/*
- silcdh.h
+ silcdh.h
- Author: Pekka Riikonen <priikone@poseidon.pspt.fi>
+ Author: Pekka Riikonen <priikone@silcnet.org>
Copyright (C) 2001 Pekka Riikonen
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.
-
+ the Free Software Foundation; version 2 of the License.
+
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.
*/
-/* PKCS #3 compliant Diffie Hellman key agreement protocol implementation.
- This is used as part of SKE (SILC Key Exchange) protocol. */
+
+/****h* silccrypt/SilcDH/silcdh.h
+ *
+ * DESCRIPTION
+ *
+ * PKCS #3 compliant Diffie Hellman key agreement protocol implementation.
+ * This is used as part of SKE (SILC Key Exchange) protocol.
+ *
+ ***/
#ifndef SILCDH_H
#define SILCDH_H
#include "silcmp.h"
-#include "silcrng.h"
-/* Forward declaration of Diffie Hellman context */
+/****s* silccrypt/SilcDH/SilcDH
+ *
+ * NAME
+ *
+ * typedef struct SilcDHStruct *SilcDH;
+ *
+ * DESCRIPTION
+ *
+ * This context is allocated by silc_dh_alloc and is given as argument
+ * to all silc_dh_* functions. It is freed by silc_dh_free function.
+ *
+ ***/
typedef struct SilcDHStruct *SilcDH;
/* XXX Move to source file */
/* Diffie Hellman context. This includes the DH parameters including the
negotiated key material. */
struct SilcDHStruct {
- SilcInt *g; /* Global base (generator) */
- SilcInt *p; /* Global prime (modulus, prime) */
- SilcInt *lpf; /* Largest prime factor (prime) */
- SilcInt *my_x; /* x, My private value (random) */
- SilcInt *my_y; /* y, My public value (y = g ^ x mod p) */
- SilcInt *your_y; /* y', Your public value (y' = g ^ x' mod p) */
- SilcInt *z; /* The computed secret key (z = y' ^ x mod p) */
-
- SilcRng rng; /* RNG */
+ SilcMPInt *g; /* Global base (generator) */
+ SilcMPInt *p; /* Global prime (modulus, prime) */
+ SilcMPInt *lpf; /* Largest prime factor (prime) */
+ SilcMPInt *my_x; /* x, My private value (random) */
+ SilcMPInt *my_y; /* y, My public value (y = g ^ x mod p) */
+ SilcMPInt *your_y; /* y', Your public value (y' = g ^ x' mod p) */
+ SilcMPInt *z; /* The computed secret key (z = y' ^ x mod p) */
};
-/* Allocate DH context. The `rng' must be initialized random number generator
- context, the `g' is the public base generator used in the negotiation,
- the `p' is the public prime used in the negotiation and the `lpf' is
- largest prime factor of p defined publicly as well. The `lpf' is optional
- and if it is not supplied then the private values generated satifies
- 0 < x < p - 1 instead of 0 < x < lpf. Returns NULL on error or allocated
- DH context on success. */
-SilcDH silc_dh_alloc(SilcRng rng, SilcInt *g, SilcInt *p, SilcInt *lpf);
-
-/* Frees the DH context. Does not free the RNG context given in the
- allocation. Frees all the allocated data inside the DH context. */
+/****f* silccrypt/SilcDH/silc_dh_alloc
+ *
+ * SYNOPSIS
+ *
+ * SilcDH silc_dh_alloc(SilcMPInt *g, SilcMPInt *p, SilcMPInt *lpf);
+ *
+ * DESCRIPTION
+ *
+ * Allocate SilcDH context. The `g' is the public base generator used
+ * in the negotiation, the `p' is the public prime used in the
+ * negotiation and the `lpf' is largest prime factor of p defined
+ * publicly as well. The `lpf' is optional and if it is not supplied
+ * then the private values generated satifies 0 < x < p - 1 instead
+ * of 0 < x < lpf. Returns NULL on error or allocated SilcDH context
+ * on success.
+ *
+ ***/
+SilcDH silc_dh_alloc(SilcMPInt *g, SilcMPInt *p, SilcMPInt *lpf);
+
+/****f* silccrypt/SilcDH/silc_dh_free
+ *
+ * SYNOPSIS
+ *
+ * void silc_dh_free(SilcDH dh);
+ *
+ * DESCRIPTION
+ *
+ * Free the SilcDH context. Frees all the allocated data inside the
+ * SilcDH context.
