5 extern imports_t imports;
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7 /* Open Policy object. */
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8 int open_lsa_policy(LSA_HANDLE *policy) {
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9 LSA_OBJECT_ATTRIBUTES attributes;
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10 ZeroMemory(&attributes, sizeof(attributes));
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12 NTSTATUS status = LsaOpenPolicy(0, &attributes, POLICY_ALL_ACCESS, policy);
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14 print_message(stderr, NSSM_MESSAGE_LSAOPENPOLICY_FAILED, error_string(LsaNtStatusToWinError(status)));
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21 /* Look up SID for an account. */
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22 int username_sid(const TCHAR *username, SID **sid, LSA_HANDLE *policy) {
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26 if (open_lsa_policy(policy)) return 1;
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30 LsaLookupNames() can't look up .\username but can look up
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31 %COMPUTERNAME%\username. ChangeServiceConfig() writes .\username to the
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32 registry when %COMPUTERNAME%\username is a passed as a parameter. We
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33 need to preserve .\username when calling ChangeServiceConfig() without
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34 changing the username, but expand to %COMPUTERNAME%\username when calling
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38 unsigned long expandedlen;
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39 if (_tcsnicmp(_T(".\\"), username, 2)) {
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40 expandedlen = (unsigned long) (_tcslen(username) + 1) * sizeof(TCHAR);
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41 expanded = (TCHAR *) HeapAlloc(GetProcessHeap(), 0, expandedlen);
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43 print_message(stderr, NSSM_MESSAGE_OUT_OF_MEMORY, _T("expanded"), _T("username_sid"));
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44 if (policy == &handle) LsaClose(handle);
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47 memmove(expanded, username, expandedlen);
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50 TCHAR computername[MAX_COMPUTERNAME_LENGTH + 1];
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51 expandedlen = _countof(computername);
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52 GetComputerName(computername, &expandedlen);
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53 expandedlen += (unsigned long) _tcslen(username);
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55 expanded = (TCHAR *) HeapAlloc(GetProcessHeap(), 0, expandedlen * sizeof(TCHAR));
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57 print_message(stderr, NSSM_MESSAGE_OUT_OF_MEMORY, _T("expanded"), _T("username_sid"));
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58 if (policy == &handle) LsaClose(handle);
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61 _sntprintf_s(expanded, expandedlen, _TRUNCATE, _T("%s\\%s"), computername, username + 2);
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64 LSA_UNICODE_STRING lsa_username;
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66 lsa_username.Buffer = (wchar_t *) expanded;
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67 lsa_username.Length = (unsigned short) _tcslen(expanded) * sizeof(TCHAR);
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68 lsa_username.MaximumLength = lsa_username.Length + sizeof(TCHAR);
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71 mbstowcs_s(&buflen, NULL, 0, expanded, _TRUNCATE);
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72 lsa_username.MaximumLength = (unsigned short) buflen * sizeof(wchar_t);
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73 lsa_username.Length = lsa_username.MaximumLength - sizeof(wchar_t);
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74 lsa_username.Buffer = (wchar_t *) HeapAlloc(GetProcessHeap(), 0, lsa_username.MaximumLength);
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75 if (lsa_username.Buffer) mbstowcs_s(&buflen, lsa_username.Buffer, lsa_username.MaximumLength, expanded, _TRUNCATE);
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77 if (policy == &handle) LsaClose(handle);
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78 HeapFree(GetProcessHeap(), 0, expanded);
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79 print_message(stderr, NSSM_MESSAGE_OUT_OF_MEMORY, _T("LSA_UNICODE_STRING"), _T("username_sid()"));
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84 LSA_REFERENCED_DOMAIN_LIST *translated_domains;
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85 LSA_TRANSLATED_SID *translated_sid;
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86 NTSTATUS status = LsaLookupNames(*policy, 1, &lsa_username, &translated_domains, &translated_sid);
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88 HeapFree(GetProcessHeap(), 0, lsa_username.Buffer);
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90 HeapFree(GetProcessHeap(), 0, expanded);
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91 if (policy == &handle) LsaClose(handle);
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93 LsaFreeMemory(translated_domains);
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94 LsaFreeMemory(translated_sid);
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95 print_message(stderr, NSSM_MESSAGE_LSALOOKUPNAMES_FAILED, username, error_string(LsaNtStatusToWinError(status)));
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99 if (translated_sid->Use != SidTypeUser && translated_sid->Use != SidTypeWellKnownGroup) {
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100 LsaFreeMemory(translated_domains);
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101 LsaFreeMemory(translated_sid);
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102 print_message(stderr, NSSM_GUI_INVALID_USERNAME, username);
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106 LSA_TRUST_INFORMATION *trust = &translated_domains->Domains[translated_sid->DomainIndex];
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107 if (! trust || ! IsValidSid(trust->Sid)) {
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108 LsaFreeMemory(translated_domains);
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109 LsaFreeMemory(translated_sid);
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110 print_message(stderr, NSSM_GUI_INVALID_USERNAME, username);
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114 /* GetSidSubAuthority*() return pointers! */
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115 unsigned char *n = GetSidSubAuthorityCount(trust->Sid);
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117 /* Convert translated SID to SID. */
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118 *sid = (SID *) HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, GetSidLengthRequired(*n + 1));
