/* SPDX-License-Identifier: BSD-2-Clause */
/***********************************************************************;
 * Copyright (c) 2015 - 2017, Intel Corporation
 * All rights reserved.
 ***********************************************************************/

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

#include "sysapi_util.h"     // for _TSS2_SYS_CONTEXT_BLOB, syscontext_cast
#include "tss2_common.h"     // for TSS2_RC, TSS2_SYS_RC_BAD_REFERENCE
#include "tss2_mu.h"         // for Tss2_MU_UINT16_Marshal, Tss2_MU_TPM2B_I...
#include "tss2_sys.h"        // for TSS2_SYS_CONTEXT, TSS2L_SYS_AUTH_COMMAND
#include "tss2_tpm2_types.h" // for TPM2B_IV, TPM2B_MAX_BUFFER, TPMI_ALG_CI...

TSS2_RC
Tss2_Sys_EncryptDecrypt_Prepare(TSS2_SYS_CONTEXT       *sysContext,
                                TPMI_DH_OBJECT          keyHandle,
                                TPMI_YES_NO             decrypt,
                                TPMI_ALG_CIPHER_MODE    mode,
                                const TPM2B_IV         *ivIn,
                                const TPM2B_MAX_BUFFER *inData) {
    TSS2_SYS_CONTEXT_BLOB *ctx = syscontext_cast(sysContext);
    TSS2_RC                rval;

    if (!ctx)
        return TSS2_SYS_RC_BAD_REFERENCE;

    rval = CommonPreparePrologue(ctx, TPM2_CC_EncryptDecrypt);
    if (rval)
        return rval;

    rval = Tss2_MU_UINT32_Marshal(keyHandle, ctx->cmdBuffer, ctx->maxCmdSize, &ctx->nextData);
    if (rval)
        return rval;

    rval = Tss2_MU_UINT8_Marshal(decrypt, ctx->cmdBuffer, ctx->maxCmdSize, &ctx->nextData);
    if (rval)
        return rval;

    rval = Tss2_MU_UINT16_Marshal(mode, ctx->cmdBuffer, ctx->maxCmdSize, &ctx->nextData);
    if (rval)
        return rval;

    if (!ivIn) {
        rval = Tss2_MU_UINT16_Marshal(0, ctx->cmdBuffer, ctx->maxCmdSize, &ctx->nextData);

    } else {

        rval = Tss2_MU_TPM2B_IV_Marshal(ivIn, ctx->cmdBuffer, ctx->maxCmdSize, &ctx->nextData);
    }

    if (rval)
        return rval;

    if (!inData) {
        rval = Tss2_MU_UINT16_Marshal(0, ctx->cmdBuffer, ctx->maxCmdSize, &ctx->nextData);

    } else {

        rval = Tss2_MU_TPM2B_MAX_BUFFER_Marshal(inData, ctx->cmdBuffer, ctx->maxCmdSize,
                                                &ctx->nextData);
    }

    if (rval)
        return rval;

    ctx->decryptAllowed = 0;
    ctx->encryptAllowed = 1;
    ctx->authAllowed = 1;

    return CommonPrepareEpilogue(ctx);
}

TSS2_RC
Tss2_Sys_EncryptDecrypt_Complete(TSS2_SYS_CONTEXT *sysContext,
                                 TPM2B_MAX_BUFFER *outData,
                                 TPM2B_IV         *ivOut) {
    TSS2_SYS_CONTEXT_BLOB *ctx = syscontext_cast(sysContext);
    TSS2_RC                rval;

    if (!ctx)
        return TSS2_SYS_RC_BAD_REFERENCE;

    rval = CommonComplete(ctx);
    if (rval)
        return rval;

    rval = Tss2_MU_TPM2B_MAX_BUFFER_Unmarshal(ctx->cmdBuffer, ctx->maxCmdSize, &ctx->nextData,
                                              outData);
    if (rval)
        return rval;

    return Tss2_MU_TPM2B_IV_Unmarshal(ctx->cmdBuffer, ctx->maxCmdSize, &ctx->nextData, ivOut);
}

TSS2_RC
Tss2_Sys_EncryptDecrypt(TSS2_SYS_CONTEXT             *sysContext,
                        TPMI_DH_OBJECT                keyHandle,
                        TSS2L_SYS_AUTH_COMMAND const *cmdAuthsArray,
                        TPMI_YES_NO                   decrypt,
                        TPMI_ALG_CIPHER_MODE          mode,
                        const TPM2B_IV               *ivIn,
                        const TPM2B_MAX_BUFFER       *inData,
                        TPM2B_MAX_BUFFER             *outData,
                        TPM2B_IV                     *ivOut,
                        TSS2L_SYS_AUTH_RESPONSE      *rspAuthsArray) {
    TSS2_SYS_CONTEXT_BLOB *ctx = syscontext_cast(sysContext);
    TSS2_RC                rval;

    rval = Tss2_Sys_EncryptDecrypt_Prepare(sysContext, keyHandle, decrypt, mode, ivIn, inData);
    if (rval)
        return rval;

    rval = CommonOneCall(ctx, cmdAuthsArray, rspAuthsArray);
    if (rval)
        return rval;

    return Tss2_Sys_EncryptDecrypt_Complete(sysContext, outData, ivOut);
}
