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Message-Id: <20190506191950.9521-5-jmoreira@suse.de>
Date: Mon, 6 May 2019 16:19:50 -0300
From: Joao Moreira <jmoreira@...e.de>
To: kernel-hardening@...ts.openwall.com
Cc: linux-kernel@...r.kernel.org, x86@...nel.org,
herbert@...dor.apana.org.au, davem@...emloft.net,
tglx@...utronix.de, mingo@...hat.com, hpa@...or.com,
gregkh@...uxfoundation.org, keescook@...omium.org
Subject: [RFC PATCH v2 4/4] Fix cast6 crypto functions prototype casts
Add macros that generate glue functions for cast6 crypto functions.
Remove GLUE_FUNC_CAST macros from function pointer assignement and use
the helper instead, making the prototypes compliant.
Signed-off-by: Joao Moreira <jmoreira@...e.de>
---
arch/x86/crypto/cast6_avx_glue.c | 54 ++++++++++++++++------------------------
include/crypto/cast6.h | 23 +++++++++++++++--
2 files changed, 43 insertions(+), 34 deletions(-)
diff --git a/arch/x86/crypto/cast6_avx_glue.c b/arch/x86/crypto/cast6_avx_glue.c
index 18965c39305e..7f156fc02422 100644
--- a/arch/x86/crypto/cast6_avx_glue.c
+++ b/arch/x86/crypto/cast6_avx_glue.c
@@ -35,20 +35,13 @@
#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);
+CAST6_GLUE(cast6_ecb_enc_8way);
+CAST6_GLUE(cast6_ecb_dec_8way);
+CAST6_GLUE_CTR(cast6_ctr_8way);
+CAST6_GLUE_XTS(cast6_xts_enc_8way);
+CAST6_GLUE_XTS(cast6_xts_dec_8way);
+CAST6_GLUE_CBC(cast6_cbc_dec_8way, cast6_cbc_dec_8way_glue);
+CAST6_GLUE_CBC(__cast6_decrypt, __cast6_decrypt_cbc_glue);
static int cast6_setkey_skcipher(struct crypto_skcipher *tfm,
const u8 *key, unsigned int keylen)
@@ -58,14 +51,12 @@ 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 +76,10 @@ 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 +89,10 @@ 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 +102,10 @@ 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 +115,10 @@ 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 +128,10 @@ 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_glue }
}, {
.num_blocks = 1,
- .fn_u = { .cbc = GLUE_CBC_FUNC_CAST(__cast6_decrypt) }
+ .fn_u = { .cbc = __cast6_decrypt_cbc_glue }
} }
};
@@ -150,10 +141,10 @@ 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 +160,7 @@ 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)
diff --git a/include/crypto/cast6.h b/include/crypto/cast6.h
index c71f6ef47f0f..0b4970a769c4 100644
--- a/include/crypto/cast6.h
+++ b/include/crypto/cast6.h
@@ -10,6 +10,25 @@
#define CAST6_MIN_KEY_SIZE 16
#define CAST6_MAX_KEY_SIZE 32
+#define CAST6_GLUE(func) \
+asmlinkage void func(struct cast6_ctx *ctx, u8 *dst, const u8 *src); \
+asmlinkage static inline void func ## _glue(void *ctx, u8 *dst, const u8 *src) \
+{ func((struct cast6_ctx *) ctx, dst, src); }
+
+#define CAST6_GLUE_CBC(func, helper) \
+asmlinkage void func(struct cast6_ctx *ctx, u8 *dst, const u8 *src); \
+asmlinkage static inline void helper(void *ctx, u128 *dst, const u128 *src) \
+{ func((struct cast6_ctx *) ctx, (u8 *) dst, (u8 *) src); }
+
+#define CAST6_GLUE_CTR(func) \
+asmlinkage void func(struct cast6_ctx *ctx, u8 *dst, const u8 *src, le128 *iv);\
+asmlinkage static inline void func ## _glue(void *ctx, u128 *dst, \
+ const u128 *src, le128 *iv) \
+{ func((struct cast6_ctx *) ctx, (u8 *) dst, (u8 *) src, iv); }
+
+#define CAST6_GLUE_XTS(func) CAST6_GLUE_CTR(func)
+
+
struct cast6_ctx {
u32 Km[12][4];
u8 Kr[12][4];
@@ -19,7 +38,7 @@ int __cast6_setkey(struct cast6_ctx *ctx, const u8 *key,
unsigned int keylen, u32 *flags);
int cast6_setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int keylen);
-void __cast6_encrypt(struct cast6_ctx *ctx, u8 *dst, const u8 *src);
-void __cast6_decrypt(struct cast6_ctx *ctx, u8 *dst, const u8 *src);
+CAST6_GLUE(__cast6_encrypt);
+CAST6_GLUE(__cast6_decrypt);
#endif
--
2.16.4
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