我正在尝试编写代码以对汇编中的文件进行加密。该代码将处理文本文件的字节（直到找到0），创建具有相同名称的新文件（并删除第一个文件），加密每个字节并将其写入新文件。
在添加加密之前，我试图复制一个包含1234的文件并将其写入新文件1234，但是它不起作用。我正在使用tasm。
IDEAL
MODEL small
STACK 100h
DATASEG
;-----------DATA------------;
buffer dw 100 dup (?)
readCounter dw 0
byte0 dw ?
byte1 dw ?
handle dw ?
fileName db "textFile.txt",0
fileNameLength db ?
fileNameQ db 10,13,"What is the file's name?$"
fileNameLengthQ db 10,13,"How many letters are in your file's name?$"
ErrNum db 10,13,"error number:$"
CreateErrMsg db 10,13,"error creating new file$"
CloseErrMsg db 10,13,"error closing file$"
OpenErrMsg db 10,13,"error opening file$"
ReadErrMsg db 10,13,"error reading file$"
WriteErrMsg db 10,13,"error reading file$"
;-----------/DATA------------;
CODESEG
;---------------------------------------------------------------METHODS-------------------------------------------------------------------;
;-----------/MAIN------------;
proc main
;call getFileName
call openFile
call readFile
call createFile
call writeFile
call closeFile
ret
endp main
;-----------/MAIN------------;
;-----------GET FILE NAME------------;
;proc getFileName
;push ax
;push bx
;push cx
;push dx
;pop dx
;pop cx
;pop bx
;pop ax
;ret
;endp getFileName
;-----------/GET FILE NAME------------;
;-----------TERMINATE------------;
proc terminate
mov ax,4c00h
int 21h
ret
endp terminate
;-----------/TERMINATE------------;
;-----------OPEN FILE------------;
proc openFile
push ax
push bx
push cx
push dx
mov ah,3Dh
mov al,2
mov cx,1
lea dx,[filename]
int 21h
jc openError
mov [handle],ax
jmp finishOpen
openError:
add ax,'0'
mov [byte0],ax
mov ah,9
mov dx, offset OpenErrMsg
int 21h
mov ah,2
mov dx,0
int 21h
mov ah,2
mov dx,'('
int 21h
mov ah,2
mov dx,[byte0]
int 21h
mov ah,2
mov dx,')'
int 21h
call terminate
finishOpen:
pop dx
pop cx
pop bx
pop ax
ret
endp openFile
;-----------/OPEN FILE------------;
;-----------READ FILE------------;
proc readFile
push ax
push bx
push cx
push dx
xor si,si
mov bp,[buffer]
jmp read
mov ah,42h
mov bx,[handle]
mov al,0
mov cx,0
mov dx,0
int 21h
readLoop:
add [readCounter],2
add si,2
read:
mov ah,3fh
mov bx,[handle]
mov cx,1
mov dx,bp
add dx,si
int 21h
jc readError
mov bx,[buffer+si]
cmp bx,0
je finishRead
jmp readLoop
readError:
add ax,'0'
mov [byte0],ax
mov ah,9
mov dx, offset ReadErrMsg
int 21h
mov ah,2
mov dx,0
int 21h
mov ah,2
mov dx,'('
int 21h
mov ah,2
mov dx,[byte0]
int 21h
mov ah,2
mov dx,')'
int 21h
call terminate
finishRead:
pop dx
pop cx
pop bx
pop ax
ret
endp readFile
;-----------/READ FILE------------;
;-----------CREATE FILE------------;
proc createFile
push ax
push bx
push cx
push dx
mov ah,3ch
mov cl,2
lea dx,[filename]
int 21h
jc CreateError
mov [handle],ax
jmp finishCreate
CreateError:
add ax,'0'
mov [byte0],ax
mov ah,9
mov dx, offset CreateErrMsg
int 21h
mov ah,2
mov dx,0
int 21h
mov ah,2
mov dx,'('
int 21h
mov ah,2
mov dx,[byte0]
int 21h
mov ah,2
mov dx,')'
int 21h
call terminate
finishCreate:
pop dx
pop cx
pop bx
pop ax
ret
endp createFile
;-----------/CREATE FILE------------;
;------------ENCRYPTE--------------;
proc encrypte
push ax
push bx
push cx
push dx
mov ax,[byte0]
xor ax,50
mov [byte0],ax
pop dx
pop cx
pop bx
pop ax
ret
endp encrypte
;-----------/ENCRYPTE---------------;
;-----------WRITE FILE------------;
proc writeFile
push ax
push bx
push cx
push dx
xor si,si
mov bp,[buffer]
jmp write
writeLoop:
add si,2
write:
mov dx,[buffer+si]
mov [byte0],dx
;call encrypte
mov dx,[byte0]
mov ah,40h
mov al,0
mov bx,[handle]
mov cx,1
mov dx,[byte0]
int 21h
cmp si,[readCounter]
jne writeLoop
jmp finishWrite
writeError:
add ax,'0'
mov [byte0],ax
mov ah,9
mov dx, offset WriteErrMsg
int 21h
mov ah,2
mov dx,0
int 21h
mov ah,2
mov dx,'('
int 21h
mov ah,2
mov dx,[byte0]
int 21h
mov ah,2
mov dx,')'
int 21h
call terminate
finishWrite:
pop dx
pop cx
pop bx
pop ax
ret
endp writeFile
;-----------/WRITE FILE------------;
;-----------CLOSE FILE------------;
proc closeFile
push ax
push bx
push cx
push dx
mov ah,3eh
mov cx,1
lea dx,[filename]
int 21h
jc closeError
mov [handle],ax
jmp finishClose
closeError:
add ax,'0'
mov [byte0],ax
mov ah,9
mov dx, offset CloseErrMsg
int 21h
mov ah,2
mov dx,0
int 21h
mov ah,2
mov dx,'('
int 21h
mov ah,2
mov dx,[byte0]
int 21h
mov ah,2
mov dx,')'
int 21h
call terminate
finishClose:
pop dx
pop cx
pop bx
pop ax
ret
endp closeFile
;-----------/CLOSE FILE------------;
;---------------------------------------------------------------START-------------------------------------------------------------------;
;------------START-----------;
start:
mov ax,@data
mov ds,ax
mov bp,sp
call main
;------------/START-----------;
;-----------END---------------;
exit:
mov ax,4c00h
int 21h
end start
text file before running the program text file after running program
