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| Rev | Author | Line No. | Line |
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| 68 | daniel-mar | 1 | (******************************************************************************) |
| 2 | (* SPGetSid - Retrieve the current user's SID in text format *) |
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| 3 | (* *) |
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| 4 | (* Copyright (c) 2004 Shorter Path Software *) |
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| 5 | (* http://www.shorterpath.com *) |
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| 6 | (******************************************************************************) |
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| 7 | |||
| 8 | |||
| 9 | { |
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| 10 | SID is a data structure of variable length that identifies user, group, |
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| 11 | and computer accounts. |
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| 12 | Every account on a network is issued a unique SID when the account is first created. |
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| 13 | Internal processes in Windows refer to an account's SID |
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| 14 | rather than the account's user or group name. |
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| 15 | } |
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| 16 | |||
| 17 | |||
| 18 | unit SPGetSid; |
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| 19 | |||
| 20 | interface |
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| 21 | |||
| 22 | uses |
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| 23 | Windows, SysUtils; |
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| 24 | |||
| 25 | function GetCurrentUserSid: string; |
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| 26 | |||
| 27 | implementation |
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| 28 | |||
| 29 | const |
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| 30 | HEAP_ZERO_MEMORY = $00000008; |
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| 31 | SID_REVISION = 1; // Current revision level |
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| 32 | |||
| 33 | type |
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| 34 | PTokenUser = ^TTokenUser; |
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| 35 | TTokenUser = packed record |
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| 36 | User: TSidAndAttributes; |
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| 37 | end; |
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| 38 | |||
| 39 | function ConvertSid(Sid: PSID; pszSidText: PChar; var dwBufferLen: DWORD): BOOL; |
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| 40 | var |
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| 41 | psia: PSIDIdentifierAuthority; |
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| 42 | dwSubAuthorities: DWORD; |
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| 43 | dwSidRev: DWORD; |
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| 44 | dwCounter: DWORD; |
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| 45 | dwSidSize: DWORD; |
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| 46 | begin |
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| 47 | Result := False; |
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| 48 | |||
| 49 | dwSidRev := SID_REVISION; |
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| 50 | |||
| 51 | if not IsValidSid(Sid) then Exit; |
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| 52 | |||
| 53 | psia := GetSidIdentifierAuthority(Sid); |
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| 54 | |||
| 55 | dwSubAuthorities := GetSidSubAuthorityCount(Sid)^; |
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| 56 | |||
| 57 | dwSidSize := (15 + 12 + (12 * dwSubAuthorities) + 1) * SizeOf(Char); |
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| 58 | |||
| 59 | if (dwBufferLen < dwSidSize) then |
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| 60 | begin |
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| 61 | dwBufferLen := dwSidSize; |
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| 62 | SetLastError(ERROR_INSUFFICIENT_BUFFER); |
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| 63 | Exit; |
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| 64 | end; |
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| 65 | |||
| 66 | StrFmt(pszSidText, 'S-%u-', [dwSidRev]); |
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| 67 | |||
| 68 | if (psia.Value[0] <> 0) or (psia.Value[1] <> 0) then |
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| 69 | StrFmt(pszSidText + StrLen(pszSidText), |
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| 70 | '0x%.2x%.2x%.2x%.2x%.2x%.2x', |
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| 71 | [psia.Value[0], psia.Value[1], psia.Value[2], |
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| 72 | psia.Value[3], psia.Value[4], psia.Value[5]]) |
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| 73 | else |
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| 74 | StrFmt(pszSidText + StrLen(pszSidText), |
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| 75 | '%u', |
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| 76 | [DWORD(psia.Value[5]) + |
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| 77 | DWORD(psia.Value[4] shl 8) + |
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| 78 | DWORD(psia.Value[3] shl 16) + |
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| 79 | DWORD(psia.Value[2] shl 24)]); |
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| 80 | |||
| 81 | dwSidSize := StrLen(pszSidText); |
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| 82 | |||
| 83 | for dwCounter := 0 to dwSubAuthorities - 1 do |
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| 84 | begin |
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| 85 | StrFmt(pszSidText + dwSidSize, '-%u', |
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| 86 | [GetSidSubAuthority(Sid, dwCounter)^]); |
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| 87 | dwSidSize := StrLen(pszSidText); |
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| 88 | end; |
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| 89 | |||
| 90 | Result := True; |
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| 91 | end; |
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| 92 | |||
| 93 | function ObtainTextSid(hToken: THandle; pszSid: PChar; |
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| 94 | var dwBufferLen: DWORD): BOOL; |
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| 95 | var |
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| 96 | dwReturnLength: DWORD; |
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| 97 | dwTokenUserLength: DWORD; |
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| 98 | tic: TTokenInformationClass; |
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| 99 | ptu: Pointer; |
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| 100 | begin |
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| 101 | Result := False; |
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| 102 | dwReturnLength := 0; |
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| 103 | dwTokenUserLength := 0; |
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| 104 | tic := TokenUser; |
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| 105 | ptu := nil; |
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| 106 | |||
| 107 | if not GetTokenInformation(hToken, tic, ptu, dwTokenUserLength, |
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| 108 | dwReturnLength) then |
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| 109 | begin |
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| 110 | if GetLastError = ERROR_INSUFFICIENT_BUFFER then |
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| 111 | begin |
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| 112 | ptu := HeapAlloc(GetProcessHeap, HEAP_ZERO_MEMORY, dwReturnLength); |
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| 113 | if ptu = nil then Exit; |
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| 114 | dwTokenUserLength := dwReturnLength; |
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| 115 | dwReturnLength := 0; |
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| 116 | |||
| 117 | if not GetTokenInformation(hToken, tic, ptu, dwTokenUserLength, |
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| 118 | dwReturnLength) then Exit; |
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| 119 | end |
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| 120 | else |
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| 121 | Exit; |
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| 122 | end; |
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| 123 | |||
| 124 | if not ConvertSid((PTokenUser(ptu).User).Sid, pszSid, dwBufferLen) then Exit; |
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| 125 | |||
| 126 | if not HeapFree(GetProcessHeap, 0, ptu) then Exit; |
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| 127 | |||
| 128 | Result := True; |
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| 129 | end; |
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| 130 | |||
| 131 | function GetCurrentUserSid: string; |
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| 132 | var |
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| 133 | hAccessToken: THandle; |
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| 134 | bSuccess: BOOL; |
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| 135 | dwBufferLen: DWORD; |
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| 136 | szSid: array[0..260] of Char; |
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| 137 | begin |
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| 138 | Result := ''; |
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| 139 | |||
| 140 | bSuccess := OpenThreadToken(GetCurrentThread, TOKEN_QUERY, True, |
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| 141 | hAccessToken); |
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| 142 | if not bSuccess then |
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| 143 | begin |
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| 144 | if GetLastError = ERROR_NO_TOKEN then |
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| 145 | bSuccess := OpenProcessToken(GetCurrentProcess, TOKEN_QUERY, |
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| 146 | hAccessToken); |
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| 147 | end; |
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| 148 | if bSuccess then |
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| 149 | begin |
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| 150 | ZeroMemory(@szSid, SizeOf(szSid)); |
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| 151 | dwBufferLen := SizeOf(szSid); |
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| 152 | |||
| 153 | if ObtainTextSid(hAccessToken, szSid, dwBufferLen) then |
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| 154 | Result := szSid; |
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| 155 | CloseHandle(hAccessToken); |
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| 156 | end; |
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| 157 | end; |
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| 158 | |||
| 159 | end. |