1656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project/* crypto/ec/ecp_mont.c */ 2656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project/* 3656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * Originally written by Bodo Moeller for the OpenSSL project. 4656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project */ 5656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project/* ==================================================================== 6656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * Copyright (c) 1998-2001 The OpenSSL Project. All rights reserved. 7656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 8656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * Redistribution and use in source and binary forms, with or without 9656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * modification, are permitted provided that the following conditions 10656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * are met: 11656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 12656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 1. Redistributions of source code must retain the above copyright 13656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * notice, this list of conditions and the following disclaimer. 14656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 15656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 2. Redistributions in binary form must reproduce the above copyright 16656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * notice, this list of conditions and the following disclaimer in 17656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * the documentation and/or other materials provided with the 18656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * distribution. 19656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 20656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 3. All advertising materials mentioning features or use of this 21656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * software must display the following acknowledgment: 22656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * "This product includes software developed by the OpenSSL Project 23656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" 24656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 25656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 26656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * endorse or promote products derived from this software without 27656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * prior written permission. For written permission, please contact 28656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * openssl-core@openssl.org. 29656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 30656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 5. Products derived from this software may not be called "OpenSSL" 31656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * nor may "OpenSSL" appear in their names without prior written 32656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * permission of the OpenSSL Project. 33656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 34656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 6. Redistributions of any form whatsoever must retain the following 35656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * acknowledgment: 36656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * "This product includes software developed by the OpenSSL Project 37656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * for use in the OpenSSL Toolkit (http://www.openssl.org/)" 38656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 39656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 40656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 41656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 42656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 43656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 44656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 45656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 46656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 47656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 48656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 49656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 50656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * OF THE POSSIBILITY OF SUCH DAMAGE. 51656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * ==================================================================== 52656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 53656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * This product includes cryptographic software written by Eric Young 54656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * (eay@cryptsoft.com). This product includes software written by Tim 55656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * Hudson (tjh@cryptsoft.com). 56656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 57656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project */ 58656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project/* ==================================================================== 59656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. 60656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * Portions of this software developed by SUN MICROSYSTEMS, INC., 61656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * and contributed to the OpenSSL project. 62656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project */ 63656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 64656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#include <openssl/err.h> 65656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 66656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#include "ec_lcl.h" 67656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 68656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 69656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectconst EC_METHOD *EC_GFp_mont_method(void) 70656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 71656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project static const EC_METHOD ret = { 72656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project NID_X9_62_prime_field, 73656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ec_GFp_mont_group_init, 74656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ec_GFp_mont_group_finish, 75656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ec_GFp_mont_group_clear_finish, 76656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ec_GFp_mont_group_copy, 77656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ec_GFp_mont_group_set_curve, 78656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ec_GFp_simple_group_get_curve, 79656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ec_GFp_simple_group_get_degree, 80656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ec_GFp_simple_group_check_discriminant, 81656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ec_GFp_simple_point_init, 82656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ec_GFp_simple_point_finish, 83656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ec_GFp_simple_point_clear_finish, 84656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ec_GFp_simple_point_copy, 85656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ec_GFp_simple_point_set_to_infinity, 86656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ec_GFp_simple_set_Jprojective_coordinates_GFp, 87656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ec_GFp_simple_get_Jprojective_coordinates_GFp, 88656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ec_GFp_simple_point_set_affine_coordinates, 89656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ec_GFp_simple_point_get_affine_coordinates, 90656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ec_GFp_simple_set_compressed_coordinates, 91656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ec_GFp_simple_point2oct, 92656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ec_GFp_simple_oct2point, 93656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ec_GFp_simple_add, 94656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ec_GFp_simple_dbl, 95656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ec_GFp_simple_invert, 96656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ec_GFp_simple_is_at_infinity, 97656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ec_GFp_simple_is_on_curve, 98656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ec_GFp_simple_cmp, 