1 /* 2 --------------------------------------------------------------------------- 3 Copyright (c) 2002, Dr Brian Gladman < >, Worcester, UK. 4 All rights reserved. 5 6 LICENSE TERMS 7 8 The free distribution and use of this software in both source and binary 9 form is allowed (with or without changes) provided that: 10 11 1. distributions of this source code include the above copyright 12 notice, this list of conditions and the following disclaimer; 13 14 2. distributions in binary form include the above copyright 15 notice, this list of conditions and the following disclaimer 16 in the documentation and/or other associated materials; 17 18 3. the copyright holder's name is not used to endorse products 19 built using this software without specific written permission. 20 21 ALTERNATIVELY, provided that this notice is retained in full, this product 22 may be distributed under the terms of the GNU General Public License (GPL), 23 in which case the provisions of the GPL apply INSTEAD OF those given above. 24 25 DISCLAIMER 26 27 This software is provided 'as is' with no explicit or implied warranties 28 in respect of its properties, including, but not limited to, correctness 29 and/or fitness for purpose. 30 --------------------------------------------------------------------------- 31 Issue Date: 26/08/2003 32 Includes a bugfix from Dr Brian Gladman made on 16/04/2012 for compiling on 64-bit 33 34 This is an implementation of HMAC, the FIPS standard keyed hash function 35 */ 36 37 #ifndef _HMAC_H 38 #define _HMAC_H 39 40 #include <memory.h> 41 42 #define USE_SHA1 // Irrlicht only cares about SHA1 for now 43 #if !defined(USE_SHA1) && !defined(USE_SHA256) 44 #error define USE_SHA1 or USE_SHA256 to set the HMAC hash algorithm 45 #endif 46 47 #ifdef USE_SHA1 48 49 #include "sha1.h" 50 51 #define HMAC_HASH_INPUT_SIZE SHA1_BLOCK_SIZE 52 #define HMAC_HASH_OUTPUT_SIZE SHA1_DIGEST_SIZE 53 #define sha_ctx sha1_ctx 54 #define sha_begin sha1_begin 55 #define sha_hash sha1_hash 56 #define sha_end sha1_end 57 58 #endif 59 60 #ifdef USE_SHA256 61 62 #include "sha2.h" 63 64 #define HMAC_HASH_INPUT_SIZE SHA256_BLOCK_SIZE 65 #define HMAC_HASH_OUTPUT_SIZE SHA256_DIGEST_SIZE 66 #define sha_ctx sha256_ctx 67 #define sha_begin sha256_begin 68 #define sha_hash sha256_hash 69 #define sha_end sha256_end 70 71 #endif 72 73 #define HMAC_OK 0 74 #define HMAC_BAD_MODE -1 75 #define HMAC_IN_DATA 0xffffffff 76 77 typedef struct 78 { unsigned char key[HMAC_HASH_INPUT_SIZE]; 79 sha_ctx ctx[1]; 80 unsigned long klen; 81 } hmac_ctx; 82 83 void hmac_sha_begin(hmac_ctx cx[1]); 84 85 int hmac_sha_key(const unsigned char key[], unsigned long key_len, hmac_ctx cx[1]); 86 87 void hmac_sha_data(const unsigned char data[], unsigned long data_len, hmac_ctx cx[1]); 88 89 void hmac_sha_end(unsigned char mac[], unsigned long mac_len, hmac_ctx cx[1]); 90 91 void hmac_sha(const unsigned char key[], unsigned long key_len, 92 const unsigned char data[], unsigned long data_len, 93 unsigned char mac[], unsigned long mac_len); 94 95 #endif 96