1config RSA 2 bool "Use RSA Library" 3 select RSA_FREESCALE_EXP if FSL_CAAM 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 17config RSA_SOFTWARE_EXP 18 bool "Enable driver for RSA Modular Exponentiation in software" 19 depends on DM && RSA 20 help 21 Enables driver for modular exponentiation in software. This is a RSA 22 algorithm used in FIT image verification. It required RSA Key as 23 input. 24 See doc/uImage.FIT/signature.txt for more details. 25 26config RSA_FREESCALE_EXP 27 bool "Enable RSA Modular Exponentiation with FSL crypto accelerator" 28 depends on DM && RSA && FSL_CAAM 29 help 30 Enables driver for RSA modular exponentiation using Freescale cryptographic 31 accelerator - CAAM. 32 33endif 34