ubikom
quickjs-emscripten
ubikom | quickjs-emscripten | |
---|---|---|
6 | 21 | |
65 | 1,130 | |
- | - | |
8.1 | 9.4 | |
6 months ago | 24 days ago | |
Go | TypeScript | |
MIT License | GNU General Public License v3.0 or later |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
ubikom
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em client issues?
Excellent client, btw. I have an issue open regarding this, but when I tried it seems to work fine. The client autoconfigured itself. If you are having issues with em client, please PM me or comment on the issue here: https://github.com/regnull/ubikom/issues/58
- Ubikom - Decentralized E2EE email service
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Check out our web mail (experimental!)
Thanks for reporting the issue. You can track it here: https://github.com/regnull/ubikom/issues/54
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Ask HN: Who Wants to Collaborate?
I'm working on https://ubikom.cc, end-to-end encrypted email service based on the concept of self-sovereign identity. Basically, you keep the encryption key, and all your messages are encrypted, on the wire or at rest. The core platform is open-source, the code is available here: https://github.com/regnull/ubikom
Billions of users use GMail (or similar services). These companies are making money by selling ads, and their "free" email service is just another way to improve ad targeting. Furthermore, your account can be disabled at any time and for any reason. Sure, you can switch to Protonmail, Tutanota, etc. because they are "good" companies. But why do you have to trust to any of them? Keep your encryption key, and have communication providers move around encrypted bytes on your behalf. Store your identity on a blockchain (maybe), so that no one can take it away.
That's the idea. If you'd like to work on something like this, get in touch. lgx (at) ubikom.cc
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Court rules encrypted email provider Tutanota must monitor messages
Shameless plug time! I'm working on 100% encrypted/authenticated email based on Self-Sovereign Identity and decentralized key registry, check it out at https://github.com/regnull/ubikom
- Encrypted email service based on decentralized private identity
quickjs-emscripten
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New QuickJS Release
Based on your comment below I think you figured out the difference - but if you're looking to execute JS, you can pick between ShadowRealm (where available, or using a polyfill) or my library quickjs-emscripten.
Pros of quickjs-emscripten over ShadowRealm:
- You can use quickjs today in any browser with WASM. ShadowRealm isn't available yet, and polyfills have had security issues in the past. See https://www.figma.com/blog/an-update-on-plugin-security/
- In ShadowRealm eval, untrusted code can consume arbitrary CPU cycles. With QuickJS, you can control the CPU time used during an `eval` using an [interrupt handler] that's called periodically during the eval.
- In ShadowRealm eval, untrusted code can allocate arbitrary amounts of memory. With QuickJS, you can control both the [stack size] and the [heap size] available inside the runtime.
- quickjs-emscripten can do interesting things with custom module loaders and facades that allow synchronous code inside the runtime to call async code on the host.
Pros of ShadowRealm over QuickJS:
- ShadowRealm will (presumably?) execute code using your native runtime, probably v8, JavaScriptCore, or SpiderMonkey. Quickjs is orders of magnitude slower than JIT'd javascript performance of v8 etc. It's also slower than v8/JSC's interpreters, although not by a huge amount. See [benchmarks] from 2019.
- You can easily call and pass values to ShadowRealm imported functions. Talking to quickjs-emscripten guest code requires a lot of fiddly and manual object building.
- Overall the quickjs(-emscripten) API is verbose, and requires manual memory management of references to values inside the quickjs runtime.
[interrupt handler]: https://github.com/justjake/quickjs-emscripten/blob/main/doc...
[stack size]: https://github.com/justjake/quickjs-emscripten/blob/main/doc...
[heap size]: https://github.com/justjake/quickjs-emscripten/blob/main/doc...
[benchmarks]: https://bellard.org/quickjs/bench.html
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Extism Makes WebAssembly Easy
The thing I want to achieve with WebAssembly is still proving a lot harder than I had anticipated.
