![]() As our code runs outside of a browser and due to the problems associated with encoding and decoding UTF-16-bit DOMString, we will be encoding and decoding 64-bit Big Integers to Big endian bytes and vice versa using the Buffer class including writeBigUInt64BE() and readBigUInt64BE() methods: _// allocate Buffer instance_ On the browser, Javascript offers two functions for decoding and encoding base64 strings, btoa() and atob(), see Base64. Next we create our encryption class by updating encryption.ts as follows: gitignore file to prevent our environmental variables from getting into source control for security reasons. env.example file to place all the keys of the. env file to store our environmental variables and. Next, we need create our src directory and then our library file as follows: $ mkdir src We also need to install dotenv to load environment variables from an. We will be using the Buffer class to write and read unsigned 64-bit integers because JavaScript has a maximum safe integer of 53 bits and our library must be able to handle 64-bit big endian especially when we need to encrypt and decrypt large integers such as phone numbers. This module provides us cryptographic functionalities like OpenSSL's hash, cipher, decipher, sign, verify and HMAC functions. Note that the NPM's crypto module has been deprecated as it is now a built-in Node module. Next, we need to install some additional packages for our library. This will generate an initial **tsconfig.json** file at the root of the project with possible configuration options, with non-essential options commented out. We initialize a tsconfig.json file as follows: $ yarn tsc -init -rootDir src -outDir dist $ yarn add -D ts-node we need to add a tsconfig.json file to the root of our project for our Typescript configuration. Next, we need to install **ts-node** to enable us execute Typescript files without needing to compile them and also. This is because we will be compiling our Typescript code into JavaScript for our production build. Next, we need to install Typescript as a dev dependency. Initialize package.json for the project: $ yarn init -y Next, we create our project folder and set up typescript: $ mkdir encrypt-decrypt-library I also prefer using NVM to manage my Node versions. You also need to have npm and/or yarn globally installed. Automated testing, version management and package publishing using GitHub, CircleCI and Semantic release.Buffer - subclass of JavaScript's Uint8Array class used for character encoding and decoding.Crypto - built-in Node.js module which provides cryptographic functionality.Symmetric Encryption - cryptographic encryption technique which uses the same encryption keys for both encryption and decryption of data.TypeScript - adds static typed definitions to JavaScript.For this article, I will demonstrate how you can create a simple, secure and fast symmetric encryption solution to encrypt data, and applied across any application even as short, SEO-friendly URL parameters using the following tools:. Simply using Base64 encoding, which will obfuscate and create short tokens is not a reliable security solution as Base64 strings can be easily decoded. Essentially: const value = 0123456789 // Initial valueĬonst token = encrypt(value) // Encrypted tokenĬonst decryptedValue = decrypt(token) // Decrypted value In that project and some applications, where we want to encode and encrypt sensitive data, we also need to be able to decode and decrypt this information, when we need it, anywhere in our application, as such that the decrypted value is not altered during the process ensuring Data Integrity. This means that the same encryption key must be used to decrypt the data. In this case, we both shared the same encryption key, a process known as Symmetric Encryption. However, JavaScript has the problem of not properly handling large integers, as it can only store signed or unsigned integers of up to 53 bits. Ruby provides straightforward handling for signed and unsigned big endians using pack() and unpack() methods for accessing underlying bits and bytes. It involved how we could safely pass identifiable user information such as phone numbers encoded and encrypted by a third party service in Ruby, to be decrypted and decoded into our application for the user. In a project that I worked on a while ago, I was presented with a problem that wasn't very unique. LinkedIn logo for sharing a link Twitter logo for sharing a link Reddit logo for sharing a link
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