Merging upstream version 1.70.0+dfsg2.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 32 insertions, 0 deletions

diff --git a/vendor/elliptic-curve/src/scalar.rs b/vendor/elliptic-curve/src/scalar.rs
new file mode 100644
index 000000000..72d796847
--- /dev/null
+++ b/vendor/elliptic-curve/src/scalar.rs
@@ -0,0 +1,32 @@
+//! Scalar types.
+
+use subtle::Choice;
+
+pub(crate) mod core;
+
+#[cfg(feature = "arithmetic")]
+pub(crate) mod nonzero;
+
+#[cfg(feature = "arithmetic")]
+use crate::ScalarArithmetic;
+
+/// Scalar field element for a particular elliptic curve.
+#[cfg(feature = "arithmetic")]
+#[cfg_attr(docsrs, doc(cfg(feature = "arithmetic")))]
+pub type Scalar<C> = <C as ScalarArithmetic>::Scalar;
+
+/// Bit representation of a scalar field element of a given curve.
+#[cfg(feature = "bits")]
+#[cfg_attr(docsrs, doc(cfg(feature = "bits")))]
+pub type ScalarBits<C> = ff::FieldBits<<Scalar<C> as ff::PrimeFieldBits>::ReprBits>;
+
+/// Is this scalar greater than n / 2?
+///
+/// # Returns
+///
+/// - For scalars 0 through n / 2: `Choice::from(0)`
+/// - For scalars (n / 2) + 1 through n - 1: `Choice::from(1)`
+pub trait IsHigh {
+    /// Is this scalar greater than or equal to n / 2?
+    fn is_high(&self) -> Choice;
+}