RanchiMall/fcoin
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ec: refactor.

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This commit is contained in:
Christopher Jeffrey 2016-06-12 00:27:40 -07:00
parent 8471ce165d
commit 9ccac80ad6
No known key found for this signature in database
GPG Key ID: 8962AB9DE6666BBD
1 changed files with 17 additions and 19 deletions
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36
lib/bcoin/ec.js
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@ -104,7 +104,8 @@ ec.random = function random(size) {
*/
ec.rand = function rand(min, max) {
return Math.floor((ec.random(1)[0] / 256) * (max - min) + min);
var num = ec.random(4).readUInt32LE(0, true);
return Math.floor((num / 0x100000000) * (max - min) + min);
};
/**
@ -252,10 +253,9 @@ ec.sign = function sign(msg, key) {
*/
ec.normalizeLength = function normalizeLength(sig) {
var data, p, len, rlen, slen;
data = sig.slice();
p = { place: 0 };
var data = sig;
var p = { place: 0 };
var len, rlen, slen;
if (data[p.place++] !== 0x30)
return sig;
@ -283,16 +283,21 @@ ec.normalizeLength = function normalizeLength(sig) {
function getLength(buf, p) {
var initial = buf[p.place++];
if (!(initial & 0x80)) {
var octetLen, val, i, off;
if (!(initial & 0x80))
return initial;
}
var octetLen = initial & 0xf;
var val = 0;
for (var i = 0, off = p.place; i < octetLen; i++, off++) {
octetLen = initial & 0xf;
val = 0;
for (i = 0, off = p.place; i < octetLen; i++, off++) {
val <<= 8;
val |= buf[off];
}
p.place = off;
return val;
}
@ -303,9 +308,7 @@ function getLength(buf, p) {
*/
ec.isLowS = function isLowS(sig) {
if (!sig.s) {
assert(Buffer.isBuffer(sig));
if (Buffer.isBuffer(sig)) {
try {
sig = new ec.signature(sig);
} catch (e) {
@ -313,9 +316,6 @@ ec.isLowS = function isLowS(sig) {
}
}
if (sig.s.cmpn(0) <= 0)
return false;
// If S is greater than half the order,
// it's too high.
if (sig.s.cmp(ec.elliptic.nh) > 0)
@ -332,9 +332,7 @@ ec.isLowS = function isLowS(sig) {
*/
ec.toLowS = function toLowS(sig) {
if (!sig.s) {
assert(Buffer.isBuffer(sig));
if (Buffer.isBuffer(sig)) {
try {
sig = new ec.signature(sig);
} catch (e) {