[原创文章] 关于国内某知名大学网站加密算法的研究 算法, 大学, 研究

柔肠寸断

原创作者：柔肠寸断 [3.A.S.T]  http://www.3ast.com.cm
) j0 d9 j- R- C+ y) O( a- [9 y原始出处：http://www.3ast.com.cm
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- B+ I2 {# h" _- H9 ?看不懂的直接绕过
+ ?4 u" p; n3 I( e3 l: n" C加密前为:hwy123456+ s- e, J/ c. B" Y
加密后为0F9C1C7A2EE76EBB5C1F4D7526CC4F883F4E
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3 r* j2 d! r) E7 b' R* r============================================
4 q2 A6 x- T) g0 F4 u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" D! u! Q1 q0 X$ }4 d5 C
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8 h" n! {4 @: j, i8 B" r# y
以下是RSA算法文件
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7 ^' z* n( Y1 r9 P$ H1 d! A文件名RSA.ASP! v$ j) R! \! E6 `0 b$ x$ P
===============================================
5 R, @6 H. Q4 \. U+ {) Q<% " l' l3 }! |8 _/ T! M4 [( H
Class clsRSA 1 M3 a+ M& o9 N" k; O& Y( r4 z) V! r
Public PrivateKey ( w* k5 e/ a7 ]( _1 X* U
Public PublicKey ! i1 b! Q9 N$ ]; a
Public Modulus
- c+ }; O2 \, q8 `- r9 d9 hPublic Function Crypt(pLngMessage, pLngKey)
+ t9 y* h; y4 X) [% g4 fOn Error Resume Next # C/ ~# i( V4 U3 G. n' ]# k0 g
Dim lLngMod " r* b/ c8 H- r& \0 M/ w2 @
Dim lLngResult
5 _7 x/ P1 I- V: J* |' ~) f: M+ D  R  NDim lLngIndex
) A. Y5 V5 _; S- c, fIf pLngKey Mod 2 = 0 Then
7 V0 b, {/ h; H! E9 v# }4 [6 z8 L, blLngResult = 1
" l5 E2 m* D5 ]+ FFor lLngIndex = 1 To pLngKey / 2 2 }& x4 ~! a9 m; r' o! v
lLngMod = (pLngMessage ^ 2) Mod Modulus
# R& b9 R) o* V: u' Mod may error on key generation , {- J9 T& o) O. _# R& p' N
lLngResult = (lLngMod * lLngResult) Mod Modulus
/ P" U1 Z, j: V; ?; \If Err Then Exit Function
: x) J- ?# Y: t! b1 \, MNext
7 `; h; q9 F2 b2 IElse 3 u2 C5 T/ a4 f, J+ x
lLngResult = pLngMessage
. R! C' p/ {, jFor lLngIndex = 1 To pLngKey / 2
* e6 L" O; o3 Q. S1 r# [; M. nlLngMod = (pLngMessage ^ 2) Mod Modulus ( M( C. f9 d0 _! z6 f
On Error Resume Next
) O. X5 H) {& Z3 P, T# r. L1 H' Mod may error on key generation
% ~$ D6 r2 r& ilLngResult = (lLngMod * lLngResult) Mod Modulus
$ b- E  j8 n0 D! J& X' FIf Err Then Exit Function
& Y+ N6 y0 e* z% C, B$ PNext
7 k( s( p% A; \& L' |  OEnd If
0 @2 {$ r6 _* S; K- Z) CCrypt = lLngResult
) R% A; U* g' tEnd Function
8 u( j" W# e  ]: s7 f$ p9 \0 U; ~3 S( K/ T0 `+ R; n
Public Function Encode(ByVal pStrMessage)
