385 lines
11 KiB
C#
385 lines
11 KiB
C#
//
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// mozroots.cs: Import the Mozilla's trusted root certificates into Mono
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//
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// Authors:
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// Sebastien Pouliot <sebastien@ximian.com>
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//
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// Copyright (C) 2005 Novell, Inc (http://www.novell.com)
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System;
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using System.Collections;
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using System.IO;
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using System.Net;
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using System.Reflection;
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using System.Security.Cryptography;
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using System.Text;
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using Mono.Security.Authenticode;
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using Mono.Security.X509;
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[assembly: AssemblyTitle("Mozilla Roots Importer")]
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[assembly: AssemblyDescription("Download and import trusted root certificates from Mozilla's MXR.")]
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namespace Mono.Tools
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{
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class MozRoots
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{
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// this URL is recommended by https://bugzilla.mozilla.org/show_bug.cgi?id=1279952#c8 and is also used as basis for curl's https://curl.haxx.se/ca/cacert.pem bundle
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private const string defaultUrl = "https://hg.mozilla.org/releases/mozilla-release/raw-file/default/security/nss/lib/ckfw/builtins/certdata.txt";
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static string url;
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static string inputFile;
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static string pkcs7filename;
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static bool import;
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static bool machine;
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static bool confirmAddition;
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static bool confirmRemoval;
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static bool quiet;
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static byte[] DecodeOctalString(string s)
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{
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string[] pieces = s.Split('\\');
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byte[] data = new byte[pieces.Length - 1];
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for (int i = 1; i < pieces.Length; i++)
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{
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data[i - 1] = (byte)((pieces[i][0] - '0' << 6) + (pieces[i][1] - '0' << 3) + (pieces[i][2] - '0'));
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}
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return data;
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}
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static X509Certificate DecodeCertificate(string s)
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{
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byte[] rawdata = DecodeOctalString(s);
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return new X509Certificate(rawdata);
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}
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static Stream GetFile()
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{
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try
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{
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if (inputFile != null)
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{
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return File.OpenRead(inputFile);
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}
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else {
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WriteLine("Downloading from '{0}'...", url);
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HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url);
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req.Timeout = 10000;
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return req.GetResponse().GetResponseStream();
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}
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}
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catch
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{
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return null;
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}
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}
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static X509CertificateCollection DecodeCollection()
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{
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X509CertificateCollection roots = new X509CertificateCollection();
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StringBuilder sb = new StringBuilder();
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bool processing = false;
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using (Stream s = GetFile())
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{
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if (s == null)
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{
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WriteLine("Couldn't retrieve the file using the supplied information.");
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return null;
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}
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StreamReader sr = new StreamReader(s);
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while (true)
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{
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string line = sr.ReadLine();
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if (line == null)
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break;
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if (processing)
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{
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if (line.StartsWith("END"))
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{
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processing = false;
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X509Certificate root = DecodeCertificate(sb.ToString());
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roots.Add(root);
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sb = new StringBuilder();
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continue;
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}
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sb.Append(line);
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}
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else {
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processing = line.StartsWith("CKA_VALUE MULTILINE_OCTAL");
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}
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}
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return roots;
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}
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}
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static int Process()
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{
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ServicePointManager.ServerCertificateValidationCallback = (sender, certificate, chain, sslPolicyErrors) =>
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{
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if (sslPolicyErrors != System.Net.Security.SslPolicyErrors.None)
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Console.WriteLine("WARNING: Downloading the trusted certificate list couldn't be done securely (error: {0}), continuing anyway. If you're using mozroots to bootstrap Mono's trust store on a clean system this might be OK, otherwise it could indicate a network intrusion. Please ensure you're using a trusted network or move to cert-sync.", sslPolicyErrors);
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// this is very bad, but on a clean system without an existing trust store we don't really have a better option
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return true;
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};
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X509CertificateCollection roots = DecodeCollection();
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if (roots == null)
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{
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return 1;
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}
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else if (roots.Count == 0)
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{
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WriteLine("No certificates were found.");
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return 0;
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}
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if (pkcs7filename != null)
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{
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SoftwarePublisherCertificate pkcs7 = new SoftwarePublisherCertificate();
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pkcs7.Certificates.AddRange(roots);
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WriteLine("Saving root certificates into '{0}' file...", pkcs7filename);
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using (FileStream fs = File.OpenWrite(pkcs7filename))
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{
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byte[] data = pkcs7.GetBytes();
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fs.Write(data, 0, data.Length);
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fs.Close();
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}
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}
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if (import)
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{
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WriteLine("Importing certificates into {0} store...",
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machine ? "machine" : "user");
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X509Stores stores = (machine ? X509StoreManager.LocalMachine : X509StoreManager.CurrentUser);
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X509CertificateCollection trusted = stores.TrustedRoot.Certificates;
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int additions = 0;
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foreach (X509Certificate root in roots)
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{
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if (!trusted.Contains(root))
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{
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if (!confirmAddition || AskConfirmation("add", root))
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{
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stores.TrustedRoot.Import(root);
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if (confirmAddition)
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WriteLine("Certificate added.{0}", Environment.NewLine);
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additions++;
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}
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}
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}
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if (additions > 0)
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WriteLine("{0} new root certificates were added to your trust store.", additions);
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X509CertificateCollection removed = new X509CertificateCollection();
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foreach (X509Certificate trust in trusted)
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{
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if (!roots.Contains(trust))
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{
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removed.Add(trust);
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}
