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Message-Id: <20190507161321.34611-5-keescook@chromium.org>
Date: Tue, 7 May 2019 09:13:18 -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 4/7] crypto: x86/twofish: 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/twofish_avx_glue.c | 71 ++++++++++-----------------
arch/x86/crypto/twofish_glue_3way.c | 28 +++++------
arch/x86/include/asm/crypto/twofish.h | 22 +++++----
3 files changed, 50 insertions(+), 71 deletions(-)
diff --git a/arch/x86/crypto/twofish_avx_glue.c b/arch/x86/crypto/twofish_avx_glue.c
index 66d989230d10..68dc52291c5d 100644
--- a/arch/x86/crypto/twofish_avx_glue.c
+++ b/arch/x86/crypto/twofish_avx_glue.c
@@ -37,20 +37,12 @@
#define TWOFISH_PARALLEL_BLOCKS 8
/* 8-way parallel cipher functions */
-asmlinkage void twofish_ecb_enc_8way(struct twofish_ctx *ctx, u8 *dst,
- const u8 *src);
-asmlinkage void twofish_ecb_dec_8way(struct twofish_ctx *ctx, u8 *dst,
- const u8 *src);
-
-asmlinkage void twofish_cbc_dec_8way(struct twofish_ctx *ctx, u8 *dst,
- const u8 *src);
-asmlinkage void twofish_ctr_8way(struct twofish_ctx *ctx, u8 *dst,
- const u8 *src, le128 *iv);
-
-asmlinkage void twofish_xts_enc_8way(struct twofish_ctx *ctx, u8 *dst,
- const u8 *src, le128 *iv);
-asmlinkage void twofish_xts_dec_8way(struct twofish_ctx *ctx, u8 *dst,
- const u8 *src, le128 *iv);
+TWOFISH_GLUE(twofish_ecb_enc_8way);
+TWOFISH_GLUE(twofish_ecb_dec_8way);
+TWOFISH_GLUE_CBC(twofish_cbc_dec_8way);
+TWOFISH_GLUE_CTR(twofish_ctr_8way);
+TWOFISH_GLUE_XTS(twofish_xts_enc_8way);
+TWOFISH_GLUE_XTS(twofish_xts_dec_8way);
static int twofish_setkey_skcipher(struct crypto_skcipher *tfm,
const u8 *key, unsigned int keylen)
@@ -58,22 +50,14 @@ static int twofish_setkey_skcipher(struct crypto_skcipher *tfm,
return twofish_setkey(&tfm->base, key, keylen);
}
-static inline void twofish_enc_blk_3way(struct twofish_ctx *ctx, u8 *dst,
- const u8 *src)
-{
- __twofish_enc_blk_3way(ctx, dst, src, false);
-}
-
static void twofish_xts_enc(void *ctx, u128 *dst, const u128 *src, le128 *iv)
{
- glue_xts_crypt_128bit_one(ctx, dst, src, iv,
- GLUE_FUNC_CAST(twofish_enc_blk));
+ glue_xts_crypt_128bit_one(ctx, dst, src, iv, twofish_enc_blk_glue);
}
static void twofish_xts_dec(void *ctx, u128 *dst, const u128 *src, le128 *iv)
{
- glue_xts_crypt_128bit_one(ctx, dst, src, iv,
- GLUE_FUNC_CAST(twofish_dec_blk));
+ glue_xts_crypt_128bit_one(ctx, dst, src, iv, twofish_dec_blk_glue);
}
struct twofish_xts_ctx {
@@ -108,13 +92,13 @@ static const struct common_glue_ctx twofish_enc = {
.funcs = { {
.num_blocks = TWOFISH_PARALLEL_BLOCKS,
- .fn_u = { .ecb = GLUE_FUNC_CAST(twofish_ecb_enc_8way) }
+ .fn_u = { .ecb = twofish_ecb_enc_8way_glue }
}, {
.num_blocks = 3,
- .fn_u = { .ecb = GLUE_FUNC_CAST(twofish_enc_blk_3way) }
+ .fn_u = { .ecb = twofish_enc_blk_3way }
}, {
.num_blocks = 1,
- .fn_u = { .ecb = GLUE_FUNC_CAST(twofish_enc_blk) }
+ .fn_u = { .ecb = twofish_enc_blk_glue }
} }
};
@@ -124,13 +108,13 @@ static const struct common_glue_ctx twofish_ctr = {
.funcs = { {
.num_blocks = TWOFISH_PARALLEL_BLOCKS,
- .fn_u = { .ctr = GLUE_CTR_FUNC_CAST(twofish_ctr_8way) }
+ .fn_u = { .ctr = twofish_ctr_8way_glue }
}, {
.num_blocks = 3,
- .fn_u = { .ctr = GLUE_CTR_FUNC_CAST(twofish_enc_blk_ctr_3way) }
+ .fn_u = { .ctr = twofish_enc_blk_ctr_3way }
}, {
.num_blocks = 1,
- .fn_u = { .ctr = GLUE_CTR_FUNC_CAST(twofish_enc_blk_ctr) }
