/* SPDX-License-Identifier: BSD-2-Clause */
/*******************************************************************************
 * Copyright 2017-2018, Fraunhofer SIT sponsored by Infineon Technologies AG
 * All rights reserved.
 *******************************************************************************/

#ifdef HAVE_CONFIG_H
#include "config.h" // IWYU pragma: keep
#endif

#include <stdlib.h> // for NULL, EXIT_FAILURE, EXIT_SUCCESS
#include <string.h> // for memset

#include "tss2_common.h"     // for TSS2_RC_SUCCESS, TSS2_RC
#include "tss2_esys.h"       // for Esys_Free, ESYS_TR_NONE, Esys_FlushContext
#include "tss2_tpm2_types.h" // for TPM2B_PUBLIC, TPM2_ALG_SHA256, TPM2B_EC...

#define LOGMODULE test
#include "util/log.h" // for goto_if_error, LOG_ERROR, LOG_INFO

/** This test is intended to test Esys_ECDH_ZGen.
 *   based on an ECC key
 * created with Esys_CreatePrimary and a dummy ECC point.
 *
 * Tested ESYS commands:
 *  - Esys_CreatePrimary() (M)
 *  - Esys_ECDH_ZGen() (M)
 *  - Esys_FlushContext() (M)
 *  - Esys_StartAuthSession() (M)
 *
 * @param[in,out] esys_context The ESYS_CONTEXT.
 * @retval EXIT_FAILURE
 * @retval EXIT_SUCCESS
 */

int
test_esys_ecdh_zgen(ESYS_CONTEXT *esys_context) {
    TSS2_RC      r;
    ESYS_TR      eccHandle = ESYS_TR_NONE;
    ESYS_TR      session = ESYS_TR_NONE;
    TPMT_SYM_DEF symmetric
        = { .algorithm = TPM2_ALG_AES, .keyBits = { .aes = 128 }, .mode = { .aes = TPM2_ALG_CFB } };
    TPMA_SESSION sessionAttributes;
    TPM2B_NONCE  nonceCaller = { .size = 20, .buffer = { 1,  2,  3,  4,  5,  6,  7,  8,  9,  10,
                                                         11, 12, 13, 14, 15, 16, 17, 18, 19, 20 } };

    TPM2B_PUBLIC        *outPublic = NULL;
    TPM2B_CREATION_DATA *creationData = NULL;
    TPM2B_DIGEST        *creationHash = NULL;
    TPMT_TK_CREATION    *creationTicket = NULL;
    TPM2B_ECC_POINT     *outPoint = NULL;

    memset(&sessionAttributes, 0, sizeof sessionAttributes);

    r = Esys_StartAuthSession(esys_context, ESYS_TR_NONE, ESYS_TR_NONE, ESYS_TR_NONE, ESYS_TR_NONE,
                              ESYS_TR_NONE, &nonceCaller, TPM2_SE_HMAC, &symmetric, TPM2_ALG_SHA256,
                              &session);
    goto_if_error(r, "Error: During initialization of session", error);

    TPM2B_SENSITIVE_CREATE inSensitive
        = { .size = 0,
            .sensitive = { .userAuth = { .size = 0, .buffer = { 0 } },
                           .data = { .size = 0, .buffer = { 0 } } } };
    TPM2B_PUBLIC inPublicECC = {
        .size = 0,
        .publicArea = {
            .type = TPM2_ALG_ECC,
            .nameAlg = TPM2_ALG_SHA256,
            .objectAttributes = (TPMA_OBJECT_USERWITHAUTH |
                                 TPMA_OBJECT_DECRYPT |
                                 TPMA_OBJECT_FIXEDTPM |
                                 TPMA_OBJECT_FIXEDPARENT |
                                 TPMA_OBJECT_SENSITIVEDATAORIGIN),
            .authPolicy = {
                 .size = 0,
             },
            .parameters.eccDetail = {
                 .symmetric = {
                     .algorithm = TPM2_ALG_NULL,
                     .keyBits.aes = 128,
                     .mode.aes = TPM2_ALG_CFB,
                 },
                 .scheme = {
                      .scheme = TPM2_ALG_ECDH,
                      .details = {.ecdh = {.hashAlg = TPM2_ALG_SHA256}
                      }
                  },
                 .curveID = TPM2_ECC_NIST_P256,
                 .kdf = {.scheme = TPM2_ALG_NULL }
             },
            .unique.ecc = {
                 .x = {.size = 0,.buffer = {}},
                 .y = {.size = 0,.buffer = {}}
             }
            ,
        }
    };
    LOG_INFO("\nECC key will be created.");
    TPM2B_PUBLIC inPublic = inPublicECC;

