1 /* crypto/ec/ecp_nist.c */
3 * Written by Nils Larsch for the OpenSSL project.
5 /* ====================================================================
6 * Copyright (c) 1998-2003 The OpenSSL Project. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
20 * 3. All advertising materials mentioning features or use of this
21 * software must display the following acknowledgment:
22 * "This product includes software developed by the OpenSSL Project
23 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 * endorse or promote products derived from this software without
27 * prior written permission. For written permission, please contact
28 * openssl-core@openssl.org.
30 * 5. Products derived from this software may not be called "OpenSSL"
31 * nor may "OpenSSL" appear in their names without prior written
32 * permission of the OpenSSL Project.
34 * 6. Redistributions of any form whatsoever must retain the following
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
53 * This product includes cryptographic software written by Eric Young
54 * (eay@cryptsoft.com). This product includes software written by Tim
55 * Hudson (tjh@cryptsoft.com).
58 /* ====================================================================
59 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
60 * Portions of this software developed by SUN MICROSYSTEMS, INC.,
61 * and contributed to the OpenSSL project.
66 #include <openssl/err.h>
67 #include <openssl/obj_mac.h>
71 #include <openssl/fips.h>
74 const EC_METHOD *EC_GFp_nist_method(void)
76 static const EC_METHOD ret = {
78 NID_X9_62_prime_field,
79 ec_GFp_simple_group_init,
80 ec_GFp_simple_group_finish,
81 ec_GFp_simple_group_clear_finish,
82 ec_GFp_nist_group_copy,
83 ec_GFp_nist_group_set_curve,
84 ec_GFp_simple_group_get_curve,
85 ec_GFp_simple_group_get_degree,
86 ec_GFp_simple_group_check_discriminant,
87 ec_GFp_simple_point_init,
88 ec_GFp_simple_point_finish,
89 ec_GFp_simple_point_clear_finish,
90 ec_GFp_simple_point_copy,
91 ec_GFp_simple_point_set_to_infinity,
92 ec_GFp_simple_set_Jprojective_coordinates_GFp,
93 ec_GFp_simple_get_Jprojective_coordinates_GFp,
94 ec_GFp_simple_point_set_affine_coordinates,
95 ec_GFp_simple_point_get_affine_coordinates,
100 ec_GFp_simple_is_at_infinity,
101 ec_GFp_simple_is_on_curve,
103 ec_GFp_simple_make_affine,
104 ec_GFp_simple_points_make_affine,
106 0 /* precompute_mult */,
107 0 /* have_precompute_mult */,
108 ec_GFp_nist_field_mul,
109 ec_GFp_nist_field_sqr,
111 0 /* field_encode */,
112 0 /* field_decode */,
113 0 /* field_set_to_one */ };
117 return fips_ec_gfp_nist_method();
123 int ec_GFp_nist_group_copy(EC_GROUP *dest, const EC_GROUP *src)
125 dest->field_mod_func = src->field_mod_func;
127 return ec_GFp_simple_group_copy(dest, src);
130 int ec_GFp_nist_group_set_curve(EC_GROUP *group, const BIGNUM *p,
131 const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx)
134 BN_CTX *new_ctx = NULL;
138 if ((ctx = new_ctx = BN_CTX_new()) == NULL) return 0;
141 if ((tmp_bn = BN_CTX_get(ctx)) == NULL) goto err;
143 if (BN_ucmp(BN_get0_nist_prime_192(), p) == 0)
144 group->field_mod_func = BN_nist_mod_192;
145 else if (BN_ucmp(BN_get0_nist_prime_224(), p) == 0)
146 group->field_mod_func = BN_nist_mod_224;
147 else if (BN_ucmp(BN_get0_nist_prime_256(), p) == 0)
148 group->field_mod_func = BN_nist_mod_256;
149 else if (BN_ucmp(BN_get0_nist_prime_384(), p) == 0)
150 group->field_mod_func = BN_nist_mod_384;
151 else if (BN_ucmp(BN_get0_nist_prime_521(), p) == 0)
152 group->field_mod_func = BN_nist_mod_521;
155 ECerr(EC_F_EC_GFP_NIST_GROUP_SET_CURVE, EC_R_NOT_A_NIST_PRIME);
159 ret = ec_GFp_simple_group_set_curve(group, p, a, b, ctx);
164 BN_CTX_free(new_ctx);
169 int ec_GFp_nist_field_mul(const EC_GROUP *group, BIGNUM *r, const BIGNUM *a,
170 const BIGNUM *b, BN_CTX *ctx)
173 BN_CTX *ctx_new=NULL;
175 if (!group || !r || !a || !b)
177 ECerr(EC_F_EC_GFP_NIST_FIELD_MUL, ERR_R_PASSED_NULL_PARAMETER);
181 if ((ctx_new = ctx = BN_CTX_new()) == NULL) goto err;
183 if (!BN_mul(r, a, b, ctx)) goto err;
184 if (!group->field_mod_func(r, r, &group->field, ctx))
190 BN_CTX_free(ctx_new);
195 int ec_GFp_nist_field_sqr(const EC_GROUP *group, BIGNUM *r, const BIGNUM *a,
199 BN_CTX *ctx_new=NULL;
201 if (!group || !r || !a)
203 ECerr(EC_F_EC_GFP_NIST_FIELD_SQR, EC_R_PASSED_NULL_PARAMETER);
207 if ((ctx_new = ctx = BN_CTX_new()) == NULL) goto err;
209 if (!BN_sqr(r, a, ctx)) goto err;
210 if (!group->field_mod_func(r, r, &group->field, ctx))
216 BN_CTX_free(ctx_new);