Current Dev State

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Tim Lorsbach
2025-06-23 20:13:54 +02:00
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# minimalistic-crypto-utils
[![Build Status](https://secure.travis-ci.org/indutny/minimalistic-crypto-utils.svg)](http://travis-ci.org/indutny/minimalistic-crypto-utils)
[![NPM version](https://badge.fury.io/js/minimalistic-crypto-utils.svg)](http://badge.fury.io/js/minimalistic-crypto-utils)
Very minimal utils that are required in order to write reasonable JS-only
crypto module.
## Usage
```js
const utils = require('minimalistic-crypto-utils');
utils.toArray('abcd', 'hex');
utils.encode([ 1, 2, 3, 4 ], 'hex');
utils.toHex([ 1, 2, 3, 4 ]);
```
#### LICENSE
This software is licensed under the MIT License.
Copyright Fedor Indutny, 2017.
Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to permit
persons to whom the Software is furnished to do so, subject to the
following conditions:
The above copyright notice and this permission notice shall be included
in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
USE OR OTHER DEALINGS IN THE SOFTWARE.
[0]: http://tools.ietf.org/html/rfc6979
[1]: https://github.com/indutny/bn.js
[2]: https://github.com/indutny/hash.js
[3]: https://github.com/bitchan/eccrypto
[4]: https://github.com/wanderer/secp256k1-node

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'use strict';
var utils = exports;
function toArray(msg, enc) {
if (Array.isArray(msg))
return msg.slice();
if (!msg)
return [];
var res = [];
if (typeof msg !== 'string') {
for (var i = 0; i < msg.length; i++)
res[i] = msg[i] | 0;
return res;
}
if (enc === 'hex') {
msg = msg.replace(/[^a-z0-9]+/ig, '');
if (msg.length % 2 !== 0)
msg = '0' + msg;
for (var i = 0; i < msg.length; i += 2)
res.push(parseInt(msg[i] + msg[i + 1], 16));
} else {
for (var i = 0; i < msg.length; i++) {
var c = msg.charCodeAt(i);
var hi = c >> 8;
var lo = c & 0xff;
if (hi)
res.push(hi, lo);
else
res.push(lo);
}
}
return res;
}
utils.toArray = toArray;
function zero2(word) {
if (word.length === 1)
return '0' + word;
else
return word;
}
utils.zero2 = zero2;
function toHex(msg) {
var res = '';
for (var i = 0; i < msg.length; i++)
res += zero2(msg[i].toString(16));
return res;
}
utils.toHex = toHex;
utils.encode = function encode(arr, enc) {
if (enc === 'hex')
return toHex(arr);
else
return arr;
};

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{
"_from": "minimalistic-crypto-utils@^1.0.0",
"_id": "minimalistic-crypto-utils@1.0.1",
"_inBundle": false,
"_integrity": "sha1-9sAMHAsIIkblxNmd+4x8CDsrWCo=",
"_location": "/minimalistic-crypto-utils",
"_phantomChildren": {},
"_requested": {
"type": "range",
"registry": true,
"raw": "minimalistic-crypto-utils@^1.0.0",
"name": "minimalistic-crypto-utils",
"escapedName": "minimalistic-crypto-utils",
"rawSpec": "^1.0.0",
"saveSpec": null,
"fetchSpec": "^1.0.0"
},
"_requiredBy": [
"/elliptic",
"/hmac-drbg"
],
"_resolved": "https://registry.npmjs.org/minimalistic-crypto-utils/-/minimalistic-crypto-utils-1.0.1.tgz",
"_shasum": "f6c00c1c0b082246e5c4d99dfb8c7c083b2b582a",
"_spec": "minimalistic-crypto-utils@^1.0.0",
"_where": "/home/manfred/enviPath/ketcher2/ketcher/node_modules/elliptic",
"author": {
"name": "Fedor Indutny",
"email": "fedor@indutny.com"
},
"bugs": {
"url": "https://github.com/indutny/minimalistic-crypto-utils/issues"
},
"bundleDependencies": false,
"deprecated": false,
"description": "Minimalistic tools for JS crypto modules",
"devDependencies": {
"mocha": "^3.2.0"
},
"homepage": "https://github.com/indutny/minimalistic-crypto-utils#readme",
"keywords": [
"minimalistic",
"utils",
"crypto"
],
"license": "MIT",
"main": "lib/utils.js",
"name": "minimalistic-crypto-utils",
"repository": {
"type": "git",
"url": "git+ssh://git@github.com/indutny/minimalistic-crypto-utils.git"
},
"scripts": {
"test": "mocha --reporter=spec test/*-test.js"
},
"version": "1.0.1"
}

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'use strict';
const assert = require('assert');
const utils = require('../');
describe('utils', () => {
it('should convert to array', () => {
assert.deepEqual(utils.toArray('1234', 'hex'), [ 0x12, 0x34 ]);
assert.deepEqual(utils.toArray('1234'), [ 49, 50, 51, 52 ]);
assert.deepEqual(utils.toArray('1234', 'utf8'), [ 49, 50, 51, 52 ]);
assert.deepEqual(utils.toArray('\u1234234'), [ 18, 52, 50, 51, 52 ]);
assert.deepEqual(utils.toArray([ 1, 2, 3, 4 ]), [ 1, 2, 3, 4 ]);
});
it('should zero pad byte to hex', () => {
assert.equal(utils.zero2('0'), '00');
assert.equal(utils.zero2('01'), '01');
});
it('should convert to hex', () => {
assert.equal(utils.toHex([ 0, 1, 2, 3 ]), '00010203');
});
it('should encode', () => {
assert.deepEqual(utils.encode([ 0, 1, 2, 3 ]), [ 0, 1, 2, 3 ]);
assert.deepEqual(utils.encode([ 0, 1, 2, 3 ], 'hex'), '00010203');
});
});