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コード: 全て選択

Class CPassWord
Protected
	c_nKey As Long
Public
	Sub setPass(ByVal nKey As Long)
		c_nKey=nKey
	End Sub

	Sub getPass() As Long
		getPass=c_nKey
	End Sub

	Function encode(ByVal lpString As BytePtr) As BytePtr
	Dim length As Long
	Dim cnt As Long

		length=lstrlen(lpString)
		encode=calloc(length)

		For cnt=1 To length
			lstrcat(encode,Chr$( Asc(Mid$(lpString,cnt,1)) -c_nKey))
		Next
	End Function

	Function decode(ByVal lpString As BytePtr) As BytePtr
	Dim length As Long
	Dim cnt As Long

		length=lstrlen(lpString)
		decode=calloc(length)

		For cnt=1 To length
			lstrcat(decode,Chr$( Asc(Mid$(lpString,cnt,1)) +c_nKey))
		Next
	End Function
End Class

Sub MainWnd_CommandButton1_Click()
Dim hEdit As HWND
Dim pStr[2] As BytePtr
Dim length As Long
Dim pass As CPassWord

	pass.setPass(1)

	hEdit=GetDlgItem(hMainWnd,EditBox1)
	length=GetWindowTextLength(hEdit)+1

	pStr[0]=calloc(length)
	GetWindowText(hEdit,pStr[0],length)

	pStr[1]=pass.encode(pStr[0])
	MessageBox(hMainWnd,pStr[1],"暗号化",MB_OK)

	pStr[2]=pass.decode(pStr[1])
	MessageBox(hMainWnd,pStr[2],"復号化",MB_OK)
End Sub

コード: 全て選択

#include "LASRM_DLL.idx"

Dim rd As Long
Dim C(7) As Long
Dim CH(15) As Long
Dim CE(7) As Long
/*
'-------------------------------------------------------------------
 メモ - インポートすべき関数は、次の3つです。

Function SetCH(CH$ As BytePtr) As Long
説明:http://web1.nazca.co.jp/hp/himajinn13se ... ドを設定してください。
　　返り値・・・エラー（-1）、正常(0)、注意(1)


Function Angoka(InpFileName As BytePtr,Password As BytePtr,OutFileName As BytePtr) As Long
説明:第一パラメータ・・・入力元ファイル名
　　第二パラメータ・・・暗号化時のパスワード
　　第三パラメータ・・・出力先ファイル名
　　返り値・・・入力元ファイルのファイルサイズ
　　注意・・・第一パラメータと第三パラメータは同じ値を使用しないで下さい。

Function Export Hukugoka(InpFileName As BytePtr,Password1 As BytePtr,OutFileName As BytePtr) As Long
説明:第一パラメータ・・・入力元ファイル名
　　第二パラメータ・・・復号化時のパスワード
　　第三パラメータ・・・出力先ファイル名
　　返り値・・・入力元ファイルのファイルサイズ
　　　　　　　　またはエラー値（-1）
　　注意・・・第一パラメータと第三パラメータは同じ値を使用しないで下さい。
'-------------------------------------------------------------------

*/
Function Export DllMain(hinstDLL As HINSTANCE, fdwReason As DWord, lpvReserved As VoidPtr) As Long
	'DLLエントリポイント
	Select Case fdwReason
		Case DLL_PROCESS_ATTACH
			'DLLがプロセス空間にロードされた時に実行されます。
			_System_StartupProgram()
			DllMain=1
	End Select
End Function

Function Export SetCH(CH$ As BytePtr)
	SetCH=CHC_CH(CH$,CH)
End Function

Function Pass_C(A$ As String,ByRef B(7) As Long)
	Dim I As Long
	For I=0 To 7
		B(I)=Asc(He(A$,I+1))
	Next I
End Function

Function Head(A$ As String) As Long
	Dim B$ As String
	B$=Mid$(A$,1,1)
	Head=Val(B$) As Long
End Function

