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Generate sha-256 hash using crypto in browsers
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const text = 'An obscure body in the S-K System, your majesty. The inhabitants refer to it as the planet Earth.'; | |
async function digestMessage(message) { | |
const msgUint8 = new TextEncoder().encode(message); // encode as (utf-8) Uint8Array | |
const hashBuffer = await crypto.subtle.digest('SHA-256', msgUint8); // hash the message | |
const hashArray = Array.from(new Uint8Array(hashBuffer)); // convert buffer to byte array | |
const hashHex = hashArray.map(b => b.toString(16).padStart(2, '0')).join(''); // convert bytes to hex string | |
return hashHex; | |
} | |
const digestHex = await digestMessage(text); | |
// first seven characters of sha-256 are considered unique to certain extent | |
console.log(digestHex.slice(0,7)); | |
// nore on mdn https://developer.mozilla.org/en-US/docs/Web/API/SubtleCrypto/digest |
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