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Commit | Line | Data |
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84b08eee | 1 | /* |
28428130 | 2 | * Copyright 2011-2018 The OpenSSL Project Authors. All Rights Reserved. |
aa8f3d76 | 3 | * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved |
84b08eee | 4 | * |
4f22f405 RS |
5 | * Licensed under the OpenSSL license (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 | |
84b08eee | 9 | */ |
4f22f405 | 10 | |
84b08eee DSH |
11 | #include <string.h> |
12 | ||
13 | #include <openssl/err.h> | |
14 | #include <openssl/opensslv.h> | |
15 | ||
16 | #include "ec_lcl.h" | |
17 | ||
0f113f3e MC |
18 | int EC_POINT_set_compressed_coordinates_GFp(const EC_GROUP *group, |
19 | EC_POINT *point, const BIGNUM *x, | |
20 | int y_bit, BN_CTX *ctx) | |
21 | { | |
22 | if (group->meth->point_set_compressed_coordinates == 0 | |
23 | && !(group->meth->flags & EC_FLAGS_DEFAULT_OCT)) { | |
24 | ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GFP, | |
25 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
26 | return 0; | |
27 | } | |
28 | if (group->meth != point->meth) { | |
29 | ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GFP, | |
30 | EC_R_INCOMPATIBLE_OBJECTS); | |
31 | return 0; | |
32 | } | |
33 | if (group->meth->flags & EC_FLAGS_DEFAULT_OCT) { | |
34 | if (group->meth->field_type == NID_X9_62_prime_field) | |
35 | return ec_GFp_simple_set_compressed_coordinates(group, point, x, | |
36 | y_bit, ctx); | |
37 | else | |
1acc24a8 | 38 | #ifdef OPENSSL_NO_EC2M |
0f113f3e MC |
39 | { |
40 | ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GFP, | |
41 | EC_R_GF2M_NOT_SUPPORTED); | |
42 | return 0; | |
43 | } | |
1acc24a8 | 44 | #else |
0f113f3e MC |
45 | return ec_GF2m_simple_set_compressed_coordinates(group, point, x, |
46 | y_bit, ctx); | |
1acc24a8 | 47 | #endif |
0f113f3e MC |
48 | } |
49 | return group->meth->point_set_compressed_coordinates(group, point, x, | |
50 | y_bit, ctx); | |
51 | } | |
84b08eee DSH |
52 | |
53 | #ifndef OPENSSL_NO_EC2M | |
0f113f3e MC |
54 | int EC_POINT_set_compressed_coordinates_GF2m(const EC_GROUP *group, |
55 | EC_POINT *point, const BIGNUM *x, | |
56 | int y_bit, BN_CTX *ctx) | |
57 | { | |
58 | if (group->meth->point_set_compressed_coordinates == 0 | |
59 | && !(group->meth->flags & EC_FLAGS_DEFAULT_OCT)) { | |
60 | ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GF2M, | |
61 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
62 | return 0; | |
63 | } | |
64 | if (group->meth != point->meth) { | |
65 | ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GF2M, | |
66 | EC_R_INCOMPATIBLE_OBJECTS); | |
67 | return 0; | |
68 | } | |
69 | if (group->meth->flags & EC_FLAGS_DEFAULT_OCT) { | |
70 | if (group->meth->field_type == NID_X9_62_prime_field) | |
71 | return ec_GFp_simple_set_compressed_coordinates(group, point, x, | |
72 | y_bit, ctx); | |
73 | else | |
74 | return ec_GF2m_simple_set_compressed_coordinates(group, point, x, | |
75 | y_bit, ctx); | |
76 | } | |
77 | return group->meth->point_set_compressed_coordinates(group, point, x, | |
78 | y_bit, ctx); | |
79 | } | |
84b08eee DSH |
80 | #endif |
81 | ||
