author | ohair |
Wed, 06 Apr 2011 22:06:11 -0700 | |
changeset 9035 | 1255eb81cc2f |
parent 8175 | 27e80dc06104 |
child 9774 | 50a2b28ca54c |
permissions | -rw-r--r-- |
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/* ********************************************************************* |
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* |
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* Sun elects to have this file available under and governed by the |
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* Mozilla Public License Version 1.1 ("MPL") (see |
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* http://www.mozilla.org/MPL/ for full license text). For the avoidance |
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* of doubt and subject to the following, Sun also elects to allow |
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* licensees to use this file under the MPL, the GNU General Public |
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* License version 2 only or the Lesser General Public License version |
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* 2.1 only. Any references to the "GNU General Public License version 2 |
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* or later" or "GPL" in the following shall be construed to mean the |
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* GNU General Public License version 2 only. Any references to the "GNU |
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* Lesser General Public License version 2.1 or later" or "LGPL" in the |
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* following shall be construed to mean the GNU Lesser General Public |
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* License version 2.1 only. However, the following notice accompanied |
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* the original version of this file: |
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* |
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1 |
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* |
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* The contents of this file are subject to the Mozilla Public License Version |
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* 1.1 (the "License"); you may not use this file except in compliance with |
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* the License. You may obtain a copy of the License at |
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* http://www.mozilla.org/MPL/ |
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* |
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* Software distributed under the License is distributed on an "AS IS" basis, |
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License |
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* for the specific language governing rights and limitations under the |
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* License. |
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* |
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* The Original Code is the elliptic curve math library for prime field curves. |
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* |
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* The Initial Developer of the Original Code is |
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* Sun Microsystems, Inc. |
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* Portions created by the Initial Developer are Copyright (C) 2003 |
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* the Initial Developer. All Rights Reserved. |
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* |
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* Contributor(s): |
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* Douglas Stebila <douglas@stebila.ca> |
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* |
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* Alternatively, the contents of this file may be used under the terms of |
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* either the GNU General Public License Version 2 or later (the "GPL"), or |
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), |
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* in which case the provisions of the GPL or the LGPL are applicable instead |
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* of those above. If you wish to allow use of your version of this file only |
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* under the terms of either the GPL or the LGPL, and not to allow others to |
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* use your version of this file under the terms of the MPL, indicate your |
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* decision by deleting the provisions above and replace them with the notice |
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* and other provisions required by the GPL or the LGPL. If you do not delete |
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* the provisions above, a recipient may use your version of this file under |
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* the terms of any one of the MPL, the GPL or the LGPL. |
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* |
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*********************************************************************** */ |
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/* |
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* Copyright (c) 2007, 2011, Oracle and/or its affiliates. All rights reserved. |
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* Use is subject to license terms. |
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*/ |
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|
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#include "ecp.h" |
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#include "mpi.h" |
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#include "mplogic.h" |
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#include "mpi-priv.h" |
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#ifndef _KERNEL |
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#include <stdlib.h> |
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#endif |
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|
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/* Fast modular reduction for p384 = 2^384 - 2^128 - 2^96 + 2^32 - 1. a can be r. |
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* Uses algorithm 2.30 from Hankerson, Menezes, Vanstone. Guide to |
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* Elliptic Curve Cryptography. */ |
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mp_err |
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ec_GFp_nistp384_mod(const mp_int *a, mp_int *r, const GFMethod *meth) |
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{ |
