-
-
Save mozkeeler/29754494dcdb3b169483595283f29923 to your computer and use it in GitHub Desktop.
AIA analysis
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
var atob = require("atob"); | |
var fs = require("fs"); | |
var lintx509 = require("./lintx509.js"); | |
if (process.argv.length < 3) { | |
console.error(`usage: ${process.argv[0]} ${process.argv[1]} <filename>`); | |
process.exit(1); | |
} | |
function findCAIssuersAIA(cert) { | |
if (!cert.tbsCertificate.extensions) { | |
return false; | |
} | |
for (let extension of cert.tbsCertificate.extensions) { | |
if (extension.extnID.toString() == "id-pe-authorityInfoAccess") { | |
for (let description of extension.extnValue.accessDescriptions) { | |
if (description.accessMethod.toString() == "id-ad-caIssuers") { | |
return true; | |
} | |
} | |
} | |
} | |
return false; | |
} | |
function processCert(cert, count) { | |
let result = { hasCAIssuersAIA: findCAIssuersAIA(cert), | |
volume: parseInt(count, 10) }; | |
return result; | |
} | |
function analyzeResults(results) { | |
let numCAIssuersAIAs = 0; | |
let weightedNumCAIssuersAIAs = 0; | |
let totalWeight = 0; | |
results.forEach((result) => { | |
totalWeight += result.volume; | |
if (result.hasCAIssuersAIA) { | |
numCAIssuersAIAs++; | |
weightedNumCAIssuersAIAs += result.volume; | |
} | |
}); | |
let unweightedPercentage = (100 * numCAIssuersAIAs / results.length).toFixed(2); | |
let weightedPercentage = (100 * weightedNumCAIssuersAIAs / totalWeight).toFixed(2); | |
console.log(`${numCAIssuersAIAs} out of ${results.length} have CA issuer AIA`); | |
console.log(`unweighted: ${unweightedPercentage}%`); | |
console.log(`weighted: ${weightedPercentage}%`); | |
} | |
var input = process.argv[2]; | |
fs.readFile(input, "utf-8", (err, data) => { | |
if (err) { | |
console.error(err); | |
return; | |
} | |
let results = []; | |
let errorCount = 0; | |
let lines = data.split("\n"); | |
for (let line of lines) { | |
if (line.length == 0) { | |
continue; | |
} | |
let [b64, count] = line.split(" "); | |
try { | |
let bin = atob(b64); | |
let bytes = []; | |
for (let i = 0; i < bin.length; i++) { | |
bytes.push(bin.charCodeAt(i)); | |
} | |
let der = new lintx509.DER(bytes); | |
let cert = new lintx509.Certificate(der); | |
cert.parse(); | |
results.push(processCert(cert, count)); | |
} catch (e) { | |
console.error(e); | |
errorCount++; | |
} | |
} | |
console.log(`${errorCount} errors`); | |
analyzeResults(results); | |
}); |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
0 errors | |
1656 out of 83583 have CA issuer AIA | |
unweighted: 1.98% | |
weighted: 5.88% |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment