| 1 | // Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. |
| 2 | |
| 3 | #include "precomp.h" |
| 4 | |
| 5 | // Exit macros |
| 6 | #define AclExitOnLastError(x, s, ...) ExitOnLastErrorSource(DUTIL_SOURCE_ACLUTIL, x, s, __VA_ARGS__) |
| 7 | #define AclExitOnLastErrorDebugTrace(x, s, ...) ExitOnLastErrorDebugTraceSource(DUTIL_SOURCE_ACLUTIL, x, s, __VA_ARGS__) |
| 8 | #define AclExitWithLastError(x, s, ...) ExitWithLastErrorSource(DUTIL_SOURCE_ACLUTIL, x, s, __VA_ARGS__) |
| 9 | #define AclExitOnFailure(x, s, ...) ExitOnFailureSource(DUTIL_SOURCE_ACLUTIL, x, s, __VA_ARGS__) |
| 10 | #define AclExitOnRootFailure(x, s, ...) ExitOnRootFailureSource(DUTIL_SOURCE_ACLUTIL, x, s, __VA_ARGS__) |
| 11 | #define AclExitOnFailureDebugTrace(x, s, ...) ExitOnFailureDebugTraceSource(DUTIL_SOURCE_ACLUTIL, x, s, __VA_ARGS__) |
| 12 | #define AclExitOnNull(p, x, e, s, ...) ExitOnNullSource(DUTIL_SOURCE_ACLUTIL, p, x, e, s, __VA_ARGS__) |
| 13 | #define AclExitOnNullWithLastError(p, x, s, ...) ExitOnNullWithLastErrorSource(DUTIL_SOURCE_ACLUTIL, p, x, s, __VA_ARGS__) |
| 14 | #define AclExitOnNullDebugTrace(p, x, e, s, ...) ExitOnNullDebugTraceSource(DUTIL_SOURCE_ACLUTIL, p, x, e, s, __VA_ARGS__) |
| 15 | #define AclExitOnInvalidHandleWithLastError(p, x, s, ...) ExitOnInvalidHandleWithLastErrorSource(DUTIL_SOURCE_ACLUTIL, p, x, s, __VA_ARGS__) |
| 16 | #define AclExitOnWin32Error(e, x, s, ...) ExitOnWin32ErrorSource(DUTIL_SOURCE_ACLUTIL, e, x, s, __VA_ARGS__) |
| 17 | #define AclExitOnGdipFailure(g, x, s, ...) ExitOnGdipFailureSource(DUTIL_SOURCE_ACLUTIL, g, x, s, __VA_ARGS__) |
| 18 | |
| 19 | /******************************************************************** |
| 20 | AclCheckAccess - determines if token has appropriate privileges |
| 21 | |
| 22 | NOTE: paa->fDenyAccess and paa->dwAccessMask are ignored and must be zero |
| 23 | if hToken is NULL, the thread will be checked |
| 24 | if hToken is not NULL the token must be an impersonation token |
| 25 | ********************************************************************/ |
| 26 | extern "C" HRESULT DAPI AclCheckAccess( |
| 27 | __in HANDLE hToken, |
| 28 | __in ACL_ACCESS* paa |
| 29 | ) |
| 30 | { |
| 31 | HRESULT hr = S_OK; |
| 32 | PSID psid = NULL; |
| 33 | BOOL fIsMember = FALSE; |
| 34 | |
| 35 | AclExitOnNull(paa, hr, E_INVALIDARG, "Failed to check ACL access, because no acl access provided to check"); |
| 36 | Assert(0 == paa->fDenyAccess && 0 == paa->dwAccessMask); |
| 37 | |
| 38 | if (paa->pwzAccountName) |
| 39 | { |
| 40 | hr = AclGetAccountSid(NULL, paa->pwzAccountName, &psid); |
| 41 | AclExitOnFailure(hr, "failed to get SID for account: %ls", paa->pwzAccountName); |
| 42 | } |
| 43 | else |
| 44 | { |
| 45 | if (!::AllocateAndInitializeSid(&paa->sia, paa->nSubAuthorityCount, paa->nSubAuthority[0], paa->nSubAuthority[1], paa->nSubAuthority[2], paa->nSubAuthority[3], paa->nSubAuthority[4], paa->nSubAuthority[5], paa->nSubAuthority[6], paa->nSubAuthority[7], &psid)) |
| 46 | { |
| 47 | AclExitWithLastError(hr, "failed to initialize SID"); |
| 48 | } |
| 49 | } |
| 50 | |
| 51 | if (!::CheckTokenMembership(hToken, psid, &fIsMember)) |
| 52 | { |
| 53 | AclExitWithLastError(hr, "failed to check membership"); |
| 54 | } |
| 55 | |
| 56 | fIsMember ? hr = S_OK : hr = S_FALSE; |
| 57 | |
| 58 | LExit: |
| 59 | if (psid) |
| 60 | { |
| 61 | ::FreeSid(psid); // TODO: does this have bad behavior if SID was allocated by Heap from AclGetAccountSid? |
| 62 | } |
| 63 | |
| 64 | return hr; |
| 65 | } |
| 66 | |
| 67 | |
| 68 | /******************************************************************** |
| 69 | AclCheckAdministratorAccess - determines if token has Administrator privileges |
| 70 | |
| 71 | NOTE: if hToken is NULL, the thread will be checked |
| 72 | if hToken is not NULL the token must be an impersonation token |
| 73 | ********************************************************************/ |
| 74 | extern "C" HRESULT DAPI AclCheckAdministratorAccess( |
| 75 | __in HANDLE hToken |
| 76 | ) |
| 77 | { |
| 78 | ACL_ACCESS aa; |
| 79 | SID_IDENTIFIER_AUTHORITY siaNt = SECURITY_NT_AUTHORITY; |
| 80 | |
| 81 | memset(&aa, 0, sizeof(aa)); |
| 82 | aa.sia = siaNt; |
| 83 | aa.nSubAuthorityCount = 2; |
| 84 | aa.nSubAuthority[0] = SECURITY_BUILTIN_DOMAIN_RID; |
| 85 | aa.nSubAuthority[1] = DOMAIN_ALIAS_RID_ADMINS; |
| 86 | |
| 87 | return AclCheckAccess(hToken, &aa); |
| 88 | } |
| 89 | |
| 90 | |
| 91 | /******************************************************************** |
| 92 | AclCheckLocalSystemAccess - determines if token has LocalSystem privileges |
| 93 | |
| 94 | NOTE: if hToken is NULL, the thread will be checked |
| 95 | if hToken is not NULL the token must be an impersonation token |
| 96 | ********************************************************************/ |
| 97 | extern "C" HRESULT DAPI AclCheckLocalSystemAccess( |
