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- /*############################################################################
- # Copyright 2016-2017 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.
- ############################################################################*/
- #ifndef EPID_MEMBER_SRC_CONTEXT_H_
- #define EPID_MEMBER_SRC_CONTEXT_H_
- /*!
- * \file
- * \brief Member context interface.
- */
- #include <epid/member/api.h>
- #include <stddef.h>
- #include "epid/common/bitsupplier.h"
- #include "epid/common/errors.h"
- #include "epid/common/stdtypes.h"
- #include "epid/common/types.h"
- /// \cond
- typedef struct Tpm2Ctx Tpm2Ctx;
- typedef struct Epid2Params_ Epid2Params_;
- typedef struct AllowedBasenames AllowedBasenames;
- typedef struct Stack Stack;
- typedef struct EcPoint EcPoint;
- typedef struct FfElement FfElement;
- /// \endcond
- /// Member context definition
- struct MemberCtx {
- Epid2Params_* epid2_params; ///< Intel(R) EPID 2.0 params
- Tpm2Ctx* tpm2_ctx; ///< TPM2 context
- GroupPubKey pub_key; ///< group public key
- MemberPrecomp precomp; ///< Member pre-computed data
- BitSupplier rnd_func; ///< Pseudo random number generation function
- void* rnd_param; ///< Pointer to user context for rnd_func
- SigRl const* sig_rl; ///< Signature based revocation list - not owned
- AllowedBasenames* allowed_basenames; ///< Base name list
- HashAlg hash_alg; ///< Hash algorithm to use
- MembershipCredential credential; ///< Membership credential
- bool primary_key_set; ///< primary key is set
- bool precomp_ready; ///< provisioned precomputed value is ready for use
- bool is_initially_provisioned; ///< f initialized
- bool is_provisioned; ///< member fully provisioned with key material
- EcPoint const* h1; ///< Group public key h1 value
- EcPoint const* h2; ///< Group group public key h2 value
- EcPoint const* A; ///< Membership Credential A value
- FfElement const* x; ///< Membership Credential x value
- EcPoint const* w; ///< Group group public key w value
- FfElement const* e12; ///< an element in GT, = pairing (h1, g2)
- FfElement const* e22; ///< an element in GT, = pairing (h2, g2)
- FfElement const* e2w; ///< an element in GT, = pairing (h2, w)
- FfElement const* ea2; ///< an element in GT, = pairing (g1, g2)
- uint16_t join_ctr; ///< counter for join commands
- uint16_t rf_ctr; ///< a TPM commit counter for rf
- uint16_t rnu_ctr; ///< TPM counter pointing to Nr Proof related random value
- FpElemStr const* f; ///< If NULL an EPS based f is used otherwise f is
- /// stored in TPM using load external
- Stack* presigs; ///< Pre-computed signature pool
- };
- /// Pre-computed signature.
- /*!
- Serialized form of an intermediate signature that does not depend on
- basename or message. This can be used to time-shift compute time needed to
- sign a message.
- */
- #pragma pack(1)
- typedef struct PreComputedSignature {
- G1ElemStr B; ///< an element in G1
- G1ElemStr K; ///< an element in G1
- G1ElemStr T; ///< an element in G1
- G1ElemStr R1; ///< an element in G1
- GtElemStr R2; ///< an element in G1
- FpElemStr a; ///< an integer between [0, p-1]
- FpElemStr b; ///< an integer between [0, p-1]
- FpElemStr rx; ///< an integer between [0, p-1]
- uint16_t rf_ctr; ///< a TPM commit counter for rf
- FpElemStr ra; ///< an integer between [0, p-1]
- FpElemStr rb; ///< an integer between [0, p-1]
- BigNumStr rnd_bsn; ///< random basename
- } PreComputedSignature;
- #pragma pack()
- /// Minimally provision member with f
- EpidStatus EpidMemberInitialProvision(MemberCtx* ctx);
- #endif // EPID_MEMBER_SRC_CONTEXT_H_
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