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authorArd Biesheuvel <ard.biesheuvel@linaro.org>2019-07-02 21:41:36 +0200
committerHerbert Xu <herbert@gondor.apana.org.au>2019-07-26 14:58:09 +1000
commit4d3f9d89c745ea5494ea23e545385af1b6f81363 (patch)
treec9c9599310f3f6976d154d162a67dc3e09da8089 /arch/arm64/crypto
parentff6f4115cb953c5be8d7a76b2ec1877df2f4c2c0 (diff)
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crypto: arm64/aes-ce-cipher - use AES library as fallback
Instead of calling into the table based scalar AES code in situations where the SIMD unit may not be used, use the generic AES code, which is more appropriate since it is less likely to be susceptible to timing attacks. 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/Kconfig2
-rw-r--r--arch/arm64/crypto/aes-ce-glue.c7
-rw-r--r--arch/arm64/crypto/aes-cipher-glue.c3
3 files changed, 3 insertions, 9 deletions
diff --git a/arch/arm64/crypto/Kconfig b/arch/arm64/crypto/Kconfig
index 66dea518221c..4922c4451e7c 100644
--- a/arch/arm64/crypto/Kconfig
+++ b/arch/arm64/crypto/Kconfig
@@ -73,7 +73,7 @@ config CRYPTO_AES_ARM64_CE
tristate "AES core cipher using ARMv8 Crypto Extensions"
depends on ARM64 && KERNEL_MODE_NEON
select CRYPTO_ALGAPI
- select CRYPTO_AES_ARM64
+ select CRYPTO_LIB_AES
config CRYPTO_AES_ARM64_CE_CCM
tristate "AES in CCM mode using ARMv8 Crypto Extensions"
diff --git a/arch/arm64/crypto/aes-ce-glue.c b/arch/arm64/crypto/aes-ce-glue.c
index d3bc97afde20..6d085dc56c51 100644
--- a/arch/arm64/crypto/aes-ce-glue.c
+++ b/arch/arm64/crypto/aes-ce-glue.c
@@ -20,9 +20,6 @@ MODULE_DESCRIPTION("Synchronous AES cipher using ARMv8 Crypto Extensions");
MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>");
MODULE_LICENSE("GPL v2");
-asmlinkage void __aes_arm64_encrypt(u32 *rk, u8 *out, const u8 *in, int rounds);
-asmlinkage void __aes_arm64_decrypt(u32 *rk, u8 *out, const u8 *in, int rounds);
-
struct aes_block {
u8 b[AES_BLOCK_SIZE];
};
@@ -51,7 +48,7 @@ static void aes_cipher_encrypt(struct crypto_tfm *tfm, u8 dst[], u8 const src[])
struct crypto_aes_ctx *ctx = crypto_tfm_ctx(tfm);
if (!crypto_simd_usable()) {
- __aes_arm64_encrypt(ctx->key_enc, dst, src, num_rounds(ctx));
+ aes_encrypt(ctx, dst, src);
return;
}
@@ -65,7 +62,7 @@ static void aes_cipher_decrypt(struct crypto_tfm *tfm, u8 dst[], u8 const src[])
struct crypto_aes_ctx *ctx = crypto_tfm_ctx(tfm);
if (!crypto_simd_usable()) {
- __aes_arm64_decrypt(ctx->key_dec, dst, src, num_rounds(ctx));
+ aes_decrypt(ctx, dst, src);
return;
}
diff --git a/arch/arm64/crypto/aes-cipher-glue.c b/arch/arm64/crypto/aes-cipher-glue.c
index cc7a6dad7c2e..8caf6dfefce8 100644
--- a/arch/arm64/crypto/aes-cipher-glue.c
+++ b/arch/arm64/crypto/aes-cipher-glue.c
@@ -10,10 +10,7 @@
#include <linux/module.h>
asmlinkage void __aes_arm64_encrypt(u32 *rk, u8 *out, const u8 *in, int rounds);
-EXPORT_SYMBOL(__aes_arm64_encrypt);
-
asmlinkage void __aes_arm64_decrypt(u32 *rk, u8 *out, const u8 *in, int rounds);
-EXPORT_SYMBOL(__aes_arm64_decrypt);
static void aes_arm64_encrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
{