https://kotlinlang.org logo
Channels
100daysofcode
100daysofkotlin
100daysofkotlin-2021
advent-of-code
aem
ai
alexa
algeria
algolialibraries
amsterdam
android
android-architecture
android-databinding
android-studio
androidgithubprojects
androidthings
androidx
androidx-xprocessing
anime
anko
announcements
apollo-kotlin
appintro
arabic
argentina
arkenv
arksemdevteam
armenia
arrow
arrow-contributors
arrow-meta
ass
atlanta
atm17
atrium
austin
australia
austria
awesome-kotlin
ballast
bangladesh
barcelona
bayarea
bazel
beepiz-libraries
belgium
benchmarks
berlin
big-data
books
boston
brazil
brikk
budapest
build
build-tools
bulgaria
bydgoszcz
cambodia
canada
carrat
carrat-dev
carrat-feed
chicago
chile
china
chucker
cincinnati-user-group
cli
clikt
cloudfoundry
cn
cobalt
code-coverage
codeforces
codemash-precompiler
codereview
codingame
codingconventions
coimbatore
collaborations
colombia
colorado
communities
competitive-programming
competitivecoding
compiler
compose
compose-android
compose-desktop
compose-hiring
compose-ios
compose-mp
compose-ui-showcase
compose-wear
compose-web
confetti
connect-audit-events
corda
cork
coroutines
couchbase
coursera
croatia
cryptography
cscenter-course-2016
cucumber-bdd
cyprus
czech
dagger
data2viz
databinding
datascience
dckotlin
debugging
decompose
decouple
denmark
deprecated
detekt
detekt-hint
dev-core
dfw
docs-revamped
dokka
domain-driven-design
doodle
dsl
dublin
dutch
eap
eclipse
ecuador
edinburgh
education
effective-kotlin
effectivekotlin
emacs
embedded-kotlin
estatik
event21-community-content
events
exposed
failgood
fb-internal-demo
feed
firebase
flow
fluid-libraries
forkhandles
forum
fosdem
fp-in-kotlin
framework-elide
freenode
french
fritz2
fuchsia
functional
funktionale
gamedev
ge-kotlin
general-advice
georgia
geospatial
german-lang
getting-started
github-workflows-kt
glance
godot-kotlin
google-io
gradle
graphic
graphkool
graphql
graphql-kotlin
graviton-browser
greece
grpc
gsoc
gui
hackathons
hacktoberfest
hamburg
hamkrest
helios
helsinki
hexagon
hibernate
hikari-cp
hire-me
hiring
hongkong
hoplite
http4k
hungary
hyderabad
image-processing
india
indonesia
inkremental
intellij
intellij-plugins
intellij-tricks
internships
introduce-yourself
io
ios
iran
israel
istanbulcoders
italian
jackson-kotlin
jadx
japanese
jasync-sql
java-to-kotlin-refactoring
javadevelopers
javafx
javalin
javascript
jdbi
jhipster-kotlin
jobsworldwide
jpa
jshdq
juul-libraries
jvm-ir-backend-feedback
jxadapter
k2-early-adopters
kaal
kafka
kakao
kalasim
kapt
karachi
karg
karlsruhe
kash_shell
kaskade
kbuild
kdbc
kgen-doc-tools
kgraphql
kinta
klaxon
klock
kloudformation
kmdc
kmm-español
kmongo
knbt
knote
koalaql
koans
kobalt
kobweb
kodein
kodex
kohesive
koin
koin-dev
komapper
kondor-json
kong
kontent
kontributors
korau
korean
korge
korim
korio
korlibs
korte
kotest
kotest-contributors
kotless
