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Add getrandom feature that enables builtin new_random constructors (see issue #85) #103

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Add getrandom feature that enables builtin new_random constructors (see issue #85) #103

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1 change: 1 addition & 0 deletions Cargo.toml
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Original file line number Diff line number Diff line change
Expand Up @@ -59,3 +59,4 @@ u64_backend = ["curve25519-dalek/u64_backend"]
u32_backend = ["curve25519-dalek/u32_backend"]
fiat_u64_backend = ["curve25519-dalek/fiat_u64_backend"]
fiat_u32_backend = ["curve25519-dalek/fiat_u32_backend"]
getrandom = ["rand_core/getrandom"]
18 changes: 18 additions & 0 deletions src/x25519.rs
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Expand Up @@ -87,6 +87,12 @@ impl EphemeralSecret {

EphemeralSecret(clamp_scalar(bytes))
}

/// Generate an x25519 [`EphemeralSecret`] key using [`rand_core::OsRng`].
#[cfg(feature = "getrandom")]
pub fn new_random() -> Self {
Self::new(&mut rand_core::OsRng)
}
}

impl<'a> From<&'a EphemeralSecret> for PublicKey {
Expand Down Expand Up @@ -135,6 +141,12 @@ impl ReusableSecret {

ReusableSecret(clamp_scalar(bytes))
}

/// Generate a non-serializeable x25519 [`ReuseableSecret`] key using [`rand_core::OsRng`].
#[cfg(feature = "getrandom")]
pub fn new_random() -> Self {
Self::new(&mut rand_core::OsRng)
}
}

#[cfg(feature = "reusable_secrets")]
Expand Down Expand Up @@ -186,6 +198,12 @@ impl StaticSecret {
StaticSecret(clamp_scalar(bytes))
}

/// Generate an x25519 key key using [`rand_core::OsRng`].
#[cfg(feature = "getrandom")]
pub fn new_random() -> Self {
Self::new(&mut rand_core::OsRng)
}

/// Extract this key's bytes for serialization.
pub fn to_bytes(&self) -> [u8; 32] {
self.0.to_bytes()
Expand Down