0f113f3e MC |
82 | size_t EC_POINT_point2oct(const EC_GROUP *group, const EC_POINT *point, |
83 | point_conversion_form_t form, unsigned char *buf, | |
84 | size_t len, BN_CTX *ctx) | |
85 | { | |
86 | if (group->meth->point2oct == 0 | |
87 | && !(group->meth->flags & EC_FLAGS_DEFAULT_OCT)) { | |
88 | ECerr(EC_F_EC_POINT_POINT2OCT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
89 | return 0; | |
90 | } | |
91 | if (group->meth != point->meth) { | |
92 | ECerr(EC_F_EC_POINT_POINT2OCT, EC_R_INCOMPATIBLE_OBJECTS); | |
93 | return 0; | |
94 | } | |
95 | if (group->meth->flags & EC_FLAGS_DEFAULT_OCT) { | |
96 | if (group->meth->field_type == NID_X9_62_prime_field) | |
97 | return ec_GFp_simple_point2oct(group, point, form, buf, len, ctx); | |
98 | else | |
1acc24a8 | 99 | #ifdef OPENSSL_NO_EC2M |
0f113f3e MC |
100 | { |
101 | ECerr(EC_F_EC_POINT_POINT2OCT, EC_R_GF2M_NOT_SUPPORTED); | |
102 | return 0; | |
103 | } | |
1acc24a8 | 104 | #else |
0f113f3e MC |
105 | return ec_GF2m_simple_point2oct(group, point, |
106 | form, buf, len, ctx); | |
1acc24a8 | 107 | #endif |
0f113f3e | 108 | } |
84b08eee | 109 | |
0f113f3e MC |
110 | return group->meth->point2oct(group, point, form, buf, len, ctx); |
111 | } | |
84b08eee DSH |
112 | |
113 | int EC_POINT_oct2point(const EC_GROUP *group, EC_POINT *point, | |
0f113f3e MC |
114 | const unsigned char *buf, size_t len, BN_CTX *ctx) |
115 | { | |
116 | if (group->meth->oct2point == 0 | |
117 | && !(group->meth->flags & EC_FLAGS_DEFAULT_OCT)) { | |
118 | ECerr(EC_F_EC_POINT_OCT2POINT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
119 | return 0; | |
120 | } | |
121 | if (group->meth != point->meth) { | |
122 | ECerr(EC_F_EC_POINT_OCT2POINT, EC_R_INCOMPATIBLE_OBJECTS); | |
123 | return 0; | |
124 | } | |
125 | if (group->meth->flags & EC_FLAGS_DEFAULT_OCT) { | |
126 | if (group->meth->field_type == NID_X9_62_prime_field) | |
127 | return ec_GFp_simple_oct2point(group, point, buf, len, ctx); | |
128 | else | |
1acc24a8 | 129 | #ifdef OPENSSL_NO_EC2M |
0f113f3e MC |
130 | { |
131 | ECerr(EC_F_EC_POINT_OCT2POINT, EC_R_GF2M_NOT_SUPPORTED); | |
132 | return 0; | |
133 | } | |
1acc24a8 | 134 | #else |
0f113f3e | 135 | return ec_GF2m_simple_oct2point(group, point, buf, len, ctx); |
1acc24a8 | 136 | #endif |
0f113f3e MC |
137 | } |
138 | return group->meth->oct2point(group, point, buf, len, ctx); | |
139 | } | |
981bd8a2 DSH |
140 | |
141 | size_t EC_POINT_point2buf(const EC_GROUP *group, const EC_POINT *point, | |
142 | point_conversion_form_t form, | |
143 | unsigned char **pbuf, BN_CTX *ctx) | |
144 | { | |
145 | size_t len; | |
146 | unsigned char *buf; | |
cdb10bae | 147 | |
981bd8a2 DSH |
148 | len = EC_POINT_point2oct(group, point, form, NULL, 0, NULL); |
149 | if (len == 0) | |
150 | return 0; | |
cdb10bae RS |
151 | if ((buf = OPENSSL_malloc(len)) == NULL) { |
152 | ECerr(EC_F_EC_POINT_POINT2BUF, ERR_R_MALLOC_FAILURE); | |
981bd8a2 | 153 | return 0; |
cdb10bae | 154 | } |
981bd8a2 DSH |
155 | len = EC_POINT_point2oct(group, point, form, buf, len, ctx); |
156 | if (len == 0) { | |
157 | OPENSSL_free(buf); | |
158 | return 0; | |
159 | } | |
160 | *pbuf = buf; | |
161 | return len; | |
162 | } |