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+/*
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is the elliptic curve math library for binary polynomial
+ * field curves.
+ *
+ * The Initial Developer of the Original Code is Sun Microsystems, Inc.
+ * Portions created by Sun Microsystems, Inc. are Copyright (C) 2003
+ * Sun Microsystems, Inc. All Rights Reserved.
+ *
+ * Contributor(s):
+ * Douglas Stebila <douglas@stebila.ca>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ */
+
+#ifndef __gf2m_ecl_h_
+#define __gf2m_ecl_h_
+#ifdef NSS_ENABLE_ECC
+
+#include "secmpi.h"
+
+/* Checks if point P(px, py) is at infinity. Uses affine coordinates. */
+mp_err GF2m_ec_pt_is_inf_aff(const mp_int *px, const mp_int *py);
+
+/* Sets P(px, py) to be the point at infinity. Uses affine coordinates. */
+mp_err GF2m_ec_pt_set_inf_aff(mp_int *px, mp_int *py);
+
+/* Computes R = P + Q where R is (rx, ry), P is (px, py) and Q is (qx, qy).
+ * Uses affine coordinates.
+ */
+mp_err GF2m_ec_pt_add_aff(const mp_int *pp, const mp_int *a,
+ const mp_int *px, const mp_int *py, const mp_int *qx, const mp_int *qy,
+ mp_int *rx, mp_int *ry);
+
+/* Computes R = P - Q. Uses affine coordinates. */
+mp_err GF2m_ec_pt_sub_aff(const mp_int *pp, const mp_int *a,
+ const mp_int *px, const mp_int *py, const mp_int *qx, const mp_int *qy,
+ mp_int *rx, mp_int *ry);
+
+/* Computes R = 2P. Uses affine coordinates. */
+mp_err GF2m_ec_pt_dbl_aff(const mp_int *pp, const mp_int *a,
+ const mp_int *px, const mp_int *py, mp_int *rx, mp_int *ry);
+
+/* Computes R = nP where R is (rx, ry) and P is (px, py). The parameters
+ * a, b and p are the elliptic curve coefficients and the irreducible that
+ * determines the field GF2m. Uses affine coordinates.
+ */
+mp_err GF2m_ec_pt_mul_aff(const mp_int *pp, const mp_int *a, const mp_int *b,
+ const mp_int *px, const mp_int *py, const mp_int *n,
+ mp_int *rx, mp_int *ry);
+
+/* Computes R = nP where R is (rx, ry) and P is (px, py). The parameters
+ * a, b and p are the elliptic curve coefficients and the irreducible that
+ * determines the field GF2m. Uses Montgomery projective coordinates.
+ */
+mp_err GF2m_ec_pt_mul_mont(const mp_int *pp, const mp_int *a,
+ const mp_int *b, const mp_int *px, const mp_int *py,
+ const mp_int *n, mp_int *rx, mp_int *ry);
+
+#define GF2m_ec_pt_is_inf(px, py) GF2m_ec_pt_is_inf_aff((px), (py))
+#define GF2m_ec_pt_add(p, a, px, py, qx, qy, rx, ry) \
+ GF2m_ec_pt_add_aff((p), (a), (px), (py), (qx), (qy), (rx), (ry))
+
+#define GF2m_ECL_MONTGOMERY
+#ifdef GF2m_ECL_AFFINE
+#define GF2m_ec_pt_mul(pp, a, b, px, py, n, rx, ry) \
+ GF2m_ec_pt_mul_aff((pp), (a), (b), (px), (py), (n), (rx), (ry))
+#elif defined(GF2m_ECL_MONTGOMERY)
+#define GF2m_ec_pt_mul(pp, a, b, px, py, n, rx, ry) \
+ GF2m_ec_pt_mul_mont((pp), (a), (b), (px), (py), (n), (rx), (ry))
+#endif /* GF2m_ECL_AFFINE or GF2m_ECL_MONTGOMERY */
+
+#endif /* NSS_ENABLE_ECC */
+#endif /* __gf2m_ecl_h_ */