简短描述：
我需要在 PHP 中生成 RSA 密钥对，然后能够在 VB.NET 中使用它来加密/解密文件/字符串。
我的文件加密/解密VB.NET：http://jandrozd.eu/RSAFileEncryption.zip
适用于 .NET 生成的密钥，而不是 PHPSecLib 生成的密钥。
细节：
我正在为一家公司创建内部信息系统。本 IS 基于 VB.NET 桌面客户端和 PHP 服务器。由于客户的安全要求，我们在存储文件或字符串时被迫使用 RSA 加密。它还需要在传输时/之前进行加密。
我正在寻找生成 RSA 密钥对的 PHP 代码。我找到了 phpseclib，它生成得很好。我在服务器上使用它：
$rsa = new Crypt_RSA();
$rsa->setEncryptionMode(CRYPT_RSA_PUBLIC_FORMAT_PKCS1);
$rsa->setPrivateKeyFormat(CRYPT_RSA_PRIVATE_FORMAT_XML);
$rsa->setPublicKeyFormat(CRYPT_RSA_PUBLIC_FORMAT_XML);
//define('CRYPT_RSA_EXPONENT', 65537);
//define('CRYPT_RSA_SMALLEST_PRIME', 64); // makes it so multi-prime RSA is used
extract($rsa->createKey(512)); // == $rsa->createKey(1024) where 1024 is the key size
我还存储带有生成密钥的文本文件。当我尝试使用 VB.NET 中的这些密钥进行加密和解密时，问题就来了。使用 phpseclib 生成的密钥进行加密似乎在 VB.NET 中运行良好，但我无法在 VB.NET 中解密文件，带有“Bad data error”的字符串基本文件解密 vb 代码
Public Sub EncryptFile(ByVal strFilePath As String, ByVal strNewPath As String, ByVal strPublicKey As String)
Try
If File.Exists(strFilePath) Then
Dim bts() As Byte = My.Computer.FileSystem.ReadAllBytes(strFilePath)
Dim EncryptedMessage As RSAResult = RSA.Encrypt(bts, strPublicKey)
My.Computer.FileSystem.WriteAllBytes(strNewPath, EncryptedMessage.AsBytes, False)
If EnableMessageBoxes Then MsgBox("Encryption complete", MsgBoxStyle.Information)
Else
If EnableMessageBoxes Then MsgBox("File to encrypt does not exists", MsgBoxStyle.Exclamation)
End If
Catch ex As Exception
If EnableMessageBoxes Then MsgBox("Encryption error: " & ex.Message, MsgBoxStyle.Critical)
End Try
End Sub
Public Sub DecryptFile(ByVal strFilePath As String, ByVal strNewPath As String, ByVal strPrivateKey As String)
Try
If File.Exists(strFilePath) Then
Dim bts() As Byte = My.Computer.FileSystem.ReadAllBytes(strFilePath)
Dim DecryptedMessage As RSAResult = RSA.Decrypt(bts, strPrivateKey)
My.Computer.FileSystem.WriteAllBytes(strNewPath, DecryptedMessage.AsBytes, False)
If EnableMessageBoxes Then MsgBox("Decryption complete", MsgBoxStyle.Information)
Else
If EnableMessageBoxes Then MsgBox("File to encrypt does not exists", MsgBoxStyle.Exclamation)
End If
Catch ex As Exception
If EnableMessageBoxes Then MsgBox("Decryption error: " & ex.Message, MsgBoxStyle.Critical)
End Try
End Sub
VB.NET RSA 类
Imports System.Security.Cryptography
Imports System.Text
Public Class RSA
Public Shared Function Encrypt(ByVal Data As String, ByVal Publickey As String) As RSAResult
Try
Dim ByteConverter As New UnicodeEncoding()
Return Encrypt(ByteConverter.GetBytes(Data), Publickey)
Catch ex As Exception
Throw New Exception("Encrypt(String): " & ex.Message, ex)
End Try
End Function
Public Shared Function Encrypt(ByVal Data() As Byte, ByVal Publickey As String) As RSAResult
Try
Dim RSA As System.Security.Cryptography.RSACryptoServiceProvider = New System.Security.Cryptography.RSACryptoServiceProvider()
