Block resumption psks - Githubissues

xmtp / libxmtp

LibXMTP is a shared library encapsulating the core functionality of the XMTP messaging protocol, such as cryptography, networking, and language bindings.

MIT License

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Block resumption psks #817

Closed nplasterer closed 3 months ago

nplasterer commented 3 months ago

Closes https://github.com/xmtp/libxmtp/issues/678

https://www.rfc-editor.org/rfc/rfc9420.html#section-12.1 https://openmls.tech/openmls/doc/openmls/schedule/psk/enum.Psk.html

[x] Block any ReInit proposal
[x] Block any Welcome with a PreSharedKeyID of type resumption with usage reinit

nplasterer commented 3 months ago

@franziskuskiefer do you mind taking a look at this? I'm not sure if this is correct way to block psks or if there are different functions I should be using.