mirror of
https://github.com/mozilla/gecko-dev.git
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586 lines
20 KiB
JavaScript
586 lines
20 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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// How to run this file:
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// 1. [obtain firefox source code]
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// 2. [build/obtain firefox binaries]
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// 3. run `[path to]/run-mozilla.sh [path to]/xpcshell \
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// [path to]/genHPKPStaticpins.js \
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// [absolute path to]/PreloadedHPKPins.json \
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// [absolute path to]/default-ee.der \
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// [absolute path to]/StaticHPKPins.h
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if (arguments.length != 3) {
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throw "Usage: genHPKPStaticPins.js " +
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"<absolute path to PreloadedHPKPins.json> " +
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"<absolute path to default-ee.der> " +
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"<absolute path to StaticHPKPins.h>";
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}
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const { 'classes': Cc, 'interfaces': Ci, 'utils': Cu, 'results': Cr } = Components;
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let { NetUtil } = Cu.import("resource://gre/modules/NetUtil.jsm", {});
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let { FileUtils } = Cu.import("resource://gre/modules/FileUtils.jsm", {});
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let { Services } = Cu.import("resource://gre/modules/Services.jsm", {});
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let gCertDB = Cc["@mozilla.org/security/x509certdb;1"]
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.getService(Ci.nsIX509CertDB);
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const BUILT_IN_NICK_PREFIX = "Builtin Object Token:";
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const SHA1_PREFIX = "sha1/";
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const SHA256_PREFIX = "sha256/";
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const GOOGLE_PIN_PREFIX = "GOOGLE_PIN_";
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// Pins expire in 14 weeks (6 weeks on Beta + 8 weeks on stable)
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const PINNING_MINIMUM_REQUIRED_MAX_AGE = 60 * 60 * 24 * 7 * 14;
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const FILE_HEADER = "/* This Source Code Form is subject to the terms of the Mozilla Public\n" +
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" * License, v. 2.0. If a copy of the MPL was not distributed with this\n" +
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" * file, You can obtain one at http://mozilla.org/MPL/2.0/. */\n" +
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"\n" +
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"/*****************************************************************************/\n" +
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"/* This is an automatically generated file. If you're not */\n" +
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"/* PublicKeyPinningService.cpp, you shouldn't be #including it. */\n" +
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"/*****************************************************************************/\n" +
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"#include <stdint.h>" +
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"\n";
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const DOMAINHEADER = "/* Domainlist */\n" +
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"struct TransportSecurityPreload {\n" +
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" const char* mHost;\n" +
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" const bool mIncludeSubdomains;\n" +
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" const bool mTestMode;\n" +
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" const bool mIsMoz;\n" +
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" const int32_t mId;\n" +
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" const StaticPinset *pinset;\n" +
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"};\n\n";
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const PINSETDEF = "/* Pinsets are each an ordered list by the actual value of the fingerprint */\n" +
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"struct StaticFingerprints {\n" +
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" const size_t size;\n" +
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" const char* const* data;\n" +
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"};\n\n" +
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"struct StaticPinset {\n" +
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" const StaticFingerprints* sha1;\n" +
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" const StaticFingerprints* sha256;\n" +
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"};\n\n";
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// Command-line arguments
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var gStaticPins = parseJson(arguments[0]);
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var gTestCertFile = arguments[1];
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// Open the output file.
