/* 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_TPM2B_DIGEST_Marshal, Tss2_MU_T...
#include "tss2_sys.h"        // for TSS2_SYS_CONTEXT, TSS2L_SYS_AUTH_COMMAND
#include "tss2_tpm2_types.h" // for TPM2B_DIGEST, TPMI_DH_OBJECT, TPMT_SIGN...

TSS2_RC
Tss2_Sys_Sign_Prepare(TSS2_SYS_CONTEXT        *sysContext,
                      TPMI_DH_OBJECT           keyHandle,
                      const TPM2B_DIGEST      *digest,
                      const TPMT_SIG_SCHEME   *inScheme,
                      const TPMT_TK_HASHCHECK *validation) {
    TSS2_SYS_CONTEXT_BLOB *ctx = syscontext_cast(sysContext);
    TSS2_RC                rval;

    if (!ctx || !inScheme || !validation)
        return TSS2_SYS_RC_BAD_REFERENCE;

    rval = CommonPreparePrologue(ctx, TPM2_CC_Sign);
    if (rval)
        return rval;

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

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

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

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

    if (rval)
        return rval;

    rval = Tss2_MU_TPMT_SIG_SCHEME_Marshal(inScheme, ctx->cmdBuffer, ctx->maxCmdSize,
                                           &ctx->nextData);
    if (rval)
        return rval;

    rval = Tss2_MU_TPMT_TK_HASHCHECK_Marshal(validation, ctx->cmdBuffer, ctx->maxCmdSize,
                                             &ctx->nextData);
    if (rval)
        return rval;

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

    return CommonPrepareEpilogue(ctx);
}

TSS2_RC
Tss2_Sys_Sign_Complete(TSS2_SYS_CONTEXT *sysContext, TPMT_SIGNATURE *signature) {
    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;

    return Tss2_MU_TPMT_SIGNATURE_Unmarshal(ctx->cmdBuffer, ctx->maxCmdSize, &ctx->nextData,
                                            signature);
}

TSS2_RC
Tss2_Sys_Sign(TSS2_SYS_CONTEXT             *sysContext,
              TPMI_DH_OBJECT                keyHandle,
              TSS2L_SYS_AUTH_COMMAND const *cmdAuthsArray,
              const TPM2B_DIGEST           *digest,
              const TPMT_SIG_SCHEME        *inScheme,
              const TPMT_TK_HASHCHECK      *validation,
              TPMT_SIGNATURE               *signature,
              TSS2L_SYS_AUTH_RESPONSE      *rspAuthsArray) {
    TSS2_SYS_CONTEXT_BLOB *ctx = syscontext_cast(sysContext);
    TSS2_RC                rval;

    if (!inScheme || !validation)
        return TSS2_SYS_RC_BAD_REFERENCE;

    rval = Tss2_Sys_Sign_Prepare(sysContext, keyHandle, digest, inScheme, validation);
    if (rval)
        return rval;

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

    return Tss2_Sys_Sign_Complete(sysContext, signature);
}
