#ifndef _RPMDIGEST_H

#define _RPMDIGEST_H

#include <rpm/rpmpgp.h>

typedef struct pgpDigAlg_s * pgpDigAlg;

typedef int (*setmpifunc)(pgpDigAlg digp, int num, const uint8_t *p);

typedef int (*verifyfunc)(pgpDigAlg pgpkey, pgpDigAlg pgpsig,

                          uint8_t *hash, size_t hashlen, int hash_algo);

typedef void (*freefunc)(pgpDigAlg digp);

struct pgpDigAlg_s {

    setmpifunc setmpi;

    verifyfunc verify;

    freefunc free;

    int mpis;

    void *data;			/*!< algorithm specific private data */

};

/** \ingroup rpmio

 * Values parsed from OpenPGP signature/pubkey packet(s).

 */

struct pgpDigParams_s {

    char * userid;

    uint8_t * hash;

    uint8_t tag;

    uint8_t version;		/*!< version number. */

    uint32_t time;		/*!< key/signature creation time. */

    uint8_t pubkey_algo;		/*!< public key algorithm. */

    uint8_t hash_algo;

    uint8_t sigtype;

    uint8_t hashlen;

    uint8_t signhash16[2];

    pgpKeyID_t signid;

    uint8_t saved;

#define	PGPDIG_SAVED_TIME	(1 << 0)

#define	PGPDIG_SAVED_ID		(1 << 1)

    pgpDigAlg alg;

};

pgpDigAlg pgpPubkeyNew(int algo);

pgpDigAlg pgpSignatureNew(int algo);

pgpDigAlg pgpDigAlgFree(pgpDigAlg da);

/** \ingroup rpmpgp

 * Return no. of bits in a multiprecision integer.

 * @param p		pointer to multiprecision integer

 * @return		no. of bits

 */

static inline

unsigned int pgpMpiBits(const uint8_t *p)

{

    return ((p[0] << 8) | p[1]);

}

/** \ingroup rpmpgp

 * Return no. of bytes in a multiprecision integer.

 * @param p		pointer to multiprecision integer

 * @return		no. of bytes

 */

static inline

size_t pgpMpiLen(const uint8_t *p)

{

    return (2 + ((pgpMpiBits(p)+7)>>3));

}

#endif /* _RPMDIGEST_H */