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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 | ||
8e3cced7 MC |
18 | int EC_POINT_set_compressed_coordinates(const EC_GROUP *group, EC_POINT *point, |
19 | const BIGNUM *x, int y_bit, BN_CTX *ctx) | |
0f113f3e | 20 | { |
8e3cced7 | 21 | if (group->meth->point_set_compressed_coordinates == NULL |
0f113f3e | 22 | && !(group->meth->flags & EC_FLAGS_DEFAULT_OCT)) { |
8e3cced7 | 23 | ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES, |
0f113f3e MC |
24 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
25 | return 0; | |
26 | } | |
b14e6015 | 27 | if (!ec_point_is_compat(point, group)) { |
8e3cced7 | 28 | ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES, |
0f113f3e MC |
29 | EC_R_INCOMPATIBLE_OBJECTS); |
30 | return 0; | |
31 | } | |
32 | if (group->meth->flags & EC_FLAGS_DEFAULT_OCT) { | |
33 | if (group->meth->field_type == NID_X9_62_prime_field) | |
34 | return ec_GFp_simple_set_compressed_coordinates(group, point, x, | |
35 | y_bit, ctx); | |
36 | else | |
1acc24a8 | 37 | #ifdef OPENSSL_NO_EC2M |
0f113f3e | 38 | { |
8e3cced7 | 39 | ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES, |
0f113f3e MC |
40 | EC_R_GF2M_NOT_SUPPORTED); |
41 | return 0; | |
42 | } | |
1acc24a8 | 43 | #else |
0f113f3e MC |
44 | return ec_GF2m_simple_set_compressed_coordinates(group, point, x, |
45 | y_bit, ctx); | |
1acc24a8 | 46 | #endif |
0f113f3e MC |
47 | } |
48 | return group->meth->point_set_compressed_coordinates(group, point, x, | |
49 | y_bit, ctx); | |
50 | } | |
84b08eee | 51 | |
8e3cced7 MC |
52 | int EC_POINT_set_compressed_coordinates_GFp(const EC_GROUP *group, |
53 | EC_POINT *point, const BIGNUM *x, | |
54 | int y_bit, BN_CTX *ctx) | |
55 | { | |
56 | return EC_POINT_set_compressed_coordinates(group, point, x, y_bit, ctx); | |
57 | } | |
58 | ||
84b08eee | 59 | #ifndef OPENSSL_NO_EC2M |
0f113f3e MC |
60 | int EC_POINT_set_compressed_coordinates_GF2m(const EC_GROUP *group, |
61 | EC_POINT *point, const BIGNUM *x, | |
62 | int y_bit, BN_CTX *ctx) | |
63 | { | |
8e3cced7 | 64 | return EC_POINT_set_compressed_coordinates(group, point, x, y_bit, ctx); |
0f113f3e | 65 | } |
84b08eee DSH |
66 | #endif |
67 | ||
0f113f3e MC |
68 | size_t EC_POINT_point2oct(const EC_GROUP *group, const EC_POINT *point, |
69 | point_conversion_form_t form, unsigned char *buf, | |
70 | size_t len, BN_CTX *ctx) | |
71 | { | |
72 | if (group->meth->point2oct == 0 | |
73 | && !(group->meth->flags & EC_FLAGS_DEFAULT_OCT)) { | |
74 | ECerr(EC_F_EC_POINT_POINT2OCT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
75 | return 0; | |
76 | } | |
b14e6015 | 77 | if (!ec_point_is_compat(point, group)) { |
0f113f3e MC |
78 | ECerr(EC_F_EC_POINT_POINT2OCT, EC_R_INCOMPATIBLE_OBJECTS); |
79 | return 0; | |
80 | } | |
81 | if (group->meth->flags & EC_FLAGS_DEFAULT_OCT) { | |
82 | if (group->meth->field_type == NID_X9_62_prime_field) | |
83 | return ec_GFp_simple_point2oct(group, point, form, buf, len, ctx); | |
84 | else | |
1acc24a8 | 85 | #ifdef OPENSSL_NO_EC2M |
0f113f3e MC |
86 | { |
87 | ECerr(EC_F_EC_POINT_POINT2OCT, EC_R_GF2M_NOT_SUPPORTED); | |
88 | return 0; | |
89 | } | |
1acc24a8 | 90 | #else |
0f113f3e MC |
91 | return ec_GF2m_simple_point2oct(group, point, |
92 | form, buf, len, ctx); | |
1acc24a8 | 93 | #endif |
0f113f3e | 94 | } |
84b08eee | 95 | |
0f113f3e MC |
96 | return group->meth->point2oct(group, point, form, buf, len, ctx); |
97 | } | |
84b08eee DSH |
98 | |
99 | int EC_POINT_oct2point(const EC_GROUP *group, EC_POINT *point, | |
0f113f3e MC |
100 | const unsigned char *buf, size_t len, BN_CTX *ctx) |
101 | { | |
102 | if (group->meth->oct2point == 0 | |
103 | && !(group->meth->flags & EC_FLAGS_DEFAULT_OCT)) { | |
104 | ECerr(EC_F_EC_POINT_OCT2POINT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
105 | return 0; | |
106 | } | |
b14e6015 | 107 | if (!ec_point_is_compat(point, group)) { |
0f113f3e MC |
108 | ECerr(EC_F_EC_POINT_OCT2POINT, EC_R_INCOMPATIBLE_OBJECTS); |
109 | return 0; | |
110 | } | |
111 | if (group->meth->flags & EC_FLAGS_DEFAULT_OCT) { | |
112 | if (group->meth->field_type == NID_X9_62_prime_field) | |
113 | return ec_GFp_simple_oct2point(group, point, buf, len, ctx); | |
114 | else | |
1acc24a8 | 115 | #ifdef OPENSSL_NO_EC2M |
0f113f3e MC |
116 | { |
117 | ECerr(EC_F_EC_POINT_OCT2POINT, EC_R_GF2M_NOT_SUPPORTED); | |
118 | return 0; | |
119 | } | |
1acc24a8 | 120 | #else |
0f113f3e | 121 | return ec_GF2m_simple_oct2point(group, point, buf, len, ctx); |
1acc24a8 | 122 | #endif |
0f113f3e MC |
123 | } |
124 | return group->meth->oct2point(group, point, buf, len, ctx); | |
125 | } | |
981bd8a2 DSH |
126 | |
127 | size_t EC_POINT_point2buf(const EC_GROUP *group, const EC_POINT *point, | |
128 | point_conversion_form_t form, | |
129 | unsigned char **pbuf, BN_CTX *ctx) | |
130 | { | |
131 | size_t len; | |
132 | unsigned char *buf; | |
cdb10bae | 133 | |
981bd8a2 DSH |
134 | len = EC_POINT_point2oct(group, point, form, NULL, 0, NULL); |
135 | if (len == 0) | |
136 | return 0; | |
cdb10bae RS |
137 | if ((buf = OPENSSL_malloc(len)) == NULL) { |
138 | ECerr(EC_F_EC_POINT_POINT2BUF, ERR_R_MALLOC_FAILURE); | |
981bd8a2 | 139 | return 0; |
cdb10bae | 140 | } |
981bd8a2 DSH |
141 | len = EC_POINT_point2oct(group, point, form, buf, len, ctx); |
142 | if (len == 0) { | |
143 | OPENSSL_free(buf); | |
144 | return 0; | |
145 | } | |
146 | *pbuf = buf; | |
147 | return len; | |
148 | } |