dreadl0ck / ja3 Goto Github PK
View Code? Open in Web Editor NEWGo package for Ja3 TLS client and server hello fingerprints
License: BSD 3-Clause "New" or "Revised" License
Go package for Ja3 TLS client and server hello fingerprints
License: BSD 3-Clause "New" or "Revised" License
Is there a mechanism to normalize client hellos? Chrome is randomizing order: https://hnull.org/2022/12/01/sorting-out-randomized-tls-fingerprints/
Lines 121 to 139 in 0c3c870
I'm seeing a small discrepancy between this library and pyja3. When the final extension is a GREASE value, a trailing '-' is left on. It appears this can happen with ciphers as well, but I haven't seen that actually manifest.
Example:
771,4865-4866-4867-49195-49199-49196-49200-52393-52392-49171-49172-156-157-47-53,23-18-51-43-16-10-65281-17513-13-27-5-11-35-45-0,29-23-24,0 (pyja3)
771,4865-4866-4867-49195-49199-49196-49200-52393-52392-49171-49172-156-157-47-53,23-18-51-43-16-10-65281-17513-13-27-5-11-35-45-0-,29-23-24,0 (this library)
Here's a sample hex client hello to reproduce:
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
I found that this project already supports Go modules. But sadly, the tags doesn't follow Semantic Versioning, which means that all tags of this project will be ignored by Go modules and replaced by pseudo-versions, go get acts weirdly when tags are not in that form. It would be great to have the tagged release be named in the format vX.X.X format so that go mod can read it.
$go get github.com/dreadl0ck/[email protected]
go get github.com/dreadl0ck/[email protected]: no matching versions for query "v1.0"
$go get github.com/dreadl0ck/ja3
go: downloading github.com/dreadl0ck/ja3 v0.0.0-20200304222813-39f4a089559b
go: github.com/dreadl0ck/ja3 upgrade => v0.0.0-20200304222813-39f4a089559b
Else the mod file shows something like github.com/dreadl0ck/ja3 v0.0.0-20200304222813-39f4a089559b
which is not very readable and difficult to upgrade. Itβs hard to verify which version is in use. This is not conducive to version control.
So, I propose this project to follow Semantic Versioning in future versions. For example, v1.0.1
, v2.0.0
, v3.1.0-alpha
, v3.1.0-beta.2
etc, so that other project can use tag in go.mod.
Hello, great library, i am trying to use it to generate fingerprints of incoming requests to my go server to enhance security, is there any way to pass the request to a method and get back the ja3? i ve seen the documentation and it accepts gopacket.Packet or *tlsx.ServerHelloBasic but cant understand how i am supposed to extract them from the request got in my server. Thx for the support.
(p.s. it might be helpful to have basic usage examples in the doc, i dont think there is unless i ve missed it )
goja3.exe -iface Ethernet0
panic: Loopback: No such device exists (No such device exists)
goroutine 1 [running]:
github.com/dreadl0ck/ja3.ReadInterface(0xc0000100b8, 0x8, 0xcbf000, 0xc000006018, 0xc718f6, 0x1, 0xc000070101, 0x5ea, 0xc00003e001, 0xffffffffff676980)
C:/Users/win/Desktop/ja3-master/live.go:23 +0x26e5
main.main()
C:/Users/win/Desktop/ja3-master/cmd/main.go:56 +0x34e
Machine is a VM and have Ethernet0
Idx Met MTU State Name
12 25 1500 connected Ethernet0
Commit 3e0281e
broke my code. I use google/gopacket for my own analysis, and dreadl0ck/gopacket is producing conflicts.
When I try and run my code, I see
duplicate symbol '_pcap_wait' in:
/var/folders/lt/fwtf8x396cbbd39911cdfrl400724v/T/go-link-974407391/000019.o
/var/folders/lt/fwtf8x396cbbd39911cdfrl400724v/T/go-link-974407391/000021.o
duplicate symbol '_pcap_next_ex_escaping' in:
/var/folders/lt/fwtf8x396cbbd39911cdfrl400724v/T/go-link-974407391/000019.o
/var/folders/lt/fwtf8x396cbbd39911cdfrl400724v/T/go-link-974407391/000021.o
duplicate symbol '_pcap_offline_filter_escaping' in:
/var/folders/lt/fwtf8x396cbbd39911cdfrl400724v/T/go-link-974407391/000019.o
/var/folders/lt/fwtf8x396cbbd39911cdfrl400724v/T/go-link-974407391/000021.o
ld: 3 duplicate symbols for architecture x86_64
duplicate symbols:
grep -r _pcap_wait *
Binary file pkg/darwin_amd64/github.com/google/gopacket/pcap.a matches
Binary file pkg/darwin_amd64/github.com/dreadl0ck/gopacket/pcap.a matches
objdump -syms pkg/darwin_amd64/github.com/dreadl0ck/gopacket/pcap.a |grep pcap_wait
0000000000000bb0 g F __TEXT,__text __cgo_216e6da8ebe5_Cfunc_pcap_wait
0000000000000030 g F __TEXT,__text _pcap_wait
objdump -syms pkg/darwin_amd64/github.com/google/gopacket/pcap.a |grep pcap_wait
0000000000000bb0 g F __TEXT,__text __cgo_193fe916b310_Cfunc_pcap_wait
0000000000000030 g F __TEXT,__text _pcap_wait
I'm trying to use dreadl0ck/ja3 as an import in my own code.
