md5 file checksum from image buffer in javascript

You can use the built-in crypto module in Node.js to generate the MD5 checksum of a file as follows:

index.tsx
const crypto = require('crypto');

// assuming 'imgData' is a buffer containing image data
const hash = crypto.createHash('md5').update(imgData).digest('hex');

console.log(hash); // prints the MD5 checksum of the buffer
221 chars
7 lines

In the above code, we first include the crypto module to access the hash functionality. Then we create a Hash object with the createHash method and specify the algorithm as md5. We update the hash with the image buffer using the update method and finally generate the checksum in hexadecimal format using the digest method.

Note that if you want to compute the checksum of a file stored on disk, you need to read it into a buffer first. You can use the fs module to read the file and then pass the buffer to the update method.