CreateProcessAsUser() windowstations 和桌面_createprocessasuser 998 lpdesktop-优快云博客

本文介绍了一段示例代码，该代码用于给予指定用户（如franki）对Windows系统的winsta0//default桌面完全访问权限。通过调整安全描述符和访问控制列表（ACL），实现对窗口工作站和桌面的权限管理。

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以下示例代码使用户名为 " franki " 完全访问权限交互 windowstation 桌面， " winsta0//default "。对于每个对象访问控制项 (ACE) 是基于 franki 的登录 SID。代码执行 Cmd.exe 文件。

#define RTN_OK 0

#define RTN_ERROR 13

#define WINSTA_ALL (WINSTA_ACCESSCLIPBOARD | WINSTA_ACCESSGLOBALATOMS |

WINSTA_CREATEDESKTOP | WINSTA_ENUMDESKTOPS |

WINSTA_ENUMERATE | WINSTA_EXITWINDOWS |

WINSTA_READATTRIBUTES | WINSTA_READSCREEN |

WINSTA_WRITEATTRIBUTES | DELETE |

READ_CONTROL | WRITE_DAC |

WRITE_OWNER)

#define DESKTOP_ALL (DESKTOP_CREATEMENU | DESKTOP_CREATEWINDOW |

DESKTOP_ENUMERATE | DESKTOP_HOOKCONTROL |

DESKTOP_JOURNALPLAYBACK | DESKTOP_JOURNALRECORD |

DESKTOP_READOBJECTS | DESKTOP_SWITCHDESKTOP |

DESKTOP_WRITEOBJECTS | DELETE |

READ_CONTROL | WRITE_DAC |

WRITE_OWNER)

#define GENERIC_ACCESS (GENERIC_READ | GENERIC_WRITE |

GENERIC_EXECUTE | GENERIC_ALL)

#include <windows.h>

#include <stdio.h>

BOOL ObtainSid(

HANDLE hToken, // Handle to an process access token.

PSID *psid // ptr to the buffer of the logon sid

);

void RemoveSid(

PSID *psid // ptr to the buffer of the logon sid

);

BOOL AddTheAceWindowStation(

HWINSTA hwinsta, // handle to a windowstation

PSID psid // logon sid of the process

);

BOOL AddTheAceDesktop(

HDESK hdesk, // handle to a desktop

PSID psid // logon sid of the process

);

int main(void)

{

HANDLE hToken;

HDESK hdesk;

HWINSTA hwinsta;

PROCESS_INFORMATION pi;

PSID psid;

STARTUPINFO si;

// obtain an access token for the user fester

if (!LogonUser(

"franki",

NULL,

"franki",

LOGON32_LOGON_INTERACTIVE,

LOGON32_PROVIDER_DEFAULT,

&hToken

))

return RTN_ERROR;

// obtain a handle to the interactive windowstation

hwinsta = OpenWindowStation(

"winsta0",

FALSE,

READ_CONTROL | WRITE_DAC

);

if (hwinsta == NULL)

return RTN_ERROR;

HWINSTA hwinstaold = GetProcessWindowStation();

// set the windowstation to winsta0 so that you obtain the

// correct default desktop

if (!SetProcessWindowStation(hwinsta))

return RTN_ERROR;

// obtain a handle to the "default" desktop

hdesk = OpenDesktop(

"default",

FALSE,

READ_CONTROL | WRITE_DAC |

DESKTOP_WRITEOBJECTS | DESKTOP_READOBJECTS

);

if (hdesk == NULL)

return RTN_ERROR;

// obtain the logon sid of the user fester

if (!ObtainSid(hToken, &psid))

return RTN_ERROR;

// add the user to interactive windowstation

if (!AddTheAceWindowStation(hwinsta, psid))

return RTN_ERROR;

// add user to "default" desktop

if (!AddTheAceDesktop(hdesk, psid))

return RTN_ERROR;

// free the buffer for the logon sid

RemoveSid(&psid);

// close the handles to the interactive windowstation and desktop

CloseWindowStation(hwinsta);

CloseDesktop(hdesk);

// initialize STARTUPINFO structure

ZeroMemory(&si, sizeof(STARTUPINFO));

si.cb = sizeof(STARTUPINFO);

si.lpDesktop = "winsta0/default";

