mirror of
https://github.com/cwyark/ameba-sdk-gcc-make.git
synced 2024-11-28 09:10:34 +00:00
236 lines
8 KiB
C
Executable file
236 lines
8 KiB
C
Executable file
/**
|
|
* \file ecdsa.h
|
|
*
|
|
* \brief Elliptic curve DSA
|
|
*
|
|
* Copyright (C) 2006-2013, Brainspark B.V.
|
|
*
|
|
* This file is part of PolarSSL (http://www.polarssl.org)
|
|
* Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
|
|
*
|
|
* All rights reserved.
|
|
*
|
|
* 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.
|
|
*/
|
|
#ifndef POLARSSL_ECDSA_H
|
|
#define POLARSSL_ECDSA_H
|
|
|
|
#include "ecp.h"
|
|
|
|
#if defined(POLARSSL_ECDSA_DETERMINISTIC)
|
|
#include "md.h"
|
|
#endif
|
|
|
|
/**
|
|
* \brief ECDSA context structure
|
|
*
|
|
* \note Purposefully begins with the same members as struct ecp_keypair.
|
|
*/
|
|
typedef struct
|
|
{
|
|
ecp_group grp; /*!< elliptic curve used */
|
|
mpi d; /*!< secret signature key */
|
|
ecp_point Q; /*!< public signature key */
|
|
mpi r; /*!< first integer from signature */
|
|
mpi s; /*!< second integer from signature */
|
|
}
|
|
ecdsa_context;
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/**
|
|
* \brief Compute ECDSA signature of a previously hashed message
|
|
*
|
|
* \param grp ECP group
|
|
* \param r First output integer
|
|
* \param s Second output integer
|
|
* \param d Private signing key
|
|
* \param buf Message hash
|
|
* \param blen Length of buf
|
|
* \param f_rng RNG function
|
|
* \param p_rng RNG parameter
|
|
*
|
|
* \return 0 if successful,
|
|
* or a POLARSSL_ERR_ECP_XXX or POLARSSL_MPI_XXX error code
|
|
*/
|
|
int ecdsa_sign( ecp_group *grp, mpi *r, mpi *s,
|
|
const mpi *d, const unsigned char *buf, size_t blen,
|
|
int (*f_rng)(void *, unsigned char *, size_t), void *p_rng );
|
|
|
|
#if defined(POLARSSL_ECDSA_DETERMINISTIC)
|
|
/**
|
|
* \brief Compute ECDSA signature of a previously hashed message
|
|
* (deterministic version)
|
|
*
|
|
* \param grp ECP group
|
|
* \param r First output integer
|
|
* \param s Second output integer
|
|
* \param d Private signing key
|
|
* \param buf Message hash
|
|
* \param blen Length of buf
|
|
* \param md_alg MD algorithm used to hash the message
|
|
*
|
|
* \return 0 if successful,
|
|
* or a POLARSSL_ERR_ECP_XXX or POLARSSL_MPI_XXX error code
|
|
*/
|
|
int ecdsa_sign_det( ecp_group *grp, mpi *r, mpi *s,
|
|
const mpi *d, const unsigned char *buf, size_t blen,
|
|
md_type_t md_alg );
|
|
#endif /* POLARSSL_ECDSA_DETERMINISTIC */
|
|
|
|
/**
|
|
* \brief Verify ECDSA signature of a previously hashed message
|
|
*
|
|
* \param grp ECP group
|
|
* \param buf Message hash
|
|
* \param blen Length of buf
|
|
* \param Q Public key to use for verification
|
|
* \param r First integer of the signature
|
|
* \param s Second integer of the signature
|
|
*
|
|
* \return 0 if successful,
|
|
* POLARSSL_ERR_ECP_BAD_INPUT_DATA if signature is invalid
|
|
* or a POLARSSL_ERR_ECP_XXX or POLARSSL_MPI_XXX error code
|
|
*/
|
|
int ecdsa_verify( ecp_group *grp,
|
|
const unsigned char *buf, size_t blen,
|
|
const ecp_point *Q, const mpi *r, const mpi *s);
|
|
|
|
/**
|
|
* \brief Compute ECDSA signature and write it to buffer,
|
|
* serialized as defined in RFC 4492 page 20.
|
|
* (Not thread-safe to use same context in multiple threads)
|
|
*
|
|
* \param ctx ECDSA context
|
|
* \param hash Message hash
|
|
* \param hlen Length of hash
|
|
* \param sig Buffer that will hold the signature
|
|
* \param slen Length of the signature written
|
|
* \param f_rng RNG function
|
|
* \param p_rng RNG parameter
|
|
*
|
|
* \note The "sig" buffer must be at least as large as twice the
|
|
* size of the curve used, plus 7 (eg. 71 bytes if a 256-bit
|
|
* curve is used).