Function He(A$ As String,B As Long) As String
	He=Mid$(A$,B,1)
End Function

Function CHC_CH(A$ As String,ByRef B(15) As Long) As Long
	Dim I As Long
	Dim H As Long
	CHC_CH=0
	H=Head(A$)
	if H=2 then
		For I=0 To 15
			B(I)=C62(He(A$,I*2+2))*62+C62(He(A$,I*2+3))
		Next I
		CHC_CH=1
	End If
	if H=3 then
		For I=0 To 15
			B(I)=C62(He(A$,I*3+2))*62*62+C62(He(A$,I*3+3))*62+C62(He(A$,I*3+4))
		Next I
		CHC_CH=1
	End If
	if H=4 then
		For I=0 To 15
			B(I)=C62(He(A$,I*4+2))*62*62*62+C62(He(A$,I*4+3))*62*62+C62(He(A$,I*4+4))*62+C62(He(A$,I*4+5))
		Next I
		CHC_CH=1
	End If
	if H=5 then
		For I=0 To 15
			B(I)=C62(He(A$,I*5+2))*62*62*62*62+C62(He(A$,I*5+3))*62*62*62+C62(He(A$,I*5+4))*62*62+C62(He(A$,I*5+5))*62+C62(He(A$,I*5+6))
		Next I
		CHC_CH=1
	End If
	If Len(A$)<>H*16+1 then CHC_CH=2
	CHC_CH=CHC_CH-1
End Function

Function C62(A$ As String) As Long
	Dim A As Long
		If A$="1" then A=0
		If A$="2" then A=1
		If A$="3" then A=2
		If A$="4" then A=3
		If A$="5" then A=4
		If A$="6" then A=5
		If A$="7" then A=6
		If A$="8" then A=7
		If A$="9" then A=8
		If A$="0" then A=9
		If A$="q" then A=10
		If A$="w" then A=11
		If A$="e" then A=12
		If A$="r" then A=13
		If A$="t" then A=14
		If A$="y" then A=15
		If A$="u" then A=16
		If A$="i" then A=17
		If A$="o" then A=18
		If A$="p" then A=19
		If A$="a" then A=20
		If A$="s" then A=21
		If A$="d" then A=22
		If A$="f" then A=23
		If A$="g" then A=24
		If A$="h" then A=25
		If A$="j" then A=26
		If A$="k" then A=27
		If A$="l" then A=28
		If A$="z" then A=29
		If A$="x" then A=30
		If A$="c" then A=31
		If A$="v" then A=32
		If A$="b" then A=33
		If A$="n" then A=34
		If A$="m" then A=35
		If A$="Q" then A=36
		If A$="W" then A=37
		If A$="E" then A=38
		If A$="R" then A=39
		If A$="T" then A=40
		If A$="Y" then A=41
		If A$="U" then A=42
		If A$="I" then A=43
		If A$="O" then A=44
		If A$="P" then A=45
		If A$="A" then A=46
		If A$="S" then A=47
		If A$="D" then A=48
		If A$="F" then A=49
		If A$="G" then A=50
		If A$="H" then A=51
		If A$="J" then A=52
		If A$="K" then A=53
		If A$="L" then A=54
		If A$="Z" then A=55
		If A$="X" then A=56
		If A$="C" then A=57
		If A$="V" then A=58
		If A$="B" then A=59
		If A$="N" then A=60
		If A$="M" then A=61
	C62=A
End Function

Function Export Angoka(InpFileName As BytePtr,Password As BytePtr,OutFileName As BytePtr) As Long
	Dim FileLof As Long
	Dim A As Long
	Dim A3 As Long
	Dim I As Long
	Dim A$ As String
	Dim J As Long
	Dim Head As String
	Dim HeadSize=4+8 As Byte
	Dim HeadEdit(7) As Long
	Pass_C(Password,C)
	Open InpFileName As #1
	Field #1,1
	FileLof=Lof(1)
	Open OutFileName As #2
	Field #2,4

	'ヘッダの出力
	Head="LA2"'ファイル分類
	Head=Head+Chr$(HeadSize)'ヘッダの総サイズ
	Put #2,1,Head
	Field #2,1
	For I=0 To 7
		HeadEdit(I)=Int(Rnd()*256)
		CE(I)=HeadEdit(I)
	Next I
	For I=0 To 7
		HeadEdit(I)=(HeadEdit(I)+CNext()) Mod 256
		A$=Chr$(HeadEdit(I) As Byte)
		Put #2,I+5,A$
	Next I
	For I=1 To FileLof
		Get #1,I,A$
		A=Asc(A$)
		A=(A+CNext2()) Mod 256
		A$=Chr$(A As Byte)
		J=I+HeadSize
		Put #2,J,A$
	Next I
	Close #1
	Close #2
	Angoka=FileLof
End Function

