1CFG_CRYPTO ?= y 2# Select small code size in the crypto library if applicable (for instance 3# LibTomCrypt has -DLTC_SMALL_CODE) 4# Note: the compiler flag -Os is not set here but by CFG_CC_OPTIMIZE_FOR_SIZE 5CFG_CRYPTO_SIZE_OPTIMIZATION ?= y 6 7ifeq (y,$(CFG_CRYPTO)) 8 9# Ciphers 10CFG_CRYPTO_AES ?= y 11CFG_CRYPTO_DES ?= y 12 13# Cipher block modes 14CFG_CRYPTO_ECB ?= y 15CFG_CRYPTO_CBC ?= y 16CFG_CRYPTO_CTR ?= y 17CFG_CRYPTO_CTS ?= y 18CFG_CRYPTO_XTS ?= y 19 20# Message authentication codes 21CFG_CRYPTO_HMAC ?= y 22CFG_CRYPTO_CMAC ?= y 23CFG_CRYPTO_CBC_MAC ?= y 24 25# Hashes 26CFG_CRYPTO_MD5 ?= y 27CFG_CRYPTO_SHA1 ?= y 28CFG_CRYPTO_SHA224 ?= y 29CFG_CRYPTO_SHA256 ?= y 30CFG_CRYPTO_SHA384 ?= y 31CFG_CRYPTO_SHA512 ?= y 32CFG_CRYPTO_SHA512_256 ?= y 33 34# Asymmetric ciphers 35CFG_CRYPTO_DSA ?= y 36CFG_CRYPTO_RSA ?= y 37CFG_CRYPTO_DH ?= y 38CFG_CRYPTO_ECC ?= y 39 40# Authenticated encryption 41CFG_CRYPTO_CCM ?= y 42CFG_CRYPTO_GCM ?= y 43# Default uses the OP-TEE internal AES-GCM implementation 44CFG_CRYPTO_AES_GCM_FROM_CRYPTOLIB ?= n 45 46endif 47 48ifeq ($(CFG_WITH_PAGER),y) 49ifneq ($(CFG_CRYPTO_SHA256),y) 50$(warning Warning: Enabling CFG_CRYPTO_SHA256 [required by CFG_WITH_PAGER]) 51CFG_CRYPTO_SHA256:=y 52endif 53endif 54 55$(eval $(call cryp-enable-all-depends,CFG_WITH_SOFTWARE_PRNG, AES ECB SHA256)) 56 57ifeq ($(CFG_CRYPTO_WITH_CE),y) 58 59$(call force,CFG_AES_GCM_TABLE_BASED,n,conflicts with CFG_CRYPTO_WITH_CE) 60 61# CFG_HWSUPP_PMULT_64 defines whether the CPU supports polynomial multiplies 62# of 64-bit values (Aarch64: PMULL/PMULL2 with the 1Q specifier; Aarch32: 63# VMULL.P64). These operations are part of the Cryptographic Extensions, so 64# assume they are implicitly contained in CFG_CRYPTO_WITH_CE=y. 65CFG_HWSUPP_PMULT_64 ?= y 66 67ifeq ($(CFG_ARM32_core),y) 68CFG_CRYPTO_AES_ARM32_CE ?= $(CFG_CRYPTO_AES) 69CFG_CRYPTO_SHA1_ARM32_CE ?= $(CFG_CRYPTO_SHA1) 70CFG_CRYPTO_SHA256_ARM32_CE ?= $(CFG_CRYPTO_SHA256) 71endif 72 73ifeq ($(CFG_ARM64_core),y) 74CFG_CRYPTO_AES_ARM64_CE ?= $(CFG_CRYPTO_AES) 75CFG_CRYPTO_SHA1_ARM64_CE ?= $(CFG_CRYPTO_SHA1) 76CFG_CRYPTO_SHA256_ARM64_CE ?= $(CFG_CRYPTO_SHA256) 77endif 78 79else #CFG_CRYPTO_WITH_CE 80 81CFG_AES_GCM_TABLE_BASED ?