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ECPair: fix modulo bias in makeRandom

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This commit is contained in:
Daniel Cousens 2015-08-21 16:46:18 +10:00
parent e5e24256fd
commit 252336ab8c
1 changed files with 7 additions and 4 deletions
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11
src/ecpair.js
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@ -105,11 +105,14 @@ ECPair.makeRandom = function (options) {
options = options || {}
var rng = options.rng || randomBytes
var buffer = rng(32)
typeforce(types.Buffer256bit, buffer)
var d = BigInteger.fromBuffer(buffer)
d = d.mod(secp256k1.n)
var d
do {
var buffer = rng(32)
typeforce(types.Buffer256bit, buffer)
d = BigInteger.fromBuffer(buffer)
} while (d.compareTo(secp256k1.n) > 0)
return new ECPair(d, null, options)
}