.NET 推进 4GL 密码学

Question

我有一个 VB.NET 应用程序，我正在尝试将加密信息发送到 Progress 4GL 10.2B 应用程序。我已经匹配了迭代计数、盐、私钥和初始化向量。我不明白为什么我们要生成不同的密钥。我在 .NET 中使用 silverlight，rfc2898derivebytes 类使用 HMACSHA-1 散列算法，因为进度使用 SHA-1 散列算法。我想看看如何映射这两个系统来传输简单的字符串。

下面是VB.NET代码

enter codePublic Class OASISCryptography

Const _privateKey As String = "MEXMUELLER"

Public Shared Function GetSalt() As Byte()
    Dim salt() As Byte = New Byte(7) {}
    Dim s As New RNGCryptoServiceProvider
    s.GetBytes(salt)
    Return salt
End Function

Public Shared Function EncryptValue(ByVal data As String, ByVal salt() As Byte) As Byte()
    Using myAes As New AesManaged()
        Dim salt2() As Byte = System.Text.Encoding.UTF8.GetBytes("JosephsT")
        Dim Key As System.Security.Cryptography.Rfc2898DeriveBytes = New Rfc2898DeriveBytes(_privateKey, salt, 2000)
        myAes.Key = Key.GetBytes(128 / 8)
        myAes.IV = System.Text.Encoding.UTF8.GetBytes("HR$2pIjHR$2pIj12")
        Dim encrypted As Byte() = EncryptStringFunction(data, myAes.Key, myAes.IV)
        Return encrypted
    End Using
End Function

Public Shared Function DecryptValue(ByVal data() As Byte, ByVal salt() As Byte) As String
    Using myAes As New AesManaged()
        Dim salt2() As Byte = System.Text.Encoding.UTF8.GetBytes("JosephsT")
        Dim Key As System.Security.Cryptography.Rfc2898DeriveBytes = New Rfc2898DeriveBytes(_privateKey, salt2, 2000)
        myAes.Key = Key.GetBytes(128 / 8)
        Dim genKey As String = Nothing
        For Each g In myAes.Key
            genKey = genKey & g
        Next
        myAes.IV = System.Text.Encoding.UTF8.GetBytes("HR$2pIjHR$2pIj12")
        Dim decrypted As String = DecryptStringFunction(data, myAes.Key, myAes.IV)
        Return decrypted
    End Using
End Function

Public Shared Function EncryptStringFunction(ByVal data As String, ByVal Key() As Byte, ByVal IV() As Byte) As Byte()
    'check arguments
    If data Is Nothing OrElse data.Length <= 0 Then
        Throw New ArgumentNullException("data")
    End If
    If Key Is Nothing Or Key.Length <= 0 Then
        Throw New ArgumentNullException("Key")
    End If
    If IV Is Nothing Or IV.Length <= 0 Then
        Throw New ArgumentNullException("IV")
    End If
    Dim encrypted() As Byte
    Using aesALG As New AesManaged()
        aesALG.Key = Key
        aesALG.IV = IV
        ' Create a encryptor to perform the stream transform. 
        Dim encryptor As ICryptoTransform = aesALG.CreateEncryptor(aesALG.Key, aesALG.IV)
        ' 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(data)
                End Using
            End Using
            encrypted = msEncrypt.ToArray
        End Using
    End Using
    Return encrypted
End Function

Public Shared Function DecryptStringFunction(ByVal encrytedData() As Byte, ByVal Key() As Byte, ByVal IV() As Byte) As String
    If encrytedData Is Nothing Or encrytedData.Length <= 0 Then
        Throw New ArgumentNullException("EncryptedData")
    End If
    If Key Is Nothing Or Key.Length <= 0 Then
        Throw New ArgumentNullException("Key")
    End If
    If IV Is Nothing Or IV.Length <= 0 Then
        Throw New ArgumentNullException("IV")
    End If
    Dim plainText As String = Nothing
    Using aesALG As New AesManaged()
        aesALG.Key = Key
        aesALG.IV = IV
        Dim decryptor As ICryptoTransform = aesALG.CreateDecryptor(aesALG.Key, aesALG.IV)
        Using msDecrypt As New MemoryStream(encrytedData)
            Using csDecrypt As New CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read)
                Using srDecrypt As New StreamReader(csDecrypt, True)                     
                    plainText = srDecrypt.ReadToEnd
                End Using
            End Using
        End Using
    End Using
    Return plainText
End Function
End Class

