption2.Key, encryption2.IV)
msDecrypt2 = New IO.MemoryStream(userData)
csDecrypt2 = New Security.Cryptography.CryptoStream(msDecrypt2, decryptor2, Security.Cryptography.CryptoStreamMode.Read)
我发现了错误。它与任何密码学无关，即使异常是围绕这些代码行触发的。在 BeginInvoke 行，我需要将参数转换为 UInt32 以便代码看起来像：
Me.BeginInvoke(del2, {Convert.ToUInt32(i + 1), Convert.ToUInt32(j + 1), Convert.ToUInt32(numPartitions)})
我不得不这样做，即使 i 是 UInt32，j 是 UInt32，numPartitions 是 UInt32.