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如何从 C++ 更改 ACL?

任何人都可以在没有任何确认的情况下帮助我从 c++ 执行以下操作:

cacls c:\personal\file.txt /d everyone
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3 回答 3

15

使用以下代码

#include <Accctrl.h>
#include <Aclapi.h>
void SetFilePermission(LPCTSTR FileName)
{
    PSID pEveryoneSID = NULL;
    PACL pACL = NULL;
    EXPLICIT_ACCESS ea[1];
    SID_IDENTIFIER_AUTHORITY SIDAuthWorld = SECURITY_WORLD_SID_AUTHORITY;

    // Create a well-known SID for the Everyone group.
    AllocateAndInitializeSid(&SIDAuthWorld, 1,
                     SECURITY_WORLD_RID,
                     0, 0, 0, 0, 0, 0, 0,
                     &pEveryoneSID);

    // Initialize an EXPLICIT_ACCESS structure for an ACE.
    ZeroMemory(&ea, 1 * sizeof(EXPLICIT_ACCESS));
    ea[0].grfAccessPermissions = 0xFFFFFFFF;
    ea[0].grfAccessMode = DENY_ACCESS;
    ea[0].grfInheritance= NO_INHERITANCE;
    ea[0].Trustee.TrusteeForm = TRUSTEE_IS_SID;
    ea[0].Trustee.TrusteeType = TRUSTEE_IS_WELL_KNOWN_GROUP;
    ea[0].Trustee.ptstrName  = (LPTSTR) pEveryoneSID;

    // Create a new ACL that contains the new ACEs.
    SetEntriesInAcl(1, ea, NULL, &pACL);

    // Initialize a security descriptor.  
    PSECURITY_DESCRIPTOR pSD = (PSECURITY_DESCRIPTOR) LocalAlloc(LPTR, 
                                SECURITY_DESCRIPTOR_MIN_LENGTH); 

    InitializeSecurityDescriptor(pSD,SECURITY_DESCRIPTOR_REVISION);

    // Add the ACL to the security descriptor. 
    SetSecurityDescriptorDacl(pSD, 
            TRUE,     // bDaclPresent flag   
            pACL, 
            FALSE);   // not a default DACL 


    //Change the security attributes
    SetFileSecurity(FileName, DACL_SECURITY_INFORMATION, pSD);

    if (pEveryoneSID) 
        FreeSid(pEveryoneSID);
    if (pACL) 
        LocalFree(pACL);
    if (pSD) 
        LocalFree(pSD);
}
于 2009-05-27T05:13:23.757 回答
1

我假设您的意思是在 Windows 系统上?您需要使用 cacls 使用的 Win32 API 的 NTFS 部分。浏览 MSDN,它会在某处。例如SetSecurityInfo

于 2009-05-26T13:13:36.173 回答
0

如果您不想乱用 API(即 SetNamedSecurityInfo),您可以像这样绕过提示:

echo y|cacls filename /d everyone

由于 echo 是内置的,要从程序中调用该命令行,您可能必须运行:

cmd.exe /c echo y|cacls filename /d everyone
于 2009-05-26T13:14:27.687 回答