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Add support for XChaCha20 and XChaCha20-Poly1305 #6557

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polhenarejos opened this issue Nov 8, 2022 · 1 comment
Open

Add support for XChaCha20 and XChaCha20-Poly1305 #6557

polhenarejos opened this issue Nov 8, 2022 · 1 comment
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component-crypto Crypto primitives and low-level interfaces help-wanted This issue is not being actively worked on, but PRs welcome. size-l Estimated task size: large (2w+)

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@polhenarejos
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Suggested enhancement

Add support for extended versions of ChaCha20 and ChaCha20-Poly1305.

I submitted a PR with it #6556

Justification

It is well known the potential issues ChaCha20 may show due to short nonce (12 bytes). eXtended ChaCha20 (XChaCha20) aims at solving it by doubling the nonce and introducing minor changes to ChaCha20.

Related with #3381
This was referenced Nov 8, 2022
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@gilles-peskine-arm
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Note that for a complete implementation, we'll need:

  • a self-test
  • a cipher interface
  • a PSA interface (first step being to specify it)

@gilles-peskine-arm gilles-peskine-arm added component-crypto Crypto primitives and low-level interfaces size-l Estimated task size: large (2w+) help-wanted This issue is not being actively worked on, but PRs welcome. labels Nov 8, 2022
@daverodgman daverodgman mentioned this issue Feb 10, 2023
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@gilles-peskine-arm gilles-peskine-arm mentioned this issue May 18, 2023
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component-crypto Crypto primitives and low-level interfaces help-wanted This issue is not being actively worked on, but PRs welcome. size-l Estimated task size: large (2w+)
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