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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
1 _4 X0 ~4 ?- C$ ?5 D原始出处:http://www.3ast.com.cm
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看不懂的直接绕过
, |0 f% y0 Q- z& u) }加密前为:hwy1234563 E- q3 ~# v: A$ e
加密后为0F9C1C7A2EE76EBB5C1F4D7526CC4F883F4E
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3 u* \, T! O/ M  D8 b: W  ?: q============================================
$ n' Q& ?- {  Z+ m. 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
( ?3 K( a% A, K, B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
* t( z' n( I: g以下是RSA算法文件
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文件名RSA.ASP4 e  w6 X  H- k6 P  ^$ T
===============================================% ?) Y  X' h# O& M6 \; a
<%
5 f$ O0 T3 H/ ^& G$ `) lClass clsRSA
& A* d1 ^6 }: NPublic PrivateKey
, X- b% S2 k5 z, g' q1 f9 RPublic PublicKey 9 _% g1 t$ }$ a( i, Y- i* d& M0 Z
Public Modulus
8 W+ n2 O; F1 C% ^2 h; X9 FPublic Function Crypt(pLngMessage, pLngKey) " z' T( A( [: f& G, o4 c' d2 v2 I
On Error Resume Next # H3 t. V" U5 p0 m
Dim lLngMod 7 a5 P9 \: G5 e) T3 a4 d5 l0 a: |
Dim lLngResult , ?4 O$ M7 J) }
Dim lLngIndex 7 A  L# c: @' m  I
If pLngKey Mod 2 = 0 Then
. x+ @8 Y. s7 C* g* I7 AlLngResult = 1
, V; {1 q1 [$ |For lLngIndex = 1 To pLngKey / 2
2 N# P$ z9 V, U$ |! O8 r# nlLngMod = (pLngMessage ^ 2) Mod Modulus
3 J7 G1 }; H( M; u# v0 Z9 Q' Mod may error on key generation 8 L$ q5 c4 n: g' m9 n
lLngResult = (lLngMod * lLngResult) Mod Modulus ; i( R8 I$ D" G% A1 z5 d
If Err Then Exit Function
' q5 g$ r& Z- T' v; K6 yNext
* i+ A( O7 X! g1 I( xElse
. U7 y# k: t7 o6 G" Y4 ElLngResult = pLngMessage + T) i' ]/ N' K: e  O; N. a
For lLngIndex = 1 To pLngKey / 2 " N4 j. B) u/ d, }5 d
lLngMod = (pLngMessage ^ 2) Mod Modulus
0 Z. @8 ~6 o2 L( G8 JOn Error Resume Next
% g; h9 e2 o' }9 i* m! l% v% R" G; i' Mod may error on key generation
* q; C# x: Q# ?, }  }; D1 w$ JlLngResult = (lLngMod * lLngResult) Mod Modulus
1 I+ z: j7 t0 B9 c7 p* U. D% IIf Err Then Exit Function # H& d: C9 l" h/ k
Next
& d3 J/ F5 s" q" y3 S8 I; _End If 5 G4 q" b; V. f0 T" |; p1 ^
Crypt = lLngResult % X! L8 w5 D0 [1 R& W" F