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let file = Cc["@mozilla.org/file/local;1"].createInstance(Ci.nsILocalFile);
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file.initWithPath(arguments[2]);
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let gFileOutputStream = FileUtils.openSafeFileOutputStream(file);
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function writeString(string) {
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gFileOutputStream.write(string, string.length);
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}
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function readFileToString(filename) {
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let file = Cc["@mozilla.org/file/local;1"].createInstance(Ci.nsILocalFile);
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file.initWithPath(filename);
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let stream = Cc["@mozilla.org/network/file-input-stream;1"]
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.createInstance(Ci.nsIFileInputStream);
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stream.init(file, -1, 0, 0);
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let buf = NetUtil.readInputStreamToString(stream, stream.available());
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return buf;
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}
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function stripComments(buf) {
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var lines = buf.split("\n");
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let entryRegex = /^\s*\/\//;
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let data = "";
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for (let i = 0; i < lines.length; ++i) {
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let match = entryRegex.exec(lines[i]);
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if (!match) {
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data = data + lines[i];
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}
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}
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return data;
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}
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function isBuiltinToken(tokenName) {
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return tokenName == "Builtin Object Token";
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}
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function isCertBuiltIn(cert) {
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let tokenNames = cert.getAllTokenNames({});
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if (!tokenNames) {
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return false;
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}
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if (tokenNames.some(isBuiltinToken)) {
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return true;
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}
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return false;
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}
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function download(filename) {
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var req = Cc["@mozilla.org/xmlextras/xmlhttprequest;1"]
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.createInstance(Ci.nsIXMLHttpRequest);
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req.open("GET", filename, false); // doing the request synchronously
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try {
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req.send();
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}
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catch (e) {
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throw "ERROR: problem downloading '" + filename + "': " + e;
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}
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if (req.status != 200) {
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throw("ERROR: problem downloading '" + filename + "': status " +
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req.status);
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}
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var resultDecoded;
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try {
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resultDecoded = atob(req.responseText);
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}
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catch (e) {
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throw "ERROR: could not decode data as base64 from '" + filename + "': " + e;
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}
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return resultDecoded;
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}
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function downloadAsJson(filename) {
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// we have to filter out '//' comments
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var result = download(filename).replace(/\/\/[^\n]*\n/g, "");
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var data = null;
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try {
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data = JSON.parse(result);
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}
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catch (e) {
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throw "ERROR: could not parse data from '" + filename + "': " + e;
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}
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return data;
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}
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// Returns a Subject Public Key Digest from the given pem, if it exists.
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function getSKDFromPem(pem) {
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let cert = gCertDB.constructX509FromBase64(pem, pem.length);
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return cert.sha256SubjectPublicKeyInfoDigest;
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}
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// Downloads the static certs file and tries to map Google Chrome nicknames
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// to Mozilla nicknames, as well as storing any hashes for pins for which we
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// don't have root PEMs. Each entry consists of a line containing the name of
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// the pin followed either by a hash in the format "sha1/" + base64(hash), or
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// a PEM encoded certificate. For certificates that we have in our database,
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// return a map of Google's nickname to ours. For ones that aren't return a
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// map of Google's nickname to sha1 values. This code is modeled after agl's
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// https://github.com/agl/transport-security-state-generate, which doesn't
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// live in the Chromium repo because go is not an official language in
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// Chromium.
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// For all of the entries in this file:
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// - If the entry has a hash format, find the Mozilla pin name (cert nickname)
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// and stick the hash into certSKDToName
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// - If the entry has a PEM format, parse the PEM, find the Mozilla pin name
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// and stick the hash in certSKDToName
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// We MUST be able to find a corresponding cert nickname for the Chrome names,
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// otherwise we skip all pinsets referring to that Chrome name.
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function downloadAndParseChromeCerts(filename, certSKDToName) {
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// Prefixes that we care about.
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const BEGIN_CERT = "-----BEGIN CERTIFICATE-----";
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const END_CERT = "-----END CERTIFICATE-----";
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// Parsing states.
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const PRE_NAME = 0;
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const POST_NAME = 1;
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const IN_CERT = 2;
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let state = PRE_NAME;
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let lines = download(filename).split("\n");
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let name = "";
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let pemCert = "";
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let hash = "";
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let chromeNameToHash = {};
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let chromeNameToMozName = {}
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for (let i = 0; i < lines.length; ++i) {
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let line = lines[i];
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// Skip comments and newlines.