Function Export Hukugoka(InpFileName As BytePtr,Password1 As BytePtr,OutFileName As BytePtr) As Long
	Dim FileLof As Long
	Dim A As Long
	Dim A3 As Long
	Dim I As Long
	Dim A$ As String
	Dim J As Long
	Pass_C(Password1,C)
	Open InpFileName As #1
	Field #1,1
	Open OutFileName As #2
	Field #2,1
	Field #1,3
	Get #1,1,A$
	'ファイル属性のチェック
	if A$(0)=Asc("L") and A$(1)=Asc("A") and A$(2)=Asc("2") then'新版
		Field #1,12
		Get #1,1,A$
		For I=0 To 7
			CE(I)=(A$(I+4)-CNext()+65536) Mod 256
		Next I
		Field #1,1
		FileLof=Lof(1)-12
		For I=1 To FileLof
			J=I+12
			Get #1,J,A$
			A=Asc(A$)
			A=(A-CNext2()+65536) Mod 256
			A$=Chr$(A As Byte)
			Put #2,I,A$
		Next I
	Else
		Close #1
		Close #2
		Hukugoka=-1
	End If
	Close #1
	Close #2
	Hukugoka=FileLof
End Function

Function CNext() As Long
	C(0)=(C(0)+C(1)) Mod CH(0)
	C(1)=(C(1)-C(2)+CH(1)) Mod CH(1)
	C(2)=(C(2)+C(3)) Mod CH(2)
	C(3)=(C(3)-C(4)+CH(3)) Mod CH(3)
	C(4)=(C(4)+C(5)) Mod CH(4)
	C(5)=(C(5)-C(6)+CH(5)) Mod CH(5)
	C(6)=(C(6)+C(7)) Mod CH(6)
	C(7)=(C(7)-C(0)+CH(7)) Mod CH(7)
	C(0)=(C(0)-C(1)+CH(8)) Mod CH(8)
	C(1)=(C(1)+C(2)) Mod CH(9)
	C(2)=(C(2)-C(3)+CH(10)) Mod CH(10)
	C(3)=(C(3)+C(4)) Mod CH(11)
	C(4)=(C(4)-C(5)+CH(12)) Mod CH(12)
	C(5)=(C(5)+C(6)) Mod CH(13)
	C(6)=(C(6)-C(7)+CH(14)) Mod CH(14)
	C(7)=(C(7)+C(0)) Mod CH(15)
	CNext=C(0)
End Function

Function CNext2() As Long
	C(0)=(C(0)+C(1)) Mod CH(0)
	C(1)=(C(1)-C(2)+CH(1)) Mod CH(1)
	C(2)=(C(2)+C(3)) Mod CH(2)
	C(3)=(C(3)-C(4)+CH(3)) Mod CH(3)
	C(4)=(C(4)+C(5)) Mod CH(4)
	C(5)=(C(5)-C(6)+CH(5)) Mod CH(5)
	C(6)=(C(6)+C(7)) Mod CH(6)
	C(7)=(C(7)-CE(0)+CH(7)) Mod CH(7)
	CE(0)=(CE(0)+CE(1)) Mod (CH(0)+CH(1))
	CE(1)=(CE(1)-CE(2)+CH(2)+CH(3)) Mod (CH(2)+CH(3))
	CE(2)=(CE(2)+CE(3)) Mod (CH(4)+CH(5))
	CE(3)=(CE(3)-CE(4)+CH(6)+CH(7)) Mod (CH(6)+CH(7))
	C(0)=(C(0)-C(1)+CH(8)) Mod CH(8)
	C(1)=(C(1)+C(2)) Mod CH(9)
	C(2)=(C(2)-C(3)+CH(10)) Mod CH(10)
	C(3)=(C(3)+C(4)) Mod CH(11)
	C(4)=(C(4)-C(5)+CH(12)) Mod CH(12)
	C(5)=(C(5)+C(6)) Mod CH(13)
	C(6)=(C(6)-C(7)+CH(14)) Mod CH(14)
	C(7)=(C(7)+C(0)) Mod CH(15)
	CE(4)=(CE(4)+CE(5)) Mod (CH(8)+CH(9))
	CE(5)=(CE(5)-CE(6)+CH(10)+CH(11)) Mod (CH(10)+CH(11))
	CE(6)=(CE(6)+CE(7)) Mod (CH(12)+CH(13))
	CE(7)=(CE(7)-C(0)+CH(14)+CH(15)) Mod (CH(14)+CH(15))
	CNext2=C(0)
End Function