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Added isHexString and sha256 to utils.

This commit is contained in:
ricmoo 2016-07-20 18:03:46 -04:00
parent 4dbce955ee
commit d0a822f02a
1 changed files with 24 additions and 3 deletions
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27
lib/utils.js
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@ -1,5 +1,6 @@
var BN = require('../node_modules/elliptic/node_modules/bn.js/lib/bn.js');
var hash = require('../node_modules/elliptic/node_modules/hash.js/lib/hash.js');
// See: https://github.com/emn178/js-sha3
@ -180,8 +181,18 @@ function keccak(message) {
};
// Quick sanity check
if (keccak(new Buffer('ricmoo')) !== 'b05e424817fb90aa7a79e9da5c5f94070a316219c6ebb863a9ff7ca357dc9fa9') {
throw new Error('problem with sh3?!');
//if (keccak(new Buffer('ricmoo')) !== 'b05e424817fb90aa7a79e9da5c5f94070a316219c6ebb863a9ff7ca357dc9fa9') {
// throw new Error('problem with sh3?!');
//}
function sha256(data) {
if (typeof(data) === 'string') {
data = new Buffer(data, 'utf8');
} else if (!Buffer.isBuffer(data)) {
throw new Error('must be a sting');
}
return (new Buffer(hash.sha256().update(data).digest('hex'), 'hex'));
}
function sha3(data) {
@ -215,9 +226,17 @@ function bnToBuffer(bn) {
return stripZeros(new Buffer(hex, 'hex'));
}
function isHexString(value, length) {
if (typeof(value) !== 'string' || !value.match(/^0x[0-9A-Fa-f]*$/)) {
return false
}
if (length && value.length !== 2 + 2 * length) { return false; }
return true;
}
function hexOrBuffer(value, name) {
if (!Buffer.isBuffer(value)) {
if (typeof(value) !== 'string' || !value.match(/^0x[0-9A-Fa-f]*$/)) {
if (!isHexString(value)) {
var error = new Error(name ? ('invalid ' + name) : 'invalid hex or buffer');
error.reason = 'invalid hex string';
error.value = value;
@ -250,9 +269,11 @@ module.exports = {
defineProperty: defineProperty,
bnToBuffer: bnToBuffer,
isHexString: isHexString,
hexOrBuffer: hexOrBuffer,
hexlify: hexlify,
stripZeros: stripZeros,
sha256: sha256,
sha3: sha3,
}