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if (line.length == 0 || line[0] == '#') {
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continue;
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}
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switch(state) {
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case PRE_NAME:
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chromeName = line;
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state = POST_NAME;
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break;
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case POST_NAME:
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if (line.startsWith(SHA1_PREFIX) ||
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line.startsWith(SHA256_PREFIX)) {
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if (line.startsWith(SHA1_PREFIX)) {
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hash = line.substring(SHA1_PREFIX.length);
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} else if (line.startsWith(SHA256_PREFIX)) {
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hash = line.substring(SHA256_PREFIX);
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}
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// Store the entire prefixed hash, so we can disambiguate sha1 from
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// sha256 later.
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chromeNameToHash[chromeName] = line;
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certNameToSKD[chromeName] = hash;
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certSKDToName[hash] = chromeName;
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state = PRE_NAME;
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} else if (line.startsWith(BEGIN_CERT)) {
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state = IN_CERT;
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} else {
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throw "ERROR: couldn't parse Chrome certificate file " + line;
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}
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break;
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case IN_CERT:
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if (line.startsWith(END_CERT)) {
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state = PRE_NAME;
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hash = getSKDFromPem(pemCert);
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pemCert = "";
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if (hash in certSKDToName) {
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mozName = certSKDToName[hash];
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} else {
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// Not one of our built-in certs. Prefix the name with
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// GOOGLE_PIN_.
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mozName = GOOGLE_PIN_PREFIX + chromeName;
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dump("Can't find hash in builtin certs for Chrome nickname " +
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chromeName + ", inserting " + mozName + "\n");
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certSKDToName[hash] = mozName;
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certNameToSKD[mozName] = hash;
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}
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chromeNameToMozName[chromeName] = mozName;
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} else {
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pemCert += line;
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}
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break;
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default:
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throw "ERROR: couldn't parse Chrome certificate file " + line;
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}
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}
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return [ chromeNameToHash, chromeNameToMozName ];
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}
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// We can only import pinsets from chrome if for every name in the pinset:
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// - We have a hash from Chrome's static certificate file
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// - We have a builtin cert
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// If the pinset meets these requirements, we store a map array of pinset
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// objects:
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// {
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// pinset_name : {
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// // Array of names with entries in certNameToSKD
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// sha1_hashes: [],
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// sha256_hashes: []
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// }
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// }
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// and an array of imported pinset entries:
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// { name: string, include_subdomains: boolean, test_mode: boolean,
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// pins: pinset_name }
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function downloadAndParseChromePins(filename,
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chromeNameToHash,
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chromeNameToMozName,
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certNameToSKD,
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certSKDToName) {
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let chromePreloads = downloadAsJson(filename);
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let chromePins = chromePreloads.pinsets;
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let chromeImportedPinsets = {};
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let chromeImportedEntries = [];
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chromePins.forEach(function(pin) {
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let valid = true;
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let pinset = { name: pin.name, sha1_hashes: [], sha256_hashes: [] };
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// Translate the Chrome pinset format to ours
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pin.static_spki_hashes.forEach(function(name) {
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if (name in chromeNameToHash) {
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let hash = chromeNameToHash[name];
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if (hash.startsWith(SHA1_PREFIX)) {
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hash = hash.substring(SHA1_PREFIX.length);
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pinset.sha1_hashes.push(certSKDToName[hash]);
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} else if (hash.startsWith(SHA256_PREFIX)) {
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hash = hash.substring(SHA256_PREFIX.length);
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pinset.sha256_hashes.push(certSKDToName[hash]);
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} else {
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throw("Unsupported hash type: " + chromeNameToHash[name]);
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}
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// We should have already added hashes for all of these when we
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// imported the certificate file.
