688 lines
19 KiB
C#
688 lines
19 KiB
C#
//
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// System.Security.Cryptography.X509Certificate2 class
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//
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// Author:
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// Sebastien Pouliot <sebastien@ximian.com>
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//
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// (C) 2003 Motus Technologies Inc. (http://www.motus.com)
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// Copyright (C) 2004-2006 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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#if SECURITY_DEP
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#if MONOTOUCH || MONODROID
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using Mono.Security;
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using Mono.Security.Cryptography;
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using MX = Mono.Security.X509;
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#else
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extern alias MonoSecurity;
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using MonoSecurity::Mono.Security;
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using MonoSecurity::Mono.Security.Cryptography;
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using MX = MonoSecurity::Mono.Security.X509;
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#endif
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#endif
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using System.IO;
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using System.Text;
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namespace System.Security.Cryptography.X509Certificates {
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#if NET_4_0
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[Serializable]
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#endif
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public class X509Certificate2 : X509Certificate {
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#if !SECURITY_DEP
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// Used in Mono.Security HttpsClientStream
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public X509Certificate2 (byte[] rawData)
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{
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}
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#endif
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#if SECURITY_DEP
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private bool _archived;
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private X509ExtensionCollection _extensions;
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private string _name = String.Empty;
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private string _serial;
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private PublicKey _publicKey;
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private X500DistinguishedName issuer_name;
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private X500DistinguishedName subject_name;
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private Oid signature_algorithm;
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private MX.X509Certificate _cert;
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private static string empty_error = Locale.GetText ("Certificate instance is empty.");
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// constructors
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public X509Certificate2 ()
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{
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_cert = null;
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}
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public X509Certificate2 (byte[] rawData)
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{
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Import (rawData, (string)null, X509KeyStorageFlags.DefaultKeySet);
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}
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public X509Certificate2 (byte[] rawData, string password)
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{
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Import (rawData, password, X509KeyStorageFlags.DefaultKeySet);
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}
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public X509Certificate2 (byte[] rawData, SecureString password)
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{
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Import (rawData, password, X509KeyStorageFlags.DefaultKeySet);
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}
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public X509Certificate2 (byte[] rawData, string password, X509KeyStorageFlags keyStorageFlags)
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{
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Import (rawData, password, keyStorageFlags);
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}
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public X509Certificate2 (byte[] rawData, SecureString password, X509KeyStorageFlags keyStorageFlags)
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{
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Import (rawData, password, keyStorageFlags);
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}
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public X509Certificate2 (string fileName)
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{
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Import (fileName, String.Empty, X509KeyStorageFlags.DefaultKeySet);
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}
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public X509Certificate2 (string fileName, string password)
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{
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Import (fileName, password, X509KeyStorageFlags.DefaultKeySet);
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}
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public X509Certificate2 (string fileName, SecureString password)
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{
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Import (fileName, password, X509KeyStorageFlags.DefaultKeySet);
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}
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public X509Certificate2 (string fileName, string password, X509KeyStorageFlags keyStorageFlags)
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{
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Import (fileName, password, keyStorageFlags);
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}
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public X509Certificate2 (string fileName, SecureString password, X509KeyStorageFlags keyStorageFlags)
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{
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Import (fileName, password, keyStorageFlags);
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}
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public X509Certificate2 (IntPtr handle) : base (handle)
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{
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_cert = new MX.X509Certificate (base.GetRawCertData ());
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}
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public X509Certificate2 (X509Certificate certificate)
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: base (certificate)
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{
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_cert = new MX.X509Certificate (base.GetRawCertData ());
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}
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// properties
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public bool Archived {
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get {
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if (_cert == null)
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throw new CryptographicException (empty_error);
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return _archived;
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}
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set {
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if (_cert == null)
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throw new CryptographicException (empty_error);
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_archived = value;
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}
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}
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public X509ExtensionCollection Extensions {
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get {
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if (_cert == null)
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throw new CryptographicException (empty_error);
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if (_extensions == null)
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_extensions = new X509ExtensionCollection (_cert);
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return _extensions;
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}
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}
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public string FriendlyName {
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get {
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if (_cert == null)
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throw new CryptographicException (empty_error);
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return _name;
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}
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set {
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if (_cert == null)
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throw new CryptographicException (empty_error);
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_name = value;
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}
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}
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// FIXME - Could be more efficient
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public bool HasPrivateKey {
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get { return PrivateKey != null; }
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}
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public X500DistinguishedName IssuerName {