End Function, d8 w! P/ l! ]! F! ]) |& E. n. A, Y

+ S; h+ t9 |, e& T: s4 lPublic Function Encode(ByVal pStrMessage)
9 a: [+ O7 A: t; M; jDim lLngIndex / [6 i2 E- l8 J; n; v& y  Q- M
Dim lLngMaxIndex
  n: k: r, j$ f- VDim lBytAscii # n* Z# r8 L/ C; B+ k2 @& e$ F
Dim lLngEncrypted
- o5 b  b; o6 r7 glLngMaxIndex = Len(pStrMessage) : L0 z- G$ b4 ?! C  h! v/ D% N$ j
If lLngMaxIndex = 0 Then Exit Function
: g0 o' H- O) {8 I* F0 O+ EFor lLngIndex = 1 To lLngMaxIndex
+ {7 m  S' b  Y# klBytAscii = Asc(Mid(pStrMessage, lLngIndex, 1)) 6 |% y2 a8 z7 {( L" Q" F' D' D7 u
lLngEncrypted = Crypt(lBytAscii, PublicKey)
9 f1 m8 S4 C' T4 p: W# j  U. \' MEncode = Encode & NumberToHex(lLngEncrypted, 4)
, {. m7 g& A$ c+ ZNext
3 A( _$ q6 u& Q5 N+ @! \; uEnd Function 3 P2 ?2 I8 {3 ^% ?. f% j; Z
Public Function Decode(ByVal pStrMessage)
5 I& Y$ V! t. B4 Q- N4 }Dim lBytAscii ; |. M0 q; Y8 M7 a( |9 P
Dim lLngIndex
! g2 G, C/ x- i3 XDim lLngMaxIndex ' v, }% w$ z5 U
Dim lLngEncryptedData
6 g9 }: X4 [/ t8 v: x; N0 DDecode = "" - c( {1 ]) u* S" i
lLngMaxIndex = Len(pStrMessage)
' L3 C8 j! S( c6 \+ aFor lLngIndex = 1 To lLngMaxIndex Step 4 % Z) D' Y0 g* K! Q/ ~. D
lLngEncryptedData = HexToNumber(Mid(pStrMessage, lLngIndex, 4)) + e( X5 E/ P0 d) K9 U( S
lBytAscii = Crypt(lLngEncryptedData, PrivateKey)
/ W* {5 l' T6 G! S& C1 ]. SDecode = Decode & Chr(lBytAscii) ; J/ C! I( |$ d' P3 b
Next
' T/ E; Q& g. ~+ T  w8 m; k) ]& x- TEnd Function
$ `* b6 o2 B( \: l% J/ mPrivate Function NumberToHex(ByRef pLngNumber, ByRef pLngLength)
1 {  u( V9 c2 eNumberToHex = Right(String(pLngLength, "0") & Hex(pLngNumber), pLngLength)
$ _4 r) n; f/ W$ `, }0 REnd Function
+ {# L1 J; x& U* |: Z4 R, @Private Function HexToNumber(ByRef pStrHex) 3 {0 p6 r2 V$ B& k1 J, X
HexToNumber = CLng("&h" & pStrHex)
; G2 I0 f- C( x! ^3 K) B) rEnd Function
. X+ P# q1 E$ ]0 I8 kEnd Class
, F" T4 G$ n3 _9 _  c, _/ Pfunction Encryptstr(Message)   g/ Q  i0 }2 O) t0 o" O
Dim LngKeyE
7 i% H9 o" A. I2 EDim LngKeyD
# }7 J, m* {3 iDim LngKeyN
$ n/ s5 H9 J( NDim StrMessage ( _/ X1 y5 P( y/ ]8 \
Dim ObjRSA
! e, U/ M$ h0 |- f" fLngKeyE = "32823"
+ q/ n# Y" ^4 t4 V* j$ pLngKeyD = "20643"
) Z' i5 ~0 r9 h6 A* V: CLngKeyN = "29893"
