Authentication-Level Constants
The authentication-level constants represent authentication levels passed to various run-time functions. These 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.
| Constant | Description |
|---|---|
|
Uses the default authentication level for the specified authentication service. |
|
Performs no authentication. |
|
Authenticates only when the client establishes a relationship with a server. |
|
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. |
|
Authenticates only that all data received is from the expected client. Does not validate the data itself. |
|
Authenticates and verifies that none of the data transferred between client and server has been modified. |
|
Includes all previous levels, and ensures clear text data can only be seen by the sender and the receiver. In the local case, this involves using a secure channel. In the remote case, this involves encrypting the argument value of each remote procedure call. |
Remarks
Regardless of the value specified by the constant, ncalrpc always uses RPC_C_AUTHN_LEVEL_PKT_PRIVACY.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client |
Windows 2000 Professional [desktop apps only] |
| Minimum supported server |
Windows 2000 Server [desktop apps only] |
| Header |
|