internal static void CacheCredential(SafeFreeCredentials newHandle)
{
try {
SafeCredentialReference newRef = SafeCredentialReference.CreateReference(newHandle);
if (newRef == null)
{
return;
}
unchecked
{
int index = Interlocked.Increment(ref _Current) & c_MaxCacheSize;
newRef = Interlocked.Exchange <SafeCredentialReference>(ref _CacheSlots[index], newRef);
}
if (newRef != null)
{
newRef.Close();
}
}
catch (Exception e) {
if (!NclUtilities.IsFatal(e))
{
GlobalLog.Assert("SSPIHandlCache", "Attempted to throw: " + e.ToString());
}
}
}
internal static void CacheCredential(SafeFreeCredentials newHandle)
{
try
{
SafeCredentialReference newRef = SafeCredentialReference.CreateReference(newHandle);
if (newRef == null)
{
return;
}
unchecked
{
int index = Interlocked.Increment(ref s_current) & c_MaxCacheSize;
newRef = Interlocked.Exchange <SafeCredentialReference>(ref s_cacheSlots[index], newRef);
}
newRef?.Dispose();
}
catch (Exception e)
{
if (!ExceptionCheck.IsFatal(e))
{
if (NetEventSource.IsEnabled)
{
NetEventSource.Fail(null, $"Attempted to throw: {e}");
}
}
}
}
internal static void CacheCredential(SafeFreeCredentials newHandle)
{
try
{
SafeCredentialReference?newRef = SafeCredentialReference.CreateReference(newHandle);
if (newRef == null)
{
return;
}
int index = Interlocked.Increment(ref s_current) & c_MaxCacheSize;
#pragma warning disable CS8601 // Possible null reference assignment.
newRef = Interlocked.Exchange <SafeCredentialReference>(ref s_cacheSlots[index], newRef);
#pragma warning restore CS8601 // Possible null reference assignment.
newRef?.Dispose();
}
catch (Exception e)
{
if (NetEventSource.Log.IsEnabled() && !ExceptionCheck.IsFatal(e))
{
NetEventSource.Error(null, $"Attempted to throw: {e}");
}
}
}
//
// Returns null or previously cached cred handle.
//
// ATTN: The returned handle can be invalid, the callers of InitializeSecurityContext and AcceptSecurityContext
// must be prepared to execute a back-out code if the call fails.
//
internal static SafeFreeCredentials TryCachedCredential(byte[] thumbPrint, SslProtocols sslProtocols, bool isServer, EncryptionPolicy encryptionPolicy)
{
if (s_CachedCreds.Count == 0)
{
if (GlobalLog.IsEnabled)
{
GlobalLog.Print("TryCachedCredential() Not found, Current Cache Count = " + s_CachedCreds.Count);
}
return(null);
}
object key = new SslCredKey(thumbPrint, (int)sslProtocols, isServer, encryptionPolicy);
SafeCredentialReference cached = s_CachedCreds[key] as SafeCredentialReference;
if (cached == null || cached.IsClosed || cached.Target.IsInvalid)
{
if (GlobalLog.IsEnabled)
{
GlobalLog.Print("TryCachedCredential() Not found or invalid, Current Cache Count = " + s_CachedCreds.Count);
}
return(null);
}
if (GlobalLog.IsEnabled)
{
GlobalLog.Print("TryCachedCredential() Found a cached Handle = " + cached.Target.ToString());
}
return(cached.Target);
}
//
// The app is calling this method after starting an SSL handshake.
//
// ATTN: The thumbPrint must be from inspected and possibly cloned user Cert object or we get a security hole in SslCredKey ctor.
//
internal static void CacheCredential(SafeFreeCredentials creds, byte[]?thumbPrint, SslProtocols sslProtocols, bool isServer, EncryptionPolicy encryptionPolicy, bool sendTrustList = false)
{
Debug.Assert(creds != null, "creds == null");
if (creds.IsInvalid)
{
if (NetEventSource.Log.IsEnabled())
{
NetEventSource.Info(null, $"Refused to cache an Invalid Handle {creds}, Current Cache Count = {s_cachedCreds.Count}");
}
return;
}
SslCredKey key = new SslCredKey(thumbPrint, (int)sslProtocols, isServer, encryptionPolicy, sendTrustList);
SafeFreeCredentials?credentials = GetCachedCredential(key);
DateTime utcNow = DateTime.UtcNow;
if (credentials == null || credentials.IsClosed || credentials.IsInvalid || credentials.Expiry < utcNow)
{
lock (s_cachedCreds)
{
credentials = GetCachedCredential(key);
if (credentials == null || credentials.IsClosed || credentials.IsInvalid || credentials.Expiry < utcNow)
{
SafeCredentialReference?cached = SafeCredentialReference.CreateReference(creds);
if (cached == null)
{
// Means the handle got closed in between, return it back and let caller deal with the issue.