I want to be able to take strings of untrusted code provided by users and execute them in a safe sandbox.
I have all sorts of things I want this for - think custom templates for a web application, custom workflow automation scripts (Zapier-style), running transformations against JSON data.
When you're dealing with untrusted code you need a really robust sandbox. WebAssembly really should be that sandbox.
I'd like to support Python, JavaScript and maybe other languages too. I want to take a user-provided string of code in one of those languages and execute that in a sandbox with a strict limit on both memory usage and time taken (so I can't be crashed by a "while True" loop). If memory or time limit are exceeded, I want to get an exception which I can catch and return an error message to the user.
I've been exploring options for this for quite a while now. The furthest I've got was running Pyodide inside of Deno: https://til.simonwillison.net/deno/pyodide-sandbox
Surprisingly I've not found a good pattern for running a JavaScript interpreter in a WASM sandbox yet. https://github.com/justjake/quickjs-emscripten looks promising but I've not found the right recipe to call it from server-side Python or Deno yet.
Can Extism help with this? I'm confident I'm not the only person who's looking for a solution here!
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Node on Web. Use Nodejs freely in your browser with Linux infrastructure.
"Safely execute untrusted Javascript in your Javascript, and execute synchronous code that uses async functions" quickjs-emscripten, NPM
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Sandboxing JavaScript Code
This maybe, as a start?
https://github.com/justjake/quickjs-emscripten
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Hacker News top posts: Nov 20, 2022
QuickJS Running in WebAssembly\ (17 comments)
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QuickJS Running in WebAssembly
The library was inspired by Figma’s blog posts about their plug-in system: https://github.com/justjake/quickjs-emscripten#background
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Show HN: Run unsafe user generated JavaScript in the browser
If you need to call into user-generated Javascript synchronously or have greater control over the sandbox environment, you can use WebAssembly to run a Javascript interpreter: https://github.com/justjake/quickjs-emscripten#quickjs-emscr...
QuickJS in WebAssembly is much slower than your browser's native Javascript runtime, but possibly faster than async calls using postMessage. As an added bonus, it can make async functions in the host appear to be synchronous inside the sandbox using asyncify: https://emscripten.org/docs/porting/asyncify.html.
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Why Would Anyone Need JavaScript Generator Functions?
You can use One Weird Trick with generator functions to make your code "generic" over synchronicity. I use this technique to avoid needing to implement both sync and async versions of some functions in my quickjs-emscripten library.
The great part about this technique as a library author is that unlike choosing to use a Promise return type, this technique is invisible in my public API. I can write a function like `export function coolAlgorithm(getData: (request: I) => O | Promise): R | Promise`, and we get automatic performance improvement if the user's function happens to return synchronously, without mystery generator stuff showing up in the function signature.
Helper to make a function that can be either sync or async: https://github.com/justjake/quickjs-emscripten/blob/ff211447...
Uses: https://cs.github.com/justjake/quickjs-emscripten?q=yield*+l...
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Why Am I Excited About WebAssembly?
This seems like a pretty nice, recently enabled way of getting a sandboxed js environment: QuickJS compiled to WASM: https://github.com/justjake/quickjs-emscripten.
What are some alternatives?
SnapKit - A Java UI toolkit
wasmtime - A fast and secure runtime for WebAssembly
NATS - High-Performance server for NATS.io, the cloud and edge native messaging system.
wasmer - 🚀 The leading Wasm Runtime supporting WASIX, WASI and Emscripten
futurecoder - 100% free and interactive Python course for beginners
wizer - The WebAssembly Pre-Initializer
coughdrop - Open source web-based AAC app
rr - Record and Replay Framework
awayto - Awayto is a curated development platform, producing great value with minimal investment. With all the ways there are to reach a solution, it's important to understand the landscape of tools to use.
go - The Go programming language
http-add-on - Add-on for KEDA to scale HTTP workloads
iPlug2 - C++ Audio Plug-in Framework for desktop, mobile and web