99656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ec_GFp_simple_make_affine, 100656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ec_GFp_simple_points_make_affine, 101656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 0 /* mul */, 102656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 0 /* precompute_mult */, 103656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 0 /* have_precompute_mult */, 104656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ec_GFp_mont_field_mul, 105656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ec_GFp_mont_field_sqr, 106656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 0 /* field_div */, 107656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ec_GFp_mont_field_encode, 108656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ec_GFp_mont_field_decode, 109656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ec_GFp_mont_field_set_to_one }; 110656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 111656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return &ret; 112656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 113656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 114656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 115656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectint ec_GFp_mont_group_init(EC_GROUP *group) 116656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 117656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project int ok; 118656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 119656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ok = ec_GFp_simple_group_init(group); 120656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project group->field_data1 = NULL; 121656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project group->field_data2 = NULL; 122656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return ok; 123656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 124656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 125656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 126656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectvoid ec_GFp_mont_group_finish(EC_GROUP *group) 127656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 128656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (group->field_data1 != NULL) 129656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 130656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project BN_MONT_CTX_free(group->field_data1); 131656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project group->field_data1 = NULL; 132656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 133656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (group->field_data2 != NULL) 134656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 135656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project BN_free(group->field_data2); 136656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project group->field_data2 = NULL; 137656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 138656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ec_GFp_simple_group_finish(group); 139656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 140656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 141656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 142656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectvoid ec_GFp_mont_group_clear_finish(EC_GROUP *group) 143656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 144656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (group->field_data1 != NULL) 145656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 146656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project BN_MONT_CTX_free(group->field_data1); 147656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project group->field_data1 = NULL; 148656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 149656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (group->field_data2 != NULL) 150656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 151656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project BN_clear_free(group->field_data2); 152656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project group->field_data2 = NULL; 153656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 154656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ec_GFp_simple_group_clear_finish(group); 155656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 156656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 157656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 158656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectint ec_GFp_mont_group_copy(EC_GROUP *dest, const EC_GROUP *src) 159656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 160656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (dest->field_data1 != NULL) 161656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 162656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project BN_MONT_CTX_free(dest->field_data1); 163656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project dest->field_data1 = NULL; 164656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 165656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (dest->field_data2 != NULL) 166656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 167656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project BN_clear_free(dest->field_data2); 168656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project dest->field_data2 = NULL; 169656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 170656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 171656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (!ec_GFp_simple_group_copy(dest, src)) return 0; 172656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 173656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (src->field_data1 != NULL) 174656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 175656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project dest->field_data1 = BN_MONT_CTX_new(); 176656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (dest->field_data1 == NULL) return 0; 177656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (!BN_MONT_CTX_copy(dest->field_data1, src->field_data1)) goto err; 178656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 179656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (src->field_data2 != NULL) 180656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 181656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project dest->field_data2 = BN_dup(src->field_data2); 182656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (dest->field_data2 == NULL) goto err; 183656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 184656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 185656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return 1; 186656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 187656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project err: 188656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (dest->field_data1 != NULL) 189656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 190656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project BN_MONT_CTX_free(dest->field_data1); 191656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project dest->field_data1 = NULL; 192656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 193656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return 0; 194656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 195656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 196656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 197656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectint ec_GFp_mont_group_set_curve(EC_GROUP *group, const BIGNUM *p, const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx) 198656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 199656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project BN_CTX *new_ctx = NULL; 200656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project BN_MONT_CTX *mont = NULL; 201656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project BIGNUM *one = NULL; 202656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project int ret = 0; 203656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 204656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (group->field_data1 != NULL) 205656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 206656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project BN_MONT_CTX_free(group->field_data1); 207656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project