public unsafe Mutex(bool initiallyOwned, String name, out bool createdNew, MutexSecurity mutexSecurity)
{
if(null != name && System.IO.Path.MAX_PATH < name.Length)
{
throw new ArgumentException(Environment.GetResourceString("Argument_WaitHandleNameTooLong",name));
}
Contract.EndContractBlock();
Win32Native.SECURITY_ATTRIBUTES secAttrs = null;
#if !FEATURE_PAL && FEATURE_MACL
// For ACL's, get the security descriptor from the MutexSecurity.
if (mutexSecurity != null) {
secAttrs = new Win32Native.SECURITY_ATTRIBUTES();
secAttrs.nLength = (int)Marshal.SizeOf(secAttrs);
byte[] sd = mutexSecurity.GetSecurityDescriptorBinaryForm();
byte* pSecDescriptor = stackalloc byte[sd.Length];
Buffer.memcpy(sd, 0, pSecDescriptor, 0, sd.Length);
secAttrs.pSecurityDescriptor = pSecDescriptor;
}
#endif
RuntimeHelpers.CleanupCode cleanupCode = new RuntimeHelpers.CleanupCode(MutexCleanupCode);
MutexCleanupInfo cleanupInfo = new MutexCleanupInfo(null, false);
MutexTryCodeHelper tryCodeHelper = new MutexTryCodeHelper(initiallyOwned, cleanupInfo, name, secAttrs, this);
RuntimeHelpers.TryCode tryCode = new RuntimeHelpers.TryCode(tryCodeHelper.MutexTryCode);
RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(
tryCode,
cleanupCode,
cleanupInfo);
createdNew = tryCodeHelper.m_newMutex;
}
public unsafe Mutex(bool initiallyOwned, String name, out bool createdNew, MutexSecurity mutexSecurity)
{
if (name == string.Empty)
{
// Empty name is treated as an unnamed mutex. Set to null, and we will check for null from now on.
name = null;
}
#if !PLATFORM_UNIX
if (name != null && System.IO.Path.MaxPath < name.Length)
{
throw new ArgumentException(Environment.GetResourceString("Argument_WaitHandleNameTooLong", Path.MaxPath), "name");
}
#endif
Contract.EndContractBlock();
Win32Native.SECURITY_ATTRIBUTES secAttrs = null;
#if FEATURE_MACL
// For ACL's, get the security descriptor from the MutexSecurity.
if (mutexSecurity != null) {
secAttrs = new Win32Native.SECURITY_ATTRIBUTES();
secAttrs.nLength = (int)Marshal.SizeOf(secAttrs);
byte[] sd = mutexSecurity.GetSecurityDescriptorBinaryForm();
byte* pSecDescriptor = stackalloc byte[sd.Length];
Buffer.Memcpy(pSecDescriptor, 0, sd, 0, sd.Length);
secAttrs.pSecurityDescriptor = pSecDescriptor;
}
#endif
CreateMutexWithGuaranteedCleanup(initiallyOwned, name, out createdNew, secAttrs);
}
public unsafe Mutex(bool initiallyOwned, String name, out bool createdNew, MutexSecurity mutexSecurity)
{
if (name != null)
{
#if PLATFORM_UNIX
throw new PlatformNotSupportedException(Environment.GetResourceString("PlatformNotSupported_NamedSynchronizationPrimitives"));
#else
if (System.IO.Path.MaxPath < name.Length)
{
throw new ArgumentException(Environment.GetResourceString("Argument_WaitHandleNameTooLong", name));
}
#endif
}
Contract.EndContractBlock();
Win32Native.SECURITY_ATTRIBUTES secAttrs = null;
#if FEATURE_MACL
// For ACL's, get the security descriptor from the MutexSecurity.
if (mutexSecurity != null) {
secAttrs = new Win32Native.SECURITY_ATTRIBUTES();
secAttrs.nLength = (int)Marshal.SizeOf(secAttrs);
byte[] sd = mutexSecurity.GetSecurityDescriptorBinaryForm();
byte* pSecDescriptor = stackalloc byte[sd.Length];
Buffer.Memcpy(pSecDescriptor, 0, sd, 0, sd.Length);
secAttrs.pSecurityDescriptor = pSecDescriptor;
}
#endif
CreateMutexWithGuaranteedCleanup(initiallyOwned, name, out createdNew, secAttrs);
}
public unsafe Mutex(bool initiallyOwned, string name, out bool createdNew, MutexSecurity mutexSecurity)
{
if ((name != null) && (260 < name.Length))
{
throw new ArgumentException(Environment.GetResourceString("Argument_WaitHandleNameTooLong", new object[] { name }));
}
Win32Native.SECURITY_ATTRIBUTES secAttrs = null;
if (mutexSecurity != null)
{
secAttrs = new Win32Native.SECURITY_ATTRIBUTES {
nLength = Marshal.SizeOf(secAttrs)
};
byte[] securityDescriptorBinaryForm = mutexSecurity.GetSecurityDescriptorBinaryForm();
byte* pDest = stackalloc byte[1 * securityDescriptorBinaryForm.Length];
Buffer.memcpy(securityDescriptorBinaryForm, 0, pDest, 0, securityDescriptorBinaryForm.Length);
secAttrs.pSecurityDescriptor = pDest;
}
SafeWaitHandle mutexHandle = null;
bool newMutex = false;
RuntimeHelpers.CleanupCode backoutCode = new RuntimeHelpers.CleanupCode(this.MutexCleanupCode);
MutexCleanupInfo cleanupInfo = new MutexCleanupInfo(mutexHandle, false);
RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(delegate (object userData) {
RuntimeHelpers.PrepareConstrainedRegions();
try
{
}
finally
{
if (initiallyOwned)
{
cleanupInfo.inCriticalRegion = true;
Thread.BeginThreadAffinity();
Thread.BeginCriticalRegion();
}
}
int errorCode = 0;
RuntimeHelpers.PrepareConstrainedRegions();
try
{
}
finally
{
errorCode = CreateMutexHandle(initiallyOwned, name, secAttrs, out mutexHandle);
