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[原创文章] 关于国内某知名大学网站加密算法的研究

原创作者:柔肠寸断 [3.A.S.T]  http://www.3ast.com.cm
" H6 v0 h* a+ g- j0 Y原始出处:http://www.3ast.com.cm
$ S1 `1 R1 k2 L0 w
% i& h' ]0 n% W+ |+ `5 q看不懂的直接绕过
" h) c1 H. R1 S1 [加密前为:hwy123456
5 k: i+ U  B8 ?. h& n9 S' s/ g' {2 ?加密后为0F9C1C7A2EE76EBB5C1F4D7526CC4F883F4E/ D" S: f( y; Y! k( [

2 o* E6 }& H" K; L============================================
2 q6 O# e& ?3 I+ h3 p5 [! ?& F上面是当时自己校内的心情。现在已经解破出来了,分享给大家
" M5 {, B! J6 m% @8 G4 M, T也就不隐瞒大家什么了,这个是国内某知名大学的后台加密算法
- n5 O, E1 h3 K% l8 \5 H以下是RSA算法文件
3 M8 s9 J! f5 K! |/ }& F8 E# k
3 K" m0 I# w* J' P6 |文件名RSA.ASP" g- D9 z. w, F  B4 e
===============================================
, `$ j% }8 W( r: A6 J<% 2 y8 k/ k9 P- d( F1 n6 u& ]9 a
Class clsRSA
9 X9 \; q( h/ X# {9 OPublic PrivateKey 7 z* l6 Y5 _' g: f8 k+ _! c
Public PublicKey / a- U2 c0 N4 o! e( ^1 [
Public Modulus   y! L2 g' ^7 }* T
Public Function Crypt(pLngMessage, pLngKey) 1 `2 f, ]5 d1 e3 C/ s
On Error Resume Next
1 W' q! _1 p( r7 ^$ z/ [3 JDim lLngMod
# a5 w3 S/ c% k' {- `# UDim lLngResult   r/ p; R  {' c+ q! f
Dim lLngIndex
- l) m9 B' b: I- l" B% e4 G% ^' ~If pLngKey Mod 2 = 0 Then 0 U. z( P" Z, K7 t" G8 \+ N
lLngResult = 1
( ~+ }( b8 R6 J0 u$ L, _For lLngIndex = 1 To pLngKey / 2 5 X# O1 \' X  ?% E( ?0 G" T# ^% W6 m3 `
lLngMod = (pLngMessage ^ 2) Mod Modulus
, z/ Z" l* W- ]+ T) h+ ~) ]' Mod may error on key generation 4 O7 |0 ~6 s2 B/ |/ }3 c& i
lLngResult = (lLngMod * lLngResult) Mod Modulus 0 z0 D& c6 E: B/ o3 n/ P/ k
If Err Then Exit Function
; @3 S& Q2 b* S2 P% YNext
/ a! E2 A7 [. @+ w1 s( tElse 7 `, r/ F. Z0 p
lLngResult = pLngMessage
3 _" s. j+ `2 T1 G. FFor lLngIndex = 1 To pLngKey / 2 # H) ~% Z3 M$ y' n+ K  A
lLngMod = (pLngMessage ^ 2) Mod Modulus
+ h1 `3 l# K) g  n. d' Q3 |On Error Resume Next
7 |, @+ S0 U9 P4 a9 I% W/ z' Mod may error on key generation
3 w' J2 ^7 |* [# a3 OlLngResult = (lLngMod * lLngResult) Mod Modulus
2 }! R  I9 H1 qIf Err Then Exit Function * Z) ^0 k# }7 ~6 Z" M, o, M
Next
3 Z) \5 D) Y& ?5 j# W% u# WEnd If
) \* }; v% l3 a; b: iCrypt = lLngResult 0 E* `: n0 ^' m' g4 x
End Function/ ^8 V# n. {1 r' |3 R- i

7 a7 K; X$ U  n! e$ s7 v7 CPublic Function Encode(ByVal pStrMessage) 9 s0 b4 g) B* \9 E5 \$ K0 i
Dim lLngIndex ! ]' k0 W( ?  B9 J( w% S
Dim lLngMaxIndex 5 ]. @3 c* L: N0 }4 F, C% M( F2 H
