Coverage Report

Created: 2018-08-29 13:53

/src/openssl/crypto/ec/ec_oct.c
Line
Count
Source (jump to first uncovered line)
1
/*
2
 * Copyright 2011-2018 The OpenSSL Project Authors. All Rights Reserved.
3
 * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved
4
 *
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
9
 */
10
11
#include <string.h>
12
13
#include <openssl/err.h>
14
#include <openssl/opensslv.h>
15
16
#include "ec_lcl.h"
17
18
int EC_POINT_set_compressed_coordinates(const EC_GROUP *group, EC_POINT *point,
19
                                        const BIGNUM *x, int y_bit, BN_CTX *ctx)
20
0
{
21
0
    if (group->meth->point_set_compressed_coordinates == NULL
22
0
        && !(group->meth->flags & EC_FLAGS_DEFAULT_OCT)) {
23
0
        ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES,
24
0
              ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
25
0
        return 0;
26
0
    }
27
0
    if (!ec_point_is_compat(point, group)) {
28
0
        ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES,
29
0
              EC_R_INCOMPATIBLE_OBJECTS);
30
0
        return 0;
31
0
    }
32
0
    if (group->meth->flags & EC_FLAGS_DEFAULT_OCT) {
33
0
        if (group->meth->field_type == NID_X9_62_prime_field)
34
0
            return ec_GFp_simple_set_compressed_coordinates(group, point, x,
35
0
                                                            y_bit, ctx);
36
0
        else
37
#ifdef OPENSSL_NO_EC2M
38
        {
39
            ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES,
40
                  EC_R_GF2M_NOT_SUPPORTED);
41
            return 0;
42
        }
43
#else
44
0
            return ec_GF2m_simple_set_compressed_coordinates(group, point, x,
45
0
                                                             y_bit, ctx);
46
0
#endif
47
0
    }
48
0
    return group->meth->point_set_compressed_coordinates(group, point, x,
49
0
                                                         y_bit, ctx);
50
0
}
51
52
#if OPENSSL_API_COMPAT < 0x10200000L
53
int EC_POINT_set_compressed_coordinates_GFp(const EC_GROUP *group,
54
                                            EC_POINT *point, const BIGNUM *x,
55
                                            int y_bit, BN_CTX *ctx)
56
0
{
57
0
    return EC_POINT_set_compressed_coordinates(group, point, x, y_bit, ctx);
58
0
}
59
60
# ifndef OPENSSL_NO_EC2M
61
int EC_POINT_set_compressed_coordinates_GF2m(const EC_GROUP *group,
62
                                             EC_POINT *point, const BIGNUM *x,
63
                                             int y_bit, BN_CTX *ctx)
64
0
{
65
0
    return EC_POINT_set_compressed_coordinates(group, point, x, y_bit, ctx);
66
0
}
67
# endif
68
#endif
69
70
size_t EC_POINT_point2oct(const EC_GROUP *group, const EC_POINT *point,
71
                          point_conversion_form_t form, unsigned char *buf,
72
                          size_t len, BN_CTX *ctx)
73
0
{
74
0
    if (group->meth->point2oct == 0
75
0
        && !(group->meth->flags & EC_FLAGS_DEFAULT_OCT)) {
76
0
        ECerr(EC_F_EC_POINT_POINT2OCT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
77
0
        return 0;
78
0
    }
79
0
    if (!ec_point_is_compat(point, group)) {
80
0
        ECerr(EC_F_EC_POINT_POINT2OCT, EC_R_INCOMPATIBLE_OBJECTS);
81
0
        return 0;
82
0
    }
83
0
    if (group->meth->flags & EC_FLAGS_DEFAULT_OCT) {
84
0
        if (group->meth->field_type == NID_X9_62_prime_field)
85
0
            return ec_GFp_simple_point2oct(group, point, form, buf, len, ctx);
86
0
        else
87
#ifdef OPENSSL_NO_EC2M
88
        {
89
            ECerr(EC_F_EC_POINT_POINT2OCT, EC_R_GF2M_NOT_SUPPORTED);
90
            return 0;
91
        }
92
#else
93
0
            return ec_GF2m_simple_point2oct(group, point,
94
0
                                            form, buf, len, ctx);
95
0
#endif
96
0
    }
97
0
98
0
    return group->meth->point2oct(group, point, form, buf, len, ctx);
99
0
}
100
101
int EC_POINT_oct2point(const EC_GROUP *group, EC_POINT *point,
102
                       const unsigned char *buf, size_t len, BN_CTX *ctx)
103
0
{
104
0
    if (group->meth->oct2point == 0
105
0
        && !(group->meth->flags & EC_FLAGS_DEFAULT_OCT)) {
106
0
        ECerr(EC_F_EC_POINT_OCT2POINT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
107
0
        return 0;
108
0
    }
109
0
    if (!ec_point_is_compat(point, group)) {
110
0
        ECerr(EC_F_EC_POINT_OCT2POINT, EC_R_INCOMPATIBLE_OBJECTS);
111
0
        return 0;
112
0
    }
113
0
    if (group->meth->flags & EC_FLAGS_DEFAULT_OCT) {
114
0
        if (group->meth->field_type == NID_X9_62_prime_field)
115
0
            return ec_GFp_simple_oct2point(group, point, buf, len, ctx);
116
0
        else
117
#ifdef OPENSSL_NO_EC2M
118
        {
119
            ECerr(EC_F_EC_POINT_OCT2POINT, EC_R_GF2M_NOT_SUPPORTED);
120
            return 0;
121
        }
122
#else
123
0
            return ec_GF2m_simple_oct2point(group, point, buf, len, ctx);
124
0
#endif
125
0
    }
126
0
    return group->meth->oct2point(group, point, buf, len, ctx);
127
0
}
128
129
size_t EC_POINT_point2buf(const EC_GROUP *group, const EC_POINT *point,
130
                          point_conversion_form_t form,
131
                          unsigned char **pbuf, BN_CTX *ctx)
132
0
{
133
0
    size_t len;
134
0
    unsigned char *buf;
135
0
136
0
    len = EC_POINT_point2oct(group, point, form, NULL, 0, NULL);
137
0
    if (len == 0)
138
0
        return 0;
139
0
    if ((buf = OPENSSL_malloc(len)) == NULL) {
140
0
        ECerr(EC_F_EC_POINT_POINT2BUF, ERR_R_MALLOC_FAILURE);
141
0
        return 0;
142
0
    }
143
0
    len = EC_POINT_point2oct(group, point, form, buf, len, ctx);
144
0
    if (len == 0) {
145
0
        OPENSSL_free(buf);
146
0
        return 0;
147
0
    }
148
0
    *pbuf = buf;
149
0
    return len;
150
0
}