| 98 | __in HANDLE hToken |
| 99 | ) |
| 100 | { |
| 101 | ACL_ACCESS aa; |
| 102 | SID_IDENTIFIER_AUTHORITY siaNt = SECURITY_NT_AUTHORITY; |
| 103 | |
| 104 | memset(&aa, 0, sizeof(aa)); |
| 105 | aa.sia = siaNt; |
| 106 | aa.nSubAuthorityCount = 1; |
| 107 | aa.nSubAuthority[0] = SECURITY_LOCAL_SYSTEM_RID; |
| 108 | |
| 109 | return AclCheckAccess(hToken, &aa); |
| 110 | } |
| 111 | |
| 112 | |
| 113 | /******************************************************************** |
| 114 | AclGetWellKnownSid - returns a SID for the specified account |
| 115 | |
| 116 | ********************************************************************/ |
| 117 | extern "C" HRESULT DAPI AclGetWellKnownSid( |
| 118 | __in WELL_KNOWN_SID_TYPE wkst, |
| 119 | __deref_out PSID* ppsid |
| 120 | ) |
| 121 | { |
| 122 | Assert(ppsid); |
| 123 | |
| 124 | HRESULT hr = S_OK;; |
| 125 | PSID psid = NULL; |
| 126 | DWORD cbSid = SECURITY_MAX_SID_SIZE; |
| 127 | |
| 128 | PSID psidTemp = NULL; |
| 129 | #if(_WIN32_WINNT < 0x0501) |
| 130 | SID_IDENTIFIER_AUTHORITY siaNT = SECURITY_NT_AUTHORITY; |
| 131 | SID_IDENTIFIER_AUTHORITY siaWorld = SECURITY_WORLD_SID_AUTHORITY; |
| 132 | SID_IDENTIFIER_AUTHORITY siaCreator = SECURITY_CREATOR_SID_AUTHORITY; |
| 133 | BOOL fSuccess = FALSE; |
| 134 | #endif |
| 135 | |
| 136 | // |
| 137 | // allocate memory for the SID and get it |
| 138 | // |
| 139 | psid = static_cast<PSID>(MemAlloc(cbSid, TRUE)); |
| 140 | AclExitOnNull(psid, hr, E_OUTOFMEMORY, "failed allocate memory for well known SID"); |
| 141 | |
| 142 | #if(_WIN32_WINNT < 0x0501) |
| 143 | switch (wkst) |
| 144 | { |
| 145 | case WinWorldSid: // Everyone |
| 146 | fSuccess = ::AllocateAndInitializeSid(&siaWorld, 1, SECURITY_WORLD_RID, 0, 0, 0, 0, 0, 0, 0, &psidTemp); |
| 147 | break; |
| 148 | case WinAuthenticatedUserSid: // Authenticated Users |
| 149 | fSuccess = ::AllocateAndInitializeSid(&siaNT, 1, SECURITY_AUTHENTICATED_USER_RID, 0, 0, 0, 0, 0, 0, 0, &psidTemp); |
| 150 | break; |
| 151 | case WinLocalSystemSid: // LocalSystem |
| 152 | fSuccess = ::AllocateAndInitializeSid(&siaNT, 1, SECURITY_LOCAL_SYSTEM_RID, 0, 0, 0, 0, 0, 0, 0, &psidTemp); |
| 153 | break; |
| 154 | case WinLocalServiceSid: // LocalService |
| 155 | fSuccess = ::AllocateAndInitializeSid(&siaNT, 1, SECURITY_LOCAL_SERVICE_RID, 0, 0, 0, 0, 0, 0, 0, &psidTemp); |
| 156 | break; |
| 157 | case WinNetworkServiceSid: // NetworkService |
| 158 | fSuccess = ::AllocateAndInitializeSid(&siaNT, 1, SECURITY_NETWORK_SERVICE_RID, 0, 0, 0, 0, 0, 0, 0, &psidTemp); |
| 159 | break; |
| 160 | case WinBuiltinGuestsSid: // Guests |
| 161 | fSuccess = ::AllocateAndInitializeSid(&siaNT, 2, SECURITY_BUILTIN_DOMAIN_RID, DOMAIN_ALIAS_RID_GUESTS, 0, 0, 0, 0, 0, 0, &psidTemp); |
| 162 | break; |
| 163 | case WinBuiltinAdministratorsSid: // Administrators |
| 164 | fSuccess = ::AllocateAndInitializeSid(&siaNT, 2, SECURITY_BUILTIN_DOMAIN_RID, DOMAIN_ALIAS_RID_ADMINS, 0, 0, 0, 0, 0, 0, &psidTemp); |
| 165 | break; |
| 166 | case WinBuiltinUsersSid: // Users |
| 167 | fSuccess = ::AllocateAndInitializeSid(&siaNT, 2, SECURITY_BUILTIN_DOMAIN_RID, DOMAIN_ALIAS_RID_USERS, 0, 0, 0, 0, 0, 0, &psidTemp); |
| 168 | break; |
| 169 | case WinCreatorOwnerSid: //CREATOR OWNER |
| 170 | fSuccess = ::AllocateAndInitializeSid(&siaCreator, 1, SECURITY_CREATOR_OWNER_RID, 0, 0, 0, 0, 0, 0, 0, &psidTemp); |
| 171 | break; |
| 172 | case WinInteractiveSid: // INTERACTIVE |
| 173 | fSuccess = ::AllocateAndInitializeSid(&siaNT, 1, SECURITY_INTERACTIVE_RID, 0, 0, 0, 0, 0, 0, 0, &psidTemp); |
| 174 | break; |
| 175 | default: |
| 176 | hr = E_INVALIDARG; |
| 177 | AclExitOnFailure(hr, "unknown well known SID: %d", wkst); |
| 178 | } |
| 179 | |
| 180 | if (!fSuccess) |
| 181 | AclExitOnLastError(hr, "failed to allocate well known SID: %d", wkst); |
| 182 | |
| 183 | if (!::CopySid(cbSid, psid, psidTemp)) |
| 184 | AclExitOnLastError(hr, "failed to create well known SID: %d", wkst); |
| 185 | #else |
| 186 | Assert(NULL == psidTemp); |
| 187 | if (!::CreateWellKnownSid(wkst, NULL, psid, &cbSid)) |
| 188 | { |
| 189 | AclExitWithLastError(hr, "failed to create well known SID: %d", wkst); |
| 190 | } |
| 191 | #endif |
| 192 | |
| 193 | *ppsid = psid; |
| 194 | psid = NULL; // null it here so it won't be released below |
| 195 | |
| 196 | Assert(S_OK == hr && ::IsValidSid(*ppsid)); |
| 197 | LExit: |
| 198 | if (psidTemp) |
| 199 | { |
| 200 | ::FreeSid(psidTemp); |
| 201 | } |
| 202 | |
| 203 | ReleaseMem(psid); |
| 204 | |
| 205 | return hr; |
| 206 | } |
| 207 | |
| 208 | |
| 209 | /******************************************************************** |
| 210 | AclGetAccountSid - returns a SID for the specified account |
| 211 | |
| 212 | ********************************************************************/ |
| 213 | extern "C" HRESULT DAPI AclGetAccountSid( |
