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Adapt key checking functions for Curve25519

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Manuel Pégourié-Gonnard 2013-12-04 11:08:01 +01:00
parent 661536677b
commit 312d2e8ea2
4 changed files with 125 additions and 19 deletions
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6
library/ecp_curves.c
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@ -357,6 +357,12 @@ static int ecp_use_curve25519( ecp_group *grp )
MPI_CHK( mpi_sub_int( &grp->P, &grp->P, 19 ) );
grp->pbits = mpi_msb( &grp->P );
/* Y intentionaly not set, since we use x/z coordinates.
* This is used as a marker to identify Montgomery curves! */
MPI_CHK( mpi_lset( &grp->G.X, 9 ) );
MPI_CHK( mpi_lset( &grp->G.Z, 1 ) );
mpi_free( &grp->G.Y );
/* Actually, the required msb for private keys */
grp->nbits = 254;