1 /*############################################################################ 2 # Copyright 2016 Intel Corporation 3 # 4 # Licensed under the Apache License, Version 2.0 (the "License"); 5 # you may not use this file except in compliance with the License. 6 # You may obtain a copy of the License at 7 # 8 # http://www.apache.org/licenses/LICENSE-2.0 9 # 10 # Unless required by applicable law or agreed to in writing, software 11 # distributed under the License is distributed on an "AS IS" BASIS, 12 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 # See the License for the specific language governing permissions and 14 # limitations under the License. 15 ############################################################################*/ 16 17 /*! 18 * \file 19 * \brief SigRl validity checking implementation. 20 */ 21 22 #include <string.h> 23 24 #include "epid/common/src/endian_convert.h" 25 #include "epid/common/src/sigrlvalid.h" 26 27 bool IsSigRlValid(GroupId const* gid, SigRl const* sig_rl, size_t sig_rl_size) { 28 const size_t kMinSigRlSize = sizeof(SigRl) - sizeof(SigRlEntry); 29 size_t input_sig_rl_size = 0; 30 if (!gid || !sig_rl || kMinSigRlSize > sig_rl_size) { 31 return false; 32 } 33 if (ntohl(sig_rl->n2) > (SIZE_MAX - kMinSigRlSize) / sizeof(sig_rl->bk[0])) { 34 return false; 35 } 36 // sanity check of intput SigRl size 37 input_sig_rl_size = kMinSigRlSize + ntohl(sig_rl->n2) * sizeof(sig_rl->bk[0]); 38 if (input_sig_rl_size != sig_rl_size) { 39 return false; 40 } 41 // verify that gid given and gid in SigRl match 42 if (0 != memcmp(gid, &sig_rl->gid, sizeof(*gid))) { 43 return false; 44 } 45 return true; 46 } 47
