Convert PHP hash_hmac(sha512) to NodeJS

Question

Convert PHP hash_hmac(sha512) to NodeJS

I am porting a php script to node, and I don't know much about encryption.

The php script uses this function:

hash_hmac('sha512', text, key);

So, I need to implement a function in Node js for returning a keyed hash using the hmac method (SHA512).

From what I can see, node has this functionality built in via the crypto module (http://nodejs.org/docs/latest/api/crypto.html#crypto_crypto) -- But I unclear how to reproduce this function.

Any help would be appreciated.

Thanks,

javascript
node.js
hash
hmac

Answer 1

Yes, use the crypto library.

var hash = crypto.createHmac('sha512');
hash.update(data);
var hashed_data = hash.digest();

More details (e.g. arguments to digest to control the output encoding from hash.digest) are at the link you provided.

As Nick points out, you will need to do this entire process each time you want to encrypt a new string (i.e. create a new hash object via crypto.createHmac.)