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if (!certNameToSKD[name]) {
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throw("No hash for name: " + name);
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}
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} else if (name in chromeNameToMozName) {
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pinset.sha256_hashes.push(chromeNameToMozName[name]);
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} else {
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dump("Skipping Chrome pinset " + pinset.name + ", couldn't find " +
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"builtin " + name + " from cert file\n");
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valid = false;
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}
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});
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if (valid) {
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chromeImportedPinsets[pinset.name] = pinset;
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}
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});
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// Grab the domain entry lists. Chrome's entry format is similar to
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// ours, except theirs includes a HSTS mode.
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const cData = gStaticPins.chromium_data;
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let entries = chromePreloads.entries;
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entries.forEach(function(entry) {
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let pinsetName = cData.substitute_pinsets[entry.pins];
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if (!pinsetName) {
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pinsetName = entry.pins;
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}
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let isProductionDomain =
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(cData.production_domains.indexOf(entry.name) != -1);
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let isProductionPinset =
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(cData.production_pinsets.indexOf(pinsetName) != -1);
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let excludeDomain =
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(cData.exclude_domains.indexOf(entry.name) != -1);
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let isTestMode = !isProductionPinset && !isProductionDomain;
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if (entry.pins && !excludeDomain && chromeImportedPinsets[entry.pins]) {
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chromeImportedEntries.push({
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name: entry.name,
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include_subdomains: entry.include_subdomains,
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test_mode: isTestMode,
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is_moz: false,
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pins: pinsetName });
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}
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});
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return [ chromeImportedPinsets, chromeImportedEntries ];
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}
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// Returns a pair of maps [certNameToSKD, certSKDToName] between cert
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// nicknames and digests of the SPKInfo for the mozilla trust store
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function loadNSSCertinfo(derTestFile, extraCertificates) {
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let allCerts = gCertDB.getCerts();
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let enumerator = allCerts.getEnumerator();
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let certNameToSKD = {};
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let certSKDToName = {};
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while (enumerator.hasMoreElements()) {
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let cert = enumerator.getNext().QueryInterface(Ci.nsIX509Cert);
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if (!isCertBuiltIn(cert)) {
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continue;
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}
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let name = cert.nickname.substr(BUILT_IN_NICK_PREFIX.length);
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let SKD = cert.sha256SubjectPublicKeyInfoDigest;
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certNameToSKD[name] = SKD;
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certSKDToName[SKD] = name;
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}
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for (let cert of extraCertificates) {
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let name = cert.commonName;
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let SKD = cert.sha256SubjectPublicKeyInfoDigest;
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certNameToSKD[name] = SKD;
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certSKDToName[SKD] = name;
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}
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{
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// A certificate for *.example.com.
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let der = readFileToString(derTestFile);
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let testCert = gCertDB.constructX509(der, der.length);
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// We can't include this cert in the previous loop, because it skips
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// non-builtin certs and the nickname is not built-in to the cert.
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let name = "End Entity Test Cert";
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let SKD = testCert.sha256SubjectPublicKeyInfoDigest;
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certNameToSKD[name] = SKD;
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certSKDToName[SKD] = name;
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}
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return [certNameToSKD, certSKDToName];
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}
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function parseJson(filename) {
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let json = stripComments(readFileToString(filename));
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return JSON.parse(json);
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}
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function nameToAlias(certName) {
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// change the name to a string valid as a c identifier
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// remove non-ascii characters
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certName = certName.replace( /[^[:ascii:]]/g, "_");
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// replace non word characters
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certName = certName.replace(/[^A-Za-z0-9]/g ,"_");
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return "k" + certName + "Fingerprint";
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}
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function compareByName (a, b) {
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return a.name.localeCompare(b.name);
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}
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function genExpirationTime() {
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let now = new Date();
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let nowMillis = now.getTime();
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let expirationMillis = nowMillis + (PINNING_MINIMUM_REQUIRED_MAX_AGE * 1000);
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let expirationMicros = expirationMillis * 1000;
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return "static const PRTime kPreloadPKPinsExpirationTime = INT64_C(" +
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expirationMicros +");\n";
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}
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function writeFullPinset(certNameToSKD, certSKDToName, pinset) {
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// We aren't guaranteed to have sha1 hashes in our own imported pins.