}
if (mutexHandle.IsInvalid)
{
mutexHandle.SetHandleAsInvalid();
if (((name != null) && (name.Length != 0)) && (6 == errorCode))
{
throw new WaitHandleCannotBeOpenedException(Environment.GetResourceString("Threading.WaitHandleCannotBeOpenedException_InvalidHandle", new object[] { name }));
}
__Error.WinIOError(errorCode, name);
}
newMutex = errorCode != 0xb7;
this.SetHandleInternal(mutexHandle);
this.hasThreadAffinity = true;
}, backoutCode, cleanupInfo);
createdNew = newMutex;
}
public unsafe EventWaitHandle(bool initialState, EventResetMode mode, string name, out bool createdNew, EventWaitHandleSecurity eventSecurity)
{
bool flag;
if ((name != null) && (260 < name.Length))
{
throw new ArgumentException(Environment.GetResourceString("Argument_WaitHandleNameTooLong", new object[] { name }));
}
Win32Native.SECURITY_ATTRIBUTES structure = null;
if (eventSecurity != null)
{
structure = new Win32Native.SECURITY_ATTRIBUTES {
nLength = Marshal.SizeOf(structure)
};
byte[] securityDescriptorBinaryForm = eventSecurity.GetSecurityDescriptorBinaryForm();
byte* pDest = stackalloc byte[1 * securityDescriptorBinaryForm.Length];
Buffer.memcpy(securityDescriptorBinaryForm, 0, pDest, 0, securityDescriptorBinaryForm.Length);
structure.pSecurityDescriptor = pDest;
}
SafeWaitHandle handle = null;
switch (mode)
{
case EventResetMode.AutoReset:
flag = false;
break;
case EventResetMode.ManualReset:
flag = true;
break;
default:
throw new ArgumentException(Environment.GetResourceString("Argument_InvalidFlag", new object[] { name }));
}
handle = Win32Native.CreateEvent(structure, flag, initialState, name);
int errorCode = Marshal.GetLastWin32Error();
if (handle.IsInvalid)
{
handle.SetHandleAsInvalid();
if (((name != null) && (name.Length != 0)) && (6 == errorCode))
{
throw new WaitHandleCannotBeOpenedException(Environment.GetResourceString("Threading.WaitHandleCannotBeOpenedException_InvalidHandle", new object[] { name }));
}
__Error.WinIOError(errorCode, name);
}
createdNew = errorCode != 0xb7;
base.SetHandleInternal(handle);
}
public unsafe Mutex(bool initiallyOwned, string name, out bool createdNew, MutexSecurity mutexSecurity)
{
if ((name != null) && (260 < name.Length))
{
throw new ArgumentException(Environment.GetResourceString("Argument_WaitHandleNameTooLong", new object[] { name }));
}
Win32Native.SECURITY_ATTRIBUTES structure = null;
if (mutexSecurity != null)
{
structure = new Win32Native.SECURITY_ATTRIBUTES {
nLength = Marshal.SizeOf(structure)
};
byte[] securityDescriptorBinaryForm = mutexSecurity.GetSecurityDescriptorBinaryForm();
byte* pDest = stackalloc byte[(IntPtr) securityDescriptorBinaryForm.Length];
Buffer.memcpy(securityDescriptorBinaryForm, 0, pDest, 0, securityDescriptorBinaryForm.Length);
structure.pSecurityDescriptor = pDest;
}
RuntimeHelpers.CleanupCode backoutCode = new RuntimeHelpers.CleanupCode(this.MutexCleanupCode);
MutexCleanupInfo cleanupInfo = new MutexCleanupInfo(null, false);
MutexTryCodeHelper helper = new MutexTryCodeHelper(initiallyOwned, cleanupInfo, name, structure, this);
RuntimeHelpers.TryCode code = new RuntimeHelpers.TryCode(helper.MutexTryCode);
RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(code, backoutCode, cleanupInfo);
createdNew = helper.m_newMutex;
}
private unsafe RegistryKey CreateSubKeyInternal(String subkey, RegistryKeyPermissionCheck permissionCheck, object registrySecurityObj, RegistryOptions registryOptions)
{
ValidateKeyOptions(registryOptions);
ValidateKeyName(subkey);
ValidateKeyMode(permissionCheck);
EnsureWriteable();
subkey = FixupName(subkey); // Fixup multiple slashes to a single slash
// only keys opened under read mode is not writable
if (!remoteKey) {
RegistryKey key = InternalOpenSubKey(subkey, (permissionCheck != RegistryKeyPermissionCheck.ReadSubTree));
if (key != null) { // Key already exits
CheckPermission(RegistryInternalCheck.CheckSubKeyWritePermission, subkey, false, RegistryKeyPermissionCheck.Default);
CheckPermission(RegistryInternalCheck.CheckSubTreePermission, subkey, false, permissionCheck);
key.checkMode = permissionCheck;
return key;
}
}
CheckPermission(RegistryInternalCheck.CheckSubKeyCreatePermission, subkey, false, RegistryKeyPermissionCheck.Default);
Win32Native.SECURITY_ATTRIBUTES secAttrs = null;
#if FEATURE_MACL
RegistrySecurity registrySecurity = (RegistrySecurity)registrySecurityObj;
// For ACL's, get the security descriptor from the RegistrySecurity.
if (registrySecurity != null) {
secAttrs = new Win32Native.SECURITY_ATTRIBUTES();
secAttrs.nLength = (int)Marshal.SizeOf(secAttrs);
byte[] sd = registrySecurity.GetSecurityDescriptorBinaryForm();
// We allocate memory on the stack to improve the speed.
