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: /* Although this is not an exported header file, code which uses elliptic
michael@0:  * curve point operations will need to include it. */
michael@0: 
michael@0: #ifndef __ecl_h_
michael@0: #define __ecl_h_
michael@0: 
michael@0: #include "ecl-exp.h"
michael@0: #include "mpi.h"
michael@0: 
michael@0: struct ECGroupStr;
michael@0: typedef struct ECGroupStr ECGroup;
michael@0: 
michael@0: /* Construct ECGroup from hexadecimal representations of parameters. */
michael@0: ECGroup *ECGroup_fromHex(const ECCurveParams * params);
michael@0: 
michael@0: /* Construct ECGroup from named parameters. */
michael@0: ECGroup *ECGroup_fromName(const ECCurveName name);
michael@0: 
michael@0: /* Free an allocated ECGroup. */
michael@0: void ECGroup_free(ECGroup *group);
michael@0: 
michael@0: /* Construct ECCurveParams from an ECCurveName */
michael@0: ECCurveParams *EC_GetNamedCurveParams(const ECCurveName name);
michael@0: 
michael@0: /* Duplicates an ECCurveParams */
michael@0: ECCurveParams *ECCurveParams_dup(const ECCurveParams * params);
michael@0: 
michael@0: /* Free an allocated ECCurveParams */
michael@0: void EC_FreeCurveParams(ECCurveParams * params);
michael@0: 
michael@0: /* Elliptic curve scalar-point multiplication. Computes Q(x, y) = k * P(x, 
michael@0:  * y).  If x, y = NULL, then P is assumed to be the generator (base point) 
michael@0:  * of the group of points on the elliptic curve. Input and output values
michael@0:  * are assumed to be NOT field-encoded. */
michael@0: mp_err ECPoint_mul(const ECGroup *group, const mp_int *k, const mp_int *px,
michael@0: 				   const mp_int *py, mp_int *qx, mp_int *qy);
michael@0: 
michael@0: /* Elliptic curve scalar-point multiplication. Computes Q(x, y) = k1 * G + 
michael@0:  * k2 * P(x, y), where G is the generator (base point) of the group of
michael@0:  * points on the elliptic curve. Input and output values are assumed to
michael@0:  * be NOT field-encoded. */
michael@0: mp_err ECPoints_mul(const ECGroup *group, const mp_int *k1,
michael@0: 					const mp_int *k2, const mp_int *px, const mp_int *py,
michael@0: 					mp_int *qx, mp_int *qy);
michael@0: 
michael@0: /* Validates an EC public key as described in Section 5.2.2 of X9.62.
michael@0:  * Returns MP_YES if the public key is valid, MP_NO if the public key
michael@0:  * is invalid, or an error code if the validation could not be
michael@0:  * performed. */
michael@0: mp_err ECPoint_validate(const ECGroup *group, const mp_int *px, const 
michael@0: 					mp_int *py);
michael@0: 
michael@0: #endif							/* __ecl_h_ */