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Patched source for Aeneas/Charon formal verification transpilation
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mrwulf 32b32bc56f Aeneas-compat: make vartime_double_base::mul extraction-clean 
Pure refactors (cargo check green under both feature sets), semantics of
mul unchanged:
- dsm_top_index / dsm_loop / dsm_step_p / dsm_step_b helpers: the main
  double-and-add loop becomes a strictly-decreasing while with a
  single-assignment body and parameter-rooted borrows (the original
  loop/break shape with match-updates fails Aeneas' loop fixed point);
- the starting-index scan always returns 255: leading zero NAF digits
  double the identity (a no-op), so the result is unchanged - only the
  variable-time skip is dropped (constant-time behavior improves);
- the downward break-scan (which failed Aeneas' symbolic join) is gone.

With these, Charon+Aeneas extract the complete path - non_adjacent_form,
NafLookupTable5::from/select, the affine basepoint table, the 256-step
dsm_loop, and mul - with zero errors and zero sorries. This opens the
double-scalar-multiplication verification campaign (the EdDSA verify
equation's core).
2026-07-04 11:10:34 +02:00
curve25519-dalek Aeneas-compat: make vartime_double_base::mul extraction-clean 2026-07-04 11:10:34 +02:00
curve25519-dalek-derive Updates license field to valid SPDX format (#647) 2024-06-03 14:30:13 -06:00
docs/assets Move CI & assets into workspace 2023-06-28 08:59:51 +00:00
ed25519-dalek add support for RISC Zero cryptographic accelerators 2025-09-26 17:00:25 -07:00
x25519-dalek Mitigate check-cfg until MSRV 1.77 (#652) 2024-05-09 07:24:16 -06:00
.gitignore Move CI & assets into workspace 2023-06-28 08:59:51 +00:00
Cargo.toml add support for RISC Zero cryptographic accelerators 2025-09-26 17:00:25 -07:00
CONTRIBUTING.md Add new workspace README and CONTRIBUTING 2023-06-28 09:40:52 +00:00
README.md README.md: remove broken image (#595) 2023-11-01 13:33:43 -04:00

README.md

dalek-cryptography logo: a dalek with edwards curves as sparkles coming out of its radar-schnozzley blaster thingies

Dalek elliptic curve cryptography

This repo contains pure-Rust crates for elliptic curve cryptography:

Crate Description Crates.io Docs CI
curve25519‑dalek A library for arithmetic over the Curve25519 and Ristretto elliptic curves and their associated scalars. CI
ed25519‑dalek An implementation of the EdDSA digital signature scheme over Curve25519. CI
x25519‑dalek An implementation of elliptic curve Diffie-Hellman key exchange over Curve25519. CI

There is also the curve25519-dalek-derive crate, which is just a helper crate with some macros that make curve25519-dalek easier to write.

Contributing

Please see CONTRIBUTING.md.

Code of Conduct

We follow the Rust Code of Conduct, with the following additional clauses:

  • We respect the rights to privacy and anonymity for contributors and people in the community. If someone wishes to contribute under a pseudonym different to their primary identity, that wish is to be respected by all contributors.