dhm.h File Reference


Detailed Description

Copyright (C) 2006-2009, Paul Bakker <polarssl_maintainer at polarssl.org> All rights reserved.

Joined copyright on original XySSL code with: Christophe Devine

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; either version 2 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

Definition in file dhm.h.

#include "polarssl/bignum.h"

Go to the source code of this file.

Data Structures

struct  dhm_context

Defines

#define POLARSSL_ERR_DHM_BAD_INPUT_DATA   0x0480
#define POLARSSL_ERR_DHM_CALC_SECRET_FAILED   0x04D0
#define POLARSSL_ERR_DHM_MAKE_PARAMS_FAILED   0x04A0
#define POLARSSL_ERR_DHM_MAKE_PUBLIC_FAILED   0x04C0
#define POLARSSL_ERR_DHM_READ_PARAMS_FAILED   0x0490
#define POLARSSL_ERR_DHM_READ_PUBLIC_FAILED   0x04B0

Functions

int dhm_calc_secret (dhm_context *ctx, unsigned char *output, int *olen)
 Derive and export the shared secret (G^Y)^X mod P.
void dhm_free (dhm_context *ctx)
int dhm_make_params (dhm_context *ctx, int s_size, unsigned char *output, int *olen, int(*f_rng)(void *), void *p_rng)
 Setup and write the ServerKeyExchange parameters.
int dhm_make_public (dhm_context *ctx, int s_size, unsigned char *output, int olen, int(*f_rng)(void *), void *p_rng)
 Create own private value X and export G^X.
int dhm_read_params (dhm_context *ctx, unsigned char **p, unsigned char *end)
 Parse the ServerKeyExchange parameters.
int dhm_read_public (dhm_context *ctx, unsigned char *input, int ilen)
 Import the peer's public value G^Y.
int dhm_self_test (int verbose)
 Checkup routine.


Define Documentation

#define POLARSSL_ERR_DHM_BAD_INPUT_DATA   0x0480

Definition at line 28 of file dhm.h.

#define POLARSSL_ERR_DHM_CALC_SECRET_FAILED   0x04D0

Definition at line 33 of file dhm.h.

#define POLARSSL_ERR_DHM_MAKE_PARAMS_FAILED   0x04A0

Definition at line 30 of file dhm.h.

#define POLARSSL_ERR_DHM_MAKE_PUBLIC_FAILED   0x04C0

Definition at line 32 of file dhm.h.

#define POLARSSL_ERR_DHM_READ_PARAMS_FAILED   0x0490

Definition at line 29 of file dhm.h.

#define POLARSSL_ERR_DHM_READ_PUBLIC_FAILED   0x04B0

Definition at line 31 of file dhm.h.


Function Documentation

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

Derive and export the shared secret (G^Y)^X mod P.

Parameters:
ctx DHM context
output destination buffer
olen number of chars written
Returns:
0 if successful, or an POLARSSL_ERR_DHM_XXX error code

void dhm_free ( dhm_context ctx  ) 

int dhm_make_params ( dhm_context ctx,
int  s_size,
unsigned char *  output,
int *  olen,
int(*)(void *)  f_rng,
void *  p_rng 
)

Setup and write the ServerKeyExchange parameters.

Parameters:
ctx DHM context
s_size private value size in bits
output destination buffer
olen number of chars written
f_rng RNG function
p_rng RNG parameter
Note:
This function assumes that ctx->P and ctx->G have already been properly set (for example using mpi_read_string or mpi_read_binary).
Returns:
0 if successful, or an POLARSSL_ERR_DHM_XXX error code

int dhm_make_public ( dhm_context ctx,
int  s_size,
unsigned char *  output,
int  olen,
int(*)(void *)  f_rng,
void *  p_rng 
)

Create own private value X and export G^X.

Parameters:
ctx DHM context
s_size private value size in bits
output destination buffer
olen must be equal to ctx->P.len
f_rng RNG function
p_rng RNG parameter
Returns:
0 if successful, or an POLARSSL_ERR_DHM_XXX error code

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

Parse the ServerKeyExchange parameters.

Parameters:
ctx DHM context
p &(start of input buffer)
end end of buffer
Returns:
0 if successful, or an POLARSSL_ERR_DHM_XXX error code

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

Import the peer's public value G^Y.

Parameters:
ctx DHM context
input input buffer
ilen size of buffer
Returns:
0 if successful, or an POLARSSL_ERR_DHM_XXX error code

int dhm_self_test ( int  verbose  ) 

Checkup routine.

Returns:
0 if successful, or 1 if the test failed


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