1 /* 2 --------------------------------------------------------------------------- 3 Copyright (c) 2003, 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 33 This file contains the definitions required to use AES in C. See aesopt.h 34 for optimisation details. 35 */ 36 37 #ifndef _AES_H 38 #define _AES_H 39 40 #include "irrMath.h" 41 42 #define AES_128 /* define if AES with 128 bit keys is needed */ 43 #define AES_192 /* define if AES with 192 bit keys is needed */ 44 #define AES_256 /* define if AES with 256 bit keys is needed */ 45 #define AES_VAR /* define if a variable key size is needed */ 46 47 /* The following must also be set in assembler files if being used */ 48 49 #define AES_ENCRYPT /* if support for encryption is needed */ 50 #define AES_DECRYPT /* if support for decryption is needed */ 51 #define AES_ERR_CHK /* for parameter checks & error return codes */ 52 53 typedef irr::u8 aes_08t; 54 typedef irr::u32 aes_32t; 55 56 #define AES_BLOCK_SIZE 16 /* the AES block size in bytes */ 57 #define N_COLS 4 /* the number of columns in the state */ 58 59 /* a maximum of 60 32-bit words are needed for the key schedule */ 60 #define KS_LENGTH 64 61 62 #ifdef AES_ERR_CHK 63 #define aes_ret int 64 #define aes_good 0 65 #define aes_error -1 66 #else 67 #define aes_ret void 68 #endif 69 70 #ifndef AES_DLL /* implement normal/DLL functions */ 71 #define aes_rval aes_ret 72 #else 73 #define aes_rval aes_ret __declspec(dllexport) _stdcall 74 #endif 75 76 /* This routine must be called before first use if non-static */ 77 /* tables are being used */ 78 79 void gen_tabs(void); 80 81 /* The key length (klen) is input in bytes when it is in the range */ 82 /* 16 <= klen <= 32 or in bits when in the range 128 <= klen <= 256 */ 83 84 #ifdef AES_ENCRYPT 85 86 typedef struct 87 { 88 aes_32t ks[KS_LENGTH]; 89 } aes_encrypt_ctx; 90 91 #if defined(AES_128) || defined(AES_VAR) 92 aes_rval aes_encrypt_key128(const void *in_key, aes_encrypt_ctx cx[1]); 93 #endif 94 95 #if defined(AES_192) || defined(AES_VAR) 96 aes_rval aes_encrypt_key192(const void *in_key, aes_encrypt_ctx cx[1]); 97 #endif 98 99 #if defined(AES_256) || defined(AES_VAR) 100 aes_rval aes_encrypt_key256(const void *in_key, aes_encrypt_ctx cx[1]); 101 #endif 102 103 #if defined(AES_VAR) 104 aes_rval aes_encrypt_key(const void *in_key, int key_len, aes_encrypt_ctx cx[1]); 105 #endif 106 107 aes_rval aes_encrypt(const void *in_blk, void *out_blk, const aes_encrypt_ctx cx[1]); 108 #endif 109 110 #ifdef AES_DECRYPT 111 112 typedef struct 113 { 114 aes_32t ks[KS_LENGTH]; 115 } aes_decrypt_ctx; 116 117 #if defined(AES_128) || defined(AES_VAR) 118 aes_rval aes_decrypt_key128(const void *in_key, aes_decrypt_ctx cx[1]); 119 #endif 120 121 #if defined(AES_192) || defined(AES_VAR) 122 aes_rval aes_decrypt_key192(const void *in_key, aes_decrypt_ctx cx[1]); 123 #endif 124 125 #if defined(AES_256) || defined(AES_VAR) 126 aes_rval aes_decrypt_key256(const void *in_key, aes_decrypt_ctx cx[1]); 127 #endif 128 129 #if defined(AES_VAR) 130 aes_rval aes_decrypt_key(const void *in_key, int key_len, aes_decrypt_ctx cx[1]); 131 #endif 132 133 aes_rval aes_decrypt(const void *in_blk, void *out_blk, const aes_decrypt_ctx cx[1]); 134 #endif 135 136 #endif 137 138