/* 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 memcmp

#include "test-esys.h"       // for EXIT_SKIP, test_invoke_esys
#include "tss2_common.h"     // for BYTE, TSS2_RC_SUCCESS, TSS2_RESMGR_RC_L...
#include "tss2_esys.h"       // for Esys_Free, ESYS_TR_NONE, Esys_FlushContext
#include "tss2_tpm2_types.h" // for TPM2B_MAX_BUFFER, TPM2_RC_COMMAND_CODE

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

/** This test is intended to test the ESYS function Esys_EncryptDecrypt.
 *
 * First a primary key is generated. This key will be uses as parent fo a
 * symmetric key, which will be used to encrypt and decrypt a tpm2b. The
 * result will be compared.
 *
 * Tested ESYS commands:
 *  - Esys_Create() (M)
 *  - Esys_CreatePrimary() (M)
 *  - Esys_EncryptDecrypt() (O)
 *  - Esys_FlushContext() (M)
 *  - Esys_Load() (M)
 *
 * @param[in,out] esys_context The ESYS_CONTEXT.
 * @retval EXIT_FAILURE
 * @retval EXIT_SKIP
 * @retval EXIT_SUCCESS
 */

int
test_esys_encrypt_decrypt(ESYS_CONTEXT *esys_context) {
    TSS2_RC r;
    ESYS_TR primaryHandle = ESYS_TR_NONE;
    ESYS_TR loadedKeyHandle = 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_MAX_BUFFER    *outData = NULL;
    TPM2B_IV            *ivOut = NULL;

    TPM2B_PUBLIC        *outPublic2 = NULL;
    TPM2B_PRIVATE       *outPrivate2 = NULL;
    TPM2B_CREATION_DATA *creationData2 = NULL;
    TPM2B_DIGEST        *creationHash2 = NULL;
    TPMT_TK_CREATION    *creationTicket2 = NULL;
    TPM2B_MAX_BUFFER    *outData2 = NULL;
    TPM2B_IV            *ivOut2 = NULL;

    TPM2B_AUTH authValuePrimary = { .size = 5, .buffer = { 1, 2, 3, 4, 5 } };

    TPM2B_SENSITIVE_CREATE inSensitivePrimary = {
        .size = 0,
        .sensitive = {
            .userAuth = {
                 .size = 0,
                 .buffer = {0 },
             },
            .data = {
                 .size = 0,
                 .buffer = {0},
             },
        },
    };

    inSensitivePrimary.sensitive.userAuth = authValuePrimary;

    TPM2B_PUBLIC inPublic = {
        .size = 0,
        .publicArea = {
            .type = TPM2_ALG_RSA,
            .nameAlg = TPM2_ALG_SHA256,
            .objectAttributes = (TPMA_OBJECT_USERWITHAUTH |
                                 TPMA_OBJECT_RESTRICTED |
                                 TPMA_OBJECT_DECRYPT |
                                 TPMA_OBJECT_FIXEDTPM |
                                 TPMA_OBJECT_FIXEDPARENT |
                                 TPMA_OBJECT_SENSITIVEDATAORIGIN),
            .authPolicy = {
                 .size = 0,
             },
            .parameters.rsaDetail = {
                 .symmetric = {
                     .algorithm = TPM2_ALG_AES,
                     .keyBits.aes = 128,
                     .mode.aes = TPM2_ALG_CFB},
                 .scheme = {
                      .scheme = TPM2_ALG_NULL
                  },
                 .keyBits = 2048,
                 .exponent = 0,
             },
            .unique.rsa = {
                 .size = 0,
                 .buffer = {},
             },
        },
    };

    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, ESYS_TR_PASSWORD, ESYS_TR_NONE,
                           ESYS_TR_NONE, &inSensitivePrimary, &inPublic, &outsideInfo, &creationPCR,
                           &primaryHandle, &outPublic, &creationData, &creationHash,
                           &creationTicket);
    goto_if_error(r, "Error esys create primary", error);

    r = Esys_TR_SetAuth(esys_context, primaryHandle, &authValuePrimary);
    goto_if_error(r, "Error: TR_SetAuth", error);

    TPM2B_AUTH authKey2 = { .size = 6, .buffer = { 6, 7, 8, 9, 10, 11 } };

    TPM2B_SENSITIVE_CREATE inSensitive2
        = { .size = 0,
            .sensitive
            = { .userAuth = { .size = 0, .buffer = { 0 } },
                .data = { .size = 16, .buffer = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 16 } } } };

    inSensitive2.sensitive.userAuth = authKey2;

    TPM2B_PUBLIC inPublic2 = {
        .size = 0,
        .publicArea = {
            .type = TPM2_ALG_SYMCIPHER,
            .nameAlg = TPM2_ALG_SHA256,
            .objectAttributes = (TPMA_OBJECT_USERWITHAUTH |
                                 TPMA_OBJECT_SIGN_ENCRYPT |
                                 TPMA_OBJECT_DECRYPT),

            .authPolicy = {
                 .size = 0,
             },
            .parameters.symDetail = {
                 .sym = {
                     .algorithm = TPM2_ALG_AES,
                     .keyBits = {.aes = 128},
                     .mode = {.aes = TPM2_ALG_CFB}}
             },
            .unique.sym = {
                 .size = 0,
                 .buffer = {}
             }
        }
    };

    TPM2B_DATA outsideInfo2 = {
        .size = 0,
        .buffer = {},
    };

