v1.0.0-alpha

This commit is contained in:
AJ ONeal 2018-04-30 17:31:26 -06:00
parent d58a2245be
commit c513a862a4
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browser-csr browser-csr
=========== ===========
Create a CSR (Certificate Signing Request) in the browser that supports SAN altnames.
Used for Let's Encrypt v2 with [greenlock-browser.js](https://git.coolaj86.com/coolaj86/greenlock-browser.js).
Usage
-----
```html
<script src="/js/browser-csr.js"></script>
```
```js
CSR.generate({
/* A WebCrypto-generated keypair */
keypair: {}
/* Subject & SANS altnames */
, domains: [ 'example.com', 'www.example.com' ]
, format: 'rfc7515' // unpadded urlsafe base64
}).then(function (csrweb64) {
console.log(csrweb64);
});
```
Dependencies
------------
[`pkijs@v1.3.33`](https://github.com/PeculiarVentures/PKI.js/tree/41b63af760cacb565dd850fb3466ada4ca163eff)
```
<script src="https://coolaj86.com/assets/media/examples/pkijs.org/v1.3.33/org/pkijs/common.js"></script>
<script src="https://coolaj86.com/assets/media/examples/pkijs.org/v1.3.33/org/pkijs/asn1.js"></script>
<script src="https://coolaj86.com/assets/media/examples/pkijs.org/v1.3.33/org/pkijs/x509_schema.js"></script>
<script src="https://coolaj86.com/assets/media/examples/pkijs.org/v1.3.33/org/pkijs/x509_simpl.js"></script>
```

