ts-nkeys
Version:
A public-key signature system based on Ed25519 for the NATS ecosystem in typescript for ts-nats and node-nats
69 lines • 2.43 kB
JavaScript
;
/*
* Copyright 2018 The NATS Authors
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
Object.defineProperty(exports, "__esModule", { value: true });
// Fork of https://github.com/LinusU/base32-encode
// and https://github.com/LinusU/base32-decode to support returning
// buffers without padding.
var base32 = /** @class */ (function () {
function base32() {
}
base32.encode = function (src) {
var bits = 0;
var value = 0;
var a = new Uint8Array(src);
var buf = Buffer.allocUnsafe(src.byteLength * 2);
var j = 0;
for (var i = 0; i < a.byteLength; i++) {
value = (value << 8) | a[i];
bits += 8;
while (bits >= 5) {
var index = (value >>> (bits - 5)) & 31;
buf[j++] = base32.alphabet.charAt(index).charCodeAt(0);
bits -= 5;
}
}
if (bits > 0) {
var index = (value << (5 - bits)) & 31;
buf[j++] = base32.alphabet.charAt(index).charCodeAt(0);
}
return buf.slice(0, j);
};
base32.decode = function (src) {
var bits = 0;
var byte = 0;
var j = 0;
var a = new Uint8Array(src);
var out = Buffer.alloc(a.byteLength * 5 / 8 | 0);
for (var i = 0; i < a.byteLength; i++) {
var v = String.fromCharCode(a[i]);
var vv = base32.alphabet.indexOf(v);
if (vv === -1) {
throw new Error("Illegal Base32 character: " + a[i]);
}
byte = (byte << 5) | vv;
bits += 5;
if (bits >= 8) {
out[j++] = (byte >>> (bits - 8)) & 255;
bits -= 8;
}
}
return out.slice(0, j);
};
base32.alphabet = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ234567';
return base32;
}());
exports.base32 = base32;
//# sourceMappingURL=base32.js.map