alt Hacker NewsI built a bad clone of Charles Proxy over the summer as part of another project (iOS VPN -> mitm with custom root certificate -> logging). It's surprisingly simple. It basically goes App -> Packet tunnel -> SOCKS -> a child process (I used https://github.com/AdguardTeam/gomitmproxy) to handle the sniffing and reencryption.
Did post the source somewhere at some point but my git server got corrupted and I haven't gone and fixed it. https://github.com/acheong08/apple-corelocation-experiments/...
I wonder if AI is good enough to vibe code my horrible hacks into a full clone of Charles Proxy these days.
Annoying fact: Apple requires you to have a paid developer account to access the Packet Tunnel APIs. You can't even test it in XCode simulator because of how networking works in there. It's insane that I can't even develop for my own phone without paying an extra fee to Apple. The error message when you sideload without a paid account doesn't make it obvious at all and it took me a good day or two before realizing .
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I do a lot of work in similar areas here.
While vibe coding will get you something that potentially works, I've noticed LLMs are really bad at cleanly abstracting across multiple layers in this area. They usually will insist on parsing and serializing every field at every layer.
If you have the protocols/interfaces well defined up front it is very fast at building extensions, analytics or visualizations though.
mitmproxy/mitmweb offer a WireGuard server implementation to do pretty much this. You can grab any existing WireGuard VPN, scan a QR code to import the VPN config, and start monitoring (after installing the MITM certificate, of course).
The packet tunnel story is crazy. I'm glad Android allows you to just use network APIs without question as a developer.
> It's insane that I can't even develop for my own phone without paying an extra fee to Apple.
A Linux phone can’t come fast enough. Yes there is at least one, on ancient hardware. IMO a viable Linux phone requires hardware at most one generation old.