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mp_err res = MP_OKAY; |
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int a_bits = mpl_significant_bits(a); |
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int i; |
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|
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/* m1, m2 are statically-allocated mp_int of exactly the size we need */ |
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mp_int m[10]; |
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|
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#ifdef ECL_THIRTY_TWO_BIT |
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mp_digit s[10][12]; |
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for (i = 0; i < 10; i++) { |
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MP_SIGN(&m[i]) = MP_ZPOS; |
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MP_ALLOC(&m[i]) = 12; |
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MP_USED(&m[i]) = 12; |
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MP_DIGITS(&m[i]) = s[i]; |
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} |
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#else |
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mp_digit s[10][6]; |
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for (i = 0; i < 10; i++) { |
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MP_SIGN(&m[i]) = MP_ZPOS; |
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MP_ALLOC(&m[i]) = 6; |
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MP_USED(&m[i]) = 6; |
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MP_DIGITS(&m[i]) = s[i]; |
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} |
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#endif |
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|
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#ifdef ECL_THIRTY_TWO_BIT |
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/* for polynomials larger than twice the field size or polynomials |
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* not using all words, use regular reduction */ |
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if ((a_bits > 768) || (a_bits <= 736)) { |
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MP_CHECKOK(mp_mod(a, &meth->irr, r)); |
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} else { |
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for (i = 0; i < 12; i++) { |
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s[0][i] = MP_DIGIT(a, i); |
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} |
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s[1][0] = 0; |
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s[1][1] = 0; |
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s[1][2] = 0; |
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s[1][3] = 0; |
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s[1][4] = MP_DIGIT(a, 21); |
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s[1][5] = MP_DIGIT(a, 22); |
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6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
111 |
s[1][6] = MP_DIGIT(a, 23); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
112 |
s[1][7] = 0; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
113 |
s[1][8] = 0; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
114 |
s[1][9] = 0; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
115 |
s[1][10] = 0; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
116 |
s[1][11] = 0; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
117 |
for (i = 0; i < 12; i++) { |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
118 |
s[2][i] = MP_DIGIT(a, i+12); |
8e0f58b1c072
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vinnie
parents:
diff
changeset
|
119 |
} |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
120 |
s[3][0] = MP_DIGIT(a, 21); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
121 |
s[3][1] = MP_DIGIT(a, 22); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
122 |
s[3][2] = MP_DIGIT(a, 23); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
123 |
for (i = 3; i < 12; i++) { |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
124 |
s[3][i] = MP_DIGIT(a, i+9); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
125 |
} |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
126 |
s[4][0] = 0; |
8e0f58b1c072
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vinnie
parents:
diff
changeset
|
127 |
s[4][1] = MP_DIGIT(a, 23); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
128 |
s[4][2] = 0; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
129 |
s[4][3] = MP_DIGIT(a, 20); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
130 |
for (i = 4; i < 12; i++) { |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
131 |
s[4][i] = MP_DIGIT(a, i+8); |
8e0f58b1c072
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vinnie
parents:
diff
changeset
|
132 |
} |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
133 |
s[5][0] = 0; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
134 |
s[5][1] = 0; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
135 |
s[5][2] = 0; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
136 |
s[5][3] = 0; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
137 |
s[5][4] = MP_DIGIT(a, 20); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
138 |
s[5][5] = MP_DIGIT(a, 21); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
139 |
s[5][6] = MP_DIGIT(a, 22); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
140 |
s[5][7] = MP_DIGIT(a, 23); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
141 |
s[5][8] = 0; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
142 |
s[5][9] = 0; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
143 |
s[5][10] = 0; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
144 |
s[5][11] = 0; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
145 |
s[6][0] = MP_DIGIT(a, 20); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
146 |
s[6][1] = 0; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
147 |
s[6][2] = 0; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
148 |
s[6][3] = MP_DIGIT(a, 21); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
149 |
s[6][4] = MP_DIGIT(a, 22); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
150 |
s[6][5] = MP_DIGIT(a, 23); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
151 |
s[6][6] = 0; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
152 |
s[6][7] = 0; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
153 |
s[6][8] = 0; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
154 |
s[6][9] = 0; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
155 |
s[6][10] = 0; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
156 |
s[6][11] = 0; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
157 |
s[7][0] = MP_DIGIT(a, 23); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
158 |
for (i = 1; i < 12; i++) { |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
