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ecdsa: 1.6.1 moved to relevant section

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Daniel Cousens 2015-04-10 11:07:30 +10:00
parent e073ee3d46
commit 4f8c7f4348
1 changed files with 4 additions and 2 deletions
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6
src/ecdsa.js
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@ -177,14 +177,16 @@ function recoverPubKey (curve, e, signature, i) {
var nR = R.multiply(n) var nR = R.multiply(n)
assert(curve.isInfinity(nR), 'nR is not a valid curve point') assert(curve.isInfinity(nR), 'nR is not a valid curve point')
// Compute r^-1
var rInv = r.modInverse(n)
// Compute -e from e // Compute -e from e
var eNeg = e.negate().mod(n) var eNeg = e.negate().mod(n)
// 1.6.1 Compute Q = r^-1 (sR - eG) // 1.6.1 Compute Q = r^-1 (sR - eG)
// Q = r^-1 (sR + -eG) // Q = r^-1 (sR + -eG)
var rInv = r.modInverse(n)
var Q = R.multiplyTwo(s, G, eNeg).multiply(rInv) var Q = R.multiplyTwo(s, G, eNeg).multiply(rInv)
curve.validate(Q) curve.validate(Q)
return Q return Q