IOCTL_AACS_SEND_CHALLENGE_KEY - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers 
// ntddcdvd.h

// CTL_CODE(0x0033, 0x437, METHOD_BUFFERED, FILE_READ_ACCESS)
#define IOCTL_AACS_SEND_CHALLENGE_KEY 0x003350DC
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Windows Driver Kit DDI reference (ni-ntddcdvd-ioctl_aacs_send_challenge_key)

IOCTL_AACS_SEND_CHALLENGE_KEY IOCTL

Description

Sends the host's challenge key to the logical unit. The host's challenge key consists of a point on an elliptic curve and its associated signature.

Parameters

Major code

Input buffer

The buffer at Irp->AssociatedIrp.SystemBuffer contains a AACS_SEND_CHALLENGE_KEY structure.

Input buffer length

Length of an AACS_SEND_CHALLENGE_KEY structure.

Output buffer

None.

Output buffer length

None.

Input/output buffer

Input/output buffer length

Status block

The Information field is set to the number of bytes transferred. The Status field is set to STATUS_SUCCESS or possibly STATUS_INSUFFICIENT_RESOURCES.

Remarks

The IOCTL_AACS_SEND_CHALLENGE_KEY request corresponds to the step in the Advanced Access Content System (AACS) authentication algorithm (AACS-Auth) in which the host provides the drive a point on the curve. For a complete description of AACS-Auth, see the Advanced Access Content System, Introduction and Common Cryptographic Elements specification that is published by Advanced Access Content System Licensing Administrator (AACS LA).

View the official Windows Driver Kit DDI reference

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