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get {
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if (_cert == null)
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throw new CryptographicException (empty_error);
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if (issuer_name == null)
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issuer_name = new X500DistinguishedName (_cert.GetIssuerName ().GetBytes ());
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return issuer_name;
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}
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}
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public DateTime NotAfter {
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get {
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if (_cert == null)
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throw new CryptographicException (empty_error);
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return _cert.ValidUntil.ToLocalTime ();
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}
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}
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public DateTime NotBefore {
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get {
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if (_cert == null)
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throw new CryptographicException (empty_error);
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return _cert.ValidFrom.ToLocalTime ();
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}
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}
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public AsymmetricAlgorithm PrivateKey {
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get {
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if (_cert == null)
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throw new CryptographicException (empty_error);
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try {
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if (_cert.RSA != null) {
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RSACryptoServiceProvider rcsp = _cert.RSA as RSACryptoServiceProvider;
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if (rcsp != null)
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return rcsp.PublicOnly ? null : rcsp;
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RSAManaged rsam = _cert.RSA as RSAManaged;
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if (rsam != null)
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return rsam.PublicOnly ? null : rsam;
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_cert.RSA.ExportParameters (true);
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return _cert.RSA;
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} else if (_cert.DSA != null) {
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DSACryptoServiceProvider dcsp = _cert.DSA as DSACryptoServiceProvider;
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if (dcsp != null)
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return dcsp.PublicOnly ? null : dcsp;
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_cert.DSA.ExportParameters (true);
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return _cert.DSA;
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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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set {
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if (_cert == null)
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throw new CryptographicException (empty_error);
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// allow NULL so we can "forget" the key associated to the certificate
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// e.g. in case we want to export it in another format (see bug #396620)
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if (value == null) {
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_cert.RSA = null;
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_cert.DSA = null;
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} else if (value is RSA)
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_cert.RSA = (RSA) value;
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else if (value is DSA)
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_cert.DSA = (DSA) value;
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else
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throw new NotSupportedException ();
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}
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}
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public PublicKey PublicKey {
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get {
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if (_cert == null)
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throw new CryptographicException (empty_error);
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if (_publicKey == null) {
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try {
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_publicKey = new PublicKey (_cert);
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}
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catch (Exception e) {
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string msg = Locale.GetText ("Unable to decode public key.");
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throw new CryptographicException (msg, e);
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}
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}
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return _publicKey;
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}
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}
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public byte[] RawData {
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get {
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if (_cert == null)
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throw new CryptographicException (empty_error);
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return base.GetRawCertData ();
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}
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}
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public string SerialNumber {
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get {
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if (_cert == null)
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throw new CryptographicException (empty_error);
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if (_serial == null) {
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StringBuilder sb = new StringBuilder ();
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byte[] serial = _cert.SerialNumber;
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for (int i=serial.Length - 1; i >= 0; i--)
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sb.Append (serial [i].ToString ("X2"));
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_serial = sb.ToString ();
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}
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return _serial;
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}
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}
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public Oid SignatureAlgorithm {
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get {
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if (_cert == null)
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throw new CryptographicException (empty_error);
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if (signature_algorithm == null)
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signature_algorithm = new Oid (_cert.SignatureAlgorithm);
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return signature_algorithm;
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}
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}
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public X500DistinguishedName SubjectName {
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get {
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if (_cert == null)
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throw new CryptographicException (empty_error);
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if (subject_name == null)
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subject_name = new X500DistinguishedName (_cert.GetSubjectName ().GetBytes ());
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return subject_name;
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}
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}
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public string Thumbprint {
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get { return base.GetCertHashString (); }
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}
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public int Version {
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get {
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if (_cert == null)
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throw new CryptographicException (empty_error);
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return _cert.Version;
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}
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}
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// methods
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[MonoTODO ("always return String.Empty for UpnName, DnsFromAlternativeName and UrlName")]
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public string GetNameInfo (X509NameType nameType, bool forIssuer)
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{
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switch (nameType) {
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case X509NameType.SimpleName:
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if (_cert == null)
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throw new CryptographicException (empty_error);
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// return CN= or, if missing, the first part of the DN
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ASN1 sn = forIssuer ? _cert.GetIssuerName () : _cert.GetSubjectName ();
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ASN1 dn = Find (commonName, sn);
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if (dn != null)
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return GetValueAsString (dn);
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if (sn.Count == 0)
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return String.Empty;
