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/*
* Copyright 2021, The Android Open Source Project
*
* 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.
*/
#if !defined(EIC_INSIDE_LIBEIC_H) && !defined(EIC_COMPILATION)
#error "Never include this file directly, include libeic.h instead."
#endif
#ifndef ANDROID_HARDWARE_IDENTITY_EIC_SESSION_H
#define ANDROID_HARDWARE_IDENTITY_EIC_SESSION_H
#include "EicOps.h"
#ifdef __cplusplus
extern "C" {
#endif
typedef struct {
// A non-zero number unique for this EicSession instance
uint32_t id;
// The challenge generated at construction time by eicSessionInit().
uint64_t authChallenge;
uint8_t ephemeralPrivateKey[EIC_P256_PRIV_KEY_SIZE];
uint8_t ephemeralPublicKey[EIC_P256_PUB_KEY_SIZE];
uint8_t readerEphemeralPublicKey[EIC_P256_PUB_KEY_SIZE];
uint8_t sessionTranscriptSha256[EIC_SHA256_DIGEST_SIZE];
} EicSession;
bool eicSessionInit(EicSession* ctx);
bool eicSessionShutdown(EicSession* ctx);
bool eicSessionGetId(EicSession* ctx, uint32_t* outId);
bool eicSessionGetAuthChallenge(EicSession* ctx, uint64_t* outAuthChallenge);
bool eicSessionGetEphemeralKeyPair(EicSession* ctx,
uint8_t ephemeralPrivateKey[EIC_P256_PRIV_KEY_SIZE]);
bool eicSessionSetReaderEphemeralPublicKey(
EicSession* ctx, const uint8_t readerEphemeralPublicKey[EIC_P256_PUB_KEY_SIZE]);
bool eicSessionSetSessionTranscript(EicSession* ctx, const uint8_t* sessionTranscript,
size_t sessionTranscriptSize);
// Looks up an active session with the given id.
//
// Returns NULL if no active session with the given id is found.
//
EicSession* eicSessionGetForId(uint32_t sessionId);
#ifdef __cplusplus
}
#endif
#endif // ANDROID_HARDWARE_IDENTITY_EIC_PRESENTATION_H
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