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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 | |||
82 | daniel-mar | 8 | (*** Modified and extended by ViaThinkSoft ***) |
68 | daniel-mar | 9 | |
10 | { |
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11 | SID is a data structure of variable length that identifies user, group, |
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12 | and computer accounts. |
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13 | Every account on a network is issued a unique SID when the account is first created. |
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14 | Internal processes in Windows refer to an account's SID |
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15 | rather than the account's user or group name. |
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16 | } |
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17 | |||
18 | |||
19 | unit SPGetSid; |
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20 | |||
21 | interface |
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22 | |||
23 | uses |
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24 | Windows, SysUtils; |
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25 | |||
26 | function GetCurrentUserSid: string; |
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82 | daniel-mar | 27 | function GetComputerSID: string; |
68 | daniel-mar | 28 | |
29 | implementation |
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30 | |||
31 | const |
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32 | HEAP_ZERO_MEMORY = $00000008; |
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33 | SID_REVISION = 1; // Current revision level |
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34 | |||
35 | type |
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36 | PTokenUser = ^TTokenUser; |
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37 | TTokenUser = packed record |
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38 | User: TSidAndAttributes; |
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39 | end; |
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40 | |||
41 | function ConvertSid(Sid: PSID; pszSidText: PChar; var dwBufferLen: DWORD): BOOL; |
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42 | var |
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43 | psia: PSIDIdentifierAuthority; |
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44 | dwSubAuthorities: DWORD; |
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45 | dwSidRev: DWORD; |
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46 | dwCounter: DWORD; |
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47 | dwSidSize: DWORD; |
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48 | begin |
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49 | Result := False; |
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50 | |||
51 | dwSidRev := SID_REVISION; |
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52 | |||
53 | if not IsValidSid(Sid) then Exit; |
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54 | |||
55 | psia := GetSidIdentifierAuthority(Sid); |
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56 | |||
57 | dwSubAuthorities := GetSidSubAuthorityCount(Sid)^; |
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58 | |||
59 | dwSidSize := (15 + 12 + (12 * dwSubAuthorities) + 1) * SizeOf(Char); |
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60 | |||
61 | if (dwBufferLen < dwSidSize) then |
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62 | begin |
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63 | dwBufferLen := dwSidSize; |
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64 | SetLastError(ERROR_INSUFFICIENT_BUFFER); |
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65 | Exit; |
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66 | end; |
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67 | |||
68 | StrFmt(pszSidText, 'S-%u-', [dwSidRev]); |
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69 | |||
70 | if (psia.Value[0] <> 0) or (psia.Value[1] <> 0) then |
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71 | StrFmt(pszSidText + StrLen(pszSidText), |
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72 | '0x%.2x%.2x%.2x%.2x%.2x%.2x', |
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73 | [psia.Value[0], psia.Value[1], psia.Value[2], |
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74 | psia.Value[3], psia.Value[4], psia.Value[5]]) |
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75 | else |
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76 | StrFmt(pszSidText + StrLen(pszSidText), |
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77 | '%u', |
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78 | [DWORD(psia.Value[5]) + |
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79 | DWORD(psia.Value[4] shl 8) + |
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80 | DWORD(psia.Value[3] shl 16) + |
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81 | DWORD(psia.Value[2] shl 24)]); |
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82 | |||
83 | dwSidSize := StrLen(pszSidText); |
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84 | |||
85 | for dwCounter := 0 to dwSubAuthorities - 1 do |
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86 | begin |
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87 | StrFmt(pszSidText + dwSidSize, '-%u', |
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88 | [GetSidSubAuthority(Sid, dwCounter)^]); |
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89 | dwSidSize := StrLen(pszSidText); |
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90 | end; |
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91 | |||
92 | Result := True; |
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93 | end; |
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94 | |||
81 | daniel-mar | 95 | function ObtainTextSid(hToken: THandle; pszSid: PChar; var dwBufferLen: DWORD): BOOL; |
68 | daniel-mar | 96 | var |
97 | dwReturnLength: DWORD; |
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98 | dwTokenUserLength: DWORD; |
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99 | tic: TTokenInformationClass; |
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100 | ptu: Pointer; |
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101 | begin |
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102 | Result := False; |
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103 | dwReturnLength := 0; |
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104 | dwTokenUserLength := 0; |
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105 | tic := TokenUser; |
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106 | ptu := nil; |
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107 | |||
108 | if not GetTokenInformation(hToken, tic, ptu, dwTokenUserLength, |
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109 | dwReturnLength) then |
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110 | begin |
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111 | if GetLastError = ERROR_INSUFFICIENT_BUFFER then |
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112 | begin |
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113 | ptu := HeapAlloc(GetProcessHeap, HEAP_ZERO_MEMORY, dwReturnLength); |
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114 | if ptu = nil then Exit; |
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115 | dwTokenUserLength := dwReturnLength; |
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116 | dwReturnLength := 0; |
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117 | |||
118 | if not GetTokenInformation(hToken, tic, ptu, dwTokenUserLength, |
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119 | dwReturnLength) then Exit; |
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120 | end |
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121 | else |
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122 | Exit; |
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123 | end; |
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124 | |||
125 | if not ConvertSid((PTokenUser(ptu).User).Sid, pszSid, dwBufferLen) then Exit; |
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126 | |||
127 | if not HeapFree(GetProcessHeap, 0, ptu) then Exit; |
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128 | |||
129 | Result := True; |
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130 | end; |
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131 | |||
132 | function GetCurrentUserSid: string; |
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133 | var |
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134 | hAccessToken: THandle; |
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135 | bSuccess: BOOL; |
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136 | dwBufferLen: DWORD; |
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81 | daniel-mar | 137 | szSid: array[0..MAX_PATH] of Char; |
68 | daniel-mar | 138 | begin |
139 | Result := ''; |
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140 | |||
141 | bSuccess := OpenThreadToken(GetCurrentThread, TOKEN_QUERY, True, |
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142 | hAccessToken); |
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143 | if not bSuccess then |
