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/*
* Copyright (C) 2001 Nikos Mavroyanopoulos
*
* This file is part of GNUTLS.
*
* The GNUTLS library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <gnutls_int.h>
#include <gnutls_errors.h>
#include <x509_b64.h>
#include <auth_cert.h>
#include <gnutls_cert.h>
#include <x509_asn1.h>
#include <x509_der.h>
#include <gnutls_datum.h>
#include <gnutls_mpi.h>
#include <gnutls_global.h>
void _gcry_mpi_invm( MPI x, MPI a, MPI n );
/* Converts an RSA PKCS#1 key to
* an internal structure (gnutls_private_key)
*/
int _gnutls_PKCS1key2gnutlsKey(gnutls_private_key * pkey,
gnutls_datum raw_key)
{
int result;
opaque str[MAX_PARAMETER_SIZE];
node_asn *pkey_asn;
pkey->pk_algorithm = GNUTLS_PK_RSA;
if ((result =
asn1_create_structure(_gnutls_get_gnutls_asn(),
"GNUTLS.RSAPrivateKey", &pkey_asn,
"rsakey")) != ASN_OK) {
gnutls_assert();
return _gnutls_asn2err(result);
}
if ((sizeof(pkey->params) / sizeof(GNUTLS_MPI)) < RSA_PRIVATE_PARAMS) {
gnutls_assert();
/* internal error. Increase the GNUTLS_MPIs in params */
return GNUTLS_E_INTERNAL_ERROR;
}
result = asn1_get_der(pkey_asn, raw_key.data, raw_key.size);
if (result != ASN_OK) {
gnutls_assert();
return _gnutls_asn2err(result);
}
if ((result = _gnutls_x509_read_int(pkey_asn, "rsakey.modulus",
str, sizeof(str) - 1,
&pkey->params[0])) < 0) {
gnutls_assert();
asn1_delete_structure(pkey_asn);
return result;
}
if ((result =
_gnutls_x509_read_int(pkey_asn, "rsakey.publicExponent", str,
sizeof(str) - 1,
&pkey->params[1])) < 0) {
gnutls_assert();
asn1_delete_structure(pkey_asn);
_gnutls_mpi_release(&pkey->params[0]);
return result;
}
if ((result =
_gnutls_x509_read_int(pkey_asn, "rsakey.privateExponent", str,
sizeof(str) - 1,
&pkey->params[2])) < 0) {
gnutls_assert();
_gnutls_mpi_release(&pkey->params[0]);
_gnutls_mpi_release(&pkey->params[1]);
asn1_delete_structure(pkey_asn);
return result;
}
if ((result = _gnutls_x509_read_int(pkey_asn, "rsakey.prime1",
str, sizeof(str) - 1,
&pkey->params[3])) < 0) {
gnutls_assert();
_gnutls_mpi_release(&pkey->params[0]);
_gnutls_mpi_release(&pkey->params[1]);
_gnutls_mpi_release(&pkey->params[2]);
asn1_delete_structure(pkey_asn);
return result;
}
if ((result = _gnutls_x509_read_int(pkey_asn, "rsakey.prime2",
str, sizeof(str) - 1,
&pkey->params[4])) < 0) {
gnutls_assert();
_gnutls_mpi_release(&pkey->params[0]);
_gnutls_mpi_release(&pkey->params[1]);
_gnutls_mpi_release(&pkey->params[2]);
_gnutls_mpi_release(&pkey->params[3]);
asn1_delete_structure(pkey_asn);
return result;
}
#if 1
/* Calculate the coefficient. This is because the gcrypt
* library is uses the p,q in the reverse order.
