The Tor Browser: toolkit/modules/CertUtils.jsm@6474c204b198 (annotated)

toolkit/modules/CertUtils.jsm@6474c204b198 (annotated)

toolkit/modules/CertUtils.jsm

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 #if 0
 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 #endif
 this.EXPORTED_SYMBOLS = [ "BadCertHandler", "checkCert", "readCertPrefs", "validateCert" ];
 const Ce = Components.Exception;
 const Ci = Components.interfaces;
 const Cr = Components.results;
 const Cu = Components.utils;
 Components.utils.import("resource://gre/modules/Services.jsm");
 /**
  * Reads a set of expected certificate attributes from preferences. The returned
  * array can be passed to validateCert or checkCert to validate that a
  * certificate matches the expected attributes. The preferences should look like
  * this:
  *   prefix.1.attribute1
  *   prefix.1.attribute2
  *   prefix.2.attribute1
  *   etc.
  * Each numeric branch contains a set of required attributes for a single
  * certificate. Having multiple numeric branches means that multiple
  * certificates would be accepted by validateCert.
  *
  * @param  aPrefBranch
  *         The prefix for all preferences, should end with a ".".
  * @return An array of JS objects with names / values corresponding to the
  *         expected certificate's attribute names / values.
  */
 this.readCertPrefs =
   function readCertPrefs(aPrefBranch) {
   if (Services.prefs.getBranch(aPrefBranch).getChildList("").length == 0)
     return null;
   let certs = [];
   let counter = 1;
   while (true) {
     let prefBranchCert = Services.prefs.getBranch(aPrefBranch + counter + ".");
     let prefCertAttrs = prefBranchCert.getChildList("");
     if (prefCertAttrs.length == 0)
       break;
     let certAttrs = {};
     for each (let prefCertAttr in prefCertAttrs)
       certAttrs[prefCertAttr] = prefBranchCert.getCharPref(prefCertAttr);
     certs.push(certAttrs);
     counter++;
   }
   return certs;
 }
 /**
  * Verifies that an nsIX509Cert matches the expected certificate attribute
  * values.
  *
  * @param  aCertificate
  *         The nsIX509Cert to compare to the expected attributes.
  * @param  aCerts
  *         An array of JS objects with names / values corresponding to the
  *         expected certificate's attribute names / values. If this is null or
  *         an empty array then no checks are performed.
  * @throws NS_ERROR_ILLEGAL_VALUE if a certificate attribute name from the
  *         aCerts param does not exist or the value for a certificate attribute
  *         from the aCerts param is different than the expected value or
  *         aCertificate wasn't specified and aCerts is not null or an empty
  *         array.
  */
 this.validateCert =
   function validateCert(aCertificate, aCerts) {
   // If there are no certificate requirements then just exit
   if (!aCerts || aCerts.length == 0)
     return;
   if (!aCertificate) {
     const missingCertErr = "A required certificate was not present.";
     Cu.reportError(missingCertErr);
     throw new Ce(missingCertErr, Cr.NS_ERROR_ILLEGAL_VALUE);
   }
   var errors = [];
   for (var i = 0; i < aCerts.length; ++i) {
     var error = false;
     var certAttrs = aCerts[i];
     for (var name in certAttrs) {
       if (!(name in aCertificate)) {
         error = true;
         errors.push("Expected attribute '" + name + "' not present in " +
                     "certificate.");
         break;
       }
       if (aCertificate[name] != certAttrs[name]) {
         error = true;
         errors.push("Expected certificate attribute '" + name + "' " +
                     "value incorrect, expected: '" + certAttrs[name] +
                     "', got: '" + aCertificate[name] + "'.");
         break;
       }
     }
     if (!error)
       break;
   }
   if (error) {
     errors.forEach(Cu.reportError.bind(Cu));
     const certCheckErr = "Certificate checks failed. See previous errors " +
                          "for details.";
     Cu.reportError(certCheckErr);
     throw new Ce(certCheckErr, Cr.NS_ERROR_ILLEGAL_VALUE);
