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

#include "test-esys.h"       // for EXIT_SKIP, test_invoke_esys
#include "tss2_common.h"     // for TSS2_RC
#include "tss2_esys.h"       // for Esys_Clear, ESYS_CONTEXT, ESYS_TR_NONE
#include "tss2_tpm2_types.h" // for TPM2_RC_BAD_AUTH

#define LOGMODULE test
#include "util/log.h" // for LOG_WARNING, goto_if_error, number_rc

/** Test of the ESYS function Esys_Clear.
 *
 * Tested ESYS commands:
 *  - Esys_Clear() (M)
 *  - Esys_FlushContext() (M)
 *  - Esys_StartAuthSession() (M)
 *
 * Used compiler defines: TEST_SESSION
 *
 * @param[in,out] esys_context The ESYS_CONTEXT.
 * @retval EXIT_FAILURE
 * @retval EXIT_SUCCESS
 */

int
test_esys_clear(ESYS_CONTEXT *esys_context) {
    TSS2_RC r;
    int     failure_return = EXIT_FAILURE;

#ifdef TEST_SESSION
    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, 21, 22,
                                                         23, 24, 25, 26, 27, 28, 29, 30, 31, 32 } };

    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);
#endif /* TEST_SESSION */

    ESYS_TR authHandle_handle = ESYS_TR_RH_PLATFORM;

    r = Esys_Clear(esys_context, authHandle_handle,
#ifdef TEST_SESSION
                   session,
#else
                   ESYS_TR_PASSWORD,
#endif
                   ESYS_TR_NONE, ESYS_TR_NONE);
    if (number_rc(r) == TPM2_RC_BAD_AUTH) {
        /* 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: Clear", error);

#ifdef TEST_SESSION
    r = Esys_FlushContext(esys_context, session);
    goto_if_error(r, "Error: FlushContext", error);
#endif

    return EXIT_SUCCESS;

error:

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

    return failure_return;
}

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