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>, Sun Microsystems Laboratories |
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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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#define ECP192_DIGITS ECL_CURVE_DIGITS(192) |
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|
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/* Fast modular reduction for p192 = 2^192 - 2^64 - 1. a can be r. Uses |
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* algorithm 7 from Brown, Hankerson, Lopez, Menezes. Software |
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* Implementation of the NIST Elliptic Curves over Prime Fields. */ |
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mp_err |
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ec_GFp_nistp192_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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mp_size a_used = MP_USED(a); |
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mp_digit r3; |
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#ifndef MPI_AMD64_ADD |
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mp_digit carry; |
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#endif |
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#ifdef ECL_THIRTY_TWO_BIT |
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mp_digit a5a = 0, a5b = 0, a4a = 0, a4b = 0, a3a = 0, a3b = 0; |
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mp_digit r0a, r0b, r1a, r1b, r2a, r2b; |
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#else |
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mp_digit a5 = 0, a4 = 0, a3 = 0; |
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mp_digit r0, r1, r2; |
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#endif |
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|
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/* reduction not needed if a is not larger than field size */ |
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if (a_used < ECP192_DIGITS) { |
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if (a == r) { |
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return MP_OKAY; |
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} |
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return mp_copy(a, r); |
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} |
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|
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/* for polynomials larger than twice the field size, use regular |
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* reduction */ |
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if (a_used > ECP192_DIGITS*2) { |
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MP_CHECKOK(mp_mod(a, &meth->irr, r)); |
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} else { |
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/* copy out upper words of a */ |
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|
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#ifdef ECL_THIRTY_TWO_BIT |
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|
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/* in all the math below, |
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* nXb is most signifiant, nXa is least significant */ |
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switch (a_used) { |
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case 12: |
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a5b = MP_DIGIT(a, 11); |
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case 11: |
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a5a = MP_DIGIT(a, 10); |
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|
111 |
case 10: |
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|
112 |
a4b = MP_DIGIT(a, 9); |
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parents:
diff
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|
113 |
case 9: |
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|
114 |
a4a = MP_DIGIT(a, 8); |
8e0f58b1c072
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parents:
diff
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|
115 |
case 8: |
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|
116 |
a3b = MP_DIGIT(a, 7); |
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|
117 |
case 7: |
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|
118 |
a3a = MP_DIGIT(a, 6); |
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|
119 |
} |
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|
120 |
|
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parents:
diff
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|
121 |
|
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diff
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|
122 |
r2b= MP_DIGIT(a, 5); |
8e0f58b1c072
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|
123 |
r2a= MP_DIGIT(a, 4); |
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|
124 |
r1b = MP_DIGIT(a, 3); |
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|
125 |
r1a = MP_DIGIT(a, 2); |
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|
126 |
r0b = MP_DIGIT(a, 1); |
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|
127 |
r0a = MP_DIGIT(a, 0); |
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|
128 |
|
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|
129 |
/* implement r = (a2,a1,a0)+(a5,a5,a5)+(a4,a4,0)+(0,a3,a3) */ |
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|
130 |
MP_ADD_CARRY(r0a, a3a, r0a, 0, carry); |
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|
131 |
MP_ADD_CARRY(r0b, a3b, r0b, carry, carry); |
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|
132 |
MP_ADD_CARRY(r1a, a3a, r1a, carry, carry); |
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|
133 |
MP_ADD_CARRY(r1b, a3b, r1b, carry, carry); |
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|
134 |
MP_ADD_CARRY(r2a, a4a, r2a, carry, carry); |
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|
135 |
MP_ADD_CARRY(r2b, a4b, r2b, carry, carry); |
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|
