/* 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 free, NULL, EXIT_FAILURE, EXIT_SUCCESS

#include "tss2_common.h"     // for BYTE, TSS2_RC
#include "tss2_esys.h"       // for ESYS_TR_NONE, Esys_GetRandom, Esys_Star...
#include "tss2_tpm2_types.h" // for TPM2B_DIGEST, TPM2_RC_SUCCESS, TPMA_SES...

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

/** Test the ESYS function Esys_GetRandom.
 *
 * Tested ESYS commands:
 *  - Esys_GetRandom() (M)
 *  - Esys_StartAuthSession() (M)
 *
 * @param[in,out] esys_context The ESYS_CONTEXT.
 * @retval EXIT_FAILURE
 * @retval EXIT_SUCCESS
 */
int
test_esys_get_random(ESYS_CONTEXT *esys_context) {

    TSS2_RC r;

    TPM2B_DIGEST *randomBytes;
    r = Esys_GetRandom(esys_context, ESYS_TR_NONE, ESYS_TR_NONE, ESYS_TR_NONE, 48, &randomBytes);
    if (r != TPM2_RC_SUCCESS) {
        LOG_ERROR("GetRandom FAILED! Response Code : 0x%x", r);
        goto error;
    }

    LOGBLOB_DEBUG(&randomBytes->buffer[0], randomBytes->size,
                  "Randoms (count=%i):", randomBytes->size);
    Esys_Free(randomBytes);

    LOG_INFO("GetRandom Test Passed!");

    ESYS_TR            session = ESYS_TR_NONE;
    const TPMT_SYM_DEF symmetric
        = { .algorithm = TPM2_ALG_AES, .keyBits = { .aes = 128 }, .mode = { .aes = TPM2_ALG_CFB } };

    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);
    if (r != TPM2_RC_SUCCESS) {
        LOG_ERROR("Esys_StartAuthSession FAILED! Response Code : 0x%x", r);
        goto error;
    }

    r = Esys_TRSess_SetAttributes(esys_context, session, TPMA_SESSION_AUDIT,
                                  TPMA_SESSION_CONTINUESESSION | TPMA_SESSION_AUDIT);
    if (r != TPM2_RC_SUCCESS) {
        LOG_ERROR("SetAttributes on session FAILED! Response Code : 0x%x", r);
        goto error_cleansession;
    }

    r = Esys_GetRandom(esys_context, session, ESYS_TR_NONE, ESYS_TR_NONE, 48, &randomBytes);
    if (r != TPM2_RC_SUCCESS) {
        LOG_ERROR("GetRandom with session FAILED! Response Code : 0x%x", r);
        goto error_cleansession;
    }

    LOGBLOB_DEBUG(&randomBytes->buffer[0], randomBytes->size,
                  "Randoms (count=%i):", randomBytes->size);
    free(randomBytes);

    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);
    if (r != TPM2_RC_SUCCESS) {
        LOG_ERROR("Esys_StartAuthSession FAILED! Response Code : 0x%x", r);
        goto error;
    }

    r = Esys_TRSess_SetAttributes(esys_context, session, TPMA_SESSION_AUDIT,
                                  TPMA_SESSION_CONTINUESESSION | TPMA_SESSION_AUDIT);
    if (r != TPM2_RC_SUCCESS) {
        LOG_ERROR("SetAttributes on session FAILED! Response Code : 0x%x", r);
        goto error_cleansession;
    }

    r = Esys_GetRandom(esys_context, session, ESYS_TR_NONE, ESYS_TR_NONE, 48, &randomBytes);
    if (r != TPM2_RC_SUCCESS) {
        LOG_ERROR("GetRandom with session FAILED! Response Code : 0x%x", r);
        goto error_cleansession;
    }

    LOGBLOB_DEBUG(&randomBytes->buffer[0], randomBytes->size,
                  "Randoms (count=%i):", randomBytes->size);
    free(randomBytes);

