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Node.JS - CRYPTO How to sign a file
//how to execute: node sign.js <path file> <path private key>
//output: signature of file
var crypto = require('crypto');
var fs = require('fs');
var args = process.argv.slice(2);
var fileName = args[0];
var keyPath = args[1];
//openssl genrsa -out key.pem 1024
var privatePem = fs.readFileSync(keyPath);
var key = privatePem.toString();
var sign = crypto.createSign('RSA-SHA256');
var buffer = fs.readFileSync(fileName);
sign.update(buffer);
var sig = sign.sign(key, 'hex');
console.log(sig);
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