Authentication-Level Constants
The AuthnLevel
argument represents the authentication level supplied to the RpcBindingInqAuthInfo
and RpcBindingSetAuthInfo run-time functions.
The levels
are listed in order of increasing authentication. Each new level adds to the
authentication provided by the previous level. If the RPC run-time library does
not support the specified level, it automatically upgrades to the next higher
supported level.
The following
constants represent valid values for the AuthnLevel argument:
|
Constant |
Description |
|
RPC_C_AUTHN_LEVEL_DEFAULT |
Uses the
default authentication level for the specified authentication service. |
|
RPC_C_AUTHN_LEVEL_NONE |
Performs no
authentication. |
|
RPC_C_AUTHN_LEVEL_CONNECT |
Authenticates
only when the client establishes a relationship with a server. |
|
RPC_C_AUTHN_LEVEL_CALL |
Authenticates
only at the beginning of each remote procedure call when the server receives
the request. Does not apply to remote procedure calls made using the
connection-based protocol sequences (those that start with the prefix ncacn ).
If the protocol sequence in a binding handle is a connection-based protocol
sequence and you specify this level, this routine instead uses the
RPC_C_AUTHN_LEVEL_PKT constant. |
|
RPC_C_AUTHN_LEVEL_PKT |
Authenticates
that all data received is from the expected client. |
|
RPC_C_AUTHN_LEVEL_PKT |
Authenticates
and verifies that none of the data transferred between client and server has
been modified. |
|
RPC_C_AUTHN_LEVEL_PKT |
Authenticates
all previous levels and encrypts the argument value of each remote procedure
call. |
Note
RPC_C_AUTHN_LEVEL_CALL, RPC_C_AUTHN_LEVEL_PKT,
RPC_C_AUTHN_LEVEL_PKT_INTEGRITY, and RPC_C_AUTHN_LEVEL_PKT_PRIVACY are only
supported for clients communicating with a Windows NT server. A Windows 95
server can only accept incoming calls at the RPC_C_AUTHN_LEVEL_CONNECT level.
See Also