643 lines
20 KiB
C
643 lines
20 KiB
C
/**********************************************************************
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* gost_ec_sign.c *
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* Copyright (c) 2005-2013 Cryptocom LTD *
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* This file is distributed under the same license as OpenSSL *
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* *
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* Implementation of GOST R 34.10-2001 *
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* Requires OpenSSL 1.0.0+ for compilation *
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**********************************************************************/
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#include "gost_lcl.h"
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#include <string.h>
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#include <openssl/rand.h>
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#include <openssl/ecdsa.h>
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#include <openssl/err.h>
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#include "e_gost_err.h"
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#ifdef DEBUG_SIGN
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extern
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void dump_signature(const char *message, const unsigned char *buffer,
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size_t len);
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void dump_dsa_sig(const char *message, ECDSA_SIG *sig);
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#else
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# define dump_signature(a,b,c)
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# define dump_dsa_sig(a,b)
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#endif
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static R3410_ec_params *gost_nid2params(int nid)
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{
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R3410_ec_params *params;
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/* Map tc26-2012 256-bit parameters to cp-2001 parameters */
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switch (nid) {
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case NID_id_tc26_gost_3410_2012_256_paramSetB:
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nid = NID_id_GostR3410_2001_CryptoPro_A_ParamSet;
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break;
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case NID_id_tc26_gost_3410_2012_256_paramSetC:
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nid = NID_id_GostR3410_2001_CryptoPro_B_ParamSet;
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break;
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case NID_id_tc26_gost_3410_2012_256_paramSetD:
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nid = NID_id_GostR3410_2001_CryptoPro_C_ParamSet;
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}
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/* Search nid in 2012 paramset */
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params = R3410_2012_512_paramset;
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while (params->nid != NID_undef) {
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if (params->nid == nid)
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return params;
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params++;
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}
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/* Search nid in 2001 paramset */
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params = R3410_2001_paramset;
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while (params->nid != NID_undef) {
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if (params->nid == nid)
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return params;
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params++;
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}
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return NULL;
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}
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void free_cached_groups()
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{
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R3410_ec_params *params;
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/* Search nid in 2012 paramset */
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params = R3410_2012_512_paramset;
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while (params->nid != NID_undef) {
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EC_GROUP_free(params->group);
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params->group = NULL;
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params++;
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}
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/* Search nid in 2001 paramset */
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params = R3410_2001_paramset;
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while (params->nid != NID_undef) {
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EC_GROUP_free(params->group);
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params->group = NULL;
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params++;
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}
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}
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/*
