A web client port-scanner written in GO, that supports the WASM/WASI interface for Browser WebAssembly runtime execution.

Last update: Dec 27, 2022

Overview

WebAssembly Port Scanner

Written in Go with target WASM/WASI.
The WASM main function scans all the open ports in the specified range (see main.go), via 0.0.0.0 with no-cors fetch mode in Javascript level.

Discovers any TCP open port available on the visiting host.
One byte of response / filtered port is enough
Scans TCP only (WASM has no UDP support yet)
Uses golang 'http' API rather then 'net' API (better browser compatibility)

Setup

Please see ./build.sh

Build and Run

Simply start an HTTP server locally, for example:
python3 -m http.server 5000
Or:
npm i -g serve && serve

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Comments

`Uncaught (in promise) LinkError: import object field 'runtime.walltime' is not a Function`

In Firefox 106.0.5 (64-bit) on Gentoo ~amd64, go version go1.19.3 linux/amd64, getting this error, seen in devtools: Uncaught (in promise) LinkError: import object field 'runtime.walltime' is not a Function

Looks like this is why: https://github.com/golang/go/commit/862ddb37b4e24bcb89f060d50325c8f863ee99bc

Ah, I guess I just needed to update wasm_exec.js from the original location maybe? https://github.com/golang/go/blob/e18d07ddc5c9005738c3063130f0f5ccf127849e/misc/wasm/wasm_exec.js#L250

opened by correabuscar 5
Uncaught (in promise) TypeError: Failed to execute 'compile' on 'WebAssembly': Incorrect response MIME type. Expected 'application/wasm'.

Hello, I failed. I compiled the program on CentOS. GOOS=js GOARCH=wasm go build -o main.wasm And started the server in this directory. python3 -m http.server 5000 I'm sure both wasm_exec.js and main.wasm can be accessed. However, chrome reports an error in the console: Uncaught (in promise) TypeError: Failed to execute 'compile' on 'WebAssembly': Incorrect response MIME type. Expected 'application/wasm'.

opened by yaoh3i 3
error

localhost/:1 Uncaught (in promise) LinkError: WebAssembly.instantiate(): Import #5 module="go" function="runtime.walltime" error: function import requires a callable

opened by matti 2
Hello, I read the article you wrote. It is great. I would like to ask you. Is there any good way to generate unique browser fingerprint information based on user hardware information?

Hello, I read the article you wrote. It is great. I would like to ask you. Is there any good way to generate unique browser fingerprint information based on user hardware information?

opened by zouhuigang 1

Owner

Avi Lumelsky

R&D with deep security insights.

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