I try to reverse engineer a backup routine, because the existing routine is single-threaded and there are no updates coming soon. I want to use existing methods instead of creating new ones, so i tried 7zip command line tool. The backup routing creates more or less a zip file encrypted with AES-256 Deflate and creates a CRC for every file in the archive.
What I tried so far:
7za.exe a -mem=AES256 -scrcCRC32 -p backup.zip anyFolder
also tried to include the hash with:
7za.exe h backup.zip -ir*
but i get error: Too SHort Switch: r*
Here you can see a part of the file Info from "7za.exe l -slt backup.zip"
...
Encrypted = +
CRC = 086A8F3F
Method = AES-256 Deflate
...
My created backup.zip looks like this:
...
Encrypted = +
CRC =
Method = AES-256 Deflate
...
So I need the CRC to be filled (with CRC32), i dont care if it creates it with the initial command or with a second command. The first results show about 5x faster backup, I look forward for your replies!