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* Fills EC_KEY structure hidden in the app_data field of DSA structure
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* with parameter information, extracted from parameter array in
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* params.c file.
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*
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* Also fils DSA->q field with copy of EC_GROUP order field to make
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* DSA_size function work
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*/
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int fill_GOST_EC_params(EC_KEY *eckey, int nid)
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{
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R3410_ec_params *params = gost_nid2params(nid);
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EC_GROUP *grp = NULL;
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EC_POINT *P = NULL;
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BIGNUM *p = NULL, *q = NULL, *a = NULL, *b = NULL, *x = NULL, *y =
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NULL, *cofactor = NULL;
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BN_CTX *ctx = NULL;
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int ok = 0;
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if (!eckey || !params) {
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GOSTerr(GOST_F_FILL_GOST_EC_PARAMS, GOST_R_UNSUPPORTED_PARAMETER_SET);
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return 0;
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}
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if (params->group) {
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EC_GROUP_set_curve_name(params->group, nid);
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if (!EC_KEY_set_group(eckey, params->group)) {
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GOSTerr(GOST_F_FILL_GOST_EC_PARAMS, ERR_R_INTERNAL_ERROR);
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goto end;
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}
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return 1;
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}
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if (!(ctx = BN_CTX_new())) {
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GOSTerr(GOST_F_FILL_GOST_EC_PARAMS, ERR_R_MALLOC_FAILURE);
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return 0;
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}
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BN_CTX_start(ctx);
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p = BN_CTX_get(ctx);
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a = BN_CTX_get(ctx);
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b = BN_CTX_get(ctx);
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x = BN_CTX_get(ctx);
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y = BN_CTX_get(ctx);
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q = BN_CTX_get(ctx);
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cofactor = BN_CTX_get(ctx);
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if (!p || !a || !b || !x || !y || !q || !cofactor) {
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GOSTerr(GOST_F_FILL_GOST_EC_PARAMS, ERR_R_MALLOC_FAILURE);
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goto end;
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}
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if (!BN_hex2bn(&p, params->p)
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|| !BN_hex2bn(&a, params->a)
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|| !BN_hex2bn(&b, params->b)
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|| !BN_hex2bn(&cofactor, params->cofactor)) {
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GOSTerr(GOST_F_FILL_GOST_EC_PARAMS, ERR_R_INTERNAL_ERROR);
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goto end;
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}
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grp = EC_GROUP_new_curve_GFp(p, a, b, ctx);
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if (!grp) {
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GOSTerr(GOST_F_FILL_GOST_EC_PARAMS, ERR_R_MALLOC_FAILURE);
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goto end;
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}
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P = EC_POINT_new(grp);
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if (!P) {
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GOSTerr(GOST_F_FILL_GOST_EC_PARAMS, ERR_R_MALLOC_FAILURE);
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goto end;
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}
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if (!BN_hex2bn(&x, params->x)
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|| !BN_hex2bn(&y, params->y)
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|| !EC_POINT_set_affine_coordinates(grp, P, x, y, ctx)
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|| !BN_hex2bn(&q, params->q)) {
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GOSTerr(GOST_F_FILL_GOST_EC_PARAMS, ERR_R_INTERNAL_ERROR);
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goto end;
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}
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if (!EC_GROUP_set_generator(grp, P, q, cofactor)) {
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GOSTerr(GOST_F_FILL_GOST_EC_PARAMS, ERR_R_INTERNAL_ERROR);
