Just take the string as bytes and hash it ffs
this post was submitted on 26 Aug 2024
460 points (95.5% liked)
Mildly Infuriating
35552 readers
920 users here now
Home to all things "Mildly Infuriating" Not infuriating, not enraging. Mildly Infuriating. All posts should reflect that.
I want my day mildly ruined, not completely ruined. Please remember to refrain from reposting old content. If you post a post from reddit it is good practice to include a link and credit the OP. I'm not about stealing content!
It's just good to get something in this website for casual viewing whilst refreshing original content is added overtime.
Rules:
1. Be Respectful
Refrain from using harmful language pertaining to a protected characteristic: e.g. race, gender, sexuality, disability or religion.
Refrain from being argumentative when responding or commenting to posts/replies. Personal attacks are not welcome here.
...
2. No Illegal Content
Content that violates the law. Any post/comment found to be in breach of common law will be removed and given to the authorities if required.
That means: -No promoting violence/threats against any individuals
-No CSA content or Revenge Porn
-No sharing private/personal information (Doxxing)
...
3. No Spam
Posting the same post, no matter the intent is against the rules.
-If you have posted content, please refrain from re-posting said content within this community.
-Do not spam posts with intent to harass, annoy, bully, advertise, scam or harm this community.
-No posting Scams/Advertisements/Phishing Links/IP Grabbers
-No Bots, Bots will be banned from the community.
...
4. No Porn/Explicit
Content
-Do not post explicit content. Lemmy.World is not the instance for NSFW content.
-Do not post Gore or Shock Content.
...
5. No Enciting Harassment,
Brigading, Doxxing or Witch Hunts
-Do not Brigade other Communities
-No calls to action against other communities/users within Lemmy or outside of Lemmy.
-No Witch Hunts against users/communities.
-No content that harasses members within or outside of the community.
...
6. NSFW should be behind NSFW tags.
-Content that is NSFW should be behind NSFW tags.
-Content that might be distressing should be kept behind NSFW tags.
...
7. Content should match the theme of this community.
-Content should be Mildly infuriating.
-At this time we permit content that is infuriating until an infuriating community is made available.
...
8. Reposting of Reddit content is permitted, try to credit the OC.
-Please consider crediting the OC when reposting content. A name of the user or a link to the original post is sufficient.
...
...
Also check out:
Partnered Communities:
Reach out to LillianVS for inclusion on the sidebar.
All communities included on the sidebar are to be made in compliance with the instance rules.
founded 1 year ago
MODERATORS
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
That would be completely based on the hash being used. In the example above I showed SHA512 which is 64Bytes. If we're using ASCII (7 bit per character) as our input then 64 Bytes is just over 73(73.1428...) characters. After that you're losing data in the hashing process and by that effect it would be negligible... (There's some wiggle room here in that we can't type hidden ASCII characters so some passwords over 73 characters would fill those spaces... but detecting collisions is silly and non-trivial... better to just not worry about those at all.)
Extended ASCII would be same premise, just 64 characters instead of 73.
The reality is that nobody is using much more than 64 Bytes for their hashing algorithm for passwords... 64 characters is a good number to max out most of them. Databases don't need to store much at all regardless of the length of your actual password. If you're developing an app you can set the database to limit based on the algorithms you're using. If you have no idea what the web-dev will actually use... then 128 characters on the database field is probably pretty safe (88 I think if storing as Base64, 128 if storing in Hex. Could be off by one here.) and literally trivial to store. The point being that even if every one of your users submitted 10000 character long passwords... that's irrelevant and trivial for storage as hashes.
There's a more practical limit. Using US standard keyboard symbols, a 40 char password is about as secure as a 256-bit block cipher key. That's impossible to break due to thermodynamic limits on computing.
The reason to put a high char limit is to mitigate DoS attacks. It can still be a few hundred chars.