. ^! _1 }4 R3 JDim lLngIndex : i3 R8 A& X$ i( Y. D
Dim lLngMaxIndex 9 i) C) Q. g. K9 B
Dim lBytAscii 6 |6 W2 r/ j7 I# {+ U0 h
Dim lLngEncrypted
: u1 [( N. I8 f+ H1 {% e: k! m  b0 mlLngMaxIndex = Len(pStrMessage)
( g7 [# _6 c9 n8 W: `, zIf lLngMaxIndex = 0 Then Exit Function / `& H$ C2 m% E, L- {- o1 K0 h
For lLngIndex = 1 To lLngMaxIndex ' P) z* \& W5 H+ X7 F/ Q
lBytAscii = Asc(Mid(pStrMessage, lLngIndex, 1))
3 [& [, ?+ n- g# ?2 q7 jlLngEncrypted = Crypt(lBytAscii, PublicKey)   \2 K. W, ^5 ^# `+ q6 Z
Encode = Encode & NumberToHex(lLngEncrypted, 4) ; O. R! r8 W* H- G- T
Next 6 Q# z! u1 o3 q# B
End Function ) O* A# }) n. Q" W3 B
Public Function Decode(ByVal pStrMessage) / j1 }% \+ O) ~
Dim lBytAscii ' c6 g) f7 q! }6 B( ^* W
Dim lLngIndex ' o6 c+ Z; w" }2 F9 g+ s
Dim lLngMaxIndex
5 Y2 e+ x+ d* j/ I* s. zDim lLngEncryptedData & d! `4 v* x8 B1 m. I" O
Decode = ""
" u# K- j; H! M. m. jlLngMaxIndex = Len(pStrMessage) 4 P. l+ {/ \1 I; c
For lLngIndex = 1 To lLngMaxIndex Step 4
# E4 g2 }! \2 g' ]lLngEncryptedData = HexToNumber(Mid(pStrMessage, lLngIndex, 4)) - b8 H  g$ S* q( M
lBytAscii = Crypt(lLngEncryptedData, PrivateKey) - w6 Q& \  K9 }
Decode = Decode & Chr(lBytAscii) + R$ I; }1 c! ^
Next   }; Q: P4 I  W* V4 _" L2 v* f
End Function
- N) l# e/ S1 e& [) l* IPrivate Function NumberToHex(ByRef pLngNumber, ByRef pLngLength)
  o4 \- o. j" KNumberToHex = Right(String(pLngLength, "0") & Hex(pLngNumber), pLngLength) 8 d6 ?2 v& T) V6 t3 \
End Function
- w( U. r6 x$ w+ {* Y, LPrivate Function HexToNumber(ByRef pStrHex)
9 |8 ~# {' [' }% kHexToNumber = CLng("&h" & pStrHex)
8 E0 d/ e" z5 U& T# t; m7 Z  sEnd Function : \" ^7 m) [' P1 ?* t
End Class
8 w3 d  w6 I/ W/ W* f6 H& v& efunction Encryptstr(Message) - a3 Q5 N) A, x: M7 H1 z  `4 U& K
Dim LngKeyE
5 ]7 }* G, x$ y  jDim LngKeyD & d) c* v3 y9 R# F0 V, }
Dim LngKeyN + E) q- \: ]3 u
Dim StrMessage $ v/ H7 Q) H1 U4 M* H
Dim ObjRSA
, D) _. X, c2 j1 G  FLngKeyE = "32823"
' P& d9 z' B0 F5 v/ a5 `LngKeyD = "20643" / z2 g' b7 ]' L, p- [7 y
LngKeyN = "29893"
* K% o7 q( o9 q# d  ^! l  oStrMessage = Message
; |  u, Z; r% ], Y1 PSet ObjRSA = New clsRSA + c7 l& p/ D/ y. c. \
ObjRSA.PublicKey = LngKeyE $ }, ?9 W! X7 y$ B1 S) s
ObjRSA.Modulus = LngKeyN
3 E- C# _, u/ _0 ^. E  mEncryptstr = ObjRSA.Encode(StrMessage) 1 T( X0 ?: Y9 a1 ?9 i0 V0 f# R) h