RSA.FromXmlString(Publickey)
Return New RSAResult(RSAEncrypt(Data, RSA.ExportParameters(False), False))
Catch ex As Exception
Throw New Exception("Encrypt(Bytes): " & ex.Message, ex)
End Try
End Function
Public Shared Function Decrypt(ByVal Data() As Byte, ByVal Privatekey As String) As RSAResult
Try
Dim RSA As System.Security.Cryptography.RSACryptoServiceProvider = New System.Security.Cryptography.RSACryptoServiceProvider()
RSA.FromXmlString(Privatekey)
Dim Result As New RSAResult(RSADecrypt(Data, RSA.ExportParameters(True), False))
Return Result
Catch ex As Exception
Throw New Exception("Decrypt(): " & ex.Message, ex)
End Try
End Function
Private Shared Function RSAEncrypt(ByVal DataToEncrypt() As Byte, ByVal RSAKeyInfo As RSAParameters, ByVal DoOAEPPadding As Boolean) As Byte()
Try
Dim encryptedData() As Byte
Using RSA As New RSACryptoServiceProvider
RSA.ImportParameters(RSAKeyInfo)
encryptedData = RSA.Encrypt(DataToEncrypt, DoOAEPPadding)
End Using
Return encryptedData
Catch e As CryptographicException
Throw New Exception("RSAEncrypt(): " & e.Message, e)
End Try
End Function
Private Shared Function RSADecrypt(ByVal DataToDecrypt() As Byte, ByVal RSAKeyInfo As RSAParameters, ByVal DoOAEPPadding As Boolean) As Byte()
Try
Dim decryptedData() As Byte
Using RSA As New RSACryptoServiceProvider
RSA.ImportParameters(RSAKeyInfo)
decryptedData = RSA.Decrypt(DataToDecrypt, DoOAEPPadding)
End Using
Return decryptedData
Catch e As CryptographicException
Throw New Exception("RSADecrypt(): " & e.Message, e)
End Try
End Function
RSAResult 类：
Imports System.Text
Public Class RSAResult
Private _Data() As Byte
Public Sub New(ByVal Data() As Byte)
_Data = Data
End Sub
Public ReadOnly Property AsBytes() As Byte()
Get
Return _Data
End Get
End Property
Public ReadOnly Property AsString() As String
Get
Dim ByteConverter As New UnicodeEncoding()
Return ByteConverter.GetString(_Data)
End Get
End Property
Public ReadOnly Property AsBase64String() As String
Get
Return Convert.ToBase64String(_Data)
End Get
End Property
End Class
生成的示例键：
私人的：
<RSAKeyValue>
<Modulus>AN3mGF2XtuTBC7jaBhPrVNYyheYX4HuCkhRpRXOCcKVOseahQBokzn555hIW0fK3kamVLOkSvSF6hP8rt1PC/Qs=</Modulus>
<Exponent>AQAB</Exponent>
<P>APeyh3iQRVNleEHNEx8cVCxYMIA7pCiSdYDGWJwf9meZ</P>
<Q>AOVWMMpSkGlHtHe8aIgu9xw1lUiJ6VZIxVckPyj8oOBD</Q>
<DP>AM20C+FKHuilSfuLbafWhOjWzGCSJ0AycTbigdAWkzFx</DP>
<DQ>AMCTd7TtT8aYJ7rDwyNYDLjrZcfbxsxlnxBlp4PLX2vx</DQ>
<InverseQ>AJ2/aZW5UR/pkQeA6BMKdhqqTWa5mjzMlnOga6zPlRdN</InverseQ>
<D>AShwPBzMkYkIXKCWo4f4211MIZVCUKKvzHd4K1Ak8lfiTH4oxB8fgq4aa2QT5ufDwedlKGJLnuY6Kv9SpkMOIQ==</D>
</RSAKeyValue>
上市：
<RSAKeyValue>
<Modulus>AN3mGF2XtuTBC7jaBhPrVNYyheYX4HuCkhRpRXOCcKVOseahQBokzn555hIW0fK3kamVLOkSvSF6hP8rt1PC/Qs=</Modulus>
<Exponent>AQAB</Exponent>
</RSAKeyValue>