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Merge pull request #325 from rubdos/const_fn_for_scalar_from_bits

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Make Scalar::from_bits a const fn.
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Henry de Valence 2020-05-29 12:26:31 -07:00 committed by GitHub
commit e342f25c4e
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src/scalar.rs
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@ -243,7 +243,7 @@ impl Scalar {
/// This function is intended for applications like X25519 which
/// require specific bit-patterns when performing scalar
/// multiplication.
pub fn from_bits(bytes: [u8; 32]) -> Scalar {
pub const fn from_bits(bytes: [u8; 32]) -> Scalar {
let mut s = Scalar{bytes};
// Ensure that s < 2^255 by masking the high bit
s.bytes[31] &= 0b0111_1111;