return;
}
s_cachedCreds[key] = cached;
if (NetEventSource.Log.IsEnabled())
{
NetEventSource.Info(null, $"Caching New Handle = {creds}, Current Cache Count = {s_cachedCreds.Count}");
}
ShrinkCredentialCache();
}
else
{
if (NetEventSource.Log.IsEnabled())
{
NetEventSource.Info(null, $"CacheCredential() (locked retry) Found already cached Handle = {credentials}");
}
}
}
}
else
{
if (NetEventSource.Log.IsEnabled())
{
NetEventSource.Info(null, $"CacheCredential() Ignoring incoming handle = {creds} since found already cached Handle = {credentials}");
}
}
internal static SafeCredentialReference CreateReference(SafeFreeCredentials target)
{
SafeCredentialReference result = new SafeCredentialReference(target);
if (result.IsInvalid)
{
return null;
}
return result;
}
internal static SafeCredentialReference CreateReference(SafeFreeCredentials target)
{
SafeCredentialReference result = new SafeCredentialReference(target);
if (result.IsInvalid)
{
return null;
}
return result;
}
internal static SafeFreeCredentials TryCachedCredential(byte[] thumbPrint, SchProtocols allowedProtocols, EncryptionPolicy encryptionPolicy)
{
if (s_CachedCreds.Count != 0)
{
object obj2 = new SslCredKey(thumbPrint, allowedProtocols, encryptionPolicy);
SafeCredentialReference reference = s_CachedCreds[obj2] as SafeCredentialReference;
if (((reference != null) && !reference.IsClosed) && !reference._Target.IsInvalid)
{
return(reference._Target);
}
}
return(null);
}
internal static void CacheCredential(SafeFreeCredentials creds, byte[] thumbPrint, SchProtocols allowedProtocols, EncryptionPolicy encryptionPolicy)
{
if (!creds.IsInvalid)
{
object obj2 = new SslCredKey(thumbPrint, allowedProtocols, encryptionPolicy);
SafeCredentialReference reference = s_CachedCreds[obj2] as SafeCredentialReference;
if (((reference == null) || reference.IsClosed) || reference._Target.IsInvalid)
{
lock (s_CachedCreds)
{
reference = s_CachedCreds[obj2] as SafeCredentialReference;
if ((reference == null) || reference.IsClosed)
{
reference = SafeCredentialReference.CreateReference(creds);
if (reference != null)
{
s_CachedCreds[obj2] = reference;
if ((s_CachedCreds.Count % 0x20) == 0)
{
DictionaryEntry[] array = new DictionaryEntry[s_CachedCreds.Count];
s_CachedCreds.CopyTo(array, 0);
for (int i = 0; i < array.Length; i++)
{
reference = array[i].Value as SafeCredentialReference;
if (reference != null)
{
creds = reference._Target;
reference.Close();
if ((!creds.IsClosed && !creds.IsInvalid) && ((reference = SafeCredentialReference.CreateReference(creds)) != null))
{
s_CachedCreds[array[i].Key] = reference;
}
else
{
s_CachedCreds.Remove(array[i].Key);
}
}
}
}
}
}
}
}
}
}
static void ShrinkCredentialCache()
{
//
// A simplest way of preventing infinite cache grows.
//
// Security relief (DoS):
// A number of active creds is never greater than a number of _outstanding_
// security sessions, i.e. SSL connections.
// So we will try to shrink cache to the number of active creds once in a while.
//
// We won't shrink cache in the case when NO new handles are coming to it.