| 214 | __in_opt LPCWSTR wzSystem, |
| 215 | __in_z LPCWSTR wzAccount, |
| 216 | __deref_out PSID* ppsid |
| 217 | ) |
| 218 | { |
| 219 | Assert(wzAccount && *wzAccount && ppsid); |
| 220 | |
| 221 | HRESULT hr = S_OK; |
| 222 | UINT er = ERROR_SUCCESS; |
| 223 | PSID psid = NULL; |
| 224 | DWORD cbSid = SECURITY_MAX_SID_SIZE; |
| 225 | LPWSTR pwzDomainName = NULL; |
| 226 | DWORD cbDomainName = 255; |
| 227 | SID_NAME_USE peUse; |
| 228 | |
| 229 | // |
| 230 | // allocate memory for the SID and domain name |
| 231 | // |
| 232 | psid = static_cast<PSID>(MemAlloc(cbSid, TRUE)); |
| 233 | AclExitOnNull(psid, hr, E_OUTOFMEMORY, "failed to allocate memory for SID"); |
| 234 | hr = StrAlloc(&pwzDomainName, cbDomainName); |
| 235 | AclExitOnFailure(hr, "failed to allocate string for domain name"); |
| 236 | |
| 237 | // |
| 238 | // try to lookup the account now |
| 239 | // |
| 240 | if (!::LookupAccountNameW(wzSystem, wzAccount, psid, &cbSid, pwzDomainName, &cbDomainName, &peUse)) |
| 241 | { |
| 242 | // if one of the buffers wasn't large enough |
| 243 | er = ::GetLastError(); |
| 244 | if (ERROR_INSUFFICIENT_BUFFER == er) |
| 245 | { |
| 246 | if (SECURITY_MAX_SID_SIZE < cbSid) |
| 247 | { |
| 248 | PSID psidNew = static_cast<PSID>(MemReAlloc(psid, cbSid, TRUE)); |
| 249 | AclExitOnNullWithLastError(psidNew, hr, "failed to allocate memory for account: %ls", wzAccount); |
| 250 | |
| 251 | psid = psidNew; |
| 252 | } |
| 253 | if (255 < cbDomainName) |
| 254 | { |
| 255 | hr = StrAlloc(&pwzDomainName, cbDomainName); |
| 256 | AclExitOnFailure(hr, "failed to allocate string for domain name"); |
| 257 | } |
| 258 | |
| 259 | if (!::LookupAccountNameW(wzSystem, wzAccount, psid, &cbSid, pwzDomainName, &cbDomainName, &peUse)) |
| 260 | { |
| 261 | AclExitWithLastError(hr, "failed to lookup account: %ls", wzAccount); |
| 262 | } |
| 263 | } |
| 264 | else |
| 265 | { |
| 266 | AclExitOnWin32Error(er, hr, "failed to lookup account: %ls", wzAccount); |
| 267 | } |
| 268 | } |
| 269 | |
| 270 | *ppsid = psid; |
| 271 | psid = NULL; |
| 272 | |
| 273 | hr = S_OK; |
| 274 | LExit: |
| 275 | ReleaseStr(pwzDomainName); |
| 276 | ReleaseMem(psid); |
| 277 | |
| 278 | return hr; |
| 279 | } |
| 280 | |
| 281 | |
| 282 | /******************************************************************** |
| 283 | AclGetAccountSidString - gets a string version of the user's SID |
| 284 | |
| 285 | NOTE: ppwzSid should be freed with StrFree() |
| 286 | ********************************************************************/ |
| 287 | extern "C" HRESULT DAPI AclGetAccountSidString( |
| 288 | __in_z LPCWSTR wzSystem, |
| 289 | __in_z LPCWSTR wzAccount, |
| 290 | __deref_out_z LPWSTR* ppwzSid |
| 291 | ) |
| 292 | { |
| 293 | Assert(ppwzSid); |
| 294 | HRESULT hr = S_OK; |
| 295 | PSID psid = NULL; |
| 296 | LPWSTR pwz = NULL; |
| 297 | |
| 298 | *ppwzSid = NULL; |
| 299 | |
| 300 | hr = AclGetAccountSid(wzSystem, wzAccount, &psid); |
| 301 | AclExitOnFailure(hr, "failed to get SID for account: %ls", wzAccount); |
| 302 | Assert(::IsValidSid(psid)); |
| 303 | |
| 304 | if (!::ConvertSidToStringSidW(psid, &pwz)) |
| 305 | { |
| 306 | AclExitWithLastError(hr, "failed to convert SID to string for Account: %ls", wzAccount); |
| 307 | } |
| 308 | |
| 309 | hr = StrAllocString(ppwzSid, pwz, 0); |
| 310 | |
| 311 | LExit: |
| 312 | if (FAILED(hr)) |
| 313 | { |
| 314 | ReleaseNullStr(*ppwzSid); |
| 315 | } |
| 316 | |
| 317 | if (pwz) |
| 318 | { |
| 319 | ::LocalFree(pwz); |
| 320 | } |
| 321 | |
| 322 | if (psid) |
| 323 | { |
| 324 | AclFreeSid(psid); |
| 325 | } |
| 326 | |
| 327 | return hr; |
| 328 | } |
| 329 | |
| 330 | |
| 331 | /******************************************************************** |
| 332 | AclCreateDacl - creates a DACL from ACL_ACE structures |
| 333 | |
| 334 | ********************************************************************/ |
| 335 | extern "C" HRESULT DAPI AclCreateDacl( |
| 336 | __in_ecount(cDeny) ACL_ACE rgaaDeny[], |
| 337 | __in DWORD cDeny, |
| 338 | __in_ecount(cAllow) ACL_ACE rgaaAllow[], |
| 339 | __in DWORD cAllow, |
| 340 | __deref_out ACL** ppAcl |
| 341 | ) |
| 342 | { |
| 343 | Assert(ppAcl); |
| 344 | HRESULT hr = S_OK; |
| 345 | ACL* pAcl = NULL; |
| 346 | DWORD cbAcl = 0; |
| 347 | DWORD i; |
| 348 | |
| 349 | *ppAcl = NULL; |
| 350 | |
| 351 | // initialize the ACL |
| 352 | cbAcl = sizeof(ACL); |
| 353 | for (i = 0; i < cDeny; ++i) |
| 354 | { |
| 355 | cbAcl += sizeof(ACCESS_DENIED_ACE) + ::GetLengthSid(rgaaDeny[i].psid) - sizeof(DWORD); |
| 356 | } |
| 357 | |
| 358 | for (i = 0; i < cAllow; ++i) |
| 359 | { |
| 360 | cbAcl += sizeof(ACCESS_ALLOWED_ACE) + ::GetLengthSid(rgaaAllow[i].psid) - sizeof(DWORD); |
| 361 | } |
| 362 | |
| 363 | pAcl = static_cast<ACL*>(MemAlloc(cbAcl, TRUE)); |
| 364 | AclExitOnNull(pAcl, hr, E_OUTOFMEMORY, "failed to allocate ACL"); |