// start the process

if (!CreateProcessAsUser(

hToken,

NULL,

"cmd.exe",

NULL,

FALSE,

NORMAL_PRIORITY_CLASS | CREATE_NEW_CONSOLE,

NULL,

&si,

&pi

))

return RTN_ERROR;

SetProcessWindowStation(hwinstaold); //set it back

// close the handles

CloseHandle(pi.hProcess);

CloseHandle(pi.hThread);

return RTN_OK;

}

BOOL ObtainSid(HANDLE hToken, PSID *psid)

{

BOOL bSuccess = FALSE; // assume function will

// fail

DWORD dwIndex;

DWORD dwLength = 0;

TOKEN_INFORMATION_CLASS tic = TokenGroups;

PTOKEN_GROUPS ptg = NULL;

__try

{

// determine the size of the buffer

if (!GetTokenInformation(

hToken,

tic,

(LPVOID)ptg,

&dwLength

))

{

if (GetLastError() == ERROR_INSUFFICIENT_BUFFER)

{

ptg = (PTOKEN_GROUPS)HeapAlloc(

GetProcessHeap(),

HEAP_ZERO_MEMORY,

dwLength

);

if (ptg == NULL)

__leave;

}

else

__leave;

}

// obtain the groups the access token belongs to

if (!GetTokenInformation(

hToken,

tic,

(LPVOID)ptg,

dwLength,

&dwLength

))

__leave;

// determine which group is the logon sid

for (dwIndex = 0; dwIndex < ptg->GroupCount; dwIndex++)

{

if ((ptg->Groups[dwIndex].Attributes & SE_GROUP_LOGON_ID)

== SE_GROUP_LOGON_ID)

{

// determine the length of the sid

dwLength = GetLengthSid(ptg->Groups[dwIndex].Sid);

// allocate a buffer for the logon sid

*psid = (PSID)HeapAlloc(

GetProcessHeap(),

HEAP_ZERO_MEMORY,

dwLength

);

if (*psid == NULL)

__leave;

// obtain a copy of the logon sid

if (!CopySid(dwLength, *psid, ptg->Groups[dwIndex].Sid))

__leave;

// break out of the loop because the logon sid has been

// found

break;

}

// indicate success

bSuccess = TRUE;

}

__finally

{

// free the buffer for the token group

if (ptg != NULL)

HeapFree(GetProcessHeap(), 0, (LPVOID)ptg);

}

return bSuccess;

}

void RemoveSid(PSID *psid)

{

HeapFree(GetProcessHeap(), 0, (LPVOID)*psid);

}

BOOL AddTheAceWindowStation(HWINSTA hwinsta, PSID psid)

{

ACCESS_ALLOWED_ACE *pace;

ACL_SIZE_INFORMATION aclSizeInfo;

BOOL bDaclExist;

BOOL bDaclPresent;

BOOL bSuccess = FALSE; // assume function will

//fail

DWORD dwNewAclSize;

DWORD dwSidSize = 0;

DWORD dwSdSizeNeeded;

PACL pacl;

PACL pNewAcl;

PSECURITY_DESCRIPTOR psd = NULL;

PSECURITY_DESCRIPTOR psdNew = NULL;

PVOID pTempAce;

SECURITY_INFORMATION si = DACL_SECURITY_INFORMATION;

unsigned int i;

__try

{

// obtain the dacl for the windowstation

if (!GetUserObjectSecurity(

hwinsta,

&si,

psd,

dwSidSize,

&dwSdSizeNeeded

))

if (GetLastError() == ERROR_INSUFFICIENT_BUFFER)

{

psd = (PSECURITY_DESCRIPTOR)HeapAlloc(

GetProcessHeap(),

HEAP_ZERO_MEMORY,

dwSdSizeNeeded

);

if (psd == NULL)

__leave;

psdNew = (PSECURITY_DESCRIPTOR)HeapAlloc(

GetProcessHeap(),

HEAP_ZERO_MEMORY,

dwSdSizeNeeded

);

if (psdNew == NULL)

__leave;

dwSidSize = dwSdSizeNeeded;

if (!GetUserObjectSecurity(

hwinsta,

&si,

psd,

dwSidSize,

&dwSdSizeNeeded

))

__leave;

}

else

__leave;

// create a new dacl

if (!InitializeSecurityDescriptor(

psdNew,

SECURITY_DESCRIPTOR_REVISION

))

