generic_ec/secret_scalar/
definition.rs

1#[cfg(feature = "alloc")]
2#[cfg_attr(docsrs, doc(cfg(all())))]
3mod with_alloc {
4    use alloc::sync::Arc;
5    use zeroize::{Zeroize, Zeroizing};
6
7    use crate::{Curve, Scalar};
8
9    #[doc = include_str!("docs.md")]
10    pub struct SecretScalar<E: Curve>(Arc<Zeroizing<Scalar<E>>>);
11
12    impl<E: Curve> SecretScalar<E> {
13        #[doc = include_str!("docs-constructor.md")]
14        pub fn new(scalar: &mut Scalar<E>) -> Self {
15            let mut scalar_on_heap = Arc::<Zeroizing<Scalar<E>>>::default();
16            let scalar_mut = Arc::make_mut(&mut scalar_on_heap);
17            core::mem::swap(&mut **scalar_mut, scalar);
18            scalar.zeroize();
19            Self(scalar_on_heap)
20        }
21    }
22
23    impl<E: Curve> AsRef<Scalar<E>> for SecretScalar<E> {
24        fn as_ref(&self) -> &Scalar<E> {
25            &self.0
26        }
27    }
28
29    impl<E: Curve> Clone for SecretScalar<E> {
30        fn clone(&self) -> Self {
31            Self(self.0.clone())
32        }
33    }
34}
35
36#[cfg(not(feature = "alloc"))]
37#[cfg_attr(docsrs, doc(cfg(all())))]
38mod without_alloc {
39    use zeroize::{Zeroize, Zeroizing};
40
41    use crate::{Curve, Scalar};
42
43    #[doc = include_str!("docs.md")]
44    pub struct SecretScalar<E: Curve>(Zeroizing<Scalar<E>>);
45
46    impl<E: Curve> SecretScalar<E> {
47        #[doc = include_str!("docs-constructor.md")]
48        pub fn new(scalar: &mut Scalar<E>) -> Self {
49            let scalar_new = Self(Zeroizing::new(*scalar));
50            scalar.zeroize();
51            scalar_new
52        }
53    }
54
55    impl<E: Curve> AsRef<Scalar<E>> for SecretScalar<E> {
56        fn as_ref(&self) -> &Scalar<E> {
57            &self.0
58        }
59    }
60
61    impl<E: Curve> Clone for SecretScalar<E> {
62        fn clone(&self) -> Self {
63            Self(self.0.clone())
64        }
65    }
66}
67
68mod secret_scalar {
69    #[cfg(feature = "alloc")]
70    #[cfg_attr(docsrs, doc(cfg(all())))]
71    pub use super::with_alloc::SecretScalar;
72    #[cfg(not(feature = "alloc"))]
73    #[cfg_attr(docsrs, doc(cfg(all())))]
74    pub use super::without_alloc::SecretScalar;
75}
76
77pub use self::secret_scalar::SecretScalar;
generic_ec/secret_scalar/definition.rs

generic_ec/secret_scalar/
definition.rs
