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my-app/node_modules/@tufjs/canonical-json/LICENSE
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my-app/node_modules/@tufjs/canonical-json/LICENSE
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MIT License
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Copyright (c) 2022 GitHub and the TUF Contributors
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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my-app/node_modules/@tufjs/canonical-json/README.md
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my-app/node_modules/@tufjs/canonical-json/README.md
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# @tufjs/canonical-json
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JSON canonicalization compliant with the [OLPC Canonical JSON specification][1].
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## Why
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If you're looking for [RFC 8785][2] compliant JSON canonicalization there are
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[any][3] [number][4] [of][5] [libraries][6] [to][7] [choose][8] [from][9].
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You should only select this library if you know that you specifically need
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support for the [OLPC][1]-style of canonicalization.
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One reason you might chose OLPC compliance is for interoperability with
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[The Update Framework][10] which specifically calls out OLPC as the
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canonicalization standard for computing signatures over TUF metadata.
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The canonicalized strings generated by this library are compatible with those
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generated by the Python-based [securesystemslib][11] library and the Go-based
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[go-securesystemslib][12] library.
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## Installation
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```console
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npm install @tufjs/canonical-json
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```
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## Usage
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```javascript
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const json = require('@tufjs/canonical-json')
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const obj = {
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bool: true,
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num: 42,
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ary: [1, 2, 3],
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str: "foo\\bar"
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}
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console.log(json.canonicalize(obj))
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// output: {"ary":[1,2,3],"bool":true,"num":42,"str":"foo\\bar"}
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```
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[1]: https://wiki.laptop.org/go/Canonical_JSON
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[2]: https://www.rfc-editor.org/rfc/rfc8785
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[3]: https://www.npmjs.com/package/@stratumn/canonicaljson
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[4]: https://www.npmjs.com/package/@truestamp/canonify
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[5]: https://www.npmjs.com/package/canonical-json
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[6]: https://www.npmjs.com/package/canonicalize
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[7]: https://www.npmjs.com/package/canonicalize-json
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[8]: https://www.npmjs.com/package/json-canonicalize
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[9]: https://www.npmjs.com/package/another-json
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[10]: https://theupdateframework.github.io/specification/latest/#metaformat
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[11]: https://github.com/secure-systems-lab/securesystemslib
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[12]: https://github.com/secure-systems-lab/go-securesystemslib
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my-app/node_modules/@tufjs/canonical-json/lib/index.d.ts
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my-app/node_modules/@tufjs/canonical-json/lib/index.d.ts
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// eslint-disable-next-line @typescript-eslint/no-explicit-any
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export const canonicalize: (object: any) => string;
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my-app/node_modules/@tufjs/canonical-json/lib/index.js
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my-app/node_modules/@tufjs/canonical-json/lib/index.js
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const COMMA = ',';
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const COLON = ':';
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const LEFT_SQUARE_BRACKET = '[';
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const RIGHT_SQUARE_BRACKET = ']';
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const LEFT_CURLY_BRACKET = '{';
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const RIGHT_CURLY_BRACKET = '}';
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// Recursively encodes the supplied object according to the canonical JSON form
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// as specified at http://wiki.laptop.org/go/Canonical_JSON. It's a restricted
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// dialect of JSON in which keys are lexically sorted, floats are not allowed,
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// and only double quotes and backslashes are escaped.
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function canonicalize(object) {
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const buffer = [];
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if (typeof object === 'string') {
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buffer.push(canonicalizeString(object));
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} else if (typeof object === 'boolean') {
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buffer.push(JSON.stringify(object));
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} else if (Number.isInteger(object)) {
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buffer.push(JSON.stringify(object));
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} else if (object === null) {
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buffer.push(JSON.stringify(object));
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} else if (Array.isArray(object)) {
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buffer.push(LEFT_SQUARE_BRACKET);
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let first = true;
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object.forEach((element) => {
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if (!first) {
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buffer.push(COMMA);
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}
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first = false;
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buffer.push(canonicalize(element));
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});
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buffer.push(RIGHT_SQUARE_BRACKET);
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} else if (typeof object === 'object') {
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buffer.push(LEFT_CURLY_BRACKET);
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let first = true;
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Object.keys(object)
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.sort()
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.forEach((property) => {
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if (!first) {
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buffer.push(COMMA);
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}
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first = false;
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buffer.push(canonicalizeString(property));
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buffer.push(COLON);
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buffer.push(canonicalize(object[property]));
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});
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buffer.push(RIGHT_CURLY_BRACKET);
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} else {
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throw new TypeError('cannot encode ' + object.toString());
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}
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return buffer.join('');
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}
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// String canonicalization consists of escaping backslash (\) and double
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// quote (") characters and wrapping the resulting string in double quotes.
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function canonicalizeString(string) {
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const escapedString = string.replace(/\\/g, '\\\\').replace(/"/g, '\\"');
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return '"' + escapedString + '"';
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}
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module.exports = {
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canonicalize,
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};
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my-app/node_modules/@tufjs/canonical-json/package.json
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my-app/node_modules/@tufjs/canonical-json/package.json
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{
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"name": "@tufjs/canonical-json",
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"version": "2.0.0",
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"description": "OLPC JSON canonicalization",
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"main": "lib/index.js",
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"typings": "lib/index.d.ts",
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"license": "MIT",
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"keywords": [
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"json",
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"canonical",
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"canonicalize",
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"canonicalization",
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"crypto",
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"signature",
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"olpc"
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],
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"author": "bdehamer@github.com",
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"repository": {
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"type": "git",
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"url": "git+https://github.com/theupdateframework/tuf-js.git"
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},
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"homepage": "https://github.com/theupdateframework/tuf-js/tree/main/packages/canonical-json#readme",
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"bugs": {
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"url": "https://github.com/theupdateframework/tuf-js/issues"
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},
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"files": [
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"lib/"
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],
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"scripts": {
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"test": "jest"
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},
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"engines": {
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"node": "^16.14.0 || >=18.0.0"
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}
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}
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