[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/ w3 A5 I1 e4 ?" M2 ?. ?, Z
原始出处：http://www.3ast.com.cm' b7 o  r, W4 P- H; `. `9 ^4 ]6 V

5 B! i. [9 X6 D( h. A3 j: f看不懂的直接绕过
) ~6 f" B  j8 R( @加密前为:hwy123456
1 Z8 b  w/ A; X4 h, f$ P加密后为0F9C1C7A2EE76EBB5C1F4D7526CC4F883F4E
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============================================
5 Z+ }' E; d, w2 p9 o0 H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
7 x* I! u4 H5 V# ^' `0 H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( r; {* `- Q" K" ?
以下是RSA算法文件& f- _) M! s+ E# B4 \7 O

' C( n  O$ z1 q5 j- S  O! f文件名RSA.ASP! O8 a- z* R3 e; r9 u- N( o3 x
===============================================) y" c- K: U7 ]% n: K# |9 g
<%
( l2 A" s/ y7 G0 ^" F. QClass clsRSA
( N& ~2 _5 D2 GPublic PrivateKey
/ _+ d2 X0 D  _  C# [  H( r$ lPublic PublicKey - ?0 l0 F; c' c/ S( `; l) n
Public Modulus - e. f3 B2 C4 W' {( C- z6 k* w
Public Function Crypt(pLngMessage, pLngKey)   R" V6 q& P' k/ w
On Error Resume Next
$ e9 B4 p( H% E9 ^: KDim lLngMod
$ z/ x3 u% J  D& iDim lLngResult
7 m, Q* R8 v: ]0 R4 GDim lLngIndex
5 y& S6 h2 x8 R! q( bIf pLngKey Mod 2 = 0 Then
$ p1 o: ]( r; N  ZlLngResult = 1 9 i) d% `/ k. l3 j
For lLngIndex = 1 To pLngKey / 2 ' u' ?/ E% P. Y7 e* r
lLngMod = (pLngMessage ^ 2) Mod Modulus
6 V; f* q. r2 m6 H( Q' Mod may error on key generation 1 r& v9 W4 n3 {, `
lLngResult = (lLngMod * lLngResult) Mod Modulus ! B0 f- ^, U% d3 p* `; M( s3 ^5 d
If Err Then Exit Function
( g# L0 ^& w. R- P+ x; CNext 4 j7 H$ C0 x1 N2 h9 E% T/ B% o4 \& t
Else . Y2 D; O7 x' R. |
lLngResult = pLngMessage
* b! C7 h% H: TFor lLngIndex = 1 To pLngKey / 2 ) @$ ?# i' S2 x" `! x1 |8 E
lLngMod = (pLngMessage ^ 2) Mod Modulus
& Q0 S+ H2 |4 Q, POn Error Resume Next
+ B8 A' f2 k5 F+ q8 \) d' Mod may error on key generation , g% G; a3 J( g) ^
lLngResult = (lLngMod * lLngResult) Mod Modulus
* d- C& n% Z0 I: X5 T* j0 |  w( x1 S9 IIf Err Then Exit Function
  {; Y9 B9 \9 X/ f& h! |+ V, lNext " `2 H4 p, B4 ?
