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/* $OpenBSD: csi.h,v 1.1 2018/06/02 17:40:33 jsing Exp $ */
/*
* Copyright (c) 2018 Joel Sing <jsing@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef HEADER_CSI_H
#define HEADER_CSI_H
#include <sys/types.h>
#include <stddef.h>
#include <stdint.h>
#ifdef __cplusplus
extern "C" {
#endif
#define CSI_ERR_MEM 1 /* Out of memory. */
#define CSI_ERR_INVAL 2 /* Invalid argument. */
#define CSI_ERR_CRYPTO 3 /* Crypto failure. */
/*
* Primitives.
*/
struct csi_integer {
const uint8_t *data;
size_t len;
};
/*
* Diffie-Hellman Key Exchange.
*/
struct csi_dh;
struct csi_dh_params {
struct csi_integer g;
struct csi_integer p;
};
struct csi_dh_public {
struct csi_integer key;
};
struct csi_dh_shared {
struct csi_integer key;
};
struct csi_dh *csi_dh_new(void);
void csi_dh_free(struct csi_dh *_cdh);
u_int csi_dh_size_bits(struct csi_dh *_cdh);
const char *csi_dh_error(struct csi_dh *_cdh);
int csi_dh_error_code(struct csi_dh *_cdh);
int csi_dh_set_params(struct csi_dh *_cdh, struct csi_dh_params *_params);
int csi_dh_set_peer_public(struct csi_dh *_cdh, struct csi_dh_public *_peer);
int csi_dh_generate_keys(struct csi_dh *_cdh, size_t _length,
struct csi_dh_public **_public);
int csi_dh_derive_shared_key(struct csi_dh *_cdh,
struct csi_dh_shared **_secret);
struct csi_dh_params *csi_dh_params(struct csi_dh *_cdh);
struct csi_dh_public *csi_dh_public_key(struct csi_dh *_cdh);
struct csi_dh_public *csi_dh_peer_public_key(struct csi_dh *_cdh);
void csi_dh_params_free(struct csi_dh_params *_cdhp);
void csi_dh_public_free(struct csi_dh_public *_cdhp);
void csi_dh_shared_free(struct csi_dh_shared *_cdhs);
struct csi_dh_params *csi_dh_params_modp_group1(void);
struct csi_dh_params *csi_dh_params_modp_group2(void);
struct csi_dh_params *csi_dh_params_modp_group5(void);
struct csi_dh_params *csi_dh_params_modp_group14(void);
struct csi_dh_params *csi_dh_params_modp_group15(void);
struct csi_dh_params *csi_dh_params_modp_group16(void);
struct csi_dh_params *csi_dh_params_modp_group17(void);
struct csi_dh_params *csi_dh_params_modp_group18(void);
#ifdef __cplusplus
}
#endif
#endif /* HEADER_CSI_H */
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