RPC_C_AUTHN_LEVEL_xxx

Used in the security functions and interfaces to specify the authentication level. These levels indicate the amount of authentication provided to ensure the integrity of the data. Each level includes the protection provided by the previous levels.

Values

RPC_C_AUTHN_LEVEL_DEFAULT

Tells DCOM to choose the authentication level using its normal security blanket negotiation algorithm. This behavior occurs in Windows NT 5.0 and later versions. In Windows NT 4.0, this value defaulted to RPC_C_AUTHN_CONNECT. For more information, see Security Blanket Negotiation.

RPC_C_AUTHN_LEVEL_NONE

Performs no authentication.

RPC_C_AUTHN_LEVEL_CONNECT

Authenticates the credentials of the client only when the client establishes a relationship with the server. Datagram transports always use RPC_AUTHN_LEVEL_PKT instead.

RPC_C_AUTHN_LEVEL_CALL

Authenticates only at the beginning of each remote procedure call when the server receives the request. Datagram transports use RPC_C_AUTHN_LEVEL_PKT instead.

RPC_C_AUTHN_LEVEL_PKT

Authenticates that all data received is from the expected client.

RPC_C_AUTHN_LEVEL_PKT_INTEGRITY

Authenticates and verifies that none of the data transferred between client and server has been modified.

RPC_C_AUTHN_LEVEL_PKT_PRIVACY

Authenticates all previous levels and encrypts the argument value of each remote procedure call.

Windows 95: While Windows 95 can make calls at any level, it can only receive calls at NONE or CONNECT.

QuickInfo

  Windows NT: Use version 3.1 and later.
  Windows: Use Windows 95 and later.
  Windows CE: Unsupported.
  Header: Declared in rpcdce.h.

See Also

IClientSecurity, IServerSecurity