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sntrup-kem: replace subtle with ctutils #404

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Merged
tarcieri merged 1 commit into from
Oct 25, 2026
Merged

sntrup-kem: replace subtle with ctutils #404

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2 changes: 1 addition & 1 deletion Cargo.lock
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2 changes: 1 addition & 1 deletion sntrup-kem/Cargo.toml
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Original file line number Diff line number Diff line change
Expand Up @@ -27,10 +27,10 @@ serde = ["dep:serdect", "dep:serde"]
js = ["getrandom/wasm_js"]

[dependencies]
ctutils = "0.4"
hex = "0.4"
rand = "0.10.0"
rand_chacha = "0.10.0"
subtle = "2"
getrandom = { version = "0.4", optional = true }
hybrid-array = { version = "0.4.14", features = ["extra-sizes"], optional = true }
kem = { version = "0.3", optional = true }
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14 changes: 7 additions & 7 deletions sntrup-kem/src/types.rs
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Expand Up @@ -3,7 +3,7 @@
use crate::error::Error;
use crate::params::SntrupParams;
use core::marker::PhantomData;
use subtle::ConstantTimeEq;
use ctutils::{Choice, CtEq};
use zeroize::Zeroize;

/// Streamlined NTRU Prime encapsulation key (public key).
Expand Down Expand Up @@ -215,11 +215,11 @@ impl<P: SntrupParams> PartialEq for Ciphertext<P> {
impl<P: SntrupParams> Eq for Ciphertext<P> {}

// ---------------------------------------------------------------------------
// ConstantTimeEq / PartialEq / Eq (DecapsulationKey)
// CtEq / PartialEq / Eq (DecapsulationKey)
// ---------------------------------------------------------------------------

impl<P: SntrupParams> ConstantTimeEq for DecapsulationKey<P> {
fn ct_eq(&self, other: &Self) -> subtle::Choice {
impl<P: SntrupParams> CtEq for DecapsulationKey<P> {
fn ct_eq(&self, other: &Self) -> Choice {
self.bytes.as_slice().ct_eq(other.bytes.as_slice())
}
}
Expand All @@ -233,11 +233,11 @@ impl<P: SntrupParams> PartialEq for DecapsulationKey<P> {
impl<P: SntrupParams> Eq for DecapsulationKey<P> {}

// ---------------------------------------------------------------------------
// ConstantTimeEq / PartialEq / Eq (SharedSecret)
// CtEq / PartialEq / Eq (SharedSecret)
// ---------------------------------------------------------------------------

impl<P: SntrupParams> ConstantTimeEq for SharedSecret<P> {
fn ct_eq(&self, other: &Self) -> subtle::Choice {
impl<P: SntrupParams> CtEq for SharedSecret<P> {
fn ct_eq(&self, other: &Self) -> Choice {
self.bytes.as_slice().ct_eq(other.bytes.as_slice())
}
}
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