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120 LsaFreeMemory(translated_domains);
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121 LsaFreeMemory(translated_sid);
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122 print_message(stderr, NSSM_MESSAGE_OUT_OF_MEMORY, _T("SID"), _T("username_sid"));
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126 unsigned long error;
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127 if (! InitializeSid(*sid, GetSidIdentifierAuthority(trust->Sid), *n + 1)) {
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128 error = GetLastError();
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129 HeapFree(GetProcessHeap(), 0, *sid);
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130 LsaFreeMemory(translated_domains);
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131 LsaFreeMemory(translated_sid);
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132 print_message(stderr, NSSM_MESSAGE_INITIALIZESID_FAILED, username, error_string(error));
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136 for (unsigned char i = 0; i <= *n; i++) {
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137 unsigned long *sub = GetSidSubAuthority(*sid, i);
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138 if (i < *n) *sub = *GetSidSubAuthority(trust->Sid, i);
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139 else *sub = translated_sid->RelativeId;
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143 if (translated_sid->Use == SidTypeWellKnownGroup && ! well_known_sid(*sid)) {
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144 print_message(stderr, NSSM_GUI_INVALID_USERNAME, username);
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148 LsaFreeMemory(translated_domains);
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149 LsaFreeMemory(translated_sid);
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154 int username_sid(const TCHAR *username, SID **sid) {
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155 return username_sid(username, sid, 0);
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158 int canonicalise_username(const TCHAR *username, TCHAR **canon) {
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160 if (open_lsa_policy(&policy)) return 1;
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163 if (username_sid(username, &sid, &policy)) return 2;
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164 PSID sids = { sid };
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166 LSA_REFERENCED_DOMAIN_LIST *translated_domains;
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167 LSA_TRANSLATED_NAME *translated_name;
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168 NTSTATUS status = LsaLookupSids(policy, 1, &sids, &translated_domains, &translated_name);
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170 LsaFreeMemory(translated_domains);
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171 LsaFreeMemory(translated_name);
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172 print_message(stderr, NSSM_MESSAGE_LSALOOKUPSIDS_FAILED, error_string(LsaNtStatusToWinError(status)));
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176 LSA_TRUST_INFORMATION *trust = &translated_domains->Domains[translated_name->DomainIndex];
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177 LSA_UNICODE_STRING lsa_canon;
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178 lsa_canon.Length = translated_name->Name.Length + trust->Name.Length + sizeof(wchar_t);
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179 lsa_canon.MaximumLength = lsa_canon.Length + sizeof(wchar_t);
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180 lsa_canon.Buffer = (wchar_t *) HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, lsa_canon.MaximumLength);
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181 if (! lsa_canon.Buffer) {
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182 LsaFreeMemory(translated_domains);
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183 LsaFreeMemory(translated_name);
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184 print_message(stderr, NSSM_MESSAGE_OUT_OF_MEMORY, _T("lsa_canon"), _T("username_sid"));
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188 /* Buffer is wchar_t but Length is in bytes. */
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189 memmove((char *) lsa_canon.Buffer, trust->Name.Buffer, trust->Name.Length);
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190 memmove((char *) lsa_canon.Buffer + trust->Name.Length, L"\\", sizeof(wchar_t));
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191 memmove((char *) lsa_canon.Buffer + trust->Name.Length + sizeof(wchar_t), translated_name->Name.Buffer, translated_name->Name.Length);
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194 *canon = lsa_canon.Buffer;
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197 wcstombs_s(&buflen, NULL, 0, lsa_canon.Buffer, _TRUNCATE);
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198 *canon = (TCHAR *) HeapAlloc(GetProcessHeap(), 0, buflen);
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200 LsaFreeMemory(translated_domains);
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201 LsaFreeMemory(translated_name);
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202 print_message(stderr, NSSM_MESSAGE_OUT_OF_MEMORY, _T("canon"), _T("username_sid"));
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205 wcstombs_s(&buflen, *canon, buflen, lsa_canon.Buffer, _TRUNCATE);
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206 HeapFree(GetProcessHeap(), 0, lsa_canon.Buffer);
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209 LsaFreeMemory(translated_domains);
\r
210 LsaFreeMemory(translated_name);
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215 /* Do two usernames map to the same SID? */
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216 int username_equiv(const TCHAR *a, const TCHAR *b) {
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217 SID *sid_a, *sid_b;
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218 if (username_sid(a, &sid_a)) return 0;
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220 if (username_sid(b, &sid_b)) {
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226 if (EqualSid(sid_a, sid_b)) ret = 1;
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234 /* Does the username represent the LocalSystem account? */
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235 int is_localsystem(const TCHAR *username) {
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236 if (str_equiv(username, NSSM_LOCALSYSTEM_ACCOUNT)) return 1;
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237 if (! imports.IsWellKnownSid) return 0;
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240 if (username_sid(username, &sid)) return 0;
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243 if (imports.IsWellKnownSid(sid, WinLocalSystemSid)) ret = 1;
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251 Get well-known alias for LocalSystem and friends.
