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84b08eee | 1 | /* |
33388b44 | 2 | * Copyright 2011-2020 The OpenSSL Project Authors. All Rights Reserved. |
aa8f3d76 | 3 | * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved |
84b08eee | 4 | * |
a7f182b7 | 5 | * Licensed under the Apache License 2.0 (the "License"). You may not use |
4f22f405 RS |
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 | |
579422c8 P |
11 | /* |
12 | * ECDSA low level APIs are deprecated for public use, but still ok for | |
13 | * internal use. | |
14 | */ | |
15 | #include "internal/deprecated.h" | |
16 | ||
84b08eee DSH |
17 | #include <string.h> |
18 | ||
19 | #include <openssl/err.h> | |
20 | #include <openssl/opensslv.h> | |
21 | ||
706457b7 | 22 | #include "ec_local.h" |
84b08eee | 23 | |
8e3cced7 MC |
24 | int EC_POINT_set_compressed_coordinates(const EC_GROUP *group, EC_POINT *point, |
25 | const BIGNUM *x, int y_bit, BN_CTX *ctx) | |
0f113f3e | 26 | { |
8e3cced7 | 27 | if (group->meth->point_set_compressed_coordinates == NULL |
0f113f3e | 28 | && !(group->meth->flags & EC_FLAGS_DEFAULT_OCT)) { |
9311d0c4 | 29 | ERR_raise(ERR_LIB_EC, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
0f113f3e MC |
30 | return 0; |
31 | } | |
b14e6015 | 32 | if (!ec_point_is_compat(point, group)) { |
9311d0c4 | 33 | ERR_raise(ERR_LIB_EC, EC_R_INCOMPATIBLE_OBJECTS); |
0f113f3e MC |
34 | return 0; |
35 | } | |
36 | if (group->meth->flags & EC_FLAGS_DEFAULT_OCT) { | |
37 | if (group->meth->field_type == NID_X9_62_prime_field) | |
38 | return ec_GFp_simple_set_compressed_coordinates(group, point, x, | |
39 | y_bit, ctx); | |
40 | else | |
1acc24a8 | 41 | #ifdef OPENSSL_NO_EC2M |
0f113f3e | 42 | { |
9311d0c4 | 43 | ERR_raise(ERR_LIB_EC, EC_R_GF2M_NOT_SUPPORTED); |
0f113f3e MC |
44 | return 0; |
45 | } | |
1acc24a8 | 46 | #else |
0f113f3e MC |
47 | return ec_GF2m_simple_set_compressed_coordinates(group, point, x, |
48 | y_bit, ctx); | |
1acc24a8 | 49 | #endif |
0f113f3e MC |
50 | } |
51 | return group->meth->point_set_compressed_coordinates(group, point, x, | |
52 | y_bit, ctx); | |
53 | } | |
84b08eee | 54 | |
936c2b9e | 55 | #ifndef OPENSSL_NO_DEPRECATED_3_0 |
8e3cced7 MC |
56 | int EC_POINT_set_compressed_coordinates_GFp(const EC_GROUP *group, |
57 | EC_POINT *point, const BIGNUM *x, | |
58 | int y_bit, BN_CTX *ctx) | |
59 | { | |
60 | return EC_POINT_set_compressed_coordinates(group, point, x, y_bit, ctx); | |
61 | } | |
62 | ||
50db8163 | 63 | # ifndef OPENSSL_NO_EC2M |
0f113f3e MC |
64 | int EC_POINT_set_compressed_coordinates_GF2m(const EC_GROUP *group, |
65 | EC_POINT *point, const BIGNUM *x, | |
66 | int y_bit, BN_CTX *ctx) | |
67 | { | |
8e3cced7 | 68 | return EC_POINT_set_compressed_coordinates(group, point, x, y_bit, ctx); |
0f113f3e | 69 | } |
50db8163 | 70 | # endif |
84b08eee DSH |
71 | #endif |
72 | ||
0f113f3e MC |
73 | size_t EC_POINT_point2oct(const EC_GROUP *group, const EC_POINT *point, |
74 | point_conversion_form_t form, unsigned char *buf, | |
75 | size_t len, BN_CTX *ctx) | |
76 | { | |
