//
// System.Net.ServicePointManager
//
-// Author:
+// Authors:
// Lawrence Pit (loz@cable.a2000.nl)
+// Gonzalo Paniagua Javier (gonzalo@novell.com)
+//
+// Copyright (c) 2003-2010 Novell, Inc (http://www.novell.com)
//
//
using System.Security.Cryptography.X509Certificates;
#if NET_2_0
+using System.Globalization;
using System.Net.Security;
+#if SECURITY_DEP
+using System.Text.RegularExpressions;
+using Mono.Security;
+using Mono.Security.Cryptography;
+using Mono.Security.X509.Extensions;
+using Mono.Security.Protocol.Tls;
+using MSX = Mono.Security.X509;
+#endif
#endif
//
namespace System.Net
{
- public class ServicePointManager
- {
+#if MOONLIGHT
+ internal class ServicePointManager {
+#else
+ public class ServicePointManager {
+#endif
class SPKey {
Uri uri; // schema/host/port
bool use_connect;
#endif
static bool useNagle;
#endif
+#if NET_2_0
+ static RemoteCertificateValidationCallback server_cert_cb;
+#endif
// Fields
public const int DefaultNonPersistentConnectionLimit = 4;
public const int DefaultPersistentConnectionLimit = 2;
+#if !NET_2_1
const string configKey = "system.net/connectionManagement";
static ConnectionManagementData manager;
+#endif
static ServicePointManager ()
{
+#if !NET_2_1
#if NET_2_0 && CONFIGURATION_DEP
object cfg = ConfigurationManager.GetSection (configKey);
ConnectionManagementSection s = cfg as ConnectionManagementSection;
if (manager != null) {
defaultConnectionLimit = (int) manager.GetMaxConnections ("*");
}
+#endif
}
// Constructors
// Properties
#if NET_2_0
- [Obsolete ("Use ServerCertificateValidationCallback instead",
- false)]
+ [Obsolete ("Use ServerCertificateValidationCallback instead", false)]
#endif
public static ICertificatePolicy CertificatePolicy {
get { return policy; }
set { _securityProtocol = value; }
}
-#if NET_2_0 && SECURITY_DEP
- [MonoTODO]
+#if NET_2_0
public static RemoteCertificateValidationCallback ServerCertificateValidationCallback
{
get {
- throw GetMustImplement ();
+ return server_cert_cb;
}
set {
- throw GetMustImplement ();
+ server_cert_cb = value;
}
}
#endif
throw new InvalidOperationException ("maximum number of service points reached");
string addr = address.ToString ();
+#if NET_2_1
+ int limit = defaultConnectionLimit;
+#else
int limit = (int) manager.GetMaxConnections (addr);
+#endif
sp = new ServicePoint (address, limit, maxServicePointIdleTime);
#if NET_1_1
sp.Expect100Continue = expectContinue;
servicePoints.Remove (list.GetByIndex (i));
}
}
+#if NET_2_0 && SECURITY_DEP
+ internal class ChainValidationHelper {
+ object sender;
+ string host;
+ static bool is_macosx = System.IO.File.Exists (MSX.OSX509Certificates.SecurityLibrary);
+
+ public ChainValidationHelper (object sender)
+ {
+ this.sender = sender;
+ }
+
+ public string Host {
+ get {
+ if (host == null && sender is HttpWebRequest)
+ host = ((HttpWebRequest) sender).Address.Host;
+ return host;
+ }
+
+ set { host = value; }
+ }
+
+ // Used when the obsolete ICertificatePolicy is set to DefaultCertificatePolicy
+ // and the new ServerCertificateValidationCallback is not null