| 365 | |
| 366 | #pragma prefast(push) |
| 367 | #pragma prefast(disable:25029) |
| 368 | if (!::InitializeAcl(pAcl, cbAcl, ACL_REVISION)) |
| 369 | #pragma prefast(pop) |
| 370 | { |
| 371 | AclExitWithLastError(hr, "failed to initialize ACL"); |
| 372 | } |
| 373 | |
| 374 | // add in the ACEs (denied first) |
| 375 | for (i = 0; i < cDeny; ++i) |
| 376 | { |
| 377 | #pragma prefast(push) |
| 378 | #pragma prefast(disable:25029) |
| 379 | if (!::AddAccessDeniedAceEx(pAcl, ACL_REVISION, rgaaDeny[i].dwFlags, rgaaDeny[i].dwMask, rgaaDeny[i].psid)) |
| 380 | #pragma prefast(pop) |
| 381 | { |
| 382 | AclExitWithLastError(hr, "failed to add access denied ACE #%d to ACL", i); |
| 383 | } |
| 384 | } |
| 385 | for (i = 0; i < cAllow; ++i) |
| 386 | { |
| 387 | #pragma prefast(push) |
| 388 | #pragma prefast(disable:25029) |
| 389 | if (!::AddAccessAllowedAceEx(pAcl, ACL_REVISION, rgaaAllow[i].dwFlags, rgaaAllow[i].dwMask, rgaaAllow[i].psid)) |
| 390 | #pragma prefast(pop) |
| 391 | { |
| 392 | AclExitWithLastError(hr, "failed to add access allowed ACE #%d to ACL", i); |
| 393 | } |
| 394 | } |
| 395 | |
| 396 | *ppAcl = pAcl; |
| 397 | pAcl = NULL; |
| 398 | AssertSz(::IsValidAcl(*ppAcl), "AclCreateDacl() - created invalid ACL"); |
| 399 | Assert(S_OK == hr); |
| 400 | LExit: |
| 401 | if (pAcl) |
| 402 | { |
| 403 | AclFreeDacl(pAcl); |
| 404 | } |
| 405 | |
| 406 | return hr; |
| 407 | } |
| 408 | |
| 409 | |
| 410 | /******************************************************************** |
| 411 | AclAddToDacl - creates a new DACL from an ACL plus new ACL_ACE structure |
| 412 | |
| 413 | ********************************************************************/ |
| 414 | extern "C" HRESULT DAPI AclAddToDacl( |
| 415 | __in ACL* pAcl, |
| 416 | __in_ecount_opt(cDeny) const ACL_ACE rgaaDeny[], |
| 417 | __in DWORD cDeny, |
| 418 | __in_ecount_opt(cAllow) const ACL_ACE rgaaAllow[], |
| 419 | __in DWORD cAllow, |
| 420 | __deref_out ACL** ppAclNew |
| 421 | ) |
| 422 | { |
| 423 | Assert(pAcl && ::IsValidAcl(pAcl) && ppAclNew); |
| 424 | HRESULT hr = S_OK; |
| 425 | |
| 426 | ACL_SIZE_INFORMATION asi; |
| 427 | ACL_ACE* paaNewDeny = NULL; |
| 428 | DWORD cNewDeny = 0; |
| 429 | ACL_ACE* paaNewAllow = NULL; |
| 430 | DWORD cNewAllow = 0; |
| 431 | |
| 432 | ACCESS_ALLOWED_ACE* paaa; |
| 433 | ACCESS_DENIED_ACE* pada; |
| 434 | DWORD i; |
| 435 | |
| 436 | // allocate memory for all the new ACEs (NOTE: this over calculates the memory necessary, but that's okay) |
| 437 | if (!::GetAclInformation(pAcl, &asi, sizeof(asi), AclSizeInformation)) |
| 438 | { |
| 439 | AclExitWithLastError(hr, "failed to get information about original ACL"); |
| 440 | } |
| 441 | |
| 442 | if ((asi.AceCount + cDeny) < asi.AceCount || // check for overflow |
| 443 | (asi.AceCount + cDeny) < cDeny || // check for overflow |
| 444 | (asi.AceCount + cDeny) >= MAXSIZE_T / sizeof(ACL_ACE)) |
| 445 | { |
| 446 | hr = E_OUTOFMEMORY; |
| 447 | AclExitOnFailure(hr, "Not enough memory to allocate %d ACEs", (asi.AceCount + cDeny)); |
| 448 | } |
| 449 | |
| 450 | paaNewDeny = static_cast<ACL_ACE*>(MemAlloc(sizeof(ACL_ACE) * (asi.AceCount + cDeny), TRUE)); |
| 451 | AclExitOnNull(paaNewDeny, hr, E_OUTOFMEMORY, "failed to allocate memory for new deny ACEs"); |
| 452 | |
| 453 | if ((asi.AceCount + cAllow) < asi.AceCount || // check for overflow |
| 454 | (asi.AceCount + cAllow) < cAllow || // check for overflow |
| 455 | (asi.AceCount + cAllow) >= MAXSIZE_T / sizeof(ACL_ACE)) |
| 456 | { |
| 457 | hr = E_OUTOFMEMORY; |
| 458 | AclExitOnFailure(hr, "Not enough memory to allocate %d ACEs", (asi.AceCount + cAllow)); |
| 459 | } |
| 460 | |
| 461 | paaNewAllow = static_cast<ACL_ACE*>(MemAlloc(sizeof(ACL_ACE) * (asi.AceCount + cAllow), TRUE)); |
| 462 | AclExitOnNull(paaNewAllow, hr, E_OUTOFMEMORY, "failed to allocate memory for new allow ACEs"); |
| 463 | |
| 464 | // fill in the new structures with old data then new data (denied first) |
| 465 | for (i = 0; i < asi.AceCount; ++i) |
| 466 | { |
| 467 | if (!::GetAce(pAcl, i, reinterpret_cast<LPVOID*>(&pada))) |
| 468 | { |
| 469 | AclExitWithLastError(hr, "failed to get ACE #%d from ACL", i); |
| 470 | } |
| 471 | |
| 472 | if (ACCESS_DENIED_ACE_TYPE != pada->Header.AceType) |
| 473 | { |
| 474 | continue; // skip non-denied aces |
| 475 | } |
| 476 | |
| 477 | paaNewDeny[i].dwFlags = pada->Header.AceFlags; |
| 478 | paaNewDeny[i].dwMask = pada->Mask; |
| 479 | paaNewDeny[i].psid = reinterpret_cast<PSID>(&(pada->SidStart)); |
| 480 | ++cNewDeny; |
| 481 | } |
| 482 | |
| 483 | memcpy(paaNewDeny + cNewDeny, rgaaDeny, sizeof(ACL_ACE) * cDeny); |
| 484 | cNewDeny += cDeny; |
| 485 | |
| 486 | |
| 487 | for (i = 0; i < asi.AceCount; ++i) |
| 488 | { |
| 489 | if (!::GetAce(pAcl, i, reinterpret_cast<LPVOID*>(&paaa))) |
| 490 | { |
