在ASP中加密方法有对应的解密方法好象不多,现在根据前辈资料整理出在asp中加密与解密函数
rsa.asp <% rem 在ASP中实现加密与解密,加密方法:根据RSA rem 联系:hnsoso@sina.com Class clsRSA
Public PrivateKey Public PublicKey Public Modulus Public Function Crypt(pLngMessage, pLngKey) On Error Resume Next Dim lLngMod Dim lLngResult Dim lLngIndex If pLngKey Mod 2 = 0 Then lLngResult = 1 For lLngIndex = 1 To pLngKey / 2 lLngMod = (pLngMessage ^ 2) Mod Modulus ' Mod may error on key generation lLngResult = (lLngMod * lLngResult) Mod Modulus If Err Then Exit Function Next Else lLngResult = pLngMessage For lLngIndex = 1 To pLngKey / 2 lLngMod = (pLngMessage ^ 2) Mod Modulus On Error Resume Next ' Mod may error on key generation lLngResult = (lLngMod * lLngResult) Mod Modulus If Err Then Exit Function Next End If Crypt = lLngResult End Function
Public Function Encode(ByVal pStrMessage) Dim lLngIndex Dim lLngMaxIndex Dim lBytAscii Dim lLngEncrypted lLngMaxIndex = Len(pStrMessage) If lLngMaxIndex = 0 Then Exit Function For lLngIndex = 1 To lLngMaxIndex lBytAscii = Asc(Mid(pStrMessage, lLngIndex, 1)) lLngEncrypted = Crypt(lBytAscii, PublicKey) Encode = Encode & NumberToHex(lLngEncrypted, 4) Next End Function Public Function Decode(ByVal pStrMessage) Dim lBytAscii Dim lLngIndex Dim lLngMaxIndex Dim lLngEncryptedData Decode = "" lLngMaxIndex = Len(pStrMessage) For lLngIndex = 1 To lLngMaxIndex Step 4 lLngEncryptedData = HexToNumber(Mid(pStrMessage, lLngIndex, 4)) lBytAscii = Crypt(lLngEncryptedData, PrivateKey) Decode = Decode & Chr(lBytAscii) Next End Function Private Function NumberToHex(ByRef pLngNumber, ByRef pLngLength) NumberToHex = Right(String(pLngLength, "0") & Hex(pLngNumber), pLngLength) End Function
Private Function HexToNumber(ByRef pStrHex) HexToNumber = CLng("&h" & pStrHex) End Function
End Class %>
test.asp <!--#INCLUDE FILE="RSA.asp"--> <% function Encryptstr(Message) Dim LngKeyE Dim LngKeyD Dim LngKeyN Dim StrMessage Dim ObjRSA
LngKeyE = "32823" LngKeyD = "20643" LngKeyN = "29893" StrMessage = Message Set ObjRSA = New clsRSA ObjRSA.PublicKey = LngKeyE ObjRSA.Modulus = LngKeyN Encryptstr = ObjRSA.Encode(StrMessage) Set ObjRSA = Nothing end function
function decryptstr(Message) Dim LngKeyE Dim LngKeyD Dim LngKeyN Dim StrMessage Dim ObjRSA
LngKeyE = "32823" LngKeyD = "20643" LngKeyN = "29893" StrMessage = Message Set ObjRSA = New clsRSA
ObjRSA.PrivateKey =LngKeyD ObjRSA.Modulus=LngKeyN decryptstr=ObjRSA.Decode(StrMessage) Set ObjRSA = Nothing end function
dim last,first first="sohu" Response.Write "加密前为:"&first last=Encryptstr(first) Response.Write "加密后为"&last Response.Write "解密后为" &decryptstr(last)
%>
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