How to Encrypt Data in Javascript with RSA public key?
10,881
you should add -----BEGIN PUBLIC KEY-----
and -----END PUBLIC KEY-----
like this
-----BEGIN PUBLIC KEY-----
MIGfMA0GCSqGSIb3DQE...
-----END PUBLIC KEY-----`
Author by
anwesh mohapatra
Updated on June 18, 2022Comments
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anwesh mohapatra almost 2 years
Server generates RSA public and private keys and store them in the session. Over a server call the client html page recieves the public key. Now I want to encrypt data using it. I have tried using jsencrypt but it doesn't recognize the public key my server generates. Gives false when I call encrypt after setting the public key. I think the key is 2048 bits. Not sure about the encoding though. How to encrypt data using this key? Any help is appreciated.
Sample public key generated by server: 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
Edit: As suggested by many, I tried using crypto:
let crypto; try { crypto = require('crypto'); } catch (err) { console.log('crypto support is disabled!'); } var encryptStringWithRsaPublicKey = function(toEncrypt, publicKey) { var buffer = Buffer.from(toEncrypt,'utf8'); var encrypted = crypto.publicEncrypt(publicKey, buffer); return encrypted.toString("base64"); }; console.log(encryptStringWithRsaPublicKey('MyText','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'));
It is throwing the below error:
Uncaught TypeError: Cannot read property '2' of null at push../node_modules/parse-asn1/fixProc.js.module.exports (fixProc.js:19) at parseKeys (index.js:27) at Object.publicEncrypt (publicEncrypt.js:30) at encryptStringWithRsaPublicKey (App.js:20) at Module.<anonymous> (App.js:23) at Module../src/App.js (App.js:727) at __webpack_require__ (bootstrap:781) at fn (bootstrap:149) at Module../src/index.js (index.css?f3f6:45) at __webpack_require__ (bootstrap:781) at fn (bootstrap:149) at Object.0 (test.css?2a93:45) at __webpack_require__ (bootstrap:781) at checkDeferredModules (bootstrap:45) at Array.webpackJsonpCallback [as push] (bootstrap:32) at main.chunk.js:1