Set ObjRSA = Nothing
# E" ]5 }) J2 p6 D) A3 bend function
  ^- f+ s; j: A* `. L' }Function Decryptstr(Message) ' e3 l' ^6 p+ ^. S- t
Dim LngKeyE ( c$ h1 R' m, A1 t8 J0 W- v
Dim LngKeyD & l; H. T! i# i0 s
Dim LngKeyN , S  n1 Y+ H/ b+ }0 [% i
Dim StrMessage ! t6 W, m* I2 {: [
Dim ObjRSA . S* ?  n* ^+ E; ~1 C# ^
LngKeyE = "32823" $ @) e, Z$ H* d3 f
LngKeyD = "20643"
+ T: C, X% T0 Y3 JLngKeyN = "29893"
  O- v% e5 Z' e% }8 R/ IStrMessage = Message , x& i0 N2 B7 k$ e4 Q2 r) G* P3 q
Set ObjRSA = New clsRSA
4 L' A7 f$ Y6 {* c; aObjRSA.PrivateKey =LngKeyD
0 K: Y% t( t5 f# M2 AObjRSA.Modulus=LngKeyN + r: N% ]9 l) r8 y# P3 R# ~8 Q
decryptstr=ObjRSA.Decode(StrMessage)
2 A* v+ y# m4 YSet ObjRSA = Nothing 6 j4 _  g9 G( \/ X; O+ \: l
end function + q0 V- l% M! U% e  D2 ^
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===============================================, U" q3 O8 n' c1 s
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还有一个用于测试这段代码的test.asp7 [+ \6 t0 U7 K1 |2 D# h
有兴趣的自己搭建个IIS测试下
+ d9 o% h# [: t4 p" u<!--#INCLUDE FILE="RSA.asp"--> 3 {2 c  a7 B) _
<%* o4 g/ j+ K6 o+ Q+ X9 g' w; i5 A
function Encryptstr(Message)
8 a8 W+ E+ Z8 ]1 [  _Dim LngKeyE 6 L, Q& t  L, q8 I* P7 I1 r
Dim LngKeyD $ r% K5 f; c' {
Dim LngKeyN
) Q0 J- b, J# J3 T! K  h/ t/ kDim StrMessage $ |* s' c+ z& j! f8 P5 j: }  O7 k3 p7 H! q
Dim ObjRSA
0 Q2 @# @$ y/ K8 vLngKeyE = "32823" . p* [5 Y- u! q/ X8 L  A
LngKeyD = "20643" : C$ u" t; t* f6 w
LngKeyN = "29893" 2 ?+ X( @6 N: m! Z
StrMessage = Message
- I6 ?: e: s$ }7 d, n  a* qSet ObjRSA = New clsRSA " W; n" l' `$ s) q9 F, T
ObjRSA.PublicKey = LngKeyE ! T* P7 _$ y4 h+ D6 u9 U
ObjRSA.Modulus = LngKeyN
# O7 u. r* S7 ]7 }) a$ ?Encryptstr = ObjRSA.Encode(StrMessage)
. \$ R- f; ~. z; C; ISet ObjRSA = Nothing
9 t8 A# h2 H1 l; G& xend function 9 G3 ?) S& }& {
function decryptstr(Message) 9 V0 |; B! S" O
Dim LngKeyE ' Q+ X4 o' }3 t1 \
Dim LngKeyD
4 ?5 o& N1 b! `1 m- E1 i# kDim LngKeyN
9 K; Y* U9 v$ I8 R$ a% z/ W9 FDim StrMessage 0 ~4 U9 t! C- E/ [
Dim ObjRSA 7 a8 w* j9 F, V! f0 `2 P
LngKeyE = "32823"
6 H; N$ @- [6 Y, J& XLngKeyD = "20643" . I+ }( ?$ y. n# Z
LngKeyN = "29893"
' \' a0 x/ P# Z) \$ [9 |; w* k0 zStrMessage = Message
8 G# u8 N: Z$ }0 ]Set ObjRSA = New clsRSA 7 s' [, W5 A! [# F7 Z
ObjRSA.PrivateKey =LngKeyD
- \* O, a% M/ m2 d( HObjRSA.Modulus=LngKeyN
