saymrwulf/curve25519-dalek-source
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Use array_ref! for getting digest during signing.

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Isis Lovecruft 2017-03-15 18:42:58 +00:00
parent e4c085706c
commit f1dd165208
Failed to extract signature
1 changed files with 3 additions and 4 deletions
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7
src/ed25519.rs
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@ -253,7 +253,7 @@ impl PublicKey {
let mut a: ExtendedPoint; let mut a: ExtendedPoint;
let ao: Option<ExtendedPoint>; let ao: Option<ExtendedPoint>;
let r: ProjectivePoint; let r: ProjectivePoint;
let mut digest: [u8; 64]; let digest: [u8; 64];
let digest_reduced: Scalar; let digest_reduced: Scalar;
if signature.0[63] & 224 != 0 { if signature.0[63] & 224 != 0 {
@ -268,16 +268,15 @@ impl PublicKey {
} }
a = -(&a); a = -(&a);
digest = [0u8; 64];
let top_half: &[u8; 32] = array_ref!(&signature.0, 32, 32); let top_half: &[u8; 32] = array_ref!(&signature.0, 32, 32);
let bottom_half: &[u8; 32] = array_ref!(&signature.0, 0, 32); let bottom_half: &[u8; 32] = array_ref!(&signature.0, 0, 32);
h.input(&bottom_half[..]); h.input(&bottom_half[..]);
h.input(&self.to_bytes()); h.input(&self.to_bytes());
h.input(&message); h.input(&message);
digest.copy_from_slice(h.result().as_slice());
let digest_bytes = h.result();
digest = *array_ref!(digest_bytes, 0, 64);
digest_reduced = Scalar::reduce(&digest); digest_reduced = Scalar::reduce(&digest);
r = curve::double_scalar_mult_vartime(&digest_reduced, &a, &Scalar(*top_half)); r = curve::double_scalar_mult_vartime(&digest_reduced, &a, &Scalar(*top_half));