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https://github.com/AsahiLinux/u-boot
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ac55dadb1c
For validating images from uboot (Such as Kernel Image), either keys from SoC fuses can be used or keys from a verified table of public keys can be used. The latter feature is called IE Key Extension Feature. For Layerscape Chasis 3 based platforms, IE table is validated by Bootrom and address of this table is written in scratch registers 13 and 14 via PBI commands. Following are the steps describing usage of this feature: 1) Verify IE Table in ISBC phase using keys stored in fuses. 2) Install IE table. (To be used across verification of multiple images stored in a static global structure.) 3) Use keys from IE table, to verify further images. Signed-off-by: Aneesh Bansal <aneesh.bansal@nxp.com> Signed-off-by: Saksham Jain <saksham.jain@nxp.com> Signed-off-by: Udit Agarwal <udit.agarwal@nxp.com> Reviewed-by: York Sun <york.sun@nxp.com>
284 lines
6.2 KiB
C
284 lines
6.2 KiB
C
/*
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* Copyright 2015 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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#ifndef _FSL_VALIDATE_H_
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#define _FSL_VALIDATE_H_
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#include <fsl_sec.h>
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#include <fsl_sec_mon.h>
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#include <command.h>
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#include <linux/types.h>
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#define WORD_SIZE 4
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/* Minimum and maximum size of RSA signature length in bits */
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#define KEY_SIZE 4096
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#define KEY_SIZE_BYTES (KEY_SIZE/8)
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#define KEY_SIZE_WORDS (KEY_SIZE_BYTES/(WORD_SIZE))
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extern struct jobring jr;
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/* Barker code size in bytes */
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#define ESBC_BARKER_LEN 4 /* barker code length in ESBC uboot client */
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/* header */
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/* No-error return values */
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#define ESBC_VALID_HDR 0 /* header is valid */
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/* Maximum number of SG entries allowed */
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#define MAX_SG_ENTRIES 8
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/* Different Header Struct for LS-CH3 */
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#ifdef CONFIG_ESBC_HDR_LS
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struct fsl_secboot_img_hdr {
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u8 barker[ESBC_BARKER_LEN]; /* barker code */
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u32 srk_tbl_off;
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struct {
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u8 num_srk;
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u8 srk_sel;
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u8 reserve;
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} len_kr;
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u8 ie_flag;
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u32 uid_flag;
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u32 psign; /* signature offset */
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u32 sign_len; /* length of the signature in bytes */
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u64 pimg64; /* 64 bit pointer to ESBC Image */
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u32 img_size; /* ESBC client image size in bytes */
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u32 ie_key_sel;
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u32 fsl_uid_0;
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u32 fsl_uid_1;
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u32 oem_uid_0;
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u32 oem_uid_1;
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u32 oem_uid_2;
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u32 oem_uid_3;
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u32 oem_uid_4;
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u32 reserved1[3];
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};
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#ifdef CONFIG_KEY_REVOCATION
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/* Srk table and key revocation check */
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#define UNREVOCABLE_KEY 8
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#define ALIGN_REVOC_KEY 7
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#define MAX_KEY_ENTRIES 8
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#endif
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#if defined(CONFIG_FSL_ISBC_KEY_EXT)
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#define IE_FLAG_MASK 0x1
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#define SCRATCH_IE_LOW_ADR 13
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#define SCRATCH_IE_HIGH_ADR 14
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#endif
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#else /* CONFIG_ESBC_HDR_LS */
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/*
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* ESBC uboot client header structure.
