digsig.h

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/*
 * Copyright (C) 2011 Nokia Corporation
 * Copyright (C) 2011 Intel Corporation
 *
 * Author:
 * Dmitry Kasatkin <[email protected]>
 *                 <[email protected]>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, version 2 of the License.
 *
 */

#ifndef _DIGSIG_H
#define _DIGSIG_H

#include <linux/key.h>

enum pubkey_algo {
    PUBKEY_ALGO_RSA,
    PUBKEY_ALGO_MAX,
};

enum digest_algo {
    DIGEST_ALGO_SHA1,
    DIGEST_ALGO_SHA256,
    DIGEST_ALGO_MAX
};

struct pubkey_hdr {
    uint8_t     version;    /* key format version */
    uint32_t    timestamp;  /* key made, always 0 for now */
    uint8_t     algo;
    uint8_t     nmpi;
    char        mpi[0];
} __packed;

struct signature_hdr {
    uint8_t     version;    /* signature format version */
    uint32_t    timestamp;  /* signature made */
    uint8_t     algo;
    uint8_t     hash;
    uint8_t     keyid[8];
    uint8_t     nmpi;
    char        mpi[0];
} __packed;

#if defined(CONFIG_SIGNATURE) || defined(CONFIG_SIGNATURE_MODULE)

int digsig_verify(struct key *keyring, const char *sig, int siglen,
                    const char *digest, int digestlen);

#else

static inline int digsig_verify(struct key *keyring, const char *sig,
                int siglen, const char *digest, int digestlen)
{
    return -EOPNOTSUPP;
}

#endif /* CONFIG_SIGNATURE */

#endif /* _DIGSIG_H */