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Ensure that all data of StaticSecret is cleared on drop #41

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merged 1 commit into from Apr 23, 2019
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Ensure that all data of StaticSecret is cleared on drop #41

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12 changes: 5 additions & 7 deletions src/x25519.rs
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Expand Up @@ -164,14 +164,12 @@ impl SharedSecret {
/// # Returns
///
/// A `Scalar`.
fn clamp_scalar(scalar: [u8; 32]) -> Scalar {
let mut s: [u8; 32] = scalar.clone();
fn clamp_scalar(mut scalar: [u8; 32]) -> Scalar {
scalar[0] &= 248;
scalar[31] &= 127;
scalar[31] |= 64;

s[0] &= 248;
s[31] &= 127;
s[31] |= 64;

Scalar::from_bits(s)
Scalar::from_bits(scalar)
}

/// The bare, byte-oriented x25519 function, exactly as specified in RFC7748.
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