[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" b1 ^9 @$ B: z  k  U, o" O7 e0 o
原始出处：http://www.3ast.com.cm
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7 z; o' [/ F9 M9 e: Y) k看不懂的直接绕过% g* J9 h, h+ ?& G! }
加密前为:hwy1234564 j7 o/ q% w& e* R( P
加密后为0F9C1C7A2EE76EBB5C1F4D7526CC4F883F4E
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" M# V3 q: d) c1 |============================================
! n2 r6 a5 {$ h* G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 b8 d0 d7 Q/ F6 h) I! j) O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; n3 F  Q8 N  x: Q
以下是RSA算法文件' i: ]4 h/ S' k9 X

$ y: W1 u1 Z; X9 s+ A' h3 u文件名RSA.ASP
/ X4 F. e1 P0 `4 q7 j===============================================" Q3 E" G1 R# B( H8 @0 q
<% * x9 x. }" r0 X: J2 }6 L/ G+ T# m7 {
Class clsRSA
$ G: [0 b2 V/ A! X$ D+ s9 sPublic PrivateKey
! Y- d0 [- H1 DPublic PublicKey
  H  [' \% r; G2 y7 u+ x- S& Y% c5 DPublic Modulus ! I3 j7 j& H* `' c
Public Function Crypt(pLngMessage, pLngKey) & b2 |$ u4 y' I, V, V" ?- |
On Error Resume Next ' f. K8 I4 G* ^& x; y
Dim lLngMod
) `9 m7 n& T+ G9 FDim lLngResult ' _! g; {9 H- Z% q" D/ d
Dim lLngIndex   ^+ ~3 c& |+ @# r7 F" Z" {0 k
If pLngKey Mod 2 = 0 Then ; \2 k/ A6 A' N
lLngResult = 1 7 _* p, g0 D+ L! l$ p; [
For lLngIndex = 1 To pLngKey / 2 6 c/ y. a, D1 }% a
lLngMod = (pLngMessage ^ 2) Mod Modulus 0 m* Q+ `% G* R$ U4 d
' Mod may error on key generation . y7 F" d- c# e
lLngResult = (lLngMod * lLngResult) Mod Modulus
( E/ H- ]& ^: ]8 s' XIf Err Then Exit Function
% P- c! [* v+ U- tNext
/ y* N  Z7 h& j& PElse 0 z# K  y) _0 S6 ^# R
lLngResult = pLngMessage + Y, r3 N7 z0 J  w
For lLngIndex = 1 To pLngKey / 2 & z5 s. F4 Q" ~2 T* G! v& Q5 }7 j4 H
lLngMod = (pLngMessage ^ 2) Mod Modulus 0 q9 Y% o% B; D" c) \& ]) ^
On Error Resume Next ; d8 \: t; T- J( H! ?% H3 a8 [* F. i
' Mod may error on key generation
/ Q6 n3 f+ Q' y# u, KlLngResult = (lLngMod * lLngResult) Mod Modulus
& c" \# o+ U+ f! G2 ]3 j4 dIf Err Then Exit Function
% O+ W2 k! M4 N6 S- x0 \Next   F# J1 C# m) O, `  a
End If
9 u8 [' H4 `8 W( d6 v# c5 JCrypt = lLngResult
/ N# A/ X6 y9 @  H. i( F$ j) U; oEnd Function
$ j% Y- j: p8 d, s
+ Y& l8 i0 j) t9 n8 L5 [Public Function Encode(ByVal pStrMessage) 2 V& z: l4 }! `
Dim lLngIndex
) d+ s& }2 [  ~Dim lLngMaxIndex
/ p) y7 `3 |9 K$ jDim lBytAscii $ E1 @' J; d. R, o
