sha256static.cls

这是一个在vb下实现的各种加密程序,可以实现一般的文本加密和文件加密,但是很多算法都是已经被人破解过的.

VERSION 1.0 CLASS
BEGIN
  MultiUse = -1  'True
  Persistable = 0  'NotPersistable
  DataBindingBehavior = 0  'vbNone
  DataSourceBehavior  = 0  'vbNone
  MTSTransactionMode  = 0  'NotAnMTSObject
END
Attribute VB_Name = "SHA256Static"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = True
Attribute VB_PredeclaredId = False
Attribute VB_Exposed = True
'    CopyRight (c) 2006 Kelly Ethridge
'
'    This file is part of VBCorLib.
'
'    VBCorLib is free software; you can redistribute it and/or modify
'    it under the terms of the GNU Library General Public License as published by
'    the Free Software Foundation; either version 2.1 of the License, or
'    (at your option) any later version.
'
'    VBCorLib is distributed in the hope that it will be useful,
'    but WITHOUT ANY WARRANTY; without even the implied warranty of
'    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
'    GNU Library General Public License for more details.
'
'    You should have received a copy of the GNU Library General Public License
'    along with Foobar; if not, write to the Free Software
'    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
'
'    Module: SHA256Static
'

''
' Provides methods associated with the SHA-256 class.
'
Option Explicit

Private mK()    As Long
Private mKPtr   As Long


''
' Creates a new instance of an SHA-256 implementation.
'
' @param AlgName The name of the implementation to create an instance of.
' @return A new SHA-256 compatible implementation.
' @remarks If not name is given, then a new SHA256Managed is returned.
'
Public Function Create(Optional ByVal AlgName As String = "SHA256") As SHA256
    Set Create = CryptoConfig.CreateFromName(AlgName)
End Function


'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
'   Friend Interface
'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
Friend Property Get KPtr() As Long
    If mKPtr = vbNullPtr Then
        mK = Cor.NewLongs(&H428A2F98, &H71374491, &HB5C0FBCF, &HE9B5DBA5, &H3956C25B, &H59F111F1, &H923F82A4, &HAB1C5ED5, _
                          &HD807AA98, &H12835B01, &H243185BE, &H550C7DC3, &H72BE5D74, &H80DEB1FE, &H9BDC06A7, &HC19BF174, _
                          &HE49B69C1, &HEFBE4786, &HFC19DC6, &H240CA1CC, &H2DE92C6F, &H4A7484AA, &H5CB0A9DC, &H76F988DA, _
                          &H983E5152, &HA831C66D, &HB00327C8, &HBF597FC7, &HC6E00BF3, &HD5A79147, &H6CA6351, &H14292967, _
                          &H27B70A85, &H2E1B2138, &H4D2C6DFC, &H53380D13, &H650A7354, &H766A0ABB, &H81C2C92E, &H92722C85, _
                          &HA2BFE8A1, &HA81A664B, &HC24B8B70, &HC76C51A3, &HD192E819, &HD6990624, &HF40E3585, &H106AA070, _
                          &H19A4C116, &H1E376C08, &H2748774C, &H34B0BCB5, &H391C0CB3, &H4ED8AA4A, &H5B9CCA4F, &H682E6FF3, _
                          &H748F82EE, &H78A5636F, &H84C87814, &H8CC70208, &H90BEFFFA, &HA4506CEB, &HBEF9A3F7, &HC67178F2)
        
        mKPtr = VarPtr(mK(0))
    End If
    
    KPtr = mKPtr
End Property