bb154e3e0c
Nitro Secure Module (NSM)[1] device is used in AWS Nitro Enclaves[2] for stripped down TPM functionality like cryptographic attestation. The requests to and responses from NSM device are CBOR[3] encoded. This commit adds support for NSM device in QEMU. Although related to AWS Nitro Enclaves, the virito-nsm device is independent and can be used in other machine types as well. The libcbor[4] library has been used for the CBOR encoding and decoding functionalities. [1] https://lists.oasis-open.org/archives/virtio-comment/202310/msg00387.html [2] https://docs.aws.amazon.com/enclaves/latest/user/nitro-enclave.html [3] http://cbor.io/ [4] https://libcbor.readthedocs.io/en/latest/ Signed-off-by: Dorjoy Chowdhury <dorjoychy111@gmail.com> Reviewed-by: Alexander Graf <graf@amazon.com> Link: https://lore.kernel.org/r/20241008211727.49088-3-dorjoychy111@gmail.com Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
50 lines
1.2 KiB
C
50 lines
1.2 KiB
C
/*
|
|
* AWS Nitro Secure Module (NSM) device
|
|
*
|
|
* Copyright (c) 2024 Dorjoy Chowdhury <dorjoychy111@gmail.com>
|
|
*
|
|
* This work is licensed under the terms of the GNU GPL, version 2 or
|
|
* (at your option) any later version. See the COPYING file in the
|
|
* top-level directory.
|
|
*/
|
|
|
|
#ifndef QEMU_VIRTIO_NSM_H
|
|
#define QEMU_VIRTIO_NSM_H
|
|
|
|
#include "crypto/hash.h"
|
|
#include "hw/virtio/virtio.h"
|
|
#include "qom/object.h"
|
|
|
|
#define NSM_MAX_PCRS 32
|
|
|
|
#define TYPE_VIRTIO_NSM "virtio-nsm-device"
|
|
OBJECT_DECLARE_SIMPLE_TYPE(VirtIONSM, VIRTIO_NSM)
|
|
#define VIRTIO_NSM_GET_PARENT_CLASS(obj) \
|
|
OBJECT_GET_PARENT_CLASS(obj, TYPE_VIRTIO_NSM)
|
|
|
|
struct PCRInfo {
|
|
bool locked;
|
|
uint8_t data[QCRYPTO_HASH_DIGEST_LEN_SHA384];
|
|
};
|
|
|
|
struct VirtIONSM {
|
|
VirtIODevice parent_obj;
|
|
|
|
/* Only one vq - guest puts request and response buffers on it */
|
|
VirtQueue *vq;
|
|
|
|
/* NSM State */
|
|
uint16_t max_pcrs;
|
|
struct PCRInfo pcrs[NSM_MAX_PCRS];
|
|
char *digest;
|
|
char *module_id;
|
|
uint8_t version_major;
|
|
uint8_t version_minor;
|
|
uint8_t version_patch;
|
|
|
|
bool (*extend_pcr)(VirtIONSM *vnsm, int ind, uint8_t *data, uint16_t len);
|
|
void (*lock_pcr)(VirtIONSM *vnsm, int ind);
|
|
};
|
|
|
|
#endif
|