// So this part of code can't be refactored into a method.
byte* pSecDescriptor = stackalloc byte[sd.Length];
Buffer.Memcpy(pSecDescriptor, 0, sd, 0, sd.Length);
secAttrs.pSecurityDescriptor = pSecDescriptor;
}
#endif
int disposition = 0;
// By default, the new key will be writable.
SafeRegistryHandle result = null;
int ret = Win32Native.RegCreateKeyEx(hkey,
subkey,
0,
null,
(int)registryOptions /* specifies if the key is volatile */,
GetRegistryKeyAccess(permissionCheck != RegistryKeyPermissionCheck.ReadSubTree) | (int)regView,
secAttrs,
out result,
out disposition);
if (ret == 0 && !result.IsInvalid) {
RegistryKey key = new RegistryKey(result, (permissionCheck != RegistryKeyPermissionCheck.ReadSubTree), false, remoteKey, false, regView);
CheckPermission(RegistryInternalCheck.CheckSubTreePermission, subkey, false, permissionCheck);
key.checkMode = permissionCheck;
if (subkey.Length == 0)
key.keyName = keyName;
else
key.keyName = keyName + "\\" + subkey;
return key;
}
else if (ret != 0) // syscall failed, ret is an error code.
Win32Error(ret, keyName + "\\" + subkey); // Access denied?
BCLDebug.Assert(false, "Unexpected code path in RegistryKey::CreateSubKey");
return null;
}
private static unsafe Win32Native.SECURITY_ATTRIBUTES GetSecAttrs(FileShare share, FileSecurity fileSecurity, out object pinningHandle)
{
pinningHandle = null;
Win32Native.SECURITY_ATTRIBUTES structure = null;
if (((share & FileShare.Inheritable) != FileShare.None) || (fileSecurity != null))
{
structure = new Win32Native.SECURITY_ATTRIBUTES {
nLength = Marshal.SizeOf(structure)
};
if ((share & FileShare.Inheritable) != FileShare.None)
{
structure.bInheritHandle = 1;
}
if (fileSecurity == null)
{
return structure;
}
byte[] securityDescriptorBinaryForm = fileSecurity.GetSecurityDescriptorBinaryForm();
pinningHandle = GCHandle.Alloc(securityDescriptorBinaryForm, GCHandleType.Pinned);
fixed (byte* numRef = securityDescriptorBinaryForm)
{
structure.pSecurityDescriptor = numRef;
}
}
return structure;
}
private static Win32Native.SECURITY_ATTRIBUTES GetSecAttrs(FileShare share)
{
Win32Native.SECURITY_ATTRIBUTES structure = null;
if ((share & FileShare.Inheritable) != FileShare.None)
{
structure = new Win32Native.SECURITY_ATTRIBUTES {
nLength = Marshal.SizeOf(structure),
bInheritHandle = 1
};
}
return structure;
}
internal static unsafe void AcquireReservedMutex(ref bool bHandleObtained)
{
#if FEATURE_MACL
SafeWaitHandle mutexHandle = null;
int errorCode;
bHandleObtained = false;
if (!Environment.IsW2k3) {
return;
}
if (s_ReservedMutex == null) {
// Create a maximally-permissive security descriptor, to ensure we never get an
// ACCESS_DENIED error when calling CreateMutex
MutexSecurity sec = new MutexSecurity();
SecurityIdentifier everyoneSid = new SecurityIdentifier(WellKnownSidType.WorldSid, null);
sec.AddAccessRule(new MutexAccessRule(everyoneSid, MutexRights.FullControl, AccessControlType.Allow));
// For ACL's, get the security descriptor from the MutexSecurity.
Win32Native.SECURITY_ATTRIBUTES secAttrs = new Win32Native.SECURITY_ATTRIBUTES();
secAttrs.nLength = (int)Marshal.SizeOf(secAttrs);
byte[] sd = sec.GetSecurityDescriptorBinaryForm();
byte * bytesOnStack = stackalloc byte[sd.Length];
Buffer.Memcpy(bytesOnStack, 0, sd, 0, sd.Length);
secAttrs.pSecurityDescriptor = bytesOnStack;
RuntimeHelpers.PrepareConstrainedRegions();
try {}
finally {
mutexHandle = Win32Native.CreateMutex(secAttrs, false, c_ReservedMutexName);
// need to set specially, since this mutex cannot lock on itself while closing itself.
mutexHandle.SetAsReservedMutex();
}
errorCode = Marshal.GetLastWin32Error();
if (mutexHandle.IsInvalid) {
mutexHandle.SetHandleAsInvalid();
__Error.WinIOError(errorCode, c_ReservedMutexName);
}
Mutex m = new Mutex(mutexHandle);
Interlocked.CompareExchange(ref s_ReservedMutex, m, null);
}
RuntimeHelpers.PrepareConstrainedRegions();
try { }
finally {
try {
s_ReservedMutex.WaitOne();
bHandleObtained = true;
}
catch (AbandonedMutexException)
{
// we don't care if another process holding the Mutex was killed
bHandleObtained = true;
}
}
#else
bHandleObtained = true;
#endif
}
private static unsafe Mutex GetMutexWithAcl(string mutexName) {
// We need to set at a DACL on the Mutex we're going to create to allow it to be shared.