//
if ((s_cachedCreds.Count % CheckExpiredModulo) == 0)
{
KeyValuePair <SslCredKey, SafeCredentialReference>[] toRemoveAttempt = s_cachedCreds.ToArray();
for (int i = 0; i < toRemoveAttempt.Length; ++i)
{
SafeCredentialReference?cahced = toRemoveAttempt[i].Value;
SafeFreeCredentials? creds = cahced.Target;
if (creds == null)
{
s_cachedCreds.TryRemove(toRemoveAttempt[i].Key, out _);
continue;
}
cahced.Dispose();
cahced = SafeCredentialReference.CreateReference(creds);
if (cahced != null)
{
s_cachedCreds[toRemoveAttempt[i].Key] = cahced;
}
else
{
s_cachedCreds.TryRemove(toRemoveAttempt[i].Key, out _);
}
}
if (NetEventSource.Log.IsEnabled())
{
NetEventSource.Info(null, $"Scavenged cache, New Cache Count = {s_cachedCreds.Count}");
}
}
}
internal static void CacheCredential(SafeFreeCredentials newHandle)
{
try
{
SafeCredentialReference reference = SafeCredentialReference.CreateReference(newHandle);
if (reference != null)
{
int index = Interlocked.Increment(ref _Current) & 0x1f;
reference = Interlocked.Exchange <SafeCredentialReference>(ref _CacheSlots[index], reference);
if (reference != null)
{
reference.Close();
}
}
}
catch (Exception exception)
{
NclUtilities.IsFatal(exception);
}
}
//
// Returns null or previously cached cred handle
//
// ATTN: The returned handle can be invalid, the callers of InitializeSecurityContext and AcceptSecurityContext
// must be prepared to execute a backout code if the call fails.
//
// Note:thumbPrint is a cryptographicaly strong hash of a certificate
//
internal static SafeFreeCredentials TryCachedCredential(byte[] thumbPrint, SchProtocols allowedProtocols, EncryptionPolicy encryptionPolicy)
{
if (s_CachedCreds.Count == 0)
{
GlobalLog.Print("TryCachedCredential() Not Found, Current Cache Count = " + s_CachedCreds.Count);
return(null);
}
object key = new SslCredKey(thumbPrint, allowedProtocols, encryptionPolicy);
SafeCredentialReference cached = s_CachedCreds[key] as SafeCredentialReference;
if (cached == null || cached.IsClosed || cached._Target.IsInvalid)
{
GlobalLog.Print("TryCachedCredential() Not Found, Current Cache Count = " + s_CachedCreds.Count);
return(null);
}
GlobalLog.Print("TryCachedCredential() Found a cached Handle = " + cached._Target.ToString());
return(cached._Target);
}
internal static void CacheCredential(SafeFreeCredentials newHandle)
{
try
{
SafeCredentialReference?newRef = SafeCredentialReference.CreateReference(newHandle);
if (newRef == null)
{
return;
}
int index = Interlocked.Increment(ref s_current) & MaxCacheSize;
Interlocked.Exchange(ref s_cacheSlots[index], newRef)?.Dispose();
}
catch (Exception e)
{
if (NetEventSource.Log.IsEnabled() && !ExceptionCheck.IsFatal(e))
{
NetEventSource.Error(null, $"Attempted to throw: {e}");
}
}
}
//
// The app is calling this method after starting an SSL handshake.
//
// ATTN: The thumbPrint must be from inspected and possibly cloned user Cert object or we get a security hole in SslCredKey ctor.
//
internal static void CacheCredential(SafeFreeCredentials creds, byte[]?thumbPrint, SslProtocols sslProtocols, bool isServer, EncryptionPolicy encryptionPolicy)
{
if (creds == null)
{
NetEventSource.Fail(null, "creds == null");
}
if (creds !.IsInvalid)
{
if (NetEventSource.Log.IsEnabled())
{
NetEventSource.Info(null, $"Refused to cache an Invalid Handle {creds}, Current Cache Count = {s_cachedCreds.Count}");
}
return;
}
var key = new SslCredKey(thumbPrint, (int)sslProtocols, isServer, encryptionPolicy);
SafeCredentialReference?cached;
if (!s_cachedCreds.TryGetValue(key, out cached) || cached.IsClosed || cached.Target.IsInvalid)
{
lock (s_cachedCreds)
{
if (!s_cachedCreds.TryGetValue(key, out cached) || cached.IsClosed)
{
cached = SafeCredentialReference.CreateReference(creds);
if (cached == null)
{
// Means the handle got closed in between, return it back and let caller deal with the issue.
return;
}
s_cachedCreds[key] = cached;
if (NetEventSource.Log.IsEnabled())
{
NetEventSource.Info(null, $"Caching New Handle = {creds}, Current Cache Count = {s_cachedCreds.Count}");
}
//
// A simplest way of preventing infinite cache grows.
//
// Security relief (DoS):
// A number of active creds is never greater than a number of _outstanding_
// security sessions, i.e. SSL connections.
// So we will try to shrink cache to the number of active creds once in a while.