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let prefix = "kPinset_" + pinset.name;
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let sha1Name = "nullptr";
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let sha256Name = "nullptr";
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if (pinset.sha1_hashes && pinset.sha1_hashes.length > 0) {
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writeFingerprints(certNameToSKD, certSKDToName, pinset.name,
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pinset.sha1_hashes, "sha1");
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sha1Name = "&" + prefix + "_sha1";
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}
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if (pinset.sha256_hashes && pinset.sha256_hashes.length > 0) {
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writeFingerprints(certNameToSKD, certSKDToName, pinset.name,
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pinset.sha256_hashes, "sha256");
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sha256Name = "&" + prefix + "_sha256";
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}
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writeString("static const StaticPinset " + prefix + " = {\n" +
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" " + sha1Name + ",\n " + sha256Name + "\n};\n\n");
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}
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function writeFingerprints(certNameToSKD, certSKDToName, name, hashes, type) {
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let varPrefix = "kPinset_" + name + "_" + type;
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writeString("static const char* " + varPrefix + "_Data[] = {\n");
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let SKDList = [];
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for (let certName of hashes) {
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if (!(certName in certNameToSKD)) {
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throw "Can't find " + certName + " in certNameToSKD";
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}
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SKDList.push(certNameToSKD[certName]);
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}
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for (let skd of SKDList.sort()) {
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writeString(" " + nameToAlias(certSKDToName[skd]) + ",\n");
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}
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if (hashes.length == 0) {
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// ANSI C requires that an initialiser list be non-empty.
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writeString(" 0\n");
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}
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writeString("};\n");
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writeString("static const StaticFingerprints " + varPrefix + " = {\n " +
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"sizeof(" + varPrefix + "_Data) / sizeof(const char*),\n " + varPrefix +
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"_Data\n};\n\n");
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}
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function writeEntry(entry) {
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let printVal = " { \"" + entry.name + "\",\ ";
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if (entry.include_subdomains) {
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printVal += "true, ";
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} else {
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printVal += "false, ";
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}
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// Default to test mode if not specified.
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let testMode = true;
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if (entry.hasOwnProperty("test_mode")) {
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testMode = entry.test_mode;
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}
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if (testMode) {
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printVal += "true, ";
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} else {
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printVal += "false, ";
|
|
}
|
|
if (entry.is_moz || (entry.pins.indexOf("mozilla") != -1 &&
|
|
entry.pins != "mozilla_test")) {
|
|
printVal += "true, ";
|
|
} else {
|
|
printVal += "false, ";
|
|
}
|
|
if (entry.id >= 256) {
|
|
throw("Not enough buckets in histogram");
|
|
}
|
|
if (entry.id >= 0) {
|
|
printVal += entry.id + ", ";
|
|
} else {
|
|
printVal += "-1, ";
|
|
}
|
|
printVal += "&kPinset_" + entry.pins;
|
|
printVal += " },\n";
|
|
writeString(printVal);
|
|
}
|
|
|
|
function writeDomainList(chromeImportedEntries) {
|
|
writeString("/* Sort hostnames for binary search. */\n");
|
|
writeString("static const TransportSecurityPreload " +
|
|
"kPublicKeyPinningPreloadList[] = {\n");
|
|
let count = 0;
|
|
let sortedEntries = gStaticPins.entries;
|
|
sortedEntries.push.apply(sortedEntries, chromeImportedEntries);
|
|
for (let entry of sortedEntries.sort(compareByName)) {
|
|
count++;
|
|
writeEntry(entry);
|
|
}
|
|
writeString("};\n");
|
|
|
|
writeString("\n// Pinning Preload List Length = " + count + ";\n");
|
|
writeString("\nstatic const int32_t kUnknownId = -1;\n");
|
|
}
|
|
|
|
function writeFile(certNameToSKD, certSKDToName,
|
|
chromeImportedPinsets, chromeImportedEntries) {
|
|
// Compute used pins from both Chrome's and our pinsets, so we can output
|
|
// them later.