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goto end;
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}
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EC_GROUP_set_curve_name(grp, nid);
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params->group = grp;
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if (!EC_KEY_set_group(eckey, grp)) {
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GOSTerr(GOST_F_FILL_GOST_EC_PARAMS, ERR_R_INTERNAL_ERROR);
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goto end;
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}
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ok = 1;
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end:
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EC_POINT_free(P);
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BN_CTX_end(ctx);
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BN_CTX_free(ctx);
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return ok;
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}
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/*
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* Computes gost_ec signature as ECDSA_SIG structure
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*
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*/
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ECDSA_SIG *gost_ec_sign(const unsigned char *dgst, int dlen, EC_KEY *eckey)
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{
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ECDSA_SIG *newsig = NULL, *ret = NULL;
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BIGNUM *md = NULL;
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BIGNUM *order = NULL;
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const EC_GROUP *group;
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const BIGNUM *priv_key;
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BIGNUM *r = NULL, *s = NULL, *X = NULL, *tmp = NULL, *tmp2 = NULL,
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*k = NULL, *e = NULL;
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BIGNUM *new_r = NULL, *new_s = NULL;
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EC_POINT *C = NULL;
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BN_CTX *ctx;
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OPENSSL_assert(dgst != NULL && eckey != NULL);
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if (!(ctx = BN_CTX_secure_new())) {
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GOSTerr(GOST_F_GOST_EC_SIGN, ERR_R_MALLOC_FAILURE);
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return NULL;
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}
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BN_CTX_start(ctx);
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OPENSSL_assert(dlen == 32 || dlen == 64);
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md = BN_lebin2bn(dgst, dlen, NULL);
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newsig = ECDSA_SIG_new();
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if (!newsig || !md) {
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GOSTerr(GOST_F_GOST_EC_SIGN, ERR_R_MALLOC_FAILURE);
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goto err;
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}
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group = EC_KEY_get0_group(eckey);
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if (!group) {
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GOSTerr(GOST_F_GOST_EC_SIGN, ERR_R_INTERNAL_ERROR);
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goto err;
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}
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order = BN_CTX_get(ctx);
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if (!order || !EC_GROUP_get_order(group, order, ctx)) {
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GOSTerr(GOST_F_GOST_EC_SIGN, ERR_R_INTERNAL_ERROR);
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goto err;
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}
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priv_key = EC_KEY_get0_private_key(eckey);
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if (!priv_key) {
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GOSTerr(GOST_F_GOST_EC_SIGN, ERR_R_INTERNAL_ERROR);
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goto err;
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}
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e = BN_CTX_get(ctx);
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if (!e || !BN_mod(e, md, order, ctx)) {
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GOSTerr(GOST_F_GOST_EC_SIGN, ERR_R_INTERNAL_ERROR);
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goto err;
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}
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#ifdef DEBUG_SIGN
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fprintf(stderr, "digest as bignum=");
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BN_print_fp(stderr, md);
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fprintf(stderr, "\ndigest mod q=");
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BN_print_fp(stderr, e);
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fprintf(stderr, "\n");
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#endif
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if (BN_is_zero(e)) {
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BN_one(e);
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}
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k = BN_CTX_get(ctx);
