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Will the following function correctly hash my provided string? Or am I missing something fundamentally important?
Private Function HashString(ByVal value As String, ByVal salt As String) As String
Dim dataBytes As Byte() = System.Text.Encoding.UTF8.GetBytes(value + salt)
Dim hash As New System.Security.Cryptography.SHA512Managed
Dim hashBytes As Byte() = hash.ComputeHash(dataBytes)
Return Convert.ToBase64String(hashBytes)
End Function
Looks fine to me. Allowing for a salt is important – though it’s still left to the caller to ensure the salt is unique.