DDR爱好者之家 Design By 杰米

1. The thing I used this for wad to decode and encode BASE64 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 base64 file.And it prints decoded file in lines with max length of 64 symbols.
So here are two very very very simple scripts that use certutil to decode and encode base64 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:

@echo off
setlocal
for /f "delims== tokens=1" %%A in ('type %1') do (
	set encoded=%%A
)
rem two additional lines are needed by certutil
echo -----BEGIN CERTIFICATE-----> %2.tmp
echo %encoded%%2.tmp
echo -----END CERTIFICATE----- %2.tmp


certutil /decode %2.tmp %2
del /S /Q %2.tmp
endlocal

encode:

@echo off
setlocal
certutil /encode %1 %1.encoded
rem create an empty file
break > %2

setlocal ENABLEDELAYEDEXPANSION
(
	for /f "eol=-" %%A in (' type %1.encoded ') do (
		rem this not works - left an empty spaxes after each line from typed file
		rem null< (set /p #=%%A) %1.encoded
		
		set result=!result!%%A
	)
)
endlocal & set result=%result%
echo %result% %2%
del /S /Q
endlocal

The bad thing is that the base64 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:

复制代码 代码如下:
0000 73 65 74 20 78 3d 15 0d  0a 73 65 74 20 79 3d 12   set x=...set y=.
0010 0d 0a 65 63 68 6f 20 2a  2a 25 78 25 25 79 25 2a   ..echo **%x%%y%*
0020 2a    

(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 :

0000 65 63 68 6f 20 07
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):
0000 73 65 74 20 78 3d 15 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

DDR爱好者之家 Design By 杰米
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DDR爱好者之家 Design By 杰米

RTX 5090要首发 性能要翻倍!三星展示GDDR7显存

三星在GTC上展示了专为下一代游戏GPU设计的GDDR7内存。

首次推出的GDDR7内存模块密度为16GB,每个模块容量为2GB。其速度预设为32 Gbps(PAM3),但也可以降至28 Gbps,以提高产量和初始阶段的整体性能和成本效益。

据三星表示,GDDR7内存的能效将提高20%,同时工作电压仅为1.1V,低于标准的1.2V。通过采用更新的封装材料和优化的电路设计,使得在高速运行时的发热量降低,GDDR7的热阻比GDDR6降低了70%。