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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: P) f$ C: w& f# `' ^) _& Z! r
原始出处:http://www.3ast.com.cm5 y0 u( d+ K& j

% x* c( e4 U% ?! g2 G. V& O" M: T看不懂的直接绕过
2 ~8 H, W4 o' E! I- P5 @加密前为:hwy123456
/ V: z$ e7 ?8 E加密后为0F9C1C7A2EE76EBB5C1F4D7526CC4F883F4E
6 q* N+ v+ k* i) p/ {& y
" S; \; c4 |: {/ s9 ~============================================, D4 h+ x0 [- ]1 K, X- {6 w
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
8 U& k  ?2 j* j: X, y! D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
$ V$ j9 k, ]" i* S( @8 k: J以下是RSA算法文件4 `8 D* `4 @* a& y8 e4 \

/ l, L! @, M; I# L文件名RSA.ASP
- O$ }* \: K0 n. G' p$ I===============================================+ c7 _' O3 u+ m$ |' P( q
<% $ U# v! L4 N3 f; h# |1 l( s! p
Class clsRSA ( s. C2 Q' ]& R% J5 o+ f+ M
Public PrivateKey
# C( G0 c: ~2 a) W% D) X! Q' |Public PublicKey $ I* n' f. t1 R6 ^' ]( l
Public Modulus
. a5 R# U5 Y6 I. M8 g8 |; HPublic Function Crypt(pLngMessage, pLngKey)
5 N/ ~# c! U3 BOn Error Resume Next
" u+ K6 q; F' ?0 R! }4 g- Z% Y/ L+ |Dim lLngMod
: L5 h( P: N5 s) h& CDim lLngResult   G: U& l, q; w, z& n6 n# I: j
Dim lLngIndex ( d- K! g' Y. w' g# l7 }  I
If pLngKey Mod 2 = 0 Then : P! g$ Y5 p: ]( n
lLngResult = 1 8 E' T' D* p5 _  S! I0 p/ R. @, _7 _! ~+ j
For lLngIndex = 1 To pLngKey / 2
0 l: n! {1 r' h0 a1 K1 U" M. flLngMod = (pLngMessage ^ 2) Mod Modulus
' k, [1 t9 G) |+ h' Mod may error on key generation
- m$ I0 u, V8 h, H5 PlLngResult = (lLngMod * lLngResult) Mod Modulus   b1 m  A0 b" t- ?
If Err Then Exit Function : o3 O- X5 p+ O
Next
# A( W* b: f/ h& c4 M" V- W) jElse
& P- y/ A+ [- g7 D. HlLngResult = pLngMessage
2 B1 q6 m6 D# aFor lLngIndex = 1 To pLngKey / 2 4 \$ l" }, j+ ~1 G  ?  w. B
lLngMod = (pLngMessage ^ 2) Mod Modulus - n- t! v8 ?3 [! `1 l( n
On Error Resume Next
: I7 @  }1 T7 q' Mod may error on key generation
; c) n# `( n$ |" b! }lLngResult = (lLngMod * lLngResult) Mod Modulus
8 L4 B3 J4 s& A" ~, n6 VIf Err Then Exit Function + l+ J) W" X+ u/ }+ q! K+ S
Next ! |0 Z9 R+ s) r, Y: [
End If : Q% s# k/ T. c' `
Crypt = lLngResult 1 ^0 O4 z# \. ]2 X2 K4 p& B1 W
End Function* d' R& Z2 u& l: j& E

4 a6 i6 i" p! J9 x  FPublic Function Encode(ByVal pStrMessage) 2 z7 f/ q: C1 R* L. o( R& D6 g
Dim lLngIndex 7 Y+ t- P) @) i. |9 G