Dim lLngEncrypted
" I* J6 U5 y7 `2 L4 c8 R0 p3 Q* ClLngMaxIndex = Len(pStrMessage) 5 f+ t. Y5 ]3 v4 r
If lLngMaxIndex = 0 Then Exit Function 1 z2 a: O+ w5 F* U" X& ^
For lLngIndex = 1 To lLngMaxIndex 1 q9 M4 V- j1 K7 T. X
lBytAscii = Asc(Mid(pStrMessage, lLngIndex, 1))
+ n) A5 M: A) }& s4 b2 f) c6 b7 n) wlLngEncrypted = Crypt(lBytAscii, PublicKey) ( d- T* a! Y( K7 j6 N
Encode = Encode & NumberToHex(lLngEncrypted, 4)
& e9 Y* S9 U' V7 @8 A- bNext
' M2 @; x. K" B: U; p8 ~- g1 z% wEnd Function
$ g3 f: c/ L$ w( [Public Function Decode(ByVal pStrMessage) / M8 `% ~  D  O4 n$ Y
Dim lBytAscii 2 N7 c# T0 s* |$ k7 P) z7 e* o7 a
Dim lLngIndex
; ~: z/ `4 A1 O; g; `+ ?$ m7 j0 S/ q/ o% VDim lLngMaxIndex & `. H3 D, G/ a9 v' H0 Z
Dim lLngEncryptedData ' D( E, a* o- Q
Decode = ""
2 a' S& G" W/ b6 I  h' \& PlLngMaxIndex = Len(pStrMessage) % c0 t" k" d. l& E
For lLngIndex = 1 To lLngMaxIndex Step 4 ; }9 r) r. p* r: P. Q' j
lLngEncryptedData = HexToNumber(Mid(pStrMessage, lLngIndex, 4))
/ z  V- |; w3 _& x  t+ F9 Z: MlBytAscii = Crypt(lLngEncryptedData, PrivateKey)
8 m8 a% W; Z! Q- P. m8 wDecode = Decode & Chr(lBytAscii) " w0 t3 N8 M0 g
Next
% X; T7 s2 c* I2 v9 I! j  qEnd Function + G- n! g% A- g
Private Function NumberToHex(ByRef pLngNumber, ByRef pLngLength)
. i* r# T# w0 k, b5 n; zNumberToHex = Right(String(pLngLength, "0") & Hex(pLngNumber), pLngLength)
" p1 n1 {# u2 ~9 Y# VEnd Function
4 ]. D( X. z& e+ {Private Function HexToNumber(ByRef pStrHex) 8 @9 S, P8 R; R& X- e: X
HexToNumber = CLng("&h" & pStrHex) 0 i- J/ M0 n, ~
End Function " b6 @# D# M4 k
End Class " v  {( O: u* \3 S0 E& e
function Encryptstr(Message) $ h2 s8 y) E/ S# n* S' |
Dim LngKeyE
/ f5 g$ V0 Q7 m4 @Dim LngKeyD ; `* j0 b/ u- b$ }1 }
Dim LngKeyN
8 o: K) x; z  G7 q: s( L3 }" EDim StrMessage
1 i9 _" F6 X/ D+ S1 ^- T) PDim ObjRSA " F4 j* n' x+ ~" O: K  c# w9 Z
LngKeyE = "32823"
" [5 p6 Q! b2 u; |$ F. U- ^9 k" K: hLngKeyD = "20643" $ j; h8 o, o# T0 }; m( g9 E
LngKeyN = "29893"
' J) A2 [" k/ p1 O7 VStrMessage = Message
! c  x9 m' _' I1 q# Z' \3 [% MSet ObjRSA = New clsRSA $ q! Z& g! ~) s' [! Y( t% M8 a8 H# p) Y
ObjRSA.PublicKey = LngKeyE 4 r3 I8 A+ e1 c6 w- m! t
ObjRSA.Modulus = LngKeyN $ z' X( W8 ?( E! w
Encryptstr = ObjRSA.Encode(StrMessage)
" p( C/ m; k2 e1 bSet ObjRSA = Nothing 4 i# U/ g4 p6 ^) H! C, ~
end function