+ *
+ ***/
void silc_dh_free(SilcDH dh);
-/* Generates random private value `x' such that 0 < x < lpf at most of
- length of lpf. Returns FALSE if the random number could not be generated.
- Returns the generated value into `x' pointer sent as argument, unless
- the `x' is NULL. The returned `x' must no be freed by the caller. */
-int silc_dh_generate_private(SilcDH dh, SilcInt **x);
-
-/* Computes the public key y = g ^ x mod p, and returns it to the `y'
- pointer sent as argument, unless the `y' is NULL. Returns FALSE if
- the computation could not be performed. The returned `y' must not be
- freed by the caller. */
-int silc_dh_compute_public(SilcDH dh, SilcInt **y);
-
-/* Sets the remote end's public value y' into the DH context. This must be
- done before computing the secret key. Returns FALSE on error. */
-int silc_dh_set_remote_public(SilcDH dh, SilcInt *y);
-
-/* Computes the secret key z = y' ^ x mod p, and returns the key to the
- `z' pointer sent as argument, unless the `z' is NULL. Returns FALSE if
- the computation could not be performed. The returned `z' must not be
- freed by the caller. */
-int silc_dh_compute_key(SilcDH dh, SilcInt **z);
-
-/* Same as above but returns the computed secret key as octet binary
- string. */
-int silc_dh_compute_key_data(SilcDH dh, unsigned char **z,
- uint32 *z_len);
+/****f* silccrypt/SilcDH/silc_dh_generate_private
+ *
+ * SYNOPSIS
+ *
+ * bool silc_dh_generate_private(SilcDH dh, const SilcMPInt **x);
+ *
+ * DESCRIPTION
+ *
+ * Generates random private value `x' such that 0 < x < lpf at most of
+ * length of lpf. Returns FALSE if the random number could not be generated.
+ * Returns the generated value into `x' pointer sent as argument, unless
+ * the `x' is NULL. The returned `x' must not be freed by the caller.
+ *
+ ***/
+bool silc_dh_generate_private(SilcDH dh, const SilcMPInt **x);
+
+/****f* silccrypt/SilcDH/silc_dh_compute_public
+ *
+ * SYNOPSIS
+ *
+ * bool silc_dh_compute_public(SilcDH dh, const SilcMPInt **y);
+ *
+ * DESCRIPTION
+ *
+ * Computes the public key y = g ^ x mod p, and returns it to the `y'
+ * pointer sent as argument, unless the `y' is NULL. Returns FALSE if
+ * the computation could not be performed. The returned `y' must not be
+ * freed by the caller.
+ *
+ ***/
+bool silc_dh_compute_public(SilcDH dh, const SilcMPInt **y);
+
+/****f* silccrypt/SilcDH/silc_dh_remote_public
+ *
+ * SYNOPSIS
+ *
+ * bool silc_dh_compute_public(SilcDH dh, SilcMPInt *y);
+ *
+ * DESCRIPTION
+ *
+ * Sets the remote end's public value y' into the SilcDH context.
+ * This must be done before computing the secret key. Returns FALSE
+ * on error.
+ *
+ ***/
+bool silc_dh_set_remote_public(SilcDH dh, SilcMPInt *y);
+
+/****f* silccrypt/SilcDH/silc_dh_compute_key
+ *
+ * SYNOPSIS
+ *
+ * bool silc_dh_compute_key(SilcDH dh, const SilcMPInt **z);
+ *
+ * DESCRIPTION
+ *
+ * Computes the secret key z = y' ^ x mod p, and returns the key to the
+ * `z' pointer sent as argument, unless the `z' is NULL. Returns FALSE if
+ * the computation could not be performed. The returned `z' must not be
+ * freed by the caller.
+ *
+ ***/
+bool silc_dh_compute_key(SilcDH dh, const SilcMPInt **z);
+
+/****f* silccrypt/SilcDH/silc_dh_remote_public
+ *
+ * SYNOPSIS
+ *
+ * bool silc_dh_compute_key_data(SilcDH dh, unsigned char **z,
+ * SilcUInt32 *z_len);
+ *
+ * DESCRIPTION
+ *
+ * Same as above but returns the computed secret key as octet binary
+ * string. The caller must free the returned binary string.
+ *
+ ***/
+bool silc_dh_compute_key_data(SilcDH dh, unsigned char **z,
+ SilcUInt32 *z_len);
#endif
projects / silc.git / blobdiff