[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- X; H; }2 w& n# K
原始出处：http://www.3ast.com.cm
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0 M  k5 g& G4 V+ l9 s. }看不懂的直接绕过
! r( X7 i3 _! N) \: A) E$ H. Q加密前为:hwy123456$ z) I5 W( a/ b) a( |2 W
加密后为0F9C1C7A2EE76EBB5C1F4D7526CC4F883F4E+ b# i$ ]& u+ S# e

; n# D" Z& w7 |# r============================================
1 F* N& ?4 c' d7 |8 L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; X% K0 t: d& k, L/ l/ Y
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 C8 _2 ?' S/ r以下是RSA算法文件& E" ]* j: c- X- I5 k* l
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文件名RSA.ASP/ D3 U, \" y4 ]. I+ z
===============================================, H, f1 Q$ E$ p/ v( {3 ]; K/ X. P
<%
- J# M0 G; a, d9 T3 V" e. n. `Class clsRSA 1 B/ g9 l# ~. y& l" ?8 ~
Public PrivateKey 3 k, C8 N3 p5 B$ d1 F
Public PublicKey ( o6 l" G& p2 R5 K  A2 L# q
Public Modulus 1 ^0 ~+ E& U9 g4 B
Public Function Crypt(pLngMessage, pLngKey)
1 K( G( v8 F  w8 r" M+ R6 TOn Error Resume Next 7 ]! M6 W* ~' M: R3 O/ [2 m
Dim lLngMod
" i) J- v0 g+ QDim lLngResult , q; G- l3 C# \" R  |
Dim lLngIndex ) E0 p2 w7 c3 R' e$ t# I
If pLngKey Mod 2 = 0 Then 8 o& a9 S/ s4 l, d7 u
lLngResult = 1 , Q/ h" j% l" g! o4 \! r
For lLngIndex = 1 To pLngKey / 2
+ L& V0 b' g- d. y; `9 U4 ^lLngMod = (pLngMessage ^ 2) Mod Modulus 5 D& O5 y1 h& u2 z+ i
' Mod may error on key generation
/ g* I, M! Q) tlLngResult = (lLngMod * lLngResult) Mod Modulus 9 _6 S, j3 R" \) z  P: m6 U
If Err Then Exit Function ' q/ x1 g4 K3 }( {' s
Next   R/ Q% h. x, o3 V  w
Else
0 A6 V' ~9 o1 h8 BlLngResult = pLngMessage 1 }. k  _" ?, H$ }
For lLngIndex = 1 To pLngKey / 2
* }6 g: c/ i: z3 ^7 V+ Y4 |lLngMod = (pLngMessage ^ 2) Mod Modulus
6 o" w3 s- V+ m$ ~+ u; L# TOn Error Resume Next 0 h5 w4 V) w7 w$ v
' Mod may error on key generation 0 |) M6 c' L& g( c( ^
lLngResult = (lLngMod * lLngResult) Mod Modulus 5 m' Z# b& Q0 e" z
If Err Then Exit Function
( y! b* L0 O2 u: u! n/ kNext
0 I  ?/ v+ B- M; pEnd If , o# e' q4 z5 N9 }5 A- X! B1 B" N
Crypt = lLngResult
5 H" }/ \. p  @End Function
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% `, n% m' m" \( Y7 T$ q$ q- F! tPublic Function Encode(ByVal pStrMessage)
, `' A! A/ `5 b6 pDim lLngIndex
; Q. l. _; w: K3 M+ QDim lLngMaxIndex / @2 h, t. [9 _) K" `
Dim lBytAscii 5 Y# t9 e+ C! {- h% B' X
Dim lLngEncrypted   y7 w! p4 W2 V" H- F) u
lLngMaxIndex = Len(pStrMessage)
6 S7 j9 c0 r$ g! X+ PIf lLngMaxIndex = 0 Then Exit Function
: n. i" b  i# T4 p/ H' lFor lLngIndex = 1 To lLngMaxIndex ) S8 S5 y5 u  t' k4 d1 M# s
lBytAscii = Asc(Mid(pStrMessage, lLngIndex, 1))
' T8 I& e- H3 DlLngEncrypted = Crypt(lBytAscii, PublicKey) 4 N/ \7 D4 y1 v/ ?
