xref: /titanic_51/usr/src/common/crypto/ecc/ec2.h (revision 37714ae43602c675f9dc59b070bfdf9fa702872c)
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 for binary polynomial field curves.
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 _EC2_H
46 #define _EC2_H
47 
48 #pragma ident	"%Z%%M%	%I%	%E% SMI"
49 
50 #include "ecl-priv.h"
51 
52 /* Checks if point P(px, py) is at infinity.  Uses affine coordinates. */
53 mp_err ec_GF2m_pt_is_inf_aff(const mp_int *px, const mp_int *py);
54 
55 /* Sets P(px, py) to be the point at infinity.  Uses affine coordinates. */
56 mp_err ec_GF2m_pt_set_inf_aff(mp_int *px, mp_int *py);
57 
58 /* Computes R = P + Q where R is (rx, ry), P is (px, py) and Q is (qx,
59  * qy). Uses affine coordinates. */
60 mp_err ec_GF2m_pt_add_aff(const mp_int *px, const mp_int *py,
61 						  const mp_int *qx, const mp_int *qy, mp_int *rx,
62 						  mp_int *ry, const ECGroup *group);
63 
64 /* Computes R = P - Q.  Uses affine coordinates. */
65 mp_err ec_GF2m_pt_sub_aff(const mp_int *px, const mp_int *py,
66 						  const mp_int *qx, const mp_int *qy, mp_int *rx,
67 						  mp_int *ry, const ECGroup *group);
68 
69 /* Computes R = 2P.  Uses affine coordinates. */
70 mp_err ec_GF2m_pt_dbl_aff(const mp_int *px, const mp_int *py, mp_int *rx,
71 						  mp_int *ry, const ECGroup *group);
72 
73 /* Validates a point on a GF2m curve. */
74 mp_err ec_GF2m_validate_point(const mp_int *px, const mp_int *py, const ECGroup *group);
75 
76 /* by default, this routine is unused and thus doesn't need to be compiled */
77 #ifdef ECL_ENABLE_GF2M_PT_MUL_AFF
78 /* Computes R = nP where R is (rx, ry) and P is (px, py). The parameters
79  * a, b and p are the elliptic curve coefficients and the irreducible that
80  * determines the field GF2m.  Uses affine coordinates. */
81 mp_err ec_GF2m_pt_mul_aff(const mp_int *n, const mp_int *px,
82 						  const mp_int *py, mp_int *rx, mp_int *ry,
83 						  const ECGroup *group);
84 #endif
85 
86 /* Computes R = nP where R is (rx, ry) and P is (px, py). The parameters
87  * a, b and p are the elliptic curve coefficients and the irreducible that
88  * determines the field GF2m.  Uses Montgomery projective coordinates. */
89 mp_err ec_GF2m_pt_mul_mont(const mp_int *n, const mp_int *px,
90 						   const mp_int *py, mp_int *rx, mp_int *ry,
91 						   const ECGroup *group);
92 
93 #ifdef ECL_ENABLE_GF2M_PROJ
94 /* Converts a point P(px, py) from affine coordinates to projective
95  * coordinates R(rx, ry, rz). */
96 mp_err ec_GF2m_pt_aff2proj(const mp_int *px, const mp_int *py, mp_int *rx,
97 						   mp_int *ry, mp_int *rz, const ECGroup *group);
98 
99 /* Converts a point P(px, py, pz) from projective coordinates to affine
100  * coordinates R(rx, ry). */
101 mp_err ec_GF2m_pt_proj2aff(const mp_int *px, const mp_int *py,
102 						   const mp_int *pz, mp_int *rx, mp_int *ry,
103 						   const ECGroup *group);
104 
105 /* Checks if point P(px, py, pz) is at infinity.  Uses projective
106  * coordinates. */
107 mp_err ec_GF2m_pt_is_inf_proj(const mp_int *px, const mp_int *py,
108 							  const mp_int *pz);
109 
110 /* Sets P(px, py, pz) to be the point at infinity.  Uses projective
111  * coordinates. */
112 mp_err ec_GF2m_pt_set_inf_proj(mp_int *px, mp_int *py, mp_int *pz);
113 
114 /* Computes R = P + Q where R is (rx, ry, rz), P is (px, py, pz) and Q is
115  * (qx, qy, qz).  Uses projective coordinates. */
116 mp_err ec_GF2m_pt_add_proj(const mp_int *px, const mp_int *py,
117 						   const mp_int *pz, const mp_int *qx,
118 						   const mp_int *qy, mp_int *rx, mp_int *ry,
119 						   mp_int *rz, const ECGroup *group);
120 
121 /* Computes R = 2P.  Uses projective coordinates. */
122 mp_err ec_GF2m_pt_dbl_proj(const mp_int *px, const mp_int *py,
123 						   const mp_int *pz, mp_int *rx, mp_int *ry,
124 						   mp_int *rz, const ECGroup *group);
125 
126 /* Computes R = nP where R is (rx, ry) and P is (px, py). The parameters
127  * a, b and p are the elliptic curve coefficients and the prime that
128  * determines the field GF2m.  Uses projective coordinates. */
129 mp_err ec_GF2m_pt_mul_proj(const mp_int *n, const mp_int *px,
130 						   const mp_int *py, mp_int *rx, mp_int *ry,
131 						   const ECGroup *group);
132 #endif
133 
134 #endif /* _EC2_H */
135