TLS is broken when using Bun

[michei69]

Describe the bug

For some reason, connecting to an xmpp:// server, then upgrading to tls automatically seems to fail when using Bun. There's no problems in nodeJS though.

Note: I know this is technically an issue with Bun's implementation of node:tls, and not necessarily of xmpp.js's use of it, but im creating the issue over here because i honestly have no internal idea on how node:tls is truly used inside the project. Once it's discovered, we can move/migrate/create a new issue at Bun's side (if it's not reported already)

I wonder if it's related to bun#23556 or bun#24374 as well, although this appears to be happening both on Arch and on Windows 11. (Logs are from Arch)

Logs

Node.js

status connecting xmpp://jc.smule.com
status connect 
status opening 
status open <stream:stream id="15846425431735129396" version="1.0" xml:lang="en" xmlns:stream="http://etherx.jabber.org/streams" from="jc.smule.com" xmlns="jabber:client"/>
IN
<stream:features>
    <starttls xmlns="urn:ietf:params:xml:ns:xmpp-tls">
        <required/>
    </starttls>
</stream:features>
OUT
<starttls xmlns="urn:ietf:params:xml:ns:xmpp-tls"/>
IN
<proceed xmlns="urn:ietf:params:xml:ns:xmpp-tls"/>
status opening 
status open <stream:stream id="3213348643858085085" version="1.0" xml:lang="en" xmlns:stream="http://etherx.jabber.org/streams" to="[REDACTED]@jc.smule.com" from="jc.smule.com" xmlns="jabber:client"/>
IN
<stream:features>
    <mechanisms xmlns="urn:ietf:params:xml:ns:xmpp-sasl">
        <mechanism>PLAIN</mechanism>
        <mechanism>X-OAUTH2</mechanism>
    </mechanisms>
    <sasl-channel-binding xmlns="urn:xmpp:sasl-cb:0">
        <channel-binding type="tls-exporter"/>
        <channel-binding type="tls-server-end-point"/>
    </sasl-channel-binding>
    <authentication xmlns="urn:xmpp:sasl:2">
        <inline>
            <bind xmlns="urn:xmpp:bind:0">
                <inline>
                    <feature var="urn:xmpp:sm:3"/>
                </inline>
            </bind>
            <sm xmlns="urn:xmpp:sm:3"/>
        </inline>
        <mechanism>PLAIN</mechanism>
        <mechanism>X-OAUTH2</mechanism>
    </authentication>
</stream:features>
OUT
<authenticate xmlns="urn:xmpp:sasl:2" mechanism="PLAIN">
    <initial-response>
        <hidden xmlns="xmpp.js"/>
    </initial-response>
    <user-agent id="81caa81a-940e-4c98-b455-e5882bc944e9"/>
    <bind xmlns="urn:xmpp:bind:0">
        <tag>smule855c34</tag>
        <enable xmlns="urn:xmpp:sm:3" resume="true"/>
    </bind>
</authenticate>
IN
<success xmlns="urn:xmpp:sasl:2">
    <bound xmlns="urn:xmpp:bind:0">
        <enabled resume="true" max="10" id="g2gCbQAAABZzbXVsZTg1NWMzNC5sQ3M1YVV0d2x1bQAAAAiDYiwN1i6REw==" xmlns="urn:xmpp:sm:3"/>
    </bound>
    <authorization-identifier>[REDACTED]@jc.smule.com/smule855c34.lCs5aUtwlu</authorization-identifier>
    <additional-data>
        <hidden xmlns="xmpp.js"/>
    </additional-data>
</success>
status online [REDACTED]@jc.smule.com/smule855c34.lCs5aUtwlu
