blowfish.h
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1 /**
2  * @file blowfish.h
3  * @brief Blowfish encryption algorithm
4  *
5  * @section License
6  *
7  * SPDX-License-Identifier: GPL-2.0-or-later
8  *
9  * Copyright (C) 2010-2019 Oryx Embedded SARL. All rights reserved.
10  *
11  * This file is part of CycloneCrypto Open.
12  *
13  * This program is free software; you can redistribute it and/or
14  * modify it under the terms of the GNU General Public License
15  * as published by the Free Software Foundation; either version 2
16  * of the License, or (at your option) any later version.
17  *
18  * This program is distributed in the hope that it will be useful,
19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21  * GNU General Public License for more details.
22  *
23  * You should have received a copy of the GNU General Public License
24  * along with this program; if not, write to the Free Software Foundation,
25  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
26  *
27  * @author Oryx Embedded SARL (www.oryx-embedded.com)
28  * @version 1.9.6
29  **/
30 
31 #ifndef _BLOWFISH_H
32 #define _BLOWFISH_H
33 
34 //Dependencies
35 #include "core/crypto.h"
36 
37 //Blowfish block size
38 #define BLOWFISH_BLOCK_SIZE 8
39 //Common interface for encryption algorithms
40 #define BLOWFISH_CIPHER_ALGO (&blowfishCipherAlgo)
41 
42 //C++ guard
43 #ifdef __cplusplus
44 extern "C" {
45 #endif
46 
47 
48 /**
49  * @brief Blowfish algorithm context
50  **/
51 
52 typedef struct
53 {
54  uint32_t p[18];
55  uint32_t s1[256];
56  uint32_t s2[256];
57  uint32_t s3[256];
58  uint32_t s4[256];
60 
61 
62 //Blowfish related constants
63 extern const CipherAlgo blowfishCipherAlgo;
64 
65 //Blowfish related functions
66 error_t blowfishInit(BlowfishContext *context, const uint8_t *key,
67  size_t keyLen);
68 
70 
71 error_t blowfishExpandKey(BlowfishContext *context, const uint8_t *salt,
72  size_t saltLen, const uint8_t *key, size_t keyLen);
73 
74 void blowfishEncryptBlock(BlowfishContext *context, const uint8_t *input,
75  uint8_t *output);
76 
77 void blowfishDecryptBlock(BlowfishContext *context, const uint8_t *input,
78  uint8_t *output);
79 
80 void blowfishXorBlock(uint8_t *data, const uint8_t *salt, size_t saltLen,
81  size_t *saltIndex);
82 
83 //C++ guard
84 #ifdef __cplusplus
85 }
86 #endif
87 
88 #endif
error_t blowfishInit(BlowfishContext *context, const uint8_t *key, size_t keyLen)
Initialize a Blowfish context using the supplied key.
Definition: blowfish.c:226
uint8_t p
Definition: ndp.h:298
void blowfishDecryptBlock(BlowfishContext *context, const uint8_t *input, uint8_t *output)
Decrypt a 16-byte block using Blowfish algorithm.
Definition: blowfish.c:460
void blowfishEncryptBlock(BlowfishContext *context, const uint8_t *input, uint8_t *output)
Encrypt a 16-byte block using Blowfish algorithm.
Definition: blowfish.c:410
const CipherAlgo blowfishCipherAlgo
Definition: blowfish.c:204
void blowfishXorBlock(uint8_t *data, const uint8_t *salt, size_t saltLen, size_t *saltIndex)
XOR data block with random salt.
Definition: blowfish.c:511
error_t
Error codes.
Definition: error.h:42
General definitions for cryptographic algorithms.
error_t blowfishExpandKey(BlowfishContext *context, const uint8_t *salt, size_t saltLen, const uint8_t *key, size_t keyLen)
Key expansion.
Definition: blowfish.c:290
Blowfish algorithm context.
Definition: blowfish.h:52
Common interface for encryption algorithms.
Definition: crypto.h:1150
error_t blowfishInitState(BlowfishContext *context)
Blowfish state initialization.
Definition: blowfish.c:256
uint8_t data[]
Definition: dtls_misc.h:176