Encode = Encode & NumberToHex(lLngEncrypted, 4)   \9 R8 S+ Y- d) ?1 f
Next 8 R, ~5 J2 b: f" P! i5 j
End Function 4 Q' A' {* ]- z! W9 T; N
Public Function Decode(ByVal pStrMessage) ' D' c4 ~" G$ l& g% K6 q- _7 M
Dim lBytAscii 6 a9 M, }% J2 k' r' t7 ]1 a
Dim lLngIndex
3 L" ~% e& t( c- JDim lLngMaxIndex 1 h0 f. s9 E( n2 H+ g, |! z
Dim lLngEncryptedData
8 C  Z# {- J* G' x: @Decode = ""
. @# i3 I) P& y3 plLngMaxIndex = Len(pStrMessage) 8 _: K0 o; J" a9 a- w, i# U1 x+ F
For lLngIndex = 1 To lLngMaxIndex Step 4
8 L2 y/ n3 Z; D2 I8 M$ o* V" DlLngEncryptedData = HexToNumber(Mid(pStrMessage, lLngIndex, 4)) - @% s" e. }" O: ^6 @( K! k: Z
lBytAscii = Crypt(lLngEncryptedData, PrivateKey)
6 ~" |9 {) T3 m0 C# J% n. |Decode = Decode & Chr(lBytAscii)
& j- r0 Y6 o) @) r$ s/ C5 \! O% Y) ONext & c2 L/ g" {/ Y0 C* |
End Function . W5 e; |( M# `; f' e
Private Function NumberToHex(ByRef pLngNumber, ByRef pLngLength) 3 X  j9 v. m, }$ ~9 M- l
NumberToHex = Right(String(pLngLength, "0") & Hex(pLngNumber), pLngLength) & Y( D7 @0 q8 n6 h; D
End Function 3 z2 M- ?& ?2 @2 O! T
Private Function HexToNumber(ByRef pStrHex) $ e% N, x& d2 l
HexToNumber = CLng("&h" & pStrHex)
4 Y9 x9 `% n$ P) P) |$ NEnd Function
5 b' v; U- v) C1 }: W0 iEnd Class ) @% G2 d9 u/ Y9 s" o
function Encryptstr(Message) 9 A2 T6 q% K; `9 M/ I; R. g
Dim LngKeyE
4 }* f( u8 `: N# \Dim LngKeyD
" z. g/ R# ^6 wDim LngKeyN 2 `% \+ }" v$ I5 Y0 p$ H  T
Dim StrMessage , [, G) M& ^* g" ]2 C+ X  g
Dim ObjRSA
, Q+ G% t9 ~+ g+ B# ?" ^3 uLngKeyE = "32823" 0 X1 f5 G) e6 x; T- {
LngKeyD = "20643"
8 e$ N$ g: i$ O& yLngKeyN = "29893" 3 D+ {3 ~* r" `- `  H! J' j- U7 ]
StrMessage = Message . m& x( t9 D4 c# Q9 O1 `
Set ObjRSA = New clsRSA 2 S5 L" k; c7 u+ Z% w
ObjRSA.PublicKey = LngKeyE $ y) C1 r- [  S( n
ObjRSA.Modulus = LngKeyN
1 _/ c+ N4 d5 GEncryptstr = ObjRSA.Encode(StrMessage) . E; _: ~, _; I- t# D/ q: k
Set ObjRSA = Nothing
2 u0 {6 Q" h; E4 Q% oend function& U  S0 v* Q1 M& M2 ~
Function Decryptstr(Message)
4 o' ~( [; C% KDim LngKeyE
  S; Q2 {+ F# [' O4 l9 QDim LngKeyD : m2 B- m5 v7 H8 x0 Z2 t" u7 R  F
Dim LngKeyN 2 P+ f. `' |9 @% r* R: i
Dim StrMessage
