u-boot/drivers/crypto/fsl/jobdesc.h
Raul Cardenas 0200020bc2 imx6: Added DEK blob generator command
Freescale's SEC block has built-in Data Encryption
Key(DEK) Blob Protocol which provides a method for
protecting a DEK for non-secure memory storage.
SEC block protects data in a data structure called
a Secret Key Blob, which provides both confidentiality
and integrity protection.
Every time the blob encapsulation is executed,
a AES-256 key is randomly generated to encrypt the DEK.
This key is encrypted with the OTP Secret key
from SoC. The resulting blob consists of the encrypted
AES-256 key, the encrypted DEK, and a 16-bit MAC.

During decapsulation, the reverse process is performed
to get back the original DEK. A caveat to the blob
decapsulation process,  is that the DEK is decrypted
in secure-memory and can only be read by FSL SEC HW.
The DEK is used to decrypt data during encrypted boot.

Commands added
--------------
  dek_blob - encapsulating DEK as a cryptgraphic blob

Commands Syntax
---------------
  dek_blob src dst len

    Encapsulate and create blob of a len-bits DEK at
    address src and store the result at address dst.

Signed-off-by: Raul Cardenas <Ulises.Cardenas@freescale.com>
Signed-off-by: Nitin Garg <nitin.garg@freescale.com>

Signed-off-by: Ulises Cardenas <ulises.cardenas@freescale.com>

Signed-off-by: Ulises Cardenas-B45798 <Ulises.Cardenas@freescale.com>
2015-03-02 09:57:06 +01:00

48 lines
1.4 KiB
C

/*
* Copyright 2014 Freescale Semiconductor, Inc.
*
* SPDX-License-Identifier: GPL-2.0+
*
*/
#ifndef __JOBDESC_H
#define __JOBDESC_H
#include <common.h>
#include <asm/io.h>
#include "rsa_caam.h"
#define KEY_IDNFR_SZ_BYTES 16
#ifdef CONFIG_CMD_DEKBLOB
/* inline_cnstr_jobdesc_blob_dek:
* Intializes and constructs the job descriptor for DEK encapsulation
* using the given parameters.
* @desc: reference to the job descriptor
* @plain_txt: reference to the DEK
* @enc_blob: reference where to store the blob
* @in_sz: size in bytes of the DEK
* @return: 0 on success, ECONSTRJDESC otherwise
*/
int inline_cnstr_jobdesc_blob_dek(uint32_t *desc, const uint8_t *plain_txt,
uint8_t *enc_blob, uint32_t in_sz);
#endif
void inline_cnstr_jobdesc_hash(uint32_t *desc,
const uint8_t *msg, uint32_t msgsz, uint8_t *digest,
u32 alg_type, uint32_t alg_size, int sg_tbl);
void inline_cnstr_jobdesc_blob_encap(uint32_t *desc, uint8_t *key_idnfr,
uint8_t *plain_txt, uint8_t *enc_blob,
uint32_t in_sz);
void inline_cnstr_jobdesc_blob_decap(uint32_t *desc, uint8_t *key_idnfr,
uint8_t *enc_blob, uint8_t *plain_txt,
uint32_t out_sz);
void inline_cnstr_jobdesc_rng_instantiation(uint32_t *desc);
void inline_cnstr_jobdesc_pkha_rsaexp(uint32_t *desc,
struct pk_in_params *pkin, uint8_t *out,
uint32_t out_siz);
#endif