1 /* 2 * ***** BEGIN LICENSE BLOCK ***** 3 * Version: MPL 1.1/GPL 2.0/LGPL 2.1 4 * 5 * The contents of this file are subject to the Mozilla Public License Version 6 * 1.1 (the "License"); you may not use this file except in compliance with 7 * the License. You may obtain a copy of the License at 8 * http://www.mozilla.org/MPL/ 9 * 10 * Software distributed under the License is distributed on an "AS IS" basis, 11 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License 12 * for the specific language governing rights and limitations under the 13 * License. 14 * 15 * The Original Code is the elliptic curve math library. 16 * 17 * The Initial Developer of the Original Code is 18 * Sun Microsystems, Inc. 19 * Portions created by the Initial Developer are Copyright (C) 2003 20 * the Initial Developer. All Rights Reserved. 21 * 22 * Contributor(s): 23 * Douglas Stebila <douglas@stebila.ca>, Sun Microsystems Laboratories 24 * 25 * Alternatively, the contents of this file may be used under the terms of 26 * either the GNU General Public License Version 2 or later (the "GPL"), or 27 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), 28 * in which case the provisions of the GPL or the LGPL are applicable instead 29 * of those above. If you wish to allow use of your version of this file only 30 * under the terms of either the GPL or the LGPL, and not to allow others to 31 * use your version of this file under the terms of the MPL, indicate your 32 * decision by deleting the provisions above and replace them with the notice 33 * and other provisions required by the GPL or the LGPL. If you do not delete 34 * the provisions above, a recipient may use your version of this file under 35 * the terms of any one of the MPL, the GPL or the LGPL. 36 * 37 * ***** END LICENSE BLOCK ***** */ 38 /* 39 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 40 * Use is subject to license terms. 41 * 42 * Sun elects to use this software under the MPL license. 43 */ 44 45 #ifndef _ECL_H 46 #define _ECL_H 47 48 /* Although this is not an exported header file, code which uses elliptic 49 * curve point operations will need to include it. */ 50 51 #include "ecl-exp.h" 52 #include "mpi.h" 53 54 struct ECGroupStr; 55 typedef struct ECGroupStr ECGroup; 56 57 /* Construct ECGroup from hexadecimal representations of parameters. */ 58 ECGroup *ECGroup_fromHex(const ECCurveParams * params, int kmflag); 59 60 /* Construct ECGroup from named parameters. */ 61 ECGroup *ECGroup_fromName(const ECCurveName name, int kmflag); 62 63 /* Free an allocated ECGroup. */ 64 void ECGroup_free(ECGroup *group); 65 66 /* Construct ECCurveParams from an ECCurveName */ 67 ECCurveParams *EC_GetNamedCurveParams(const ECCurveName name, int kmflag); 68 69 /* Duplicates an ECCurveParams */ 70 ECCurveParams *ECCurveParams_dup(const ECCurveParams * params, int kmflag); 71 72 /* Free an allocated ECCurveParams */ 73 void EC_FreeCurveParams(ECCurveParams * params); 74 75 /* Elliptic curve scalar-point multiplication. Computes Q(x, y) = k * P(x, 76 * y). If x, y = NULL, then P is assumed to be the generator (base point) 77 * of the group of points on the elliptic curve. Input and output values 78 * are assumed to be NOT field-encoded. */ 79 mp_err ECPoint_mul(const ECGroup *group, const mp_int *k, const mp_int *px, 80 const mp_int *py, mp_int *qx, mp_int *qy); 81 82 /* Elliptic curve scalar-point multiplication. Computes Q(x, y) = k1 * G + 83 * k2 * P(x, y), where G is the generator (base point) of the group of 84 * points on the elliptic curve. Input and output values are assumed to 85 * be NOT field-encoded. */ 86 mp_err ECPoints_mul(const ECGroup *group, const mp_int *k1, 87 const mp_int *k2, const mp_int *px, const mp_int *py, 88 mp_int *qx, mp_int *qy); 89 90 /* Validates an EC public key as described in Section 5.2.2 of X9.62. 91 * Returns MP_YES if the public key is valid, MP_NO if the public key 92 * is invalid, or an error code if the validation could not be 93 * performed. */ 94 mp_err ECPoint_validate(const ECGroup *group, const mp_int *px, const 95 mp_int *py); 96 97 #endif /* _ECL_H */ 98