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csr.js Normal file
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// Adapted from
// https://github.com/PeculiarVentures/PKI.js/blob/1bc0ed3/examples/PKCS%2310%20complex%20example/PKCS10_complex_example.html
// https://stackoverflow.com/questions/48419456/pki-js-v2-and-and-webcrypto-add-subject-alternative-name-with-csr-certificate/49896425#49896425
// https://getwww.me/V1-csrhelp-master.zip
// unibabel.js
// Dependencies
// <script src="https://coolaj86.com/assets/media/examples/pkijs.org/v1.3.33/org/pkijs/common.js"></script>
// <script src="https://coolaj86.com/assets/media/examples/pkijs.org/v1.3.33/org/pkijs/asn1.js"></script>
// <script src="https://coolaj86.com/assets/media/examples/pkijs.org/v1.3.33/org/pkijs/x509_schema.js"></script>
// <script src="https://coolaj86.com/assets/media/examples/pkijs.org/v1.3.33/org/pkijs/x509_simpl.js"></script>
(function (exports) {
'use strict';
var CSR = exports.CSR = {};
function formatPEM(pem_string) {
var string_length = pem_string.length;
var result_string = "";
for (var i = 0, count = 0; i < string_length; i++, count++) {
if (count > 63) {
result_string = result_string + "\r\n";
count = 0;
}
result_string = result_string + pem_string[i];
}
return result_string;
}
function arrayBufferToString(buffer) {
var result_string = "";
var view = new Uint8Array(buffer);
for (var i = 0; i < view.length; i++) {
result_string = result_string + String.fromCharCode(view[i]);
}
return result_string;
}
function createPkcs10Csr(domainKeypair, domains) {
var certf = {};
certf.algorithm = 'ECC';
certf.keysize = 'secp256r1';
certf.hostname = domains.shift();
var context = {};
// #region Get a "crypto" extension
var crypto = org.pkijs.getCrypto();
if (typeof crypto === "undefined") {
context.content = '';
return Promise.reject('No WebCrypto extension found');
}
// #endregion
// #region Prepare P10
context = context || {};
var sequence = Promise.resolve();
var pkcs10_simpl = new org.pkijs.simpl.PKCS10();
var publicKey = domainKeypair.publicKey;
var privateKey = domainKeypair.privateKey;
var hash_algorithm;
hash_algorithm = "sha-256";
var signature_algorithm_name, keylength;
switch (certf.algorithm) {
case "RSA":
signature_algorithm_name = "RSASSA-PKCS1-V1_5";
keylength = parseInt(certf.keysize);
break;
case "ECC":
signature_algorithm_name = "ECDSA";
switch (certf.keysize) {
case 'secp256r1':
keylength = "P-256";
break;
case 'secp384r1':
keylength = "P-384";
break;
case 'secp521r1':
keylength = "P-521";
break;
}
break;
default:
// do nothing
}
// #endregion
// #region Put a static values
pkcs10_simpl.version = 0;
pkcs10_simpl.subject.types_and_values.push(new org.pkijs.simpl.ATTR_TYPE_AND_VALUE({
type: "2.5.4.3",
value: new org.pkijs.asn1.UTF8STRING({
value: certf.hostname
})
}));
pkcs10_simpl.attributes = [];
// #endregion
// #region Exporting public key into "subjectPublicKeyInfo" value of PKCS#10
sequence = sequence.then(function() {
return pkcs10_simpl.subjectPublicKeyInfo.importKey(publicKey);
});
// #endregion
// #region SubjectKeyIdentifier
sequence = sequence.then(function() {
return crypto.digest({
name: "SHA-256"
}, pkcs10_simpl.subjectPublicKeyInfo.subjectPublicKey.value_block.value_hex);
}).then(function(result) {
var extensions = new org.pkijs.simpl.EXTENSIONS({
extensions_array: [
new org.pkijs.simpl.EXTENSION({
extnID: "2.5.29.14",
critical: false,
extnValue: (new org.pkijs.asn1.OCTETSTRING({ value_hex: result })).toBER(false)
})
]
});
var altNames = new org.pkijs.simpl.GENERAL_NAMES({
names: [
new org.pkijs.simpl.GENERAL_NAME({
NameType: 2,
Name: domains.join(', DNS:') //"domain1.com, DNS:domain2.com, DNS:domain3.com"
})
]
});
extensions.extensions_array.push(new org.pkijs.simpl.EXTENSION({
extnID: "2.5.29.17", // subjectAltName
critical: false,
extnValue: altNames.toSchema().toBER(false)
}));
var attribute = new org.pkijs.simpl.ATTRIBUTE({
type: "1.2.840.113549.1.9.14", // pkcs-9-at-extensionRequest
values: [extensions.toSchema()]
});
pkcs10_simpl.attributes.push(attribute);
});
// #endregion
// #region Signing final PKCS#10 request
sequence = sequence.then(function() {
context.privateKey = pkcs10_simpl.sign(privateKey, hash_algorithm);
return pkcs10_simpl.sign(privateKey, hash_algorithm);
});
// #endregion
sequence = sequence.then(function(/*result*/) {
var pkcs10_schema = pkcs10_simpl.toSchema();
var pkcs10_encoded = pkcs10_schema.toBER(false);
var pemder = window.btoa(arrayBufferToString(pkcs10_encoded));
var result_string = "-----BEGIN CERTIFICATE REQUEST-----\r\n";
result_string = result_string + formatPEM(pemder);
result_string = result_string + "\r\n-----END CERTIFICATE REQUEST-----\r\n";
context.content = result_string;
console.log('CSR as PEM:');
console.log(context.content);
return pemder.replace(/\+/g, '-').replace(/\//g, '_').replace(/=+$/g, '');
});
return sequence;
}
CSR.formatPem = formatPEM;
CSR.generate = function (options) {
return createPkcs10Csr(options.keypair, options.domains);
};
}(window));

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package.json Normal file
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{
"name": "browser-csr",
"version": "1.0.0-alpha",
"description": "Generate a CSR in your browser (i.e. for Let's Encrypt v2) with WebCrypto and PKIjs. Supports SAN altnames.",
"main": "csr.js",
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1"
},
"repository": {
"type": "git",
"url": "ssh://gitea@git.coolaj86.com:22042/coolaj86/browser-csr.js.git"
},
"keywords": [
"pki",
"pkijs",
"asn1",
"asn1js",
"Let's Encrypt",
"Let's Encrypt v2",
"letsencrypt",
"greenlock",
"browser",
"csr",
"certificate",
"signing",
"request",
"ACME"
],
"author": "AJ ONeal <coolaj86@gmail.com> (https://coolaj86.com/)",
"license": "(MIT OR Apache-2.0)"
}