michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include "ecl.h"
michael@0: #include "ecl-curve.h"
michael@0: #include "ecl-priv.h"
michael@0: #include <stdlib.h>
michael@0: #include <string.h>
michael@0: 
michael@0: #define CHECK(func) if ((func) == NULL) { res = 0; goto CLEANUP; }
michael@0: 
michael@0: /* Duplicates an ECCurveParams */
michael@0: ECCurveParams *
michael@0: ECCurveParams_dup(const ECCurveParams * params)
michael@0: {
michael@0: 	int res = 1;
michael@0: 	ECCurveParams *ret = NULL;
michael@0: 
michael@0: 	CHECK(ret = (ECCurveParams *) calloc(1, sizeof(ECCurveParams)));
michael@0: 	if (params->text != NULL) {
michael@0: 		CHECK(ret->text = strdup(params->text));
michael@0: 	}
michael@0: 	ret->field = params->field;
michael@0: 	ret->size = params->size;
michael@0: 	if (params->irr != NULL) {
michael@0: 		CHECK(ret->irr = strdup(params->irr));
michael@0: 	}
michael@0: 	if (params->curvea != NULL) {
michael@0: 		CHECK(ret->curvea = strdup(params->curvea));
michael@0: 	}
michael@0: 	if (params->curveb != NULL) {
michael@0: 		CHECK(ret->curveb = strdup(params->curveb));
michael@0: 	}
michael@0: 	if (params->genx != NULL) {
michael@0: 		CHECK(ret->genx = strdup(params->genx));
michael@0: 	}
michael@0: 	if (params->geny != NULL) {
michael@0: 		CHECK(ret->geny = strdup(params->geny));
michael@0: 	}
michael@0: 	if (params->order != NULL) {
michael@0: 		CHECK(ret->order = strdup(params->order));
michael@0: 	}
michael@0: 	ret->cofactor = params->cofactor;
michael@0: 
michael@0:   CLEANUP:
michael@0: 	if (res != 1) {
michael@0: 		EC_FreeCurveParams(ret);
michael@0: 		return NULL;
michael@0: 	}
michael@0: 	return ret;
michael@0: }
michael@0: 
michael@0: #undef CHECK
michael@0: 
michael@0: /* Construct ECCurveParams from an ECCurveName */
michael@0: ECCurveParams *
michael@0: EC_GetNamedCurveParams(const ECCurveName name)
michael@0: {
michael@0: 	if ((name <= ECCurve_noName) || (ECCurve_pastLastCurve <= name) ||
michael@0: 					(ecCurve_map[name] == NULL)) {
michael@0: 		return NULL;
michael@0: 	} else {
michael@0: 		return ECCurveParams_dup(ecCurve_map[name]);
michael@0: 	}
michael@0: }
michael@0: 
michael@0: /* Free the memory allocated (if any) to an ECCurveParams object. */
michael@0: void
michael@0: EC_FreeCurveParams(ECCurveParams * params)
michael@0: {
michael@0: 	if (params == NULL)
michael@0: 		return;
michael@0: 	if (params->text != NULL)
michael@0: 		free(params->text);
michael@0: 	if (params->irr != NULL)
michael@0: 		free(params->irr);
michael@0: 	if (params->curvea != NULL)
michael@0: 		free(params->curvea);
michael@0: 	if (params->curveb != NULL)
michael@0: 		free(params->curveb);
michael@0: 	if (params->genx != NULL)
michael@0: 		free(params->genx);
michael@0: 	if (params->geny != NULL)
michael@0: 		free(params->geny);
michael@0: 	if (params->order != NULL)
michael@0: 		free(params->order);
michael@0: 	free(params);
michael@0: }