// The DACL here grants MUTEX_ALL_ACCESS (0x001F0001) to the current user. This allows hosts
// like sllaucher.exe which strip the admin sections of the current user token to access the
// Mutex.
IntPtr byteArray = IntPtr.Zero;
uint byteArraySize = 0;
try {
if (Win32Native.ConvertStringSdToSd(String.Format(CultureInfo.InvariantCulture, "D:(A;;0x001F0001;;;{0})", GetCurrentSIDAsString()), 1 /*SDDL_REVISION_1*/, out byteArray, ref byteArraySize) == 0) {
Marshal.ThrowExceptionForHR(Marshal.GetHRForLastWin32Error(), new IntPtr(-1));
}
Win32Native.SECURITY_ATTRIBUTES secAttrs = new Win32Native.SECURITY_ATTRIBUTES();
secAttrs.nLength = (int)Marshal.SizeOf(secAttrs);
// The Win32 function ConvertStringSecurityDescriptorToSecurityDescriptor allocated the buffer pointed to by byteArray
// it isn't tracked by the GC so we don't need to pin it.
secAttrs.pSecurityDescriptor = (byte*)byteArray.ToPointer();
bool createdNew; /* not used */
return new Mutex(false, mutexName, out createdNew, secAttrs);
} finally {
if (byteArray != IntPtr.Zero) {
Win32Native.LocalFree(byteArray);
}
}
}
internal static unsafe void InternalCreateDirectory(string fullPath, string path, object dirSecurityObj)
{
DirectorySecurity security = (DirectorySecurity) dirSecurityObj;
int length = fullPath.Length;
if ((length >= 2) && Path.IsDirectorySeparator(fullPath[length - 1]))
{
length--;
}
int rootLength = Path.GetRootLength(fullPath);
if ((length == 2) && Path.IsDirectorySeparator(fullPath[1]))
{
throw new IOException(Environment.GetResourceString("IO.IO_CannotCreateDirectory", new object[] { path }));
}
List<string> list = new List<string>();
bool flag = false;
if (length > rootLength)
{
for (int i = length - 1; (i >= rootLength) && !flag; i--)
{
string str = fullPath.Substring(0, i + 1);
if (!InternalExists(str))
{
list.Add(str);
}
else
{
flag = true;
}
while (((i > rootLength) && (fullPath[i] != Path.DirectorySeparatorChar)) && (fullPath[i] != Path.AltDirectorySeparatorChar))
{
i--;
}
}
}
int count = list.Count;
if (list.Count != 0)
{
string[] array = new string[list.Count];
list.CopyTo(array, 0);
for (int j = 0; j < array.Length; j++)
{
string[] strArray2;
IntPtr ptr;
(strArray2 = array)[(int) (ptr = (IntPtr) j)] = strArray2[(int) ptr] + @"\.";
}
AccessControlActions control = (security == null) ? AccessControlActions.None : AccessControlActions.Change;
new FileIOPermission(FileIOPermissionAccess.Write, control, array, false, false).Demand();
}
Win32Native.SECURITY_ATTRIBUTES structure = null;
if (security != null)
{
structure = new Win32Native.SECURITY_ATTRIBUTES {
nLength = Marshal.SizeOf(structure)
};
byte[] securityDescriptorBinaryForm = security.GetSecurityDescriptorBinaryForm();
byte* pDest = stackalloc byte[(IntPtr) securityDescriptorBinaryForm.Length];
Buffer.memcpy(securityDescriptorBinaryForm, 0, pDest, 0, securityDescriptorBinaryForm.Length);
structure.pSecurityDescriptor = pDest;
}
bool flag2 = true;
int errorCode = 0;
string maybeFullPath = path;
while (list.Count > 0)
{
string str3 = list[list.Count - 1];
list.RemoveAt(list.Count - 1);
if (str3.Length >= 0xf8)
{
throw new PathTooLongException(Environment.GetResourceString("IO.PathTooLong"));
}
flag2 = Win32Native.CreateDirectory(str3, structure);
if (!flag2 && (errorCode == 0))
{
int lastError = Marshal.GetLastWin32Error();
if (lastError != 0xb7)
{
errorCode = lastError;
}
else if (File.InternalExists(str3) || (!InternalExists(str3, out lastError) && (lastError == 5)))
{
errorCode = lastError;
try
{
new FileIOPermission(FileIOPermissionAccess.PathDiscovery, GetDemandDir(str3, true)).Demand();
maybeFullPath = str3;
continue;
}
catch (SecurityException)
{
continue;
}
}
}
}
if ((count == 0) && !flag)
{
if (!InternalExists(InternalGetDirectoryRoot(fullPath)))
{
__Error.WinIOError(3, InternalGetDirectoryRoot(path));
}
}
else if (!flag2 && (errorCode != 0))
{
__Error.WinIOError(errorCode, maybeFullPath);
}
}
private unsafe RegistryKey CreateSubKeyInternal(string subkey, RegistryKeyPermissionCheck permissionCheck, object registrySecurityObj, RegistryOptions registryOptions)
{