+ .fn_u = { .ctr = twofish_enc_blk_ctr_glue }
} }
};
@@ -140,10 +124,10 @@ static const struct common_glue_ctx twofish_enc_xts = {
.funcs = { {
.num_blocks = TWOFISH_PARALLEL_BLOCKS,
- .fn_u = { .xts = GLUE_XTS_FUNC_CAST(twofish_xts_enc_8way) }
+ .fn_u = { .xts = twofish_xts_enc_8way_glue }
}, {
.num_blocks = 1,
- .fn_u = { .xts = GLUE_XTS_FUNC_CAST(twofish_xts_enc) }
+ .fn_u = { .xts = twofish_xts_enc }
} }
};
@@ -153,13 +137,13 @@ static const struct common_glue_ctx twofish_dec = {
.funcs = { {
.num_blocks = TWOFISH_PARALLEL_BLOCKS,
- .fn_u = { .ecb = GLUE_FUNC_CAST(twofish_ecb_dec_8way) }
+ .fn_u = { .ecb = twofish_ecb_dec_8way_glue }
}, {
.num_blocks = 3,
- .fn_u = { .ecb = GLUE_FUNC_CAST(twofish_dec_blk_3way) }
+ .fn_u = { .ecb = twofish_dec_blk_3way_glue }
}, {
.num_blocks = 1,
- .fn_u = { .ecb = GLUE_FUNC_CAST(twofish_dec_blk) }
+ .fn_u = { .ecb = twofish_dec_blk_glue }
} }
};
@@ -169,13 +153,13 @@ static const struct common_glue_ctx twofish_dec_cbc = {
.funcs = { {
.num_blocks = TWOFISH_PARALLEL_BLOCKS,
- .fn_u = { .cbc = GLUE_CBC_FUNC_CAST(twofish_cbc_dec_8way) }
+ .fn_u = { .cbc = twofish_cbc_dec_8way_cbc_glue }
}, {
.num_blocks = 3,
- .fn_u = { .cbc = GLUE_CBC_FUNC_CAST(twofish_dec_blk_cbc_3way) }
+ .fn_u = { .cbc = twofish_dec_blk_cbc_3way }
}, {
.num_blocks = 1,
- .fn_u = { .cbc = GLUE_CBC_FUNC_CAST(twofish_dec_blk) }
+ .fn_u = { .cbc = twofish_dec_blk_cbc_glue }
} }
};
@@ -185,10 +169,10 @@ static const struct common_glue_ctx twofish_dec_xts = {
.funcs = { {
.num_blocks = TWOFISH_PARALLEL_BLOCKS,
- .fn_u = { .xts = GLUE_XTS_FUNC_CAST(twofish_xts_dec_8way) }
+ .fn_u = { .xts = twofish_xts_dec_8way_glue }
}, {
.num_blocks = 1,
- .fn_u = { .xts = GLUE_XTS_FUNC_CAST(twofish_xts_dec) }
+ .fn_u = { .xts = twofish_xts_dec }
} }
};
@@ -204,8 +188,7 @@ 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(twofish_enc_blk),
- req);
+ return glue_cbc_encrypt_req_128bit(twofish_enc_blk_glue, req);
}
static int cbc_decrypt(struct skcipher_request *req)
@@ -224,7 +207,7 @@ static int xts_encrypt(struct skcipher_request *req)
struct twofish_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
return glue_xts_req_128bit(&twofish_enc_xts, req,
- XTS_TWEAK_CAST(twofish_enc_blk),
+ twofish_enc_blk_glue,
&ctx->tweak_ctx, &ctx->crypt_ctx);
}
@@ -234,7 +217,7 @@ static int xts_decrypt(struct skcipher_request *req)
struct twofish_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
return glue_xts_req_128bit(&twofish_dec_xts, req,
- XTS_TWEAK_CAST(twofish_enc_blk),
+ twofish_enc_blk_glue,
&ctx->tweak_ctx, &ctx->crypt_ctx);
}
diff --git a/arch/x86/crypto/twofish_glue_3way.c b/arch/x86/crypto/twofish_glue_3way.c
index 571485502ec8..e58236435735 100644
--- a/arch/x86/crypto/twofish_glue_3way.c
+++ b/arch/x86/crypto/twofish_glue_3way.c
@@ -40,12 +40,6 @@ static int twofish_setkey_skcipher(struct crypto_skcipher *tfm,
return twofish_setkey(&tfm->base, key, keylen);
}
-static inline void twofish_enc_blk_3way(struct twofish_ctx *ctx, u8 *dst,
- const u8 *src)
-{
- __twofish_enc_blk_3way(ctx, dst, src, false);
-}
-
static inline void twofish_enc_blk_xor_3way(struct twofish_ctx *ctx, u8 *dst,
const u8 *src)
{
@@ -66,7 +60,8 @@ void twofish_dec_blk_cbc_3way(void *ctx, u128 *dst, const u128 *src)
}
EXPORT_SYMBOL_GPL(twofish_dec_blk_cbc_3way);
-void twofish_enc_blk_ctr(void *ctx, u128 *dst, const u128 *src, le128 *iv)