这是进度实现

SECURITY-POLICY:SYMMETRIC-ENCRYPTION-ALGORITHM = "AES_CBC_128".
SECURITY-POLICY:PBE-KEY-ROUNDS = 2000.
SECURITY-POLICY:PBE-HASH-ALGORITHM = "SHA-1".   
 /*SECURITY-POLICY:SYMMETRIC-ENCRYPTION-IV = ? /*mymemptr*/ /*IV*/. */

/* first, decrypt username */
SECURITY-POLICY:ENCRYPTION-SALT = ip-value3.
SECURITY-POLICY:SYMMETRIC-ENCRYPTION-KEY = GENERATE-PBE-KEY (password,ip-value3).
qadusername = get-string(DECRYPT (ip-value1),1).
qadpasswd = get-string(DECRYPT (ip-value2),1).
output to /tmp/decrypt.tst append.
put unformatted qadusername "-" qadpasswd skip .
output close.

qadusername = replace(qadusername,"SPD/","").
for first usr_mstr no-lock where
usr_mstr.usr_active and
usr_userid = qadusername and
usr_passwd = encode(qadpasswd) :
op-value1= true.
END.

/* second, encrypt a value and send back*/
/*
SECURITY-POLICY:ENCRYPTION-SALT = GENERATE-PBE-SALT.*/
salt-value = SECURITY-POLICY:ENCRYPTION-SALT.
/*
SECURITY-POLICY:SYMMETRIC-ENCRYPTION-KEY = GENERATE-PBE-KEY (password,ip-value3).
 */
op-value2 = ENCRYPT ("joe wears a tootoo and a dress!").
op-value3 = salt-value.
op-value4 = IV.
op-value5 = GENERATE-PBE-KEY (password).

Answer 1

我知道我正在回答我自己的问题，但如果有人有更好的方法来做到这一点，请告诉我......对于任何试图完成此任务的人，您都需要此代码。我目前有 IV 静态，但为了很好的衡量，你通常不会这样做。您将动态生成并传递它

 Public Shared Function EncryptValue(ByVal data As String, ByVal salt() As Byte) As Byte()
    Using myAes As New AesManaged
        Dim key2 As PasswordDeriveBytes = New PasswordDeriveBytes(_privateKey, salt)
        key2.IterationCount = 2000
        key2.HashName = "SHA1"
        myAes.Padding = PaddingMode.PKCS7
        myAes.Mode = CipherMode.CBC
        myAes.KeySize = myAes.LegalKeySizes(0).MinSize
        myAes.BlockSize = myAes.LegalBlockSizes(0).MinSize
        myAes.IV = System.Text.Encoding.UTF8.GetBytes("HR$2pIjHR$2pIj12")
        myAes.Key = key2.GetBytes(16)
        Dim encrypted As Byte() = EncryptStringFunction(data, myAes.Key, myAes.IV)
        Return encrypted
    End Using
End Function

Public Shared Function DecryptValue(ByVal data() As Byte, ByVal salt() As Byte) As String
    Using myAes As New AesManaged
        Dim key2 As PasswordDeriveBytes = New PasswordDeriveBytes(_privateKey, salt)
        key2.IterationCount = 2000
        key2.HashName = "SHA1"            
        myAes.Padding = PaddingMode.PKCS7
        myAes.Mode = CipherMode.CBC
        myAes.KeySize = myAes.LegalKeySizes(0).MinSize
        myAes.BlockSize = myAes.LegalBlockSizes(0).MinSize
        myAes.IV = System.Text.Encoding.UTF8.GetBytes("HR$2pIjHR$2pIj12")
        myAes.Key = key2.GetBytes(16)
        Dim decrypted As String = DecryptStringFunction(data, myAes.Key, myAes.IV)
        Return decrypted
    End Using
End Function