How to correctly invoke and use js-hs1?

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How to correctly invoke and use js-hs1?

Asked 4 years, 9 months ago

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I need to encrypt a phrase with SHA1, but as I get nothing back I believe I’m not doing it right! Someone knows how to do it right?

I have the following excerpt from a script, where I have a variable that stores the phrase and then the function that would supposedly return me a SHA1 hash:

const sha1 = require ('js-sha1')

var frase = "when in doubt, leave it out. joshua bloch"
var cryptoFrase = crypto(frase)
alert(cryptoFrase)

function crypto(txt){
    sha1 (resp)
    var hash = sha1.create ()
    hash.update (resp)
    hash.hex ()

    return hash
}

1 answer

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by Murilo Portugal • **2,092** points · Answer 1 · 2019-09-14T15:36:21+00:00

Friend, by your question we can not be sure if you want to calculate the hash on the front (browser) or back (nodejs), but follows below the two ways:

By Navigator

You can use the Subtlecrypto.Digest() which already comes embedded in the browsers.
Below is an example:

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
    
    <input type="text" name="texto1" id="texto1">
    <br>
    <input type="button" value="Calcular Hash" onclick="criarHash()">
    <br>
    <textarea name="hashtexto" id="hash" cols="30" rows="10"></textarea>
    
    
    <script>
        async function criarHash() {
            const texto = document.getElementById('texto1').value;
            const buffer = new TextEncoder( 'utf-8' ).encode( texto );
            const digest = await crypto.subtle.digest('SHA-1', buffer);
            const hash = Array.from(new Uint8Array(digest)).map( x => x.toString(16).padStart(2,'0') ).join('');
            document.getElementById('hash').value = hash;    
        }
    </script>
</body>
</html>

Pelo Nodejs

If you are trying to calculate the hash from the back end first you need to install the library js-sha1:

npm i js-sha1

Then your code can be done this way (as indicated on the library’s own page):

const sha1 = require ('js-sha1');

sha1('teste');
var hash = sha1.create();
hash.update('teste');
hash.hex();