Dim lBytAscii
2 m0 z3 G' A. t" ^: r6 W! CDim lLngEncrypted % A4 j* Z( N2 t9 k
lLngMaxIndex = Len(pStrMessage) . [8 e. X/ n, o9 H0 B
If lLngMaxIndex = 0 Then Exit Function ' V) C5 d0 y/ L2 N% C4 ^
For lLngIndex = 1 To lLngMaxIndex
( \' G) ]& f6 u+ |lBytAscii = Asc(Mid(pStrMessage, lLngIndex, 1))
% s3 Q3 L. L8 {& Z1 z9 H9 s  KlLngEncrypted = Crypt(lBytAscii, PublicKey) , P* j6 Y  W- p- }! y
Encode = Encode & NumberToHex(lLngEncrypted, 4) $ z$ l/ l9 x' ^; z: c7 X
Next
: K" X# U7 y# `End Function
0 l: M6 E: u9 J5 O) A* |+ {1 F) DPublic Function Decode(ByVal pStrMessage) 3 v  a5 d, B  z2 G+ L  U8 g+ Q- L
Dim lBytAscii
  P! Z2 }/ l- X5 g* }& Y: JDim lLngIndex
% @( i( q1 l$ W! ZDim lLngMaxIndex
6 t* s9 _5 ]6 q3 [, `% BDim lLngEncryptedData
& r5 u, x: q" D7 Q- iDecode = "" + V2 O, o% g; S& t8 I" l6 W9 h0 S
lLngMaxIndex = Len(pStrMessage) ) ^0 V( |6 E' s
For lLngIndex = 1 To lLngMaxIndex Step 4
0 L, F# Q& R7 \lLngEncryptedData = HexToNumber(Mid(pStrMessage, lLngIndex, 4))
( ]" `0 E; E$ ]0 C" qlBytAscii = Crypt(lLngEncryptedData, PrivateKey)
0 H( ^$ r! z. i6 _* `% zDecode = Decode & Chr(lBytAscii)
* K& x  M0 Q- Y& ?2 ?Next
8 I5 c& O) `1 s& B# l$ T3 @! GEnd Function
* D8 v2 }0 L3 A8 k( l4 N, TPrivate Function NumberToHex(ByRef pLngNumber, ByRef pLngLength) # {0 B& l+ F; z* Z- X7 X7 B
NumberToHex = Right(String(pLngLength, "0") & Hex(pLngNumber), pLngLength)
; N$ m4 [+ }0 b' ?( @4 A. D( U7 [3 pEnd Function   S& P1 i: G% F+ P
Private Function HexToNumber(ByRef pStrHex) - B/ c1 l0 _7 p1 Z; C
HexToNumber = CLng("&h" & pStrHex) , _" X+ K5 v+ n2 _/ H# x
End Function 8 j, h, I2 \% H* v+ W1 m5 q& P: C
End Class 6 S7 Y2 p. m* E- [1 H
function Encryptstr(Message) ! \' B0 m, B  ~0 b8 W3 |  \1 J1 t5 t
Dim LngKeyE % z  p0 P6 h4 G( s. W5 h
Dim LngKeyD / c" `4 ]* Q  p7 A$ U! o: W& R
Dim LngKeyN , K! A7 j# k2 E7 h/ i
Dim StrMessage ( g- I: Z" n3 F9 p7 v8 `" ^
Dim ObjRSA * B! \, l; U% j7 w
LngKeyE = "32823" 9 z% H9 E; u9 |* P+ E
LngKeyD = "20643"
) Q, j( @' A! X; A1 d; d* S" jLngKeyN = "29893"
. J; |1 B% t" FStrMessage = Message
" a6 j/ P6 n  c" }2 fSet ObjRSA = New clsRSA . A  Y" m" f9 \" a2 `  i0 J
ObjRSA.PublicKey = LngKeyE
+ ?3 k' G7 e' h  T( ~ObjRSA.Modulus = LngKeyN
  d& T$ B* u- H$ q& r4 XEncryptstr = ObjRSA.Encode(StrMessage)
7 `0 O" e; y  X  d9 _: {Set ObjRSA = Nothing 2 p0 B: U) P; T4 |  s7 O