ValidateKeyOptions(registryOptions);
ValidateKeyName(subkey);
ValidateKeyMode(permissionCheck);
this.EnsureWriteable();
subkey = FixupName(subkey);
if (!this.remoteKey)
{
RegistryKey key = this.InternalOpenSubKey(subkey, permissionCheck != RegistryKeyPermissionCheck.ReadSubTree);
if (key != null)
{
this.CheckPermission(RegistryInternalCheck.CheckSubKeyWritePermission, subkey, false, RegistryKeyPermissionCheck.Default);
this.CheckPermission(RegistryInternalCheck.CheckSubTreePermission, subkey, false, permissionCheck);
key.checkMode = permissionCheck;
return key;
}
}
this.CheckPermission(RegistryInternalCheck.CheckSubKeyCreatePermission, subkey, false, RegistryKeyPermissionCheck.Default);
Win32Native.SECURITY_ATTRIBUTES structure = null;
RegistrySecurity security = (RegistrySecurity) registrySecurityObj;
if (security != null)
{
structure = new Win32Native.SECURITY_ATTRIBUTES {
nLength = Marshal.SizeOf(structure)
};
byte[] securityDescriptorBinaryForm = security.GetSecurityDescriptorBinaryForm();
byte* pDest = stackalloc byte[(IntPtr) securityDescriptorBinaryForm.Length];
Buffer.memcpy(securityDescriptorBinaryForm, 0, pDest, 0, securityDescriptorBinaryForm.Length);
structure.pSecurityDescriptor = pDest;
}
int lpdwDisposition = 0;
SafeRegistryHandle hkResult = null;
int errorCode = Win32Native.RegCreateKeyEx(this.hkey, subkey, 0, null, (int) registryOptions, GetRegistryKeyAccess(permissionCheck != RegistryKeyPermissionCheck.ReadSubTree, this.regView), structure, out hkResult, out lpdwDisposition);
if ((errorCode == 0) && !hkResult.IsInvalid)
{
RegistryKey key2 = new RegistryKey(hkResult, permissionCheck != RegistryKeyPermissionCheck.ReadSubTree, false, this.remoteKey, false, this.regView);
this.CheckPermission(RegistryInternalCheck.CheckSubTreePermission, subkey, false, permissionCheck);
key2.checkMode = permissionCheck;
if (subkey.Length == 0)
{
key2.keyName = this.keyName;
return key2;
}
key2.keyName = this.keyName + @"\" + subkey;
return key2;
}
if (errorCode != 0)
{
this.Win32Error(errorCode, this.keyName + @"\" + subkey);
}
return null;
}
internal static unsafe void AcquireReservedMutex(ref bool bHandleObtained)
{
SafeWaitHandle handle = null;
bHandleObtained = false;
if (Environment.IsW2k3)
{
if (s_ReservedMutex == null)
{
Win32Native.SECURITY_ATTRIBUTES security_attributes;
MutexSecurity security = new MutexSecurity();
SecurityIdentifier identity = new SecurityIdentifier(WellKnownSidType.WorldSid, null);
security.AddAccessRule(new MutexAccessRule(identity, MutexRights.FullControl, AccessControlType.Allow));
security_attributes = new Win32Native.SECURITY_ATTRIBUTES {
nLength = Marshal.SizeOf(security_attributes)
};
byte[] securityDescriptorBinaryForm = security.GetSecurityDescriptorBinaryForm();
byte* pDest = stackalloc byte[(IntPtr) securityDescriptorBinaryForm.Length];
Buffer.memcpy(securityDescriptorBinaryForm, 0, pDest, 0, securityDescriptorBinaryForm.Length);
security_attributes.pSecurityDescriptor = pDest;
RuntimeHelpers.PrepareConstrainedRegions();
try
{
}
finally
{
handle = Win32Native.CreateMutex(security_attributes, false, @"Global\CLR_RESERVED_MUTEX_NAME");
handle.SetAsReservedMutex();
}
int errorCode = Marshal.GetLastWin32Error();
if (handle.IsInvalid)
{
handle.SetHandleAsInvalid();
__Error.WinIOError(errorCode, @"Global\CLR_RESERVED_MUTEX_NAME");
}
Mutex mutex = new Mutex(handle);
Interlocked.CompareExchange<Mutex>(ref s_ReservedMutex, mutex, null);
}
RuntimeHelpers.PrepareConstrainedRegions();
try
{
}
finally
{
try
{
s_ReservedMutex.WaitOne();
bHandleObtained = true;
}
catch (AbandonedMutexException)
{
bHandleObtained = true;
}
}
}
}
public unsafe EventWaitHandle(bool initialState, EventResetMode mode, string name, out bool createdNew, EventWaitHandleSecurity eventSecurity)
{
if(null != name && System.IO.Path.MAX_PATH < name.Length)
{
throw new ArgumentException(Environment.GetResourceString("Argument_WaitHandleNameTooLong",name));
}
Contract.EndContractBlock();
Win32Native.SECURITY_ATTRIBUTES secAttrs = null;
#if FEATURE_MACL
// For ACL's, get the security descriptor from the EventWaitHandleSecurity.