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252 Returns a pointer to a static string. DO NOT try to free it.
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254 const TCHAR *well_known_sid(SID *sid) {
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255 if (! imports.IsWellKnownSid) return 0;
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256 if (imports.IsWellKnownSid(sid, WinLocalSystemSid)) return NSSM_LOCALSYSTEM_ACCOUNT;
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257 if (imports.IsWellKnownSid(sid, WinLocalServiceSid)) return NSSM_LOCALSERVICE_ACCOUNT;
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258 if (imports.IsWellKnownSid(sid, WinNetworkServiceSid)) return NSSM_NETWORKSERVICE_ACCOUNT;
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262 const TCHAR *well_known_username(const TCHAR *username) {
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263 if (! username) return NSSM_LOCALSYSTEM_ACCOUNT;
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264 if (str_equiv(username, NSSM_LOCALSYSTEM_ACCOUNT)) return NSSM_LOCALSYSTEM_ACCOUNT;
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266 if (username_sid(username, &sid)) return 0;
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268 const TCHAR *well_known = well_known_sid(sid);
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274 int grant_logon_as_service(const TCHAR *username) {
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275 if (! username) return 0;
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277 /* Open Policy object. */
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278 LSA_OBJECT_ATTRIBUTES attributes;
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279 ZeroMemory(&attributes, sizeof(attributes));
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284 if (open_lsa_policy(&policy)) return 1;
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286 /* Look up SID for the account. */
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288 if (username_sid(username, &sid, &policy)) {
\r
294 Shouldn't happen because it should have been checked before callling this function.
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296 if (well_known_sid(sid)) {
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301 /* Check if the SID has the "Log on as a service" right. */
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302 LSA_UNICODE_STRING lsa_right;
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303 lsa_right.Buffer = NSSM_LOGON_AS_SERVICE_RIGHT;
\r
304 lsa_right.Length = (unsigned short) wcslen(lsa_right.Buffer) * sizeof(wchar_t);
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305 lsa_right.MaximumLength = lsa_right.Length + sizeof(wchar_t);
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307 LSA_UNICODE_STRING *rights;
\r
308 unsigned long count = ~0;
\r
309 status = LsaEnumerateAccountRights(policy, sid, &rights, &count);
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312 If the account has no rights set LsaEnumerateAccountRights() will return
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313 STATUS_OBJECT_NAME_NOT_FOUND and set count to 0.
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315 unsigned long error = LsaNtStatusToWinError(status);
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316 if (error != ERROR_FILE_NOT_FOUND) {
\r
319 print_message(stderr, NSSM_MESSAGE_LSAENUMERATEACCOUNTRIGHTS_FAILED, username, error_string(error));
\r
324 for (unsigned long i = 0; i < count; i++) {
\r
325 if (rights[i].Length != lsa_right.Length) continue;
\r
326 if (_wcsnicmp(rights[i].Buffer, lsa_right.Buffer, lsa_right.MaximumLength)) continue;
\r
327 /* The SID has the right. */
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329 LsaFreeMemory(rights);
\r
333 LsaFreeMemory(rights);
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335 /* Add the right. */
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336 status = LsaAddAccountRights(policy, sid, &lsa_right, 1);
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340 print_message(stderr, NSSM_MESSAGE_LSAADDACCOUNTRIGHTS_FAILED, error_string(LsaNtStatusToWinError(status)));
\r
344 print_message(stdout, NSSM_MESSAGE_GRANTED_LOGON_AS_SERVICE, username);
\r