Dim lLngMaxIndex
8 b. i$ M, c& r6 t  wDim lBytAscii - x( v" A1 h" o3 i4 p' `' B
Dim lLngEncrypted 6 q( y$ n5 U5 ?% W& D; c: s/ |
lLngMaxIndex = Len(pStrMessage) : n7 w) C. U& @' J+ k3 `
If lLngMaxIndex = 0 Then Exit Function : D0 E" x! u: ]) r5 e: P5 Q% X
For lLngIndex = 1 To lLngMaxIndex
% O7 D  ?6 b8 T  RlBytAscii = Asc(Mid(pStrMessage, lLngIndex, 1))
. u* D* G: y8 W) ZlLngEncrypted = Crypt(lBytAscii, PublicKey) " R7 u; I) A0 [9 }8 s
Encode = Encode & NumberToHex(lLngEncrypted, 4)
$ y- q1 F- I; H" v/ sNext ( [% T, I% V+ E1 ]
End Function
& h' l! a2 t! R9 gPublic Function Decode(ByVal pStrMessage)   ^0 [! A4 ]& |( H$ _9 u, A4 e" `, Z
Dim lBytAscii
" r2 X9 p# C. Y2 eDim lLngIndex
  K$ }. y$ L0 C! u7 j1 |/ `. L% X4 FDim lLngMaxIndex ; C' k) O0 n3 V) E/ W8 q6 s! @' R
Dim lLngEncryptedData
. v& \! J" Z% h& M, MDecode = ""
# H$ o! O/ ^! T% BlLngMaxIndex = Len(pStrMessage) 2 B0 ^3 i3 E! t; m' r+ Q) [* `
For lLngIndex = 1 To lLngMaxIndex Step 4
1 s1 Q; o, V+ C- ilLngEncryptedData = HexToNumber(Mid(pStrMessage, lLngIndex, 4))
1 E# N: Z2 w9 y, H8 x0 A$ |. nlBytAscii = Crypt(lLngEncryptedData, PrivateKey)
9 i* ^; J2 U9 }* m- y( QDecode = Decode & Chr(lBytAscii) + P- s# A/ k6 A
Next 4 m$ `) e( a# V% ?/ F
End Function 3 b  v* M( e: ^4 }3 n4 F: u
Private Function NumberToHex(ByRef pLngNumber, ByRef pLngLength) - o5 A% j" Z/ {. g: e
NumberToHex = Right(String(pLngLength, "0") & Hex(pLngNumber), pLngLength) " C4 U6 d% m: h( n* _
End Function 7 M6 N$ f% R, P6 @* d
Private Function HexToNumber(ByRef pStrHex) 8 w& y% F  j* k: O5 n& o
HexToNumber = CLng("&h" & pStrHex) % M+ `% k1 W& v- S0 N. ^
End Function 3 y' ~4 N! D' q/ Y" w2 n
End Class 3 K! w% c! {: {$ ^5 l; {
function Encryptstr(Message)
% `: J* V" s5 W7 Q* J) U; RDim LngKeyE
. j+ B0 a" J% a2 QDim LngKeyD
2 v5 y5 ?* ~+ lDim LngKeyN 1 O' m5 K  V0 j6 q" v, p
Dim StrMessage
* M+ E+ P4 y7 x) |6 _8 KDim ObjRSA 8 ]5 l1 ]* j) p9 }! g- T, e7 R
LngKeyE = "32823"
) @% y# _! Z3 Q( {4 G- g# j- H" [LngKeyD = "20643"
9 u7 I1 d, x& V" G+ u8 M9 k% jLngKeyN = "29893" ; [0 y8 U5 a. i3 h. L6 U" u4 e
StrMessage = Message
& s6 M( C- U- M& P, g' d2 ~Set ObjRSA = New clsRSA
9 s1 B  A% s% w# I0 r0 v' lObjRSA.PublicKey = LngKeyE 3 r, ?: j: k, N) l$ }! z
ObjRSA.Modulus = LngKeyN / f, T- q+ ]( ], f2 i$ L
Encryptstr = ObjRSA.Encode(StrMessage) 7 X+ L; x4 v! ~3 n: e- f: C