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}
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if (removed.Count > 0)
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{
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if (confirmRemoval)
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{
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WriteLine("{0} previously trusted certificates were not part of the update.", removed.Count);
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}
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else {
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WriteLine("{0} previously trusted certificates were removed.", removed.Count);
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}
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foreach (X509Certificate old in removed)
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{
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if (!confirmRemoval || AskConfirmation("remove", old))
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{
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stores.TrustedRoot.Remove(old);
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if (confirmRemoval)
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WriteLine("Certificate removed.{0}", Environment.NewLine);
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}
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}
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}
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WriteLine("Import process completed.{0}", Environment.NewLine);
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}
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return 0;
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}
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static string Thumbprint(string algorithm, X509Certificate certificate)
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{
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HashAlgorithm hash = HashAlgorithm.Create(algorithm);
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byte[] digest = hash.ComputeHash(certificate.RawData);
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return BitConverter.ToString(digest);
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}
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static bool AskConfirmation(string action, X509Certificate certificate)
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{
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// the quiet flag is ignored for confirmations
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Console.WriteLine();
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Console.WriteLine("Issuer: {0}", certificate.IssuerName);
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Console.WriteLine("Serial number: {0}", BitConverter.ToString(certificate.SerialNumber));
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Console.WriteLine("Valid from {0} to {1}", certificate.ValidFrom, certificate.ValidUntil);
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Console.WriteLine("Thumbprint SHA-1: {0}", Thumbprint("SHA1", certificate));
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Console.WriteLine("Thumbprint MD5: {0}", Thumbprint("MD5", certificate));
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while (true)
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{
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Console.Write("Are you sure you want to {0} this certificate ? ", action);
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string s = Console.ReadLine().ToLower();
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if (s == "yes")
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return true;
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else if (s == "no")
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return false;
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}
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}
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static bool ParseOptions(string[] args)
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{
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if (args.Length < 1)
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return false;
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// set defaults
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url = defaultUrl;
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confirmAddition = true;
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confirmRemoval = true;
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for (int i = 0; i < args.Length; i++)
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{
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switch (args[i])
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{
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case "--url":
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if (i >= args.Length - 1)
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return false;
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url = args[++i];
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break;
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case "--file":
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if (i >= args.Length - 1)
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return false;
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inputFile = args[++i];
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break;
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case "--pkcs7":
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if (i >= args.Length - 1)
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return false;
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pkcs7filename = args[++i];
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break;
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case "--import":
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import = true;
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break;
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case "--machine":
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machine = true;
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break;
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case "--sync":
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confirmAddition = false;
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confirmRemoval = false;
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break;
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case "--ask":
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confirmAddition = true;
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confirmRemoval = true;
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break;
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case "--ask-add":
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confirmAddition = true;
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confirmRemoval = false;
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break;
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case "--ask-remove":
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confirmAddition = false;
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confirmRemoval = true;
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break;
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case "--quiet":
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quiet = true;
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break;
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default:
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WriteLine("Unknown option '{0}'.");
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return false;
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}
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}
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return true;
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}
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static void Header()
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{
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Console.WriteLine(System.Reflection.Assembly.GetExecutingAssembly().ToString());
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Console.WriteLine("WARNING: mozroots is deprecated, please move to cert-sync instead.");
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Console.WriteLine();
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}
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static void Help()
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{
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Console.WriteLine("Usage: mozroots [--import [--machine] [--sync | --ask | --ask-add | --ask-remove]]");
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Console.WriteLine("Where the basic options are:");
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Console.WriteLine(" --import\tImport the certificates into the trust store.");
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Console.WriteLine(" --sync\t\tSynchronize (add/remove) the trust store with the certificates.");
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Console.WriteLine(" --ask\t\tAlways confirm before adding or removing trusted certificates.");
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Console.WriteLine(" --ask-add\tAlways confirm before adding a new trusted certificate.");
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Console.WriteLine(" --ask-remove\tAlways confirm before removing an existing trusted certificate.");
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Console.WriteLine("{0}and the advanced options are", Environment.NewLine);
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Console.WriteLine(" --url url\tSpecify an alternative URL for downloading the trusted");
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Console.WriteLine("\t\tcertificates (MXR source format).");
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Console.WriteLine(" --file name\tDo not download but use the specified file.");
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Console.WriteLine(" --pkcs7 name\tExport the certificates into a PKCS#7 file.");
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Console.WriteLine(" --machine\tImport the certificate in the machine trust store.");
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Console.WriteLine("\t\tThe default is to import into the user store.");
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Console.WriteLine(" --quiet\tLimit console output to errors and confirmations messages.");
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}
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static void WriteLine(string str)
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{
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if (!quiet)
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Console.WriteLine(str);
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}
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static void WriteLine(string format, params object[] args)
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{
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if (!quiet)
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Console.WriteLine(format, args);
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}
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static int Main(string[] args)
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{
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try
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{
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if (!ParseOptions(args))
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{
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Header();
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Help();
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return 1;
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}
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if (!quiet)
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{
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Header();
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}
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return Process();
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}
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catch (Exception e)
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{
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// ignore quiet on exception
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Console.WriteLine("Error: {0}", e);
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return 1;
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}
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}
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}
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} |