//
// We won't shrink cache in the case when NO new handles are coming to it.
//
if ((s_cachedCreds.Count % CheckExpiredModulo) == 0)
{
KeyValuePair <SslCredKey, SafeCredentialReference>[] toRemoveAttempt = s_cachedCreds.ToArray();
for (int i = 0; i < toRemoveAttempt.Length; ++i)
{
cached = toRemoveAttempt[i].Value;
if (cached != null)
{
creds = cached.Target;
cached.Dispose();
if (!creds.IsClosed && !creds.IsInvalid && (cached = SafeCredentialReference.CreateReference(creds)) != null)
{
s_cachedCreds[toRemoveAttempt[i].Key] = cached;
}
else
{
s_cachedCreds.TryRemove(toRemoveAttempt[i].Key, out cached);
}
}
}
if (NetEventSource.Log.IsEnabled())
{
NetEventSource.Info(null, $"Scavenged cache, New Cache Count = {s_cachedCreds.Count}");
}
}
}
else if (NetEventSource.Log.IsEnabled())
{
if (NetEventSource.Log.IsEnabled())
{
NetEventSource.Info(null, $"CacheCredential() (locked retry) Found already cached Handle = {cached.Target}");
}
}
}
}
else if (NetEventSource.Log.IsEnabled())
{
if (NetEventSource.Log.IsEnabled())
{
NetEventSource.Info(null, $"CacheCredential() Ignoring incoming handle = {creds} since found already cached Handle = {cached.Target}");
}
}
}
//
// The app is calling this method after starting an SSL handshake.
//
// ATTN: The thumbPrint must be from inspected and possbly cloned user Cert object or we get a security hole in SslCredKey ctor.
//
internal static void CacheCredential(SafeFreeCredentials creds, byte[] thumbPrint, SchProtocols allowedProtocols, EncryptionPolicy encryptionPolicy)
{
GlobalLog.Assert(creds != null, "CacheCredential|creds == null");
if (creds.IsInvalid)
{
GlobalLog.Print("CacheCredential() Refused to cache an Invalid Handle = " + creds.ToString() + ", Current Cache Count = " + s_CachedCreds.Count);
return;
}
object key = new SslCredKey(thumbPrint, allowedProtocols, encryptionPolicy);
SafeCredentialReference cached = s_CachedCreds[key] as SafeCredentialReference;
if (cached == null || cached.IsClosed || cached._Target.IsInvalid)
{
lock (s_CachedCreds)
{
cached = s_CachedCreds[key] as SafeCredentialReference;
if (cached == null || cached.IsClosed)
{
cached = SafeCredentialReference.CreateReference(creds);
if (cached == null)
{
// Means the handle got closed in between, return it back and let caller deal with the issue.
return;
}
s_CachedCreds[key] = cached;
GlobalLog.Print("CacheCredential() Caching New Handle = " + creds.ToString() + ", Current Cache Count = " + s_CachedCreds.Count);
//
// A simplest way of preventing infinite cache grows.
//
// Security relief (DoS):
// A number of active creds is never greater than a number of _outstanding_
// security sessions, i.e. ssl connections.
// So we will try to shrink cache to the number of active creds once in a while.
//
// Just to make clear we won't shrink cache in the case when NO new handles are coming to it.
//
if ((s_CachedCreds.Count % c_CheckExpiredModulo) == 0)
{
DictionaryEntry[] toRemoveAttempt = new DictionaryEntry[s_CachedCreds.Count];
s_CachedCreds.CopyTo(toRemoveAttempt, 0);
for (int i = 0; i < toRemoveAttempt.Length; ++i)
{
cached = toRemoveAttempt[i].Value as SafeCredentialReference;
if (cached != null)
{
creds = cached._Target;
cached.Close();
if (!creds.IsClosed && !creds.IsInvalid && (cached = SafeCredentialReference.CreateReference(creds)) != null)
{
s_CachedCreds[toRemoveAttempt[i].Key] = cached;
}
else
{
s_CachedCreds.Remove(toRemoveAttempt[i].Key);
}
}
}
GlobalLog.Print("Scavenged cache, New Cache Count = " + s_CachedCreds.Count);
}
}
else
{
GlobalLog.Print("CacheCredential() (locked retry) Found already cached Handle = " + cached._Target.ToString());
}
}
}
else
{
GlobalLog.Print("CacheCredential() Ignoring incoming handle = " + creds.ToString() + " since found already cached Handle = " + cached._Target.ToString());
}
}