Set ObjRSA = Nothing ) E6 h0 n9 }! D4 o8 i4 y6 \# k0 T/ h
end function
' \. U6 |6 r2 L) [Function Decryptstr(Message)
- c: V6 [4 S& l6 Q, ~* ^; cDim LngKeyE
( F- w9 S5 j8 W) d1 M% _Dim LngKeyD : e' w& B; t- z5 J5 h
Dim LngKeyN
+ _* ^" C  q) B% [Dim StrMessage
' {& {! f( z- z( H# z0 JDim ObjRSA & ^+ o) k- X6 W3 c* j- ]& O4 p. f
LngKeyE = "32823" ( a7 K$ U4 M+ e- B" [8 }
LngKeyD = "20643" ; S  b& o+ d$ P6 `) q
LngKeyN = "29893" $ t- {) O3 {% k
StrMessage = Message / \' U4 u+ M% C8 S
Set ObjRSA = New clsRSA ( k+ ]6 x" y( R/ z. o
ObjRSA.PrivateKey =LngKeyD
  }( }5 k7 G0 D! ~7 ]) sObjRSA.Modulus=LngKeyN
' g" [' t5 ~( f' jdecryptstr=ObjRSA.Decode(StrMessage)
) x+ A* N& f5 ESet ObjRSA = Nothing
- M0 s0 \1 D9 u. kend function 4 k- t- N9 H$ T" {5 u; N
%>: t! a  b) n3 a8 u$ e  F6 E# ]
===============================================
- ~1 B! a* p6 b; L4 S/ m, t' Z) [7 N. `% Y+ n! i0 ?, y7 l1 T: A
还有一个用于测试这段代码的test.asp
/ Y' a% q5 x/ H$ g有兴趣的自己搭建个IIS测试下
# ~, N. Y  U( ]3 Q<!--#INCLUDE FILE="RSA.asp"-->
* I: p: x0 H5 {1 ?) _4 [; k<%7 }/ b! J' @: ^& M$ Z: Y
function Encryptstr(Message) 4 W7 ~/ o( e( g+ O! P0 T- b
Dim LngKeyE   v/ Q; V9 J# h
Dim LngKeyD / B" C  q4 Q6 H9 D+ y5 \& n
Dim LngKeyN 6 P* d8 s" ]& A
Dim StrMessage " x0 B* X) f1 G: t$ P( T
Dim ObjRSA
! j2 D" k2 a) Z4 D+ |' uLngKeyE = "32823"
6 f! v- v( B: Q% ^5 ]5 ^- s9 n2 j$ mLngKeyD = "20643"
% P2 k  b- O0 |' H  [9 r% {LngKeyN = "29893"
7 I3 \6 j, C. q$ f$ YStrMessage = Message
3 W( ~0 R8 @' j. RSet ObjRSA = New clsRSA
! F- s* F1 F8 k  u9 y: D. g2 N1 WObjRSA.PublicKey = LngKeyE : C3 v) Q9 Q4 U9 X: N
ObjRSA.Modulus = LngKeyN
, z9 r2 G! e+ }* s* t$ f# f7 H, M) SEncryptstr = ObjRSA.Encode(StrMessage)
$ l3 H3 x+ J$ B$ f6 iSet ObjRSA = Nothing
4 r/ B. p! A! M/ [; d3 i# ?: `end function ! {/ C6 \6 f: q2 `! b5 H
function decryptstr(Message)
2 ?. t& s2 M. U! @Dim LngKeyE # k5 u& }1 i9 y. p
Dim LngKeyD
: \5 |- q: a: t+ B! e" HDim LngKeyN
& z' O! [9 p9 Z& ODim StrMessage
8 K- p8 A: ^" g% N. M+ LDim ObjRSA ' P1 @* e/ i5 \' \# ^( W2 e
LngKeyE = "32823" & \  i7 Q) n7 |( P5 ^' e3 i0 g% {
LngKeyD = "20643" " w& }/ b) X" K3 k% k: X  _' J2 K
LngKeyN = "29893"
7 Q; Y3 O3 z1 ?' H' u) GStrMessage = Message
( x- I( p1 v( I3 ySet ObjRSA = New clsRSA
: q6 i- w, ^- y# P. ^+ f: \# z& XObjRSA.PrivateKey =LngKeyD * Q( }! m" v3 l, D2 a4 a- k% @
