eden-emu/mbedtls
15
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Improve macro hygiene

Browse source 
This commit improves hygiene and formatting of macro definitions
throughout the library. Specifically:
- It adds brackets around parameters to avoid unintended
  interpretation of arguments, e.g. due to operator precedence.
- It adds uses of the `do { ... } while( 0 )` idiom for macros that
  can be used as commands.
This commit is contained in:
Hanno Becker 2018-10-15 12:01:35 +01:00 • committed by Gilles Peskine
parent 20d707dd3e
commit d6028a1894
23 changed files with 325 additions and 252 deletions
library
sha512.c

21
library/sha512.c
View file

@ -224,8 +224,8 @@ int mbedtls_internal_sha512_process( mbedtls_sha512_context *ctx,
SHA512_VALIDATE_RET( ctx != NULL );
SHA512_VALIDATE_RET( (const unsigned char *)data != NULL );
#define SHR(x,n) (x >> n)
#define ROTR(x,n) (SHR(x,n) | (x << (64 - n)))
#define SHR(x,n) ((x) >> (n))
#define ROTR(x,n) (SHR(x,n) | ((x) << (64 - (n))))
#define S0(x) (ROTR(x, 1) ^ ROTR(x, 8) ^ SHR(x, 7))
#define S1(x) (ROTR(x,19) ^ ROTR(x,61) ^ SHR(x, 6))
@ -233,15 +233,16 @@ int mbedtls_internal_sha512_process( mbedtls_sha512_context *ctx,
#define S2(x) (ROTR(x,28) ^ ROTR(x,34) ^ ROTR(x,39))
#define S3(x) (ROTR(x,14) ^ ROTR(x,18) ^ ROTR(x,41))
#define F0(x,y,z) ((x & y) | (z & (x | y)))
#define F1(x,y,z) (z ^ (x & (y ^ z)))
#define F0(x,y,z) (((x) & (y)) | ((z) & ((x) | (y))))
#define F1(x,y,z) ((z) ^ ((x) & ((y) ^ (z))))
#define P(a,b,c,d,e,f,g,h,x,K) \
{ \
temp1 = h + S3(e) + F1(e,f,g) + K + x; \
temp2 = S2(a) + F0(a,b,c); \
d += temp1; h = temp1 + temp2; \
}
#define P(a,b,c,d,e,f,g,h,x,K) \
do \
{ \
temp1 = (h) + S3(e) + F1(e,f,g) + (K) + (x); \
temp2 = S2(a) + F0(a,b,c); \
(d) += temp1; (h) = temp1 + temp2; \
} while( 0 )
for( i = 0; i < 16; i++ )
{