= y 82 83endif #!CFG_CRYPTO_WITH_CE 84 85 86# Cryptographic extensions can only be used safely when OP-TEE knows how to 87# preserve the VFP context 88ifeq ($(CFG_CRYPTO_SHA256_ARM32_CE),y) 89$(call force,CFG_WITH_VFP,y,required by CFG_CRYPTO_SHA256_ARM32_CE) 90endif 91ifeq ($(CFG_CRYPTO_SHA256_ARM64_CE),y) 92$(call force,CFG_WITH_VFP,y,required by CFG_CRYPTO_SHA256_ARM64_CE) 93endif 94ifeq ($(CFG_CRYPTO_SHA1_ARM32_CE),y) 95$(call force,CFG_WITH_VFP,y,required by CFG_CRYPTO_SHA1_ARM32_CE) 96endif 97ifeq ($(CFG_CRYPTO_SHA1_ARM64_CE),y) 98$(call force,CFG_WITH_VFP,y,required by CFG_CRYPTO_SHA1_ARM64_CE) 99endif 100ifeq ($(CFG_CRYPTO_AES_ARM64_CE),y) 101$(call force,CFG_WITH_VFP,y,required by CFG_CRYPTO_AES_ARM64_CE) 102endif 103 104cryp-enable-all-depends = $(call cfg-enable-all-depends,$(strip $(1)),$(foreach v,$(2),CFG_CRYPTO_$(v))) 105$(eval $(call cryp-enable-all-depends,CFG_REE_FS, AES ECB CTR HMAC SHA256 GCM)) 106$(eval $(call cryp-enable-all-depends,CFG_RPMB_FS, AES ECB CTR HMAC SHA256 GCM)) 107 108# Dependency checks: warn and disable some features if dependencies are not met 109 110cryp-dep-one = $(call cfg-depends-one,CFG_CRYPTO_$(strip $(1)),$(patsubst %, CFG_CRYPTO_%,$(strip $(2)))) 111cryp-dep-all = $(call cfg-depends-all,CFG_CRYPTO_$(strip $(1)),$(patsubst %, CFG_CRYPTO_%,$(strip $(2)))) 112 113$(eval $(call cryp-dep-one, ECB, AES DES)) 114$(eval $(call cryp-dep-one, CBC, AES DES)) 115$(eval $(call cryp-dep-one, CTR, AES)) 116# CTS is implemented with ECB and CBC 117$(eval $(call cryp-dep-all, CTS, AES ECB CBC)) 118$(eval $(call cryp-dep-one, XTS, AES)) 119$(eval $(call cryp-dep-one, HMAC, AES DES)) 120$(eval $(call cryp-dep-one, HMAC, MD5 SHA1 SHA224 SHA256 SHA384 SHA512)) 121$(eval $(call cryp-dep-one, CMAC, AES)) 122$(eval $(call cryp-dep-one, CBC_MAC, AES DES)) 123$(eval $(call cryp-dep-one, CCM, AES)) 124$(eval $(call cryp-dep-one, GCM, AES)) 125# If no AES cipher mode is left, disable AES 126$(eval $(call cryp-dep-one, AES, ECB CBC CTR CTS XTS)) 127# If no DES cipher mode is left, disable DES 128$(eval $(call cryp-dep-one, DES, ECB CBC)) 129 130############################################################### 131# libtomcrypt (LTC) specifics, phase #1 132# LTC is only configured via _CFG_CORE_LTC_ prefixed variables 133# 134# _CFG_CORE_LTC_xxx_DESC means that LTC will only register the 135# descriptor of the algorithm, not provide a 136# crypt_xxx_alloc_ctx() function. 137############################################################### 138 139# If LTC is the cryptolib, pull configuration from CFG_CRYPTO_xxx 140ifeq ($(CFG_CRYPTOLIB_NAME),tomcrypt) 141# dsa_make_params() needs all three SHA-2 algorithms. 142# Disable DSA if any is missing. 