126 lines
3.8 KiB
C
126 lines
3.8 KiB
C
/* ecc.h
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*
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* Copyright (C) 2006-2013 wolfSSL Inc.
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*
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* This file is part of CyaSSL.
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*
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* CyaSSL is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* CyaSSL is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*/
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#ifdef HAVE_ECC
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#ifndef CTAO_CRYPT_ECC_H
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#define CTAO_CRYPT_ECC_H
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#include <cyassl/ctaocrypt/types.h>
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#include <cyassl/ctaocrypt/integer.h>
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#include <cyassl/ctaocrypt/random.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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enum {
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ECC_PUBLICKEY = 1,
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ECC_PRIVATEKEY = 2,
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ECC_MAXNAME = 16, /* MAX CURVE NAME LENGTH */
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SIG_HEADER_SZ = 6, /* ECC signature header size */
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ECC_BUFSIZE = 256, /* for exported keys temp buffer */
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ECC_MINSIZE = 20, /* MIN Private Key size */
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ECC_MAXSIZE = 66 /* MAX Private Key size */
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};
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/* ECC set type defined a NIST GF(p) curve */
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typedef struct {
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int size; /* The size of the curve in octets */
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const char* name; /* name of this curve */
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const char* prime; /* prime that defines the field, curve is in (hex) */
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const char* B; /* fields B param (hex) */
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const char* order; /* order of the curve (hex) */
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const char* Gx; /* x coordinate of the base point on curve (hex) */
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const char* Gy; /* y coordinate of the base point on curve (hex) */
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} ecc_set_type;
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/* A point on an ECC curve, stored in Jacbobian format such that (x,y,z) =>
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(x/z^2, y/z^3, 1) when interpreted as affine */
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typedef struct {
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mp_int x; /* The x coordinate */
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mp_int y; /* The y coordinate */
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mp_int z; /* The z coordinate */
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} ecc_point;
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/* An ECC Key */
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typedef struct {
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int type; /* Public or Private */
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int idx; /* Index into the ecc_sets[] for the parameters of
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this curve if -1, this key is using user supplied
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curve in dp */
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const ecc_set_type* dp; /* domain parameters, either points to NIST
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curves (idx >= 0) or user supplied */
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ecc_point pubkey; /* public key */
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mp_int k; /* private key */
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} ecc_key;
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/* ECC predefined curve sets */
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extern const ecc_set_type ecc_sets[];
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CYASSL_API
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int ecc_make_key(RNG* rng, int keysize, ecc_key* key);
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CYASSL_API
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int ecc_shared_secret(ecc_key* private_key, ecc_key* public_key, byte* out,
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word32* outlen);
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CYASSL_API
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int ecc_sign_hash(const byte* in, word32 inlen, byte* out, word32 *outlen,
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RNG* rng, ecc_key* key);
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CYASSL_API
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int ecc_verify_hash(const byte* sig, word32 siglen, const byte* hash,
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word32 hashlen, int* stat, ecc_key* key);
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CYASSL_API
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void ecc_init(ecc_key* key);
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CYASSL_API
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void ecc_free(ecc_key* key);
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CYASSL_API
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void ecc_fp_free(void);
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/* ASN key helpers */
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CYASSL_API
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int ecc_export_x963(ecc_key*, byte* out, word32* outLen);
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CYASSL_API
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int ecc_import_x963(const byte* in, word32 inLen, ecc_key* key);
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CYASSL_API
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int ecc_import_private_key(const byte* priv, word32 privSz, const byte* pub,
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word32 pubSz, ecc_key* key);
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/* size helper */
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CYASSL_API
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int ecc_size(ecc_key* key);
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CYASSL_API
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int ecc_sig_size(ecc_key* key);
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#ifdef __cplusplus
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} /* extern "C" */
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#endif
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#endif /* CTAO_CRYPT_ECC_H */
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#endif /* HAVE_ECC */
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