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C = EC_POINT_new(group);
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if (!k || !C) {
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GOSTerr(GOST_F_GOST_EC_SIGN, ERR_R_MALLOC_FAILURE);
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goto err;
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}
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do {
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do {
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if (!BN_rand_range(k, order)) {
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GOSTerr(GOST_F_GOST_EC_SIGN, GOST_R_RNG_ERROR);
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goto err;
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}
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if (!gost_ec_point_mul(group, C, k, NULL, NULL, ctx)) {
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GOSTerr(GOST_F_GOST_EC_SIGN, ERR_R_EC_LIB);
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goto err;
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}
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if (!X)
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X = BN_CTX_get(ctx);
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if (!r)
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r = BN_CTX_get(ctx);
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if (!X || !r) {
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GOSTerr(GOST_F_GOST_EC_SIGN, ERR_R_MALLOC_FAILURE);
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goto err;
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}
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if (!EC_POINT_get_affine_coordinates(group, C, X, NULL, ctx)) {
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GOSTerr(GOST_F_GOST_EC_SIGN, ERR_R_EC_LIB);
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goto err;
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}
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if (!BN_nnmod(r, X, order, ctx)) {
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GOSTerr(GOST_F_GOST_EC_SIGN, ERR_R_INTERNAL_ERROR);
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goto err;
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}
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}
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while (BN_is_zero(r));
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/* s = (r*priv_key+k*e) mod order */
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if (!tmp)
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tmp = BN_CTX_get(ctx);
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if (!tmp2)
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tmp2 = BN_CTX_get(ctx);
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if (!s)
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s = BN_CTX_get(ctx);
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if (!tmp || !tmp2 || !s) {
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GOSTerr(GOST_F_GOST_EC_SIGN, ERR_R_MALLOC_FAILURE);
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goto err;
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}
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if (!BN_mod_mul(tmp, priv_key, r, order, ctx)
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|| !BN_mod_mul(tmp2, k, e, order, ctx)
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|| !BN_mod_add(s, tmp, tmp2, order, ctx)) {
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GOSTerr(GOST_F_GOST_EC_SIGN, ERR_R_INTERNAL_ERROR);
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goto err;
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}
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}
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while (BN_is_zero(s));
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new_s = BN_dup(s);
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new_r = BN_dup(r);
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if (!new_s || !new_r) {
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GOSTerr(GOST_F_GOST_EC_SIGN, ERR_R_MALLOC_FAILURE);
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goto err;
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}
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ECDSA_SIG_set0(newsig, new_r, new_s);
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ret = newsig;
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err:
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BN_CTX_end(ctx);
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BN_CTX_free(ctx);
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if (C)
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EC_POINT_free(C);
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if (md)
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BN_free(md);
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if (!ret && newsig) {
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ECDSA_SIG_free(newsig);
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}
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return ret;
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}
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/*
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* Verifies gost ec signature
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*
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*/
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int gost_ec_verify(const unsigned char *dgst, int dgst_len,
