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software / rapidq / Examples / String & Text / Encryption / securepad20.bas

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     $INCLUDE "rapidq.inc"
     DECLARE SUB dclose
     DECLARE SUB keysetup ()
     DECLARE SUB rc4 ()
     DIM k(0 TO 255)
     DIM s(0 TO 255)
     DIM filename AS STRING
     DIM t$ AS STRING
     DIM d$ AS STRING
     DIM c$ AS STRING
     DIM pw$ AS STRING
     DIM w$ AS STRING
     DIM ja$ AS STRING
     DIM za$ AS STRING
     DIM g AS INTEGER
     DIM x AS INTEGER
     DIM y AS INTEGER
     DIM i AS INTEGER
     DIM z AS INTEGER
     DIM w AS INTEGER
     DIM fxfont AS QFONT
     fxfont.name="Arial"
     fxfont.size=10
     DIM mainform AS QFORM
     mainform.CAPTION = "Securepad v2.0 "
     mainform.Width = 700
     mainform.Height = 400
     mainform.Center
     DIM richedit AS QRICHEDIT
     richedit.PARENT=mainform
     richedit.width=mainform.clientwidth
     richedit.height=mainform.clientheight
     richedit.scrollbars=2
     richedit.align=5
     richedit.plaintext=true
     richedit.wordwrap=true
     richedit.font=fxfont
     DIM statusbar AS QSTATUSBAR
     statusbar.height=20
     statusbar.width=700
     statusbar.top=400
     statusbar.PARENT=mainform

     DIM dialogbox AS QFORM
     DIM editbox AS QEDIT
     DIM button AS QBUTTON
     dialogbox.borderstyle=bsdialog
     dialogbox.CAPTION="Password.."
     dialogbox.width=320
     dialogbox.height=76
     dialogbox.center
     editbox.PARENT=dialogbox
     editbox.top=13
     editbox.left=3
     editbox.width=257
     editbox.text=""
     editbox.passwordchar="*"
     editbox.font=fxfont
     button.PARENT=dialogbox
     button.CAPTION="&OK"
     button.top=13
     button.left=272
     button.width=27
     button.height=28
     button.onclick=dclose

     DIM mainmenu AS QMAINMENU
     mainmenu.PARENT=mainform
     DIM file AS QMENUITEM
     DIM edit AS QMENUITEM
     DIM about AS QMENUITEM
     DIM list AS QMENUITEM
     DIM new AS QMENUITEM
     DIM OPEN AS QMENUITEM
     DIM save AS QMENUITEM
     DIM saveas AS QMENUITEM
     DIM encrypt AS QMENUITEM
     DIM decrypt AS QMENUITEM
     DIM prints AS QMENUITEM
     DIM exits AS  QMENUITEM
     DIM selectall AS QMENUITEM
     DIM copy AS QMENUITEM
     DIM paste AS QMENUITEM
     DIM cut AS QMENUITEM
     DIM setfont AS QMENUITEM
     DIM clip AS QMENUITEM

     DIM popupmenu AS QPOPUPMENU
     mainform.popupmenu=popupmenu
     DIM cuts AS QMENUITEM
     cuts.CAPTION="Cut"
     DIM copys AS QMENUITEM
     copys.CAPTION="Copy"
     DIM pastes AS QMENUITEM
     pastes.CAPTION="Paste"
     DIM selectsall AS QMENUITEM
     selectsall.CAPTION="Select all"
     popupmenu.additems cuts,copys,pastes,selectsall

     SUB newclick
      richedit.clear
      mainform.CAPTION="Securepad v2.0 "+" Untitled"
      statusbar.simpletext=""
     END SUB

     SUB openclick
      statusbar.simpletext=""
      DIM opendialog AS QOPENDIALOG
      opendialog.filter="text files (*.txt)|*.txt|all files (*.*)|*.*"
      IF opendialog.EXECUTE THEN
       filename=opendialog.filename
       mainform.CAPTION="Securepad v2.0 "+" "+filename
       richedit.loadfromfile filename
      END IF
     END SUB

     SUB saveasclick
      statusbar.simpletext=""
      DIM savedialog AS QSAVEDIALOG
      savedialog.filter="text files (*.txt)|*.txt|all files (*.*)|*.*"
      IF savedialog.EXECUTE THEN
       filename=savedialog.filename
       mainform.CAPTION="Securepad v2.0 "+" "+filename
       richedit.savetofile filename
      END IF
     END SUB

     SUB exitsclick
      mainform.CLOSE
     END SUB

     SUB saveclick
      statusbar.simpletext=""
      richedit.savetofile filename
     END SUB

     SUB copyclick
      statusbar.simpletext=""
      richedit.copytoclipboard
     END SUB

     SUB pasteclick
      statusbar.simpletext=""
      richedit.pastefromclipboard
     END SUB

     SUB cutclick
      statusbar.simpletext=""
      richedit.cuttoclipboard
     END SUB

