kris/nobs
1
0
Fork 0
mirror of https://github.com/henrydcase/nobs.git synced 2024-11-22 23:28:57 +00:00
Code Issues Releases Wiki Activity

Doc

Browse Source
This commit is contained in:
Henry Case 2018-08-21 12:02:30 +01:00
parent b769c88767
commit d6fc82531f
3 changed files with 7 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
dh/sidh/api.go
View File

@ -180,12 +180,12 @@ func GeneratePublicKey(prv *PrivateKey) (*PublicKey, error) {
} }
} }
// Computes a shared secret. Function requires that pub has different KeyVariant than // Computes a shared secret which is a j-invariant. Function requires that pub has
// prv. // different KeyVariant than prv. Length of returned output is 2*ceil(log_2 P)/8),
// where P is a prime defining finite field.
// //
// Function returns shared secret that can be used as a symmetric key. It's important // It's important to notice that each keypair must not be used more than once
// to notice that each keypair must not be used more than once to calculate // to calculate shared secret.
// shared secret.
// //
// Function may return error. This happens only in case provided input is invalid. // Function may return error. This happens only in case provided input is invalid.
// Constant time for properly initialized private and public key. // Constant time for properly initialized private and public key.

2
dh/sidh/internal/p751/curve.go
View File

@ -294,7 +294,7 @@ func (x3P *ProjectivePoint) Pow3k(params *CurveCoefficientsEquiv, xP *Projective
t1.Sub(&t1, &t2) // t1 = t1 - t2 t1.Sub(&t1, &t2) // t1 = t1 - t2
t5.Mul(&t3, &params.A) // t5 = t3 * A24+ t5.Mul(&t3, &params.A) // t5 = t3 * A24+
t3.Mul(&t3, &t5) // t3 = t5 * t3 t3.Mul(&t3, &t5) // t3 = t5 * t3
t6.Mul(&params.C, &t2) // t6 = t2 * A24- t6.Mul(&t2, &params.C) // t6 = t2 * A24-
t2.Mul(&t2, &t6) // t2 = t2 * t6 t2.Mul(&t2, &t6) // t2 = t2 * t6
t3.Sub(&t2, &t3) // t3 = t2 - t3 t3.Sub(&t2, &t3) // t3 = t2 - t3
t2.Sub(&t5, &t6) // t2 = t5 - t6 t2.Sub(&t5, &t6) // t2 = t5 - t6

2
dh/sidh/internal/p751/isogeny.go
View File

@ -88,7 +88,7 @@ func (phi *isogeny3) EvaluatePoint(p *ProjectivePoint) ProjectivePoint {
t2.Square(&t2) // t2 = t2 ^ 2 t2.Square(&t2) // t2 = t2 ^ 2
t0.Square(&t0) // t0 = t0 ^ 2 t0.Square(&t0) // t0 = t0 ^ 2
q.X.Mul(px, &t2) // XQ'= XQ * t2 q.X.Mul(px, &t2) // XQ'= XQ * t2
q.Z.Mul(pz, &t0) // XZ'= ZQ * t0 q.Z.Mul(pz, &t0) // ZQ'= ZQ * t0
return q return q
} }