77 | if (group->meth->point2oct == 0 | |
78 | && !(group->meth->flags & EC_FLAGS_DEFAULT_OCT)) { | |
9311d0c4 | 79 | ERR_raise(ERR_LIB_EC, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
0f113f3e MC |
80 | return 0; |
81 | } | |
b14e6015 | 82 | if (!ec_point_is_compat(point, group)) { |
9311d0c4 | 83 | ERR_raise(ERR_LIB_EC, EC_R_INCOMPATIBLE_OBJECTS); |
0f113f3e MC |
84 | return 0; |
85 | } | |
86 | if (group->meth->flags & EC_FLAGS_DEFAULT_OCT) { | |
87 | if (group->meth->field_type == NID_X9_62_prime_field) | |
88 | return ec_GFp_simple_point2oct(group, point, form, buf, len, ctx); | |
89 | else | |
1acc24a8 | 90 | #ifdef OPENSSL_NO_EC2M |
0f113f3e | 91 | { |
9311d0c4 | 92 | ERR_raise(ERR_LIB_EC, EC_R_GF2M_NOT_SUPPORTED); |
0f113f3e MC |
93 | return 0; |
94 | } | |
1acc24a8 | 95 | #else |
0f113f3e MC |
96 | return ec_GF2m_simple_point2oct(group, point, |
97 | form, buf, len, ctx); | |
1acc24a8 | 98 | #endif |
0f113f3e | 99 | } |
84b08eee | 100 | |
0f113f3e MC |
101 | return group->meth->point2oct(group, point, form, buf, len, ctx); |
102 | } | |
84b08eee DSH |
103 | |
104 | int EC_POINT_oct2point(const EC_GROUP *group, EC_POINT *point, | |
0f113f3e MC |
105 | const unsigned char *buf, size_t len, BN_CTX *ctx) |
106 | { | |
107 | if (group->meth->oct2point == 0 | |
108 | && !(group->meth->flags & EC_FLAGS_DEFAULT_OCT)) { | |
9311d0c4 | 109 | ERR_raise(ERR_LIB_EC, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
0f113f3e MC |
110 | return 0; |
111 | } | |
b14e6015 | 112 | if (!ec_point_is_compat(point, group)) { |
9311d0c4 | 113 | ERR_raise(ERR_LIB_EC, EC_R_INCOMPATIBLE_OBJECTS); |
0f113f3e MC |
114 | return 0; |
115 | } | |
116 | if (group->meth->flags & EC_FLAGS_DEFAULT_OCT) { | |
117 | if (group->meth->field_type == NID_X9_62_prime_field) | |
118 | return ec_GFp_simple_oct2point(group, point, buf, len, ctx); | |
119 | else | |
1acc24a8 | 120 | #ifdef OPENSSL_NO_EC2M |
0f113f3e | 121 | { |
9311d0c4 | 122 | ERR_raise(ERR_LIB_EC, EC_R_GF2M_NOT_SUPPORTED); |
0f113f3e MC |
123 | return 0; |
124 | } | |
1acc24a8 | 125 | #else |
0f113f3e | 126 | return ec_GF2m_simple_oct2point(group, point, buf, len, ctx); |
1acc24a8 | 127 | #endif |
0f113f3e MC |
128 | } |
129 | return group->meth->oct2point(group, point, buf, len, ctx); | |
130 | } | |
981bd8a2 DSH |
131 | |
132 | size_t EC_POINT_point2buf(const EC_GROUP *group, const EC_POINT *point, | |
133 | point_conversion_form_t form, | |
134 | unsigned char **pbuf, BN_CTX *ctx) | |
135 | { | |
136 | size_t len; | |
137 | unsigned char *buf; | |
cdb10bae | 138 | |
981bd8a2 DSH |
139 | len = EC_POINT_point2oct(group, point, form, NULL, 0, NULL); |
140 | if (len == 0) | |
141 | return 0; | |
cdb10bae | 142 | if ((buf = OPENSSL_malloc(len)) == NULL) { |
9311d0c4 | 143 | ERR_raise(ERR_LIB_EC, ERR_R_MALLOC_FAILURE); |
981bd8a2 | 144 | return 0; |
cdb10bae | 145 | } |
981bd8a2 DSH |
146 | len = EC_POINT_point2oct(group, point, form, buf, len, ctx); |
147 | if (len == 0) { | |
148 | OPENSSL_free(buf); | |
149 | return 0; | |
150 | } | |
151 | *pbuf = buf; | |
152 | return len; | |
153 | } |