__leave;

// get dacl from the security descriptor

if (!GetSecurityDescriptorDacl(

psd,

&bDaclPresent,

&pacl,

&bDaclExist

))

__leave;

// initialize

ZeroMemory(&aclSizeInfo, sizeof(ACL_SIZE_INFORMATION));

aclSizeInfo.AclBytesInUse = sizeof(ACL);

// call only if the dacl is not NULL

if (pacl != NULL)

{

// get the file ACL size info

if (!GetAclInformation(

pacl,

(LPVOID)&aclSizeInfo,

sizeof(ACL_SIZE_INFORMATION),

AclSizeInformation

))

__leave;

}

// compute the size of the new acl

dwNewAclSize = aclSizeInfo.AclBytesInUse + (2 *

sizeof(ACCESS_ALLOWED_ACE)) + (2 * GetLengthSid(psid)) - (2 *

sizeof(DWORD));

// allocate memory for the new acl

pNewAcl = (PACL)HeapAlloc(

GetProcessHeap(),

HEAP_ZERO_MEMORY,

dwNewAclSize

);

if (pNewAcl == NULL)

__leave;

// initialize the new dacl

if (!InitializeAcl(pNewAcl, dwNewAclSize, ACL_REVISION))

__leave;

// if DACL is present, copy it to a new DACL

if (bDaclPresent) // only copy if DACL was present

{

// copy the ACEs to our new ACL

if (aclSizeInfo.AceCount)

{

for (i=0; i < aclSizeInfo.AceCount; i++)

{

// get an ACE

if (!GetAce(pacl, i, &pTempAce))

__leave;

// add the ACE to the new ACL

if (!AddAce(

pNewAcl,

ACL_REVISION,

MAXDWORD,

pTempAce,

((PACE_HEADER)pTempAce)->AceSize

))

__leave;

}

// add the first ACE to the windowstation

pace = (ACCESS_ALLOWED_ACE *)HeapAlloc(

GetProcessHeap(),

HEAP_ZERO_MEMORY,

sizeof(ACCESS_ALLOWED_ACE) + GetLengthSid(psid) -

sizeof(DWORD

));

if (pace == NULL)

__leave;

pace->Header.AceType = ACCESS_ALLOWED_ACE_TYPE;

pace->Header.AceFlags = CONTAINER_INHERIT_ACE |

INHERIT_ONLY_ACE |

OBJECT_INHERIT_ACE;

pace->Header.AceSize = sizeof(ACCESS_ALLOWED_ACE) +

GetLengthSid(psid) - sizeof(DWORD);

pace->Mask = GENERIC_ACCESS;

if (!CopySid(GetLengthSid(psid), &pace->SidStart, psid))

__leave;

if (!AddAce(

pNewAcl,

ACL_REVISION,

MAXDWORD,

(LPVOID)pace,

pace->Header.AceSize

))

__leave;

// add the second ACE to the windowstation

pace->Header.AceFlags = NO_PROPAGATE_INHERIT_ACE;

pace->Mask = WINSTA_ALL;

if (!AddAce(

pNewAcl,

ACL_REVISION,

MAXDWORD,

(LPVOID)pace,

pace->Header.AceSize

))

__leave;

// set new dacl for the security descriptor

if (!SetSecurityDescriptorDacl(

psdNew,

TRUE,

pNewAcl,

FALSE

))

__leave;

// set the new security descriptor for the windowstation

if (!SetUserObjectSecurity(hwinsta, &si, psdNew))

__leave;

// indicate success

bSuccess = TRUE;

}

__finally

{

// free the allocated buffers

if (pace != NULL)

HeapFree(GetProcessHeap(), 0, (LPVOID)pace);

if (pNewAcl != NULL)

HeapFree(GetProcessHeap(), 0, (LPVOID)pNewAcl);

if (psd != NULL)

HeapFree(GetProcessHeap(), 0, (LPVOID)psd);

if (psdNew != NULL)

HeapFree(GetProcessHeap(), 0, (LPVOID)psdNew);

}

return bSuccess;

}

BOOL AddTheAceDesktop(HDESK hdesk, PSID psid)

{

ACL_SIZE_INFORMATION aclSizeInfo;

BOOL bDaclExist;