     SUB printsclick
      statusbar.simpletext=""
      statusbar.simpletext="formatting text.please wait.."
      t$=""
      printer.font=fxfont
      t$=richedit.text
      c$=""
      x=200:z=1:w=1
 aa:
      IF z>LEN(t$) THEN GOTO ww
      d$=MID$(t$,z,1):x=x+printer.textwidth(d$)
      c$=c$+d$
      IF x>(printer.pagewidth-200) THEN GOSUB align:x=200:w=z
      IF d$=CHR$(13) THEN x=200:w=z
      IF d$=CHR$(10) THEN x=200:w=z
      z=z+1
      GOTO aa
align:
      FOR l=z TO w+1 STEP-1
       IF MID$(c$,l,1)=" " THEN c$=LEFT$(c$,l-1)+CHR$(13):z=l:d$="":RETURN
      NEXT l
      c$=LEFT$(c$,z-1)+CHR$(13)
      z=z-1
      d$=""
      RETURN
 ww:
      statusbar.simpletext="now printing.."
      x=200:y=200
      printer.begindoc
      FOR i=1 TO LEN(c$)
       d$=MID$(c$,i,1)
       IF d$=CHR$(13) THEN
        d$=""
        x=200:y=y+printer.textheight(c$)
        IF y>(printer.pageheight-200) THEN
         x=200:y=200:printer.newpage
        END IF
       END IF
       IF d$=CHR$(10)THEN
       d$=""
      END IF
      printer.textout(x,y,d$,printer.font,-1)
      x=x+printer.textwidth(d$)
     NEXT i
     printer.enddoc
     statusbar.simpletext=""
     END SUB


     SUB selectallclick
      statusbar.simpletext=""
      richedit.selectall
     END SUB

     SUB dclose
      dialogbox.CLOSE
     END SUB

     SUB passwordclick
      dialogbox.SHOWMODAL
     END SUB

     SUB keysetup
      FOR i=0 TO 255
       s(i)=i
      NEXT i
      j=1
      FOR i=0 TO 255
       IF j>LEN(pw$) THEN j=1
       k(i)=ASC(MID$(pw$,j,1))
       j=j+1
      NEXT i
      j=0
      FOR i=0 TO 255
       j=(j+s(i)+k(i))MOD 256
       SWAP s(i),s(j)
      NEXT i
     END SUB

     SUB rc4
      i=0
      j=0
      FOR p=1 TO LEN(t$)
       a=ASC(MID$(t$,p,1))
       i=(i+1)MOD 256
       j=(j+s(i))MOD 256
       SWAP s(i),s(j)
       t=(s(i)+(s(j)MOD 256))MOD 256
       g=s(t)
       c=a XOR g
       w$=w$+CHR$(c)
      NEXT p
     END SUB

     SUB encryptclick
      w$="":ja$=:t$="":editbox.text=""
      passwordclick
      pw$=editbox.text
      IF pw$="" THEN EXIT SUB
      keysetup
      t$=richedit.text
      statusbar.simpletext="please wait..."
      rc4
      FOR ta=1 TO LEN(w$)
       ta$=MID$(w$,ta,1)
       za$=STR$(ASC(ta$))
       IF LEN(za$)=1 THEN za$="00"+za$
       IF LEN(za$)=2 THEN za$="0"+za$
       IF LEN(za$)=3 THEN za$=za$
       ja$=ja$+za$
      NEXT ta
      richedit.text=ja$
      statusbar.simpletext="file encrypted"
     END SUB

     SUB decryptclick
      w$="":ja$="":t$="":editbox.text=""
      passwordclick
      pw$=editbox.text
      IF pw$="" THEN EXIT SUB
      keysetup
      ja$=richedit.text
      statusbar.simpletext="please wait..."
      FOR ta=1 TO LEN(ja$) STEP 3
       ta$=MID$(ja$,ta,3)
       za$=CHR$(VAL(ta$))
       t$=t$+za$
      NEXT ta
      rc4
      richedit.text=w$
      statusbar.simpletext="file decrypted"
     END SUB

     SUB setfontclick
      DIM fontdialog AS QFONTDIALOG
      fontdialog.getfont(fxfont)
      IF fontdialog.EXECUTE=true THEN
       fontdialog.setfont(fxfont)
       richedit.font=fxfont
      END IF
     END SUB

     SUB clipclick
      statusbar.simpletext=""
      clipboard.clear
     END SUB

     file.CAPTION="&File"
     edit.CAPTION="&Edit"
     about.CAPTION="&About"
     mainmenu.additems file,edit,about
     new.CAPTION="&New"
     OPEN.CAPTION="&Open"
     save.CAPTION="&Save"
     saveas.CAPTION="&Save as.."
     encrypt.CAPTION="&Encrypt"
     decrypt.CAPTION="&Decrypt"
     prints.CAPTION="&Print"
     exits.CAPTION="&Exit"
     file.additems new,OPEN,save,saveas,encrypt,decrypt,prints,exits
     list.CAPTION="&By S.Boukas (c)2006"
     about.additems list
     copy.CAPTION="&Copy"
     paste.CAPTION="&Paste"
     cut.CAPTION="&Cut"
     selectall.CAPTION="&Select All"
     setfont.CAPTION="&Set font"
     clip.CAPTION="&Clear clipboard"
     edit.additems copy,paste,cut,selectall,setfont,clip

     new.onclick=newclick
     OPEN.onclick=openclick
     save.onclick=saveclick
     saveas.onclick=saveasclick
     exits.onclick=exitsclick
     encrypt.onclick=encryptclick
     decrypt.onclick=decryptclick
     prints.onclick=printsclick
     copy.onclick=copyclick
     paste.onclick=pasteclick
     cut.onclick=cutclick
     selectall.onclick=selectallclick
     setfont.onclick=setfontclick
     clip.onclick=clipclick
     cuts.onclick=cutclick
     copys.onclick=copyclick
     pastes.onclick=pasteclick
     selectsall.onclick=selectallclick

     MAINFORM.SHOWMODAL


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© Tue 2019-4-23  Guidance Laboratory Inc.
Email:webmaster1g.yi.org Hits:0 Last modified:2013-06-19 07:51:06