2 * Copyright 2001-2020 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 ec_GFp_simple_group_init,
29 ec_GFp_simple_group_finish,
30 ec_GFp_simple_group_clear_finish,
31 ec_GFp_nist_group_copy,
32 ec_GFp_nist_group_set_curve,
33 ec_GFp_simple_group_get_curve,
34 ec_GFp_simple_group_get_degree,
35 ec_group_simple_order_bits,
36 ec_GFp_simple_group_check_discriminant,
37 ec_GFp_simple_point_init,
38 ec_GFp_simple_point_finish,
39 ec_GFp_simple_point_clear_finish,
40 ec_GFp_simple_point_copy,
41 ec_GFp_simple_point_set_to_infinity,
42 ec_GFp_simple_point_set_affine_coordinates,
43 ec_GFp_simple_point_get_affine_coordinates,
48 ec_GFp_simple_is_at_infinity,
49 ec_GFp_simple_is_on_curve,
51 ec_GFp_simple_make_affine,
52 ec_GFp_simple_points_make_affine,
54 0 /* precompute_mult */ ,
55 0 /* have_precompute_mult */ ,
56 ec_GFp_nist_field_mul,
57 ec_GFp_nist_field_sqr,
59 ec_GFp_simple_field_inv,
60 0 /* field_encode */ ,
61 0 /* field_decode */ ,
62 0, /* field_set_to_one */
63 ec_key_simple_priv2oct,
64 ec_key_simple_oct2priv,
66 ec_key_simple_generate_key,
67 ec_key_simple_check_key,
68 ec_key_simple_generate_public_key,
71 ecdh_simple_compute_key,
72 ecdsa_simple_sign_setup,
73 ecdsa_simple_sign_sig,
74 ecdsa_simple_verify_sig,
75 0, /* field_inverse_mod_ord */
76 ec_GFp_simple_blind_coordinates,
77 ec_GFp_simple_ladder_pre,
78 ec_GFp_simple_ladder_step,
79 ec_GFp_simple_ladder_post
85 int ec_GFp_nist_group_copy(EC_GROUP *dest, const EC_GROUP *src)
87 dest->field_mod_func = src->field_mod_func;
89 return ec_GFp_simple_group_copy(dest, src);
92 int ec_GFp_nist_group_set_curve(EC_GROUP *group, const BIGNUM *p,
93 const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx)
96 BN_CTX *new_ctx = NULL;
99 if ((ctx = new_ctx = BN_CTX_new_ex(group->libctx)) == NULL)
104 if (BN_ucmp(BN_get0_nist_prime_192(), p) == 0)
105 group->field_mod_func = BN_nist_mod_192;
106 else if (BN_ucmp(BN_get0_nist_prime_224(), p) == 0)
107 group->field_mod_func = BN_nist_mod_224;
108 else if (BN_ucmp(BN_get0_nist_prime_256(), p) == 0)
109 group->field_mod_func = BN_nist_mod_256;
110 else if (BN_ucmp(BN_get0_nist_prime_384(), p) == 0)
111 group->field_mod_func = BN_nist_mod_384;
112 else if (BN_ucmp(BN_get0_nist_prime_521(), p) == 0)
113 group->field_mod_func = BN_nist_mod_521;
115 ECerr(EC_F_EC_GFP_NIST_GROUP_SET_CURVE, EC_R_NOT_A_NIST_PRIME);
119 ret = ec_GFp_simple_group_set_curve(group, p, a, b, ctx);
123 BN_CTX_free(new_ctx);
127 int ec_GFp_nist_field_mul(const EC_GROUP *group, BIGNUM *r, const BIGNUM *a,
128 const BIGNUM *b, BN_CTX *ctx)
131 BN_CTX *ctx_new = NULL;
133 if (!group || !r || !a || !b) {
134 ECerr(EC_F_EC_GFP_NIST_FIELD_MUL, ERR_R_PASSED_NULL_PARAMETER);
138 if ((ctx_new = ctx = BN_CTX_new_ex(group->libctx)) == NULL)
141 if (!BN_mul(r, a, b, ctx))
143 if (!group->field_mod_func(r, r, group->field, ctx))
148 BN_CTX_free(ctx_new);
152 int ec_GFp_nist_field_sqr(const EC_GROUP *group, BIGNUM *r, const BIGNUM *a,
156 BN_CTX *ctx_new = NULL;
158 if (!group || !r || !a) {
159 ECerr(EC_F_EC_GFP_NIST_FIELD_SQR, EC_R_PASSED_NULL_PARAMETER);
163 if ((ctx_new = ctx = BN_CTX_new_ex(group->libctx)) == NULL)
166 if (!BN_sqr(r, a, ctx))
168 if (!group->field_mod_func(r, r, group->field, ctx))
173 BN_CTX_free(ctx_new);