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Add XChaCha20Engine and XChaCha20Poly1305 #957

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Traderjoe95
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This PR adds an implementation of IETF draft XChaCha20 and XChaCha20Poly1305 (https://datatracker.ietf.org/doc/html/draft-irtf-cfrg-xchacha). The implementation was inspired by the XSalsa20 implementation.

Fixes #631

@pengten
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pengten commented Jun 11, 2024

What is the current progress of this PR? We really need XChaCha20

@orlys
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orlys commented Jan 1, 2025

Thank you again @Traderjoe95 for your contributions to the community.
Currently when implementing Branca Token, XChaCha20Poly1305 is needed. I would like to ask if there is any new progress on this issue.

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