I had a bit of a struggle recently trying to get .NET to hash a string
that would match PHPs built in MD5 hashing. Ended up that it was a
string encoding issue, heres how I got it to work:
'--------------------------------------------------------------------
' Hash the string to match PHPs MD5
'--------------------------------------------------------------------
Private Function Hash(ByVal sValue As String) As String
Dim oTextBytes As Byte() =
System.Text.Encoding.ASCII.GetBytes(sValue)
Dim cryptHandler As
System.Security.Cryptography.MD5CryptoServiceProvider
cryptHandler = New System.Security.Cryptography.MD5CryptoServiceProvider
Dim oHash As Byte() = cryptHandler.ComputeHash(oTextBytes)
Return LCase(EncodeHexString(oHash))
End Function
'--------------------------------------------------------------------
' Encode the hex string to match PHP MD5
'--------------------------------------------------------------------
Public Function EncodeHexString(ByVal sArray As Byte()) as String
Dim sb As System.text.StringBuilder = New
System.text.StringBuilder(sArray.Length * 2)
Dim index As Integer
For index = 0 To sArray.Length - 1
sb.AppendFormat("{0:X2}",
sArray(index))
Next
Return sb.ToString()
End Function
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