_SET_BAND_SECURITY_PARAMETERS structure

Description

The parameters to set security properties for a band on a storage device for a IOCTL_EHSTOR_BANDMGMT_SET_BAND_SECURITY request are specified in a SET_BAND_SECURITY_PARAMETERS structure.

Members

StructSize

The size of this structure in bytes. Set to sizeof(SET_BAND_SECURITY_PARAMETERS).

Flags

Security parameter flags. This value is a bitwise OR combination of the following.

Reserved

BandId

The identifier of a single band to return information for. BandSize must be 0 when a single band is selected with BandId. To use BandStart and BandSize instead of BandId to select a band, set BandId = (ULONG) –1.

BandStart

The starting byte location on the storage device to begin a band search. An attempt is made to match a band at or after BandStart.

CurrentAuthKeyOffset

The offset, in bytes, of an AUTH_KEY structure containing the current authentication key for the band. This authentication key is required and must be present following this structure. The offset is from the beginning of SET_BAND_SECURITY_PARAMETERS. AUTH_KEY is declared in ehstorbandmgmt.h as the following.

typedef struct _AUTH_KEY
{
    ULONG   KeySize;
    UCHAR   Key[ANYSIZE_ARRAY];
} AUTH_KEY;

KeySize

The size of the key, in bytes, of the key data at Key. If KeySize is set to 0, a default key is used.

Key

A variable-length byte array containing the key data.

To specify a default authentication key to the band, set AuthKeyOffset = EHSTOR_BANDMGR_NO_KEY.

NewAuthKeyOffset

The offset, in bytes, of an AUTH_KEY structure containing the new authentication key for the band. The offset is from the beginning of SET_BAND_SECURITY_PARAMETERS. AUTH_KEY is declared in ehstorbandmgmt.h as the following.

typedef struct _AUTH_KEY
{
    ULONG   KeySize;
    UCHAR   Key[ANYSIZE_ARRAY];
} AUTH_KEY;

KeySize

The size of the key, in bytes, of the key data at Key. If KeySize is set to 0, a default key is used.

Key

A variable-length byte array that contains the key data.

To assign a default authentication key to the band, set AuthKeyOffset = EHSTOR_BANDMGR_NO_KEY. If NewAuthKeyOffset == CurrentAuthKeyOffset, the authentication key for the band is left unchanged.

BandSecurityInfoOffset

The offset, in bytes, of a BAND_SECURITY_INFO structure. The offset is from the beginning of SET_BAND_SECURITY_PARAMETERS.

Remarks

Precedence is given to BandID for band selection. If BandID is greater than 0 and BandID is less than the MaxBandCount member of BAND_MANAGEMENT_CAPABILITIES, then BandID is used as the only selection criteria for a band match. If BandID == –1, then BandStart is used as the match criteria to select a band. If no band matches either selection criteria, then STATUS_INVALID_PARAMETER is returned in the IoStatus block for IOCTL_EHSTOR_BANDMGMT_SET_BAND_SECURITY.

If BandID and BandStart are both set to –1, then the IOCTL_EHSTOR_BANDMGMT_SET_BAND_SECURITY request will change the properties of the global band.

NewAuthKeyOffset and BandSecurityInfoOffset are optional depending on the requirements of the operation. If only the authentication key is changed, then NewAuthKeyOffset is set to the location of the AUTH_KEY structure for the new key and BandSecurityInfoOffset is set to zero. Similarly, if only security properties are changed, BandSecurityInfoOffset is set to the location of BAND_SECURITY_INFO and NewAuthKeyOffset is set to 0.

The CryptoAlgoIdType and CryptoAlgoOidString members of the BAND_SECURITY_INFO structure at BandSecurityInfoOffset are not used in a band creation request and must be set to 0.

See also

BAND_LOCATION_INFO

BAND_MANAGEMENT_CAPABILITIES

IOCTL_EHSTOR_BANDMGMT_SET_BAND_LOCATION