End If / C) D5 r3 D' o2 e5 R' t4 L
Crypt = lLngResult 2 U8 r3 Z* n; M4 b! E; D) t
End Function
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' j6 Y; L- X; `& }1 OPublic Function Encode(ByVal pStrMessage) 2 l3 P$ n: h' A6 @0 w$ P8 ^( `  {. h
Dim lLngIndex ( t. m, K( x* G& O# h* s
Dim lLngMaxIndex ) \. |3 g. M4 ^& g9 ?% x% u. ^" Z
Dim lBytAscii
9 x# Y5 z+ p, H+ V1 ?9 G% F9 S) ]Dim lLngEncrypted " W( S- }. M1 X
lLngMaxIndex = Len(pStrMessage)
& U9 N* d2 n! ?5 jIf lLngMaxIndex = 0 Then Exit Function . A; n4 C1 _& T: s* N; i/ v
For lLngIndex = 1 To lLngMaxIndex
, l& v" S" m% w0 a7 e5 q+ O/ rlBytAscii = Asc(Mid(pStrMessage, lLngIndex, 1)) 2 u& E7 k7 [( f
lLngEncrypted = Crypt(lBytAscii, PublicKey)
5 o9 e3 v# g/ J" n5 f* M$ ~Encode = Encode & NumberToHex(lLngEncrypted, 4) 8 y( S" b. j' H" x$ L- Y7 |  g
Next
# ?) `- }, l8 H5 fEnd Function 8 }; z2 J: P# K/ Z8 M0 e( r
Public Function Decode(ByVal pStrMessage)   `* l' ]: c  n; O0 X, L1 x
Dim lBytAscii 1 k& ~5 n; y- S4 P% }+ Q- ?' A, B1 ^
Dim lLngIndex 3 |. u  ~) l9 v+ }/ E
Dim lLngMaxIndex
0 G# P7 G+ G- X: v9 |  \3 qDim lLngEncryptedData
' N, Y8 Z7 m6 w4 N5 [& ^Decode = ""
# g) m' r; q- ]2 q( ~# \" a$ tlLngMaxIndex = Len(pStrMessage)
- Y( }8 A/ U' M. h3 g6 H1 CFor lLngIndex = 1 To lLngMaxIndex Step 4
! E% @+ N! w; AlLngEncryptedData = HexToNumber(Mid(pStrMessage, lLngIndex, 4))
& |' k1 w) @' {0 q5 I- \lBytAscii = Crypt(lLngEncryptedData, PrivateKey) 4 _/ v& W* X4 ^5 E9 u
Decode = Decode & Chr(lBytAscii) 5 \/ _' Y% h6 G5 q; j
Next 5 q! m. G, J7 z4 X) p
End Function 2 L/ A; e/ I+ l2 a, c; J+ s6 Y
Private Function NumberToHex(ByRef pLngNumber, ByRef pLngLength)
4 Q& b+ P' e4 JNumberToHex = Right(String(pLngLength, "0") & Hex(pLngNumber), pLngLength) - A9 `" \8 m3 N1 r7 s6 [
End Function
3 G. V% w) m- F' h* G- bPrivate Function HexToNumber(ByRef pStrHex) ( D9 G2 B% w3 _
HexToNumber = CLng("&h" & pStrHex)
1 x0 p2 t' [- E3 T7 c. gEnd Function 7 R- N8 D* o" `2 d- Q* Y( c4 w6 \
End Class $ J$ T( q  _7 e$ j0 u
function Encryptstr(Message) : n9 Q! ]5 g* R" L1 ]' y0 P
Dim LngKeyE % H9 E; r/ k$ h- W' k
Dim LngKeyD ' }/ d( t+ q6 V5 e& c1 i
Dim LngKeyN 2 V. G. t$ }) z
Dim StrMessage
% S# s& s" z  A9 q5 l3 s6 [Dim ObjRSA 6 k: r1 L5 J/ @3 P: D( v, D9 F
LngKeyE = "32823"
/ `; k7 v9 U2 N& B2 T  H9 \LngKeyD = "20643"
, u* Q/ A2 l: E" TLngKeyN = "29893" 0 ^1 m, G9 k7 i+ g% N
StrMessage = Message
