1 // Copyright 2013 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "remoting/host/win/com_security.h" 6 7 #include <objidl.h> 8 9 #include "base/basictypes.h" 10 #include "base/compiler_specific.h" 11 #include "base/logging.h" 12 #include "base/win/windows_version.h" 13 #include "remoting/host/win/security_descriptor.h" 14 15 namespace remoting { 16 17 bool InitializeComSecurity(const std::string& security_descriptor, 18 const std::string& mandatory_label, 19 bool activate_as_activator) { 20 std::string sddl = security_descriptor; 21 if (base::win::GetVersion() >= base::win::VERSION_VISTA) { 22 sddl += mandatory_label; 23 } 24 25 // Convert the SDDL description into a security descriptor in absolute format. 26 ScopedSd relative_sd = ConvertSddlToSd(sddl); 27 if (!relative_sd) { 28 PLOG(ERROR) << "Failed to create a security descriptor"; 29 return false; 30 } 31 ScopedSd absolute_sd; 32 ScopedAcl dacl; 33 ScopedSid group; 34 ScopedSid owner; 35 ScopedAcl sacl; 36 if (!MakeScopedAbsoluteSd(relative_sd, &absolute_sd, &dacl, &group, &owner, 37 &sacl)) { 38 PLOG(ERROR) << "MakeScopedAbsoluteSd() failed"; 39 return false; 40 } 41 42 DWORD capabilities = EOAC_DYNAMIC_CLOAKING; 43 if (!activate_as_activator) 44 capabilities |= EOAC_DISABLE_AAA; 45 46 // Apply the security descriptor and default security settings. See 47 // InitializeComSecurity's declaration for details. 48 HRESULT result = CoInitializeSecurity( 49 absolute_sd.get(), 50 -1, // Let COM choose which authentication services to register. 51 NULL, // See above. 52 NULL, // Reserved, must be NULL. 53 RPC_C_AUTHN_LEVEL_PKT_PRIVACY, 54 RPC_C_IMP_LEVEL_IDENTIFY, 55 NULL, // Default authentication information is not provided. 56 capabilities, 57 NULL); /// Reserved, must be NULL 58 if (FAILED(result)) { 59 LOG(ERROR) << "CoInitializeSecurity() failed, result=0x" 60 << std::hex << result << std::dec << "."; 61 return false; 62 } 63 64 return true; 65 } 66 67 } // namespace remoting 68
