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Move BYTES_TO_U32_LE to common.h

Browse source 
The macro BYTES_TO_U32_LE appears in poly1305.c and
chacha20.c.
Removes duplicate code and save vertical
space the macro has been moved to common.h.
Improves maintainability.

Signed-off-by: Joe Subbiani <joe.subbiani@arm.com>
This commit is contained in:
Joe Subbiani 2021-06-23 11:23:44 +01:00
parent ba486b0084
commit 927488e2d5
3 changed files with 12 additions and 16 deletions
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7
library/chacha20.c
View file

@ -54,13 +54,6 @@
#define CHACHA20_VALIDATE( cond ) \
MBEDTLS_INTERNAL_VALIDATE( cond )
#define BYTES_TO_U32_LE( data, offset ) \
( (uint32_t) (data)[offset] \
| (uint32_t) ( (uint32_t) (data)[( offset ) + 1] << 8 ) \
| (uint32_t) ( (uint32_t) (data)[( offset ) + 2] << 16 ) \
| (uint32_t) ( (uint32_t) (data)[( offset ) + 3] << 24 ) \
)
#define ROTL32( value, amount ) \
( (uint32_t) ( (value) << (amount) ) | ( (value) >> ( 32 - (amount) ) ) )

14
library/common.h
View file

@ -62,9 +62,19 @@
* To tidy up code and save horizontal and vertical space, use byte
* reading macros to cast
*/
#define BYTE_0( x ) ( (uint8_t) ( ( x ) & 0xff ) )
#define BYTE_1( x ) ( (uint8_t) ( ( ( x ) >> 8 ) & 0xff ) )
#define BYTE_0( x ) ( (uint8_t) ( ( x ) & 0xff ) )
#define BYTE_1( x ) ( (uint8_t) ( ( ( x ) >> 8 ) & 0xff ) )
#define BYTE_2( x ) ( (uint8_t) ( ( ( x ) >> 16 ) & 0xff ) )
#define BYTE_3( x ) ( (uint8_t) ( ( ( x ) >> 24 ) & 0xff ) )
/**
*
*/
#define BYTES_TO_U32_LE( data, offset ) \
( (uint32_t) (data)[offset] \
| (uint32_t) ( (uint32_t) (data)[( offset ) + 1] << 8 ) \
| (uint32_t) ( (uint32_t) (data)[( offset ) + 2] << 16 ) \
| (uint32_t) ( (uint32_t) (data)[( offset ) + 3] << 24 ) \
)
#endif /* MBEDTLS_LIBRARY_COMMON_H */

7
library/poly1305.c
View file

@ -52,13 +52,6 @@
#define POLY1305_BLOCK_SIZE_BYTES ( 16U )
#define BYTES_TO_U32_LE( data, offset ) \
( (uint32_t) (data)[offset] \
| (uint32_t) ( (uint32_t) (data)[( offset ) + 1] << 8 ) \
| (uint32_t) ( (uint32_t) (data)[( offset ) + 2] << 16 ) \
| (uint32_t) ( (uint32_t) (data)[( offset ) + 3] << 24 ) \
)
/*
* Our implementation is tuned for 32-bit platforms with a 64-bit multiplier.
* However we provided an alternative for platforms without such a multiplier.