; p$ N1 h; V! e/ Z* s. JSet ObjRSA = New clsRSA 3 Z  L8 E+ J  `1 Y$ U' [
ObjRSA.PublicKey = LngKeyE 7 @- Y! M( ]- W3 G! o
ObjRSA.Modulus = LngKeyN
# w- i0 m1 Y- U9 @8 t7 mEncryptstr = ObjRSA.Encode(StrMessage) . q; F1 t7 }* F- q: v
Set ObjRSA = Nothing # J" \& c0 v( B' t# }6 n
end function( f  f+ w5 }: k/ }/ ^
Function Decryptstr(Message)
  A4 W# f8 Q. l. n2 V: s# NDim LngKeyE 3 o- ]  O) ?# T+ E
Dim LngKeyD " @5 Z6 T. t, d% |  e" p4 i
Dim LngKeyN " l; s% Z% `; ^
Dim StrMessage
. }' g4 a: q2 z4 vDim ObjRSA
% m& L! Q6 ?  a1 I5 T, ?0 dLngKeyE = "32823" ( b; S4 M6 b4 f0 r4 e
LngKeyD = "20643"
4 i8 i5 s# C7 H) c6 GLngKeyN = "29893"
8 [1 Z% ]: b5 ?4 c- t4 \% t: yStrMessage = Message 1 Z* ~! p4 ?0 m9 h* l% Z
Set ObjRSA = New clsRSA 1 l6 J5 [3 p. D1 ]% a$ `
ObjRSA.PrivateKey =LngKeyD - _4 Q% J+ @) ^8 _8 I9 n
ObjRSA.Modulus=LngKeyN 8 \8 D5 ]- e) H, S' }
decryptstr=ObjRSA.Decode(StrMessage) # a, h' l; E! O4 l4 W0 ^& F
Set ObjRSA = Nothing + z  L3 P% `" P# t
end function
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===============================================! L0 `& m; M4 T( ^! M) j! [
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还有一个用于测试这段代码的test.asp1 {0 h$ s+ t' w) l% ]3 d
有兴趣的自己搭建个IIS测试下
; }6 Y1 T8 X/ ]' z<!--#INCLUDE FILE="RSA.asp"--> + b0 l* {8 g& w0 p0 R5 O- ~
<%
: W- S5 d; G0 p. S, e: [function Encryptstr(Message) ' e$ m/ e3 C" l5 Y1 B: w
Dim LngKeyE 0 t4 Z% h! B! o8 Z
Dim LngKeyD 7 d  _; v& l) e! Y4 z& v
Dim LngKeyN
& T. H( l  y) Q3 \0 aDim StrMessage
; x1 t4 u  v& m7 _' i& nDim ObjRSA ) d3 Y, `0 I6 B
LngKeyE = "32823" : }. P' a& W4 a3 S2 Y  o4 ~4 R
LngKeyD = "20643" 8 u+ o1 Y, b0 Z; r" @" D2 C/ R5 m- [2 ^
LngKeyN = "29893" 3 e3 `8 @' O/ Q4 N  s
StrMessage = Message
# e$ Q" R( q5 |4 v# F; VSet ObjRSA = New clsRSA 5 T2 s) ~/ d; q& G; ?9 o: w
ObjRSA.PublicKey = LngKeyE ) z3 _4 P8 T. `+ n) ?) F
ObjRSA.Modulus = LngKeyN + u  e* D4 |! |  W# [- T, F
Encryptstr = ObjRSA.Encode(StrMessage) # t2 v3 V/ r/ N9 `0 x7 C
Set ObjRSA = Nothing
$ X1 h! `0 ]/ ]8 Q, ]end function 2 Z1 T* s- t" o" ^9 P; u4 q
function decryptstr(Message) + R5 q) p8 R& z! w
Dim LngKeyE 6 Z# c( b' D9 w' m- m
Dim LngKeyD + N; N" X/ ^" X1 d$ c+ M7 r
Dim LngKeyN
& F( T( q& t& W/ G6 f$ GDim StrMessage
% _" _3 P& k2 HDim ObjRSA ; E1 z' ]8 ], M. A$ X* K0 W% T
LngKeyE = "32823"
' o# O7 ~4 w& B2 T8 i' D3 D. ?LngKeyD = "20643" & J6 Q  T* E5 `& n% V
LngKeyN = "29893" 0 V3 u% S# h! P7 n& p7 K
