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UPSTREAM: crypto: x86 - Regularize glue function prototypes

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The crypto glue performed function prototype casting via macros to make
indirect calls to assembly routines. Instead of performing casts at the
call sites (which trips Control Flow Integrity prototype checking), switch
each prototype to a common standard set of arguments which allows the
removal of the existing macros. In order to keep pointer math unchanged,
internal casting between u128 pointers and u8 pointers is added.

Co-developed-by: João Moreira <[email protected]>
Signed-off-by: João Moreira <[email protected]>
Signed-off-by: Kees Cook <[email protected]>
Reviewed-by: Eric Biggers <[email protected]>
Signed-off-by: Herbert Xu <[email protected]>
(cherry picked from commit 9c1e8836edbbaf3656bc07437b59c04be034ac4e)
Bug: 149095714
Change-Id: Ie67394193d09fb8982fc26dca87f63f6343bf38a
Signed-off-by: Sami Tolvanen <[email protected]>
This commit is contained in:
Kees Cook 2019-11-26 22:08:02 -08:00 • committed by Alistair Delva
commit 07dd89d119
22 changed files with 374 additions and 413 deletions
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18
crypto/cast6_generic.c
View file

@ -154,7 +154,7 @@ int cast6_setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int keylen)
EXPORT_SYMBOL_GPL(cast6_setkey);
/*forward quad round*/
static inline void Q(u32 *block, u8 *Kr, u32 *Km)
static inline void Q(u32 *block, const u8 *Kr, const u32 *Km)
{
u32 I;
block[2] ^= F1(block[3], Kr[0], Km[0]);
@ -164,7 +164,7 @@ static inline void Q(u32 *block, u8 *Kr, u32 *Km)
}
/*reverse quad round*/
static inline void QBAR(u32 *block, u8 *Kr, u32 *Km)
static inline void QBAR(u32 *block, const u8 *Kr, const u32 *Km)
{
u32 I;
block[3] ^= F1(block[0], Kr[3], Km[3]);
@ -173,13 +173,14 @@ static inline void QBAR(u32 *block, u8 *Kr, u32 *Km)
block[2] ^= F1(block[3], Kr[0], Km[0]);
}
void __cast6_encrypt(struct cast6_ctx *c, u8 *outbuf, const u8 *inbuf)
void __cast6_encrypt(const void *ctx, u8 *outbuf, const u8 *inbuf)
{
const struct cast6_ctx *c = ctx;
const __be32 *src = (const __be32 *)inbuf;
__be32 *dst = (__be32 *)outbuf;
u32 block[4];
u32 *Km;
u8 *Kr;
const u32 *Km;
const u8 *Kr;
block[0] = be32_to_cpu(src[0]);
block[1] = be32_to_cpu(src[1]);
@ -211,13 +212,14 @@ static void cast6_encrypt(struct crypto_tfm *tfm, u8 *outbuf, const u8 *inbuf)
__cast6_encrypt(crypto_tfm_ctx(tfm), outbuf, inbuf);
}
void __cast6_decrypt(struct cast6_ctx *c, u8 *outbuf, const u8 *inbuf)
void __cast6_decrypt(const void *ctx, u8 *outbuf, const u8 *inbuf)
{
const struct cast6_ctx *c = ctx;
const __be32 *src = (const __be32 *)inbuf;
__be32 *dst = (__be32 *)outbuf;
u32 block[4];
u32 *Km;
u8 *Kr;
const u32 *Km;
const u8 *Kr;
block[0] = be32_to_cpu(src[0]);
block[1] = be32_to_cpu(src[1]);

6
crypto/serpent_generic.c
View file

@ -449,8 +449,9 @@ int serpent_setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int keylen)
}
EXPORT_SYMBOL_GPL(serpent_setkey);
void __serpent_encrypt(struct serpent_ctx *ctx, u8 *dst, const u8 *src)
void __serpent_encrypt(const void *c, u8 *dst, const u8 *src)
{
const struct serpent_ctx *ctx = c;
const u32 *k = ctx->expkey;
const __le32 *s = (const __le32 *)src;
__le32 *d = (__le32 *)dst;
@ -514,8 +515,9 @@ static void serpent_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
__serpent_encrypt(ctx, dst, src);
}
void __serpent_decrypt(struct serpent_ctx *ctx, u8 *dst, const u8 *src)
void __serpent_decrypt(const void *c, u8 *dst, const u8 *src)
{
const struct serpent_ctx *ctx = c;
const u32 *k = ctx->expkey;
const __le32 *s = (const __le32 *)src;
__le32 *d = (__le32 *)dst;