Commit ff7fe670 authored by Paul Bakker's avatar Paul Bakker
Browse files

- Minor DHM code cleanup/comments

parent f55ec08b
......@@ -64,7 +64,7 @@ int dhm_read_params( dhm_context *ctx,
* \brief Setup and write the ServerKeyExchange parameters
*
* \param ctx DHM context
* \param x_size private value size in bits
* \param x_size private value size in bytes
* \param output destination buffer
* \param olen number of chars written
* \param f_rng RNG function
......
......@@ -99,20 +99,22 @@ int dhm_make_params( dhm_context *ctx, int x_size,
unsigned char *p;
/*
* generate X and calculate GX = G^X mod P
* Generate X as large as possible ( < P )
*/
n = x_size / sizeof( t_int );
MPI_CHK( mpi_grow( &ctx->X, n ) );
MPI_CHK( mpi_lset( &ctx->X, 0 ) );
n = x_size - 1;
p = (unsigned char *) ctx->X.p;
for( i = 0; i < n; i++ )
for( i = 0; i < x_size - 1; i++ )
*p++ = (unsigned char) f_rng( p_rng );
while( mpi_cmp_mpi( &ctx->X, &ctx->P ) >= 0 )
mpi_shift_r( &ctx->X, 1 );
/*
* Calculate GX = G^X mod P
*/
MPI_CHK( mpi_exp_mod( &ctx->GX, &ctx->G, &ctx->X,
&ctx->P , &ctx->RP ) );
......
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