ObjRSA.Modulus=LngKeyN " w" ^' y$ S; h  R* f2 I
decryptstr=ObjRSA.Decode(StrMessage)
7 ?/ R3 E  r% H$ p# OSet ObjRSA = Nothing $ i* ^/ P, g3 Z7 q6 i: o& T( y# }
end function
3 p4 Z" N" a# H3 x$ h) j5 L% ddim last,first 5 y; Z( {$ r( @$ Q3 z
first="!@#$%^&*()" # E& i" y% M! a% N3 g( W
Response.Write "加密前为:"&first 0 x8 G& x8 u$ w. q# B
last=Encryptstr(first) ( ^' @! v5 I% D: p
Response.Write "加密后为"&last
3 y; L8 m. T! K: m/ J1 Y4 ZResponse.Write "解密后为" &decryptstr(last) 4 U3 c- M  U- b0 w
%> ==============================================$ d7 {  K1 m2 v* m# P
剩下的就是字符的对照表了. o/ t8 l- \' U* [4 H, f9 `/ A
===================字符集================8 y8 Y2 r: P3 a! J* F
1_____6EBB
/ T, H# }1 a4 Y1 J0 b2_____5C1F/ h) K0 d# R4 P+ G& `( l- ?& M) X9 a8 c
3_____4D75
! O' z+ v6 J+ }- R% i( ~6 n4_____26CC, i; {$ g; T+ y$ G$ k4 x9 q
5_____4F88
$ ]8 R5 k+ L6 @0 n6_____3F4E
0 B7 W2 H! e" y; N8 I( f0 e' S7_____0A9D+ S8 t+ M  M( A3 q
8_____1A1C! L  b/ k. _, b
9_____6D20
2 H& S$ `9 x( z9 U6 M0 L0 Z7 K" `0_____1089
* d5 @' Z% J( P, A5 ]a_____0F3E
# J6 C7 _7 u% ]! [0 c* Ob_____3159
) Z$ U- ^: H) Q' q8 Ac_____3517
- F2 c* ~  O8 j# ?. [d_____419C
. r7 D+ B/ m5 g% @) t& be_____615C
2 |! m- F8 k, K' A/ k: bf_____556F2 ^) I( H4 X* A3 C/ B
g_____2B7F
0 H. q( j& |- f5 f+ [h_____0F9C
! I, j1 [6 Y* j5 Pi_____00FA
: D4 V* a9 V1 x5 O- \! ej_____5A50' \; [/ ~7 Z1 |
k_____28505 I. k7 }0 z: e4 a$ v( d5 G3 B) o
l_____3E7B
/ w$ i+ T* K5 om_____71C5
8 Q5 @! d- `( ^8 Y6 ?! o4 r7 |. P; tn_____1FC85 Z8 t& _9 k6 D. o
o_____74C1/ y( I# i* y3 Z+ h5 Q
p_____5FB8* x7 i' A( ^, X) {9 D
q_____6085
! y4 C7 N( V- U0 I( E; z! V6 ir_____3AC4
% N" f6 g* B, a9 H0 U- l2 Es_____2F50
  p  @3 j1 f8 @1 o- T) ]# V* zt_____36F8- i, {5 S) I+ x( J' z# e# A; T
u_____70104 A2 A# g, L; C8 K2 G
v_____0B42
4 c5 [5 f8 o+ Z# W( Tw_____1C7A- f- S" s, F/ }2 s$ H
x_____16F84 B! s" {) d% N# P
y_____2EE7
0 T2 G1 D0 b: {7 G7 B, `z_____5CF31 B1 A. \9 X' x1 |  x
!_____6233
& ]  ^, P% A6 u3 i2 I@_____3A45& J/ L8 T! d! q) a7 `
#_____2291
4 B7 D! P$ q. `4 J$_____5D5C
" m: F% h9 \- Z+ N& K9 U( h! |0 n%_____09B9( V& i2 Q5 c% ~0 }) k1 r  R
^_____43EA, T: P/ T% H' F
&_____62B9
" Y: [8 C9 U* m& [+ T( a& Y7 e*_____6301# s2 I: f6 w  I
(_____4659
4 O$ U1 h- `1 K! a( C+ i)_____5C82
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