159 |
s[7][i] = MP_DIGIT(a, i+11); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
160 |
} |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
161 |
s[8][0] = 0; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
162 |
s[8][1] = MP_DIGIT(a, 20); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
163 |
s[8][2] = MP_DIGIT(a, 21); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
164 |
s[8][3] = MP_DIGIT(a, 22); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
165 |
s[8][4] = MP_DIGIT(a, 23); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
166 |
s[8][5] = 0; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
167 |
s[8][6] = 0; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
168 |
s[8][7] = 0; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
169 |
s[8][8] = 0; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
170 |
s[8][9] = 0; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
171 |
s[8][10] = 0; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
172 |
s[8][11] = 0; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
173 |
s[9][0] = 0; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
174 |
s[9][1] = 0; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
175 |
s[9][2] = 0; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
176 |
s[9][3] = MP_DIGIT(a, 23); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
177 |
s[9][4] = MP_DIGIT(a, 23); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
178 |
s[9][5] = 0; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
179 |
s[9][6] = 0; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
180 |
s[9][7] = 0; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
181 |
s[9][8] = 0; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
182 |
s[9][9] = 0; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
183 |
s[9][10] = 0; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
184 |
s[9][11] = 0; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
185 |
|
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
186 |
MP_CHECKOK(mp_add(&m[0], &m[1], r)); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
187 |
MP_CHECKOK(mp_add(r, &m[1], r)); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
188 |
MP_CHECKOK(mp_add(r, &m[2], r)); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
189 |
MP_CHECKOK(mp_add(r, &m[3], r)); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
190 |
MP_CHECKOK(mp_add(r, &m[4], r)); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
191 |
MP_CHECKOK(mp_add(r, &m[5], r)); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
192 |
MP_CHECKOK(mp_add(r, &m[6], r)); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
193 |
MP_CHECKOK(mp_sub(r, &m[7], r)); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
194 |
MP_CHECKOK(mp_sub(r, &m[8], r)); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
195 |
MP_CHECKOK(mp_submod(r, &m[9], &meth->irr, r)); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
196 |
s_mp_clamp(r); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
197 |
} |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
198 |
#else |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
199 |
/* for polynomials larger than twice the field size or polynomials |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
200 |
* not using all words, use regular reduction */ |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
201 |
if ((a_bits > 768) || (a_bits <= 736)) { |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
202 |
MP_CHECKOK(mp_mod(a, &meth->irr, r)); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
203 |
} else { |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
204 |
for (i = 0; i < 6; i++) { |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
205 |
s[0][i] = MP_DIGIT(a, i); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
206 |
} |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
207 |
s[1][0] = 0; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
208 |
s[1][1] = 0; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
209 |
s[1][2] = (MP_DIGIT(a, 10) >> 32) | (MP_DIGIT(a, 11) << 32); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
210 |
s[1][3] = MP_DIGIT(a, 11) >> 32; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
211 |
s[1][4] = 0; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
212 |
s[1][5] = 0; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
213 |
for (i = 0; i < 6; i++) { |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
214 |
s[2][i] = MP_DIGIT(a, i+6); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
215 |
} |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
216 |
s[3][0] = (MP_DIGIT(a, 10) >> 32) | (MP_DIGIT(a, 11) << 32); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
217 |
s[3][1] = (MP_DIGIT(a, 11) >> 32) | (MP_DIGIT(a, 6) << 32); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
218 |
for (i = 2; i < 6; i++) { |
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219 |
s[3][i] = (MP_DIGIT(a, i+4) >> 32) | (MP_DIGIT(a, i+5) << 32); |
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220 |
} |
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221 |
s[4][0] = (MP_DIGIT(a, 11) >> 32) << 32; |
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222 |
s[4][1] = MP_DIGIT(a, 10) << 32; |
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223 |
for (i = 2; i < 6; i++) { |
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224 |
s[4][i] = MP_DIGIT(a, i+4); |
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225 |
} |
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226 |
s[5][0] = 0; |
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227 |
s[5][1] = 0; |
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228 |
s[5][2] = MP_DIGIT(a, 10); |
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229 |
s[5][3] = MP_DIGIT(a, 11); |
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230 |
s[5][4] = 0; |
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|
231 |
s[5][5] = 0; |
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|
232 |
s[6][0] = (MP_DIGIT(a, 10) << 32) >> 32; |
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|
233 |
s[6][1] = (MP_DIGIT(a, 10) >> 32) << 32; |
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|
234 |
s[6][2] = MP_DIGIT(a, 11); |
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|
235 |
s[6][3] = 0; |
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|
236 |
s[6][4] = 0; |
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|
237 |
s[6][5] = 0; |
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|
238 |
s[7][0] = (MP_DIGIT(a, 11) >> 32) | (MP_DIGIT(a, 6) << 32); |
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|
239 |
for (i = 1; i < 6; i++) { |
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|
240 |
s[7][i] = (MP_DIGIT(a, i+5) >> 32) | (MP_DIGIT(a, i+6) << 32); |
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|
241 |
} |
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|
242 |
s[8][0] = MP_DIGIT(a, 10) << 32; |
