/* SPDX-License-Identifier: BSD-2-Clause */
/*******************************************************************************
 * Copyright (c) 2020, Intel Corporation
 * All rights reserved.
 *******************************************************************************/

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

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

#include "test-esys.h"       // for EXIT_SKIP, test_invoke_esys
#include "tss2_common.h"     // for TSS2_RC, TSS2_RC_SUCCESS
#include "tss2_esys.h"       // for ESYS_TR_NONE, Esys_FlushContext, Esys_H...
#include "tss2_tpm2_types.h" // for TPM2_ALG_SHA256, TPM2_SE_HMAC, TPM2B_AUTH

#define LOGDEFAULT LOGLEVEL_INFO
#define LOGMODULE  test
#include "util/log.h" // for LOGLEVEL_INFO, LOG_DEBUG, goto_if_error

/** Test auth verification in clear command
 *
 * After TPM2_Clear command is executed all auth values for
 * owner, platofrm and lockout are set to empty buffers and
 * the empty auth values should be used fot HMAC verification
 * in the response.
 *
 * @param[in,out] esys_context The ESYS_CONTEXT.
 * @retval EXIT_SUCCESS
 * @retval EXIT_SKIP
 * @retval EXIT_FAILURE
 */
int
test_esys_clear_auth(ESYS_CONTEXT *esys_context) {
    TSS2_RC r;
    ESYS_TR session = ESYS_TR_NONE;
    int     failure_return = EXIT_FAILURE;

    TPMT_SYM_DEF symmetric = { .algorithm = TPM2_ALG_XOR,
                               .keyBits = { .exclusiveOr = TPM2_ALG_SHA256 },
                               .mode = { .aes = TPM2_ALG_CFB } };

    /* Test lockout authorization */
    LOG_DEBUG("Test LOCKOUT authorization");
    LOG_DEBUG("Start Auth Session");
    r = Esys_StartAuthSession(esys_context, ESYS_TR_NONE, ESYS_TR_NONE, ESYS_TR_NONE, ESYS_TR_NONE,
                              ESYS_TR_NONE, NULL, TPM2_SE_HMAC, &symmetric, TPM2_ALG_SHA256,
                              &session);
    goto_if_error(r, "Error: During initialization of session", error);

    TPM2B_AUTH auth = {
        .size = 16,
        .buffer = "deadbeefdeadbeef",
    };

    LOG_DEBUG("Set Auth");
    r = Esys_HierarchyChangeAuth(esys_context, ESYS_TR_RH_LOCKOUT, ESYS_TR_PASSWORD, ESYS_TR_NONE,
                                 ESYS_TR_NONE, &auth);

    goto_if_error(r, "Error: During Esys_ObjectChangeAuth", error);
    Esys_TR_SetAuth(esys_context, ESYS_TR_RH_LOCKOUT, &auth);

    LOG_DEBUG("Clear");
    r = Esys_Clear(esys_context, ESYS_TR_RH_LOCKOUT, session, ESYS_TR_NONE, ESYS_TR_NONE);
    goto_if_error(r, "Error: During Esys_Clear", error);

    r = Esys_FlushContext(esys_context, session);
    goto_if_error(r, "Error: During Esys_FlushContext", error);

    /* Test platform authorization */
    LOG_DEBUG("Test PLATFORM authorization");
    LOG_DEBUG("Start Auth Session");
    r = Esys_StartAuthSession(esys_context, ESYS_TR_NONE, ESYS_TR_NONE, ESYS_TR_NONE, ESYS_TR_NONE,
                              ESYS_TR_NONE, NULL, TPM2_SE_HMAC, &symmetric, TPM2_ALG_SHA256,
                              &session);
    goto_if_error(r, "Error: During initialization of session", error);

    LOG_DEBUG("Set Auth");
    r = Esys_HierarchyChangeAuth(esys_context, ESYS_TR_RH_PLATFORM, ESYS_TR_PASSWORD, ESYS_TR_NONE,
                                 ESYS_TR_NONE, &auth);

    if (number_rc(r) == TPM2_RC_BAD_AUTH || number_rc(r) == TPM2_RC_HIERARCHY) {
        /* Platform authorization not possible test will be skipped */
        LOG_WARNING("Platform authorization not possible.");
        failure_return = EXIT_SKIP;
        goto error;
    }
    goto_if_error(r, "Error: During Esys_ObjectChangeAuth", error);

    Esys_TR_SetAuth(esys_context, ESYS_TR_RH_PLATFORM, &auth);

    LOG_DEBUG("Clear");
    r = Esys_Clear(esys_context, ESYS_TR_RH_PLATFORM, session, ESYS_TR_NONE, ESYS_TR_NONE);
    goto_if_error(r, "Error: During Esys_Clear", error);

    r = Esys_FlushContext(esys_context, session);
    goto_if_error(r, "Error: During Esys_FlushContext", error);

    Esys_TR_SetAuth(esys_context, ESYS_TR_RH_PLATFORM, &auth);

    LOG_DEBUG("Set Auth");
    r = Esys_HierarchyChangeAuth(esys_context, ESYS_TR_RH_PLATFORM, ESYS_TR_PASSWORD, ESYS_TR_NONE,
                                 ESYS_TR_NONE, NULL);

    goto_if_error(r, "Error: During Esys_ObjectChangeAuth", error);

    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.");
        }
    }
    return failure_return;
}

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