| 491 | AclExitWithLastError(hr, "failed to get ACE #%d from ACL", i); |
| 492 | } |
| 493 | |
| 494 | if (ACCESS_ALLOWED_ACE_TYPE != paaa->Header.AceType) |
| 495 | { |
| 496 | continue; // skip non-allowed aces |
| 497 | } |
| 498 | |
| 499 | paaNewAllow[i].dwFlags = paaa->Header.AceFlags; |
| 500 | paaNewAllow[i].dwMask = paaa->Mask; |
| 501 | paaNewAllow[i].psid = reinterpret_cast<PSID>(&(paaa->SidStart)); |
| 502 | ++cNewAllow; |
| 503 | } |
| 504 | |
| 505 | memcpy(paaNewAllow + cNewAllow, rgaaAllow, sizeof(ACL_ACE) * cAllow); |
| 506 | cNewAllow += cAllow; |
| 507 | |
| 508 | // create the dacl with the new |
| 509 | hr = AclCreateDacl(paaNewDeny, cNewDeny, paaNewAllow, cNewAllow, ppAclNew); |
| 510 | AclExitOnFailure(hr, "failed to create new ACL from existing ACL"); |
| 511 | |
| 512 | AssertSz(::IsValidAcl(*ppAclNew), "AclAddToDacl() - created invalid ACL"); |
| 513 | Assert(S_OK == hr); |
| 514 | LExit: |
| 515 | ReleaseMem(paaNewAllow); |
| 516 | ReleaseMem(paaNewDeny); |
| 517 | |
| 518 | return hr; |
| 519 | } |
| 520 | |
| 521 | |
| 522 | /******************************************************************** |
| 523 | AclMergeDacls - creates a new DACL from two existing ACLs |
| 524 | |
| 525 | ********************************************************************/ |
| 526 | extern "C" HRESULT DAPI AclMergeDacls( |
| 527 | __in const ACL* pAcl1, |
| 528 | __in const ACL* pAcl2, |
| 529 | __deref_out ACL** ppAclNew |
| 530 | ) |
| 531 | { |
| 532 | HRESULT hr = E_NOTIMPL; |
| 533 | |
| 534 | Assert(pAcl1 && pAcl2 && ppAclNew); |
| 535 | UNREFERENCED_PARAMETER(pAcl1); |
| 536 | UNREFERENCED_PARAMETER(pAcl2); |
| 537 | UNREFERENCED_PARAMETER(ppAclNew); |
| 538 | |
| 539 | //LExit: |
| 540 | return hr; |
| 541 | } |
| 542 | |
| 543 | |
| 544 | /******************************************************************** |
| 545 | AclCreateDaclOld - creates a DACL from an ACL_ACCESS structure |
| 546 | |
| 547 | ********************************************************************/ |
| 548 | extern "C" HRESULT DAPI AclCreateDaclOld( |
| 549 | __in_ecount(cAclAccesses) ACL_ACCESS* paa, |
| 550 | __in DWORD cAclAccesses, |
| 551 | __deref_out ACL** ppACL |
| 552 | ) |
| 553 | { |
| 554 | Assert(ppACL); |
| 555 | HRESULT hr = S_OK; |
| 556 | DWORD* pdwAccessMask = NULL; |
| 557 | PSID* ppsid = NULL; |
| 558 | |
| 559 | DWORD i; |
| 560 | int cbAcl; |
| 561 | |
| 562 | *ppACL = NULL; |
| 563 | |
| 564 | // |
| 565 | // create the SIDs and calculate the space for the ACL |
| 566 | // |
| 567 | pdwAccessMask = static_cast<DWORD*>(MemAlloc(sizeof(DWORD) * cAclAccesses, TRUE)); |
| 568 | AclExitOnNull(pdwAccessMask, hr, E_OUTOFMEMORY, "failed allocate memory for access mask"); |
| 569 | ppsid = static_cast<PSID*>(MemAlloc(sizeof(PSID) * cAclAccesses, TRUE)); |
| 570 | AclExitOnNull(ppsid, hr, E_OUTOFMEMORY, "failed allocate memory for sid"); |
| 571 | |
| 572 | cbAcl = sizeof (ACL); // start with the size of the header |
| 573 | for (i = 0; i < cAclAccesses; ++i) |
| 574 | { |
| 575 | if (paa[i].pwzAccountName) |
| 576 | { |
| 577 | hr = AclGetAccountSid(NULL, paa[i].pwzAccountName, ppsid + i); |
| 578 | AclExitOnFailure(hr, "failed to get SID for account: %ls", paa[i].pwzAccountName); |
| 579 | } |
| 580 | else |
| 581 | { |
| 582 | if ((!::AllocateAndInitializeSid(&paa[i].sia, paa[i].nSubAuthorityCount, |
| 583 | paa[i].nSubAuthority[0], paa[i].nSubAuthority[1], |
| 584 | paa[i].nSubAuthority[2], paa[i].nSubAuthority[3], |
| 585 | paa[i].nSubAuthority[4], paa[i].nSubAuthority[5], |
| 586 | paa[i].nSubAuthority[6], paa[i].nSubAuthority[7], |
| 587 | (void**)(ppsid + i)))) |
| 588 | { |
| 589 | AclExitWithLastError(hr, "failed to initialize SIDs #%u", i); |
| 590 | } |
| 591 | } |
| 592 | |
| 593 | // add the newly allocated SID size to the count of bytes for this ACL |
| 594 | cbAcl +=::GetLengthSid(*(ppsid + i)) - sizeof(DWORD); |
| 595 | if (paa[i].fDenyAccess) |
| 596 | { |
| 597 | cbAcl += sizeof(ACCESS_DENIED_ACE); |
| 598 | } |
| 599 | else |
| 600 | { |
| 601 | cbAcl += sizeof(ACCESS_ALLOWED_ACE); |
| 602 | } |
| 603 | |
| 604 | pdwAccessMask[i] = paa[i].dwAccessMask; |
| 605 | } |
| 606 | |
| 607 | // |
| 608 | // allocate the ACL and set the appropriate ACEs |
| 609 | // |
| 610 | *ppACL = static_cast<ACL*>(MemAlloc(cbAcl, FALSE)); |
| 611 | AclExitOnNull(*ppACL, hr, E_OUTOFMEMORY, "failed allocate memory for ACL"); |
| 612 | |
| 613 | #pragma prefast(push) |
| 614 | #pragma prefast(disable:25029) |
| 615 | if (!::InitializeAcl(*ppACL, cbAcl, ACL_REVISION)) |
| 616 | #pragma prefast(pop) |
| 617 | { |
| 618 | AclExitWithLastError(hr, "failed to initialize ACLs"); |
| 619 | } |
| 620 | |
| 621 | // add an access-allowed ACE for each of the SIDs |
| 622 | for (i = 0; i < cAclAccesses; ++i) |
| 623 | { |
| 624 | if (paa[i].fDenyAccess) |
| 625 | { |
| 626 | #pragma prefast(push) |
