1to8
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Patrick Roumanoff
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81
1to8.html
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81
1to8.html
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<!doctype html>
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<html>
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<head>
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<title>js-keygen: convert pkcs1 to pkcs8</title>
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<script>module = {};</script>
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<script src="pkcs1To8.js"></script>
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<link rel="stylesheet" href="js-keygen.css">
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<link rel="icon" type="image/png" href="key.png">
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</head>
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<body>
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<div id="content">
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<h1>Convert PKCS1 private key to PKCS8 private key</h1>
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<p>From the command line you can run
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<br>
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<code>openssl pkcs8 -topk8 -inform PEM -outform PEM -in private.pkcs1 -out private.pkcs8 -nocrypt</code>
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<br>We can do the same in javascript</p>
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<br> No data is being sent to the server, everything happens within the context of this web page.
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<br>
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<hr>
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<div>
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<label for="key">PKCS1 private Key PEM:</label>
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<br>
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<textarea id="key" style="height: 300px;" spellcheck="false">-----BEGIN PRIVATE KEY-----
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MIIEvAIBADANBgkqhkiG9w0BAQEFAASCBKYwggSiAgEAAoIBAQCku91CnYnU+88p
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sDWthuLgMLZd1cWOMF8xV7KUNR/EqssNWObwdD/mrX6Z8t9MPl0T6jL8+EMHRcQn
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pIR8bgUf7WT7Kl9INe/TpoIVX1bfyenQIqJbFE4lPs3E0VJP45wHFFRK85ls08zI
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wuWvb0XnbVUxF0ryhsJj24VR3cjHQtkDc22Vu8yUzWS3VtBSUdfzT1EwVXm1AGAz
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WhjO+W/7fvWYvR9uO7O+po0g4kbloL9lO1v+pMPVZvcv6VQqLbcgNc6fzAlfwis9
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a/uKgRZhAgMBAAECggEADtNBZF9dKifHSw8qpYVAIcEAiI1WjCdaScyEq8XkKATe
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wwul5Xve8wKBgGl956B9bsK5J9VCaRpu2hF/542VgiwINweGYaQmm4fLWJFtNtmr
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behDQHQKV1taiD+EEaARMpiNE9/w3QP3HlQ6iD/SMkzydVzh1ol6jE9LjlD8zsWK
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azQHqVdJ3rtwLnajOshvMrRiErVMxRalGDPwhQhunYJ8Ua5AQfkLSrN1AoGATKyc
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5T5P2bJ6ZH2bjlymjZF4QdRPHg2eVcjpnDBUh505AEgKJID6fU0zH/Q20k3iXQy1
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/7YROPrAfsCwALhQvA/K1rvqwO6teGou/+Pnr/QV93H5K57bjhp9WkNwA15xPuUU
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qB7AaaOKY5n45sJKxGSliJdL2o0FealVXra3IpECgYA0YYrmCNXb2LISpJe3NLJI
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4UkMLsRwR4rnumsmbQl7u3NAjZtvsUWv+b8fayEbQii49RwfslJclrSAG/y0l/sA
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l+a6EbtPiu6HeP0nLYksP/yxSd1RfXWr2KEKQXv0DSRguQAmr5QyR6CMCJXvM/ul
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zB/5uOOZD9IzgautQqwIcQ==
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-----END PRIVATE KEY-----
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</textarea>
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</div>
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<button id="generate">Convert</button>
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<div>
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<label for="pem">PKCS8 private key PEM:</label>
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<br>
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<textarea id="pem" disabled style="height: 350px;" spellcheck="false"></textarea>
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</div>
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<br> To validate this pkcs8 record you can convert it baco pkcs1 through openssl:
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<code>openssl pkcs8 -inform PEM -outform PEM -in private.pkcs8 -out private.pkcs1 -nocrypt</code>
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<hr> Made with
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<span style="color:magenta;">♥</span> by
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<a href="http://blog.roumanoff.com">Patrick Roumanoff</a>
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<a href="https://github.com/PatrickRoumanoff/js-keygen">
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<img style="position: absolute; top: 0; right: 0; border: 0;" src="https://camo.githubusercontent.com/365986a132ccd6a44c23a9169022c0b5c890c387/68747470733a2f2f73332e616d617a6f6e6177732e636f6d2f6769746875622f726962626f6e732f666f726b6d655f72696768745f7265645f6161303030302e706e67"
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alt="Fork me on GitHub" data-canonical-src="https://s3.amazonaws.com/github/ribbons/forkme_right_red_aa0000.png">
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</a>
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</div>
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<script>
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document.addEventListener("DOMContentLoaded", () => {
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document.querySelector("#generate").addEventListener("click", () => {
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document.querySelector("#pem").value = pkcs1To8(document.querySelector("#key").value)
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});
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});
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</script>
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</body>
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</html>
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84
pkcs1To8.js
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84
pkcs1To8.js
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/* eslint no-bitwise: 0 */
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function wrap(text, len) {
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const length = len || 72;
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let result = "";
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for (let i = 0; i < text.length; i += length) {
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result += text.slice(i, i + length);
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result += "\n";
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}
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return result;
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}
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function pemPrivateKey(key) {
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return `-----BEGIN PRIVATE KEY-----\n${wrap(key, 64)}-----END PRIVATE KEY-----`;
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}
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function stripPemFormatting(str) {
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return str
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.replace(/^-----BEGIN (?:RSA )?(?:PRIVATE|PUBLIC) KEY-----$/m, "")
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.replace(/^-----END (?:RSA )?(?:PRIVATE|PUBLIC) KEY-----$/m, "")
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.replace(/[\n\r]/g, "");
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}
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function arrayToPem(a) {
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return window.btoa(a.map(c => String.fromCharCode(c)).join(""));
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}
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function stringToArray(s) {
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return s.split("").map(c => c.charCodeAt());
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}
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function pemToArray(pem) {
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return stringToArray(window.atob(pem));
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}
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const prefix = [
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0x30,
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0x82,
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0x04,
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0xbc,
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0x02,
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0x01,
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0x00,
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0x30,
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0x0d,
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0x06,
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0x09,
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0x2a,
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0x86,
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0x48,
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0x86,
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0xf7,
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0x0d,
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0x01,
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0x01,
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0x01,
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0x05,
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0x00,
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0x04,
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0x82,
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0x04,
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0xa6,
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];
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function pkcs1To8(privateKeyPkcs1Pem) {
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const pem = stripPemFormatting(privateKeyPkcs1Pem);
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const privateKeyPkcs1Array = pemToArray(pem);
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const prefixPkcs8 = prefix.concat(privateKeyPkcs1Array);
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const privateKeyPkcs8Pem = arrayToPem(prefixPkcs8);
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const pkcs8Pem = pemPrivateKey(privateKeyPkcs8Pem);
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return pkcs8Pem;
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}
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// crypto.subtle.importKey(
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// "spki",
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// keyTextBuffer,
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// {
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// name: "RSASSA-PKCS1-v1_5",
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// hash: { name: "SHA-256" },
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// },
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// true,
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// ["verify"]
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// );
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module.exports = { pkcs1To8 };
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