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Merge remote-tracking branch 'upstream-restricted/pr/419' into development-restricted

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Resolved simple conflicts caused by the independent addition of
calls to mbedtls_zeroize with sometimes whitespace or comment
differences.
This commit is contained in:
Gilles Peskine
2017-11-28 16:16:27 +01:00
parent 9c8ac0ce2c 509fef7de3
commit 41e974178f
4 changed files with 23 additions and 10 deletions
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18
library/bignum.c
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@ -63,6 +63,7 @@ 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;
}
@ -676,16 +677,20 @@ cleanup:
int mbedtls_mpi_read_binary( mbedtls_mpi *X, const unsigned char *buf, size_t buflen )
{
int ret;
size_t i, j, n;
size_t i, j;
size_t const limbs = CHARS_TO_LIMBS( buflen );
for( n = 0; n < buflen; n++ )
if( buf[n] != 0 )
break;
/* Ensure that target MPI has exactly the necessary number of limbs */
if( X->n != limbs )
{
mbedtls_mpi_free( X );
mbedtls_mpi_init( X );
MBEDTLS_MPI_CHK( mbedtls_mpi_grow( X, limbs ) );
}
MBEDTLS_MPI_CHK( mbedtls_mpi_grow( X, CHARS_TO_LIMBS( buflen - n ) ) );
MBEDTLS_MPI_CHK( mbedtls_mpi_lset( X, 0 ) );
for( i = buflen, j = 0; i > n; i--, j++ )
for( i = buflen, j = 0; i > 0; i--, j++ )
X->p[j / ciL] |= ((mbedtls_mpi_uint) buf[i - 1]) << ((j % ciL) << 3);
cleanup:
@ -1887,7 +1892,6 @@ int mbedtls_mpi_fill_random( mbedtls_mpi *X, size_t size,
cleanup:
mbedtls_zeroize( buf, sizeof( buf ) );
return( ret );
}

4
library/ecp.c
View File

@ -1953,7 +1953,6 @@ int mbedtls_ecp_gen_keypair_base( mbedtls_ecp_group *grp,
{
/* SEC1 3.2.1: Generate d such that 1 <= n < N */
int count = 0;
unsigned char rnd[MBEDTLS_ECP_MAX_BYTES];
/*
* Match the procedure given in RFC 6979 (deterministic ECDSA):
@ -1964,8 +1963,7 @@ int mbedtls_ecp_gen_keypair_base( mbedtls_ecp_group *grp,
*/
do
{
MBEDTLS_MPI_CHK( f_rng( p_rng, rnd, n_size ) );
MBEDTLS_MPI_CHK( mbedtls_mpi_read_binary( d, rnd, n_size ) );
MBEDTLS_MPI_CHK( mbedtls_mpi_fill_random( d, n_size, f_rng, p_rng ) );
MBEDTLS_MPI_CHK( mbedtls_mpi_shift_r( d, 8 * n_size - grp->nbits ) );
/*