src/tss2-sys/api/Tss2_Sys_PolicySigned.c

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

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include "tss2_tpm2_types.h"
#include "tss2_mu.h"
#include "sysapi_util.h"

TSS2_RC Tss2_Sys_PolicySigned_Prepare(
    TSS2_SYS_CONTEXT *sysContext,
    TPMI_DH_OBJECT authObject,
    TPMI_SH_POLICY policySession,
    const TPM2B_NONCE *nonceTPM,
    const TPM2B_DIGEST *cpHashA,
    const TPM2B_NONCE *policyRef,
    INT32 expiration,
    const TPMT_SIGNATURE *auth)
{
    _TSS2_SYS_CONTEXT_BLOB *ctx = syscontext_cast(sysContext);
    TSS2_RC rval;

    if (!ctx || !auth)
        return TSS2_SYS_RC_BAD_REFERENCE;

    rval = CommonPreparePrologue(ctx, TPM2_CC_PolicySigned);
    if (rval)
        return rval;

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

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

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

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

        rval = Tss2_MU_TPM2B_NONCE_Marshal(nonceTPM, ctx->cmdBuffer,
                                           ctx->maxCmdSize,
                                           &ctx->nextData);
    }

    if (rval)
        return rval;

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

    } else {

        rval = Tss2_MU_TPM2B_DIGEST_Marshal(cpHashA, ctx->cmdBuffer,
                                            ctx->maxCmdSize,
                                            &ctx->nextData);
    }

    if (rval)
        return rval;

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

    } else {

        rval = Tss2_MU_TPM2B_NONCE_Marshal(policyRef, ctx->cmdBuffer,
                                           ctx->maxCmdSize,
                                           &ctx->nextData);
    }

    if (rval)
        return rval;

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

    rval = Tss2_MU_TPMT_SIGNATURE_Marshal(auth, 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_PolicySigned_Complete(
    TSS2_SYS_CONTEXT *sysContext,
    TPM2B_TIMEOUT *timeout,
    TPMT_TK_AUTH *policyTicket)
{
    _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_TIMEOUT_Unmarshal(ctx->cmdBuffer,
                                           ctx->maxCmdSize,
                                           &ctx->nextData, timeout);
    if (rval)
        return rval;

    return Tss2_MU_TPMT_TK_AUTH_Unmarshal(ctx->cmdBuffer,
                                          ctx->maxCmdSize,
                                          &ctx->nextData, policyTicket);
}

TSS2_RC Tss2_Sys_PolicySigned(
    TSS2_SYS_CONTEXT *sysContext,
    TPMI_DH_OBJECT authObject,
    TPMI_SH_POLICY policySession,
    TSS2L_SYS_AUTH_COMMAND const *cmdAuthsArray,
    const TPM2B_NONCE *nonceTPM,
    const TPM2B_DIGEST *cpHashA,
    const TPM2B_NONCE *policyRef,
    INT32 expiration,
    const TPMT_SIGNATURE *auth,
    TPM2B_TIMEOUT *timeout,
    TPMT_TK_AUTH *policyTicket,
    TSS2L_SYS_AUTH_RESPONSE *rspAuthsArray)
{
    _TSS2_SYS_CONTEXT_BLOB *ctx = syscontext_cast(sysContext);
    TSS2_RC rval;

    if (!auth)
        return TSS2_SYS_RC_BAD_REFERENCE;

    rval = Tss2_Sys_PolicySigned_Prepare(sysContext, authObject, policySession, nonceTPM, cpHashA, policyRef, expiration, auth);
    if (rval)
        return rval;

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

    return Tss2_Sys_PolicySigned_Complete(sysContext, timeout, policyTicket);
}