Extract compressed files by 7z.dll

mbnoimiDecember 1, 2011 at 4:52 PM#

Extract compressed files by 7z.dll

Hi all,

I want to extract a specific password protected *.7z file by using 7z.dll so I've to use CallInstDLL because I couldn't find any NSIS plugin.

I tried to use:

Push "x"

Push "-t7z"

Push "files.7z"

Push "-psecret"

CallInstDLL "$INSTDIR\7z.dll" "IInArchive"

but it didn't work because of these two missing points:

I don't know what's the needed 7zip function to make extract process
I'm not sure what if I called CallInstDLL correctly or it?

Could you please help me?

I read these resources but they didn't help me here:

mbnoimiDecember 6, 2011 at 9:48 AM#

Guys could you please help me here🙄

I'm googling since two days but I failed to find any result.

Afrow UKDecember 6, 2011 at 9:54 AM#

Either use the Nsis7z plug-in or execute 7za.exe using ExecDos/nsExec. CallInstDLL isn't for calling non NSIS DLL files; it's the old way to call plug-ins (before we had the plug-in call syntax). If you must use 7z.dll you have to call it using the System plug-in.

Stu

MSGDecember 6, 2011 at 9:54 AM#

I've no idea what CallInstDLL is, or what its syntax is supposed to be.

To unpack 7z files, you can use 7za.exe. It's legal to redistribute, without giving credit, for both commercial and non-profit applications.

Note however that hackers will always be able to extract the password from your installer. Either they replace the exe/dll you're calling, or they just extract the script itself.

YathoshoDecember 7, 2011 at 3:24 PM#

Originally Posted by Afrow UK View Post

Either use the Nsis7z plug-in or execute 7za.exe using ExecDos/nsExec

unfortunately, that plugin still doesn't support any advanced 7-zip options such as extracting password protected files

mbnoimiDecember 10, 2011 at 2:00 PM#

Originally Posted by Afrow UK View Post

CallInstDLL isn't for calling non NSIS DLL files; it's the old way to call plug-ins (before we had the plug-in call syntax).

In there any way for calling DLL files (other than nsis pluings) by NSIS?

LoRd_MuldeRDecember 10, 2011 at 7:30 PM#

The "System" plug-in is for exactly that purpose. It's part of the official NSIS distribution.