143$(eval $(call cryp-dep-all, DSA, SHA256 SHA384 SHA512)) 144 145# Assign _CFG_CORE_LTC_xxx based on CFG_CRYPTO_yyy 146core-ltc-vars = AES DES 147core-ltc-vars += ECB CBC CTR CTS XTS 148core-ltc-vars += MD5 SHA1 SHA224 SHA256 SHA384 SHA512 SHA512_256 149core-ltc-vars += HMAC CMAC CBC_MAC 150core-ltc-vars += CCM 151ifeq ($(CFG_CRYPTO_AES_GCM_FROM_CRYPTOLIB),y) 152core-ltc-vars += GCM 153endif 154core-ltc-vars += RSA DSA DH ECC 155core-ltc-vars += AES_ARM64_CE AES_ARM32_CE 156core-ltc-vars += SHA1_ARM32_CE SHA1_ARM64_CE 157core-ltc-vars += SHA256_ARM32_CE SHA256_ARM64_CE 158core-ltc-vars += SIZE_OPTIMIZATION 159# Assigned selected CFG_CRYPTO_xxx as _CFG_CORE_LTC_xxx 160$(foreach v, $(core-ltc-vars), $(eval _CFG_CORE_LTC_$(v) := $(CFG_CRYPTO_$(v)))) 161_CFG_CORE_LTC_MPI := $(CFG_CORE_MBEDTLS_MPI) 162endif 163 164############################################################### 165# mbedtls specifics 166############################################################### 167 168ifeq ($(CFG_CRYPTOLIB_NAME),mbedtls) 169# mbedtls has to be complemented with some algorithms by LTC 170# Specify the algorithms here 171_CFG_CORE_LTC_DSA := $(CFG_CRYPTO_DSA) 172_CFG_CORE_LTC_MPI := $(CFG_CRYPTO_DSA) 173_CFG_CORE_LTC_SHA256_DESC := $(CFG_CRYPTO_DSA) 174_CFG_CORE_LTC_SHA384_DESC := $(CFG_CRYPTO_DSA) 175_CFG_CORE_LTC_SHA512_DESC := $(CFG_CRYPTO_DSA) 176_CFG_CORE_LTC_XTS := $(CFG_CRYPTO_XTS) 177_CFG_CORE_LTC_CCM := $(CFG_CRYPTO_CCM) 178_CFG_CORE_LTC_AES_DESC := $(call cfg-one-enabled, CFG_CRYPTO_XTS CFG_CRYPTO_CCM) 179endif 180 181############################################################### 182# libtomcrypt (LTC) specifics, phase #2 183############################################################### 184 185# Assign system variables 186_CFG_CORE_LTC_CE := $(CFG_CRYPTO_WITH_CE) 187_CFG_CORE_LTC_VFP := $(CFG_WITH_VFP) 188_CFG_CORE_LTC_BIGNUM_MAX_BITS := $(CFG_CORE_BIGNUM_MAX_BITS) 189_CFG_CORE_LTC_PAGER := $(CFG_WITH_PAGER) 190_CFG_CORE_LTC_OPTEE_THREAD := $(CFG_LTC_OPTEE_THREAD) 191_CFG_CORE_LTC_HWSUPP_PMULL := $(CFG_HWSUPP_PMULL) 192 193# Assign aggregated variables 194ltc-one-enabled = $(call cfg-one-enabled,$(foreach v,$(1),_CFG_CORE_LTC_$(v))) 195_CFG_CORE_LTC_ACIPHER := $(call ltc-one-enabled, RSA DSA DH ECC) 196_CFG_CORE_LTC_AUTHENC := $(and $(filter y,$(_CFG_CORE_LTC_AES) \ 197 $(_CFG_CORE_LTC_AES_DESC)), \ 198 $(call ltc-one-enabled, CCM GCM)) 199_CFG_CORE_LTC_CIPHER := $(call ltc-one-enabled, AES AES_DESC DES) 200_CFG_CORE_LTC_HASH := $(call ltc-one-enabled, MD5 SHA1 SHA224 SHA256 SHA384 \ 201 SHA512) 202_CFG_CORE_LTC_MAC := $(call ltc-one-enabled, HMAC CMAC CBC_MAC) 203_CFG_CORE_LTC_CBC := $(call ltc-one-enabled, CBC CBC_MAC) 204_CFG_CORE_LTC_ASN1 := $(call ltc-one-enabled, RSA DSA ECC) 205