1 | /* ed25519.h
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2 | *
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3 | * Copyright (C) 2006-2017 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 | /*!
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23 | \file wolfssl/wolfcrypt/ed25519.h
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24 | */
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25 |
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26 |
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27 | #ifndef WOLF_CRYPT_ED25519_H
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28 | #define WOLF_CRYPT_ED25519_H
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29 |
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30 | #include <wolfssl/wolfcrypt/types.h>
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31 |
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32 | #ifdef HAVE_ED25519
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33 |
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34 | #include <wolfssl/wolfcrypt/fe_operations.h>
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35 | #include <wolfssl/wolfcrypt/ge_operations.h>
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36 | #include <wolfssl/wolfcrypt/random.h>
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37 | #include <wolfssl/wolfcrypt/sha512.h>
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38 |
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39 | #ifdef WOLFSSL_ASYNC_CRYPT
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40 | #include <wolfssl/wolfcrypt/async.h>
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41 | #endif
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42 |
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43 | #ifdef __cplusplus
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44 | extern "C" {
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45 | #endif
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46 |
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47 |
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48 | /* info about EdDSA curve specifically ed25519, defined as an elliptic curve
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49 | over GF(p) */
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50 | /*
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51 | 32, key size
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52 | "ED25519", curve name
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53 | "2^255-19", prime number
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54 | "SHA512", hash function
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55 | "-121665/121666", value of d
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56 | */
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57 |
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58 | #define ED25519_KEY_SIZE 32 /* private key only */
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59 | #define ED25519_SIG_SIZE 64
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60 |
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61 | #define ED25519_PUB_KEY_SIZE 32 /* compressed */
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62 | /* both private and public key */
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63 | #define ED25519_PRV_KEY_SIZE (ED25519_PUB_KEY_SIZE+ED25519_KEY_SIZE)
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64 |
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65 |
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66 | #ifndef WC_ED25519KEY_TYPE_DEFINED
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67 | typedef struct ed25519_key ed25519_key;
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68 | #define WC_ED25519KEY_TYPE_DEFINED
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69 | #endif
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70 |
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71 | /* An ED25519 Key */
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72 | struct ed25519_key {
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73 | byte p[ED25519_PUB_KEY_SIZE]; /* compressed public key */
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74 | byte k[ED25519_PRV_KEY_SIZE]; /* private key : 32 secret -- 32 public */
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75 | #ifdef FREESCALE_LTC_ECC
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76 | /* uncompressed point coordinates */
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77 | byte pointX[ED25519_KEY_SIZE]; /* recovered X coordinate */
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78 | byte pointY[ED25519_KEY_SIZE]; /* Y coordinate is the public key with The most significant bit of the final octet always zero. */
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79 | #endif
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80 | word16 pubKeySet:1;
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81 | #ifdef WOLFSSL_ASYNC_CRYPT
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82 | WC_ASYNC_DEV asyncDev;
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83 | #endif
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84 | };
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85 |
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86 |
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87 | WOLFSSL_API
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88 | int wc_ed25519_make_key(WC_RNG* rng, int keysize, ed25519_key* key);
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89 | WOLFSSL_API
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90 | int wc_ed25519_sign_msg(const byte* in, word32 inlen, byte* out,
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91 | word32 *outlen, ed25519_key* key);
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92 | WOLFSSL_API
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93 | int wc_ed25519_verify_msg(const byte* sig, word32 siglen, const byte* msg,
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94 | word32 msglen, int* stat, ed25519_key* key);
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95 | WOLFSSL_API
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96 | int wc_ed25519_init(ed25519_key* key);
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97 | WOLFSSL_API
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98 | void wc_ed25519_free(ed25519_key* key);
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99 | WOLFSSL_API
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100 | int wc_ed25519_import_public(const byte* in, word32 inLen, ed25519_key* key);
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101 | WOLFSSL_API
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102 | int wc_ed25519_import_private_only(const byte* priv, word32 privSz,
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103 | ed25519_key* key);
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104 | WOLFSSL_API
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105 | int wc_ed25519_import_private_key(const byte* priv, word32 privSz,
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106 | const byte* pub, word32 pubSz, ed25519_key* key);
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107 | WOLFSSL_API
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108 | int wc_ed25519_export_public(ed25519_key*, byte* out, word32* outLen);
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109 | WOLFSSL_API
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110 | int wc_ed25519_export_private_only(ed25519_key* key, byte* out, word32* outLen);
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111 | WOLFSSL_API
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112 | int wc_ed25519_export_private(ed25519_key* key, byte* out, word32* outLen);
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113 | WOLFSSL_API
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114 | int wc_ed25519_export_key(ed25519_key* key,
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115 | byte* priv, word32 *privSz,
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116 | byte* pub, word32 *pubSz);
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117 |
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118 | int wc_ed25519_check_key(ed25519_key* key);
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119 |
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120 | /* size helper */
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121 | WOLFSSL_API
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122 | int wc_ed25519_size(ed25519_key* key);
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123 | WOLFSSL_API
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124 | int wc_ed25519_priv_size(ed25519_key* key);
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125 | WOLFSSL_API
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126 | int wc_ed25519_pub_size(ed25519_key* key);
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127 | WOLFSSL_API
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128 | int wc_ed25519_sig_size(ed25519_key* key);
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129 |
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130 | #ifdef __cplusplus
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131 | } /* extern "C" */
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132 | #endif
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133 |
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134 | #endif /* HAVE_ED25519 */
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135 | #endif /* WOLF_CRYPT_ED25519_H */
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136 |
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