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|
243 |
s[8][1] = (MP_DIGIT(a, 10) >> 32) | (MP_DIGIT(a, 11) << 32); |
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|
244 |
s[8][2] = MP_DIGIT(a, 11) >> 32; |
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|
245 |
s[8][3] = 0; |
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|
246 |
s[8][4] = 0; |
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|
247 |
s[8][5] = 0; |
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|
248 |
s[9][0] = 0; |
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|
249 |
s[9][1] = (MP_DIGIT(a, 11) >> 32) << 32; |
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|
250 |
s[9][2] = MP_DIGIT(a, 11) >> 32; |
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|
251 |
s[9][3] = 0; |
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252 |
s[9][4] = 0; |
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|
253 |
s[9][5] = 0; |
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|
254 |
|
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|
255 |
MP_CHECKOK(mp_add(&m[0], &m[1], r)); |
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|
256 |
MP_CHECKOK(mp_add(r, &m[1], r)); |
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|
257 |
MP_CHECKOK(mp_add(r, &m[2], r)); |
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|
258 |
MP_CHECKOK(mp_add(r, &m[3], r)); |
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|
259 |
MP_CHECKOK(mp_add(r, &m[4], r)); |
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|
260 |
MP_CHECKOK(mp_add(r, &m[5], r)); |
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|
261 |
MP_CHECKOK(mp_add(r, &m[6], r)); |
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|
262 |
MP_CHECKOK(mp_sub(r, &m[7], r)); |
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|
263 |
MP_CHECKOK(mp_sub(r, &m[8], r)); |
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parents:
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|
264 |
MP_CHECKOK(mp_submod(r, &m[9], &meth->irr, r)); |
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|
265 |
s_mp_clamp(r); |
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|
266 |
} |
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|
267 |
#endif |
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|
268 |
|
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|
269 |
CLEANUP: |
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|
270 |
return res; |
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|
271 |
} |
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|
272 |
|
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|
273 |
/* Compute the square of polynomial a, reduce modulo p384. Store the |
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|
274 |
* result in r. r could be a. Uses optimized modular reduction for p384. |
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275 |
*/ |
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276 |
mp_err |
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|
277 |
ec_GFp_nistp384_sqr(const mp_int *a, mp_int *r, const GFMethod *meth) |
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|
278 |
{ |
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|
279 |
mp_err res = MP_OKAY; |
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|
280 |
|
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|
281 |
MP_CHECKOK(mp_sqr(a, r)); |
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|
282 |
MP_CHECKOK(ec_GFp_nistp384_mod(r, r, meth)); |
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|
283 |
CLEANUP: |
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|
284 |
return res; |
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|
285 |
} |
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|
286 |
|
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|
287 |
/* Compute the product of two polynomials a and b, reduce modulo p384. |
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|
288 |
* Store the result in r. r could be a or b; a could be b. Uses |
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|
289 |
* optimized modular reduction for p384. */ |
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|
290 |
mp_err |
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|
291 |
ec_GFp_nistp384_mul(const mp_int *a, const mp_int *b, mp_int *r, |
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|
292 |
const GFMethod *meth) |
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|
293 |
{ |
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|
294 |
mp_err res = MP_OKAY; |
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|
295 |
|
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parents:
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|
296 |
MP_CHECKOK(mp_mul(a, b, r)); |
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vinnie
parents:
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|
297 |
MP_CHECKOK(ec_GFp_nistp384_mod(r, r, meth)); |
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|
298 |
CLEANUP: |
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|
299 |
return res; |
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parents:
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|
300 |
} |
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parents:
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|
301 |
|
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|
302 |
/* Wire in fast field arithmetic and precomputation of base point for |
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|
303 |
* named curves. */ |
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|
304 |
mp_err |
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vinnie
parents:
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|
305 |
ec_group_set_gfp384(ECGroup *group, ECCurveName name) |
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vinnie
parents:
diff
changeset
|
306 |
{ |
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vinnie
parents:
diff
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|
307 |
if (name == ECCurve_NIST_P384) { |
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vinnie
parents:
diff
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|
308 |
group->meth->field_mod = &ec_GFp_nistp384_mod; |
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vinnie
parents:
diff
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|
309 |
group->meth->field_mul = &ec_GFp_nistp384_mul; |
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vinnie
parents:
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|
310 |
group->meth->field_sqr = &ec_GFp_nistp384_sqr; |
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vinnie
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|
311 |
} |
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parents:
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|
312 |
return MP_OKAY; |
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|
313 |
} |