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/*############################################################################
# Copyright 2016 Intel Corporation
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
############################################################################*/
/*!
* \file
* \brief SigRl validity checking implementation.
*/
#include <string.h>
#include "epid/common/endian_convert.h"
#include "epid/common/sigrlvalid.h"
bool IsSigRlValid(GroupId const* gid, SigRl const* sig_rl, size_t sig_rl_size) {
const size_t kMinSigRlSize = sizeof(SigRl) - sizeof(SigRlEntry);
size_t input_sig_rl_size = 0;
if (!gid || !sig_rl) {
return false;
}
if (kMinSigRlSize > sig_rl_size) {
return false;
}
if (ntohl(sig_rl->n2) > (SIZE_MAX - kMinSigRlSize) / sizeof(sig_rl->bk[0])) {
return false;
}
// sanity check of intput SigRl size
input_sig_rl_size = kMinSigRlSize + ntohl(sig_rl->n2) * sizeof(sig_rl->bk[0]);
if (input_sig_rl_size != sig_rl_size) {
return false;
}
// verify that gid given and gid in SigRl match
if (0 != memcmp(gid, &sig_rl->gid, sizeof(*gid))) {
return false;
}
return true;
}
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