if (eventSecurity != null) {
secAttrs = new Win32Native.SECURITY_ATTRIBUTES();
secAttrs.nLength = (int)Marshal.SizeOf(secAttrs);
byte[] sd = eventSecurity.GetSecurityDescriptorBinaryForm();
byte* pSecDescriptor = stackalloc byte[sd.Length];
Buffer.Memcpy(pSecDescriptor, 0, sd, 0, sd.Length);
secAttrs.pSecurityDescriptor = pSecDescriptor;
}
#endif
SafeWaitHandle _handle = null;
Boolean isManualReset;
switch(mode)
{
case EventResetMode.ManualReset:
isManualReset = true;
break;
case EventResetMode.AutoReset:
isManualReset = false;
break;
default:
throw new ArgumentException(Environment.GetResourceString("Argument_InvalidFlag",name));
};
_handle = Win32Native.CreateEvent(secAttrs, isManualReset, initialState, name);
int errorCode = Marshal.GetLastWin32Error();
if (_handle.IsInvalid)
{
_handle.SetHandleAsInvalid();
if(null != name && 0 != name.Length && Win32Native.ERROR_INVALID_HANDLE == errorCode)
throw new WaitHandleCannotBeOpenedException(Environment.GetResourceString("Threading.WaitHandleCannotBeOpenedException_InvalidHandle",name));
__Error.WinIOError(errorCode, name);
}
createdNew = errorCode != Win32Native.ERROR_ALREADY_EXISTS;
SetHandleInternal(_handle);
}
internal MutexTryCodeHelper(bool initiallyOwned,MutexCleanupInfo cleanupInfo, String name, Win32Native.SECURITY_ATTRIBUTES secAttrs, Mutex mutex)
{
Contract.Assert(name == null || name.Length != 0);
m_initiallyOwned = initiallyOwned;
m_cleanupInfo = cleanupInfo;
m_name = name;
m_secAttrs = secAttrs;
m_mutex = mutex;
}
internal FileStream(String path, FileMode mode, FileAccess access, FileShare share, int bufferSize, bool useAsync, String msgPath, bool bFromProxy)
{
// Note: msgPath must be safe to hand back to untrusted code.
_fileName = msgPath; // To handle odd cases of finalizing partially constructed objects.
if (path == null)
throw new ArgumentNullException("path", Environment.GetResourceString("ArgumentNull_Path"));
if (path.Length == 0)
throw new ArgumentException(Environment.GetResourceString("Argument_EmptyPath"));
if (mode < FileMode.CreateNew || mode > FileMode.Append ||
access < FileAccess.Read || access > FileAccess.ReadWrite ||
share < FileShare.None || share > FileShare.ReadWrite) {
String badArg = "mode";
if (access < FileAccess.Read || access > FileAccess.ReadWrite)
badArg = "access";
if (share < FileShare.None || share > FileShare.ReadWrite)
badArg = "share";
throw new ArgumentOutOfRangeException(badArg, Environment.GetResourceString("ArgumentOutOfRange_Enum"));
}
if (bufferSize <= 0)
throw new ArgumentOutOfRangeException("bufferSize", Environment.GetResourceString("ArgumentOutOfRange_NeedPosNum"));
int fAccess = access == FileAccess.Read? GENERIC_READ:
access == FileAccess.Write? GENERIC_WRITE:
GENERIC_READ | GENERIC_WRITE;
// Get absolute path - Security needs this to prevent something
// like trying to create a file in c:\tmp with the name
// "..\WinNT\System32\ntoskrnl.exe". Store it for user convenience.
String filePath = Path.GetFullPathInternal(path);
_fileName = filePath;
// Build up security permissions required, as well as validate we
// have a sensible set of parameters. IE, creating a brand new file
// for reading doesn't make much sense.
FileIOPermissionAccess secAccess = FileIOPermissionAccess.NoAccess;
if ((access & FileAccess.Read) != 0) {
if (mode==FileMode.Append)
throw new ArgumentException(Environment.GetResourceString("Argument_InvalidAppendMode"));
else
secAccess = secAccess | FileIOPermissionAccess.Read;
}
// I can't think of any combos of FileMode we should disallow if we
// don't have read access. Writing would pretty much always be valid
// in those cases.
if ((access & FileAccess.Write) != 0) {
if (mode==FileMode.Append)
secAccess = secAccess | FileIOPermissionAccess.Append;
else
secAccess = secAccess | FileIOPermissionAccess.Write;
}
else {
// No write access
if (mode==FileMode.Truncate || mode==FileMode.CreateNew || mode==FileMode.Create || mode==FileMode.Append)
throw new ArgumentException(String.Format(Environment.GetResourceString("Argument_InvalidFileMode&AccessCombo"), mode, access));
}
new FileIOPermission(secAccess, new String[] { filePath }, false, false).Demand();
bool seekToEnd = (mode==FileMode.Append);
// Must use a valid Win32 constant here...
if (mode == FileMode.Append)
mode = FileMode.OpenOrCreate;
// By default, FileStream-provided handles are not inheritable by
// child processes, but with FileShare.Inheritable you can redirect
// stdout from a child process to a log file from your parent, etc.
Win32Native.SECURITY_ATTRIBUTES secAttrs = null;
if ((share & FileShare.Inheritable) != 0) {
secAttrs = new Win32Native.SECURITY_ATTRIBUTES();
secAttrs.nLength = (int)Marshal.SizeOf(secAttrs);
secAttrs.bInheritHandle = 1;
share &= ~FileShare.Inheritable;
}
// Do the right thing for whatever platform we're on. This way,
// someone can easily write code that opens a file asynchronously
// no matter what their platform is.
