diff options
Diffstat (limited to 'thirdparty/mbedtls/library/ecp.c')
| -rw-r--r-- | thirdparty/mbedtls/library/ecp.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/thirdparty/mbedtls/library/ecp.c b/thirdparty/mbedtls/library/ecp.c index db36191b9b..040c20bd38 100644 --- a/thirdparty/mbedtls/library/ecp.c +++ b/thirdparty/mbedtls/library/ecp.c @@ -2724,6 +2724,7 @@ int mbedtls_ecp_gen_privkey( const mbedtls_ecp_group *grp, { /* SEC1 3.2.1: Generate d such that 1 <= n < N */ int count = 0; + unsigned cmp = 0; /* * Match the procedure given in RFC 6979 (deterministic ECDSA): @@ -2748,9 +2749,14 @@ int mbedtls_ecp_gen_privkey( const mbedtls_ecp_group *grp, */ if( ++count > 30 ) return( MBEDTLS_ERR_ECP_RANDOM_FAILED ); + + ret = mbedtls_mpi_lt_mpi_ct( d, &grp->N, &cmp ); + if( ret != 0 ) + { + goto cleanup; + } } - while( mbedtls_mpi_cmp_int( d, 1 ) < 0 || - mbedtls_mpi_cmp_mpi( d, &grp->N ) >= 0 ); + while( mbedtls_mpi_cmp_int( d, 1 ) < 0 || cmp != 1 ); } #endif /* ECP_SHORTWEIERSTRASS */ |