|
|
*
|
|
* \return 0 if successful,
|
|
* or a POLARSSL_ERR_ECP, POLARSSL_ERR_MPI or
|
|
* POLARSSL_ERR_ASN1 error code
|
|
*/
|
|
int ecdsa_write_signature( ecdsa_context *ctx,
|
|
const unsigned char *hash, size_t hlen,
|
|
unsigned char *sig, size_t *slen,
|
|
int (*f_rng)(void *, unsigned char *, size_t),
|
|
void *p_rng );
|
|
|
|
#if defined(POLARSSL_ECDSA_DETERMINISTIC)
|
|
/**
|
|
* \brief Compute ECDSA signature and write it to buffer,
|
|
* serialized as defined in RFC 4492 page 20.
|
|
* Deterministic version, RFC 6979.
|
|
* (Not thread-safe to use same context in multiple threads)
|
|
*
|
|
* \param ctx ECDSA context
|
|
* \param hash Message hash
|
|
* \param hlen Length of hash
|
|
* \param sig Buffer that will hold the signature
|
|
* \param slen Length of the signature written
|
|
* \param md_alg MD algorithm used to hash the message
|
|
*
|
|
* \note The "sig" buffer must be at least as large as twice the
|
|
* size of the curve used, plus 7 (eg. 71 bytes if a 256-bit
|
|
* curve is used).
|
|
*
|
|
* \return 0 if successful,
|
|
* or a POLARSSL_ERR_ECP, POLARSSL_ERR_MPI or
|
|
* POLARSSL_ERR_ASN1 error code
|
|
*/
|
|
int ecdsa_write_signature_det( ecdsa_context *ctx,
|
|
const unsigned char *hash, size_t hlen,
|
|
unsigned char *sig, size_t *slen,
|
|
md_type_t md_alg );
|
|
#endif /* POLARSSL_ECDSA_DETERMINISTIC */
|
|
|
|
/**
|
|
* \brief Read and verify an ECDSA signature
|
|
*
|
|
* \param ctx ECDSA context
|
|
* \param hash Message hash
|
|
* \param hlen Size of hash
|
|
* \param sig Signature to read and verify
|
|
* \param slen Size of sig
|
|
*
|
|
* \return 0 if successful,
|
|
* POLARSSL_ERR_ECP_BAD_INPUT_DATA if signature is invalid,
|
|
* POLARSSL_ERR_ECP_SIG_LEN_MISTMATCH if the signature is
|
|
* valid but its actual length is less than siglen,
|
|
* or a POLARSSL_ERR_ECP or POLARSSL_ERR_MPI error code
|
|
*/
|
|
int ecdsa_read_signature( ecdsa_context *ctx,
|
|
const unsigned char *hash, size_t hlen,
|
|
const unsigned char *sig, size_t slen );
|
|
|
|
/**
|
|
* \brief Generate an ECDSA keypair on the given curve
|
|
*
|
|
* \param ctx ECDSA context in which the keypair should be stored
|
|
* \param gid Group (elliptic curve) to use. One of the various
|
|
* POLARSSL_ECP_DP_XXX macros depending on configuration.
|
|
* \param f_rng RNG function
|
|
* \param p_rng RNG parameter
|
|
*
|
|
* \return 0 on success, or a POLARSSL_ERR_ECP code.
|
|
*/
|
|
int ecdsa_genkey( ecdsa_context *ctx, ecp_group_id gid,
|
|
int (*f_rng)(void *, unsigned char *, size_t), void *p_rng );
|
|
|
|
/**
|
|
* \brief Set an ECDSA context from an EC key pair
|
|
*
|
|
* \param ctx ECDSA context to set
|
|
* \param key EC key to use
|
|
*
|
|
* \return 0 on success, or a POLARSSL_ERR_ECP code.
|
|
*/
|
|
int ecdsa_from_keypair( ecdsa_context *ctx, const ecp_keypair *key );
|
|
|
|
/**
|
|
* \brief Initialize context
|
|
*
|
|
* \param ctx Context to initialize
|
|
*/
|
|
void ecdsa_init( ecdsa_context *ctx );
|
|
|
|
/**
|
|
* \brief Free context
|
|
*
|
|
* \param ctx Context to free
|
|
*/
|
|
void ecdsa_free( ecdsa_context *ctx );
|
|
|
|
/**
|
|
* \brief Checkup routine
|
|
*
|
|
* \return 0 if successful, or 1 if the test failed
|
|
*/
|
|
int ecdsa_self_test( int verbose );
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* ecdsa.h */
|