   }
 }
 /**
  * Checks if the connection must be HTTPS and if so, only allows built-in
  * certificates and validates application specified certificate attribute
  * values.
  * See bug 340198 and bug 544442.
  *
  * @param  aChannel
  *         The nsIChannel that will have its certificate checked.
  * @param  aAllowNonBuiltInCerts (optional)
  *         When true certificates that aren't builtin are allowed. When false
  *         or not specified the certificate must be a builtin certificate.
  * @param  aCerts (optional)
  *         An array of JS objects with names / values corresponding to the
  *         channel's expected certificate's attribute names / values. If it
  *         isn't null or not specified the the scheme for the channel's
  *         originalURI must be https.
  * @throws NS_ERROR_UNEXPECTED if a certificate is expected and the URI scheme
  *         is not https.
  *         NS_ERROR_ILLEGAL_VALUE if a certificate attribute name from the
  *         aCerts param does not exist or the value for a certificate attribute
  *         from the aCerts  param is different than the expected value.
  *         NS_ERROR_ABORT if the certificate issuer is not built-in.
  */
 this.checkCert =
   function checkCert(aChannel, aAllowNonBuiltInCerts, aCerts) {
   if (!aChannel.originalURI.schemeIs("https")) {
     // Require https if there are certificate values to verify
     if (aCerts) {
       throw new Ce("SSL is required and URI scheme is not https.",
                    Cr.NS_ERROR_UNEXPECTED);
     }
     return;
   }
   var cert =
       aChannel.securityInfo.QueryInterface(Ci.nsISSLStatusProvider).
       SSLStatus.QueryInterface(Ci.nsISSLStatus).serverCert;
   validateCert(cert, aCerts);
   if (aAllowNonBuiltInCerts ===  true)
     return;
   var issuerCert = cert;
   while (issuerCert.issuer && !issuerCert.issuer.equals(issuerCert))
     issuerCert = issuerCert.issuer;
   const certNotBuiltInErr = "Certificate issuer is not built-in.";
   if (!issuerCert)
     throw new Ce(certNotBuiltInErr, Cr.NS_ERROR_ABORT);
   issuerCert = issuerCert.QueryInterface(Ci.nsIX509Cert3);
   var tokenNames = issuerCert.getAllTokenNames({});
   if (!tokenNames || !tokenNames.some(isBuiltinToken))
     throw new Ce(certNotBuiltInErr, Cr.NS_ERROR_ABORT);
 }
 function isBuiltinToken(tokenName) {
   return tokenName == "Builtin Object Token";
 }
 /**
  * This class implements nsIBadCertListener.  Its job is to prevent "bad cert"
  * security dialogs from being shown to the user.  It is better to simply fail
  * if the certificate is bad. See bug 304286.
  *
  * @param  aAllowNonBuiltInCerts (optional)
  *         When true certificates that aren't builtin are allowed. When false
  *         or not specified the certificate must be a builtin certificate.
  */
 this.BadCertHandler =
   function BadCertHandler(aAllowNonBuiltInCerts) {
   this.allowNonBuiltInCerts = aAllowNonBuiltInCerts;
 }
 BadCertHandler.prototype = {
   // nsIChannelEventSink
   asyncOnChannelRedirect: function(oldChannel, newChannel, flags, callback) {
     if (this.allowNonBuiltInCerts) {
       callback.onRedirectVerifyCallback(Components.results.NS_OK);
       return;
     }
     // make sure the certificate of the old channel checks out before we follow
     // a redirect from it.  See bug 340198.
     // Don't call checkCert for internal redirects. See bug 569648.
     if (!(flags & Ci.nsIChannelEventSink.REDIRECT_INTERNAL))
       checkCert(oldChannel);
     callback.onRedirectVerifyCallback(Components.results.NS_OK);
   },
   // nsIInterfaceRequestor
   getInterface: function(iid) {
     return this.QueryInterface(iid);
   },
   // nsISupports
   QueryInterface: function(iid) {
     if (!iid.equals(Ci.nsIChannelEventSink) &&
         !iid.equals(Ci.nsIInterfaceRequestor) &&
         !iid.equals(Ci.nsISupports))
       throw Cr.NS_ERROR_NO_INTERFACE;
     return this;
   }
 };

The Tor Browser / annotate

toolkit/modules/CertUtils.jsm@6474c204b198 (annotated)

toolkit/modules/CertUtils.jsm