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0200020bc2
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>
48 lines
1.4 KiB
C
48 lines
1.4 KiB
C
/*
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* Copyright 2014 Freescale Semiconductor, Inc.
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*
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* SPDX-License-Identifier: GPL-2.0+
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*
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*/
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#ifndef __JOBDESC_H
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#define __JOBDESC_H
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#include <common.h>
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#include <asm/io.h>
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#include "rsa_caam.h"
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#define KEY_IDNFR_SZ_BYTES 16
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#ifdef CONFIG_CMD_DEKBLOB
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/* inline_cnstr_jobdesc_blob_dek:
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* Intializes and constructs the job descriptor for DEK encapsulation
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* using the given parameters.
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* @desc: reference to the job descriptor
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* @plain_txt: reference to the DEK
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* @enc_blob: reference where to store the blob
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* @in_sz: size in bytes of the DEK
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* @return: 0 on success, ECONSTRJDESC otherwise
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*/
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int inline_cnstr_jobdesc_blob_dek(uint32_t *desc, const uint8_t *plain_txt,
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uint8_t *enc_blob, uint32_t in_sz);
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#endif
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void inline_cnstr_jobdesc_hash(uint32_t *desc,
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const uint8_t *msg, uint32_t msgsz, uint8_t *digest,
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u32 alg_type, uint32_t alg_size, int sg_tbl);
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void inline_cnstr_jobdesc_blob_encap(uint32_t *desc, uint8_t *key_idnfr,
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uint8_t *plain_txt, uint8_t *enc_blob,
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uint32_t in_sz);
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void inline_cnstr_jobdesc_blob_decap(uint32_t *desc, uint8_t *key_idnfr,
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uint8_t *enc_blob, uint8_t *plain_txt,
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uint32_t out_sz);
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void inline_cnstr_jobdesc_rng_instantiation(uint32_t *desc);
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void inline_cnstr_jobdesc_pkha_rsaexp(uint32_t *desc,
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struct pk_in_params *pkin, uint8_t *out,
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uint32_t out_siz);
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#endif
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