diff options
Diffstat (limited to 'thirdparty/mbedtls/library/rsa.c')
| -rw-r--r-- | thirdparty/mbedtls/library/rsa.c | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/thirdparty/mbedtls/library/rsa.c b/thirdparty/mbedtls/library/rsa.c index 42becbf17b..a25c633bc6 100644 --- a/thirdparty/mbedtls/library/rsa.c +++ b/thirdparty/mbedtls/library/rsa.c @@ -841,15 +841,14 @@ static int rsa_prepare_blinding( mbedtls_rsa_context *ctx, * which one, we just loop and choose new values for both of them. * (Each iteration succeeds with overwhelming probability.) */ ret = mbedtls_mpi_inv_mod( &ctx->Vi, &ctx->Vi, &ctx->N ); - if( ret == MBEDTLS_ERR_MPI_NOT_ACCEPTABLE ) - continue; - if( ret != 0 ) + if( ret != 0 && ret != MBEDTLS_ERR_MPI_NOT_ACCEPTABLE ) goto cleanup; - /* Finish the computation of Vf^-1 = R * (R Vf)^-1 */ - MBEDTLS_MPI_CHK( mbedtls_mpi_mul_mpi( &ctx->Vi, &ctx->Vi, &R ) ); - MBEDTLS_MPI_CHK( mbedtls_mpi_mod_mpi( &ctx->Vi, &ctx->Vi, &ctx->N ) ); - } while( 0 ); + } while( ret == MBEDTLS_ERR_MPI_NOT_ACCEPTABLE ); + + /* Finish the computation of Vf^-1 = R * (R Vf)^-1 */ + MBEDTLS_MPI_CHK( mbedtls_mpi_mul_mpi( &ctx->Vi, &ctx->Vi, &R ) ); + MBEDTLS_MPI_CHK( mbedtls_mpi_mod_mpi( &ctx->Vi, &ctx->Vi, &ctx->N ) ); /* Blinding value: Vi = Vf^(-e) mod N * (Vi already contains Vf^-1 at this point) */ |