*/
pkey->params[5] =
_gnutls_mpi_snew(_gnutls_mpi_get_nbits(pkey->params[0]));
if (pkey->params[5] == NULL) {
gnutls_assert();
return GNUTLS_E_MEMORY_ERROR;
}
_gnutls_mpi_invm(pkey->params[5], pkey->params[3], pkey->params[4]);
/* p, q */
#else
if ( (result=_gnutls_x509_read_int( pkey_asn, "rsakey.coefficient",
str, sizeof(str)-1, &pkey->params[5])) < 0) {
gnutls_assert();
_gnutls_mpi_release( &pkey->params[0]);
_gnutls_mpi_release( &pkey->params[1]);
_gnutls_mpi_release( &pkey->params[2]);
_gnutls_mpi_release( &pkey->params[3]);
_gnutls_mpi_release( &pkey->params[4]);
asn1_delete_structure(pkey_asn);
return result;
}
#endif
pkey->params_size = RSA_PRIVATE_PARAMS;
asn1_delete_structure(pkey_asn);
if (gnutls_set_datum(&pkey->raw, raw_key.data, raw_key.size) < 0) {
_gnutls_mpi_release(&pkey->params[0]);
_gnutls_mpi_release(&pkey->params[1]);
_gnutls_mpi_release(&pkey->params[2]);
_gnutls_mpi_release(&pkey->params[3]);
_gnutls_mpi_release(&pkey->params[4]);
_gnutls_mpi_release(&pkey->params[5]);
gnutls_assert();
return GNUTLS_E_MEMORY_ERROR;
}
return 0;
}
int _gnutls_DSAkey2gnutlsKey(gnutls_private_key * pkey,
gnutls_datum raw_key)
{
int result;
opaque str[MAX_PARAMETER_SIZE];
node_asn *dsa_asn;
pkey->pk_algorithm = GNUTLS_PK_DSA;
if ((result =
asn1_create_structure(_gnutls_get_gnutls_asn(),
"GNUTLS.DSAPrivateKey", &dsa_asn,
"dsakey")) != ASN_OK) {
gnutls_assert();
return _gnutls_asn2err(result);
}
if ((sizeof(pkey->params) / sizeof(GNUTLS_MPI)) < DSA_PRIVATE_PARAMS) {
gnutls_assert();
/* internal error. Increase the GNUTLS_MPIs in params */
return GNUTLS_E_INTERNAL_ERROR;
}
result = asn1_get_der(dsa_asn, raw_key.data, raw_key.size);
if (result != ASN_OK) {
gnutls_assert();
return _gnutls_asn2err(result);
}
if ((result = _gnutls_x509_read_int(dsa_asn, "dsakey.p",
str, sizeof(str) - 1,
&pkey->params[0])) < 0) {
gnutls_assert();
asn1_delete_structure(dsa_asn);
return result;
}
if ((result = _gnutls_x509_read_int(dsa_asn, "dsakey.q",
str, sizeof(str) - 1,
&pkey->params[1])) < 0) {
gnutls_assert();
asn1_delete_structure(dsa_asn);
_gnutls_mpi_release(&pkey->params[0]);
return result;
}
if ((result = _gnutls_x509_read_int(dsa_asn, "dsakey.g",
str, sizeof(str) - 1,
&pkey->params[2])) < 0) {
gnutls_assert();
asn1_delete_structure(dsa_asn);
_gnutls_mpi_release(&pkey->params[0]);
_gnutls_mpi_release(&pkey->params[1]);
return result;
}
if ((result = _gnutls_x509_read_int(dsa_asn, "dsakey.Y",
str, sizeof(str) - 1,
&pkey->params[3])) < 0) {
gnutls_assert();
asn1_delete_structure(dsa_asn);
_gnutls_mpi_release(&pkey->params[0]);
_gnutls_mpi_release(&pkey->params[1]);
_gnutls_mpi_release(&pkey->params[2]);
return result;
}
if ((result = _gnutls_x509_read_int(dsa_asn, "dsakey.priv",
str, sizeof(str) - 1,
&pkey->params[4])) < 0) {
gnutls_assert();
asn1_delete_structure(dsa_asn);
_gnutls_mpi_release(&pkey->params[0]);
_gnutls_mpi_release(&pkey->params[1]);
_gnutls_mpi_release(&pkey->params[2]);
_gnutls_mpi_release(&pkey->params[3]);
return result;
}
pkey->params_size = DSA_PRIVATE_PARAMS;
asn1_delete_structure(dsa_asn);
if (gnutls_set_datum(&pkey->raw, raw_key.data, raw_key.size) < 0) {
_gnutls_mpi_release(&pkey->params[0]);
_gnutls_mpi_release(&pkey->params[1]);
_gnutls_mpi_release(&pkey->params[2]);
_gnutls_mpi_release(&pkey->params[3]);
_gnutls_mpi_release(&pkey->params[4]);
gnutls_assert();
return GNUTLS_E_MEMORY_ERROR;
}
return 0;
}
void _gnutls_free_private_key(gnutls_private_key pkey)
{
int i;
for (i = 0; i < pkey.params_size; i++) {
_gnutls_mpi_release(&pkey.params[i]);
}
gnutls_free_datum(&pkey.raw);
return;
}
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