When I try to compile ja3 I am prompted with the following error
go build -o $(go env GOPATH)/bin/goja3 -i github.com/dreadl0ck/ja3/cmd
# github.com/google/gopacket/pcap
../test/pkg/mod/github.com/google/[email protected]/pcap/pcap_unix.go:34:18: fatal error: pcap.h: No such file or directory
compilation terminated.
when I run this /root/go/bin/goja3 -ja3s=false -json -iface eth1
the result
[root@localhost ja3]# /root/go/bin/goja3 -ja3s=false -json -iface eth1
timestamp,source_ip,source_port,destination_ip,destination_port,ja3_digest
1600315798.710436,128.59.66.11,443,10.246.120.106,61720,dd4b012f7a008e741554bd0a4ed12920
1600315798.710710,61.129.7.21,443,10.246.52.102,62627,389ed42c02ebecc32e73aa31def07e14
1600315798.713353,61.155.222.97,443,10.246.121.186,53185,3653a20186a5b490426131a611e01992
1600315798.717188,61.155.222.97,443,10.246.121.186,53186,3653a20186a5b490426131a611e01992
1600315798.718566,10.246.92.133,2301,180.101.212.39,443,3b5074b1b5d032e5620f69f9f700ff0e
1600315798.732672,180.101.212.39,443,10.246.120.138,53336,e9a3ced07403903421d84ae7e9d92be5
1600315798.735224,10.246.142.18,41458,172.217.160.110,443,66918128f1b9b03303d77c6f2eefd128
1600315798.735948,10.246.142.18,41460,172.217.160.110,443,66918128f1b9b03303d77c6f2eefd128
1600315798.738636,10.246.152.123,43522,118.193.98.74,443,9b02ebd3a43b62d825e1ac605b621dc8
1600315798.739077,10.246.104.50,2608,180.163.32.196,443,44d502d471cfdb99c59bdfb0f220e5a8
1600315798.741837,192.168.104.159,61602,116.211.20.187,8514,455bd65d382d4741f0e48654f27cbe80
1600315798.742983,10.246.40.103,49517,117.18.232.200,443,3b5074b1b5d032e5620f69f9f700ff0e
1600315798.747841,119.23.53.168,443,10.246.92.224,61554,4ef1b297bb817d8212165a86308bac5f
1600315798.749056,10.246.152.180,38806,157.255.245.29,443,c4d9c7fc50e1fd2ebf09e3d9a2a31b33
1600315798.749270,119.23.53.168,443,10.246.92.224,61555,4ef1b297bb817d8212165a86308bac5f
1600315798.752894,139.227.253.126,6690,10.246.34.52,6672,20e0bd1c4d36e08a1f31656fb48b99a0
1600315798.756333,10.246.114.99,54261,172.217.160.74,443,b32309a26951912be7dba376398abc3b
1600315798.756440,61.174.240.228,443,10.246.138.147,39796,4cf820cab8f5a2bf61be14f5493233ae
panic: runtime error: slice bounds out of range [:15] with capacity 12
goroutine 1 [running]:
github.com/dreadl0ck/tlsx.(*ServerHelloBasic).Unmarshal(0xc00015d830, 0xc000356c6a, 0xc, 0xc, 0x4c984a, 0x0)
/root/go/pkg/mod/github.com/dreadl0ck/[email protected]/serverHello.go:270 +0x7d5
github.com/dreadl0ck/ja3.BarePacketJa3s(0x63b980, 0xc00037cdc0, 0xee0e38, 0x0, 0x0)
/home/morty/ja3/gopacket.go:119 +0x110
github.com/dreadl0ck/ja3.DigestHexPacketJa3s(0x63b980, 0xc00037cdc0, 0x0, 0x0)
/home/morty/ja3/gopacket.go:58 +0x39
github.com/dreadl0ck/ja3.ReadInterfaceCSV(0x7ffc2e4667e9, 0x4, 0x6360e0, 0xc000010018, 0x5e9566, 0x1)
/home/morty/ja3/live.go:51 +0x1846
main.main()
/home/morty/ja3/cmd/main.go:44 +0x2e2
Hello!
JA3 are to ignore values utilizing GREASE (https://tools.ietf.org/html/draft-davidben-tls-grease-01).
As given by https://github.com/salesforce/ja3/blob/master/python/ja3.py all values: ciphers, extensions, elliptic curve and elliptic curve point formats, should be filtered so GREASE values are not added to the ja3 digest. The ja3 authors probably did not mean to filter ecpf in GREASE since its a uint8.
Example on how this is done can be found here:
https://github.com/D4-project/sensor-d4-tls-fingerprinting
(Tho, that library is missing filtering GREASE for elliptic curves, see D4-project/sensor-d4-tls-fingerprinting#13)
If this is not done you will not produce the correct hash.
Cheers,
Kjell Tore Fossbakk
@dreadl0ck Can you help to upgrade for TLS application extension?
Reference:
refraction-networking/utls#113
https://github.com/refraction-networking/utls/releases/tag/v1.1.2
A declarative, efficient, and flexible JavaScript library for building user interfaces.
π Vue.js is a progressive, incrementally-adoptable JavaScript framework for building UI on the web.
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
An Open Source Machine Learning Framework for Everyone
The Web framework for perfectionists with deadlines.
A PHP framework for web artisans
Bring data to life with SVG, Canvas and HTML. πππ
JavaScript (JS) is a lightweight interpreted programming language with first-class functions.
Some thing interesting about web. New door for the world.
A server is a program made to process requests and deliver data to clients.
Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.
Some thing interesting about visualization, use data art
Some thing interesting about game, make everyone happy.
We are working to build community through open source technology. NB: members must have two-factor auth.
Open source projects and samples from Microsoft.
Google β€οΈ Open Source for everyone.
Alibaba Open Source for everyone
Data-Driven Documents codes.
China tencent open source team.