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ASN1 last_entry = sn [sn.Count - 1];
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if (last_entry.Count == 0)
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return String.Empty;
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return GetValueAsString (last_entry [0]);
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case X509NameType.EmailName:
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// return the E= part of the DN (if present)
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ASN1 e = Find (email, forIssuer ? _cert.GetIssuerName () : _cert.GetSubjectName ());
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if (e != null)
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return GetValueAsString (e);
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return String.Empty;
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case X509NameType.UpnName:
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// FIXME - must find/create test case
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return String.Empty;
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case X509NameType.DnsName:
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// return the CN= part of the DN (if present)
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ASN1 cn = Find (commonName, forIssuer ? _cert.GetIssuerName () : _cert.GetSubjectName ());
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if (cn != null)
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return GetValueAsString (cn);
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return String.Empty;
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case X509NameType.DnsFromAlternativeName:
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// FIXME - must find/create test case
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return String.Empty;
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case X509NameType.UrlName:
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// FIXME - must find/create test case
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return String.Empty;
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default:
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throw new ArgumentException ("nameType");
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}
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}
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static byte[] commonName = { 0x55, 0x04, 0x03 };
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static byte[] email = { 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x09, 0x01 };
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private ASN1 Find (byte[] oid, ASN1 dn)
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{
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if (dn.Count == 0)
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return null;
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// process SET
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for (int i = 0; i < dn.Count; i++) {
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ASN1 set = dn [i];
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for (int j = 0; j < set.Count; j++) {
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ASN1 pair = set [j];
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if (pair.Count != 2)
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continue;
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ASN1 poid = pair [0];
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if (poid == null)
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continue;
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if (poid.CompareValue (oid))
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return pair;
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}
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}
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return null;
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}
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private string GetValueAsString (ASN1 pair)
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{
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if (pair.Count != 2)
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return String.Empty;
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ASN1 value = pair [1];
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if ((value.Value == null) || (value.Length == 0))
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return String.Empty;
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if (value.Tag == 0x1E) {
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// BMPSTRING
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StringBuilder sb = new StringBuilder ();
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for (int j = 1; j < value.Value.Length; j += 2)
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sb.Append ((char)value.Value [j]);
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return sb.ToString ();
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} else {
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return Encoding.UTF8.GetString (value.Value);
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}
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}
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private MX.X509Certificate ImportPkcs12 (byte[] rawData, string password)
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{
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MX.PKCS12 pfx = (password == null) ? new MX.PKCS12 (rawData) : new MX.PKCS12 (rawData, password);
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if (pfx.Certificates.Count == 0) {
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// no certificate was found
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return null;
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} else if (pfx.Keys.Count == 0) {
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// no key were found - pick the first certificate
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return pfx.Certificates [0];
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} else {
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// find the certificate that match the first key
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MX.X509Certificate cert = null;
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var keypair = (pfx.Keys [0] as AsymmetricAlgorithm);
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string pubkey = keypair.ToXmlString (false);
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foreach (var c in pfx.Certificates) {
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if (((c.RSA != null) && (pubkey == c.RSA.ToXmlString (false))) ||
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((c.DSA != null) && (pubkey == c.DSA.ToXmlString (false)))) {
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cert = c;
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break;
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}
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}
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if (cert == null) {
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cert = pfx.Certificates [0]; // no match, pick first certificate without keys
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} else {
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cert.RSA = (keypair as RSA);
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cert.DSA = (keypair as DSA);
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}
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return cert;
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}
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}
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public override void Import (byte[] rawData)
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{
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Import (rawData, (string)null, X509KeyStorageFlags.DefaultKeySet);
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}
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[MonoTODO ("missing KeyStorageFlags support")]
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public override void Import (byte[] rawData, string password, X509KeyStorageFlags keyStorageFlags)
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{
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MX.X509Certificate cert = null;
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if (password == null) {
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try {
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cert = new MX.X509Certificate (rawData);
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}
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catch (Exception e) {
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try {
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cert = ImportPkcs12 (rawData, null);
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}
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catch {
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string msg = Locale.GetText ("Unable to decode certificate.");
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// inner exception is the original (not second) exception
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throw new CryptographicException (msg, e);
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}
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}
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} else {
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// try PKCS#12
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try {
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cert = ImportPkcs12 (rawData, password);
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}
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catch {
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// it's possible to supply a (unrequired/unusued) password
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// fix bug #79028
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cert = new MX.X509Certificate (rawData);
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}
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}
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// we do not have to fully re-decode the certificate since X509Certificate does not deal with keys
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if (cert != null) {
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base.Import (cert.RawData, (string) null, keyStorageFlags);
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_cert = cert; // becuase base call will call Reset!