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ECDSA_SIG *sig, EC_KEY *ec)
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{
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BN_CTX *ctx;
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const EC_GROUP *group = (ec) ? EC_KEY_get0_group(ec) : NULL;
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BIGNUM *order;
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BIGNUM *md = NULL, *e = NULL, *R = NULL, *v = NULL, *z1 = NULL, *z2 = NULL;
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const BIGNUM *sig_s = NULL, *sig_r = NULL;
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BIGNUM *X = NULL, *tmp = NULL;
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EC_POINT *C = NULL;
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const EC_POINT *pub_key = NULL;
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int ok = 0;
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OPENSSL_assert(dgst != NULL && sig != NULL && group != NULL);
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if (!(ctx = BN_CTX_new())) {
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GOSTerr(GOST_F_GOST_EC_VERIFY, ERR_R_MALLOC_FAILURE);
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return 0;
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}
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BN_CTX_start(ctx);
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order = BN_CTX_get(ctx);
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e = BN_CTX_get(ctx);
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z1 = BN_CTX_get(ctx);
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z2 = BN_CTX_get(ctx);
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tmp = BN_CTX_get(ctx);
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X = BN_CTX_get(ctx);
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R = BN_CTX_get(ctx);
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v = BN_CTX_get(ctx);
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if (!order || !e || !z1 || !z2 || !tmp || !X || !R || !v) {
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GOSTerr(GOST_F_GOST_EC_VERIFY, ERR_R_MALLOC_FAILURE);
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goto err;
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}
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pub_key = EC_KEY_get0_public_key(ec);
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if (!pub_key || !EC_GROUP_get_order(group, order, ctx)) {
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GOSTerr(GOST_F_GOST_EC_VERIFY, ERR_R_INTERNAL_ERROR);
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goto err;
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}
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ECDSA_SIG_get0(sig, &sig_r, &sig_s);
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if (BN_is_zero(sig_s) || BN_is_zero(sig_r) ||
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BN_is_negative(sig_s) || BN_is_negative(sig_r) ||
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BN_ucmp(sig_s, order) >= 0 || BN_ucmp(sig_r, order) >= 0) {
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GOSTerr(GOST_F_GOST_EC_VERIFY, GOST_R_SIGNATURE_PARTS_GREATER_THAN_Q);
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goto err;
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}
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OPENSSL_assert(dgst_len == 32 || dgst_len == 64);
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md = BN_lebin2bn(dgst, dgst_len, NULL);
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if (!md || !BN_mod(e, md, order, ctx)) {
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GOSTerr(GOST_F_GOST_EC_VERIFY, ERR_R_INTERNAL_ERROR);
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goto err;
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}
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#ifdef DEBUG_SIGN
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fprintf(stderr, "digest as bignum: ");
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BN_print_fp(stderr, md);
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fprintf(stderr, "\ndigest mod q: ");
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BN_print_fp(stderr, e);
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#endif
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if (BN_is_zero(e) && !BN_one(e)) {
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GOSTerr(GOST_F_GOST_EC_VERIFY, ERR_R_INTERNAL_ERROR);
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goto err;
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}
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v = BN_mod_inverse(v, e, order, ctx);
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if (!v || !BN_mod_mul(z1, sig_s, v, order, ctx)
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|| !BN_sub(tmp, order, sig_r)
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|| !BN_mod_mul(z2, tmp, v, order, ctx)) {
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GOSTerr(GOST_F_GOST_EC_VERIFY, ERR_R_INTERNAL_ERROR);
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goto err;
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}
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#ifdef DEBUG_SIGN
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fprintf(stderr, "\nInverted digest value: ");
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BN_print_fp(stderr, v);
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fprintf(stderr, "\nz1: ");
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BN_print_fp(stderr, z1);