end function; f2 C4 b  N2 B& U+ V( I. {
Function Decryptstr(Message)
; E  z0 ?6 Q! A( I1 xDim LngKeyE
" v: T: U, z: Z  e5 {4 ~  F! @+ vDim LngKeyD / N% d* \% _% @  I4 ?, w& ]# _+ M6 A: z
Dim LngKeyN 3 O; P, `* M9 B8 N& ^
Dim StrMessage
0 {2 F2 F7 C# x9 z, |3 ADim ObjRSA 3 s" I: a* o) Z( F6 g" s
LngKeyE = "32823" , B# Y  _# D; t4 L; E0 H7 y
LngKeyD = "20643"
2 a2 q- @. P/ C- ^LngKeyN = "29893"
% w. j! d1 n1 D9 M8 p* P, B$ a! QStrMessage = Message
6 `4 A" q. s) b3 G5 }' ESet ObjRSA = New clsRSA % W* B+ ^5 s1 w4 X2 X. X3 X
ObjRSA.PrivateKey =LngKeyD
' P/ F% f( d4 u% n  rObjRSA.Modulus=LngKeyN 4 M' }6 a/ M: T6 k3 B# R
decryptstr=ObjRSA.Decode(StrMessage)
% v: G; q# Z2 d  Y- \" m8 nSet ObjRSA = Nothing 1 E: k. o4 Q6 D# X- H
end function
0 r* W' x/ h" o3 j/ q8 x%>, ~' o, F9 k& L: e5 a, }, l
===============================================0 O8 ?- g+ e) J1 @  i5 l
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还有一个用于测试这段代码的test.asp/ Z  k. s1 C5 Q/ m; h6 R
有兴趣的自己搭建个IIS测试下0 j9 R- U& z( y1 R
<!--#INCLUDE FILE="RSA.asp"--> ! f. p8 f0 k2 J. I" i
<%
4 T' v# K5 T2 ]. Y; lfunction Encryptstr(Message) , n* j# F( d: X" ^; x* p
Dim LngKeyE 6 N2 I* Z( f0 v% q: D9 S* c$ z
Dim LngKeyD 4 A' g# S+ R; Z+ U6 O% h
Dim LngKeyN
$ Y. u# A$ ^' Y, C0 \Dim StrMessage $ R+ g. ?% }# P% B$ S* M) O2 s5 t
Dim ObjRSA
6 w! r- Y: j8 N! x3 v. kLngKeyE = "32823" ) K: a. i4 {- u1 V  O0 a+ h  k
LngKeyD = "20643"
# z* m  Y3 k/ X& H/ w; d6 r3 j/ eLngKeyN = "29893"
6 g' a: g4 b; |1 C- Q, UStrMessage = Message   i+ x& g9 `* |0 Y: F1 c
Set ObjRSA = New clsRSA
% ^4 e% V* Q" eObjRSA.PublicKey = LngKeyE
7 q8 u0 s& z6 o; X* QObjRSA.Modulus = LngKeyN , T5 J! T  f0 p; g( O
Encryptstr = ObjRSA.Encode(StrMessage)
4 A4 ]2 v4 g2 @, I  j" I0 a4 ESet ObjRSA = Nothing " h% K6 K+ T! N0 ^
end function - r% p- ?1 d" }
function decryptstr(Message)
# F# [  t: N7 K! C+ vDim LngKeyE - A2 w' g$ }  \) A2 [
Dim LngKeyD 0 S+ W# T) M& X
Dim LngKeyN ( \2 b; n  R. n4 d
Dim StrMessage 7 u& o( {) q6 r: _( R* ~8 m
Dim ObjRSA
0 J2 C; l5 j  r: K2 u7 F& NLngKeyE = "32823"
7 n8 w) n4 ~9 N" j( U6 \! }5 _LngKeyD = "20643" 1 t( j! g3 i8 \
LngKeyN = "29893"
% S+ H# Q( i1 r/ W  ^StrMessage = Message - C2 V5 r: x6 I* j9 I$ [9 p" W' D
Set ObjRSA = New clsRSA
4 P9 l& ~$ _  @) X4 }ObjRSA.PrivateKey =LngKeyD 6 _. P! p4 `/ A& a
