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| author | Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2018-01-10 15:11:37 +0300 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2018-01-18 15:00:30 +0300 |
| commit | 96a74f7bdc9c1326a06b69797725a285e9282cb3 (patch) | |
| tree | 45f30dee45c21d8171287cf5619151dfbcba143b /arch/arm64/crypto | |
| parent | cd0bb67f21dadaf0a0240776f6e39a14b4f7625b (diff) | |
| download | linux-96a74f7bdc9c1326a06b69797725a285e9282cb3.tar.xz | |
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>
Diffstat (limited to 'arch/arm64/crypto')
| -rw-r--r-- | arch/arm64/crypto/aes-cipher-core.S | 19 |
1 files changed, 10 insertions, 9 deletions
diff --git a/arch/arm64/crypto/aes-cipher-core.S b/arch/arm64/crypto/aes-cipher-core.S index 6d2445d603cc..3a44eada2347 100644 --- a/arch/arm64/crypto/aes-cipher-core.S +++ b/arch/arm64/crypto/aes-cipher-core.S @@ -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) |