//**********************************************************************;
// Copyright (c) 2017, SUSE GmbH
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
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// 1. Redistributions of source code must retain the above copyright notice,
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// 2. Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
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#ifndef CONVERSION_H
#define CONVERSION_H

#include <stdbool.h>

#include <tss2/tss2_sys.h>

typedef enum tpm2_convert_pubkey_fmt tpm2_convert_pubkey_fmt;
enum tpm2_convert_pubkey_fmt {
    pubkey_format_tss,
    pubkey_format_pem,
    pubkey_format_der,
    pubkey_format_err
};

typedef enum tpm2_convert_sig_fmt tpm2_convert_sig_fmt;
enum tpm2_convert_sig_fmt {
    signature_format_tss,
    signature_format_plain,
    signature_format_err
};

/**
 * Parses the given command line public key format option string and returns
 * the corresponding pubkey_format enum value.
 *
 * LOG_ERR is used to communicate errors.
 *
 * @return
 *   On error pubkey_format_err is returned.
 */
tpm2_convert_pubkey_fmt tpm2_convert_pubkey_fmt_from_optarg(const char *label);

/**
 * Converts the given public key structure into the requested target format
 * and writes the result to the given file system path.
 *
 * LOG_ERR is used to communicate errors.
 */
bool tpm2_convert_pubkey_save(TPM2B_PUBLIC *public, tpm2_convert_pubkey_fmt format, const char *path);

/**
 * Loads a public key in the TSS format from a file.
 * @param public
 *  The public key to load
 * @param format
 * @param path
 * @return
 */
bool tpm2_convert_pubkey_load(TPM2B_PUBLIC *public, const char *path);

/**
 * Parses the given command line signature format option string and returns
 * the corresponding signature_format enum value.
 *
 * LOG_ERR is used to communicate errors.
 *
 * @return
 *   On error signature_format_err is returned.
 */
tpm2_convert_sig_fmt tpm2_convert_sig_fmt_from_optarg(const char *label);

/**
 * Converts the given signature data into the requested target format and
 * writes the result to the given file system path.
 *
 * LOG_ERR is used to communicate errors.
 */
bool tpm2_convert_sig(TPMT_SIGNATURE *signature, tpm2_convert_sig_fmt format,
        const char *path);

#endif /* CONVERSION_H */