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fprintf(stderr, "\nz2: ");
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BN_print_fp(stderr, z2);
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#endif
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C = EC_POINT_new(group);
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if (!C) {
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GOSTerr(GOST_F_GOST_EC_VERIFY, ERR_R_MALLOC_FAILURE);
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goto err;
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}
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if (!gost_ec_point_mul(group, C, z1, pub_key, z2, ctx)) {
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GOSTerr(GOST_F_GOST_EC_VERIFY, ERR_R_EC_LIB);
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goto err;
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}
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if (!EC_POINT_get_affine_coordinates(group, C, X, NULL, ctx)) {
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GOSTerr(GOST_F_GOST_EC_VERIFY, ERR_R_EC_LIB);
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goto err;
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}
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if (!BN_mod(R, X, order, ctx)) {
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GOSTerr(GOST_F_GOST_EC_VERIFY, ERR_R_INTERNAL_ERROR);
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goto err;
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}
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#ifdef DEBUG_SIGN
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fprintf(stderr, "\nX=");
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BN_print_fp(stderr, X);
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fprintf(stderr, "\nX mod q=");
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BN_print_fp(stderr, R);
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fprintf(stderr, "\n");
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#endif
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if (BN_cmp(R, sig_r) != 0) {
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GOSTerr(GOST_F_GOST_EC_VERIFY, GOST_R_SIGNATURE_MISMATCH);
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} else {
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ok = 1;
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}
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err:
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if (C)
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EC_POINT_free(C);
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BN_CTX_end(ctx);
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BN_CTX_free(ctx);
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if (md)
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BN_free(md);
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return ok;
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}
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/*
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* Computes GOST R 34.10-2001 public key
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* or GOST R 34.10-2012 public key
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*
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*/
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int gost_ec_compute_public(EC_KEY *ec)
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{
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const EC_GROUP *group = (ec) ? EC_KEY_get0_group(ec) : NULL;
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EC_POINT *pub_key = NULL;
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const BIGNUM *priv_key = NULL;
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BN_CTX *ctx = NULL;
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int ok = 0;
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if (!group) {
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GOSTerr(GOST_F_GOST_EC_COMPUTE_PUBLIC, GOST_R_KEY_IS_NOT_INITIALIZED);
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return 0;
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}
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ctx = BN_CTX_secure_new();
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if (!ctx) {
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GOSTerr(GOST_F_GOST_EC_COMPUTE_PUBLIC, ERR_R_MALLOC_FAILURE);
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return 0;
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}
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BN_CTX_start(ctx);
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priv_key = EC_KEY_get0_private_key(ec);
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if (!priv_key) {
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GOSTerr(GOST_F_GOST_EC_COMPUTE_PUBLIC, ERR_R_EC_LIB);
|
|
goto err;
|
|
}
|
|
|
|
pub_key = EC_POINT_new(group);
|
|
if (!pub_key) {
|
|
GOSTerr(GOST_F_GOST_EC_COMPUTE_PUBLIC, ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
|
|
if (!gost_ec_point_mul(group, pub_key, priv_key, NULL, NULL, ctx)) {
|
|
GOSTerr(GOST_F_GOST_EC_COMPUTE_PUBLIC, ERR_R_EC_LIB);
|
|
goto err;
|
|
}
|
|
if (!EC_KEY_set_public_key(ec, pub_key)) {
|
|
GOSTerr(GOST_F_GOST_EC_COMPUTE_PUBLIC, ERR_R_EC_LIB);
|
|
goto err;
|
|
}
|
|
ok = 1;
|
|
err:
|
|
if (pub_key)
|
|
EC_POINT_free(pub_key);
|
|
BN_CTX_end(ctx);
|
|
BN_CTX_free(ctx);
|
|
return ok;
|
|
}
|
|
|
|
int gost_ec_point_mul(const EC_GROUP *group, EC_POINT *r, const BIGNUM *n,
|
|
const EC_POINT *q, const BIGNUM *m, BN_CTX *ctx)
|
|
{
|
|
