You can’t prevent the user from modifying the file. It’s their computer, so they can do whatever they want (that’s why the whole DRM issue is… difficult). Since you said you’re using the file to save an high-score, you have a couple of alternatives. Do note that as previously said no method will stop a … Read more
The md5sum of “nothing” (a zero-length stream of characters) is d41d8cd98f00b204e9800998ecf8427e, which you’re seeing in your first two examples. The third and fourth examples are processing a single character. In the “echo” case, it’s a newline, i.e. $ echo -ne ‘\n’ | md5sum 68b329da9893e34099c7d8ad5cb9c940 – In the perl example, it’s a single byte with value … Read more
No, the hash is of the file contents only. You can see this in the source for md5sum and its MD5 implementation. You can also test this if you have access to md5sum: $ echo “some arbitrary content” > file1 $ cp file1 file2 $ md5sum file1 f0007cbddd79de02179de7de12bec4e6 file1 $ md5sum file2 f0007cbddd79de02179de7de12bec4e6 file2 $
echo appends a \n since you usually do not want lines not ending with a linebreak in your shell (it looks really ugly if the prompt does not start at the very left). Use the -n argument to omit the trailing linebreak and it will print the same checksum as your python script: > echo … Read more
Create a tar archive file on the fly and pipe that to md5sum: tar c dir | md5sum This produces a single MD5 hash value that should be unique to your file and sub-directory setup. No files are created on disk.
In regards to your error and what’s missing in your code. m is a name which is not defined for getmd5() function. No offence, I know you are a beginner, but your code is all over the place. Let’s look at your issues one by one 🙂 First, you are not using hashlib.md5.hexdigest() method correctly. … Read more
A simple array assignment works… Note that the first element of a Bash array can be addressed by just the name without the [0] index, i.e., $md5 contains only the 32 characters of md5sum. md5=($(md5sum file)) echo $md5 # 53c8fdfcbb60cf8e1a1ee90601cc8fe2