136 |
r3 = carry; carry = 0; |
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|
137 |
MP_ADD_CARRY(r0a, a5a, r0a, 0, carry); |
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diff
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|
138 |
MP_ADD_CARRY(r0b, a5b, r0b, carry, carry); |
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|
139 |
MP_ADD_CARRY(r1a, a5a, r1a, carry, carry); |
8e0f58b1c072
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parents:
diff
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|
140 |
MP_ADD_CARRY(r1b, a5b, r1b, carry, carry); |
8e0f58b1c072
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vinnie
parents:
diff
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|
141 |
MP_ADD_CARRY(r2a, a5a, r2a, carry, carry); |
8e0f58b1c072
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parents:
diff
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|
142 |
MP_ADD_CARRY(r2b, a5b, r2b, carry, carry); |
8e0f58b1c072
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|
143 |
r3 += carry; |
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|
144 |
MP_ADD_CARRY(r1a, a4a, r1a, 0, carry); |
8e0f58b1c072
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vinnie
parents:
diff
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|
145 |
MP_ADD_CARRY(r1b, a4b, r1b, carry, carry); |
8e0f58b1c072
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vinnie
parents:
diff
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|
146 |
MP_ADD_CARRY(r2a, 0, r2a, carry, carry); |
8e0f58b1c072
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parents:
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|
147 |
MP_ADD_CARRY(r2b, 0, r2b, carry, carry); |
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|
148 |
r3 += carry; |
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|
149 |
|
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|
150 |
/* reduce out the carry */ |
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|
151 |
while (r3) { |
8e0f58b1c072
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|
152 |
MP_ADD_CARRY(r0a, r3, r0a, 0, carry); |
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|
153 |
MP_ADD_CARRY(r0b, 0, r0b, carry, carry); |
8e0f58b1c072
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parents:
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|
154 |
MP_ADD_CARRY(r1a, r3, r1a, carry, carry); |
8e0f58b1c072
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vinnie
parents:
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|
155 |
MP_ADD_CARRY(r1b, 0, r1b, carry, carry); |
8e0f58b1c072
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vinnie
parents:
diff
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|
156 |
MP_ADD_CARRY(r2a, 0, r2a, carry, carry); |
8e0f58b1c072
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vinnie
parents:
diff
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|
157 |
MP_ADD_CARRY(r2b, 0, r2b, carry, carry); |
8e0f58b1c072
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vinnie
parents:
diff
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|
158 |
r3 = carry; |
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parents:
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|
159 |
} |
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parents:
diff
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|
160 |
|
8e0f58b1c072
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parents:
diff
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|
161 |
/* check for final reduction */ |
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|
162 |
/* |
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parents:
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|
163 |
* our field is 0xffffffffffffffff, 0xfffffffffffffffe, |
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|
164 |
* 0xffffffffffffffff. That means we can only be over and need |
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|
165 |
* one more reduction |
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|
166 |
* if r2 == 0xffffffffffffffffff (same as r2+1 == 0) |
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|
167 |
* and |
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|
168 |
* r1 == 0xffffffffffffffffff or |
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|
169 |
* r1 == 0xfffffffffffffffffe and r0 = 0xfffffffffffffffff |
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parents:
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|
170 |
* In all cases, we subtract the field (or add the 2's |
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parents:
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|
171 |
* complement value (1,1,0)). (r0, r1, r2) |
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|
172 |
*/ |
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vinnie
parents:
diff
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|
173 |
if (((r2b == 0xffffffff) && (r2a == 0xffffffff) |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
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|
174 |
&& (r1b == 0xffffffff) ) && |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
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|
175 |
((r1a == 0xffffffff) || |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
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|
176 |
(r1a == 0xfffffffe) && (r0a == 0xffffffff) && |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
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|
177 |
(r0b == 0xffffffff)) ) { |
8e0f58b1c072
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vinnie
parents:
diff
changeset
|
178 |
/* do a quick subtract */ |
8e0f58b1c072
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vinnie
parents:
diff
changeset
|
179 |
MP_ADD_CARRY(r0a, 1, r0a, 0, carry); |
8e0f58b1c072
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vinnie
parents:
diff
changeset
|
180 |
r0b += carry; |
8e0f58b1c072
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parents:
diff
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|
181 |
r1a = r1b = r2a = r2b = 0; |