BOOL bDaclPresent;

BOOL bSuccess = FALSE; // assume function will

// fail

DWORD dwNewAclSize;

DWORD dwSidSize = 0;

DWORD dwSdSizeNeeded;

PACL pacl;

PACL pNewAcl;

PSECURITY_DESCRIPTOR psd = NULL;

PSECURITY_DESCRIPTOR psdNew = NULL;

PVOID pTempAce;

SECURITY_INFORMATION si = DACL_SECURITY_INFORMATION;

unsigned int i;

__try

{

// obtain the security descriptor for the desktop object

if (!GetUserObjectSecurity(

hdesk,

&si,

psd,

dwSidSize,

&dwSdSizeNeeded

))

{

if (GetLastError() == ERROR_INSUFFICIENT_BUFFER)

{

psd = (PSECURITY_DESCRIPTOR)HeapAlloc(

GetProcessHeap(),

HEAP_ZERO_MEMORY,

dwSdSizeNeeded

);

if (psd == NULL)

__leave;

psdNew = (PSECURITY_DESCRIPTOR)HeapAlloc(

GetProcessHeap(),

HEAP_ZERO_MEMORY,

dwSdSizeNeeded

);

if (psdNew == NULL)

__leave;

dwSidSize = dwSdSizeNeeded;

if (!GetUserObjectSecurity(

hdesk,

&si,

psd,

dwSidSize,

&dwSdSizeNeeded

))

__leave;

}

else

__leave;

}

// create a new security descriptor

if (!InitializeSecurityDescriptor(

psdNew,

SECURITY_DESCRIPTOR_REVISION

))

_ _leave;

// obtain the dacl from the security descriptor

if (!GetSecurityDescriptorDacl(

psd,

&bDaclPresent,

&pacl,

&bDaclExist

))

__leave;

// initialize

ZeroMemory(&aclSizeInfo, sizeof(ACL_SIZE_INFORMATION));

aclSizeInfo.AclBytesInUse = sizeof(ACL);

// call only if NULL dacl

if (pacl != NULL)

{

// determine the size of the ACL info

if (!GetAclInformation(

pacl,

(LPVOID)&aclSizeInfo,

sizeof(ACL_SIZE_INFORMATION),

AclSizeInformation

))

__leave;

}

// compute the size of the new acl

dwNewAclSize = aclSizeInfo.AclBytesInUse +

sizeof(ACCESS_ALLOWED_ACE) +

GetLengthSid(psid) - sizeof(DWORD);

// allocate buffer for the new acl

pNewAcl = (PACL)HeapAlloc(

GetProcessHeap(),

HEAP_ZERO_MEMORY,

dwNewAclSize

);

if (pNewAcl == NULL)

__leave;

// initialize the new acl

if (!InitializeAcl(pNewAcl, dwNewAclSize, ACL_REVISION))

__leave;

// if DACL is present, copy it to a new DACL

if (bDaclPresent) // only copy if DACL was present

{

// copy the ACEs to our new ACL

if (aclSizeInfo.AceCount)

{

for (i=0; i < aclSizeInfo.AceCount; i++)

{

// get an ACE

if (!GetAce(pacl, i, &pTempAce))

__leave;

// add the ACE to the new ACL

if (!AddAce(

pNewAcl,

ACL_REVISION,

MAXDWORD,

pTempAce,

((PACE_HEADER)pTempAce)->AceSize

))

__leave;

}

// add ace to the dacl

if (!AddAccessAllowedAce(

pNewAcl,

ACL_REVISION,

DESKTOP_ALL,

psid

))

__leave;

// set new dacl to the new security descriptor

if (!SetSecurityDescriptorDacl(

psdNew,

TRUE,

pNewAcl,

FALSE

))

__leave;

// set the new security descriptor for the desktop object

if (!SetUserObjectSecurity(hdesk, &si, psdNew))

__leave;

// indicate success

bSuccess = TRUE;

}

__finally

{

// free buffers

if (pNewAcl != NULL)

HeapFree(GetProcessHeap(), 0, (LPVOID)pNewAcl);

if (psd != NULL)

HeapFree(GetProcessHeap(), 0, (LPVOID)psd);

if (psdNew != NULL)

HeapFree(GetProcessHeap(), 0, (LPVOID)psdNew);

}

return bSuccess;

}