IntPtr handle;
if (_canUseAsync && useAsync) {
handle = Win32Native.CreateFile(filePath, fAccess, share, secAttrs, mode, FILE_FLAG_OVERLAPPED, Win32Native.NULL);
_isAsync = true;
}
else {
handle = Win32Native.CreateFile(filePath, fAccess, share, secAttrs, mode, FILE_ATTRIBUTE_NORMAL, Win32Native.NULL);
_isAsync = false;
}
if (handle != Win32Native.INVALID_HANDLE_VALUE) {
_handleProtector = new __FileStreamHandleProtector(handle, true);
}
else {
// Return a meaningful error, using the RELATIVE path to
// the file to avoid returning extra information to the caller
// unless they have path discovery permission, in which case
// the full path is fine & useful.
// NT5 oddity - when trying to open "C:\" as a FileStream,
// we usually get ERROR_PATH_NOT_FOUND from the OS. We should
// probably be consistent w/ every other directory.
int hr = Marshal.GetLastWin32Error();
if (hr==__Error.ERROR_PATH_NOT_FOUND && filePath.Equals(Directory.InternalGetDirectoryRoot(filePath)))
hr = __Error.ERROR_ACCESS_DENIED;
// We need to give an exception, and preferably it would include
// the fully qualified path name. Do security check here. If
// we fail, give back the msgPath, which should not reveal much.
bool canGiveFullPath = false;
if (!bFromProxy)
{
try {
new FileIOPermission(FileIOPermissionAccess.PathDiscovery, new String[] { _fileName }, false, false ).Demand();
canGiveFullPath = true;
}
catch(SecurityException) {}
}
if (canGiveFullPath)
__Error.WinIOError(hr, _fileName);
else
__Error.WinIOError(hr, msgPath);
}
// Disallow access to all non-file devices from the FileStream
// constructors that take a String. Everyone else can call
// CreateFile themselves then use the constructor that takes an
// IntPtr. Disallows "con:", "com1:", "lpt1:", etc.
int fileType = Win32Native.GetFileType(handle);
if (fileType != Win32Native.FILE_TYPE_DISK) {
_handleProtector.Close();
throw new NotSupportedException(Environment.GetResourceString("NotSupported_FileStreamOnNonFiles"));
}
_canRead = (access & FileAccess.Read) != 0;
_canWrite = (access & FileAccess.Write) != 0;
_canSeek = true;
_isPipe = false;
_pos = 0;
_bufferSize = bufferSize;
_readPos = 0;
_readLen = 0;
_writePos = 0;
// For Append mode...
if (seekToEnd) {
_appendStart = SeekCore(0, SeekOrigin.End);
}
else {
_appendStart = -1;
}
}
private static Win32Native.SECURITY_ATTRIBUTES GetSecAttrs(FileShare share)
{
Win32Native.SECURITY_ATTRIBUTES secAttrs = null;
if ((share & FileShare.Inheritable) != 0) {
secAttrs = new Win32Native.SECURITY_ATTRIBUTES();
secAttrs.nLength = (int)Marshal.SizeOf(secAttrs);
secAttrs.bInheritHandle = 1;
}
return secAttrs;
}
internal MutexTryCodeHelper(bool initiallyOwned,MutexCleanupInfo cleanupInfo, String name, Win32Native.SECURITY_ATTRIBUTES secAttrs, Mutex mutex)
{
m_initiallyOwned = initiallyOwned;
m_cleanupInfo = cleanupInfo;
m_name = name;
m_secAttrs = secAttrs;
m_mutex = mutex;
}
internal unsafe static void InternalCreateDirectory(String fullPath, String path, Object dirSecurityObj, bool checkHost)
{
#if FEATURE_MACL
DirectorySecurity dirSecurity = (DirectorySecurity)dirSecurityObj;
#endif // FEATURE_MACL
int length = fullPath.Length;
// We need to trim the trailing slash or the code will try to create 2 directories of the same name.
if (length >= 2 && Path.IsDirectorySeparator(fullPath[length - 1]))
length--;
int lengthRoot = Path.GetRootLength(fullPath);
// For UNC paths that are only // or ///
if (length == 2 && Path.IsDirectorySeparator(fullPath[1]))
throw new IOException(Environment.GetResourceString("IO.IO_CannotCreateDirectory", path));
// We can save a bunch of work if the directory we want to create already exists. This also
// saves us in the case where sub paths are inaccessible (due to ERROR_ACCESS_DENIED) but the
// final path is accessable and the directory already exists. For example, consider trying
// to create c:\Foo\Bar\Baz, where everything already exists but ACLS prevent access to c:\Foo
// and c:\Foo\Bar. In that case, this code will think it needs to create c:\Foo, and c:\Foo\Bar
// and fail to due so, causing an exception to be thrown. This is not what we want.
if (InternalExists(fullPath)) {
return;
}
List<string> stackDir = new List<string>();
// Attempt to figure out which directories don't exist, and only
// create the ones we need. Note that InternalExists may fail due
// to Win32 ACL's preventing us from seeing a directory, and this
// isn't threadsafe.
bool somepathexists = false;
if (length > lengthRoot) { // Special case root (fullpath = X:\\)
int i = length-1;
while (i >= lengthRoot && !somepathexists) {
String dir = fullPath.Substring(0, i+1);
if (!InternalExists(dir)) // Create only the ones missing
stackDir.Add(dir);
else
somepathexists = true;
while (i > lengthRoot && fullPath[i] != Path.DirectorySeparatorChar && fullPath[i] != Path.AltDirectorySeparatorChar) i--;
i--;
}
}
int count = stackDir.Count;
if (stackDir.Count != 0
#if FEATURE_CAS_POLICY
// All demands in full trust domains are no-ops, so skip
//
// The full path went through validity checks by being passed through FileIOPermissions already.