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144 | begin |
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145 | if GetLastError = ERROR_NO_TOKEN then |
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146 | bSuccess := OpenProcessToken(GetCurrentProcess, TOKEN_QUERY, |
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147 | hAccessToken); |
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148 | end; |
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149 | if bSuccess then |
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150 | begin |
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151 | ZeroMemory(@szSid, SizeOf(szSid)); |
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152 | dwBufferLen := SizeOf(szSid); |
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153 | |||
154 | if ObtainTextSid(hAccessToken, szSid, dwBufferLen) then |
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155 | Result := szSid; |
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156 | CloseHandle(hAccessToken); |
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157 | end; |
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158 | end; |
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159 | |||
82 | daniel-mar | 160 | // --- Section added by ViaThinkSoft --- |
161 | |||
162 | function SIDToString(ASID: PSID): string; |
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163 | |||
164 | function _FallBack: string; |
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165 | var |
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166 | StringSid : PChar; |
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167 | len: DWORD; |
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168 | begin |
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169 | len := MAX_PATH; |
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170 | StringSid := AllocMem(MAX_PATH); |
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171 | ConvertSid(ASID, StringSid, len); |
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172 | Result := string(StringSid); |
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173 | FreeMem(StringSid); |
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174 | end; |
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175 | |||
176 | type |
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177 | TFuncConvertSidToStringSid = function(Sid: PSID; out StringSid: PChar): BOOL; stdcall; |
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178 | var |
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98 | daniel-mar | 179 | dllHandle: HMODULE; |
82 | daniel-mar | 180 | fConvertSidToStringSid: TFuncConvertSidToStringSid; |
181 | StringSid : PChar; |
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182 | begin |
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183 | dllHandle := LoadLibrary(advapi32); |
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184 | if dllHandle = 0 then |
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185 | begin |
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186 | result := _FallBack; |
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187 | Exit; |
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188 | end; |
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189 | try |
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190 | @fConvertSidToStringSid := GetProcAddress(dllHandle, {$IFDEF UNICODE}'ConvertSidToStringSidW'{$ELSE}'ConvertSidToStringSidA'{$ENDIF}); |
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191 | if not Assigned(fConvertSidToStringSid) then |
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192 | begin |
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193 | result := _FallBack; |
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194 | Exit; |
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195 | end; |
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196 | |||
197 | fConvertSidToStringSid(ASID, StringSid); |
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198 | Result := string(StringSid); |
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199 | LocalFree(HLocal(StringSid)); // added by ViaThinkSoft |
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200 | finally |
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201 | FreeLibrary(dllHandle); |
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202 | end; |
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203 | end; |
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204 | |||
205 | function GetComputerName: string; |
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206 | // Source: http://www.delphi-treff.de/tipps-tricks/netzwerkinternet/netzwerkeigenschaften/computernamen-des-eigenen-rechners-ermitteln/ |
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207 | var |
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208 | Len: DWORD; |
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209 | begin |
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210 | Len := MAX_COMPUTERNAME_LENGTH+1; |
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211 | SetLength(Result,Len); |
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212 | if Windows.GetComputerName(PChar(Result), Len) then |
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213 | SetLength(Result,Len) |
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214 | else |
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215 | RaiseLastOSError; |
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216 | end; |
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217 | |||
218 | function GetComputerSID: string; |
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219 | // Source: http://stackoverflow.com/a/7643383 |
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220 | var |
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221 | Sid: PSID; |
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222 | cbSid: DWORD; |
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223 | cbReferencedDomainName : DWORD; |
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224 | ReferencedDomainName: string; |
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225 | peUse: SID_NAME_USE; |
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226 | Success: BOOL; |
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227 | lpSystemName : string; |
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228 | lpAccountName: string; |
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229 | begin |
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230 | result := ''; |
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231 | Sid:=nil; |
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232 | try |
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233 | lpSystemName:=''; |
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234 | lpAccountName:=GetComputerName; |
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235 | |||
236 | cbSid := 0; |
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237 | cbReferencedDomainName := 0; |
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238 | // First call to LookupAccountName to get the buffer sizes. |
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239 | Success := LookupAccountName(PChar(lpSystemName), PChar(lpAccountName), nil, cbSid, nil, cbReferencedDomainName, peUse); |
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240 | if (not Success) and (GetLastError = ERROR_INSUFFICIENT_BUFFER) then |
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241 | begin |
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242 | SetLength(ReferencedDomainName, cbReferencedDomainName); |
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243 | Sid := AllocMem(cbSid); |
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244 | // Second call to LookupAccountName to get the SID. |
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245 | Success := LookupAccountName(PChar(lpSystemName), PChar(lpAccountName), Sid, cbSid, PChar(ReferencedDomainName), cbReferencedDomainName, peUse); |
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246 | if not Success then |
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247 | begin |
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248 | FreeMem(Sid); |
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249 | Sid := nil; |
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250 | RaiseLastOSError; |
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251 | end |
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252 | else |
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253 | Result := SIDToString(Sid); |
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254 | end |
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255 | else |
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256 | RaiseLastOSError; |
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257 | finally |
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258 | if Assigned(Sid) then |
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259 | FreeMem(Sid); |
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260 | end; |
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261 | end; |
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262 | |||
68 | daniel-mar | 263 | end. |