+void twofish_enc_blk_ctr(struct twofish_ctx *ctx, u128 *dst, const u128 *src,
+ le128 *iv)
{
be128 ctrblk;
@@ -109,10 +104,10 @@ static const struct common_glue_ctx twofish_enc = {
.funcs = { {
.num_blocks = 3,
- .fn_u = { .ecb = GLUE_FUNC_CAST(twofish_enc_blk_3way) }
+ .fn_u = { .ecb = twofish_enc_blk_3way }
}, {
.num_blocks = 1,
- .fn_u = { .ecb = GLUE_FUNC_CAST(twofish_enc_blk) }
+ .fn_u = { .ecb = twofish_enc_blk_glue }
} }
};
@@ -122,10 +117,10 @@ static const struct common_glue_ctx twofish_ctr = {
.funcs = { {
.num_blocks = 3,
- .fn_u = { .ecb = GLUE_FUNC_CAST(twofish_enc_blk_ctr_3way) }
+ .fn_u = { .ctr = twofish_enc_blk_ctr_3way }
}, {
.num_blocks = 1,
- .fn_u = { .ecb = GLUE_FUNC_CAST(twofish_enc_blk_ctr) }
+ .fn_u = { .ctr = twofish_enc_blk_ctr_glue }
} }
};
@@ -135,10 +130,10 @@ static const struct common_glue_ctx twofish_dec = {
.funcs = { {
.num_blocks = 3,
- .fn_u = { .ecb = GLUE_FUNC_CAST(twofish_dec_blk_3way) }
+ .fn_u = { .ecb = twofish_dec_blk_3way_glue }
}, {
.num_blocks = 1,
- .fn_u = { .ecb = GLUE_FUNC_CAST(twofish_dec_blk) }
+ .fn_u = { .ecb = twofish_dec_blk_glue }
} }
};
@@ -148,10 +143,10 @@ static const struct common_glue_ctx twofish_dec_cbc = {
.funcs = { {
.num_blocks = 3,
- .fn_u = { .cbc = GLUE_CBC_FUNC_CAST(twofish_dec_blk_cbc_3way) }
+ .fn_u = { .cbc = twofish_dec_blk_cbc_3way }
}, {
.num_blocks = 1,
- .fn_u = { .cbc = GLUE_CBC_FUNC_CAST(twofish_dec_blk) }
+ .fn_u = { .cbc = twofish_dec_blk_cbc_glue }
} }
};
@@ -167,8 +162,7 @@ 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(twofish_enc_blk),
- req);
+ return glue_cbc_encrypt_req_128bit(twofish_enc_blk_glue, req);
}
static int cbc_decrypt(struct skcipher_request *req)
diff --git a/arch/x86/include/asm/crypto/twofish.h b/arch/x86/include/asm/crypto/twofish.h
index f618bf272b90..59f3228fbc5d 100644
--- a/arch/x86/include/asm/crypto/twofish.h
+++ b/arch/x86/include/asm/crypto/twofish.h
@@ -6,22 +6,24 @@
#include <crypto/twofish.h>
#include <crypto/b128ops.h>
+#define TWOFISH_GLUE(func) GLUE_CAST(func, twofish_ctx)
+#define TWOFISH_GLUE_XOR(func) GLUE_CAST_XOR(func, twofish_ctx)
+#define TWOFISH_GLUE_CBC(func) GLUE_CAST_CBC(func, twofish_ctx)
+#define TWOFISH_GLUE_CTR(func) GLUE_CAST_CTR(func, twofish_ctx)
+#define TWOFISH_GLUE_XTS(func) GLUE_CAST_XTS(func, twofish_ctx)
+
/* regular block cipher functions from twofish_x86_64 module */
-asmlinkage void twofish_enc_blk(struct twofish_ctx *ctx, u8 *dst,
- const u8 *src);
-asmlinkage void twofish_dec_blk(struct twofish_ctx *ctx, u8 *dst,
- const u8 *src);
+TWOFISH_GLUE(twofish_enc_blk);
+TWOFISH_GLUE(twofish_dec_blk);
+TWOFISH_GLUE_CBC(twofish_dec_blk);
/* 3-way parallel cipher functions */
-asmlinkage void __twofish_enc_blk_3way(struct twofish_ctx *ctx, u8 *dst,
- const u8 *src, bool xor);
-asmlinkage void twofish_dec_blk_3way(struct twofish_ctx *ctx, u8 *dst,
- const u8 *src);
+TWOFISH_GLUE_XOR(twofish_enc_blk_3way);
+TWOFISH_GLUE(twofish_dec_blk_3way);
/* helpers from twofish_x86_64-3way module */
extern void twofish_dec_blk_cbc_3way(void *ctx, u128 *dst, const u128 *src);
-extern void twofish_enc_blk_ctr(void *ctx, u128 *dst, const u128 *src,
- le128 *iv);
+TWOFISH_GLUE_CTR(twofish_enc_blk_ctr);
extern void twofish_enc_blk_ctr_3way(void *ctx, u128 *dst, const u128 *src,
le128 *iv);
--
2.17.1
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