kotlick
kotlin-asia
kotlin-beam
kotlin-by-example
kotlin-csv
kotlin-data-storage
kotlin-foundation
kotlin-fuel
kotlin-in-action
kotlin-inject
kotlin-latam
kotlin-logging
kotlin-multiplatform-contest
kotlin-mumbai
kotlin-native
kotlin-pakistan
kotlin-plugin
kotlin-pune
kotlin-roadmap
kotlin-samples
kotlin-sap
kotlin-serbia
kotlin-spark
kotlin-szeged
kotlin-website
kotlinacademy
kotlinbot
kotlinconf
kotlindl
kotlinforbeginners
kotlingforbeginners
kotlinlondon
kotlinmad
kotlinprogrammers
kotlinsu
kotlintest
kotlintest-devs
kotlintlv
kotlinultimatechallenge
kotlinx-datetime
kotlinx-files
kotlinx-html
kotrix
kotson
kovenant
kprompt
kraph
krawler
kroto-plus
ksp
ktcc
ktfmt
ktlint
ktor
ktp
kubed
kug-leads
kug-torino
kvision
kweb
lambdaworld_cadiz
lanark
language-evolution
language-proposals
latvia
leakcanary
leedskotlinusergroup
lets-have-fun
libgdx
libkgd
library-development
lincheck
linkeddata
lithuania
london
losangeles
lottie
love
lychee
macedonia
machinelearningbawas
madrid
malaysia
mathematics
meetkotlin
memes
meta
metro-detroit
mexico
miami
micronaut
minnesota
minutest
mirror
mockk
moko
moldova
monsterpuzzle
montreal
moonbean
morocco
motionlayout
mpapt
mu
multiplatform
mumbai
munich
mvikotlin
mvrx
myndocs-oauth2-server
naming
navigation-architecture-component
nepal
new-mexico
new-zealand
newname
nigeria
nodejs
norway
npm-publish
nyc
oceania
ohio-kotlin-users
oldenburg
oolong
opensource
orbit-mvi
osgi
otpisani
package-search
pakistan
panamá
pattern-matching
pbandk
pdx
peru
philippines
phoenix
pinoy
pocketgitclient
polish
popkorn
portugal
practical-functional-programming
proguard
prozis-android-backup
pyhsikal
python
python-contributors
quasar
random
re
react
reaktive
realm
realworldkotlin
reductor
reduks
redux
redux-kotlin
refactoring-to-kotlin
reflect
refreshversions
reports
result
rethink
revolver
rhein-main
rocksdb
romania
room
rpi-pico
rsocket
russian
russian_feed
russian-kotlinasfirst
rx
rxjava
san-diego
science
scotland
scrcast
scrimage
script
scripting
seattle
serialization
server
sg-user-group
singapore
skia-wasm-interop-temp
skrape-it
slovak
snake
sofl-user-group
southafrica
spacemacs
spain
spanish
speaking
spek
spin
splitties
spotify-mobius
spring
spring-security
squarelibraries
stackoverflow
stacks
stayhungrystayfoolish
stdlib
stlouis
strife-discord-lib
strikt
students
stuttgart
sudan
swagger-gradle-codegen
swarm
sweden
swing
swiss-user-group
switzerland
talking-kotlin
tallinn
tampa
teamcity
tegal
tempe
tensorflow
terminal
test
testing
testtestest
texas
tgbotapi
thailand
tornadofx
touchlab-tools
training
tricity-kotlin-user-group
trójmiasto
truth
tunisia
turkey
turkiye
twitter-feed
uae
udacityindia
uk
ukrainian
uniflow
unkonf
uruguay
utah
uuid
vancouver
vankotlin
vertx
videos
vienna
vietnam
vim
vkug
vuejs
web-mpp
webassembly
webrtc
wimix_sentry
wwdc
zircon
Powered by
Title
j