    TPML_PCR_SELECTION creationPCR2 = {
        .count = 0,
    };

    r = Esys_Create(esys_context, primaryHandle, ESYS_TR_PASSWORD, ESYS_TR_NONE, ESYS_TR_NONE,
                    &inSensitive2, &inPublic2, &outsideInfo2, &creationPCR2, &outPrivate2,
                    &outPublic2, &creationData2, &creationHash2, &creationTicket2);

    if (r == 0x2c2) { /*<< tpm:parameter(2):inconsistent attributes */
        LOG_WARNING("Unsupported symmetric cipher.");
        failure_return = EXIT_SKIP;
        goto error;
    }
    goto_if_error(r, "Error esys create ", error);

    LOG_INFO("AES key created.");

    r = Esys_Load(esys_context, primaryHandle, ESYS_TR_PASSWORD, ESYS_TR_NONE, ESYS_TR_NONE,
                  outPrivate2, outPublic2, &loadedKeyHandle);
    goto_if_error(r, "Error esys load ", error);

    LOG_INFO("AES key loaded.");

    r = Esys_TR_SetAuth(esys_context, loadedKeyHandle, &authKey2);
    goto_if_error(r, "Error esys TR_SetAuth ", error);

    ESYS_TR              keyHandle_handle = loadedKeyHandle;
    TPMI_YES_NO          decrypt = TPM2_YES;
    TPMI_YES_NO          encrypt = TPM2_NO;
    TPMI_ALG_CIPHER_MODE mode = TPM2_ALG_NULL;
    TPM2B_IV         ivIn = { .size = 16, .buffer = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 16 } };
    TPM2B_MAX_BUFFER inData
        = { .size = 16, .buffer = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 16 } };

#ifdef TEST_ENCRYPT_DECRYPT2
    LOG_INFO("Test Esys_EncryptDecrypt2");
    r = Esys_EncryptDecrypt2(esys_context, keyHandle_handle, ESYS_TR_PASSWORD, ESYS_TR_NONE,
                             ESYS_TR_NONE, &inData, encrypt, mode, &ivIn, &outData, &ivOut);
#else
    LOG_INFO("Test Esys_EncryptDecrypt");
    r = Esys_EncryptDecrypt(esys_context, keyHandle_handle, ESYS_TR_PASSWORD, ESYS_TR_NONE,
                            ESYS_TR_NONE, encrypt, mode, &ivIn, &inData, &outData, &ivOut);
#endif /* TEST_ENCRYPT_DECRYPT2 */

    if ((r == TPM2_RC_COMMAND_CODE) || (r == (TPM2_RC_COMMAND_CODE | TSS2_RESMGR_RC_LAYER))
        || (r == (TPM2_RC_COMMAND_CODE | TSS2_RESMGR_TPM_RC_LAYER))) {
        LOG_WARNING("Command TPM2_EncryptDecrypt not supported by TPM.");
        failure_return = EXIT_SKIP;
        goto error;
    }

    goto_if_error(r, "Error: EncryptDecrypt", error);

#ifdef TEST_ENCRYPT_DECRYPT2
    r = Esys_EncryptDecrypt2(esys_context, keyHandle_handle, ESYS_TR_PASSWORD, ESYS_TR_NONE,
                             ESYS_TR_NONE, outData, decrypt, mode, &ivIn, &outData2, &ivOut2);
#else
    r = Esys_EncryptDecrypt(esys_context, keyHandle_handle, ESYS_TR_PASSWORD, ESYS_TR_NONE,
                            ESYS_TR_NONE, decrypt, mode, &ivIn, outData, &outData2, &ivOut2);
#endif /* TEST_ENCRYPT_DECRYPT2 */

    if ((r == TPM2_RC_COMMAND_CODE) || (r == (TPM2_RC_COMMAND_CODE | TSS2_RESMGR_RC_LAYER))
        || (r == (TPM2_RC_COMMAND_CODE | TSS2_RESMGR_TPM_RC_LAYER))) {
        LOG_WARNING("Command TPM2_EncryptDecrypt not supported by TPM.");
        failure_return = EXIT_SKIP;
        goto error;
    }

    goto_if_error(r, "Error: EncryptDecrypt", error);

    LOGBLOB_DEBUG(&outData2->buffer[0], outData2->size, "** Decrypted data **");

    if (outData2->size != inData.size
        || memcmp(&outData2->buffer, &inData.buffer[0], outData2->size) != 0) {
        LOG_ERROR("Error: decrypted text not  equal to origin");
        goto error;
    }

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

    primaryHandle = ESYS_TR_NONE;

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

    Esys_Free(outPublic);
    Esys_Free(creationData);
    Esys_Free(creationHash);
    Esys_Free(creationTicket);
    Esys_Free(outData);
    Esys_Free(ivOut);

    Esys_Free(outPublic2);
    Esys_Free(outPrivate2);
    Esys_Free(creationData2);
    Esys_Free(creationHash2);
    Esys_Free(creationTicket2);
    Esys_Free(outData2);
    Esys_Free(ivOut2);
    return EXIT_SUCCESS;

error:

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

    if (loadedKeyHandle != ESYS_TR_NONE) {
        if (Esys_FlushContext(esys_context, loadedKeyHandle) != TSS2_RC_SUCCESS) {
            LOG_ERROR("Cleanup loadedKeyHandle failed.");
        }
    }
    Esys_Free(outPublic);
    Esys_Free(creationData);
    Esys_Free(creationHash);
    Esys_Free(creationTicket);
    Esys_Free(outData);
    Esys_Free(ivOut);

    Esys_Free(outPublic2);
    Esys_Free(outPrivate2);
    Esys_Free(creationData2);
    Esys_Free(creationHash2);
    Esys_Free(creationTicket2);
    Esys_Free(outData2);
    Esys_Free(ivOut2);
    return failure_return;
}

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