# pkcs7 > Add and remove pkcs7-style padding. Latest version **1.0.4** (published 2020-09-09) · Apache-2.0 license · 0 weekly downloads ## Install ```sh npm install pkcs7 pnpm add pkcs7 yarn add pkcs7 bun add pkcs7 ``` Provides the command `pkcs7`. ## Health **Score 30/100 (F)** — status: abandoned. Positive: esm support; no vulnerabilities. Warnings: low downloads; no types. Negative: abandoned. ## Facts | | | |---|---| | Version | 1.0.4 | | Published | 2020-09-09 | | First published | 2014-07-28 | | Weekly downloads | 0 | | License | Apache-2.0 | | TypeScript types | none | | Module format | ESM + CommonJS | | Dependencies | 1 | | Unpacked size | 22.8 KB | | Known vulnerabilities | 0 | | Install scripts | no | | GitHub stars | 22 | | Author | Brightcove | | Maintainers | jcarfagno-bc, albshin, hkanagarajan, ingrid.s.cruz, cmarquez, tomson.george, carlosabajo, ericramos, palvarezbc, jasilvaantonio, nhaseena.mohamed, hrodriguez2, skumar85, granganathan, lauralopez, vnavarro, quillad, attinder, priyadharsshini, ogutierrez, agarciabcov, syurishi, fdelgado_bc, tshutt, rollocasanova, rociosantos, rahul.yadav, anand.gangadharan, kkashalkar, bvilvanathan, rodrigo.perez, arunjeyaprasad, mbalasubramaniam, cavieira, lescorcio, scorreia, jmpmacedo, bzizmond, dmkelly, xgarcia, sndy35, muthukumar.bc, chrisbanning, pdohertybcov, schhabra, mgonzalez_bc, ilunabcove, omartinez, vchistyakov, cvillasenor, ackbabe, etobin, dnortonbcov, bcpsalas, javibright, diegocruz1991, jorduno, ipadilla, marcogaray, gcastillobc, egoulding, sgopalakrishna, acruzr, psousa, erodrigues, carredondo, jcueto, cpayan, eledezma, bc-jcarlson, tteixeira, bmartinez, jgouveia, barroyo, manisha.sh, biswaranjan, bzhang-bcov, dchavez, jsepulveda, paco_oblea_bc, bcmauleon, mdeltorob, jblaker, jcapitao, hwoodbury, jedwards53, andydangerous, asinclair, stuartmh, elbadawimustafa, mtolanbc, mcarreiro, zhongqil, bc_rpeck, syseng, ekelson-bcove, revinkey, tnwanna, adalwani, gastafurov, mjholland, wswanbeck, khaipham, jonbwalsh, gnorth, bcabice, amanningbcov, sumeetdubey, lbx-dev, larsmaultsby, rjune, quicklyfrozen, salleko, jack.terranova, brightcove-admin, gkatsev, tedk, abradley-brightcove, bc-alive, misteroneill, mrocajr, forbesjo, brandonocasey, gesinger, violettemi, apadhye, marguinbc, brightcove-user, kmason, tomruggs, bsahlas, lday, cbarstow, jmingolla-bcov, pdias, misterben, twalling, jwhisenant, mjneil, abarstow, rtezera1, dmlap | | Keywords | pkcs7, pkcs7 encrypt decrypt padding pkcs, videojs, videojs-plugin | ## Links - npm: https://www.npmjs.com/package/pkcs7 - Repository: https://github.com/brightcove/pkcs7 - Issues: https://github.com/brightcove/pkcs7/issues - npm.io page: https://npm.io/package/pkcs7 ## Dependencies (1) - [@babel/runtime](https://npm.io/package/@babel/runtime.md) ^7.5.5 ## Alternatives - [@sindresorhus/slugify](https://npm.io/package/@sindresorhus/slugify.md) — 3.7M weekly downloads - [solid-js](https://npm.io/package/solid-js.md) — 2.7M weekly downloads - [expo-glass-effect](https://npm.io/package/expo-glass-effect.md) — 2.5M weekly downloads - [nanoassert](https://npm.io/package/nanoassert.md) — 780.8K weekly downloads - [@ffmpeg/ffmpeg](https://npm.io/package/@ffmpeg/ffmpeg.md) — 529.5K weekly downloads ## Recent versions - 1.0.4 (latest) — 2020-09-09 - 1.0.3 (experimental) — 2019-08-21 - 1.0.3-1 (next) — 2019-08-16 - 1.0.3-0 — 2019-08-16 - 1.0.2 — 2017-06-02 - 1.0.1 — 2017-06-02 - 1.0.0 — 2017-06-02 - 0.2.3 — 2015-01-13 - 0.2.2 — 2014-08-01 - 0.2.1 — 2014-07-31 - 0.2.0 — 2014-07-31 - 0.1.1 — 2014-07-29 - 0.1.0 — 2014-07-28 ## README # pkcs7 [![Build Status](https://travis-ci.org/brightcove/pkcs7.svg?branch=master)](https://travis-ci.org/brightcove/pkcs7) [![Greenkeeper badge](https://badges.greenkeeper.io/brightcove/pkcs7.svg)](https://greenkeeper.io/) [![Slack Status](http://slack.videojs.com/badge.svg)](http://slack.videojs.com) [![NPM](https://nodei.co/npm/pkcs7.png?downloads=true&downloadRank=true)](https://nodei.co/npm/pkcs7/) > Add and remove pkcs7-style padding. **Table of Contents** *generated with [DocToc](https://github.com/thlorenz/doctoc)* - [Getting Started](#getting-started) - [Documentation](#documentation) - [Examples](#examples) - [Contributing](#contributing) - [License](#license) ## Getting Started Install the module with: `npm install pkcs7` ```js var pkcs7 = require('pkcs7'), encrypted; // pad a buffer! enctcrypted = encrypt(pkcs7.pad(buffer)); // later, you can unpad it: console.log('the secret is out! ' + pkcs7.unpad(decrypt(encrypted))); ``` Install with cli command ```sh $ npm install -g pkcs7 $ pkcs7 --help $ pkcs7 --version ``` ## Documentation PKCS#7 padding a really simple transformation some crytographic algorithms use to ensure the number of input bytes is a multiple of some constant. Here's how it works: 01 -- if lth mod k = k-1 02 02 -- if lth mod k = k-2 . . . k k ... k k -- if lth mod k = 0 `k` is the constant value the encryption algorithm wants your input to be a multiple of. This project assumes `k` is *always* sixteen. Not much to it, right? If reading specs is your thing, check out [RFC 5652](http://tools.ietf.org/html/rfc5652). ## Examples You can run pkcs7 from the command line: ```shell # pad a string generated by echo and the hex dump the result echo -n "0123456789AB" | pkcs7 | xxd ``` ## Contributing In lieu of a formal styleguide, take care to maintain the existing coding style. Add unit tests for any new or changed functionality. Lint and test your code using [Grunt](http://gruntjs.com). ## License Copyright (c) 2014 Brightcove Licensed under the Apache-2 license. --- _Source: https://npm.io/package/pkcs7 · Machine-readable twin of the npm.io package page. Health data is recomputed on every publish._