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Feature request: Add support for eXtended-nonce ChaCha (AEAD_XChaCha20_Poly1305) #631

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bdemers opened this issue Dec 3, 2019 · 3 comments · May be fixed by #957
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Feature request: Add support for eXtended-nonce ChaCha (AEAD_XChaCha20_Poly1305) #631

bdemers opened this issue Dec 3, 2019 · 3 comments · May be fixed by #957
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@jill-kleiber

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@bdemers
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bdemers commented Dec 3, 2019

https://tools.ietf.org/html/draft-irtf-cfrg-xchacha-01#section-2

AEAD_XChaCha20_Poly1305

   XChaCha20-Poly1305 is a variant of the ChaCha20-Poly1305 AEAD
   construction as defined in [RFC7539] that uses a 192-bit nonce
   instead of a 96-bit nonce.
@bdemers
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bdemers commented Dec 3, 2019 •
edited

It might be possible to extend/tweak org.bouncycastle.crypto.modes.ChaCha20Poly1305) to take in the NONCE_SIZE in a constructor (or package private constructor)

ok3141 pushed a commit to ok3141/bc-java that referenced this issue Apr 14, 2020
@dghgit
github bcgit#631 fixed class misalignment on OtherName in name constr…
dfe9052 
…aints.
@alexdupre
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Given that there is already the implementation of XSala20 and ChaCha20-Poly1305 in BC, it shouldn't be too complex to add it.
I've found some experiments with BC.NET in the following url, but it cannot be imported as is: https://www.scottbrady91.com/C-Sharp/XChaCha20-Poly1305-dotnet
It'd be a nice addition.

@Traderjoe95 Traderjoe95 linked a pull request May 20, 2021 that will close this issue
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@Traderjoe95
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I address this in PR #957. The implementation really wasn't that much work along the lines of XSalsa20Engine

This was referenced Oct 3, 2022
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@tombentley tombentley mentioned this issue Feb 27, 2024
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@jill-kleiber jill-kleiber self-assigned this Mar 27, 2024
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Add XChaCha20Engine and XChaCha20Poly1305 kobil-systems/bc-java
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@bdemers @alexdupre @Traderjoe95 @jill-kleiber