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crypto: arm64/aes-cipher - move S-box to .rodata section 

Move the AES inverse S-box to the .rodata section where it is safe from
abuse by speculation.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Ard Biesheuvel 2018-01-10 12:11:37 +00:00 committed by Herbert Xu
parent cd0bb67f21
commit 96a74f7bdc
1 changed files with 10 additions and 9 deletions
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19
arch/arm64/crypto/aes-cipher-core.S
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@ -125,6 +125,16 @@ CPU_BE( rev w7, w7 )
ret
.endm
ENTRY(__aes_arm64_encrypt)
do_crypt fround, crypto_ft_tab, crypto_ft_tab + 1, 2
ENDPROC(__aes_arm64_encrypt)
.align 5
ENTRY(__aes_arm64_decrypt)
do_crypt iround, crypto_it_tab, __aes_arm64_inverse_sbox, 0
ENDPROC(__aes_arm64_decrypt)
.section ".rodata", "a"
.align L1_CACHE_SHIFT
.type __aes_arm64_inverse_sbox, %object
__aes_arm64_inverse_sbox:
@ -161,12 +171,3 @@ __aes_arm64_inverse_sbox:
.byte 0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26
.byte 0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d
.size __aes_arm64_inverse_sbox, . - __aes_arm64_inverse_sbox
ENTRY(__aes_arm64_encrypt)
do_crypt fround, crypto_ft_tab, crypto_ft_tab + 1, 2
ENDPROC(__aes_arm64_encrypt)
.align 5
ENTRY(__aes_arm64_decrypt)
do_crypt iround, crypto_it_tab, __aes_arm64_inverse_sbox, 0
ENDPROC(__aes_arm64_decrypt)