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From:   Ard Biesheuvel <ard.biesheuvel@linaro.org>
To:     linux-crypto@vger.kernel.org
Cc:     herbert@gondor.apana.org.au, ebiggers@google.com,
        Ard Biesheuvel <ard.biesheuvel@linaro.org>
Subject: [PATCH v4 28/32] crypto: lib/aes - export sbox and inverse sbox
Date:   Tue,  2 Jul 2019 21:41:46 +0200
Message-Id: <20190702194150.10405-29-ard.biesheuvel@linaro.org>
In-Reply-To: <20190702194150.10405-1-ard.biesheuvel@linaro.org>
References: <20190702194150.10405-1-ard.biesheuvel@linaro.org>
Sender: linux-crypto-owner@vger.kernel.org
Precedence: bulk

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>
---
 include/crypto/aes.h | 3 +++
 lib/crypto/aes.c     | 6 ++++++
 2 files changed, 9 insertions(+)

diff --git a/include/crypto/aes.h b/include/crypto/aes.h
index df8426fd8051..8e0f4cf948e5 100644
--- a/include/crypto/aes.h
+++ b/include/crypto/aes.h
@@ -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
diff --git a/lib/crypto/aes.c b/lib/crypto/aes.c
index 9928b23e0a8a..4e100af38c51 100644
--- a/lib/crypto/aes.c
+++ b/lib/crypto/aes.c
@@ -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;
-- 
2.17.1