group->field_data1 = NULL; 208656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 209656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (group->field_data2 != NULL) 210656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 211656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project BN_free(group->field_data2); 212656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project group->field_data2 = NULL; 213656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 214656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 215656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (ctx == NULL) 216656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 217656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ctx = new_ctx = BN_CTX_new(); 218656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (ctx == NULL) 219656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return 0; 220656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 221656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 222656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project mont = BN_MONT_CTX_new(); 223656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (mont == NULL) goto err; 224656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (!BN_MONT_CTX_set(mont, p, ctx)) 225656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 226656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ECerr(EC_F_EC_GFP_MONT_GROUP_SET_CURVE, ERR_R_BN_LIB); 227656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project goto err; 228656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 229656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project one = BN_new(); 230656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (one == NULL) goto err; 231656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (!BN_to_montgomery(one, BN_value_one(), mont, ctx)) goto err; 232656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 233656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project group->field_data1 = mont; 234656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project mont = NULL; 235656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project group->field_data2 = one; 236656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project one = NULL; 237656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 238656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ret = ec_GFp_simple_group_set_curve(group, p, a, b, ctx); 239656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 240656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (!ret) 241656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 242656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project BN_MONT_CTX_free(group->field_data1); 243656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project group->field_data1 = NULL; 244656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project BN_free(group->field_data2); 245656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project group->field_data2 = NULL; 246656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 247656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 248656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project err: 249656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (new_ctx != NULL) 250656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project BN_CTX_free(new_ctx); 251656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (mont != NULL) 252656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project BN_MONT_CTX_free(mont); 253656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return ret; 254656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 255656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 256656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 257656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectint ec_GFp_mont_field_mul(const EC_GROUP *group, BIGNUM *r, const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx) 258656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 259656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (group->field_data1 == NULL) 260656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 261656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ECerr(EC_F_EC_GFP_MONT_FIELD_MUL, EC_R_NOT_INITIALIZED); 262656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return 0; 263656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 264656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 265656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return BN_mod_mul_montgomery(r, a, b, group->field_data1, ctx); 266656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 267656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 268656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 269656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectint ec_GFp_mont_field_sqr(const EC_GROUP *group, BIGNUM *r, const BIGNUM *a, BN_CTX *ctx) 270656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 271656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (group->field_data1 == NULL) 272656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 273656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ECerr(EC_F_EC_GFP_MONT_FIELD_SQR, EC_R_NOT_INITIALIZED); 274656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return 0; 275656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 276656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 277656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return BN_mod_mul_montgomery(r, a, a, group->field_data1, ctx); 278656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 279656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 280656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 281656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectint ec_GFp_mont_field_encode(const EC_GROUP *group, BIGNUM *r, const BIGNUM *a, BN_CTX *ctx) 282656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 283656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (group->field_data1 == NULL) 284656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 285656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ECerr(EC_F_EC_GFP_MONT_FIELD_ENCODE, EC_R_NOT_INITIALIZED); 286656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return 0; 287656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 288656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 289656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return BN_to_montgomery(r, a, (BN_MONT_CTX *)group->field_data1, ctx); 290656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 291656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 292656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 293656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectint ec_GFp_mont_field_decode(const EC_GROUP *group, BIGNUM *r, const BIGNUM *a, BN_CTX *ctx) 294656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 295656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (group->field_data1 == NULL) 296656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 297656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ECerr(EC_F_EC_GFP_MONT_FIELD_DECODE, EC_R_NOT_INITIALIZED); 298656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return 0; 299656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 300656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 301656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return BN_from_montgomery(r, a, group->field_data1, ctx); 302656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 303656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 304656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 305656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectint ec_GFp_mont_field_set_to_one(const EC_GROUP *group, BIGNUM *r, BN_CTX *ctx) 306656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 307656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (group->field_data2 == NULL) 308656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 309656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ECerr(EC_F_EC_GFP_MONT_FIELD_SET_TO_ONE, EC_R_NOT_INITIALIZED); 310656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return 0; 311656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 312656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 313656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (!BN_copy(r, group->field_data2)) return 0; 314656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return 1; 315656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 316