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config RSA
bool "Use RSA Library"
select RSA_FREESCALE_EXP if FSL_CAAM && !ARCH_MX7 && !ARCH_MX7ULP && !ARCH_MX6 && !ARCH_MX5
select RSA_ASPEED_EXP if ASPEED_ACRY
select RSA_SOFTWARE_EXP if !RSA_FREESCALE_EXP && !RSA_ASPEED_EXP
help
RSA support. This enables the RSA algorithm used for FIT image
verification in U-Boot.
See doc/uImage.FIT/signature.txt for more details.
The Modular Exponentiation algorithm in RSA is implemented using
driver model. So CONFIG_DM needs to be enabled by default for this
library to function.
The signing part is build into mkimage regardless of this
option. The software based modular exponentiation is built into
mkimage irrespective of this option.
if RSA
config SPL_RSA
bool "Use RSA Library within SPL"
depends on SPL
config SPL_RSA_VERIFY
bool
depends on SPL_RSA
help
Add RSA signature verification support in SPL.
config RSA_VERIFY
bool
help
Add RSA signature verification support.
config RSA_VERIFY_WITH_PKEY
bool "Execute RSA verification without key parameters from FDT"
select RSA_VERIFY
select ASYMMETRIC_KEY_TYPE
select ASYMMETRIC_PUBLIC_KEY_SUBTYPE
select RSA_PUBLIC_KEY_PARSER
help
The standard RSA-signature verification code (FIT_SIGNATURE) uses
pre-calculated key properties, that are stored in fdt blob, in
decrypting a signature.
This does not suit the use case where there is no way defined to
provide such additional key properties in standardized form,
particularly UEFI secure boot.
This options enables RSA signature verification with a public key
directly specified in image_sign_info, where all the necessary
key properties will be calculated on the fly in verification code.
config SPL_RSA_VERIFY_WITH_PKEY
bool "Execute RSA verification without key parameters from FDT within SPL"
depends on SPL
select SPL_RSA_VERIFY
select SPL_ASYMMETRIC_KEY_TYPE
select SPL_ASYMMETRIC_PUBLIC_KEY_SUBTYPE
select SPL_RSA_PUBLIC_KEY_PARSER
help
The standard RSA-signature verification code (FIT_SIGNATURE) uses
pre-calculated key properties, that are stored in fdt blob, in
decrypting a signature.
This does not suit the use case where there is no way defined to
provide such additional key properties in standardized form,
particularly UEFI secure boot.
This options enables RSA signature verification with a public key
directly specified in image_sign_info, where all the necessary
key properties will be calculated on the fly in verification code
in the SPL.
config RSA_SOFTWARE_EXP
bool "Enable driver for RSA Modular Exponentiation in software"
depends on DM
help
Enables driver for modular exponentiation in software. This is a RSA
algorithm used in FIT image verification. It required RSA Key as
input.
See doc/uImage.FIT/signature.txt for more details.
config RSA_FREESCALE_EXP
bool "Enable RSA Modular Exponentiation with FSL crypto accelerator"
depends on DM && FSL_CAAM && !ARCH_MX7 && !ARCH_MX7ULP && !ARCH_MX6 && !ARCH_MX5
help
Enables driver for RSA modular exponentiation using Freescale cryptographic
accelerator - CAAM.
config RSA_ASPEED_EXP
bool "Enable RSA Modular Exponentiation with ASPEED crypto accelerator"
depends on DM && ASPEED_ACRY
help
Enables driver for RSA modular exponentiation using ASPEED cryptographic
accelerator - ACRY
endif
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