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/*
* Copyright (C) 2001 Nikos Mavroyanopoulos
*
* This file is part of GNUTLS.
*
* GNUTLS is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* GNUTLS is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#include <gnutls_int.h>
#include <x509_asn1.h>
#include <gnutls_errors.h>
/* Functions that refer to the libgcrypt library.
*/
void _gnutls_mpi_release( GNUTLS_MPI* x) {
if (*x==NULL) return;
gcry_mpi_release(*x);
*x=NULL;
}
int _gnutls_mpi_scan( GNUTLS_MPI *ret_mpi, const opaque *buffer, size_t *nbytes ) {
return gcry_mpi_scan( ret_mpi, GCRYMPI_FMT_USG, buffer, nbytes);
}
int _gnutls_mpi_scan_pgp( GNUTLS_MPI *ret_mpi, const opaque *buffer, size_t *nbytes ) {
return gcry_mpi_scan( ret_mpi, GCRYMPI_FMT_PGP, buffer, nbytes);
}
int _gnutls_mpi_print( opaque *buffer, size_t *nbytes, const GNUTLS_MPI a ) {
return gcry_mpi_print( GCRYMPI_FMT_USG, buffer, nbytes, a);
}
/* Always has the first bit zero */
int _gnutls_mpi_print_lz( opaque *buffer, size_t *nbytes, const GNUTLS_MPI a ) {
return gcry_mpi_print( GCRYMPI_FMT_STD, buffer, nbytes, a);
}
/* this function reads an integer
* from asn1 structs. Combines the read and mpi_scan
* steps.
*/
int _gnutls_x509_read_int( node_asn* node, char* value, char* tmpstr, int tmpstr_size, GNUTLS_MPI* ret_mpi) {
int len, result;
len = tmpstr_size - 1;
result = asn1_read_value(node, value, tmpstr, &len);
if (result != ASN_OK) {
gnutls_assert();
return _gnutls_asn2err(result);
}
if (_gnutls_mpi_scan( ret_mpi, tmpstr, &len) != 0) {
gnutls_assert();
return GNUTLS_E_MPI_SCAN_FAILED;
}
return 0;
}
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