2 I- {" n7 q' F% T% B% OFunction Decryptstr(Message) ! z% n0 h. ]' `2 Q
Dim LngKeyE
- b9 Z4 q" Y* bDim LngKeyD
6 C  [: @& Q3 n  h* G( J! @Dim LngKeyN
2 E3 `2 s5 t! R1 Z( P. ?8 a# dDim StrMessage
3 N8 y( Y0 u8 B) [$ ^Dim ObjRSA ; N4 R: V  b1 i+ g  w3 ^
LngKeyE = "32823"
: ~4 r1 U* ?* r: v& bLngKeyD = "20643" 9 q& `& }$ k) M# Q/ o2 M7 D! ^" ^
LngKeyN = "29893"
2 Q. _: H/ q% B9 d/ s" [. H; k5 tStrMessage = Message ) m1 m0 |5 u' G; B
Set ObjRSA = New clsRSA ' N/ g9 Y" [7 M0 |
ObjRSA.PrivateKey =LngKeyD
+ l: U0 H+ ~2 Y- n! JObjRSA.Modulus=LngKeyN 1 M5 m7 F) @1 M* N" \" c! v
decryptstr=ObjRSA.Decode(StrMessage)
5 g8 n6 m6 A5 I8 W+ lSet ObjRSA = Nothing
7 z& Y- d% J$ Uend function , M; j0 x9 T' }+ G
%>; m) u9 Y; S, B8 B% o9 Z
===============================================. O/ {! y/ {+ W

7 O# m- h7 y% K还有一个用于测试这段代码的test.asp
+ y) Z' I2 \  I: ~; o; U: |  u有兴趣的自己搭建个IIS测试下3 }. F4 j* g7 z; K! S
<!--#INCLUDE FILE="RSA.asp"--> - ~5 u4 Z% d. I& T
<%8 m' @- ?3 q* ~3 ~8 O
function Encryptstr(Message) ( K' v6 k' v$ S6 c7 g
Dim LngKeyE
0 j! Q$ {9 N7 ~) DDim LngKeyD
6 h+ A3 l; v; P9 {- _Dim LngKeyN 7 ~9 c) w2 d- u, U9 q1 q7 w  Y3 {0 |7 Q
Dim StrMessage
' ], y& r! T& \- C$ g4 w& `- tDim ObjRSA
  k  B4 D2 [$ `- xLngKeyE = "32823" ' @; ]: o! u' h, b; a
LngKeyD = "20643" - D! u, Q1 g  X: c
LngKeyN = "29893" 4 a+ w- o. S  h* K& t
StrMessage = Message % n2 M: y' J% }9 x. @4 b
Set ObjRSA = New clsRSA
2 Y9 E; h' P% X* x- O1 UObjRSA.PublicKey = LngKeyE 9 @2 K! c! G( P, e  G" S7 j$ Q; O7 [
ObjRSA.Modulus = LngKeyN 7 x+ K" Z2 ]6 E9 U( u
Encryptstr = ObjRSA.Encode(StrMessage) # [2 X9 X4 z' E: y) J9 O
Set ObjRSA = Nothing
& E' Q( Y0 {! ~- N- R  s, c! y8 }, fend function - o8 S: L: P5 \+ T$ u3 G) f! S4 e
function decryptstr(Message) 0 {8 |9 v" n/ n+ o" v1 B: b) Q
Dim LngKeyE
/ b1 |5 W: _# }Dim LngKeyD
6 J6 c# j, N  ^7 F8 Y& `3 IDim LngKeyN ( j7 Y2 g  R" @" v% O
Dim StrMessage 2 E/ t" H) }% \  g
Dim ObjRSA + a7 a4 I8 A: ]5 P0 F4 M
LngKeyE = "32823" 8 }% \8 Z) A( P! V6 P
LngKeyD = "20643" ' N1 {' Q- k6 ^+ X5 W$ ~5 n
LngKeyN = "29893"
( c, U3 Z- ~" w# a! n& ZStrMessage = Message   U7 ^  r! q+ f2 V
Set ObjRSA = New clsRSA
* q& a( y  y! P8 L; ?6 h4 xObjRSA.PrivateKey =LngKeyD
4 E& ~& I* O) W  {! QObjRSA.Modulus=LngKeyN 9 _8 L' d5 `4 H$ k* l3 S
decryptstr=ObjRSA.Decode(StrMessage) 2 H! _& K" Q7 d, t2 }* i
Set ObjRSA = Nothing + |( `8 H' F- i- h  |5 \; ?