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}
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}
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[MonoTODO ("SecureString is incomplete")]
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public override void Import (byte[] rawData, SecureString password, X509KeyStorageFlags keyStorageFlags)
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{
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Import (rawData, (string) null, keyStorageFlags);
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}
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public override void Import (string fileName)
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{
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byte[] rawData = File.ReadAllBytes (fileName);
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Import (rawData, (string)null, X509KeyStorageFlags.DefaultKeySet);
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}
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[MonoTODO ("missing KeyStorageFlags support")]
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public override void Import (string fileName, string password, X509KeyStorageFlags keyStorageFlags)
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{
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byte[] rawData = File.ReadAllBytes (fileName);
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Import (rawData, password, keyStorageFlags);
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}
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[MonoTODO ("SecureString is incomplete")]
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public override void Import (string fileName, SecureString password, X509KeyStorageFlags keyStorageFlags)
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{
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byte[] rawData = File.ReadAllBytes (fileName);
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Import (rawData, (string)null, keyStorageFlags);
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}
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public override void Reset ()
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{
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_cert = null;
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_archived = false;
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_extensions = null;
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_name = String.Empty;
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_serial = null;
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_publicKey = null;
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issuer_name = null;
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subject_name = null;
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signature_algorithm = null;
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base.Reset ();
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}
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public override string ToString ()
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{
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if (_cert == null)
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return "System.Security.Cryptography.X509Certificates.X509Certificate2";
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return base.ToString (true);
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}
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public override string ToString (bool verbose)
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{
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if (_cert == null)
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return "System.Security.Cryptography.X509Certificates.X509Certificate2";
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// the non-verbose X509Certificate2 == verbose X509Certificate
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if (!verbose)
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return base.ToString (true);
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string nl = Environment.NewLine;
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StringBuilder sb = new StringBuilder ();
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sb.AppendFormat ("[Version]{0} V{1}{0}{0}", nl, Version);
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sb.AppendFormat ("[Subject]{0} {1}{0}{0}", nl, Subject);
|
|
sb.AppendFormat ("[Issuer]{0} {1}{0}{0}", nl, Issuer);
|
|
sb.AppendFormat ("[Serial Number]{0} {1}{0}{0}", nl, SerialNumber);
|
|
sb.AppendFormat ("[Not Before]{0} {1}{0}{0}", nl, NotBefore);
|
|
sb.AppendFormat ("[Not After]{0} {1}{0}{0}", nl, NotAfter);
|
|
sb.AppendFormat ("[Thumbprint]{0} {1}{0}{0}", nl, Thumbprint);
|
|
sb.AppendFormat ("[Signature Algorithm]{0} {1}({2}){0}{0}", nl, SignatureAlgorithm.FriendlyName,
|
|
SignatureAlgorithm.Value);
|
|
|
|
AsymmetricAlgorithm key = PublicKey.Key;
|
|
sb.AppendFormat ("[Public Key]{0} Algorithm: ", nl);
|
|
if (key is RSA)
|
|
sb.Append ("RSA");
|
|
else if (key is DSA)
|
|
sb.Append ("DSA");
|
|
else
|
|
sb.Append (key.ToString ());
|
|
sb.AppendFormat ("{0} Length: {1}{0} Key Blob: ", nl, key.KeySize);
|
|
AppendBuffer (sb, PublicKey.EncodedKeyValue.RawData);
|
|
sb.AppendFormat ("{0} Parameters: ", nl);
|
|
AppendBuffer (sb, PublicKey.EncodedParameters.RawData);
|
|
sb.Append (nl);
|
|
|
|
return sb.ToString ();
|
|
}
|
|
|
|
private static void AppendBuffer (StringBuilder sb, byte[] buffer)
|
|
{
|
|
if (buffer == null)
|
|
return;
|
|
for (int i=0; i < buffer.Length; i++) {
|
|
sb.Append (buffer [i].ToString ("x2"));
|
|
if (i < buffer.Length - 1)
|
|
sb.Append (" ");
|
|
}
|
|
}
|
|
|
|
[MonoTODO ("by default this depends on the incomplete X509Chain")]
|
|
public bool Verify ()
|
|
{
|
|
if (_cert == null)
|
|
throw new CryptographicException (empty_error);
|
|
|
|
X509Chain chain = X509Chain.Create ();
|
|
if (!chain.Build (this))
|
|
return false;
|
|
// TODO - check chain and other stuff ???