if (group == NULL || r == NULL || ctx == NULL)
|
|
return 0;
|
|
|
|
if (m != NULL && n != NULL) {
|
|
/* verification */
|
|
if (q == NULL)
|
|
return 0;
|
|
switch(EC_GROUP_get_curve_name(group)) {
|
|
case NID_id_GostR3410_2001_CryptoPro_A_ParamSet:
|
|
case NID_id_GostR3410_2001_CryptoPro_XchA_ParamSet:
|
|
case NID_id_tc26_gost_3410_2012_256_paramSetB:
|
|
return point_mul_two_id_GostR3410_2001_CryptoPro_A_ParamSet(group, r, n, q, m, ctx);
|
|
case NID_id_GostR3410_2001_CryptoPro_B_ParamSet:
|
|
case NID_id_tc26_gost_3410_2012_256_paramSetC:
|
|
return point_mul_two_id_GostR3410_2001_CryptoPro_B_ParamSet(group, r, n, q, m, ctx);
|
|
case NID_id_GostR3410_2001_CryptoPro_C_ParamSet:
|
|
case NID_id_GostR3410_2001_CryptoPro_XchB_ParamSet:
|
|
case NID_id_tc26_gost_3410_2012_256_paramSetD:
|
|
return point_mul_two_id_GostR3410_2001_CryptoPro_C_ParamSet(group, r, n, q, m, ctx);
|
|
case NID_id_GostR3410_2001_TestParamSet:
|
|
return point_mul_two_id_GostR3410_2001_TestParamSet(group, r, n, q, m, ctx);
|
|
case NID_id_tc26_gost_3410_2012_256_paramSetA:
|
|
return point_mul_two_id_tc26_gost_3410_2012_256_paramSetA(group, r, n, q, m, ctx);
|
|
case NID_id_tc26_gost_3410_2012_512_paramSetA:
|
|
return point_mul_two_id_tc26_gost_3410_2012_512_paramSetA(group, r, n, q, m, ctx);
|
|
case NID_id_tc26_gost_3410_2012_512_paramSetB:
|
|
return point_mul_two_id_tc26_gost_3410_2012_512_paramSetB(group, r, n, q, m, ctx);
|
|
case NID_id_tc26_gost_3410_2012_512_paramSetC:
|
|
return point_mul_two_id_tc26_gost_3410_2012_512_paramSetC(group, r, n, q, m, ctx);
|
|
default:
|
|
return EC_POINT_mul(group, r, n, q, m, ctx);
|
|
}
|
|
} else if (n != NULL) {
|
|
/* mul g */
|
|
switch(EC_GROUP_get_curve_name(group)) {
|
|
case NID_id_GostR3410_2001_CryptoPro_A_ParamSet:
|
|
case NID_id_GostR3410_2001_CryptoPro_XchA_ParamSet:
|
|
case NID_id_tc26_gost_3410_2012_256_paramSetB:
|
|
return point_mul_g_id_GostR3410_2001_CryptoPro_A_ParamSet(group, r, n, ctx);
|
|
case NID_id_GostR3410_2001_CryptoPro_B_ParamSet:
|
|
case NID_id_tc26_gost_3410_2012_256_paramSetC:
|
|
return point_mul_g_id_GostR3410_2001_CryptoPro_B_ParamSet(group, r, n, ctx);
|
|
case NID_id_GostR3410_2001_CryptoPro_C_ParamSet:
|
|
case NID_id_GostR3410_2001_CryptoPro_XchB_ParamSet:
|
|
case NID_id_tc26_gost_3410_2012_256_paramSetD:
|
|
return point_mul_g_id_GostR3410_2001_CryptoPro_C_ParamSet(group, r, n, ctx);
|
|
case NID_id_GostR3410_2001_TestParamSet:
|
|
return point_mul_g_id_GostR3410_2001_TestParamSet(group, r, n, ctx);
|
|
case NID_id_tc26_gost_3410_2012_256_paramSetA:
|
|
return point_mul_g_id_tc26_gost_3410_2012_256_paramSetA(group, r, n, ctx);
|
|
case NID_id_tc26_gost_3410_2012_512_paramSetA:
|
|
return point_mul_g_id_tc26_gost_3410_2012_512_paramSetA(group, r, n, ctx);
|
|
case NID_id_tc26_gost_3410_2012_512_paramSetB:
|
|
return point_mul_g_id_tc26_gost_3410_2012_512_paramSetB(group, r, n, ctx);
|
|
case NID_id_tc26_gost_3410_2012_512_paramSetC:
|
|
return point_mul_g_id_tc26_gost_3410_2012_512_paramSetC(group, r, n, ctx);
|
|
default:
|
|
return EC_POINT_mul(group, r, n, q, m, ctx);
|
|
}
|
|
} else if (m != NULL) {
|
|
if (q == NULL)
|
|
return 0;
|
|
/* mul */
|
|
switch(EC_GROUP_get_curve_name(group)) {
|
|
case NID_id_GostR3410_2001_CryptoPro_A_ParamSet:
|
|
case NID_id_GostR3410_2001_CryptoPro_XchA_ParamSet:
|
|
case NID_id_tc26_gost_3410_2012_256_paramSetB:
|
|
return point_mul_id_GostR3410_2001_CryptoPro_A_ParamSet(group, r, q, m, ctx);
|
|
case NID_id_GostR3410_2001_CryptoPro_B_ParamSet:
|
|
case NID_id_tc26_gost_3410_2012_256_paramSetC:
|
|
return point_mul_id_GostR3410_2001_CryptoPro_B_ParamSet(group, r, q, m, ctx);
|
|
case NID_id_GostR3410_2001_CryptoPro_C_ParamSet:
|
|
case NID_id_GostR3410_2001_CryptoPro_XchB_ParamSet:
|
|
case NID_id_tc26_gost_3410_2012_256_paramSetD:
|
|
return point_mul_id_GostR3410_2001_CryptoPro_C_ParamSet(group, r, q, m, ctx);
|
|
case NID_id_GostR3410_2001_TestParamSet:
|
|
return point_mul_id_GostR3410_2001_TestParamSet(group, r, q, m, ctx);
|
|
case NID_id_tc26_gost_3410_2012_256_paramSetA:
|
|
return point_mul_id_tc26_gost_3410_2012_256_paramSetA(group, r, q, m, ctx);
|
|
case NID_id_tc26_gost_3410_2012_512_paramSetA:
|
|
return point_mul_id_tc26_gost_3410_2012_512_paramSetA(group, r, q, m, ctx);
|
|
case NID_id_tc26_gost_3410_2012_512_paramSetB:
|
|
return point_mul_id_tc26_gost_3410_2012_512_paramSetB(group, r, q, m, ctx);
|
|
case NID_id_tc26_gost_3410_2012_512_paramSetC:
|
|
return point_mul_id_tc26_gost_3410_2012_512_paramSetC(group, r, q, m, ctx);
|
|
default:
|
|
return EC_POINT_mul(group, r, n, q, m, ctx);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
*
|
|
* Generates GOST R 34.10-2001
|
|
* or GOST R 34.10-2012 keypair
|
|
*
|
|
*/
|
|
int gost_ec_keygen(EC_KEY *ec)
|
|
{
|
|
BIGNUM *order = NULL, *d = NULL;
|
|
const EC_GROUP *group = (ec) ? EC_KEY_get0_group(ec) : NULL;
|
|
int ok = 0;
|
|
|
|
if (!group) {
|
|
GOSTerr(GOST_F_GOST_EC_KEYGEN, ERR_R_INTERNAL_ERROR);
|
|
return 0;
|
|
}
|
|
|
|
order = BN_new();
|
|
d = BN_secure_new();
|
|
if (!order || !d) {
|
|
GOSTerr(GOST_F_GOST_EC_KEYGEN, ERR_R_MALLOC_FAILURE);
|
|
goto end;
|
|
}
|
|
|
|
if (!EC_GROUP_get_order(group, order, NULL)) {
|
|
GOSTerr(GOST_F_GOST_EC_KEYGEN, ERR_R_INTERNAL_ERROR);
|
|
goto end;
|
|
}
|
|
|
|
do {
|
|
if (!BN_rand_range(d, order)) {
|
|
GOSTerr(GOST_F_GOST_EC_KEYGEN, GOST_R_RNG_ERROR);
|
|
goto end;
|
|
}
|
|
}
|
|
while (BN_is_zero(d));
|
|
|
|
if (!EC_KEY_set_private_key(ec, d)) {
|
|
GOSTerr(GOST_F_GOST_EC_KEYGEN, ERR_R_INTERNAL_ERROR);
|
|
goto end;
|
|
}
|
|
|
|
ok = 1;
|
|
end:
|
|
if (d)
|
|
BN_free(d);
|
|
if (order)
|
|
BN_free(order);
|
|
|
|
return (ok) ? gost_ec_compute_public(ec) : 0;
|
|
}
|