end function
: F, @  x( p6 T& f" Wdim last,first
0 I: W/ P5 c& [' ~2 Vfirst="!@#$%^&*()" # o+ W; e0 @0 c" `3 m6 b! p- o
Response.Write "加密前为:"&first
* g* ]; d( n- ]2 c( K; S1 Z8 S+ ^last=Encryptstr(first)
" L% k7 v6 ?) R  H7 t- N1 uResponse.Write "加密后为"&last # ~$ s& Z6 S1 i0 z3 d7 }9 J
Response.Write "解密后为" &decryptstr(last) $ d, l1 C! {8 e- d: `; G
%> ==============================================+ k+ Z3 _# k" s) B
剩下的就是字符的对照表了
0 ]! ~  _/ ^$ x: \, Z===================字符集================1 I3 e2 S4 ~# |3 f7 z: X
1_____6EBB+ N7 z6 q/ v4 D4 k5 f3 X: h! |6 |
2_____5C1F
# [2 u# ]5 U( a* h. ~2 r3_____4D75! i  w& y6 D# T5 Q+ L% P
4_____26CC
2 C  \5 K2 q9 q" Y+ x5_____4F88
) ]5 O, j( i0 Z. w6_____3F4E
; D5 o# w* J, k& U( L1 \0 _9 _7_____0A9D% \4 v# C3 h5 y- o1 F. Z
8_____1A1C  B% k2 \/ m* m/ G3 x, q
9_____6D200 m7 ~$ T! h0 o
0_____1089# m( H- b" g! W4 Z3 Y
a_____0F3E4 V* ?, s. p( z! P* h
b_____3159
% c8 L! m: h+ C# u4 D# U/ ~c_____35179 g9 N5 b* F/ |6 A5 L
d_____419C
& E5 D- D) n: `" q) t8 }* te_____615C3 G. K. l" G! p9 I
f_____556F
5 b  E; m8 W2 X. Z$ I2 {g_____2B7F
+ h6 f/ j3 [9 A3 R/ C9 m! Ph_____0F9C
, u. U* l$ V) E! o+ \% z' G% p5 Ti_____00FA
0 S2 p' [8 }, _j_____5A50& f, j  c/ M* W9 G, i7 X8 r' n
k_____2850/ B- `( ^! {* [0 e
l_____3E7B
- Y- x% t+ ]( G. X: {% e* c# `m_____71C5
* M; C4 \: E' N- f) s( }n_____1FC8
  p& ]: f! b2 u- v  F! So_____74C1
  X& f' V) {, r! \4 i# fp_____5FB8
& r7 K  D0 q9 y8 s6 E$ Tq_____60850 R! Y! l( j) h( F
r_____3AC4
5 Z& W" [9 F. W: T2 L  J( @( n; }9 ~1 hs_____2F500 T$ ]: c0 B7 p( ]2 K
t_____36F8, j! _* I) L# w. D! f8 P* M
u_____7010
! z( C( L+ F+ bv_____0B42. {' E$ P* X# G$ ~
w_____1C7A1 |6 |, y2 u0 l3 c2 u
x_____16F8
7 h8 h# [6 Z6 A; g+ s3 ?y_____2EE7
0 w5 b: S0 G0 Z; o7 s$ m* n0 pz_____5CF3. t/ J$ i+ y5 f4 F$ c) Y  q! u; g
!_____6233
+ z  ]7 M8 V' H+ C@_____3A45- D/ T/ H2 t0 f& f2 ?) d& g& c* W
#_____2291
7 v5 J" O* x1 J" j: C: j! g$_____5D5C
- u) K! P: o) ^3 O# ~; R%_____09B9( S, \/ ^  R; S" G8 t
^_____43EA
4 r! s, u. O* J; P&_____62B9$ Z: a) M5 w# Z, W
*_____6301+ i1 ^* p3 A. C& w* C0 t
(_____4659% U9 u& c* `  W7 L# p; |
)_____5C82

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