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Date: Tue, 7 May 2019 09:13:19 -0700
From: Kees Cook <keescook@...omium.org>
To: Herbert Xu <herbert@...dor.apana.org.au>
Cc: Kees Cook <keescook@...omium.org>,
Joao Moreira <jmoreira@...e.de>,
Eric Biggers <ebiggers@...gle.com>,
Ingo Molnar <mingo@...hat.com>,
Thomas Gleixner <tglx@...utronix.de>,
Borislav Petkov <bp@...en8.de>,
x86@...nel.org,
linux-crypto@...r.kernel.org,
linux-kernel@...r.kernel.org,
kernel-hardening@...ts.openwall.com
Subject: [PATCH v3 5/7] crypto: x86/cast6: Use new glue function macros
From: Joao Moreira <jmoreira@...e.de>
Convert to function declaration macros from function prototype casts
to avoid trigger Control-Flow Integrity checks during indirect function
calls.
Signed-off-by: Joao Moreira <jmoreira@...e.de>
Co-developed-by: Kees Cook <keescook@...omium.org>
Signed-off-by: Kees Cook <keescook@...omium.org>
---
arch/x86/crypto/cast6_avx_glue.c | 65 +++++++++++++++-----------------
1 file changed, 31 insertions(+), 34 deletions(-)
diff --git a/arch/x86/crypto/cast6_avx_glue.c b/arch/x86/crypto/cast6_avx_glue.c
index 18965c39305e..4735cd0ef379 100644
--- a/arch/x86/crypto/cast6_avx_glue.c
+++ b/arch/x86/crypto/cast6_avx_glue.c
@@ -35,20 +35,20 @@
#define CAST6_PARALLEL_BLOCKS 8
-asmlinkage void cast6_ecb_enc_8way(struct cast6_ctx *ctx, u8 *dst,
- const u8 *src);
-asmlinkage void cast6_ecb_dec_8way(struct cast6_ctx *ctx, u8 *dst,
- const u8 *src);
-
-asmlinkage void cast6_cbc_dec_8way(struct cast6_ctx *ctx, u8 *dst,
- const u8 *src);
-asmlinkage void cast6_ctr_8way(struct cast6_ctx *ctx, u8 *dst, const u8 *src,
- le128 *iv);
-
-asmlinkage void cast6_xts_enc_8way(struct cast6_ctx *ctx, u8 *dst,
- const u8 *src, le128 *iv);
-asmlinkage void cast6_xts_dec_8way(struct cast6_ctx *ctx, u8 *dst,
- const u8 *src, le128 *iv);
+#define CAST6_GLUE(func) GLUE_CAST(func, cast6_ctx)
+#define CAST6_GLUE_CBC(func) GLUE_CAST_CBC(func, cast6_ctx)
+#define CAST6_GLUE_CTR(func) GLUE_CAST_CTR(func, cast6_ctx)
+#define CAST6_GLUE_XTS(func) GLUE_CAST_XTS(func, cast6_ctx)
+
+CAST6_GLUE(__cast6_encrypt);
+CAST6_GLUE(__cast6_decrypt);
+CAST6_GLUE(cast6_ecb_enc_8way);
+CAST6_GLUE(cast6_ecb_dec_8way);
+CAST6_GLUE_CBC(cast6_cbc_dec_8way);
+CAST6_GLUE_CBC(__cast6_decrypt);
+CAST6_GLUE_CTR(cast6_ctr_8way);
+CAST6_GLUE_XTS(cast6_xts_enc_8way);
+CAST6_GLUE_XTS(cast6_xts_dec_8way);
static int cast6_setkey_skcipher(struct crypto_skcipher *tfm,
const u8 *key, unsigned int keylen)
@@ -58,14 +58,12 @@ static int cast6_setkey_skcipher(struct crypto_skcipher *tfm,
static void cast6_xts_enc(void *ctx, u128 *dst, const u128 *src, le128 *iv)
{
- glue_xts_crypt_128bit_one(ctx, dst, src, iv,
- GLUE_FUNC_CAST(__cast6_encrypt));
+ glue_xts_crypt_128bit_one(ctx, dst, src, iv, __cast6_encrypt_glue);
}
static void cast6_xts_dec(void *ctx, u128 *dst, const u128 *src, le128 *iv)
{
- glue_xts_crypt_128bit_one(ctx, dst, src, iv,
- GLUE_FUNC_CAST(__cast6_decrypt));
+ glue_xts_crypt_128bit_one(ctx, dst, src, iv, __cast6_decrypt_glue);
}
static void cast6_crypt_ctr(void *ctx, u128 *dst, const u128 *src, le128 *iv)