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* The struct contain the following fields
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* barker code
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* public key offset
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* pub key length
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* signature offset
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* length of the signature
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* ptr to SG table
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* no of entries in SG table
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* esbc ptr
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* size of esbc
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* esbc entry point
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* Scatter gather flag
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* UID flag
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* FSL UID
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* OEM UID
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* Here, pub key is modulus concatenated with exponent
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* of equal length
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*/
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struct fsl_secboot_img_hdr {
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u8 barker[ESBC_BARKER_LEN]; /* barker code */
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union {
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u32 pkey; /* public key offset */
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#ifdef CONFIG_KEY_REVOCATION
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u32 srk_tbl_off;
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#endif
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};
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union {
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u32 key_len; /* pub key length in bytes */
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#ifdef CONFIG_KEY_REVOCATION
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struct {
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u32 srk_table_flag:8;
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u32 srk_sel:8;
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u32 num_srk:16;
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} len_kr;
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#endif
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};
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u32 psign; /* signature offset */
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u32 sign_len; /* length of the signature in bytes */
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union {
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u32 psgtable; /* ptr to SG table */
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#ifndef CONFIG_ESBC_ADDR_64BIT
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u32 pimg; /* ptr to ESBC client image */
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#endif
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};
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union {
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u32 sg_entries; /* no of entries in SG table */
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u32 img_size; /* ESBC client image size in bytes */
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};
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u32 img_start; /* ESBC client entry point */
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u32 sg_flag; /* Scatter gather flag */
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u32 uid_flag;
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u32 fsl_uid_0;
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u32 oem_uid_0;
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u32 reserved1[2];
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u32 fsl_uid_1;
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u32 oem_uid_1;
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union {
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u32 reserved2[2];
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#ifdef CONFIG_ESBC_ADDR_64BIT
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u64 pimg64; /* 64 bit pointer to ESBC Image */
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#endif
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};
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u32 ie_flag;
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u32 ie_key_sel;
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};
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#ifdef CONFIG_KEY_REVOCATION
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/* Srk table and key revocation check */
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#define SRK_FLAG 0x01
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#define UNREVOCABLE_KEY 4
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#define ALIGN_REVOC_KEY 3
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#define MAX_KEY_ENTRIES 4
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#endif
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#if defined(CONFIG_FSL_ISBC_KEY_EXT)
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#define IE_FLAG_MASK 0xFFFFFFFF
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#endif
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#endif /* CONFIG_ESBC_HDR_LS */
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#if defined(CONFIG_FSL_ISBC_KEY_EXT)
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struct ie_key_table {
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u32 key_len;
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u8 pkey[2 * KEY_SIZE_BYTES];
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};
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struct ie_key_info {
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uint32_t key_revok;
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uint32_t num_keys;
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struct ie_key_table ie_key_tbl[32];
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};
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#endif
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#ifdef CONFIG_KEY_REVOCATION
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struct srk_table {
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u32 key_len;
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u8 pkey[2 * KEY_SIZE_BYTES];
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};
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#endif
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/*
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* SG table.
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*/
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#if defined(CONFIG_FSL_TRUST_ARCH_v1) && defined(CONFIG_FSL_CORENET)
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/*
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* This struct contains the following fields
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* length of the segment
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* source address
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*/
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struct fsl_secboot_sg_table {
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u32 len; /* length of the segment in bytes */
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u32 src_addr; /* ptr to the data segment */
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};
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#else
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/*
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* This struct contains the following fields
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* length of the segment
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* Destination Target ID
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* source address
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* destination address
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*/
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struct fsl_secboot_sg_table {
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u32 len;
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u32 trgt_id;
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u32 src_addr;
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u32 dst_addr;
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};
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#endif
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/* ESBC global structure.
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* Data to be used across verification of different images.
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* Stores follwoing Data:
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* IE Table
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*/
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struct fsl_secboot_glb {
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#if defined(CONFIG_FSL_ISBC_KEY_EXT)
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uintptr_t ie_addr;
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struct ie_key_info ie_tbl;
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#endif
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};
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/*
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* ESBC private structure.
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* Private structure used by ESBC to store following fields
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* ESBC client key
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* ESBC client key hash
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* ESBC client Signature
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* Encoded hash recovered from signature
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* Encoded hash of ESBC client header plus ESBC client image
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*/
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struct fsl_secboot_img_priv {
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uint32_t hdr_location;
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uintptr_t ie_addr;
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u32 key_len;
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struct fsl_secboot_img_hdr hdr;
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u8 img_key[2 * KEY_SIZE_BYTES]; /* ESBC client key */
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u8 img_key_hash[32]; /* ESBC client key hash */
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#ifdef CONFIG_KEY_REVOCATION
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struct srk_table srk_tbl[MAX_KEY_ENTRIES];
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#endif
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u8 img_sign[KEY_SIZE_BYTES]; /* ESBC client signature */
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u8 img_encoded_hash[KEY_SIZE_BYTES]; /* EM wrt RSA PKCSv1.5 */
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/* Includes hash recovered after
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* signature verification
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*/
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u8 img_encoded_hash_second[KEY_SIZE_BYTES];/* EM' wrt RSA PKCSv1.5 */
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/* Includes hash of
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* ESBC client header plus
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* ESBC client image
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*/
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struct fsl_secboot_sg_table sgtbl[MAX_SG_ENTRIES]; /* SG table */
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uintptr_t ehdrloc; /* ESBC Header location */
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uintptr_t *img_addr_ptr; /* ESBC Image Location */
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uint32_t img_size; /* ESBC Image Size */
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};
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int do_esbc_halt(cmd_tbl_t *cmdtp, int flag, int argc,
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char * const argv[]);
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int fsl_secboot_validate(uintptr_t haddr, char *arg_hash_str,
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uintptr_t *img_addr_ptr);
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int fsl_secboot_blob_encap(cmd_tbl_t *cmdtp, int flag, int argc,
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char * const argv[]);
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int fsl_secboot_blob_decap(cmd_tbl_t *cmdtp, int flag, int argc,
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char * const argv[]);
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int fsl_check_boot_mode_secure(void);
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int fsl_setenv_chain_of_trust(void);
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/*
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* This function is used to validate the main U-boot binary from
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* SPL just before passing control to it using QorIQ Trust
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* Architecture header (appended to U-boot image).
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*/
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void spl_validate_uboot(uint32_t hdr_addr, uintptr_t img_addr);
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#endif
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