| 627 | #pragma prefast(disable:25029) |
| 628 | if (!::AddAccessDeniedAceEx(*ppACL, ACL_REVISION, CONTAINER_INHERIT_ACE | OBJECT_INHERIT_ACE, pdwAccessMask[i], *(ppsid + i))) |
| 629 | #pragma prefast(pop) |
| 630 | { |
| 631 | AclExitWithLastError(hr, "failed to add access denied for ACE"); |
| 632 | } |
| 633 | } |
| 634 | else |
| 635 | { |
| 636 | #pragma prefast(push) |
| 637 | #pragma prefast(disable:25029) |
| 638 | if (!::AddAccessAllowedAceEx(*ppACL, ACL_REVISION, CONTAINER_INHERIT_ACE | OBJECT_INHERIT_ACE, pdwAccessMask[i], *(ppsid + i))) |
| 639 | #pragma prefast(pop) |
| 640 | { |
| 641 | AclExitWithLastError(hr, "failed to add access allowed for ACE"); |
| 642 | } |
| 643 | } |
| 644 | } |
| 645 | |
| 646 | LExit: |
| 647 | if (FAILED(hr)) |
| 648 | { |
| 649 | ReleaseNullMem(*ppACL); |
| 650 | } |
| 651 | |
| 652 | if (ppsid) |
| 653 | { |
| 654 | for (i = 0; i < cAclAccesses; ++i) |
| 655 | { |
| 656 | if (ppsid[i]) |
| 657 | { |
| 658 | ::FreeSid(ppsid[i]); |
| 659 | } |
| 660 | } |
| 661 | |
| 662 | MemFree(ppsid); |
| 663 | } |
| 664 | |
| 665 | ReleaseMem(pdwAccessMask); |
| 666 | |
| 667 | return hr; |
| 668 | } |
| 669 | |
| 670 | |
| 671 | /******************************************************************** |
| 672 | AclCreateSecurityDescriptorFromDacl - creates a self-relative security |
| 673 | descriptor from an existing DACL |
| 674 | |
| 675 | ********************************************************************/ |
| 676 | extern "C" HRESULT DAPI AclCreateSecurityDescriptorFromDacl( |
| 677 | __in ACL* pACL, |
| 678 | __deref_out SECURITY_DESCRIPTOR** ppsd |
| 679 | ) |
| 680 | { |
| 681 | HRESULT hr = S_OK; |
| 682 | |
| 683 | SECURITY_DESCRIPTOR sd; |
| 684 | DWORD cbSD; |
| 685 | |
| 686 | AclExitOnNull(pACL, hr, E_INVALIDARG, "Failed to create security descriptor from DACL, because no DACL was provided"); |
| 687 | AclExitOnNull(ppsd, hr, E_INVALIDARG, "Failed to create security descriptor from DACL, because no output object was provided"); |
| 688 | |
| 689 | *ppsd = NULL; |
| 690 | |
| 691 | // |
| 692 | // create the absolute security descriptor |
| 693 | // |
| 694 | |
| 695 | // initialize our security descriptor, throw the ACL into it, and set the owner |
| 696 | #pragma prefast(push) |
| 697 | #pragma prefast(disable:25028) // We only call this when pACL isn't NULL, so this call is safe according to the docs |
| 698 | #pragma prefast(disable:25029) |
| 699 | if (!::InitializeSecurityDescriptor(&sd, SECURITY_DESCRIPTOR_REVISION) || |
| 700 | (!::SetSecurityDescriptorDacl(&sd, TRUE, pACL, FALSE)) || |
| 701 | (!::SetSecurityDescriptorOwner(&sd, NULL, FALSE))) |
| 702 | #pragma prefast(pop) |
| 703 | { |
| 704 | AclExitWithLastError(hr, "failed to initialize security descriptor"); |
| 705 | } |
| 706 | |
| 707 | // |
| 708 | // create the self-relative security descriptor |
| 709 | // |
| 710 | cbSD = ::GetSecurityDescriptorLength(&sd); |
| 711 | *ppsd = static_cast<SECURITY_DESCRIPTOR*>(MemAlloc(cbSD, FALSE)); |
| 712 | AclExitOnNull(*ppsd, hr, E_OUTOFMEMORY, "failed allocate memory for security descriptor"); |
| 713 | |
| 714 | ::MakeSelfRelativeSD(&sd, (BYTE*)*ppsd, &cbSD); |
| 715 | Assert(::IsValidSecurityDescriptor(*ppsd)); |
| 716 | |
| 717 | LExit: |
| 718 | if (FAILED(hr) && NULL != ppsd && NULL != *ppsd) |
| 719 | { |
| 720 | MemFree(*ppsd); |
| 721 | *ppsd = NULL; |
| 722 | } |
| 723 | |
| 724 | return hr; |
| 725 | } |
| 726 | |
| 727 | |
| 728 | /******************************************************************** |
| 729 | AclCreateSecurityDescriptor - creates a self-relative security descriptor from an |
| 730 | ACL_ACCESS structure |
| 731 | |
| 732 | NOTE: ppsd should be freed with AclFreeSecurityDescriptor() |
| 733 | ********************************************************************/ |
| 734 | extern "C" HRESULT DAPI AclCreateSecurityDescriptor( |
| 735 | __in_ecount(cAclAccesses) ACL_ACCESS* paa, |
| 736 | __in DWORD cAclAccesses, |
| 737 | __deref_out SECURITY_DESCRIPTOR** ppsd |
| 738 | ) |
| 739 | { |
| 740 | Assert(ppsd); |
| 741 | HRESULT hr = S_OK; |
| 742 | |
| 743 | ACL* pACL; |
| 744 | |
| 745 | *ppsd = NULL; |
| 746 | |
| 747 | // |
| 748 | // create the DACL |
| 749 | // |
| 750 | hr = AclCreateDaclOld(paa, cAclAccesses, &pACL); |
| 751 | AclExitOnFailure(hr, "failed to create DACL for security descriptor"); |
| 752 | |
| 753 | // |
| 754 | // create self-relative security descriptor |
| 755 | // |
| 756 | hr = AclCreateSecurityDescriptorFromDacl(pACL, ppsd); |
| 757 | |
| 758 | LExit: |
| 759 | return hr; |
| 760 | } |
| 761 | |
| 762 | |
| 763 | /******************************************************************** |
| 764 | AclCreateSecurityDescriptorFromString - creates a self-relative security |
| 765 | descriptor from an SDDL string |
| 766 | |
| 767 | NOTE: ppsd should be freed with AclFreeSecurityDescriptor() |
