linux/crypto/ecrdsa.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Elliptic Curve (Russian) Digital Signature Algorithm for Cryptographic API
 *
 * Copyright (c) 2019 Vitaly Chikunov <[email protected]>
 *
 * References:
 * GOST 34.10-2018, GOST R 34.10-2012, RFC 7091, ISO/IEC 14888-3:2018.
 *
 * Historical references:
 * GOST R 34.10-2001, RFC 4357, ISO/IEC 14888-3:2006/Amd 1:2010.
 *
 * 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.
 */

#include <linux/module.h>
#include <linux/crypto.h>
#include <crypto/streebog.h>
#include <crypto/internal/akcipher.h>
#include <crypto/internal/ecc.h>
#include <crypto/akcipher.h>
#include <linux/oid_registry.h>
#include <linux/scatterlist.h>
#include "ecrdsa_params.asn1.h"
#include "ecrdsa_pub_key.asn1.h"
#include "ecrdsa_defs.h"

#define ECRDSA_MAX_SIG_SIZE …
#define ECRDSA_MAX_DIGITS …

struct ecrdsa_ctx { … };

static const struct ecc_curve *get_curve_by_oid(enum OID oid)
{ … }

static int ecrdsa_verify(struct akcipher_request *req)
{ … }

int ecrdsa_param_curve(void *context, size_t hdrlen, unsigned char tag,
		       const void *value, size_t vlen)
{ … }

/* Optional. If present should match expected digest algo OID. */
int ecrdsa_param_digest(void *context, size_t hdrlen, unsigned char tag,
			const void *value, size_t vlen)
{ … }

int ecrdsa_parse_pub_key(void *context, size_t hdrlen, unsigned char tag,
			 const void *value, size_t vlen)
{ … }

static u8 *ecrdsa_unpack_u32(u32 *dst, void *src)
{ … }

/* Parse BER encoded subjectPublicKey. */
static int ecrdsa_set_pub_key(struct crypto_akcipher *tfm, const void *key,
			      unsigned int keylen)
{ … }

static unsigned int ecrdsa_max_size(struct crypto_akcipher *tfm)
{ … }

static void ecrdsa_exit_tfm(struct crypto_akcipher *tfm)
{ … }

static struct akcipher_alg ecrdsa_alg = …;

static int __init ecrdsa_mod_init(void)
{ … }

static void __exit ecrdsa_mod_fini(void)
{ … }

module_init(…) …;
module_exit(ecrdsa_mod_fini);

MODULE_LICENSE(…) …;
MODULE_AUTHOR(…) …;
MODULE_DESCRIPTION(…) …;
MODULE_ALIAS_CRYPTO(…) …;
MODULE_ALIAS_CRYPTO(…) …;