在asp中通过vbs类实现rsa加密与解密的代码
在asp中通过vbs类实现rsa加密与解密,建议入精华
本文章有两文件组成
test.asp 测试演示文件
clsrsa.asp 实现rsa加密与解密的vbs类文件
下面是代码:
1. test.asp
复制代码 代码如下:
<% rem 文章标题:在asp中通过vbs类实现rsa加密与解密 rem 收集整理:yanek rem 联系:aspboy@263.net %> <%Option Explicit%> <!--#INCLUDE FILE="clsRSA.asp"--> <% Dim LngKeyE Dim LngKeyD Dim LngKeyN Dim StrMessage Dim ObjRSA If Not Request.Form = "" Then LngKeyE = Request.Form("KeyE") LngKeyD = Request.Form("KeyD") LngKeyN = Request.Form("KeyN") StrMessage = Request.Form("Message") Set ObjRSA = New clsRSA Select Case Request.Form("Action") Case "Generate Keys" Call ObjRSA.GenKey() LngKeyE = ObjRSA.PublicKey LngKeyD = ObjRSA.PrivateKey LngKeyN = ObjRSA.Modulus Case "Encrypt" ObjRSA.PublicKey = LngKeyE ObjRSA.Modulus = LngKeyN StrMessage = ObjRSA.Encode(StrMessage) Case "Decrypt" ObjRSA.PrivateKey = LngKeyD ObjRSA.Modulus = LngKeyN StrMessage = ObjRSA.Decode(StrMessage) End Select Set ObjRSA = Nothing End If %> <HTML> <HEAD> <TITLE>RSA Cipher Demonstration</TITLE> </HEAD> <BODY> <H1>RSA Cipher Demonstration</H1> <P> You will first need to generate your public/privage key-pair before you can encrypt/decrypt messages. </P> <FORM method="post"> <TABLE> <TR> <TD>Public Key</TD> <TD><INPUT name="KeyE" value="<%=Server.HTMLEncode(LngKeyE)%>"></TD> <TD rowspan="3"> <INPUT type="Submit" name="Action" value="Generate Keys"> </TD> </TR> <TR> <TD>Private Key</TD> <TD><INPUT name="KeyD" value="<%=Server.HTMLEncode(LngKeyD)%>"></TD> </TR> <TR> <TD>Modulus</TD> <TD><INPUT name="KeyN" value="<%=Server.HTMLEncode(LngKeyN)%>"></TD> </TR> <TR> <TD colspan="3"> Test Message:<BR> <TEXTAREA name="Message" cols="50" rows="7"><%=Server.HTMLEncode(StrMessage)%></TEXTAREA> </TD> </TR> <TR> <TD align="right" colspan="3"> <INPUT type="Submit" name="Action" value="Encrypt"> <INPUT type="Submit" name="Action" value="Decrypt"> </TD> </TR> </TABLE> </FORM> </BODY> </HTML>
clsrsa.asp
复制代码 代码如下:
<% rem 实现rsa加密与解密的vbs类文件 rem 文章标题:在asp中通过vbs类实现rsa加密与解密 rem 收集整理:yanek rem 联系:aspboy@263.net ' RSA Encryption Class ' ' .PrivateKey ' Your personal private key. Keep this hidden. ' ' .PublicKey ' Key for others to encrypt data with. ' ' .Modulus ' Used with both public and private keys when encrypting ' and decrypting data. ' ' .GenKey() ' Creates Public/Private key set and Modulus ' ' .Crypt(pLngMessage, pLngKey) ' Encrypts/Decrypts message and returns ' as a string. ' ' .Encode(pStrMessage) ' Encrypts message and returns in double-hex format ' ' .Decode(pStrMessage) ' Decrypts message from double-hex format and returns a string ' Class clsRSA Public PrivateKey Public PublicKey Public Modulus Public Sub GenKey() Dim lLngPhi Dim q Dim p Randomize Do Do ' 2 random primary numbers (0 to 1000) Do p = Rnd * 1000 \ 1 Loop While Not IsPrime(p) Do q = Rnd * 1000 \ 1 Loop While Not IsPrime(q) ' n = product of 2 primes Modulus = p * q \ 1 ' random decryptor (2 to n) PrivateKey = Rnd * (Modulus - 2) \ 1 + 2 lLngPhi = (p - 1) * (q - 1) \ 1 PublicKey = Euler(lLngPhi, PrivateKey) Loop While PublicKey = 0 Or PublicKey = 1 ' Loop if we can't crypt/decrypt a byte Loop While Not TestCrypt(255) End Sub Private Function TestCrypt(ByRef pBytData) Dim lStrCrypted lStrCrypted = Crypt(pBytData, PublicKey) TestCrypt = Crypt(lStrCrypted, PrivateKey) = pBytData End Function Private Function Euler(ByRef pLngPHI, ByRef pLngKey) Dim lLngR(3) Dim lLngP(3) Dim lLngQ(3) Dim lLngCounter Dim lLngResult Euler = 0 lLngR(1) = pLngPHI: lLngR(0) = pLngKey lLngP(1) = 0: lLngP(0) = 1 lLngQ(1) = 2: lLngQ(0) = 0 lLngCounter = -1 Do Until lLngR(0) = 0 lLngR(2) = lLngR(1): lLngR(1) = lLngR(0) lLngP(2) = lLngP(1): lLngP(1) = lLngP(0) lLngQ(2) = lLngQ(1): lLngQ(1) = lLngQ(0) lLngCounter = lLngCounter + 1 lLngR(0) = lLngR(2) Mod lLngR(1) lLngP(0) = ((lLngR(2)\lLngR(1)) * lLngP(1)) + lLngP(2) lLngQ(0) = ((lLngR(2)\lLngR(1)) * lLngQ(1)) + lLngQ(2) Loop lLngResult = (pLngKey * lLngP(1)) - (pLngPHI * lLngQ(1)) If lLngResult > 0 Then Euler = lLngP(1) Else Euler = Abs(lLngP(1)) + pLngPHI End If End Function 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 Private Function IsPrime(ByRef pLngNumber) Dim lLngSquare Dim lLngIndex IsPrime = False If pLngNumber < 2 Then Exit Function If pLngNumber Mod 2 = 0 Then Exit Function lLngSquare = Sqr(pLngNumber) For lLngIndex = 3 To lLngSquare Step 2 If pLngNumber Mod lLngIndex = 0 Then Exit Function Next IsPrime = True 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 %>
演示地址:http://www.cnaspol.com/myrsa/test.asp