// ntddndis.h

typedef struct _OFFLOAD_SECURITY_ASSOCIATION {
  OFFLOAD_OPERATION_E Operation;
  SPI_TYPE            SPI;
  OFFLOAD_ALGO_INFO   IntegrityAlgo;
  OFFLOAD_ALGO_INFO   ConfAlgo;
  OFFLOAD_ALGO_INFO   Reserved;
} OFFLOAD_SECURITY_ASSOCIATION, *POFFLOAD_SECURITY_ASSOCIATION;
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Windows Driver Kit DDI reference (ns-ntddndis-_offload_security_association)

_OFFLOAD_SECURITY_ASSOCIATION structure

Description

The OFFLOAD_SECURITY_ASSOCIATION structure specifies a single security association (SA).

Members

`Operation`

The Internet Protocol security (IPsec) operation for which the SA is to be used. The following operations are supported:

AUTHENTICATE

The SA will be used for authentication (integrity checking).

ENCRYPT

The SA will be used for encryption/decryption (confidentiality).

`SPI`

The Security Parameters Index (SPI) for the SA.

`IntegrityAlgo`

The integrity (authentication) algorithm for the SA, formatted as an OFFLOAD_ALGO_INFO structure.

`ConfAlgo`

The confidentiality (encryption/decryption) algorithm for the SA, formatted as an OFFLOAD_ALGO_INFO structure.

`Reserved`

This member is reserved.

Remarks

The OFFLOAD_SECURITY_ASSOCIATION structure is used with the OID_TCP_TASK_IPSEC_ADD_SA and OID_TCP_TASK_IPSEC_ADD_UDPESP_SA OIDs.

OFFLOAD_SECURITY_ASSOCIATION - NtDoc