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aria: internal names closer to standard document

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Manuel Pégourié-Gonnard 2018-02-26 11:59:16 +01:00
parent 64744f88b6
commit 35ad891aee
1 changed files with 29 additions and 21 deletions
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50
library/aria.c
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@ -77,11 +77,19 @@ static void mbedtls_zeroize( void *v, size_t n ) {
}
#endif
/* modify byte order: ( A B C D ) -> ( C D A B ), i.e. rotate by 16 bits */
#define ARIA_FLIP1(x) (((x) >> 16) ^ ((x) << 16))
/*
* modify byte order ( A B C D ) -> ( B A D C ), i.e. swap pairs of bytes
*
* This is submatrix P1 in [1] Appendix B.1
*/
#define ARIA_P1(x) ((((x) >> 8) & 0x00FF00FF) ^ (((x) & 0x00FF00FF) << 8))
/* modify byte order ( A B C D ) -> ( B A D C ), i.e. swap pairs of bytes */
#define ARIA_FLIP2(x) ((((x) >> 8) & 0x00FF00FF) ^ (((x) & 0x00FF00FF) << 8))
/*
* modify byte order: ( A B C D ) -> ( C D A B ), i.e. rotate by 16 bits
*
* This is submatrix P2 in [1] Appendix B.1
*/
#define ARIA_P2(x) (((x) >> 16) ^ ((x) << 16))
/*
* ARIA Affine Transform
@ -93,22 +101,22 @@ static inline void aria_a( uint32_t *a, uint32_t *b,
uint32_t ta, tb, tc;
ta = *b;
*b = *a;
*a = ARIA_FLIP1( ta );
tb = ARIA_FLIP1( *d );
*d = ARIA_FLIP2( *c );
*c = ARIA_FLIP2( tb );
*a = ARIA_P2( ta );
tb = ARIA_P2( *d );
*d = ARIA_P1( *c );
*c = ARIA_P1( tb );
ta ^= *d;
tc = ARIA_FLIP1( *b );
ta = ARIA_FLIP2( ta ) ^ tc ^ *c;
tb ^= ARIA_FLIP1( *d );
tc ^= ARIA_FLIP2( *a );
tc = ARIA_P2( *b );
ta = ARIA_P1( ta ) ^ tc ^ *c;
tb ^= ARIA_P2( *d );
tc ^= ARIA_P1( *a );
*b ^= ta ^ tb;
tb = ARIA_FLIP1( tb ) ^ ta;
*a ^= ARIA_FLIP2( tb );
ta = ARIA_FLIP1( ta );
*d ^= ARIA_FLIP2( ta ) ^ tc;
tc = ARIA_FLIP1( tc );
*c ^= ARIA_FLIP2( tc ) ^ ta;
tb = ARIA_P2( tb ) ^ ta;
*a ^= ARIA_P1( tb );
ta = ARIA_P2( ta );
*d ^= ARIA_P1( ta ) ^ tc;
tc = ARIA_P2( tc );
*c ^= ARIA_P1( tc ) ^ ta;
}
/*
@ -309,14 +317,14 @@ static void aria_rot128(uint32_t r[4], const uint32_t a[4],
const uint8_t n2 = n1 ? 32 - n1 : 0; // reverse bit offset
j = (n / 32) % 4; // initial word offset
t = ARIA_FLIP1( ARIA_FLIP2( b[j] ) ); // big endian
t = ARIA_P2( ARIA_P1( b[j] ) ); // big endian
for( i = 0; i < 4; i++ )
{
j = (j + 1) % 4; // get next word, big endian
u = ARIA_FLIP1( ARIA_FLIP2( b[j] ) );
u = ARIA_P2( ARIA_P1( b[j] ) );
t <<= n1; // rotate
t |= u >> n2;
t = ARIA_FLIP1( ARIA_FLIP2( t ) ); // back to little endian
t = ARIA_P2( ARIA_P1( t ) ); // back to little endian
r[i] = a[i] ^ t; // store
t = u; // move to next word
}