+ internal ValidationResult ValidateChain (Mono.Security.X509.X509CertificateCollection certs)
+ {
+ // user_denied is true if the user callback is called and returns false
+ bool user_denied = false;
+ if (certs == null || certs.Count == 0)
+ return null;
+
+ ICertificatePolicy policy = ServicePointManager.CertificatePolicy;
+ RemoteCertificateValidationCallback cb = ServicePointManager.ServerCertificateValidationCallback;
+
+ X509Chain chain = new X509Chain ();
+ chain.ChainPolicy = new X509ChainPolicy ();
+ for (int i = 1; i < certs.Count; i++) {
+ X509Certificate2 c2 = new X509Certificate2 (certs [i].RawData);
+ chain.ChainPolicy.ExtraStore.Add (c2);
+ }
+
+ X509Certificate2 leaf = new X509Certificate2 (certs [0].RawData);
+ int status11 = 0; // Error code passed to the obsolete ICertificatePolicy callback
+ SslPolicyErrors errors = 0;
+ if (!chain.Build (leaf))
+ errors |= GetErrorsFromChain (chain);
+ if (!CheckCertificateUsage (leaf)) {
+ errors |= SslPolicyErrors.RemoteCertificateChainErrors;
+ status11 = -2146762490; //CERT_E_PURPOSE 0x800B0106
+ }
+ if (!CheckServerIdentity (leaf, Host)) {
+ errors |= SslPolicyErrors.RemoteCertificateNameMismatch;
+ status11 = -2146762481; // CERT_E_CN_NO_MATCH 0x800B010F
+ }
+
+ bool result = false;
+ // No certificate root found means no mozroots or monotouch
+#if !MONOTOUCH
+ if (is_macosx) {
+#endif
+ // Attempt to use OSX certificates
+ // Ideally we should return the SecTrustResult
+ MSX.OSX509Certificates.SecTrustResult trustResult;
+ try {
+ trustResult = MSX.OSX509Certificates.TrustEvaluateSsl (certs);
+ // We could use the other values of trustResult to pass this extra information
+ // to the .NET 2 callback for values like SecTrustResult.Confirm
+ result = (trustResult == MSX.OSX509Certificates.SecTrustResult.Proceed ||
+ trustResult == MSX.OSX509Certificates.SecTrustResult.Unspecified);
+
+ } catch {
+ // Ignore
+ }
+ // Clear error status if the OS told us to trust the certificate
+ if (result) {
+ status11 = 0;
+ errors = 0;
+ }
+#if !MONOTOUCH
+ }
+#endif
+
+ if (policy != null && (!(policy is DefaultCertificatePolicy) || cb == null)) {
+ ServicePoint sp = null;
+ HttpWebRequest req = sender as HttpWebRequest;
+ if (req != null)
+ sp = req.ServicePoint;
+ if (status11 == 0 && errors != 0)
+ status11 = GetStatusFromChain (chain);
+
+ // pre 2.0 callback
+ result = policy.CheckValidationResult (sp, leaf, req, status11);
+ user_denied = !result && !(policy is DefaultCertificatePolicy);
+ }
+ // If there's a 2.0 callback, it takes precedence
+ if (cb != null) {
+ result = cb (sender, leaf, chain, errors);
+ user_denied = !result;
+ }
+ return new ValidationResult (result, user_denied, status11);
+ }
+
+ static int GetStatusFromChain (X509Chain chain)
+ {
+ long result = 0;
+ foreach (var status in chain.ChainStatus) {
+ X509ChainStatusFlags flags = status.Status;
+ if (flags == X509ChainStatusFlags.NoError)
+ continue;
+
+ // CERT_E_EXPIRED
+ if ((flags & X509ChainStatusFlags.NotTimeValid) != 0) result = 0x800B0101;
+ // CERT_E_VALIDITYPERIODNESTING
+ else if ((flags & X509ChainStatusFlags.NotTimeNested) != 0) result = 0x800B0102;
