nbperf
libu8ident
| nbperf | libu8ident | |
|---|---|---|
| 2 | 9 | |
| 13 | 17 | |
| - | - | |
| 0.0 | 1.8 | |
| about 1 year ago | 11 months ago | |
| C | C | |
| GNU General Public License v3.0 or later | Apache License 2.0 |
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nbperf
libu8ident
- Roaring bitmaps are compressed bitmaps, can be 100x faster
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International domain names: where does HTTPS://meßagefactory.ca lead you?
In programming languages it's much worse. Identifiers can either be unidentifiable, and if so everybody has a different opinion what "identifiable" means. Even the standard on identifiers, UTF-39, is buggy and has too many interpretations, leading to a complete disaster. https://github.com/rurban/libu8ident/blob/master/doc/c11.md
In punycode domain names it's quite simple still.
With other names, it's even worse. No-one cares. Linkers do not, username and filesystem drivers do not. The Apple HFS+ did care a bit one day, until someone in the higher ranks decided that no-one needs unicode security anymore and switched the new APFS to unsafe again.
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Using Unicode in a compiler
No, it's definitely not safe to use unrestricted Unicode in a compiler. See https://github.com/rurban/libu8ident/ for identifier rules, and http://www.unicode.org/reports/tr55/ for much worse problems.
- Ask HN: What interesting problems are you working on? ( 2022 Edition)
- Unicode Utilities: Confusables
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How can you be fooled by the U+202E trick?
That's why unicode published the security guidelines and mechanisms to avoid such attacks. In 2004 already.
The problem is that nobody cared. Browsers invented punycode instead of following tr39, email ditto. But ok, at least something. Java did it, cperl did, rust did it.
Everybody else is vulnerable. Esp. most other programming languages, filesystems and login systems. https://github.com/rurban/libu8ident/blob/master/doc/c11.md
- Prevent Trojan Source attacks with GCC 12
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Unicode Normalization Forms: When ö = ö
I'm maintaining such a library.
coreutils, diff, grep, patch, sed and friends all cannot find Unicode strings, they have no string support. They can only mimic filesystems, finding binary garbage. Strings are so rthi g different than pure ASCII or BINARY garbage. Strings have an encoding and are Unicode.
Filesystems are even worse because they need to treat filenames as identifiers, but do not. Nobody cares about TR31, TR39, TR36 and so on.
Here is an overview of the sad state of Unicode unsafeties in programming languages: https://github.com/rurban/libu8ident/blob/master/c11.md
- Why does Windows 10 run faster than Fedora?
What are some alternatives?
sdcv
Confusables - Simple library for matching a string to another string that is same but has letters that only *look* the same as original string
ebook-reader-dict - Finally decent dictionaries based on Wiktionary for your beloved eBook reader.
featurebase - A crazy fast analytical database, built on bitmaps. Perfect for ML applications. Learn more at: http://docs.featurebase.com/. Start a Docker instance: https://hub.docker.com/r/featurebasedb/featurebase
matano - Open source security data lake for threat hunting, detection & response, and cybersecurity analytics at petabyte scale on AWS
libredwg - Official mirror of libredwg. With CI hooks and nightly releases. PR's ok
multiview - 3D computer vision and action recognition research library
safeclib - safec libc extension with all C11 Annex K functions
preemptible-thread - How to preempt threads in user space
reals - A lightweight python3 library for arithmetic with real numbers.
studio - Robotics visualization and debugging
ts-pg-orm - Delightful Typescript PostgreSQL ORM