SecureClient

Automatic SSL Pinning

Secure the standard net/http client with SSL pinning to prevent users from sniffing requests with a Man-In-The-Middle proxy

This package takes in a list of hosts and provides a function to create net/http clients with SSL Pinning. For best practices

pinner, err := SecureClient.New(hosts, requireAll, BadPinDetected)

Should be called on startup (typically in main()), and whenever a client is needed you may call

client, err := pinner.NewClient(proxy)

The SSL Pins only need to be generated once per program run max, which is done in SecureClient.New().

Future plans include storing SSL Pins to file and updating them once a week or so. I'm pretty sure the pins shouldnt change for a good bit of time.

Example Usage

Example 1 - See tests

Here is the output from example 1 on SNS.

The first test was done without any MITM sniffer and succeeded (unproxied, a valid connection).

The second test was done using Postman Request interceptor (the standard proxy on localhost:5555)

Example 2

package main

import (
	"fmt"
	"github.com/rustler47/SecureClient"
)

func main() {
	fmt.Println("SSL Pinning test\n\n")

	MITMProxy  := "http://localhost:5555"

	hosts := []string{ "kith.com" }

	BadPinDetected := func(proxy string){
		fmt.Println("WARNING! Failed SSL pinning - Invalid cert detected\n", "Proxy:", proxy)
	}
	
	pinner, err := SecureClient.New(hosts, true, BadPinDetected)
	if err != nil { return }

	client, err := pinner.NewClient(MITMProxy)
	if err != nil { return }
	
	client.Get("https://kith.com")
	
	pause := make(chan bool, 1)
	<-pause
}

Tips

BadPinDetected fires when the SSL pin is not matched, and passes in the proxy which triggered the bad connection. This is a perfect place to send a message to an API to flag the user and/or disable their key

References

tam7t/hpkp

License

rustler47/SecureClient

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