& C# o1 j5 C4 x' {& @9 B: Q; O, ~( a5 idecryptstr=ObjRSA.Decode(StrMessage)
5 O) b- S( G2 ~% Y+ O+ GSet ObjRSA = Nothing
- |4 S+ k  z5 W4 [# Yend function ) p& Q3 w# j% {: ~* s
dim last,first
* h4 _- b0 @+ {: N, D6 vfirst="!@#$%^&*()"
& }/ S2 N; B& T6 `  RResponse.Write "加密前为:"&first 6 x" g8 O/ V' _
last=Encryptstr(first) 6 L& g3 `, t" h
Response.Write "加密后为"&last 1 F. j4 g* E$ G' l2 g; C
Response.Write "解密后为" &decryptstr(last)
- R+ z& _$ \7 _%> ==============================================: H/ s4 j% e" x# U: Y  x
剩下的就是字符的对照表了
: T: a# W" s) W. a===================字符集================
! }) w, Z  k1 Z5 u2 _% j  F1_____6EBB  a( X8 B4 e7 U7 w, Z
2_____5C1F
% B* O+ H  b# T5 }2 f3_____4D75
9 g8 Q! d& L( j; _' x) i! r9 d4_____26CC
" U  k9 k- B; q# ~& f5_____4F881 O$ F0 b! a4 b2 ~  y
6_____3F4E) w+ N- c+ v7 D& v/ Z- C
7_____0A9D% [* Z4 S- B- `+ H8 ^
8_____1A1C
' Y3 {, w* V/ w. ~3 u7 G6 B9_____6D20
+ E' u& l) |: s: ~1 [8 q9 g3 g2 p0_____1089
- b/ j8 b0 Z  V/ B( x( }% P& Na_____0F3E
% J3 H5 Q, X$ c- C! l3 f8 Vb_____3159
; W- _& Q! j5 E' w9 \7 o* `c_____3517
3 v  r6 }, ]. N( G. x+ [, q/ Z' hd_____419C
. T: c: Q# I# T, J. ]e_____615C2 b$ l, Y# b; A, O/ I
f_____556F
! J" B# c& e+ R6 N$ Y# ~( w' Ig_____2B7F( `' F+ n5 Q( t3 k' B# D' n; ?
h_____0F9C+ H! `8 @  h' N5 Y$ N. ~- q
i_____00FA9 a) }& r5 o8 b( `4 \
j_____5A50
0 h( N: _# ~4 C. Gk_____2850
% C! ~4 g* ?/ ^9 O/ ?2 }l_____3E7B
* `$ K0 x8 F  U! f1 r! {; V! Cm_____71C5" S  }: W' \  O: B1 ^! O3 v  Z. A
n_____1FC8* V7 V- |: k- b/ n
o_____74C1
+ k' G7 Y( x8 w9 \$ [- ^$ X- ep_____5FB8
# y0 ?: |1 n! ^- f+ gq_____6085/ S: d$ F0 K( `. c# W
r_____3AC4
% _5 Q8 b" D- T$ ?& ]s_____2F500 H1 l4 Q! D0 f& B
t_____36F8
2 F5 _5 c  P* Z/ vu_____7010# z$ r/ U" \- [" O' w
v_____0B42! v8 `8 N; j- T* j' V( K
w_____1C7A
8 }: W( V) J+ j, k  I5 }- b0 g, N' mx_____16F8
! T. S( Z$ Q/ k) I6 M6 l8 y) fy_____2EE7  o) a& G1 ^- R2 O* y9 ~
z_____5CF3
) L, P+ @- c" n/ b9 S0 _% k!_____6233
) E$ ~* n# u, h& y; ^- G* F+ [@_____3A452 y6 \+ w7 ?6 ]" u% O. Q, G. ]6 f
#_____22910 e( c0 n' z6 W7 N1 W- ^
$_____5D5C
" o: k7 k3 B, l%_____09B9# q$ x( [+ d6 @7 G/ E
^_____43EA
2 B. d/ o/ e/ b7 D! l6 q- c0 G&_____62B9" ~9 Y  I: Z, O2 e) `- \  ^, W
*_____63016 p3 d0 \; ]& e! g( Y1 b6 v
(_____4659
( b" G! _. h% o3 m/ ^)_____5C82

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