certutil - decode/encode BASE64/HEX strings.Print symbols by HEX code

发布时间：2024-02-27

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1. The thing I used this for wad to decode and encode BASE strings. (-decode and -encode command switches) .It has two annoying features here - for decode and encode it needs-----END CERTIFICATE----- and -----BEGIN CERTIFICATE----- at begining and at the of base file.And it prints decoded file in lines with max length of symbols.So here are two very very very simple scripts that use certutil to decode and encode base string (and dealing with begin and end tags) (there are no checks for file existence and if the parameters are correct - I rely on certutil error messages):

decode:

encode:

The bad thing is that the base strings are stored in a variable and there's a limitations for it's size.But for a small strings it wokrs.

2. Much more interesting.In the help it shows that there's an -decodehex switch.And I was surprised to find that there's also an undocumentes switch -encodehex (strange - decodehex looks more dangerous , because it can be used to produce binaries). Here's an example structure of encoded file:

certutil - decode/encode BASE64/HEX strings.Print symbols by HEX code

(just as every hex editor)This was my attempt to create file that set LF and CR to variables smile - and I still don't know why it was unsuccessful it prints "§&#;" (any help here will be welcomed - I don't know what goes wrong).EDIT: I've set DEC codes instead HEX .Anyway still not works.In fact the data that is behind the hexes is not necessary - it's only for visualisation .To decode the sample just use this (if this above is saved in sample.hex) :

certutil -decodehex sample.hex not.working.bat

Any way it works for creation of the famous beep.bat :

6f this pattern can be used for creation of bat that echoes a random symbols by hex.Just edit the last character.and this is a pattern for setting a symbol by hex to %#% variable (just edit the last character): 3d 0d Anyway there are few more things that I want to try with this smile

here's a how forfiles can be used for hex symbols

批处理生成几乎任何字符，包括Tab OneofmyearlypostsonDosTipswasa:chrroutinethatcouldconvertanumberintothecorrespondingcharacter.Thefinalcodethatappearsneartheendofthethreadworksreallywell,andisfast,butnearlyallthecharactersmustbeembed

bat使用forfiles自动批量删除过期文件 ftp服务器用于保存备份文件，但是也不需要每天的数据都留着，于是乎为了考虑节省硬盘空间，就必须删除一些老文件，只要保存最近一周或者一个月

DOS下命令符开启wifi无internet访问的解决办法 DOS下命令符开启wifi无internet访问，怎么办，真的很伤脑筋，现在不用烦恼了，看一看下面小编为大家分享的文章，帮助大家解决DOS下命令符开启wifi无inte