John O'Reilly

06/27/2022, 1:07 PM
Is there a way when using Ktor embedded server with Netty to block use of TLS 1.0 and 1.1?
I see suggestions like following but not sure if/how that can be done when using Ktor/Netty https://stackoverflow.com/questions/65680170/how-to-exclude-weak-protocols-ciphers-suits-from-the-netty-sslcontext
I think I can get access to
connector
and extract some of the code in
NettyChannelInitializer
for example.....
(btw still have to use 1.6.x here....and running on Android fwiw)
I built ktor locally here and included following in
NettyChannelInitializer
protocols("TLSv1.3", "TLSv1.2")
but for some reason following still working
openssl s_client -connect <ip address>:443 -tls1
ah, it did actually work....I had initially put that
protocols
call inside the
if (alpnProvider != null)
block but that is actually null!
sslContext = SslContextBuilder.forServer(pk, *certs).apply {
    protocols("TLSv1.3", "TLSv1.2")
    if (alpnProvider != null) {
        sslProvider(alpnProvider)
Just need to see now if there's any way to set this without custom build of ktor
@Aleksei Tirman [JB] just in case you might know if this is possible....or would it be worth creating PR to allow this to be customised?
a

Aleksei Tirman [JB]

06/29/2022, 11:03 AM
Unfortunately, I didn’t find an extension point to do it. You can file a feature request to address this problem.
j

John O'Reilly

06/29/2022, 11:09 AM
ok, have created that (https://youtrack.jetbrains.com/issue/KTOR-4587/Way-to-block-use-of-TLS-1011-when-using-KtorNetty) - let me know if any more info needed....or, as mentioned, if worth me trying to create PR to address this
I've created fork/branch off 1.6.3 (version we're currently on) that has the TLS fix. If I run
./gradlew publishToMavenLocal
and use
mavenLocal()
in project using ktor (using custom version we're using) then it works fine. However, when I try to publish to gitlab maven repo I'm running in to some issues with symbols not found for a few of the artifacts (have updated
publish.gradle
locally to point to our repo). Is there particular publication task I should run (have tried a few)? Screenshot shows example....
ktor-server-core
seems fine but having issues resolving symbols from `ktor-server-host-common`` for some reason
hmm, I've no idea what cause of issue was but I changed version number and did fresh publication and seems to be ok now.....perhaps something had gone wrong with previous publication or perhaps some caching issue.....
@Aleksei Tirman [JB] I can try and create PR for this....do you have any particular preference for where/how this should be configured?
a

Aleksei Tirman [JB]

07/14/2022, 9:38 AM
I don’t. @e5l, please advise.
e

e5l

07/14/2022, 9:55 AM
Yep, PR would be great. We actually can add it to the
2.1.0
this month if there are no breaking changes
j

John O'Reilly

07/14/2022, 12:22 PM
I would need to rebase this off master (currently based on 1.6.3) and add tests but just to check if following is reasonable approach here (seems to be one used later on with trust store config) https://github.com/ktorio/ktor/compare/main...joreilly:ktor:tls_version_block?expand=1
e

e5l

07/14/2022, 12:22 PM
Yep
j

John O'Reilly

07/15/2022, 8:20 AM
the above code is just for Netty (which is what we're using here).....assume similar code would need to be added for Jetty and Tomcat? Also looks like there
.api
file that needs to be updated?
e

e5l

07/15/2022, 8:21 AM
It's ok to update
.api
with
apiDump
gradle task
👍 1
j

John O'Reilly

07/15/2022, 8:53 AM
ok, I've updated to rebase on latest code and also added code for Tomcat and Jetty.....need to see now how best to test this (any pointers very warmly welcomed 🙂 ) https://github.com/ktorio/ktor/compare/main...joreilly:ktor:enable_protocols?expand=1
(fixed url)
e

e5l

07/15/2022, 10:24 AM
Could you open PR?
j

John O'Reilly

07/15/2022, 10:24 AM
I still haven't figured out tests yet....will I open up as is for now?
e

e5l

07/15/2022, 10:24 AM
I can run tests on CI
j

John O'Reilly

07/15/2022, 10:24 AM
ok
seeing several failures in CI tests so far for the PR but haven't been able to link them yet to my changes.....but I could be missing something
I had run
jvmTest
here locally fwiw and they had passed
e

e5l

07/15/2022, 11:05 AM
Yep, it looks like fails are not related
j

John O'Reilly

08/03/2022, 12:34 PM
Looks like builds are ok now again? However I don't seem to have ability to retry the build for that PR?