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crypto: lib/aes - export sbox and inverse sbox 

There are a few copies of the AES S-boxes floating around, so export
the ones from the AES library so that we can reuse them in other
modules.

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 2019-07-02 21:41:46 +02:00 committed by Herbert Xu
parent 1e25ca02a0
commit 9467a3150c
2 changed files with 9 additions and 0 deletions
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3
include/crypto/aes.h
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@ -67,4 +67,7 @@ void aes_encrypt(const struct crypto_aes_ctx *ctx, u8 *out, const u8 *in);
*/
void aes_decrypt(const struct crypto_aes_ctx *ctx, u8 *out, const u8 *in);
extern const u8 crypto_aes_sbox[];
extern const u8 crypto_aes_inv_sbox[];
#endif

6
lib/crypto/aes.c
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@ -82,6 +82,12 @@ static volatile const u8 __cacheline_aligned aes_inv_sbox[] = {
0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d,
};
extern const u8 crypto_aes_sbox[256] __alias(aes_sbox);
extern const u8 crypto_aes_inv_sbox[256] __alias(aes_inv_sbox);
EXPORT_SYMBOL(crypto_aes_sbox);
EXPORT_SYMBOL(crypto_aes_inv_sbox);
static u32 mul_by_x(u32 w)
{
u32 x = w & 0x7f7f7f7f;