# r( c$ [8 \' \( i9 ^, MDim ObjRSA $ R/ C# _- {- |6 J- K4 \! F- m
LngKeyE = "32823"
) `5 d6 r5 g: u0 GLngKeyD = "20643"
; @% |+ g" R" y' m8 O" C4 iLngKeyN = "29893"
. K3 U0 r. m' L  a/ v8 |3 B; xStrMessage = Message ) ^4 ^3 ]  `1 |
Set ObjRSA = New clsRSA
* L3 v& F" D& H& jObjRSA.PrivateKey =LngKeyD 2 u5 p3 h; k% k6 ~% G
ObjRSA.Modulus=LngKeyN ' ~5 X3 O' ^( \; \; }9 B' [
decryptstr=ObjRSA.Decode(StrMessage)
2 z0 V: p+ q, ?7 {2 ISet ObjRSA = Nothing ) M- }. I) D: m8 c
end function , |; m3 o' J& O  j" o( c
%>( L4 @: W: H6 M& X/ M0 i% M
===============================================
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还有一个用于测试这段代码的test.asp$ F$ F5 Y! d1 w; P
有兴趣的自己搭建个IIS测试下7 n) s) T& S: R; b. b
<!--#INCLUDE FILE="RSA.asp"-->
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5 ?# s, c' Y& hfunction Encryptstr(Message) : w6 b% O7 z0 r! I
Dim LngKeyE
2 B9 M( {, W% H/ T; mDim LngKeyD 0 t4 f- R& n' K" |2 G# A
Dim LngKeyN " U( x( z7 W: k) h
Dim StrMessage 0 n$ j. o" m* F5 f' c
Dim ObjRSA * e8 K. m4 a6 M% t) g, r5 |
LngKeyE = "32823" 3 A% b- O- _: f2 r, g: Y" W8 o
LngKeyD = "20643" : N+ z8 X: Y0 m! I
LngKeyN = "29893" % G  k! k$ T+ g8 F% g5 w
StrMessage = Message
) `' b: h) d" m3 p9 D8 oSet ObjRSA = New clsRSA
, z) U" x3 P8 e6 dObjRSA.PublicKey = LngKeyE , B* _7 Q: z. N; }* P
ObjRSA.Modulus = LngKeyN 6 \/ _6 Q3 T8 t
Encryptstr = ObjRSA.Encode(StrMessage) ; c0 b3 P/ @' b! _1 V5 ?! k. v
Set ObjRSA = Nothing   r1 C$ D/ P" Z. [& n) ?
end function
  ^' S& ?* h3 P. H' S- rfunction decryptstr(Message)
1 e% D8 B; ~+ H0 R2 xDim LngKeyE
# M+ S0 N& y: k, b) F  BDim LngKeyD
9 u; S0 h0 e& h! ?3 N5 pDim LngKeyN
, J: n8 C5 G5 L" m, u) X3 xDim StrMessage
& L% b, [, A  n/ ^% ODim ObjRSA
) A# G/ g4 P! xLngKeyE = "32823" : g7 r0 x2 y9 M# r3 N! Q- l
LngKeyD = "20643" ! u2 _/ W; f3 }: Y
LngKeyN = "29893"
* [* O$ Q# p4 e3 [StrMessage = Message + ?& J/ T& b$ }4 r
Set ObjRSA = New clsRSA 6 H+ _) |$ K( {
ObjRSA.PrivateKey =LngKeyD 2 r6 M4 @& `/ t# d/ n# }
ObjRSA.Modulus=LngKeyN 0 y  D$ ]4 R. J* V6 k+ d) ]- ~5 @
decryptstr=ObjRSA.Decode(StrMessage)
2 X0 q& f% k  p1 ~: c' x, FSet ObjRSA = Nothing 1 e4 X% i% ^3 `9 G3 ]
