Question

我需要从同一批处理文件中生成的文件列表生成带有哈希文件标记的文件。这是我到目前为止的代码：

@echo off
setlocal enabledelayedexpansion

:: Set the variables for this script.
set testfolder=c:\test\test folder
set listfile=c:\test\output\file list.txt
set hashfile=c:\test\output\hashes.txt

:: Delete any of the files that were created the last time this script was ran.
del "%hashfile%"
del "%listfile%"
cls

:: Generate a file with a list of all of the files (with path) in designated folder and subdirectories.
:: Directory and subdirectory names are not included in the list. Only files.
dir /s /b /a-d "%testfolder%" > "%listfile%"

:: Assign each line of the file above to its own variable.
set counter=1
for /f "usebackq delims=" %%x in ("%listfile%") do (
  set "line_!counter!=%%x"
  set /a counter+=1
)

:: Count the number of lines in the above file to use as a reference point.
set /a numlines=counter - 1

:: Generate an MD5 hash for each variable and write it to a file with a blank space between each.
for /l %%x in (1,1,%numlines%) do (
  certutil -hashfile "!line_%%x!" MD5 >> "%hashfile%"
  echo( >> "%hashfile%"
)
eof

对于我为其生成哈希文件的大多数文件，我得到类似的内容：

MD5 hash of file c:\test\test folder\Citrix 2.bmp:
31 34 d6 04 cd b0 4b ef a7 63 c3 e9 ae a8 3d 01
CertUtil: -hashfile command completed successfully.

但有时我会收到如下错误：

CertUtil: -hashfile command FAILED: 0x800703ee (WIN32: 1006)
CertUtil: The volume for a file has been externally altered so that the opened file is no longer valid.

为什么有些文件会出现此错误？
如何删除任何以 CertUtil：开头的行，这样我就没有不必要的行，或者只能将CertUtil命令的前2行写入文件
在%hashfile%处于最终形式之后，我想运行certutil -hashfile "%hashfile% MD5并仅将哈希码分配给变量。这是什么语法？

Answer 1

略微修改的代码段显示仅{strong>零长度文件的0x800703ee (WIN32: 1006 ERROR_FILE_INVALID)错误消息（参见rem条评论）。

:: Generate an MD5 hash for each variable and write it to a file with a blank line...
>"%hashfile%" (
  for /l %%x in (1,1,%numlines%) do (

        rem debugging: show file length for each file
    for %%G in ("!line_%%x!") do echo(%%~zG "%%~G"

        rem operational: skip certutil for zero length files (requires elaboration)   
    certutil -hashfile "!line_%%x!" MD5
    echo(
  )
)

请参阅Command Line arguments (Parameters)了解%%~zG和"%%~G"解释。

Answer 2

IMO使用find / v / N＆＃34;＆＃34;

可以更轻松地完成批处理中的计数步骤

for /f "tokens=3 delims=: " %%A in (
  'find /V /N /C "" %listfile%'
) Do set NumLines=%%A

但是，每次运行批处理时都会重新创建列表和哈希文件，中间步骤根本不需要。
这个堆叠for - if - for将在一次运行中完成：

@echo off
setlocal enabledelayedexpansion

:: Set the variables for this script.
set testfolder=c:\test\test folder
set hashfile=c:\test\output\md5-hashes.csv

>%hashfile% (
  echo "File","MD5-hash"
  For /f "delims=" %%A in (
    'dir /s /b /a-d "%testfolder%"'
  ) Do If %%~sA Gtr 0 For /f "delims=" %%B in (
    'certutil -hashfile %%A MD5 ^|findstr /i ^[0-9a-f][0-9a-f].[0-9a-f][0-9a-f].[0-9a-f][0-9a-f]'
  ) Do Echo:"%%~A","%%~B"
)

这个部分输出恰好引用了一个更适合这个任务的工具： - ）

> type md5-hashes.csv
"File","MD5-hash"
"c:\test\md5\hashdeep.exe","23 03 ea 53 52 03 c7 93 05 49 0d 6c 20 be 84 54"
"c:\test\md5\hashdeep64.exe","66 5c cc 57 a8 4c 56 39 c4 e5 15 16 86 cc 04 32"
"c:\test\md5\md5deep.exe","23 03 ea 53 52 03 c7 93 05 49 0d 6c 20 be 84 54"
"c:\test\md5\md5deep64.exe","66 5c cc 57 a8 4c 56 39 c4 e5 15 16 86 cc 04 32"

CertUtil -hashfile输出到文件和错误处理

2 个答案: