1 | /* curve448.h
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2 | *
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3 | * Copyright (C) 2006-2020 wolfSSL Inc.
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4 | *
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5 | * This file is part of wolfSSL.
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6 | *
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7 | * wolfSSL is free software; you can redistribute it and/or modify
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8 | * it under the terms of the GNU General Public License as published by
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9 | * the Free Software Foundation; either version 2 of the License, or
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10 | * (at your option) any later version.
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11 | *
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12 | * wolfSSL is distributed in the hope that it will be useful,
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13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 | * GNU General Public License for more details.
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16 | *
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17 | * You should have received a copy of the GNU General Public License
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18 | * along with this program; if not, write to the Free Software
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19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
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20 | */
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21 |
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22 | /* Implemented to: RFC 7748 */
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23 |
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24 |
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25 | #ifndef WOLF_CRYPT_CURVE448_H
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26 | #define WOLF_CRYPT_CURVE448_H
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27 |
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28 | #include <wolfssl/wolfcrypt/types.h>
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29 |
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30 | #ifdef HAVE_CURVE448
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31 |
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32 | #include <wolfssl/wolfcrypt/fe_448.h>
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33 | #include <wolfssl/wolfcrypt/random.h>
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34 |
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35 | #ifdef WOLFSSL_ASYNC_CRYPT
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36 | #include <wolfssl/wolfcrypt/async.h>
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37 | #endif
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38 |
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39 | #ifdef __cplusplus
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40 | extern "C" {
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41 | #endif
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42 |
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43 | #define CURVE448_KEY_SIZE 56
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44 | #define CURVE448_PUB_KEY_SIZE 56
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45 |
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46 |
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47 | /* A CURVE448 Key */
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48 | typedef struct curve448_key {
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49 | byte p[CURVE448_PUB_KEY_SIZE]; /* public key */
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50 | byte k[CURVE448_KEY_SIZE]; /* private key */
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51 |
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52 | #ifdef WOLFSSL_ASYNC_CRYPT
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53 | WC_ASYNC_DEV asyncDev;
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54 | #endif
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55 | } curve448_key;
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56 |
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57 | enum {
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58 | EC448_LITTLE_ENDIAN = 0,
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59 | EC448_BIG_ENDIAN = 1
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60 | };
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61 |
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62 | WOLFSSL_API
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63 | int wc_curve448_make_key(WC_RNG* rng, int keysize, curve448_key* key);
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64 |
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65 | WOLFSSL_API
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66 | int wc_curve448_shared_secret(curve448_key* private_key,
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67 | curve448_key* public_key,
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68 | byte* out, word32* outlen);
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69 |
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70 | WOLFSSL_API
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71 | int wc_curve448_shared_secret_ex(curve448_key* private_key,
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72 | curve448_key* public_key,
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73 | byte* out, word32* outlen, int endian);
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74 |
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75 | WOLFSSL_API
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76 | int wc_curve448_init(curve448_key* key);
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77 |
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78 | WOLFSSL_API
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79 | void wc_curve448_free(curve448_key* key);
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80 |
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81 |
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82 | /* raw key helpers */
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83 | WOLFSSL_API
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84 | int wc_curve448_import_private(const byte* priv, word32 privSz,
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85 | curve448_key* key);
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86 | WOLFSSL_API
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87 | int wc_curve448_import_private_ex(const byte* priv, word32 privSz,
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88 | curve448_key* key, int endian);
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89 |
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90 | WOLFSSL_API
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91 | int wc_curve448_import_private_raw(const byte* priv, word32 privSz,
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92 | const byte* pub, word32 pubSz,
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93 | curve448_key* key);
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94 | WOLFSSL_API
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95 | int wc_curve448_import_private_raw_ex(const byte* priv, word32 privSz,
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96 | const byte* pub, word32 pubSz,
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97 | curve448_key* key, int endian);
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98 | WOLFSSL_API
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99 | int wc_curve448_export_private_raw(curve448_key* key, byte* out,
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100 | word32* outLen);
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101 | WOLFSSL_API
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102 | int wc_curve448_export_private_raw_ex(curve448_key* key, byte* out,
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103 | word32* outLen, int endian);
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104 |
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105 | WOLFSSL_API
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106 | int wc_curve448_import_public(const byte* in, word32 inLen,
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107 | curve448_key* key);
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108 | WOLFSSL_API
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109 | int wc_curve448_import_public_ex(const byte* in, word32 inLen,
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110 | curve448_key* key, int endian);
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111 | WOLFSSL_API
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112 | int wc_curve448_check_public(const byte* pub, word32 pubSz, int endian);
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113 |
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114 | WOLFSSL_API
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115 | int wc_curve448_export_public(curve448_key* key, byte* out, word32* outLen);
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116 | WOLFSSL_API
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117 | int wc_curve448_export_public_ex(curve448_key* key, byte* out,
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118 | word32* outLen, int endian);
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119 |
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120 | WOLFSSL_API
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121 | int wc_curve448_export_key_raw(curve448_key* key,
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122 | byte* priv, word32 *privSz,
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123 | byte* pub, word32 *pubSz);
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124 | WOLFSSL_API
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125 | int wc_curve448_export_key_raw_ex(curve448_key* key,
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126 | byte* priv, word32 *privSz,
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127 | byte* pub, word32 *pubSz,
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128 | int endian);
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129 | /* size helper */
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130 | WOLFSSL_API
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131 | int wc_curve448_size(curve448_key* key);
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132 |
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133 | #ifdef __cplusplus
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134 | } /* extern "C" */
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135 | #endif
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136 |
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137 | #endif /* HAVE_CURVE448 */
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138 | #endif /* WOLF_CRYPT_CURVE448_H */
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139 |
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