8e0f58b1c072
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vinnie
parents:
diff
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|
182 |
} |
8e0f58b1c072
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vinnie
parents:
diff
changeset
|
183 |
|
8e0f58b1c072
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vinnie
parents:
diff
changeset
|
184 |
/* set the lower words of r */ |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
185 |
if (a != r) { |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
186 |
MP_CHECKOK(s_mp_pad(r, 6)); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
187 |
} |
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6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
188 |
MP_DIGIT(r, 5) = r2b; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
189 |
MP_DIGIT(r, 4) = r2a; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
190 |
MP_DIGIT(r, 3) = r1b; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
191 |
MP_DIGIT(r, 2) = r1a; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
192 |
MP_DIGIT(r, 1) = r0b; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
193 |
MP_DIGIT(r, 0) = r0a; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
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|
194 |
MP_USED(r) = 6; |
8e0f58b1c072
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vinnie
parents:
diff
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|
195 |
#else |
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vinnie
parents:
diff
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|
196 |
switch (a_used) { |
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parents:
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|
197 |
case 6: |
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vinnie
parents:
diff
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|
198 |
a5 = MP_DIGIT(a, 5); |
8e0f58b1c072
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parents:
diff
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|
199 |
case 5: |
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parents:
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|
200 |
a4 = MP_DIGIT(a, 4); |
8e0f58b1c072
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vinnie
parents:
diff
changeset
|
201 |
case 4: |
8e0f58b1c072
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vinnie
parents:
diff
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|
202 |
a3 = MP_DIGIT(a, 3); |
8e0f58b1c072
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vinnie
parents:
diff
changeset
|
203 |
} |
8e0f58b1c072
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vinnie
parents:
diff
changeset
|
204 |
|
8e0f58b1c072
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vinnie
parents:
diff
changeset
|
205 |
r2 = MP_DIGIT(a, 2); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
206 |
r1 = MP_DIGIT(a, 1); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
207 |
r0 = MP_DIGIT(a, 0); |
8e0f58b1c072
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vinnie
parents:
diff
changeset
|
208 |
|
8e0f58b1c072
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vinnie
parents:
diff
changeset
|
209 |
/* implement r = (a2,a1,a0)+(a5,a5,a5)+(a4,a4,0)+(0,a3,a3) */ |
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|
210 |
#ifndef MPI_AMD64_ADD |
8175
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diff
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|
211 |
MP_ADD_CARRY_ZERO(r0, a3, r0, carry); |
3863
8e0f58b1c072
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vinnie
parents:
diff
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|
212 |
MP_ADD_CARRY(r1, a3, r1, carry, carry); |
8e0f58b1c072
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vinnie
parents:
diff
changeset
|
213 |
MP_ADD_CARRY(r2, a4, r2, carry, carry); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
214 |
r3 = carry; |
8175
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vinnie
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diff
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|
215 |
MP_ADD_CARRY_ZERO(r0, a5, r0, carry); |
3863
8e0f58b1c072
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vinnie
parents:
diff
changeset
|
216 |
MP_ADD_CARRY(r1, a5, r1, carry, carry); |
8e0f58b1c072
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vinnie
parents:
diff
changeset
|
217 |
MP_ADD_CARRY(r2, a5, r2, carry, carry); |
8e0f58b1c072
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vinnie
parents:
diff
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|
218 |
r3 += carry; |
8175
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|
219 |
MP_ADD_CARRY_ZERO(r1, a4, r1, carry); |
3863
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220 |
MP_ADD_CARRY(r2, 0, r2, carry, carry); |
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221 |
r3 += carry; |
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222 |
|
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223 |
#else |
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224 |
r2 = MP_DIGIT(a, 2); |
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225 |
r1 = MP_DIGIT(a, 1); |
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226 |
r0 = MP_DIGIT(a, 0); |
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227 |
|
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228 |
/* set the lower words of r */ |
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229 |
__asm__ ( |
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230 |
"xorq %3,%3 \n\t" |
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231 |
"addq %4,%0 \n\t" |
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232 |
"adcq %4,%1 \n\t" |
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233 |
"adcq %5,%2 \n\t" |
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234 |
"adcq $0,%3 \n\t" |
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235 |
"addq %6,%0 \n\t" |
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236 |
"adcq %6,%1 \n\t" |
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237 |
"adcq %6,%2 \n\t" |
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238 |
"adcq $0,%3 \n\t" |