// As a sub string of the full path can't fail the checks if the full path passes.
&& !CodeAccessSecurityEngine.QuickCheckForAllDemands()
#endif
)
{
String[] securityList = new String[stackDir.Count];
stackDir.CopyTo(securityList, 0);
for (int j = 0 ; j < securityList.Length; j++)
securityList[j] += "\\."; // leaf will never have a slash at the end
// Security check for all directories not present only.
#if FEATURE_MACL
AccessControlActions control = (dirSecurity == null) ? AccessControlActions.None : AccessControlActions.Change;
FileIOPermission.QuickDemand(FileIOPermissionAccess.Write, control, securityList, false, false);
#else
#if FEATURE_CORECLR
if (checkHost)
{
foreach (String demandPath in securityList)
{
FileSecurityState state = new FileSecurityState(FileSecurityStateAccess.Write, String.Empty, demandPath);
state.EnsureState();
}
}
#else
FileIOPermission.QuickDemand(FileIOPermissionAccess.Write, securityList, false, false);
#endif
#endif //FEATURE_MACL
}
// If we were passed a DirectorySecurity, convert it to a security
// descriptor and set it in he call to CreateDirectory.
Win32Native.SECURITY_ATTRIBUTES secAttrs = null;
#if FEATURE_MACL
if (dirSecurity != null) {
secAttrs = new Win32Native.SECURITY_ATTRIBUTES();
secAttrs.nLength = (int)Marshal.SizeOf(secAttrs);
// For ACL's, get the security descriptor from the FileSecurity.
byte[] sd = dirSecurity.GetSecurityDescriptorBinaryForm();
byte * bytesOnStack = stackalloc byte[sd.Length];
Buffer.Memcpy(bytesOnStack, 0, sd, 0, sd.Length);
secAttrs.pSecurityDescriptor = bytesOnStack;
}
#endif
bool r = true;
int firstError = 0;
String errorString = path;
// If all the security checks succeeded create all the directories
while (stackDir.Count > 0) {
String name = stackDir[stackDir.Count - 1];
stackDir.RemoveAt(stackDir.Count - 1);
if (PathInternal.IsDirectoryTooLong(name))
throw new PathTooLongException(Environment.GetResourceString("IO.PathTooLong"));
r = Win32Native.CreateDirectory(name, secAttrs);
if (!r && (firstError == 0)) {
int currentError = Marshal.GetLastWin32Error();
// While we tried to avoid creating directories that don't
// exist above, there are at least two cases that will
// cause us to see ERROR_ALREADY_EXISTS here. InternalExists
// can fail because we didn't have permission to the
// directory. Secondly, another thread or process could
// create the directory between the time we check and the
// time we try using the directory. Thirdly, it could
// fail because the target does exist, but is a file.
if (currentError != Win32Native.ERROR_ALREADY_EXISTS)
firstError = currentError;
else {
// If there's a file in this directory's place, or if we have ERROR_ACCESS_DENIED when checking if the directory already exists throw.
if (File.InternalExists(name) || (!InternalExists(name, out currentError) && currentError == Win32Native.ERROR_ACCESS_DENIED)) {
firstError = currentError;
// Give the user a nice error message, but don't leak path information.
try {
#if FEATURE_CORECLR
if (checkHost)
{
FileSecurityState state = new FileSecurityState(FileSecurityStateAccess.PathDiscovery, String.Empty, GetDemandDir(name, true));
state.EnsureState();
}
#else
FileIOPermission.QuickDemand(FileIOPermissionAccess.PathDiscovery, GetDemandDir(name, true));
#endif // FEATURE_CORECLR
errorString = name;
}
catch(SecurityException) {}
}
}
}
}
// We need this check to mask OS differences
// Handle CreateDirectory("X:\\foo") when X: doesn't exist. Similarly for n/w paths.
if ((count == 0) && !somepathexists) {
String root = InternalGetDirectoryRoot(fullPath);
if (!InternalExists(root)) {
// Extract the root from the passed in path again for security.
__Error.WinIOError(Win32Native.ERROR_PATH_NOT_FOUND, InternalGetDirectoryRoot(path));
}
return;
}
// Only throw an exception if creating the exact directory we
// wanted failed to work correctly.
if (!r && (firstError != 0)) {
__Error.WinIOError(firstError, errorString);
}
}
[System.Security.SecuritySafeCritical] // auto-generated
private unsafe static Win32Native.SECURITY_ATTRIBUTES GetSecAttrs(FileShare share, FileSecurity fileSecurity, out Object pinningHandle)
{
pinningHandle = null;
Win32Native.SECURITY_ATTRIBUTES secAttrs = null;
if ((share & FileShare.Inheritable) != 0 || fileSecurity != null) {
secAttrs = new Win32Native.SECURITY_ATTRIBUTES();
secAttrs.nLength = (int)Marshal.SizeOf(secAttrs);
if ((share & FileShare.Inheritable) != 0) {
secAttrs.bInheritHandle = 1;
}
// For ACL's, get the security descriptor from the FileSecurity.
if (fileSecurity != null) {
byte[] sd = fileSecurity.GetSecurityDescriptorBinaryForm();
pinningHandle = GCHandle.Alloc(sd, GCHandleType.Pinned);
fixed(byte* pSecDescriptor = sd)
secAttrs.pSecurityDescriptor = pSecDescriptor;
}
}
return secAttrs;
}