IN
<stream:features>
    <sm xmlns="urn:xmpp:sm:2"/>
    <sm xmlns="urn:xmpp:sm:3"/>
</stream:features>
OUT
<presence to="cf[REDACTED]@conference.jc.smule.com/[REDACTED]">
    <x xmlns="http://jabber.org/protocol/muc">
        <password/>
        <history maxstanzas="1"/>
    </x>
</presence>
OUT
<resume xmlns="urn:xmpp:sm:3" h="0" previd="g2gCbQAAABZzbXVsZTg1NWMzNC5sQ3M1YVV0d2x1bQAAAAiDYiwN1i6REw=="/>
IN
<presence to="[REDACTED]@jc.smule.com/smule855c34.lCs5aUtwlu" from="cf[REDACTED]@conference.jc.smule.com" id="14541335985161252543">
    <c ver="ikPzXtDtEk8LWW8Hppy81GTflcE=" node="http://www.process-one.net/en/ejabberd/" hash="sha-1" xmlns="http://jabber.org/protocol/caps"/>
</presence>
IN
<r xmlns="urn:xmpp:sm:3"/>
IN
<presence xml:lang="en-IR" to="[REDACTED]@jc.smule.com/smule855c34.lCs5aUtwlu" from="cf[REDACTED]@conference.jc.smule.com/[REDACTED]">
    <x xmlns="http://jabber.org/protocol/muc#user">
        <item jid="[REDACTED]@jc.smule.com/UWZuSpAvuwygzoF+Vvi5bQ" role="participant" affiliation="none"/>
    </x>
    <priority>0</priority>
</presence>
IN
<presence xml:lang="en" to="[REDACTED]@jc.smule.com/smule855c34.lCs5aUtwlu" from="cf[REDACTED]@conference.jc.smule.com/[REDACTED]">
    <x xmlns="http://jabber.org/protocol/muc#user">
        <item jid="[REDACTED]@jc.smule.com/Jpmcyx/SQDGY9TTr8SqSdQ" role="participant" affiliation="none"/>
    </x>
</presence>
OUT
<a xmlns="urn:xmpp:sm:3" h="1"/>
IN
<presence xml:lang="en-NL" to="[REDACTED]@jc.smule.com/smule855c34.lCs5aUtwlu" from="cf[REDACTED]@conference.jc.smule.com/[REDACTED]">
    <x xmlns="http://jabber.org/protocol/muc#user">
        <item jid="[REDACTED]@jc.smule.com/ZA+8UwU+5F94QgzLUThqzQ" role="participant" affiliation="none"/>
    </x>
    <priority>0</priority>
</presence>
IN
<presence xml:lang="en" to="[REDACTED]@jc.smule.com/smule855c34.lCs5aUtwlu" from="cf[REDACTED]@conference.jc.smule.com/[REDACTED]">
    <x xmlns="http://jabber.org/protocol/muc#user">
        <item jid="[REDACTED]@jc.smule.com/sR7y3sqtQxyaplILDHeIJg" role="moderator" affiliation="owner"/>
    </x>
</presence>
IN
<presence xml:lang="en" to="[REDACTED]@jc.smule.com/smule855c34.lCs5aUtwlu" from="cf[REDACTED]@conference.jc.smule.com/[REDACTED]">
    <x xmlns="http://jabber.org/protocol/muc#user">
        <item jid="[REDACTED]@jc.smule.com/smule855c34.lCs5aUtwlu" role="participant" affiliation="none"/>
        <status code="100"/>
        <status code="110"/>
    </x>
</presence>
IN
<message to="[REDACTED]@jc.smule.com/smule855c34.lCs5aUtwlu" from="cf[REDACTED]@conference.jc.smule.com" type="groupchat">
    <subject/>
</message>
OUT
<r xmlns="urn:xmpp:sm:3"/>
IN
<failed xmlns="urn:xmpp:sm:3">
    <unexpected-request xmlns="urn:ietf:params:xml:ns:xmpp-stanzas"/>
    <text xml:lang="en" xmlns="urn:ietf:params:xml:ns:xmpp-stanzas">Stream management is already enabled</text>
</failed>
OUT
<enable xmlns="urn:xmpp:sm:3" resume="true"/>
IN
<r xmlns="urn:xmpp:sm:3"/>
OUT
<a xmlns="urn:xmpp:sm:3" h="7"/>
IN
<a h="1" xmlns="urn:xmpp:sm:3"/>

