The Key Management Service (KMS) protocol as defined in the UEFI 2.3.1 specification is to provides services to generate, store, retrieve, and manage cryptographic keys. The intention is to specify a simple generic protocol that could be used for many implementations.

A driver implementing the protocol may need to provide basic key service that consists of a key store and cryptographic key generation capability. It may connect to an external key server over the network, or to a Hardware Security Module (HSM) attached to the system it runs on, or anything else that is capable of providing the key management service.

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SPDX-License-Identifier: BSD-2-Clause-Patent

GUID Information

GUID's Guid Name	GUID's Guid
gEfiKmsFormatAescbc256Guid	{ 0xd7e69789, 0x1f68, 0x45e8, {0x96, 0xef, 0x3b, 0x64, 0x07, 0xa5, 0xb2, 0xdc }}

Refer to Header File

MdePkg/Include/Protocol/Kms.h