123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127 |
- /*############################################################################
- # Copyright 2017 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.
- ############################################################################*/
- /// EpidMemberStartup implementation.
- /*!
- * \file
- */
- #include <epid/member/api.h>
- #include <string.h>
- #include "epid/common/math/ecgroup.h"
- #include "epid/common/math/finitefield.h"
- #include "epid/common/src/epid2params.h"
- #include "epid/common/types.h" // MemberPrecomp
- #include "epid/member/src/context.h"
- #include "epid/member/src/precomp.h"
- #include "epid/member/src/storage.h"
- /// Handle SDK Error with Break
- #define BREAK_ON_EPID_ERROR(ret) \
- if (kEpidNoErr != (ret)) { \
- break; \
- }
- static EpidStatus MemberReadPrecomputation(MemberCtx* ctx,
- MemberPrecomp const* precomp);
- EpidStatus EpidMemberStartup(MemberCtx* ctx) {
- EpidStatus sts = kEpidErr;
- uint32_t const nv_index = 0x01c10100;
- if (!ctx) {
- return kEpidBadArgErr;
- }
- do {
- EcGroup* G1 = ctx->epid2_params->G1;
- EcGroup* G2 = ctx->epid2_params->G2;
- FiniteField* Fp = ctx->epid2_params->Fp;
- EcPoint* A = (EcPoint*)ctx->A;
- FfElement* x = (FfElement*)ctx->x;
- EcPoint* h1 = (EcPoint*)ctx->h1;
- EcPoint* h2 = (EcPoint*)ctx->h2;
- EcPoint* w = (EcPoint*)ctx->w;
- sts = EpidNvReadMembershipCredential(ctx->tpm2_ctx, nv_index, &ctx->pub_key,
- &ctx->credential);
- BREAK_ON_EPID_ERROR(sts);
- if (!ctx->precomp_ready) {
- sts = PrecomputeMemberPairing(ctx->epid2_params, &ctx->pub_key,
- &ctx->credential.A, &ctx->precomp);
- BREAK_ON_EPID_ERROR(sts);
- ctx->precomp_ready = true;
- }
- if (!ctx->is_provisioned && !ctx->is_initially_provisioned) {
- sts = EpidMemberInitialProvision(ctx);
- BREAK_ON_EPID_ERROR(sts);
- }
- sts = ReadEcPoint(G1, &ctx->credential.A, sizeof(ctx->credential.A), A);
- BREAK_ON_EPID_ERROR(sts);
- sts = ReadFfElement(Fp, &ctx->credential.x, sizeof(ctx->credential.x), x);
- BREAK_ON_EPID_ERROR(sts);
- sts = ReadEcPoint(G1, &ctx->pub_key.h1, sizeof(ctx->pub_key.h1), h1);
- BREAK_ON_EPID_ERROR(sts);
- sts = ReadEcPoint(G1, &ctx->pub_key.h2, sizeof(ctx->pub_key.h2), h2);
- BREAK_ON_EPID_ERROR(sts);
- sts = ReadEcPoint(G2, &ctx->pub_key.w, sizeof(ctx->pub_key.w), w);
- BREAK_ON_EPID_ERROR(sts);
- sts = MemberReadPrecomputation(ctx, &ctx->precomp);
- BREAK_ON_EPID_ERROR(sts);
- sts = kEpidNoErr;
- } while (0);
- return sts;
- }
- static EpidStatus MemberReadPrecomputation(MemberCtx* ctx,
- MemberPrecomp const* precomp) {
- EpidStatus sts = kEpidErr;
- if (!ctx || !precomp || !ctx->epid2_params || !ctx) {
- return kEpidBadArgErr;
- }
- do {
- FiniteField* GT = ctx->epid2_params->GT;
- FfElement* e12 = (FfElement*)ctx->e12;
- FfElement* e22 = (FfElement*)ctx->e22;
- FfElement* e2w = (FfElement*)ctx->e2w;
- FfElement* ea2 = (FfElement*)ctx->ea2;
- sts = ReadFfElement(GT, &precomp->e12, sizeof(precomp->e12), e12);
- BREAK_ON_EPID_ERROR(sts);
- sts = ReadFfElement(GT, &precomp->e22, sizeof(precomp->e22), e22);
- BREAK_ON_EPID_ERROR(sts);
- sts = ReadFfElement(GT, &precomp->e2w, sizeof(precomp->e2w), e2w);
- BREAK_ON_EPID_ERROR(sts);
- sts = ReadFfElement(GT, &precomp->ea2, sizeof(precomp->ea2), ea2);
- BREAK_ON_EPID_ERROR(sts);
- sts = kEpidNoErr;
- } while (0);
- return sts;
- }
|