COM settings in OPC Classic client components: Difference between revisions
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[[Category:Troubleshooting]] | [[Category:Troubleshooting]] | ||
This article describes the internal effects of the UseCustomSecurity, TurnOffCallSecurity and TurnOffActivationSecurity settings. | |||
COM and proxy initialization: | COM and proxy initialization: | ||
* Without UseCustomSecurity: CoInitializeSecurity is not called, CoSetProxyBlanket is not called | * Without UseCustomSecurity: CoInitializeSecurity is not called, CoSetProxyBlanket is not called | ||
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* Without TurnOffCallSecurity (the default): dwAuthnLevel = RPC_C_AUTHN_LEVEL_CONNECT (2); dwImpLevel = RPC_C_IMP_LEVEL_IMPERSONATE (3); pSecDesc = <by CSecurityDescriptor::InitializeFromThreadToken()> | * Without TurnOffCallSecurity (the default): dwAuthnLevel = RPC_C_AUTHN_LEVEL_CONNECT (2); dwImpLevel = RPC_C_IMP_LEVEL_IMPERSONATE (3); pSecDesc = <by CSecurityDescriptor::InitializeFromThreadToken()> | ||
* With TurnOffCallSecurity: dwAuthnLevel = RPC_C_AUTHN_LEVEL_NONE (1); dwImpLevel = RPC_C_IMP_LEVEL_IMPERSONATE (3); pSecDesc = NULL | * With TurnOffCallSecurity: dwAuthnLevel = RPC_C_AUTHN_LEVEL_NONE (1); dwImpLevel = RPC_C_IMP_LEVEL_IMPERSONATE (3); pSecDesc = NULL | ||
CoSetProxyBlanket parameters: dwAuthnLevel and dwImpLevel are the same as those used with CoInitializeSecurity. | |||
COAUTHINFO* pAuthInfo in COSERVERINFO* passed to CoCreateInstanceEx (when machine name is not empty): | COAUTHINFO* pAuthInfo in COSERVERINFO* passed to CoCreateInstanceEx (when machine name is not empty): | ||
Revision as of 13:01, 16 October 2021
This article describes the internal effects of the UseCustomSecurity, TurnOffCallSecurity and TurnOffActivationSecurity settings.
COM and proxy initialization:
- Without UseCustomSecurity: CoInitializeSecurity is not called, CoSetProxyBlanket is not called
- With UseCustomSecurity (the default): CoInitializeSecurity is called, CoSetProxyBlanket is called
CoInitializeSecurity parameters:
- Without TurnOffCallSecurity (the default): dwAuthnLevel = RPC_C_AUTHN_LEVEL_CONNECT (2); dwImpLevel = RPC_C_IMP_LEVEL_IMPERSONATE (3); pSecDesc = <by CSecurityDescriptor::InitializeFromThreadToken()>
- With TurnOffCallSecurity: dwAuthnLevel = RPC_C_AUTHN_LEVEL_NONE (1); dwImpLevel = RPC_C_IMP_LEVEL_IMPERSONATE (3); pSecDesc = NULL
CoSetProxyBlanket parameters: dwAuthnLevel and dwImpLevel are the same as those used with CoInitializeSecurity.
COAUTHINFO* pAuthInfo in COSERVERINFO* passed to CoCreateInstanceEx (when machine name is not empty):
- Without TurnOffActivationSecurity (the default): dwAuthnSvc = RPC_C_AUTHN_NONE; dwAuthzSvc = RPC_C_AUTHZ_NONE; pwszServerPrincName = NULL; dwAuthnLevel = RPC_C_AUTHN_LEVEL_NONE; dwImpersonationLevel = RPC_C_IMP_LEVEL_IMPERSONATE; pAuthIdentityData = NULL; dwCapabilities = EOAC_NONE;
- With TurnOffActivationSecurity: NULL
