lib/mbedtls
1
0
Fork 0
mirror of https://github.com/Mbed-TLS/mbedtls.git synced 2025-12-24 17:41:01 +03:00
Code Activity

gen_prime: ensure X = 3 mod 4 always (2x speed-up)

Browse Source
This commit is contained in:
Manuel Pégourié-Gonnard
2013-11-22 17:35:28 +01:00
parent d1bac4ae55
commit 711507a726
1 changed files with 3 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
library/bignum.c
View File

@@ -1969,9 +1969,9 @@ int mpi_gen_prime( mpi *X, size_t nbits, int dh_flag,
if( ret != POLARSSL_ERR_MPI_NOT_ACCEPTABLE )
goto cleanup;
MPI_CHK( mpi_add_int( &Y, X, 1 ) );
MPI_CHK( mpi_add_int( X, X, 2 ) );
MPI_CHK( mpi_shift_r( &Y, 1 ) );
/* Keep X = 3 mod 4 */
MPI_CHK( mpi_add_int( X, X, 4 ) );
MPI_CHK( mpi_add_int( &Y, &Y, 2 ) );
}
}