hasha

Hasha is an open-source JavaScript library for Node.js that provides a simple interface to compute hash digests and file checksums. It was created by Sindre Sorhus and published on the npm registry to aid developers in verifying data integrity during software development and deployment. Hasha is designed to be a lightweight wrapper around the Node.js crypto module, supporting a variety of input sources and output formats.

Key features include support for multiple hash algorithms (such as md5, sha1, sha256, sha512, and others), the ability to compute several digests in a single pass, and both asynchronous and synchronous APIs. Hasha can calculate hashes from a file path, a buffer, or a stream, making it versatile for use in build pipelines, tests, and runtime checks. Outputs can be produced in different encodings, typically hex or base64, depending on the options chosen.

Common usage patterns involve hashing a file or a buffer with a promise-based API or a synchronous variant. For example, hashing a file with sha256:

const hasha = require('hasha');

hasha.fromFile('path/to/file', { algorithm: 'sha256' }).then(hash => {

console.log(hash);

});

For synchronous usage:

const hashSync = hasha.fromFileSync('path/to/file', { algorithm: 'sha256' });

console.log(hashSync);

Hasha is widely adopted in Node.js projects to streamline integrity checks and reproducible builds, offering a straightforward approach to obtaining hash digests across multiple algorithms with minimal boilerplate.