    TPM2B_DATA outsideInfo = {
        .size = 0,
        .buffer = {},
    };

    TPML_PCR_SELECTION creationPCR = {
        .count = 0,
    };

    TPM2B_AUTH authValue = { .size = 0, .buffer = {} };

    r = Esys_TR_SetAuth(esys_context, ESYS_TR_RH_OWNER, &authValue);
    goto_if_error(r, "Error: TR_SetAuth", error);

    r = Esys_CreatePrimary(esys_context, ESYS_TR_RH_OWNER, session, ESYS_TR_NONE, ESYS_TR_NONE,
                           &inSensitive, &inPublic, &outsideInfo, &creationPCR, &eccHandle,
                           &outPublic, &creationData, &creationHash, &creationTicket);
    goto_if_error(r, "Error esys create primary", error);

    TPM2B_ECC_POINT inPoint= {
        .size = 0,
        .point = {
            .x = {
                 .size =  32,
                 .buffer = {
                     0x25, 0xdb, 0x1f, 0x8b, 0xbc, 0xfa, 0xbc, 0x31,
                     0xf8, 0x17, 0x6a, 0xcb, 0xb2, 0xf8, 0x40, 0xa3,
                     0xb6, 0xa5, 0xd3, 0x40, 0x65, 0x9d, 0x37, 0xee,
                     0xd9, 0xfd, 0x52, 0x47, 0xf5, 0x14, 0xd5, 0x98
                 },
             },
            .y = {
                 .size = 32,
                 .buffer = {
                     0xed, 0x62, 0x3e, 0x3d, 0xd2, 0x09, 0x08, 0xcf,
                     0x58, 0x3c, 0x81, 0x4b, 0xbf, 0x65, 0x7e, 0x08,
                     0xab, 0x9f, 0x40, 0xff, 0xea, 0x51, 0xda, 0x21,
                     0x29, 0x8c, 0xe2, 0x4d, 0xeb, 0x34, 0x4c, 0xcc
                 }
             }
        }
    };

    r = Esys_ECDH_ZGen(esys_context, eccHandle, ESYS_TR_PASSWORD, ESYS_TR_NONE, ESYS_TR_NONE,
                       &inPoint, &outPoint);
    goto_if_error(r, "Error: ECDH_ZGen", error);

    r = Esys_FlushContext(esys_context, eccHandle);
    goto_if_error(r, "Error during FlushContext", error);

    r = Esys_FlushContext(esys_context, session);
    goto_if_error(r, "Flushing context", error);

    Esys_Free(outPublic);
    Esys_Free(creationData);
    Esys_Free(creationHash);
    Esys_Free(creationTicket);
    Esys_Free(outPoint);
    return EXIT_SUCCESS;

error:
    LOG_ERROR("\nError Code: %x\n", r);

    if (session != ESYS_TR_NONE) {
        if (Esys_FlushContext(esys_context, session) != TSS2_RC_SUCCESS) {
            LOG_ERROR("Cleanup session failed.");
        }
    }

    if (eccHandle != ESYS_TR_NONE) {
        if (Esys_FlushContext(esys_context, eccHandle) != TSS2_RC_SUCCESS) {
            LOG_ERROR("Cleanup eccHandle failed.");
        }
    }

    Esys_Free(outPublic);
    Esys_Free(creationData);
    Esys_Free(creationHash);
    Esys_Free(creationTicket);
    Esys_Free(outPoint);
    return EXIT_FAILURE;
}

int
test_invoke_esys(ESYS_CONTEXT *esys_context) {
    return test_esys_ecdh_zgen(esys_context);
}