+ // CERT_E_REVOKED
+ else if ((flags & X509ChainStatusFlags.Revoked) != 0) result = 0x800B010C;
+ // TRUST_E_CERT_SIGNATURE
+ else if ((flags & X509ChainStatusFlags.NotSignatureValid) != 0) result = 0x80096004;
+ // CERT_E_WRONG_USAGE
+ else if ((flags & X509ChainStatusFlags.NotValidForUsage) != 0) result = 0x800B0110;
+ // CERT_E_UNTRUSTEDROOT
+ else if ((flags & X509ChainStatusFlags.UntrustedRoot) != 0) result = 0x800B0109;
+ // CRYPT_E_NO_REVOCATION_CHECK
+ else if ((flags & X509ChainStatusFlags.RevocationStatusUnknown) != 0) result = 0x80092012;
+ // CERT_E_CHAINING
+ else if ((flags & X509ChainStatusFlags.Cyclic) != 0) result = 0x800B010A;
+ // TRUST_E_FAIL - generic
+ else if ((flags & X509ChainStatusFlags.InvalidExtension) != 0) result = 0x800B010B;
+ // CERT_E_UNTRUSTEDROOT
+ else if ((flags & X509ChainStatusFlags.InvalidPolicyConstraints) != 0) result = 0x800B010D;
+ // TRUST_E_BASIC_CONSTRAINTS
+ else if ((flags & X509ChainStatusFlags.InvalidBasicConstraints) != 0) result = 0x80096019;
+ // CERT_E_INVALID_NAME
+ else if ((flags & X509ChainStatusFlags.InvalidNameConstraints) != 0) result = 0x800B0114;
+ // CERT_E_INVALID_NAME
+ else if ((flags & X509ChainStatusFlags.HasNotSupportedNameConstraint) != 0) result = 0x800B0114;
+ // CERT_E_INVALID_NAME
+ else if ((flags & X509ChainStatusFlags.HasNotDefinedNameConstraint) != 0) result = 0x800B0114;
+ // CERT_E_INVALID_NAME
+ else if ((flags & X509ChainStatusFlags.HasNotPermittedNameConstraint) != 0) result = 0x800B0114;
+ // CERT_E_INVALID_NAME
+ else if ((flags & X509ChainStatusFlags.HasExcludedNameConstraint) != 0) result = 0x800B0114;
+ // CERT_E_CHAINING
+ else if ((flags & X509ChainStatusFlags.PartialChain) != 0) result = 0x800B010A;
+ // CERT_E_EXPIRED
+ else if ((flags & X509ChainStatusFlags.CtlNotTimeValid) != 0) result = 0x800B0101;
+ // TRUST_E_CERT_SIGNATURE
+ else if ((flags & X509ChainStatusFlags.CtlNotSignatureValid) != 0) result = 0x80096004;
+ // CERT_E_WRONG_USAGE
+ else if ((flags & X509ChainStatusFlags.CtlNotValidForUsage) != 0) result = 0x800B0110;
+ // CRYPT_E_NO_REVOCATION_CHECK
+ else if ((flags & X509ChainStatusFlags.OfflineRevocation) != 0) result = 0x80092012;
+ // CERT_E_ISSUERCHAINING
+ else if ((flags & X509ChainStatusFlags.NoIssuanceChainPolicy) != 0) result = 0x800B0107;
+ else result = 0x800B010B; // TRUST_E_FAIL - generic
+
+ break; // Exit the loop on the first error
+ }
+ return (int) result;
+ }
+
+ static SslPolicyErrors GetErrorsFromChain (X509Chain chain)
+ {
+ SslPolicyErrors errors = SslPolicyErrors.None;
+ foreach (var status in chain.ChainStatus) {
+ if (status.Status == X509ChainStatusFlags.NoError)
+ continue;
+ errors |= SslPolicyErrors.RemoteCertificateChainErrors;
+ break;
+ }
+ return errors;
+ }
+
+ static X509KeyUsageFlags s_flags = X509KeyUsageFlags.DigitalSignature |
+ X509KeyUsageFlags.KeyAgreement |
+ X509KeyUsageFlags.KeyEncipherment;
+ // Adapted to System 2.0+ from TlsServerCertificate.cs
+ //------------------------------
+ // Note: this method only works for RSA certificates
+ // DH certificates requires some changes - does anyone use one ?
