2 * Copyright 2001-2021 The OpenSSL Project Authors. All Rights Reserved.
3 * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved
5 * Licensed under the Apache License 2.0 (the "License"). You may not use
6 * this file except in compliance with the License. You can obtain a copy
7 * in the file LICENSE in the source distribution or at
8 * https://www.openssl.org/source/license.html
12 * ECDSA low level APIs are deprecated for public use, but still ok for
15 #include "internal/deprecated.h"
19 #include <openssl/err.h>
20 #include <openssl/obj_mac.h>
23 const EC_METHOD *EC_GFp_nist_method(void)
25 static const EC_METHOD ret = {
27 NID_X9_62_prime_field,
28 ossl_ec_GFp_simple_group_init,
29 ossl_ec_GFp_simple_group_finish,
30 ossl_ec_GFp_simple_group_clear_finish,
31 ossl_ec_GFp_nist_group_copy,
32 ossl_ec_GFp_nist_group_set_curve,
33 ossl_ec_GFp_simple_group_get_curve,
34 ossl_ec_GFp_simple_group_get_degree,
35 ossl_ec_group_simple_order_bits,
36 ossl_ec_GFp_simple_group_check_discriminant,
37 ossl_ec_GFp_simple_point_init,
38 ossl_ec_GFp_simple_point_finish,
39 ossl_ec_GFp_simple_point_clear_finish,
40 ossl_ec_GFp_simple_point_copy,
41 ossl_ec_GFp_simple_point_set_to_infinity,
42 ossl_ec_GFp_simple_point_set_affine_coordinates,
43 ossl_ec_GFp_simple_point_get_affine_coordinates,
45 ossl_ec_GFp_simple_add,
46 ossl_ec_GFp_simple_dbl,
47 ossl_ec_GFp_simple_invert,
48 ossl_ec_GFp_simple_is_at_infinity,
49 ossl_ec_GFp_simple_is_on_curve,
50 ossl_ec_GFp_simple_cmp,
51 ossl_ec_GFp_simple_make_affine,
52 ossl_ec_GFp_simple_points_make_affine,
54 0 /* precompute_mult */ ,
55 0 /* have_precompute_mult */ ,
56 ossl_ec_GFp_nist_field_mul,
57 ossl_ec_GFp_nist_field_sqr,
59 ossl_ec_GFp_simple_field_inv,
60 0 /* field_encode */ ,
61 0 /* field_decode */ ,
62 0, /* field_set_to_one */
63 ossl_ec_key_simple_priv2oct,
64 ossl_ec_key_simple_oct2priv,
66 ossl_ec_key_simple_generate_key,
67 ossl_ec_key_simple_check_key,
68 ossl_ec_key_simple_generate_public_key,
71 ossl_ecdh_simple_compute_key,
72 ossl_ecdsa_simple_sign_setup,
73 ossl_ecdsa_simple_sign_sig,
74 ossl_ecdsa_simple_verify_sig,
75 0, /* field_inverse_mod_ord */
76 ossl_ec_GFp_simple_blind_coordinates,
77 ossl_ec_GFp_simple_ladder_pre,
78 ossl_ec_GFp_simple_ladder_step,
79 ossl_ec_GFp_simple_ladder_post
85 int ossl_ec_GFp_nist_group_copy(EC_GROUP *dest, const EC_GROUP *src)
87 dest->field_mod_func = src->field_mod_func;
89 return ossl_ec_GFp_simple_group_copy(dest, src);
92 int ossl_ec_GFp_nist_group_set_curve(EC_GROUP *group, const BIGNUM *p,
93 const BIGNUM *a, const BIGNUM *b,
97 BN_CTX *new_ctx = NULL;
100 if ((ctx = new_ctx = BN_CTX_new_ex(group->libctx)) == NULL)
105 if (BN_ucmp(BN_get0_nist_prime_192(), p) == 0)
106 group->field_mod_func = BN_nist_mod_192;
107 else if (BN_ucmp(BN_get0_nist_prime_224(), p) == 0)
108 group->field_mod_func = BN_nist_mod_224;
109 else if (BN_ucmp(BN_get0_nist_prime_256(), p) == 0)
110 group->field_mod_func = BN_nist_mod_256;
111 else if (BN_ucmp(BN_get0_nist_prime_384(), p) == 0)
112 group->field_mod_func = BN_nist_mod_384;
113 else if (BN_ucmp(BN_get0_nist_prime_521(), p) == 0)
114 group->field_mod_func = BN_nist_mod_521;
116 ERR_raise(ERR_LIB_EC, EC_R_NOT_A_NIST_PRIME);
120 ret = ossl_ec_GFp_simple_group_set_curve(group, p, a, b, ctx);
124 BN_CTX_free(new_ctx);
128 int ossl_ec_GFp_nist_field_mul(const EC_GROUP *group, BIGNUM *r, const BIGNUM *a,
129 const BIGNUM *b, BN_CTX *ctx)
132 BN_CTX *ctx_new = NULL;
134 if (!group || !r || !a || !b) {
135 ERR_raise(ERR_LIB_EC, ERR_R_PASSED_NULL_PARAMETER);
139 if ((ctx_new = ctx = BN_CTX_new_ex(group->libctx)) == NULL)
142 if (!BN_mul(r, a, b, ctx))
144 if (!group->field_mod_func(r, r, group->field, ctx))
149 BN_CTX_free(ctx_new);
153 int ossl_ec_GFp_nist_field_sqr(const EC_GROUP *group, BIGNUM *r, const BIGNUM *a,
157 BN_CTX *ctx_new = NULL;
159 if (!group || !r || !a) {
160 ERR_raise(ERR_LIB_EC, EC_R_PASSED_NULL_PARAMETER);
164 if ((ctx_new = ctx = BN_CTX_new_ex(group->libctx)) == NULL)
167 if (!BN_sqr(r, a, ctx))
169 if (!group->field_mod_func(r, r, group->field, ctx))
174 BN_CTX_free(ctx_new);