7-Zip command line -p switch is not working according to the help page

Question

I want to be able to automate the encryption of the file type .pcapng in a Windows batch script. My current problem is that I get an error when extracting the encrypted file saying something along the lines "error. Wrong Password?"

My script code:

7z a -t7z captures.7z -pINSERTPASSWORDHERE -mhe *.pcapng

The compression works as expected and this format for the -p switch was taken from 7-Zip's help page. But again the set password does not work, giving the error described above. After some playing I managed to get the code below to work... However I don't want there to be a prompt for a password; I want the password set using the value in the script.

7z a -t7z captures.7z -p INSERTPASSWORDHERE -mhe *.pcapng

Solution 1

To fully script-automate:

Create:

7z -mhc=on -mhe=on -pPasswordHere a %ZipDest% %WhatYouWantToZip%

Unzip:

7z x %ZipFile% -pPasswordHere

https://stackoverflow.com/a/39826601/3441182

Solution 2

I was having issues with the -p also. I found that I had a special character in the password and it needed to be escaped.

If you have a comma (,) or a exclamation point(!) you would need to escape the character like this:

, would be ^, and ! would be ^!

Look here for more info.

Comments

[Ярослав Рахматуллин]

There must be no space after the -p switch, otherwise the program will prompt for a password.

[RazgrizNeedsHelp]

I realize that but it was the only way I could get a set password to work. I was more so wondering why -pInsertPassword wasn't letting me open any encrypted file.

[RazgrizNeedsHelp]

To further clarify my actual password had a mix of letters of different case and numbers as well. After more testing it seems that it doesn't like a password unless its all characters or numbers.

[fixer1234]

This was moved from the question to an answer on behalf of RazgrizNeedsHelp