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239 |
"addq %5,%1 \n\t" |
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240 |
"adcq $0,%2 \n\t" |
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241 |
"adcq $0,%3 \n\t" |
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242 |
: "=r"(r0), "=r"(r1), "=r"(r2), "=r"(r3), "=r"(a3), |
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243 |
"=r"(a4), "=r"(a5) |
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244 |
: "0" (r0), "1" (r1), "2" (r2), "3" (r3), |
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245 |
"4" (a3), "5" (a4), "6"(a5) |
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246 |
: "%cc" ); |
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247 |
#endif |
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248 |
|
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249 |
/* reduce out the carry */ |
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|
250 |
while (r3) { |
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251 |
#ifndef MPI_AMD64_ADD |
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252 |
MP_ADD_CARRY_ZERO(r0, r3, r0, carry); |
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253 |
MP_ADD_CARRY(r1, r3, r1, carry, carry); |
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254 |
MP_ADD_CARRY(r2, 0, r2, carry, carry); |
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255 |
r3 = carry; |
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256 |
#else |
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257 |
a3=r3; |
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258 |
__asm__ ( |
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|
259 |
"xorq %3,%3 \n\t" |
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|
260 |
"addq %4,%0 \n\t" |
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|
261 |
"adcq %4,%1 \n\t" |
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|
262 |
"adcq $0,%2 \n\t" |
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|
263 |
"adcq $0,%3 \n\t" |
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264 |
: "=r"(r0), "=r"(r1), "=r"(r2), "=r"(r3), "=r"(a3) |
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265 |
: "0" (r0), "1" (r1), "2" (r2), "3" (r3), "4"(a3) |
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266 |
: "%cc" ); |
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|
267 |
#endif |
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268 |
} |
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|
269 |
|
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270 |
/* check for final reduction */ |
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271 |
/* |
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272 |
* our field is 0xffffffffffffffff, 0xfffffffffffffffe, |
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273 |
* 0xffffffffffffffff. That means we can only be over and need |
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274 |
* one more reduction |
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275 |
* if r2 == 0xffffffffffffffffff (same as r2+1 == 0) |
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276 |
* and |
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277 |
* r1 == 0xffffffffffffffffff or |
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278 |
* r1 == 0xfffffffffffffffffe and r0 = 0xfffffffffffffffff |
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279 |
* In all cases, we subtract the field (or add the 2's |
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280 |
* complement value (1,1,0)). (r0, r1, r2) |
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281 |
*/ |
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|
282 |
if (r3 || ((r2 == MP_DIGIT_MAX) && |
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|
283 |
((r1 == MP_DIGIT_MAX) || |
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|
284 |
((r1 == (MP_DIGIT_MAX-1)) && (r0 == MP_DIGIT_MAX))))) { |
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|
285 |
/* do a quick subtract */ |
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|
286 |
r0++; |
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|
287 |
r1 = r2 = 0; |
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|
288 |
} |
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|
289 |
/* set the lower words of r */ |
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|
290 |
if (a != r) { |
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|
291 |
MP_CHECKOK(s_mp_pad(r, 3)); |
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|
292 |
} |
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|
293 |
MP_DIGIT(r, 2) = r2; |
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|
294 |
MP_DIGIT(r, 1) = r1; |
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295 |
MP_DIGIT(r, 0) = r0; |
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|
296 |
MP_USED(r) = 3; |
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|
297 |
#endif |
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|
298 |
} |
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|
299 |
|
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|
300 |
CLEANUP: |
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|
301 |
return res; |
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|
302 |
} |
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|
303 |
|
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|
304 |
#ifndef ECL_THIRTY_TWO_BIT |
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|
305 |
/* Compute the sum of 192 bit curves. Do the work in-line since the |
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|
306 |
* number of words are so small, we don't want to overhead of mp function |
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|
307 |
* calls. Uses optimized modular reduction for p192. |
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|
308 |
*/ |
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|
309 |
mp_err |
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|
310 |
ec_GFp_nistp192_add(const mp_int *a, const mp_int *b, mp_int *r, |
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|