| 768 | ********************************************************************/ |
| 769 | extern "C" HRESULT DAPI AclCreateSecurityDescriptorFromString( |
| 770 | __deref_out SECURITY_DESCRIPTOR** ppsd, |
| 771 | __in_z __format_string LPCWSTR wzSddlFormat, |
| 772 | ... |
| 773 | ) |
| 774 | { |
| 775 | Assert(ppsd); |
| 776 | HRESULT hr = S_OK; |
| 777 | LPWSTR pwzSddl = NULL; |
| 778 | va_list args; |
| 779 | PSECURITY_DESCRIPTOR psd = NULL; |
| 780 | DWORD cbSD = 0; |
| 781 | |
| 782 | *ppsd = NULL; |
| 783 | |
| 784 | va_start(args, wzSddlFormat); |
| 785 | hr = StrAllocFormattedArgs(&pwzSddl, wzSddlFormat, args); |
| 786 | va_end(args); |
| 787 | AclExitOnFailure(hr, "failed to create SDDL string for format: %ls", wzSddlFormat); |
| 788 | |
| 789 | if (!::ConvertStringSecurityDescriptorToSecurityDescriptorW(pwzSddl, SDDL_REVISION_1, &psd, &cbSD)) |
| 790 | { |
| 791 | AclExitWithLastError(hr, "failed to create security descriptor from SDDL: %ls", pwzSddl); |
| 792 | } |
| 793 | |
| 794 | *ppsd = static_cast<SECURITY_DESCRIPTOR*>(MemAlloc(cbSD, FALSE)); |
| 795 | AclExitOnNull(*ppsd, hr, E_OUTOFMEMORY, "failed to allocate memory for security descriptor"); |
| 796 | |
| 797 | memcpy(*ppsd, psd, cbSD); |
| 798 | Assert(::IsValidSecurityDescriptor(*ppsd)); |
| 799 | |
| 800 | Assert(S_OK == hr); |
| 801 | |
| 802 | LExit: |
| 803 | if (FAILED(hr) && NULL != ppsd && NULL != *ppsd) |
| 804 | { |
| 805 | MemFree(*ppsd); |
| 806 | *ppsd = NULL; |
| 807 | } |
| 808 | |
| 809 | if (psd) |
| 810 | { |
| 811 | ::LocalFree(psd); |
| 812 | } |
| 813 | |
| 814 | ReleaseStr(pwzSddl); |
| 815 | return hr; |
| 816 | } |
| 817 | |
| 818 | |
| 819 | /******************************************************************** |
| 820 | AclDuplicateSecurityDescriptor - creates a copy of a self-relative security descriptor |
| 821 | |
| 822 | NOTE: passed in security descriptor must be in self-relative format |
| 823 | ********************************************************************/ |
| 824 | extern "C" HRESULT DAPI AclDuplicateSecurityDescriptor( |
| 825 | __in SECURITY_DESCRIPTOR* psd, |
| 826 | __deref_out SECURITY_DESCRIPTOR** ppsd |
| 827 | ) |
| 828 | { |
| 829 | HRESULT hr = S_OK; |
| 830 | DWORD cbSD; |
| 831 | |
| 832 | AclExitOnNull(ppsd, hr, E_INVALIDARG, "Failed to get duplicate ACL security descriptor because no place to output was provided"); |
| 833 | *ppsd = NULL; |
| 834 | |
| 835 | // |
| 836 | // create the self-relative security descriptor |
| 837 | // |
| 838 | cbSD = ::GetSecurityDescriptorLength(psd); |
| 839 | *ppsd = static_cast<SECURITY_DESCRIPTOR*>(MemAlloc(cbSD, 0)); |
| 840 | AclExitOnNull(*ppsd, hr, E_OUTOFMEMORY, "failed allocate memory for security descriptor"); |
| 841 | |
| 842 | memcpy(*ppsd, psd, cbSD); |
| 843 | Assert(::IsValidSecurityDescriptor(*ppsd)); |
| 844 | |
| 845 | LExit: |
| 846 | if (FAILED(hr) && NULL != ppsd && NULL != *ppsd) |
| 847 | { |
| 848 | MemFree(*ppsd); |
| 849 | *ppsd = NULL; |
| 850 | } |
| 851 | |
| 852 | return hr; |
| 853 | } |
| 854 | |
| 855 | |
| 856 | /******************************************************************** |
| 857 | AclGetSecurityDescriptor - returns self-relative security descriptor for named object |
| 858 | |
| 859 | NOTE: free ppsd with AclFreeSecurityDescriptor() |
| 860 | ********************************************************************/ |
| 861 | extern "C" HRESULT DAPI AclGetSecurityDescriptor( |
| 862 | __in_z LPCWSTR wzObject, |
| 863 | __in SE_OBJECT_TYPE sot, |
| 864 | __in SECURITY_INFORMATION securityInformation, |
| 865 | __deref_out SECURITY_DESCRIPTOR** ppsd |
| 866 | ) |
| 867 | { |
| 868 | HRESULT hr = S_OK; |
| 869 | DWORD er; |
| 870 | PSECURITY_DESCRIPTOR psd = NULL; |
| 871 | DWORD cbSD; |
| 872 | |
| 873 | AclExitOnNull(ppsd, hr, E_INVALIDARG, "Failed to get ACL Security Descriptor because no place to output was provided"); |
| 874 | *ppsd = NULL; |
| 875 | |
| 876 | // get the security descriptor for the object |
| 877 | er = ::GetNamedSecurityInfoW(const_cast<LPWSTR>(wzObject), sot, securityInformation, NULL, NULL, NULL, NULL, &psd); |
| 878 | AclExitOnWin32Error(er, hr, "failed to get security info from object: %ls", wzObject); |
| 879 | Assert(::IsValidSecurityDescriptor(psd)); |
| 880 | |
| 881 | // copy the self-relative security descriptor |
| 882 | cbSD = ::GetSecurityDescriptorLength(psd); |
| 883 | *ppsd = static_cast<SECURITY_DESCRIPTOR*>(MemAlloc(cbSD, 0)); |
| 884 | AclExitOnNull(*ppsd, hr, E_OUTOFMEMORY, "failed allocate memory for security descriptor"); |
| 885 | |
| 886 | memcpy(*ppsd, psd, cbSD); |
| 887 | Assert(::IsValidSecurityDescriptor(*ppsd)); |
| 888 | |
| 889 | LExit: |
| 890 | if (FAILED(hr) && NULL != ppsd && NULL != *ppsd) |
| 891 | { |
| 892 | MemFree(*ppsd); |
| 893 | *ppsd = NULL; |
| 894 | } |
| 895 | |
| 896 | if (psd) |
