Created
November 12, 2020 10:35
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JSEncypt to nodejs crypto and back
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const JSEncrypt = require('node-jsencrypt'); | |
const crypto = require('crypto'); | |
const text = ' Some text ÜÄ'; | |
const privateKey = ` | |
-----BEGIN RSA PRIVATE KEY----- | |
MIICXQIBAAKBgQDlOJu6TyygqxfWT7eLtGDwajtNFOb9I5XRb6khyfD1Yt3YiCgQ | |
WMNW649887VGJiGr/L5i2osbl8C9+WJTeucF+S76xFxdU6jE0NQ+Z+zEdhUTooNR | |
aY5nZiu5PgDB0ED/ZKBUSLKL7eibMxZtMlUDHjm4gwQco1KRMDSmXSMkDwIDAQAB | |
AoGAfY9LpnuWK5Bs50UVep5c93SJdUi82u7yMx4iHFMc/Z2hfenfYEzu+57fI4fv | |
xTQ//5DbzRR/XKb8ulNv6+CHyPF31xk7YOBfkGI8qjLoq06V+FyBfDSwL8KbLyeH | |
m7KUZnLNQbk8yGLzB3iYKkRHlmUanQGaNMIJziWOkN+N9dECQQD0ONYRNZeuM8zd | |
8XJTSdcIX4a3gy3GGCJxOzv16XHxD03GW6UNLmfPwenKu+cdrQeaqEixrCejXdAF | |
z/7+BSMpAkEA8EaSOeP5Xr3ZrbiKzi6TGMwHMvC7HdJxaBJbVRfApFrE0/mPwmP5 | |
rN7QwjrMY+0+AbXcm8mRQyQ1+IGEembsdwJBAN6az8Rv7QnD/YBvi52POIlRSSIM | |
V7SwWvSK4WSMnGb1ZBbhgdg57DXaspcwHsFV7hByQ5BvMtIduHcT14ECfcECQATe | |
aTgjFnqE/lQ22Rk0eGaYO80cc643BXVGafNfd9fcvwBMnk0iGX0XRsOozVt5Azil | |
psLBYuApa66NcVHJpCECQQDTjI2AQhFc1yRnCU/YgDnSpJVm1nASoRUnU8Jfm3Oz | |
uku7JUXcVpt08DFSceCEX9unCuMcT72rAQlLpdZir876 | |
-----END RSA PRIVATE KEY----- | |
`.trim(); | |
const publicKey = ` | |
-----BEGIN PUBLIC KEY----- | |
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDlOJu6TyygqxfWT7eLtGDwajtN | |
FOb9I5XRb6khyfD1Yt3YiCgQWMNW649887VGJiGr/L5i2osbl8C9+WJTeucF+S76 | |
xFxdU6jE0NQ+Z+zEdhUTooNRaY5nZiu5PgDB0ED/ZKBUSLKL7eibMxZtMlUDHjm4 | |
gwQco1KRMDSmXSMkDwIDAQAB | |
-----END PUBLIC KEY----- | |
`.trim(); | |
const jsEncryptEncrypt = (message) => { | |
const crypt1 = new JSEncrypt(); | |
crypt1.setKey(publicKey); | |
const encrypted = crypt1.encrypt(message); | |
return encrypted; | |
}; | |
const jsEncryptDecrypt = (message) => { | |
const crypt2 = new JSEncrypt(); | |
crypt2.setKey(privateKey); | |
const decrypted = crypt2.decrypt(message); | |
return decrypted; | |
}; | |
const privateKeyObj = crypto.createPrivateKey(privateKey); | |
const publicKeyObj = crypto.createPublicKey(publicKey); | |
const pad = (buf, length) => { | |
const missingLength = length - buf.length; | |
const randomNumber = 0xff; | |
const ps = Buffer.allocUnsafe(missingLength - 3).fill(randomNumber); | |
return Buffer.concat([Buffer.from([0x00, 0x02]), ps, Buffer.from([0x00]), buf]); | |
}; | |
const unpad = (buf) => { | |
const prefixLength = 2; | |
const paddingEndIndex = buf.indexOf(0, prefixLength - 1); | |
return buf.slice(paddingEndIndex + 1); | |
}; | |
const nodejsEncrypt = (message) => { | |
const paddedMessage = pad(Buffer.from(message, 'utf-8'), 128); | |
const result = crypto.publicEncrypt( | |
{ key: publicKeyObj, padding: crypto.constants.RSA_NO_PADDING }, | |
paddedMessage, | |
); | |
return result.toString('base64'); | |
}; | |
const nodejsDecrypt = (message) => { | |
const result = crypto.privateDecrypt( | |
{ key: privateKeyObj, padding: crypto.constants.RSA_NO_PADDING }, | |
Buffer.from(message, 'base64'), | |
); | |
return unpad(result).toString('utf-8'); | |
}; | |
const TEST_CASES = [ | |
[jsEncryptEncrypt, jsEncryptDecrypt, 'jsencrypt-jsencrypt'], | |
[nodejsEncrypt, jsEncryptDecrypt, 'nodejs-jsencrypt'], | |
[jsEncryptEncrypt, nodejsDecrypt, 'jsencrypt-nodejs'], | |
[nodejsEncrypt, nodejsDecrypt, 'nodejs-nodejs'], | |
]; | |
for (const [encrypt, decrypt, name] of TEST_CASES) { | |
console.log(); | |
console.log('<<<<<', name, '>>>>>'); | |
const encrypted = encrypt(text); | |
console.log('encrypted', encrypted); | |
const decrypted = decrypt(encrypted); | |
console.log('decrypted', decrypted); | |
if (text !== decrypted) { | |
console.log('FAIL'); | |
} else { | |
console.log('PASS'); | |
} | |
} |
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