Chain of Trust is enabled for ARM platforms (LS1021 and LS1043).
In board_late_init(), fsl_setenv_chain_of_trust() is called which
will perform the following:
- If boot mode is non-secure, return (No Change)
- If boot mode is secure, set the following environmet variables:
bootdelay = 0 (To disable Boot Prompt)
bootcmd = CONFIG_CHAIN_BOOT_CMD (Validate and execute Boot script)
Signed-off-by: Aneesh Bansal <aneesh.bansal@nxp.com>
Acked-by: Ruchika Gupta <ruchika.gupta@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>
Some images to be validated are relocated to a dynamic
address at run time. So, these addresses cannot be known
befor hand while signing the images and creating the header
offline.
So, support is required to pass the image address to the
validate function as an argument.
If an address is provided to the function, the address
field in Header is not read and is treated as a reserved
field.
Signed-off-by: Saksham Jain <saksham@freescale.com>
Signed-off-by: Aneesh Bansal <aneesh.bansal@freescale.com>
Acked-by: Ruchika Gupta <ruchika.gupta@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>
The prototype and defination of function fsl_secboot_validate
has been changed to support calling this function from another
function within u-boot.
Only two aruments needed:
1) header address - Mandatory
2) SHA256 string - optional
Signed-off-by: Saksham Jain <saksham@freescale.com>
Signed-off-by: Aneesh Bansal <aneesh.bansal@freescale.com>
Acked-by: Ruchika Gupta <ruchika.gupta@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>
LS1043ARDB Secure Boot Target from NOR has been added.
- Configs defined to enable esbc_validate.
- ESBC Address in header is made 64 bit.
- SMMU is re-configured in Bypass mode.
Signed-off-by: Aneesh Bansal <aneesh.bansal@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>
For the Chain of Trust, the esbc_validate command supports
32 bit fields for location of the image. In the header structure
definition, these were declared as pointers which made them
64 bit on a 64 bit core.
Signed-off-by: Aneesh Bansal <aneesh.bansal@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>
1. esbc_validate command is meant for validating header and
signature of images (Boot Script and ESBC uboot client).
SHA-256 and RSA operations are performed using SEC block in HW.
This command works on both PBL based and Non PBL based Freescale
platforms.
Command usage:
esbc_validate img_hdr_addr [pub_key_hash]
2. ESBC uboot client can be linux. Additionally, rootfs and device
tree blob can also be signed.
3. In the event of header or signature failure in validation,
ITS and ITF bits determine further course of action.
4. In case of soft failure, appropriate error is dumped on console.
5. In case of hard failure, SoC is issued RESET REQUEST after
dumping error on the console.
6. KEY REVOCATION Feature:
QorIQ platforms like B4/T4 have support of srk key table and key
revocation in ISBC code in Silicon.
The srk key table allows the user to have a key table with multiple
keys and revoke any key in case of particular key gets compromised.
In case the ISBC code uses the key revocation and srk key table to
verify the u-boot code, the subsequent chain of trust should also
use the same.
6. ISBC KEY EXTENSION Feature:
This feature allows large number of keys to be used for esbc validation
of images. A set of public keys is being signed and validated by ISBC
which can be further used for esbc validation of images.
Signed-off-by: Ruchika Gupta <ruchika.gupta@freescale.com>
Signed-off-by: Gaurav Rana <gaurav.rana@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>
Aneesh Bansal
Aneesh Bansal
gaurav rana