311 |
const GFMethod *meth) |
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|
312 |
{ |
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|
313 |
mp_err res = MP_OKAY; |
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|
314 |
mp_digit a0 = 0, a1 = 0, a2 = 0; |
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|
315 |
mp_digit r0 = 0, r1 = 0, r2 = 0; |
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|
316 |
mp_digit carry; |
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|
317 |
|
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|
318 |
switch(MP_USED(a)) { |
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|
319 |
case 3: |
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|
320 |
a2 = MP_DIGIT(a,2); |
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|
321 |
case 2: |
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|
322 |
a1 = MP_DIGIT(a,1); |
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|
323 |
case 1: |
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|
324 |
a0 = MP_DIGIT(a,0); |
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|
325 |
} |
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|
326 |
switch(MP_USED(b)) { |
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|
327 |
case 3: |
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|
328 |
r2 = MP_DIGIT(b,2); |
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|
329 |
case 2: |
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|
330 |
r1 = MP_DIGIT(b,1); |
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changeset
|
331 |
case 1: |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
332 |
r0 = MP_DIGIT(b,0); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
333 |
} |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
334 |
|
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
335 |
#ifndef MPI_AMD64_ADD |
8175
27e80dc06104
6989705: ECC security code native code compiler warnings
vinnie
parents:
5506
diff
changeset
|
336 |
MP_ADD_CARRY_ZERO(a0, r0, r0, carry); |
3863
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
337 |
MP_ADD_CARRY(a1, r1, r1, carry, carry); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
338 |
MP_ADD_CARRY(a2, r2, r2, carry, carry); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
339 |
#else |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
340 |
__asm__ ( |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
341 |
"xorq %3,%3 \n\t" |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
342 |
"addq %4,%0 \n\t" |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
343 |
"adcq %5,%1 \n\t" |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
344 |
"adcq %6,%2 \n\t" |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
345 |
"adcq $0,%3 \n\t" |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
346 |
: "=r"(r0), "=r"(r1), "=r"(r2), "=r"(carry) |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
347 |
: "r" (a0), "r" (a1), "r" (a2), "0" (r0), |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
348 |
"1" (r1), "2" (r2) |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
349 |
: "%cc" ); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
350 |
#endif |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
351 |
|
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
352 |
/* Do quick 'subract' if we've gone over |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
353 |
* (add the 2's complement of the curve field) */ |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
354 |
if (carry || ((r2 == MP_DIGIT_MAX) && |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
355 |
((r1 == MP_DIGIT_MAX) || |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
356 |
((r1 == (MP_DIGIT_MAX-1)) && (r0 == MP_DIGIT_MAX))))) { |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
357 |
#ifndef MPI_AMD64_ADD |
8175
27e80dc06104
6989705: ECC security code native code compiler warnings
vinnie
parents:
5506
diff
changeset
|
358 |
MP_ADD_CARRY_ZERO(r0, 1, r0, carry); |
3863
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
359 |
MP_ADD_CARRY(r1, 1, r1, carry, carry); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
360 |
MP_ADD_CARRY(r2, 0, r2, carry, carry); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
361 |
#else |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
362 |
__asm__ ( |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
363 |
"addq $1,%0 \n\t" |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
364 |
"adcq $1,%1 \n\t" |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
365 |
"adcq $0,%2 \n\t" |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
366 |
: "=r"(r0), "=r"(r1), "=r"(r2) |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
367 |
: "0" (r0), "1" (r1), "2" (r2) |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
368 |
: "%cc" ); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
369 |
#endif |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
370 |
} |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
371 |
|
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
372 |
|
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
373 |
MP_CHECKOK(s_mp_pad(r, 3)); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
374 |
MP_DIGIT(r, 2) = r2; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
375 |
MP_DIGIT(r, 1) = r1; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
376 |
MP_DIGIT(r, 0) = r0; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
377 |
MP_SIGN(r) = MP_ZPOS; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
378 |
MP_USED(r) = 3; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
379 |
s_mp_clamp(r); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
380 |
|
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
381 |
|
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
382 |
CLEANUP: |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
383 |
return res; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
384 |
} |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
385 |
|
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
386 |
/* Compute the diff of 192 bit curves. Do the work in-line since the |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
