1 /*############################################################################ 2 # Copyright 2017 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 /// Tiny member ProvisionKey implementation. 17 /*! \file */ 18 19 #define EXPORT_EPID_APIS 20 #include "epid/member/api.h" 21 #include "epid/member/software_member.h" 22 #include "epid/member/tiny/math/efq.h" 23 #include "epid/member/tiny/math/efq2.h" 24 #include "epid/member/tiny/math/fp.h" 25 #include "epid/member/tiny/math/mathtypes.h" 26 #include "epid/member/tiny/math/pairing.h" 27 #include "epid/member/tiny/math/serialize.h" 28 #include "epid/member/tiny/src/context.h" 29 #include "epid/member/tiny/src/native_types.h" 30 #include "epid/member/tiny/src/serialize.h" 31 #include "epid/member/tiny/src/validate.h" 32 #include "epid/member/tiny/stdlib/tiny_stdlib.h" 33 34 static EccPointFq2 const epid20_g2 = { 35 {{{{0xBF282394, 0xF6021343, 0x3D32470E, 0xD25D5268, 0x743CCF22, 0x21670413, 36 0x4AA3DA05, 0xE20171C5}}}, 37 {{{0xBAA189BE, 0x7DF7B212, 0x289653E2, 0x43433BF6, 0x4FBB5656, 0x46CCDC25, 38 0x53A85A80, 0x592D1EF6}}}}, 39 {{{{0xDD2335AE, 0x414DB822, 0x4D916838, 0x55E8B59A, 0x312826BD, 0xC621E703, 40 0x51FFD350, 0xAE60A4E7}}}, 41 {{{0x51B92421, 0x2C90FE89, 0x9093D613, 0x2CDC6181, 0x7645E253, 0xF80274F8, 42 0x89AFE5AD, 0x1AB442F9}}}}}; 43 44 EpidStatus EPID_API EpidProvisionKey(MemberCtx* ctx, GroupPubKey const* pub_key, 45 PrivKey const* priv_key, 46 MemberPrecomp const* precomp_str) { 47 NativeGroupPubKey native_pub_key; 48 NativePrivKey native_priv_key; 49 if (!pub_key || !priv_key || !ctx) { 50 return kEpidBadArgErr; 51 } 52 if (0 != memcmp(&pub_key->gid, &priv_key->gid, sizeof(GroupId))) { 53 return kEpidBadArgErr; 54 } 55 GroupPubKeyDeserialize(&native_pub_key, pub_key); 56 if (!GroupPubKeyIsInRange(&native_pub_key)) { 57 return kEpidBadArgErr; 58 } 59 60 PrivKeyDeserialize(&native_priv_key, priv_key); 61 if (!PrivKeyIsInRange(&native_priv_key) || 62 !PrivKeyIsInGroup(&native_priv_key, &native_pub_key, 63 &ctx->pairing_state)) { 64 memset(&native_priv_key.f, 0, sizeof(native_priv_key.f)); 65 return kEpidBadArgErr; 66 } 67 ctx->f = native_priv_key.f; 68 memset(&native_priv_key.f, 0, sizeof(native_priv_key.f)); 69 ctx->f_is_set = 1; 70 71 ctx->credential.gid = priv_key->gid; 72 ctx->credential.A = priv_key->A; 73 ctx->credential.x = priv_key->x; 74 ctx->pub_key = *pub_key; 75 ctx->is_provisioned = 1; 76 77 if (precomp_str) { 78 PreCompDeserialize(&ctx->precomp, precomp_str); 79 } else { 80 PairingCompute(&ctx->precomp.ea2, &native_priv_key.cred.A, &epid20_g2, 81 &ctx->pairing_state); 82 PairingCompute(&ctx->precomp.e12, &native_pub_key.h1, &epid20_g2, 83 &ctx->pairing_state); 84 PairingCompute(&ctx->precomp.e22, &native_pub_key.h2, &epid20_g2, 85 &ctx->pairing_state); 86 PairingCompute(&ctx->precomp.e2w, &native_pub_key.h2, &native_pub_key.w, 87 &ctx->pairing_state); 88 } 89 return kEpidNoErr; 90 } 91