Bun

status connecting xmpp://jc.smule.com
status connect 
status opening 
status open <stream:stream id="18297535536692171957" version="1.0" xml:lang="en" xmlns:stream="http://etherx.jabber.org/streams" from="jc.smule.com" xmlns="jabber:client"/>
IN
<stream:features>
    <starttls xmlns="urn:ietf:params:xml:ns:xmpp-tls">
        <required/>
    </starttls>
</stream:features>
OUT
<starttls xmlns="urn:ietf:params:xml:ns:xmpp-tls"/>
IN
<proceed xmlns="urn:ietf:params:xml:ns:xmpp-tls"/>
status opening 
57 |   }
58 | 
59 |   onText(str) {
60 |     const { cursor } = this;
61 |     if (!cursor) {
62 |       this.emit("error", new XMLError(`${str} must be a child.`));
^
XMLError: J▒�0��9{h��zad�=31��@i�S must be a child.
at onText (/windows/Users/miki/Desktop/projects/smule-api/node_modules/@xmpp/xml/lib/Parser.js:62:26)
at emit (node:events:95:22)
at write (/windows/Users/miki/Desktop/projects/smule-api/node_modules/ltx/lib/parsers/ltx.js:121:22)
at write (/windows/Users/miki/Desktop/projects/smule-api/node_modules/@xmpp/xml/lib/Parser.js:70:17)
at _onData (/windows/Users/miki/Desktop/projects/smule-api/node_modules/@xmpp/connection/index.js:50:17)
at emit (node:events:95:22)
at addChunk (internal:streams/readable:265:47)
at readableAddChunkPushByteMode (internal:streams/readable:243:18)
at data (node:net:280:52)

OUT
<stream:error>
    <bad-format xmlns="urn:ietf:params:xml:ns:xmpp-streams"/>
</stream:error>
57 |   }
58 | 
59 |   onText(str) {
60 |     const { cursor } = this;
61 |     if (!cursor) {
62 |       this.emit("error", new XMLError(`${str} must be a child.`));
^
XMLError: J▒�0��9{h��zad�=31��@i�S must be a child.
at onText (/windows/Users/miki/Desktop/projects/smule-api/node_modules/@xmpp/xml/lib/Parser.js:62:26)
at emit (node:events:95:22)
at write (/windows/Users/miki/Desktop/projects/smule-api/node_modules/ltx/lib/parsers/ltx.js:121:22)
at write (/windows/Users/miki/Desktop/projects/smule-api/node_modules/@xmpp/xml/lib/Parser.js:70:17)
at _onData (/windows/Users/miki/Desktop/projects/smule-api/node_modules/@xmpp/connection/index.js:50:17)
at emit (node:events:95:22)
at addChunk (internal:streams/readable:265:47)
at readableAddChunkPushByteMode (internal:streams/readable:243:18)
at data (node:net:280:52)

status closing 
status close [object Object]
status disconnecting 
57 |   }
58 | 
59 |   onText(str) {
60 |     const { cursor } = this;
61 |     if (!cursor) {
62 |       this.emit("error", new XMLError(`${str} must be a child.`));
^
XMLError: J▒�0��9{h��zad�=31��@i�S must be a child.
at onText (/windows/Users/miki/Desktop/projects/smule-api/node_modules/@xmpp/xml/lib/Parser.js:62:26)
at emit (node:events:95:22)
at write (/windows/Users/miki/Desktop/projects/smule-api/node_modules/ltx/lib/parsers/ltx.js:121:22)
at write (/windows/Users/miki/Desktop/projects/smule-api/node_modules/@xmpp/xml/lib/Parser.js:70:17)
at _onData (/windows/Users/miki/Desktop/projects/smule-api/node_modules/@xmpp/connection/index.js:50:17)
at emit (node:events:95:22)
at addChunk (internal:streams/readable:265:47)
at readableAddChunkPushByteMode (internal:streams/readable:243:18)
at data (node:net:280:52)
status disconnect [object Object]

Environment

@xmpp/client: 0.14.0
@xmpp/debug: 0.14.0
@xmpp/jid: 0.14.0
@xmpp/resolve: 0.14.0
@xmpp/starttls: 0.14.0

Running bun v1.3.5, nodejs v25.2.1 on CachyOS (Linux 6.18.2-3-cachyos)

[sonnyp]

Are you able to reproduce with Bun 1.2.x ?

[michei69]

Same exact issue on v1.2.23 (windows this time around)