/home/dko/projects/mobilec/trunk/src/security/xyssl-0.7/include/xyssl/dhm.h

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#ifndef _DHM_H
#define _DHM_H

#ifdef __cplusplus
extern "C" {
#endif

#include "bignum.h"

#define ERR_DHM_BAD_INPUT_DATA                  0x0380
#define ERR_DHM_READ_PARAMS_FAILED              0x0390
#define ERR_DHM_MAKE_PARAMS_FAILED              0x03A0
#define ERR_DHM_READ_PUBLIC_FAILED              0x03B0
#define ERR_DHM_MAKE_PUBLIC_FAILED              0x03C0
#define ERR_DHM_CALC_SECRET_FAILED              0x03D0

typedef struct
{
    int len;    
    mpi P;      
    mpi G;      
    mpi X;      
    mpi GX;     
    mpi GY;     
    mpi K;      
    mpi RP;     
}
dhm_context;

int dhm_read_params( dhm_context *ctx,
                     unsigned char **p,
                     unsigned char *end );

int dhm_make_params( dhm_context *ctx,
                     int (*rng_f)(void *), void *rng_d,
                     unsigned char *output, int *olen );

int dhm_read_public( dhm_context *ctx,
                     unsigned char *input, int ilen );

int dhm_make_public( dhm_context *ctx,
                     unsigned char *output, int olen,
                     int (*rng_f)(void *), void *rng_d );

int dhm_calc_secret( dhm_context *ctx,
                     unsigned char *output, int *olen );

/*
 * \brief          Free the components of a DHM key
 */
void dhm_free( dhm_context *ctx );

int dhm_self_test( int verbose );

#ifdef __cplusplus
}
#endif

#endif

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