NodeJS SHA1 get raw output (PHP SHA1 raw output equivalent)

Question

In PHP, the code below returns the raw output of the SHA1 of the "string"

sha1("string", true);

What is the nodeJS equivalent of getting the SHA1 raw output?

Edit: I made some test and this line:

crypto.createHash('sha1').update('string').digest('base64');

generates same output as php's

base64_encode(sha1('string', true));

My issue occurs when I try to concatenate a string and the result of sha1, the get the sha1 again:

base64_encode(sha1(sha1("string", true) . "another string", true))

Different with nodejs:

var stringhash = crypto.createHash('sha1').update('string').digest();
crypto.createHash('sha1').update("another string" + stringhash).digest('base64')

robertklep · Accepted Answer · 2017-09-28 08:25:08Z

4

Something like this:

const crypto = require('crypto');
let digest   = crypto.createHash('sha1').update('string').digest();
process.stdout.write( digest );

EDIT: the equivalent of your second example:

let hash1  = crypto.createHash('sha1').update('string').digest();
let hash2  = crypto.createHash('sha1').update(hash1).update('another string');
let digest = hash2.digest('base64');

edited Sep 28, 2017 at 8:25

answered Sep 27, 2017 at 11:21

robertklep

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2 Comments

whoknows Over a year ago

Based on nodejs documentation, in .digest(): "If encoding is provided a string will be returned; otherwise a Buffer is returned." "Buffer" is the equivalent of the raw output of PHP's sha1?

robertklep Over a year ago

@whoknows a Buffer in Node.js contains binary ("raw") data in the form of a UInt8Array, which is likely equivalent to what the PHP code returns.

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