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feat: add X448 key exchange and Ed448 signatures - #288

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stevefan1999-personal wants to merge 4 commits into
RustCrypto:masterfrom
stevefan1999-personal:stack/02-x448-ed448
Draft

feat: add X448 key exchange and Ed448 signatures#288
stevefan1999-personal wants to merge 4 commits into
RustCrypto:masterfrom
stevefan1999-personal:stack/02-x448-ed448

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@stevefan1999-personal

@stevefan1999-personal stevefan1999-personal commented Aug 5, 2026

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Summary

Independent PR based on master (not stacked). Can land in any order relative to #287.

  • Add X448 key exchange
  • Add Ed448 signing and verification
  • Enable OpenSSL interop test for X448 groups

Test plan

  • cargo test --lib / clippy / no_std (1.85)
  • local openssl: vs_openssl_as_client_group_x448 passes
  • CI green

Add Curve448/X448 key agreement and Ed448 signing and verification
using the x448 and ed448-goldilocks crates.
Format kx/verify and remove should_panic from the X448 group
interop test now that X448 is supported.
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