  S0 ^$ Z0 p- Y) c: y* ~StrMessage = Message
% R& O- b1 _+ U1 O, P+ _Set ObjRSA = New clsRSA 7 f! e% V& x4 Q/ g, Q6 y6 g1 ]) V' A
ObjRSA.PublicKey = LngKeyE * G4 \. [. s- X! f- P9 x7 h; @
ObjRSA.Modulus = LngKeyN
  x' Z8 }1 G6 n, iEncryptstr = ObjRSA.Encode(StrMessage)
/ {) A( O& Z  J  U$ vSet ObjRSA = Nothing
% G0 w- ]* c' L4 p( cend function
" ~( s$ U+ J8 l- A8 kFunction Decryptstr(Message)
2 P. @0 S4 h. l8 `. yDim LngKeyE
( e% p$ M/ x/ t. pDim LngKeyD ; Y6 z/ K4 |$ \
Dim LngKeyN 9 C" G7 L4 M2 j1 Q# U  d
Dim StrMessage
: F& |% A9 j1 s) ]7 |Dim ObjRSA $ w) g) ?  A3 q$ x
LngKeyE = "32823"
/ W; `1 @) D, g7 f9 OLngKeyD = "20643" & E) e! j' S0 R& ^" x6 L( `$ t
LngKeyN = "29893" 6 V8 o' g( \# F
StrMessage = Message
  y: O. W( X# J* N4 u% rSet ObjRSA = New clsRSA
* O" N* \  }+ ?3 l$ f  S8 L! {ObjRSA.PrivateKey =LngKeyD
5 |" C& C, f0 r: q6 d8 {8 m5 u: i1 s. a3 ^9 eObjRSA.Modulus=LngKeyN
9 ]  |) E1 `" Y! }3 |decryptstr=ObjRSA.Decode(StrMessage)
; e6 @; _. |$ D% z/ F- S/ t& mSet ObjRSA = Nothing
  D* o/ K. R; aend function 6 A9 w4 c5 l6 g; y/ l# B6 v
%>: V8 }% D9 {. B7 u7 d1 p1 A
===============================================
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还有一个用于测试这段代码的test.asp
7 M% k" a0 t+ u0 A( N' ]- Z8 R有兴趣的自己搭建个IIS测试下
+ [( G5 V' e7 a6 M- ~<!--#INCLUDE FILE="RSA.asp"--> # O* ~' X7 P; H9 b7 f# W) T- A
<%* o4 l9 f: u& y, M/ x( B1 A& ^! {
function Encryptstr(Message)   r$ s6 _1 Y$ ]9 C
Dim LngKeyE 6 W1 R1 `0 T8 b) U7 d: a0 F
Dim LngKeyD
4 f' w) t# I, f3 |, ODim LngKeyN
2 y: ]; l% d" T* J' V* q3 WDim StrMessage
! X; @/ v0 s% G9 N% }Dim ObjRSA
  R$ l- B  Z2 c! U7 tLngKeyE = "32823" 0 c0 }, C$ g& j% T
LngKeyD = "20643" # N# O# i5 h' a8 U
LngKeyN = "29893" 3 h8 ]" T! Y4 e! M/ x
StrMessage = Message
+ r0 Q7 Q7 P( w6 ~1 QSet ObjRSA = New clsRSA
4 a7 P; r4 y8 SObjRSA.PublicKey = LngKeyE % U9 i2 q1 x/ u6 A2 Z8 n  k1 x5 B
ObjRSA.Modulus = LngKeyN 8 G2 M8 v1 F9 J& h
Encryptstr = ObjRSA.Encode(StrMessage) ( g' X- L$ E; S0 A. n& P
Set ObjRSA = Nothing ; N- ?. v8 N  l
end function
" K' `5 P2 e7 Q4 C0 X, y, Rfunction decryptstr(Message)
0 r3 g: x4 C6 n+ \$ v9 \6 K/ sDim LngKeyE
6 p6 T% ?/ E; ~$ S6 gDim LngKeyD 4 ]! E, O$ O/ _/ w& e% d; _( ?
