1config RSA 2 bool "Use RSA Library" 3 select RSA_FREESCALE_EXP if FSL_CAAM && !ARCH_MX7 && !ARCH_MX6 && !ARCH_MX5 4 select RSA_SOFTWARE_EXP if !RSA_FREESCALE_EXP 5 help 6 RSA support. This enables the RSA algorithm used for FIT image 7 verification in U-Boot. 8 See doc/uImage.FIT/signature.txt for more details. 9 The Modular Exponentiation algorithm in RSA is implemented using 10 driver model. So CONFIG_DM needs to be enabled by default for this 11 library to function. 12 The signing part is build into mkimage regardless of this 13 option. The software based modular exponentiation is built into 14 mkimage irrespective of this option. 15 16if RSA 17 18config SPL_RSA 19 bool "Use RSA Library within SPL" 20 21config RSA_SOFTWARE_EXP 22 bool "Enable driver for RSA Modular Exponentiation in software" 23 depends on DM 24 help 25 Enables driver for modular exponentiation in software. This is a RSA 26 algorithm used in FIT image verification. It required RSA Key as 27 input. 28 See doc/uImage.FIT/signature.txt for more details. 29 30config RSA_FREESCALE_EXP 31 bool "Enable RSA Modular Exponentiation with FSL crypto accelerator" 32 depends on DM && FSL_CAAM && !ARCH_MX7 && !ARCH_MX6 && !ARCH_MX5 33 help 34 Enables driver for RSA modular exponentiation using Freescale cryptographic 35 accelerator - CAAM. 36 37endif 38