2025-09-03 06:49:44 -04:00
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[package]
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name = "dalek-ff-group"
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Smash the singular `Ciphersuite` trait into multiple
This helps identify where the various functionalities are used, or rather, not
used. The `Ciphersuite` trait present in `patches/ciphersuite`, facilitating
the entire FCMP++ tree, only requires the markers _and_ canonical point
decoding. I've opened a PR to upstream such a trait into `group`
(https://github.com/zkcrypto/group/pull/68).
`WrappedGroup` is still justified for as long as `Group::generator` exists.
Moving `::generator()` to its own trait, on an independent structure (upstream)
would be massively appreciated. @tarcieri also wanted to update from
`fn generator()` to `const GENERATOR`, which would encourage further discussion
on https://github.com/zkcrypto/group/issues/32 and
https://github.com/zkcrypto/group/issues/45, which have been stagnant.
The `Id` trait is occasionally used yet really should be first off the chopping
block.
Finally, `WithPreferredHash` is only actually used around a third of the time,
which more than justifies it being a separate trait.
---
Updates `dalek_ff_group::Scalar` to directly re-export
`curve25519_dalek::Scalar`, as without issue. `dalek_ff_group::RistrettoPoint`
also could be replaced with an export of `curve25519_dalek::RistrettoPoint`,
yet the coordinator relies on how we implemented `Hash` on it for the hell of
it so it isn't worth it at this time. `dalek_ff_group::EdwardsPoint` can't be
replaced for an re-export of `curve25519_dalek::SubgroupPoint` as it doesn't
implement `zeroize`, `subtle` traits within a released, non-yanked version.
Relevance to https://github.com/serai-dex/serai/issues/201 and
https://github.com/dalek-cryptography/curve25519-dalek/issues/811#issuecomment-3247732746.
Also updates the `Ristretto` ciphersuite to prefer `Blake2b-512` over
`SHA2-512`. In order to maintain compliance with FROST's IETF standard,
`modular-frost` defines its own ciphersuite for Ristretto which still uses
`SHA2-512`.
2025-09-03 12:25:37 -04:00
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version = "0.5.99"
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2025-09-03 06:49:44 -04:00
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description = "ff/group bindings around curve25519-dalek"
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license = "MIT"
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repository = "https://github.com/serai-dex/serai/tree/develop/crypto/dalek-ff-group"
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authors = ["Luke Parker <lukeparker5132@gmail.com>"]
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keywords = ["curve25519", "ed25519", "ristretto", "dalek", "group"]
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edition = "2021"
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rust-version = "1.85"
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[package.metadata.docs.rs]
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all-features = true
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rustdoc-args = ["--cfg", "docsrs"]
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[lints]
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workspace = true
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[dependencies]
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dalek-ff-group = { path = "../../crypto/dalek-ff-group", default-features = false }
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crypto-bigint-05 = { package = "crypto-bigint", version = "0.5", default-features = false, features = ["zeroize"] }
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crypto-bigint = { version = "0.6", default-features = false, features = ["zeroize"] }
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prime-field = { path = "../../crypto/prime-field", default-features = false }
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[features]
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alloc = ["dalek-ff-group/alloc", "crypto-bigint-05/alloc", "crypto-bigint/alloc", "prime-field/alloc"]
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std = ["alloc", "dalek-ff-group/std", "prime-field/std"]
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default = ["std"]
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