Install Crypto Module<\/h3>\n\n\n\n
If you have installed Node.js by manual build then there is a chance that the ‘crypto’<\/strong> is not shipped with it. You can run this command to install the ‘crypto’<\/strong> dependency.<\/p>\n\n\n You don’t need to do that if you have installed it using pre-built packages.<\/em><\/p>\n\n\n\n Let’s now write code for encrypting and decrypting data. Let’s start with a basic setup.<\/p>\n\n\n\n Step 1:<\/strong> Create a new folder & open it on the code editor.<\/p>\n\n\n\n Step 2:<\/strong> Create a file ‘aap.js’<\/strong> inside that folder.<\/p>\n\n\n\n Step 3: <\/strong>Open the terminal & type the below command. This initializes the Node Packages Manager, by which we can install any Node.js framework.<\/p>\n\n\n Step 4: <\/strong>Inside the terminal, type the below command to install ‘crypto’<\/strong> as a dependency in the project folder.<\/p>\n\n\n Step 5: <\/strong>Open the ‘app.js’<\/strong> file and write the following code for data encryption and decryption.<\/p>\n\n\n\n app.js<\/em><\/strong><\/p>\n\n\n Explanation:<\/strong><\/p>\n\n\n\n Run the Application<\/strong><\/p>\n\n\n\n The code is written in a single file ‘app.js’<\/strong> that runs on executing the below command in the terminal.<\/p>\n\n\n Output:<\/strong><\/p>\n\n\n\n In the above section, we have done encryption and decryption of a string. To encrypt and decrypt buffers, you can simply pass the buffer in place of the string during the function call and it will encrypt and decrypt it accordingly.<\/p>\n\n\n\n app.js<\/em><\/strong><\/p>\n\n\n Output:<\/strong><\/p>\n\n\n\n You can also pipe the streams into the encrypt() function to have secure encrypted data passing through the streams.<\/p>\n\n\n\n In this article, we have discovered the crypto <\/strong>module provides different functions for performing encryption and decryption in Node.js applications. This is done in order to secure data, to protect sensitive data from malicious parties. We can use this module to convert plain text into unreadable text and vice versa. We can either encrypt & decrypt both plain text or buffer data. Hope you have enjoyed reading the content. Check out more interesting articles on NodeJS below.<\/p>\n\n\n\n Read More:<\/strong><\/p>\n\n\n\n\nnpm install crypto --save\n<\/pre><\/div>\n\n\n
Encrypt and Decrypt Data in Node.js<\/h2>\n\n\n\n
\nnpm init -y\n<\/pre><\/div>\n\n\n
\nnpm install crypto --save\n<\/pre><\/div>\n\n\n
\nconst crypto = require('crypto'); \/\/ Import the crypto module\nconst algorithm = 'aes-256-cbc'; \/\/ Use AES 256-bit encryption\nconst key = crypto.randomBytes(32); \/\/ Generate a random 32-byte key\nconst iv = crypto.randomBytes(16); \/\/ Generate a random 16-byte IV\n\nfunction encrypt(data) { \/\/ Function to encrypt data\n let cipher = crypto.createCipheriv('aes-256-cbc', Buffer.from(key), iv);\n let encrypted = cipher.update(data);\n encrypted = Buffer.concat([encrypted, cipher.final()]);\n return {\n iv: iv.toString('hex'),\n encryptedData: encrypted.toString('hex')\n };\n}\n\nfunction decrypt(data) { \/\/ Function to decrypt data\n let iv = Buffer.from(data.iv, 'hex');\n let encryptedText = Buffer.from(data.encryptedData, 'hex');\n let decipher = crypto.createDecipheriv('aes-256-cbc', Buffer.from(key), iv);\n let decrypted = decipher.update(encryptedText);\n decrypted = Buffer.concat([decrypted, decipher.final()]);\n return decrypted.toString();\n}\n\nvar data = "Username & Password" \/\/ Data to be encrypted\n\nvar encrypted = encrypt(data); \/\/ Encrypt the data\nconsole.log("Encrypt Data: ", encrypted)\n\nvar decrypted = decrypt(encrypted); \/\/ Decrypt the data\nconsole.log("Decrypt Data: ", decrypted)\n<\/pre><\/div>\n\n\n\n
\nnode app.js\n<\/pre><\/div>\n\n\n
![\"Encrypt](\"https:\/\/codeforgeek.com\/wp-content\/uploads\/2023\/10\/encrypt-decrpyt-string-1024x543.png\")
<\/figure>\n\n\n\nEncrypt and Decrypt Buffer in Node.js<\/h2>\n\n\n\n
\nconst crypto = require('crypto'); \/\/ Import the crypto module\nconst algorithm = 'aes-256-cbc'; \/\/ Use AES 256-bit encryption\nconst key = crypto.randomBytes(32); \/\/ Generate a random 32-byte key\nconst iv = crypto.randomBytes(16); \/\/ Generate a random 16-byte IV\n\nfunction encrypt(data) { \/\/ Function to encrypt data\n let cipher = crypto.createCipheriv('aes-256-cbc', Buffer.from(key), iv);\n let encrypted = cipher.update(data);\n encrypted = Buffer.concat([encrypted, cipher.final()]);\n return {\n iv: iv.toString('hex'),\n encryptedData: encrypted.toString('hex')\n };\n}\n\nfunction decrypt(data) { \/\/ Function to decrypt data\n let iv = Buffer.from(data.iv, 'hex');\n let encryptedText = Buffer.from(data.encryptedData, 'hex');\n let decipher = crypto.createDecipheriv('aes-256-cbc', Buffer.from(key), iv);\n let decrypted = decipher.update(encryptedText);\n decrypted = Buffer.concat([decrypted, decipher.final()]);\n return decrypted.toString();\n}\n\nvar data = "Username & Password" \/\/ Data to be encrypted\n\nvar buffer = Buffer.from(data); \/\/ Convert the data to a buffer\n\nvar encrypted = encrypt(buffer); \/\/ Encrypt the data\n\nconsole.log(encrypted);\n\nvar decrypted = decrypt(encrypted); \/\/ Decrypt the data\nconsole.log(decrypted);\n<\/pre><\/div>\n\n\n![\"Encrypt](\"https:\/\/codeforgeek.com\/wp-content\/uploads\/2023\/10\/encrypt-decrpyt-buffer-1-1024x545.png\")
<\/figure>\n\n\n\nConclusion<\/h2>\n\n\n\n