/* 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, UINT16
#include "tss2_mu.h"         // for Tss2_MU_UINT16_Marshal, Tss2_MU_TPM2B_E...
#include "tss2_sys.h"        // for TSS2_SYS_CONTEXT, TSS2L_SYS_AUTH_COMMAND
#include "tss2_tpm2_types.h" // for TPM2B_ECC_POINT, TPMI_DH_OBJECT, TPMI_E...

TSS2_RC
Tss2_Sys_ZGen_2Phase_Prepare(TSS2_SYS_CONTEXT      *sysContext,
                             TPMI_DH_OBJECT         keyA,
                             const TPM2B_ECC_POINT *inQsB,
                             const TPM2B_ECC_POINT *inQeB,
                             TPMI_ECC_KEY_EXCHANGE  inScheme,
                             UINT16                 counter) {
    TSS2_SYS_CONTEXT_BLOB *ctx = syscontext_cast(sysContext);
    TSS2_RC                rval;

    if (!ctx)
        return TSS2_SYS_RC_BAD_REFERENCE;

    rval = CommonPreparePrologue(ctx, TPM2_CC_ZGen_2Phase);
    if (rval)
        return rval;

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

    if (!inQsB) {
        ctx->decryptNull = 1;

        rval = Tss2_MU_UINT16_Marshal(0, ctx->cmdBuffer, ctx->maxCmdSize, &ctx->nextData);
    } else {

        rval = Tss2_MU_TPM2B_ECC_POINT_Marshal(inQsB, ctx->cmdBuffer, ctx->maxCmdSize,
                                               &ctx->nextData);
    }

    if (rval)
        return rval;

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

    } else {

        rval = Tss2_MU_TPM2B_ECC_POINT_Marshal(inQeB, ctx->cmdBuffer, ctx->maxCmdSize,
                                               &ctx->nextData);
    }

    if (rval)
        return rval;

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

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

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

    return CommonPrepareEpilogue(ctx);
}

TSS2_RC
Tss2_Sys_ZGen_2Phase_Complete(TSS2_SYS_CONTEXT *sysContext,
                              TPM2B_ECC_POINT  *outZ1,
                              TPM2B_ECC_POINT  *outZ2) {
    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_ECC_POINT_Unmarshal(ctx->cmdBuffer, ctx->maxCmdSize, &ctx->nextData, outZ1);
    if (rval)
        return rval;

    return Tss2_MU_TPM2B_ECC_POINT_Unmarshal(ctx->cmdBuffer, ctx->maxCmdSize, &ctx->nextData,
                                             outZ2);
}

TSS2_RC
Tss2_Sys_ZGen_2Phase(TSS2_SYS_CONTEXT             *sysContext,
                     TPMI_DH_OBJECT                keyA,
                     TSS2L_SYS_AUTH_COMMAND const *cmdAuthsArray,
                     const TPM2B_ECC_POINT        *inQsB,
                     const TPM2B_ECC_POINT        *inQeB,
                     TPMI_ECC_KEY_EXCHANGE         inScheme,
                     UINT16                        counter,
                     TPM2B_ECC_POINT              *outZ1,
                     TPM2B_ECC_POINT              *outZ2,
                     TSS2L_SYS_AUTH_RESPONSE      *rspAuthsArray) {
    TSS2_SYS_CONTEXT_BLOB *ctx = syscontext_cast(sysContext);
    TSS2_RC                rval;

    rval = Tss2_Sys_ZGen_2Phase_Prepare(sysContext, keyA, inQsB, inQeB, inScheme, counter);
    if (rval)
        return rval;

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

    return Tss2_Sys_ZGen_2Phase_Complete(sysContext, outZ1, outZ2);
}