+ static bool CheckCertificateUsage (X509Certificate2 cert)
+ {
+ // certificate extensions are required for this
+ // we "must" accept older certificates without proofs
+ if (cert.Version < 3)
+ return true;
+
+ X509KeyUsageExtension kux = (X509KeyUsageExtension) cert.Extensions ["2.5.29.15"];
+ X509EnhancedKeyUsageExtension eku = (X509EnhancedKeyUsageExtension) cert.Extensions ["2.5.29.37"];
+ if (kux != null && eku != null) {
+ // RFC3280 states that when both KeyUsageExtension and
+ // ExtendedKeyUsageExtension are present then BOTH should
+ // be valid
+ if ((kux.KeyUsages & s_flags) == 0)
+ return false;
+ return eku.EnhancedKeyUsages ["1.3.6.1.5.5.7.3.1"] != null ||
+ eku.EnhancedKeyUsages ["2.16.840.1.113730.4.1"] != null;
+ } else if (kux != null) {
+ return ((kux.KeyUsages & s_flags) != 0);
+ } else if (eku != null) {
+ // Server Authentication (1.3.6.1.5.5.7.3.1) or
+ // Netscape Server Gated Crypto (2.16.840.1.113730.4)
+ return eku.EnhancedKeyUsages ["1.3.6.1.5.5.7.3.1"] != null ||
+ eku.EnhancedKeyUsages ["2.16.840.1.113730.4.1"] != null;
+ }
+
+ // last chance - try with older (deprecated) Netscape extensions
+ X509Extension ext = cert.Extensions ["2.16.840.1.113730.1.1"];
+ if (ext != null) {
+ string text = ext.NetscapeCertType (false);
+ return text.IndexOf ("SSL Server Authentication") != -1;
+ }
+ return true;
+ }
+
+ // RFC2818 - HTTP Over TLS, Section 3.1
+ // http://www.ietf.org/rfc/rfc2818.txt
+ //
+ // 1. if present MUST use subjectAltName dNSName as identity
+ // 1.1. if multiples entries a match of any one is acceptable
+ // 1.2. wildcard * is acceptable
+ // 2. URI may be an IP address -> subjectAltName.iPAddress
+ // 2.1. exact match is required
+ // 3. Use of the most specific Common Name (CN=) in the Subject
+ // 3.1 Existing practice but DEPRECATED
+ static bool CheckServerIdentity (X509Certificate2 cert, string targetHost)
+ {
+ X509Extension ext = cert.Extensions ["2.5.29.17"];
+ // 1. subjectAltName
+ if (ext != null) {
+ ASN1 asn = new ASN1 (ext.RawData);
+ SubjectAltNameExtension subjectAltName = new SubjectAltNameExtension (asn);
+ // 1.1 - multiple dNSName
+ foreach (string dns in subjectAltName.DNSNames) {
+ // 1.2 TODO - wildcard support
+ if (Match (targetHost, dns))
+ return true;
+ }
+ // 2. ipAddress
+ foreach (string ip in subjectAltName.IPAddresses) {
+ // 2.1. Exact match required
+ if (ip == targetHost)
+ return true;
+ }
+ }
+ // 3. Common Name (CN=)
+ return CheckDomainName (cert.SubjectName.Format (false), targetHost);
+ }
+
+ static bool CheckDomainName (string subjectName, string targetHost)
+ {
+ string domainName = String.Empty;
+ Regex search = new Regex(@"CN\s*=\s*([^,]*)");
+ MatchCollection elements = search.Matches(subjectName);
+ if (elements.Count == 1) {
+ if (elements[0].Success)
+ domainName = elements[0].Groups[1].Value.ToString();
+ }
+
+ return Match (targetHost, domainName);
+ }
+
+ // ensure the pattern is valid wrt to RFC2595 and RFC2818
+ // http://www.ietf.org/rfc/rfc2595.txt
+ // http://www.ietf.org/rfc/rfc2818.txt
+ static bool Match (string hostname, string pattern)
+ {
+ // check if this is a pattern
+ int index = pattern.IndexOf ('*');
+ if (index == -1) {
+ // not a pattern, do a direct case-insensitive comparison
+ return (String.Compare (hostname, pattern, true, CultureInfo.InvariantCulture) == 0);
+ }
+
+ // check pattern validity
+ // A "*" wildcard character MAY be used as the left-most name component in the certificate.
+
+ // unless this is the last char (valid)
+ if (index != pattern.Length - 1) {
+ // then the next char must be a dot .'.
+ if (pattern [index + 1] != '.')
+ return false;
+ }
+
+ // only one (A) wildcard is supported
+ int i2 = pattern.IndexOf ('*', index + 1);
+ if (i2 != -1)
+ return false;
+
+ // match the end of the pattern
+ string end = pattern.Substring (index + 1);
+ int length = hostname.Length - end.Length;
+ // no point to check a pattern that is longer than the hostname
+ if (length <= 0)
+ return false;
+
+ if (String.Compare (hostname, length, end, 0, end.Length, true, CultureInfo.InvariantCulture) != 0)
+ return false;
+
+ // special case, we start with the wildcard
+ if (index == 0) {
+ // ensure we hostname non-matched part (start) doesn't contain a dot
+ int i3 = hostname.IndexOf ('.');
+ return ((i3 == -1) || (i3 >= (hostname.Length - end.Length)));
+ }
+
+ // match the start of the pattern
+ string start = pattern.Substring (0, index);
+ return (String.Compare (hostname, 0, start, 0, start.Length, true, CultureInfo.InvariantCulture) == 0);
+ }
+ }
+#endif
}
}
+
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