387 |
* number of words are so small, we don't want to overhead of mp function |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
388 |
* calls. Uses optimized modular reduction for p192. |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
389 |
*/ |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
390 |
mp_err |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
391 |
ec_GFp_nistp192_sub(const mp_int *a, const mp_int *b, mp_int *r, |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
392 |
const GFMethod *meth) |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
393 |
{ |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
394 |
mp_err res = MP_OKAY; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
395 |
mp_digit b0 = 0, b1 = 0, b2 = 0; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
396 |
mp_digit r0 = 0, r1 = 0, r2 = 0; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
397 |
mp_digit borrow; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
398 |
|
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
399 |
switch(MP_USED(a)) { |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
400 |
case 3: |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
401 |
r2 = MP_DIGIT(a,2); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
402 |
case 2: |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
403 |
r1 = MP_DIGIT(a,1); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
404 |
case 1: |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
405 |
r0 = MP_DIGIT(a,0); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
406 |
} |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
407 |
|
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
408 |
switch(MP_USED(b)) { |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
409 |
case 3: |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
410 |
b2 = MP_DIGIT(b,2); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
411 |
case 2: |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
412 |
b1 = MP_DIGIT(b,1); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
413 |
case 1: |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
414 |
b0 = MP_DIGIT(b,0); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
415 |
} |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
416 |
|
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
417 |
#ifndef MPI_AMD64_ADD |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
418 |
MP_SUB_BORROW(r0, b0, r0, 0, borrow); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
419 |
MP_SUB_BORROW(r1, b1, r1, borrow, borrow); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
420 |
MP_SUB_BORROW(r2, b2, r2, borrow, borrow); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
421 |
#else |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
422 |
__asm__ ( |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
423 |
"xorq %3,%3 \n\t" |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
424 |
"subq %4,%0 \n\t" |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
425 |
"sbbq %5,%1 \n\t" |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
426 |
"sbbq %6,%2 \n\t" |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
427 |
"adcq $0,%3 \n\t" |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
428 |
: "=r"(r0), "=r"(r1), "=r"(r2), "=r"(borrow) |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
429 |
: "r" (b0), "r" (b1), "r" (b2), "0" (r0), |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
430 |
"1" (r1), "2" (r2) |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
431 |
: "%cc" ); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
432 |
#endif |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
433 |
|
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
434 |
/* Do quick 'add' if we've gone under 0 |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
435 |
* (subtract the 2's complement of the curve field) */ |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
436 |
if (borrow) { |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
437 |
#ifndef MPI_AMD64_ADD |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
438 |
MP_SUB_BORROW(r0, 1, r0, 0, borrow); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
439 |
MP_SUB_BORROW(r1, 1, r1, borrow, borrow); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
440 |
MP_SUB_BORROW(r2, 0, r2, borrow, borrow); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
441 |
#else |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
442 |
__asm__ ( |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
443 |
"subq $1,%0 \n\t" |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
444 |
"sbbq $1,%1 \n\t" |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
445 |
"sbbq $0,%2 \n\t" |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
446 |
: "=r"(r0), "=r"(r1), "=r"(r2) |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
447 |
: "0" (r0), "1" (r1), "2" (r2) |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
448 |
: "%cc" ); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
449 |
#endif |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
450 |
} |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
451 |
|
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
452 |
MP_CHECKOK(s_mp_pad(r, 3)); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
453 |
MP_DIGIT(r, 2) = r2; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
454 |
MP_DIGIT(r, 1) = r1; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
455 |
MP_DIGIT(r, 0) = r0; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
456 |
MP_SIGN(r) = MP_ZPOS; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
457 |
MP_USED(r) = 3; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
458 |
s_mp_clamp(r); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
459 |
|
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
460 |
CLEANUP: |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
461 |
return res; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
462 |
} |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
463 |
|
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
464 |