end function
) I% v: [* b5 H4 q% Rdim last,first
* H1 `3 J2 g0 m- ^: }first="!@#$%^&*()" 8 ~7 {( N$ S* L* L6 ~
Response.Write "加密前为:"&first
: A% o* W4 D% X& Tlast=Encryptstr(first) 8 o* E) I" R, h9 _& I: `
Response.Write "加密后为"&last
# q6 q3 K4 O2 nResponse.Write "解密后为" &decryptstr(last) 9 T7 J( ^  r! [# F- S
%> ==============================================3 ~2 a- o* k1 O: X
剩下的就是字符的对照表了5 Q& V0 K' ~! ~# x1 u  P& l7 i: I
===================字符集================' L5 {* F% Y! A$ j2 b! a8 J
1_____6EBB
3 L: U1 j' y. V# u! n+ E2_____5C1F1 x2 E9 [# X2 t, Z' }
3_____4D75
, {0 |7 P8 b2 e4_____26CC* ^# g% R: c; {$ P' J  S0 C
5_____4F880 q1 {" ?4 v; P5 f
6_____3F4E
# @5 i- L) B7 T" k3 s9 b1 ^4 F* D7_____0A9D) s: E* Z8 k. G# Z
8_____1A1C
4 b5 ~& g# g8 |9_____6D20& \& X4 n3 i# H- d! X
0_____1089
; m" Q( u2 ~- W: I6 t: \a_____0F3E
, {& ]! C% R& e* [+ Gb_____31595 _* e( t5 v( X
c_____3517
- G; r5 h. @* g: O- k4 h/ ud_____419C4 p; U- ]1 O' p  g7 `
e_____615C$ \( e& M( W0 \! ^# f
f_____556F
3 }" c* S3 N. r( T  a1 i& c( U8 Hg_____2B7F
6 ^4 q/ g8 {5 ^: {2 A" R/ {h_____0F9C1 C) K; v2 W- \( n5 T
i_____00FA
' i) o: Q8 |- |" U- K/ n- \6 Fj_____5A50
- s9 q  s/ z1 T* H% Zk_____2850
" ^: L+ L/ o: F% `l_____3E7B* i, ^+ u8 _; A+ J4 L4 `
m_____71C5
8 O" Q% x' `5 i: m2 D) P& In_____1FC8
+ R+ E- H% E! J/ |& |% qo_____74C12 D1 d8 ]! O+ M/ y0 X, \
p_____5FB8
8 I* h* d) V; [1 l' [7 F0 g  C  xq_____6085
' x: V6 w0 u  f6 Br_____3AC47 s. b4 z+ |) C
s_____2F50
( w2 T- `$ W6 q7 Q* Ft_____36F8
# K$ Z6 n, A7 w$ A& du_____7010
8 J/ p6 X  h+ p+ f  O0 ?v_____0B42( O# y( ~6 {( L, A! J8 G. i
w_____1C7A' X7 K4 H% j# O7 Q
x_____16F8) e: H0 }0 [) P( }3 h. |
y_____2EE7
5 L: ^% F6 j4 ~0 w3 zz_____5CF3
: V3 ~0 s5 c$ F1 i- _7 P2 f% |8 g!_____6233
6 g1 }7 z3 _, J, Q# B@_____3A45; A# l* T3 ]2 }1 r4 a) c6 ~
#_____2291- f1 U9 N' [& O( D: d1 |
$_____5D5C- R) a* U3 y1 [; D7 Z1 I- X: V
%_____09B9
/ i. G) F/ p0 e" W( K7 e/ h^_____43EA
) I: \* l! @* j) U1 H3 ?&_____62B9
- D9 t$ @- V" |) f*_____6301
) T) k$ g9 n: ~8 D* e% {(_____46599 [* [" x$ \7 g+ w5 ^
)_____5C82

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