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Merge remote-tracking branch 'upstream-restricted/pr/421' into development-proposed

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This commit is contained in:
Jaeden Amero
2018-05-04 14:39:24 +01:00
parent fb19399f41 8491406803
commit a331e0f0af
59 changed files with 767 additions and 395 deletions
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19
library/bignum.c
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@ -45,6 +45,7 @@
#include "mbedtls/bignum.h"
#include "mbedtls/bn_mul.h"
#include "mbedtls/platform_util.h"
#include <string.h>
@ -58,16 +59,6 @@
#define mbedtls_free free
#endif
/* Implementation that should never be optimized out by the compiler */
static void mbedtls_mpi_zeroize( mbedtls_mpi_uint *v, size_t n ) {
volatile mbedtls_mpi_uint *p = v; while( n-- ) *p++ = 0;
}
/* Implementation that should never be optimized out by the compiler */
static void mbedtls_zeroize( void *v, size_t n ) {
volatile unsigned char *p = v; while( n-- ) *p++ = 0;
}
#define ciL (sizeof(mbedtls_mpi_uint)) /* chars in limb */
#define biL (ciL << 3) /* bits in limb */
#define biH (ciL << 2) /* half limb size */
@ -81,6 +72,12 @@ static void mbedtls_zeroize( void *v, size_t n ) {
#define BITS_TO_LIMBS(i) ( (i) / biL + ( (i) % biL != 0 ) )
#define CHARS_TO_LIMBS(i) ( (i) / ciL + ( (i) % ciL != 0 ) )
/* Implementation that should never be optimized out by the compiler */
static void mbedtls_mpi_zeroize( mbedtls_mpi_uint *v, size_t n )
{
mbedtls_platform_zeroize( v, ciL * n );
}
/*
* Initialize one MPI
*/
@ -1897,7 +1894,7 @@ int mbedtls_mpi_fill_random( mbedtls_mpi *X, size_t size,
MBEDTLS_MPI_CHK( mbedtls_mpi_read_binary( X, buf, size ) );
cleanup:
mbedtls_zeroize( buf, sizeof( buf ) );
mbedtls_platform_zeroize( buf, sizeof( buf ) );
return( ret );
}