#endif |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
465 |
|
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
466 |
/* Compute the square of polynomial a, reduce modulo p192. Store the |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
467 |
* result in r. r could be a. Uses optimized modular reduction for p192. |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
468 |
*/ |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
469 |
mp_err |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
470 |
ec_GFp_nistp192_sqr(const mp_int *a, mp_int *r, const GFMethod *meth) |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
471 |
{ |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
472 |
mp_err res = MP_OKAY; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
473 |
|
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
474 |
MP_CHECKOK(mp_sqr(a, r)); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
475 |
MP_CHECKOK(ec_GFp_nistp192_mod(r, r, meth)); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
476 |
CLEANUP: |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
477 |
return res; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
478 |
} |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
479 |
|
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
480 |
/* Compute the product of two polynomials a and b, reduce modulo p192. |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
481 |
* Store the result in r. r could be a or b; a could be b. Uses |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
482 |
* optimized modular reduction for p192. */ |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
483 |
mp_err |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
484 |
ec_GFp_nistp192_mul(const mp_int *a, const mp_int *b, mp_int *r, |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
485 |
const GFMethod *meth) |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
486 |
{ |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
487 |
mp_err res = MP_OKAY; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
488 |
|
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
489 |
MP_CHECKOK(mp_mul(a, b, r)); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
490 |
MP_CHECKOK(ec_GFp_nistp192_mod(r, r, meth)); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
491 |
CLEANUP: |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
492 |
return res; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
493 |
} |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
494 |
|
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
495 |
/* Divides two field elements. If a is NULL, then returns the inverse of |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
496 |
* b. */ |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
497 |
mp_err |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
498 |
ec_GFp_nistp192_div(const mp_int *a, const mp_int *b, mp_int *r, |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
499 |
const GFMethod *meth) |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
500 |
{ |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
501 |
mp_err res = MP_OKAY; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
502 |
mp_int t; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
503 |
|
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
504 |
/* If a is NULL, then return the inverse of b, otherwise return a/b. */ |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
505 |
if (a == NULL) { |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
506 |
return mp_invmod(b, &meth->irr, r); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
507 |
} else { |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
508 |
/* MPI doesn't support divmod, so we implement it using invmod and |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
509 |
* mulmod. */ |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
510 |
MP_CHECKOK(mp_init(&t, FLAG(b))); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
511 |
MP_CHECKOK(mp_invmod(b, &meth->irr, &t)); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
512 |
MP_CHECKOK(mp_mul(a, &t, r)); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
513 |
MP_CHECKOK(ec_GFp_nistp192_mod(r, r, meth)); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
514 |
CLEANUP: |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
515 |
mp_clear(&t); |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
516 |
return res; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
517 |
} |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
518 |
} |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
519 |
|
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
520 |
/* Wire in fast field arithmetic and precomputation of base point for |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
521 |
* named curves. */ |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
522 |
mp_err |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
523 |
ec_group_set_gfp192(ECGroup *group, ECCurveName name) |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
524 |
{ |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
525 |
if (name == ECCurve_NIST_P192) { |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
526 |
group->meth->field_mod = &ec_GFp_nistp192_mod; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
527 |
group->meth->field_mul = &ec_GFp_nistp192_mul; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
528 |
group->meth->field_sqr = &ec_GFp_nistp192_sqr; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
529 |
group->meth->field_div = &ec_GFp_nistp192_div; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
530 |
#ifndef ECL_THIRTY_TWO_BIT |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
531 |
group->meth->field_add = &ec_GFp_nistp192_add; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
532 |
group->meth->field_sub = &ec_GFp_nistp192_sub; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
533 |
#endif |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
534 |
} |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
535 |
return MP_OKAY; |
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
536 |
} |