Dim LngKeyN
6 O5 B. x, _9 t0 V, y: zDim StrMessage " D( g* X3 E" \' h  S9 }2 ]
Dim ObjRSA - @& @' l# R5 ^+ S0 C4 H$ r' t  o
LngKeyE = "32823"
8 W* |, R% Z7 |  SLngKeyD = "20643" ! W+ ?' N+ P6 O6 x# Q% U! H
LngKeyN = "29893"
0 l* i5 ^! ~6 S  A7 P0 RStrMessage = Message
! o% T# M. ?0 X% y6 LSet ObjRSA = New clsRSA
" h: Z( c( n% Z' j7 O  J& aObjRSA.PrivateKey =LngKeyD   _9 s/ o5 j4 ~1 k
ObjRSA.Modulus=LngKeyN 5 Q" V) k+ ]4 e# I5 E! @3 x" G
decryptstr=ObjRSA.Decode(StrMessage) # A; ?) V4 M$ [. r$ l/ U0 F0 W' I: ]
Set ObjRSA = Nothing 8 _8 v3 g! R3 ^% M4 X9 k& h/ D
end function
) ]: b0 Z6 o+ I9 `! \dim last,first
  B& x! J! d* o! V- u* B1 \first="!@#$%^&*()"
3 z+ j0 w4 ^9 \% Q" I, JResponse.Write "加密前为:"&first " k! E9 [5 }3 e1 B& O
last=Encryptstr(first) * Z1 E. d; Z$ P; Z: l6 j
Response.Write "加密后为"&last ; S$ k  u3 v9 m1 J
Response.Write "解密后为" &decryptstr(last)
6 j- f$ o" n! C& Y) J: U  }1 A%> ==============================================
. A) r: U$ K4 v剩下的就是字符的对照表了& t+ ?$ g' \* A9 F6 @' W
===================字符集================) N0 ^) D% O8 L9 c' z8 |, T- Q! c9 t7 V
1_____6EBB
: @* n8 y' K6 ?4 Z; g2_____5C1F
  O4 h& I2 h+ _0 B% b& |3_____4D75
; t7 s( x. T) }7 K( g6 g4_____26CC7 j0 a. {0 V( N2 A! g
5_____4F885 L7 `8 W1 M$ E
6_____3F4E
3 ]; R: k2 j+ {1 K7 c( s. y* `8 T3 H7_____0A9D4 r% V2 i9 D% L7 {, p" x, z
8_____1A1C
5 p. e7 `, _0 P, a9_____6D20  _/ H; }# g+ W9 \
0_____1089
) j* }* B3 `, q1 @7 ua_____0F3E5 [7 [/ i. ?/ S$ F( Q
b_____31591 V" y2 o/ I6 x) Q" `# w4 x
c_____3517
* W: v9 a( N. M* ]d_____419C
2 B3 Z5 j% `% y+ d4 _! B' he_____615C
9 V0 y: e! }2 @5 Nf_____556F, h" ^% P7 f7 Y2 Y1 |9 W3 q
g_____2B7F( q' Q$ r; Z) b( \# e, l- ^( g1 t
h_____0F9C
8 }  {7 N3 Y) i+ ~+ Vi_____00FA
9 d. e( c9 L2 ?( d- `* [j_____5A50
7 D6 K0 O# J# U9 bk_____2850
+ |" F" A. @6 S% r( ll_____3E7B/ H' \( f  F" k2 I
m_____71C5  I6 Z+ n. k+ z% ^# f0 A) f
n_____1FC8- Y3 x; n& u9 c8 j1 g
o_____74C1
) ]1 s# C4 C" G" {9 ]5 ]& a- A: rp_____5FB8# \( q+ M* C# f( \. |# L
q_____6085
) o8 B. L' O4 D0 `1 E  e" or_____3AC4
- Q$ D- l( a) \& S7 b2 l3 As_____2F503 n9 m- y4 c$ N1 u! e
t_____36F8
7 S% D" U% c6 e4 uu_____7010, q! i' r3 h# `& V4 l
v_____0B42' D6 s% c5 o5 B+ ^* W) F. o  X$ f! e
w_____1C7A
& f9 h+ E+ u) U, Q: J# D( I" Ax_____16F8
# W  W! L: O5 s' B) x0 Ny_____2EE7
1 k' Q; {/ ^% \z_____5CF35 ]- u8 O% k8 X0 T- G9 L4 k$ E
!_____6233
) d; C1 t2 ~2 v@_____3A45
7 {8 f9 _+ C$ w  u#_____2291  a. j" m8 C: w. Z* p4 U
$_____5D5C0 H0 |. L1 |. S5 g# n
%_____09B96 B( {; n! o. c2 H3 ~7 H
^_____43EA
, t; X8 ]9 L+ u&_____62B9" {: r; r8 ?4 |" u( i. N
*_____6301, r/ c, t$ J! y+ d
(_____4659! \+ s$ a+ o4 q5 S) y
)_____5C82
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