ObjRSA.Modulus=LngKeyN : s# h, I: l3 R$ h* F/ z
decryptstr=ObjRSA.Decode(StrMessage) * D; ]9 L8 K/ s9 |# C6 o4 `) H' Q
Set ObjRSA = Nothing
1 v) s+ K. A3 S) j7 ?% q+ ^' nend function ' D9 y) T0 K' f7 s9 h4 @' @
dim last,first 9 K( Q7 z2 m% D: Q
first="!@#$%^&*()"
8 S+ S! _+ J7 C$ e% eResponse.Write "加密前为:"&first
! K& C: N8 o6 Flast=Encryptstr(first)
! a4 P8 B3 m0 `0 h; [7 t1 _# tResponse.Write "加密后为"&last
$ m& S( X3 ]$ }' _3 v! CResponse.Write "解密后为" &decryptstr(last)
$ z- o3 ~7 X. U9 C3 g$ t%> ==============================================" z$ H& W, }. y" y. B6 q
剩下的就是字符的对照表了! A+ C# s9 V! b+ G1 {0 Q" F! @- B
===================字符集================6 K* E8 S; `* o) c3 C
1_____6EBB& w* f. D' |+ k" C
2_____5C1F
( u$ j6 e! d% H$ ]3_____4D75
$ S* Z* s1 @- F# o) D, a4_____26CC3 F  s+ F* n9 J, p$ ~" d# U
5_____4F88
) n4 G: Q5 z( w, A2 d1 V3 B, R: P# I" P6_____3F4E: ~7 Y8 e0 k" C' m
7_____0A9D' B0 G9 m+ b2 d. B$ L
8_____1A1C
, T2 _4 E- a. I6 K3 j+ w- u; }7 c9_____6D20
3 C- h; O; Q1 Y6 l3 J0_____1089
# r" I" f4 @& ]0 o  O3 Wa_____0F3E
# H$ l- W' T, C: J/ q0 b7 Rb_____3159
- d7 u9 U& F/ I% q5 B6 Xc_____3517
8 z( k7 J6 I& w( t0 t$ P/ Wd_____419C
% ^3 s# ?* \4 z9 O- |0 k0 }e_____615C
0 o! r) q4 I2 m+ G9 w9 r/ q/ qf_____556F
# W. y. G4 |+ H' E0 Y# [g_____2B7F$ h9 t  y4 t& ?' m* z
h_____0F9C# J: C, S" f1 ]
i_____00FA
/ S) }0 ]# ~5 sj_____5A509 o' p3 _" H7 y
k_____28504 H! `! z9 C& M4 C, u9 {3 I8 I
l_____3E7B' j3 u7 q0 Q6 p7 E) e) [, P+ d
m_____71C51 L) ^6 Q, L( v0 k9 l) ?
n_____1FC8
, s  Y0 ]$ d; I! T2 Wo_____74C1
" S0 x' ]0 W! f8 op_____5FB8
8 `# v+ v9 w- P5 z" dq_____60854 s& S2 d" o# u! x2 u5 Z! R/ v) g
r_____3AC4
! K0 z9 ]6 t3 w: G6 M1 Ds_____2F50; o+ z0 Q, U; ~* G/ g4 p/ M
t_____36F80 h, k7 E9 `( L* S& `% W$ Q
u_____7010
1 `3 P! E! X2 D3 \v_____0B42" a; G7 X& R9 S1 H
w_____1C7A
. m6 ?! R( ^2 D' lx_____16F88 ?$ B9 @7 K/ Z+ \# u& y
y_____2EE7
  X2 Q6 i) p  Q& `% F9 f: {: R4 mz_____5CF3( `) R# K9 z' M) n& I
!_____6233# Z( F' S+ _/ J4 E  ?
@_____3A45
# I$ u  z6 |5 C6 g2 M/ _8 S9 W#_____22913 d1 Y3 F' b' c% h3 ]- Y
$_____5D5C, P  T8 ^( f) e& U7 I# J3 y( G
%_____09B9
/ v& `; B" N& L4 {+ i0 X^_____43EA
" L: I% J: }! M2 {. s4 W! c&_____62B9/ a* s8 @& ~" b* {& g2 x4 p
*_____63015 R  R6 |4 y8 b' v9 j/ J
(_____4659' h& p* e# F# E) \
)_____5C82
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