| 897 | { |
| 898 | ::LocalFree(psd); |
| 899 | } |
| 900 | |
| 901 | return hr; |
| 902 | } |
| 903 | |
| 904 | |
| 905 | extern "C" HRESULT DAPI AclSetSecurityWithRetry( |
| 906 | __in_z LPCWSTR wzObject, |
| 907 | __in SE_OBJECT_TYPE sot, |
| 908 | __in SECURITY_INFORMATION securityInformation, |
| 909 | __in_opt PSID psidOwner, |
| 910 | __in_opt PSID psidGroup, |
| 911 | __in_opt PACL pDacl, |
| 912 | __in_opt PACL pSacl, |
| 913 | __in DWORD cRetry, |
| 914 | __in DWORD dwWaitMilliseconds |
| 915 | ) |
| 916 | { |
| 917 | HRESULT hr = S_OK; |
| 918 | LPWSTR sczObject = NULL; |
| 919 | DWORD i = 0; |
| 920 | |
| 921 | hr = StrAllocString(&sczObject, wzObject, 0); |
| 922 | AclExitOnFailure(hr, "Failed to copy object to secure."); |
| 923 | |
| 924 | hr = E_FAIL; |
| 925 | for (i = 0; FAILED(hr) && i <= cRetry; ++i) |
| 926 | { |
| 927 | if (0 < i) |
| 928 | { |
| 929 | ::Sleep(dwWaitMilliseconds); |
| 930 | } |
| 931 | |
| 932 | DWORD er = ::SetNamedSecurityInfoW(sczObject, sot, securityInformation, psidOwner, psidGroup, pDacl, pSacl); |
| 933 | hr = HRESULT_FROM_WIN32(er); |
| 934 | } |
| 935 | AclExitOnRootFailure(hr, "Failed to set security on object '%ls' after %u retries.", wzObject, i); |
| 936 | |
| 937 | LExit: |
| 938 | ReleaseStr(sczObject); |
| 939 | |
| 940 | return hr; |
| 941 | } |
| 942 | |
| 943 | |
| 944 | /******************************************************************** |
| 945 | AclFreeSid - frees a SID created by any Acl* functions |
| 946 | |
| 947 | ********************************************************************/ |
| 948 | extern "C" HRESULT DAPI AclFreeSid( |
| 949 | __in PSID psid |
| 950 | ) |
| 951 | { |
| 952 | Assert(psid && ::IsValidSid(psid)); |
| 953 | HRESULT hr = S_OK; |
| 954 | |
| 955 | hr = MemFree(psid); |
| 956 | |
| 957 | return hr; |
| 958 | } |
| 959 | |
| 960 | |
| 961 | /******************************************************************** |
| 962 | AclFreeDacl - frees a DACL created by any Acl* functions |
| 963 | |
| 964 | ********************************************************************/ |
| 965 | extern "C" HRESULT DAPI AclFreeDacl( |
| 966 | __in ACL* pACL |
| 967 | ) |
| 968 | { |
| 969 | Assert(pACL); |
| 970 | HRESULT hr = S_OK; |
| 971 | |
| 972 | hr = MemFree(pACL); |
| 973 | |
| 974 | return hr; |
| 975 | } |
| 976 | |
| 977 | |
| 978 | /******************************************************************** |
| 979 | AclFreeSecurityDescriptor - frees a security descriptor created by any Acl* functions |
| 980 | |
| 981 | ********************************************************************/ |
| 982 | extern "C" HRESULT DAPI AclFreeSecurityDescriptor( |
| 983 | __in SECURITY_DESCRIPTOR* psd |
| 984 | ) |
| 985 | { |
| 986 | Assert(psd && ::IsValidSecurityDescriptor(psd)); |
| 987 | HRESULT hr = S_OK; |
| 988 | |
| 989 | hr = MemFree(psd); |
| 990 | |
| 991 | return hr; |
| 992 | } |
| 993 | |
| 994 | |
| 995 | /******************************************************************** |
| 996 | AclAddAdminToSecurityDescriptor - Adds the Administrators group to a security descriptor |
| 997 | |
| 998 | ********************************************************************/ |
| 999 | extern "C" HRESULT DAPI AclAddAdminToSecurityDescriptor( |
| 1000 | __in SECURITY_DESCRIPTOR* pSecurity, |
| 1001 | __deref_out SECURITY_DESCRIPTOR** ppSecurityNew |
| 1002 | ) |
| 1003 | { |
| 1004 | HRESULT hr = S_OK; |
| 1005 | PACL pAcl = NULL; |
| 1006 | PACL pAclNew = NULL; |
| 1007 | BOOL fValid, fDaclDefaulted; |
| 1008 | ACL_ACE ace[1]; |
| 1009 | SECURITY_DESCRIPTOR* pSecurityNew; |
| 1010 | |
| 1011 | if (!::GetSecurityDescriptorDacl(pSecurity, &fValid, &pAcl, &fDaclDefaulted) || !fValid) |
| 1012 | { |
| 1013 | AclExitOnLastError(hr, "Failed to get acl from security descriptor"); |
| 1014 | } |
| 1015 | |
| 1016 | hr = AclGetWellKnownSid(WinBuiltinAdministratorsSid, &ace[0].psid); |
| 1017 | AclExitOnFailure(hr, "failed to get sid for Administrators group"); |
| 1018 | |
| 1019 | ace[0].dwFlags = NO_PROPAGATE_INHERIT_ACE; |
| 1020 | ace[0].dwMask = GENERIC_ALL; |
| 1021 | |
| 1022 | hr = AclAddToDacl(pAcl, NULL, 0, ace, 1, &pAclNew); |
| 1023 | AclExitOnFailure(hr, "failed to add Administrators ACE to ACL"); |
| 1024 | |
| 1025 | hr = AclCreateSecurityDescriptorFromDacl(pAclNew, &pSecurityNew); |
| 1026 | AclExitOnLastError(hr, "Failed to create new security descriptor"); |
| 1027 | |
| 1028 | // The DACL is referenced by, not copied into, the security descriptor. Make sure not to free it. |
| 1029 | pAclNew = NULL; |
| 1030 | |
| 1031 | *ppSecurityNew = pSecurityNew; |
| 1032 | |
| 1033 | LExit: |
| 1034 | if (pAclNew) |
| 1035 | { |
| 1036 | AclFreeDacl(pAclNew); |
| 1037 | } |
| 1038 | if (ace[0].psid) |
| 1039 | { |
| 1040 | AclFreeSid(ace[0].psid); |
| 1041 | } |
| 1042 | |
| 1043 | return hr; |
| 1044 | } |