|
|
return true;
|
|
}
|
|
|
|
// static methods
|
|
|
|
private static byte[] signedData = new byte[] { 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x07, 0x02 };
|
|
|
|
[MonoTODO ("Detection limited to Cert, Pfx, Pkcs12, Pkcs7 and Unknown")]
|
|
public static X509ContentType GetCertContentType (byte[] rawData)
|
|
{
|
|
if ((rawData == null) || (rawData.Length == 0))
|
|
throw new ArgumentException ("rawData");
|
|
|
|
X509ContentType type = X509ContentType.Unknown;
|
|
try {
|
|
ASN1 data = new ASN1 (rawData);
|
|
if (data.Tag != 0x30) {
|
|
string msg = Locale.GetText ("Unable to decode certificate.");
|
|
throw new CryptographicException (msg);
|
|
}
|
|
|
|
if (data.Count == 0)
|
|
return type;
|
|
|
|
if (data.Count == 3) {
|
|
switch (data [0].Tag) {
|
|
case 0x30:
|
|
// SEQUENCE / SEQUENCE / BITSTRING
|
|
if ((data [1].Tag == 0x30) && (data [2].Tag == 0x03))
|
|
type = X509ContentType.Cert;
|
|
break;
|
|
case 0x02:
|
|
// INTEGER / SEQUENCE / SEQUENCE
|
|
if ((data [1].Tag == 0x30) && (data [2].Tag == 0x30))
|
|
type = X509ContentType.Pkcs12;
|
|
// note: Pfx == Pkcs12
|
|
break;
|
|
}
|
|
}
|
|
// check for PKCS#7 (count unknown but greater than 0)
|
|
// SEQUENCE / OID (signedData)
|
|
if ((data [0].Tag == 0x06) && data [0].CompareValue (signedData))
|
|
type = X509ContentType.Pkcs7;
|
|
}
|
|
catch (Exception e) {
|
|
string msg = Locale.GetText ("Unable to decode certificate.");
|
|
throw new CryptographicException (msg, e);
|
|
}
|
|
|
|
return type;
|
|
}
|
|
|
|
[MonoTODO ("Detection limited to Cert, Pfx, Pkcs12 and Unknown")]
|
|
public static X509ContentType GetCertContentType (string fileName)
|
|
{
|
|
if (fileName == null)
|
|
throw new ArgumentNullException ("fileName");
|
|
if (fileName.Length == 0)
|
|
throw new ArgumentException ("fileName");
|
|
|
|
byte[] data = File.ReadAllBytes (fileName);
|
|
return GetCertContentType (data);
|
|
}
|
|
|
|
// internal stuff because X509Certificate2 isn't complete enough
|
|
// (maybe X509Certificate3 will be better?)
|
|
|
|
internal MX.X509Certificate MonoCertificate {
|
|
get { return _cert; }
|
|
}
|
|
|
|
#else
|
|
// HACK - this ensure the type X509Certificate2 and PrivateKey property exists in the build before
|
|
// Mono.Security.dll is built. This is required to get working client certificate in SSL/TLS
|
|
public AsymmetricAlgorithm PrivateKey {
|
|
get { return null; }
|
|
}
|
|
#endif
|
|
}
|
|
}
|