|
|
usedFingerprints = {};
|
|
gStaticPins.pinsets.forEach(function(pinset) {
|
|
// We aren't guaranteed to have sha1_hashes in our own JSON.
|
|
if (pinset.sha1_hashes) {
|
|
pinset.sha1_hashes.forEach(function(name) {
|
|
usedFingerprints[name] = true;
|
|
});
|
|
}
|
|
if (pinset.sha256_hashes) {
|
|
pinset.sha256_hashes.forEach(function(name) {
|
|
usedFingerprints[name] = true;
|
|
});
|
|
}
|
|
});
|
|
for (let key in chromeImportedPinsets) {
|
|
let pinset = chromeImportedPinsets[key];
|
|
pinset.sha1_hashes.forEach(function(name) {
|
|
usedFingerprints[name] = true;
|
|
});
|
|
pinset.sha256_hashes.forEach(function(name) {
|
|
usedFingerprints[name] = true;
|
|
});
|
|
}
|
|
|
|
writeString(FILE_HEADER);
|
|
|
|
// Write actual fingerprints.
|
|
Object.keys(usedFingerprints).sort().forEach(function(certName) {
|
|
if (certName) {
|
|
writeString("/* " + certName + " */\n");
|
|
writeString("static const char " + nameToAlias(certName) + "[] =\n");
|
|
writeString(" \"" + certNameToSKD[certName] + "\";\n");
|
|
writeString("\n");
|
|
}
|
|
});
|
|
|
|
// Write the pinsets
|
|
writeString(PINSETDEF);
|
|
writeString("/* PreloadedHPKPins.json pinsets */\n");
|
|
gStaticPins.pinsets.sort(compareByName).forEach(function(pinset) {
|
|
writeFullPinset(certNameToSKD, certSKDToName, pinset);
|
|
});
|
|
writeString("/* Chrome static pinsets */\n");
|
|
for (let key in chromeImportedPinsets) {
|
|
writeFullPinset(certNameToSKD, certSKDToName, chromeImportedPinsets[key]);
|
|
}
|
|
|
|
// Write the domainlist entries.
|
|
writeString(DOMAINHEADER);
|
|
writeDomainList(chromeImportedEntries);
|
|
writeString("\n");
|
|
writeString(genExpirationTime());
|
|
}
|
|
|
|
function loadExtraCertificates(certStringList) {
|
|
let constructedCerts = [];
|
|
for (let certString of certStringList) {
|
|
constructedCerts.push(gCertDB.constructX509FromBase64(certString));
|
|
}
|
|
return constructedCerts;
|
|
}
|
|
|
|
let extraCertificates = loadExtraCertificates(gStaticPins.extra_certificates);
|
|
let [ certNameToSKD, certSKDToName ] = loadNSSCertinfo(gTestCertFile,
|
|
extraCertificates);
|
|
let [ chromeNameToHash, chromeNameToMozName ] = downloadAndParseChromeCerts(
|
|
gStaticPins.chromium_data.cert_file_url, certSKDToName);
|
|
let [ chromeImportedPinsets, chromeImportedEntries ] =
|
|
downloadAndParseChromePins(gStaticPins.chromium_data.json_file_url,
|
|
chromeNameToHash, chromeNameToMozName, certNameToSKD, certSKDToName);
|
|
|
|
writeFile(certNameToSKD, certSKDToName, chromeImportedPinsets,
|
|
chromeImportedEntries);
|
|
|
|
FileUtils.closeSafeFileOutputStream(gFileOutputStream);
|