/* 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 "test-esys.h"       // for EXIT_SKIP, test_invoke_esys
#include "tss2_common.h"     // for TSS2_RC_SUCCESS, TSS2_RC, UINT16
#include "tss2_esys.h"       // for Esys_Free, ESYS_TR_NONE, Esys_FlushContext
#include "tss2_tpm2_types.h" // for TPM2B_ECC_POINT, TPM2B_PUBLIC, TPM2_ALG...

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

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

int
test_esys_commit(ESYS_CONTEXT *esys_context) {
    TSS2_RC r;
    ESYS_TR eccHandle = ESYS_TR_NONE;
    ESYS_TR session = ESYS_TR_NONE;
    int     failure_return = EXIT_FAILURE;

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

    TPM2B_ECC_POINT *K = NULL;
    TPM2B_ECC_POINT *L = NULL;
    TPM2B_ECC_POINT *E = NULL;

    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 } };

    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_SIGN_ENCRYPT |
                                 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_ECDAA,
                      .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);

    if (base_rc(r) == (TPM2_RC_SCHEME | TPM2_RC_P | TPM2_RC_2)) {
        LOG_WARNING("Scheme ECDAA not supported by TPM.");
        failure_return = EXIT_SKIP;
        goto error;
    }

    goto_if_error(r, "Error esys create primary", error);

    TPM2B_ECC_POINT      P1 = { 0 };
    TPM2B_SENSITIVE_DATA s2 = { 0 };
    TPM2B_ECC_PARAMETER  y2 = { 0 };
    UINT16               counter;
    r = Esys_Commit(esys_context, eccHandle, session, ESYS_TR_NONE, ESYS_TR_NONE, &P1, &s2, &y2, &K,
                    &L, &E, &counter);
    goto_if_error(r, "Error: Commit", error);

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

    eccHandle = ESYS_TR_NONE;

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

    session = ESYS_TR_NONE;

    Esys_Free(outPublic);
    Esys_Free(creationData);
    Esys_Free(creationHash);
    Esys_Free(creationTicket);
    Esys_Free(K);
    Esys_Free(L);
    Esys_Free(E);
    return EXIT_SUCCESS;

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

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

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

    Esys_Free(outPublic);
    Esys_Free(creationData);
    Esys_Free(creationHash);
    Esys_Free(creationTicket);
    Esys_Free(K);
    Esys_Free(L);
    Esys_Free(E);
    return failure_return;
}

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