StrMessage = Message
3 M  i7 ~% n+ _Set ObjRSA = New clsRSA
, O8 `! N8 d& W9 eObjRSA.PrivateKey =LngKeyD 7 G  ]1 g+ |2 ?; L+ J$ O, H( T
ObjRSA.Modulus=LngKeyN
2 E, e9 r' D; c% V0 Edecryptstr=ObjRSA.Decode(StrMessage) 0 L1 t9 R8 m: n$ j5 n& d
Set ObjRSA = Nothing
3 L" y1 T; j5 N) ~5 _5 ~4 P) Dend function
8 x. f  B7 Z* }* Odim last,first , ~# y7 V0 O* A5 P! z
first="!@#$%^&*()"
  @' T) a9 B" L) a( m' O! rResponse.Write "加密前为:"&first * z$ D8 Q3 _' a$ ^! s: |2 E8 c
last=Encryptstr(first)
9 M; D/ {8 Z" u. D+ KResponse.Write "加密后为"&last 6 r3 Z& h* j+ j: V# X& J
Response.Write "解密后为" &decryptstr(last)
& A" {, L% l6 f* Y: G" m- v! J%> ==============================================. r0 R# a4 S* W) i
剩下的就是字符的对照表了
6 L% @( }% m0 Y. e===================字符集================
7 D5 K' Q4 ?7 V9 V9 W; O6 a' ?1_____6EBB, U7 Y, P9 N$ o7 B2 d
2_____5C1F( `, \4 C& F0 z( d
3_____4D75
3 d) u0 C% C5 D+ u9 _) a4_____26CC  A+ A* j# o8 `4 a1 r$ U: Q" c
5_____4F88) q, q9 h7 }4 v
6_____3F4E/ i! v3 d8 ~: y. d; B
7_____0A9D; D/ Z+ y" S( H5 u
8_____1A1C; u5 d/ ^2 S* T8 L3 [8 d  [- W9 b
9_____6D20
% j1 }& x( N+ p6 T0_____1089) \, _5 L* {3 J1 {! w3 Z, n
a_____0F3E3 Y3 f) C1 \/ ~* X  F4 ?1 Y* l
b_____31595 u  }+ C  ]+ C
c_____3517
( g% I. Y0 ^8 ^5 s3 d0 v8 sd_____419C" `% L8 }( s* Y$ {) o2 j) @( S
e_____615C
3 h) [5 k1 \$ Uf_____556F
# m8 a3 |0 ^  f5 ?g_____2B7F, F3 ?+ u6 J) `* s: U0 Q: p
h_____0F9C
( d) N# [4 Y2 v/ Oi_____00FA! m2 l* G. E" E' q- T0 o
j_____5A504 ]* m& O9 o* Q3 A6 A  M
k_____2850
2 ?% l1 a5 F& i- El_____3E7B
7 K( T  i& e. E- Xm_____71C52 E- N  ]! }. B2 L
n_____1FC8
6 y$ w& f$ A$ C; k' o9 Yo_____74C1
& Q/ L( f/ _3 D3 tp_____5FB8: F3 C8 d% h1 S2 Y8 {
q_____6085- r& m; Q! v# H7 ]; [
r_____3AC4
" H1 E. ?! K4 l# q; m* Bs_____2F504 W( R, a+ `5 g* d' @
t_____36F8% E. Y0 J1 Z8 z
u_____70103 y' g  u0 A1 W; g! m7 {2 j/ k
v_____0B427 o% Q  A6 p2 H
w_____1C7A- v/ F' }. {+ @9 i
x_____16F8
: p' U5 {7 B: e( H$ zy_____2EE7
' G6 Y2 d3 E: t! ~* ?9 ~5 mz_____5CF3
$ a: X' ]9 `8 m5 G# F) C, k!_____6233, x7 m+ X! m  A4 ]- g' F
@_____3A45
+ d4 ~4 D; b7 v: A- J* k2 a#_____22918 Q. V  j. g0 A* S% U4 R
$_____5D5C
6 w# R7 {) O2 Y! a  f%_____09B9
& ]" z% U$ L; i! G^_____43EA8 \$ \8 F; ]- }( m# A# p
&_____62B9; g2 ?6 h; ^* t* Y0 A1 r7 c* Q5 k9 k
*_____6301( b. b, ]. I: E
(_____4659
+ o, w  q' u5 S6 [0 T8 {)_____5C82

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