@@ -85,10 +83,10 @@ static const struct common_glue_ctx cast6_enc = {
.funcs = { {
.num_blocks = CAST6_PARALLEL_BLOCKS,
- .fn_u = { .ecb = GLUE_FUNC_CAST(cast6_ecb_enc_8way) }
+ .fn_u = { .ecb = cast6_ecb_enc_8way_glue }
}, {
.num_blocks = 1,
- .fn_u = { .ecb = GLUE_FUNC_CAST(__cast6_encrypt) }
+ .fn_u = { .ecb = __cast6_encrypt_glue }
} }
};
@@ -98,10 +96,10 @@ static const struct common_glue_ctx cast6_ctr = {
.funcs = { {
.num_blocks = CAST6_PARALLEL_BLOCKS,
- .fn_u = { .ctr = GLUE_CTR_FUNC_CAST(cast6_ctr_8way) }
+ .fn_u = { .ctr = cast6_ctr_8way_glue }
}, {
.num_blocks = 1,
- .fn_u = { .ctr = GLUE_CTR_FUNC_CAST(cast6_crypt_ctr) }
+ .fn_u = { .ctr = cast6_crypt_ctr }
} }
};
@@ -111,10 +109,10 @@ static const struct common_glue_ctx cast6_enc_xts = {
.funcs = { {
.num_blocks = CAST6_PARALLEL_BLOCKS,
- .fn_u = { .xts = GLUE_XTS_FUNC_CAST(cast6_xts_enc_8way) }
+ .fn_u = { .xts = cast6_xts_enc_8way_glue }
}, {
.num_blocks = 1,
- .fn_u = { .xts = GLUE_XTS_FUNC_CAST(cast6_xts_enc) }
+ .fn_u = { .xts = cast6_xts_enc }
} }
};
@@ -124,10 +122,10 @@ static const struct common_glue_ctx cast6_dec = {
.funcs = { {
.num_blocks = CAST6_PARALLEL_BLOCKS,
- .fn_u = { .ecb = GLUE_FUNC_CAST(cast6_ecb_dec_8way) }
+ .fn_u = { .ecb = cast6_ecb_dec_8way_glue }
}, {
.num_blocks = 1,
- .fn_u = { .ecb = GLUE_FUNC_CAST(__cast6_decrypt) }
+ .fn_u = { .ecb = __cast6_decrypt_glue }
} }
};
@@ -137,10 +135,10 @@ static const struct common_glue_ctx cast6_dec_cbc = {
.funcs = { {
.num_blocks = CAST6_PARALLEL_BLOCKS,
- .fn_u = { .cbc = GLUE_CBC_FUNC_CAST(cast6_cbc_dec_8way) }
+ .fn_u = { .cbc = cast6_cbc_dec_8way_cbc_glue }
}, {
.num_blocks = 1,
- .fn_u = { .cbc = GLUE_CBC_FUNC_CAST(__cast6_decrypt) }
+ .fn_u = { .cbc = __cast6_decrypt_cbc_glue }
} }
};
@@ -150,10 +148,10 @@ static const struct common_glue_ctx cast6_dec_xts = {
.funcs = { {
.num_blocks = CAST6_PARALLEL_BLOCKS,
- .fn_u = { .xts = GLUE_XTS_FUNC_CAST(cast6_xts_dec_8way) }
+ .fn_u = { .xts = cast6_xts_dec_8way_glue }
}, {
.num_blocks = 1,
- .fn_u = { .xts = GLUE_XTS_FUNC_CAST(cast6_xts_dec) }
+ .fn_u = { .xts = cast6_xts_dec }
} }
};
@@ -169,8 +167,7 @@ static int ecb_decrypt(struct skcipher_request *req)
static int cbc_encrypt(struct skcipher_request *req)
{
- return glue_cbc_encrypt_req_128bit(GLUE_FUNC_CAST(__cast6_encrypt),
- req);
+ return glue_cbc_encrypt_req_128bit(__cast6_encrypt_glue, req);
}
static int cbc_decrypt(struct skcipher_request *req)
@@ -215,7 +212,7 @@ static int xts_encrypt(struct skcipher_request *req)
struct cast6_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
return glue_xts_req_128bit(&cast6_enc_xts, req,
- XTS_TWEAK_CAST(__cast6_encrypt),
+ __cast6_encrypt_glue,
&ctx->tweak_ctx, &ctx->crypt_ctx);
}
@@ -225,7 +222,7 @@ static int xts_decrypt(struct skcipher_request *req)
struct cast6_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
return glue_xts_req_128bit(&cast6_dec_xts, req,
- XTS_TWEAK_CAST(__cast6_encrypt),
+ __cast6_encrypt_glue,
&ctx->tweak_ctx, &ctx->crypt_ctx);
}
--
2.17.1
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