    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);
    if (r != TPM2_RC_SUCCESS) {
        LOG_ERROR("Esys_StartAuthSession FAILED! Response Code : 0x%x", r);
        goto error;
    }

    r = Esys_TRSess_SetAttributes(esys_context, session, TPMA_SESSION_AUDIT,
                                  TPMA_SESSION_CONTINUESESSION | TPMA_SESSION_AUDIT);
    if (r != TPM2_RC_SUCCESS) {
        LOG_ERROR("SetAttributes on session FAILED! Response Code : 0x%x", r);
        goto error_cleansession;
    }

    r = Esys_GetRandom(esys_context, session, ESYS_TR_NONE, ESYS_TR_NONE, 48, &randomBytes);
    if (r != TPM2_RC_SUCCESS) {
        LOG_ERROR("GetRandom with session FAILED! Response Code : 0x%x", r);
        goto error_cleansession;
    }

    LOGBLOB_DEBUG(&randomBytes->buffer[0], randomBytes->size,
                  "Randoms (count=%i):", randomBytes->size);
    free(randomBytes);

    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);
    if (r != TPM2_RC_SUCCESS) {
        LOG_ERROR("Esys_StartAuthSession FAILED! Response Code : 0x%x", r);
        goto error;
    }

    r = Esys_TRSess_SetAttributes(esys_context, session, TPMA_SESSION_AUDIT,
                                  TPMA_SESSION_CONTINUESESSION | TPMA_SESSION_AUDIT);
    if (r != TPM2_RC_SUCCESS) {
        LOG_ERROR("SetAttributes on session FAILED! Response Code : 0x%x", r);
        goto error_cleansession;
    }

    r = Esys_GetRandom(esys_context, session, ESYS_TR_NONE, ESYS_TR_NONE, 48, &randomBytes);
    if (r != TPM2_RC_SUCCESS) {
        LOG_ERROR("GetRandom with session FAILED! Response Code : 0x%x", r);
        goto error_cleansession;
    }

    LOGBLOB_DEBUG(&randomBytes->buffer[0], randomBytes->size,
                  "Randoms (count=%i):", randomBytes->size);
    free(randomBytes);

    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);
    if (r != TPM2_RC_SUCCESS) {
        LOG_ERROR("Esys_StartAuthSession FAILED! Response Code : 0x%x", r);
        goto error;
    }

    r = Esys_TRSess_SetAttributes(esys_context, session, TPMA_SESSION_AUDIT,
                                  TPMA_SESSION_CONTINUESESSION | TPMA_SESSION_AUDIT);
    if (r != TPM2_RC_SUCCESS) {
        LOG_ERROR("SetAttributes on session FAILED! Response Code : 0x%x", r);
        goto error_cleansession;
    }

    r = Esys_GetRandom(esys_context, session, ESYS_TR_NONE, ESYS_TR_NONE, 48, &randomBytes);
    if (r != TPM2_RC_SUCCESS) {
        LOG_ERROR("GetRandom with session FAILED! Response Code : 0x%x", r);
        goto error_cleansession;
    }

    LOGBLOB_DEBUG(&randomBytes->buffer[0], randomBytes->size,
                  "Randoms (count=%i):", randomBytes->size);
    free(randomBytes);

    LOG_INFO("GetRandom with session Test Passed!");

    // r = Esys_FlushContext(esys_context, session);
    if (r != TPM2_RC_SUCCESS) {
        LOG_ERROR("FlushContext with session FAILED! Response Code : 0x%x", r);
        goto error_cleansession;
    }

    return EXIT_SUCCESS;

error_cleansession:
    r = Esys_FlushContext(esys_context, session);
    if (r != TPM2_RC_SUCCESS) {
        LOG_ERROR("FlushContext FAILED! Response Code : 0x%x", r);
    }
error:
    return EXIT_FAILURE;
}

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