Terence Huang / LoRaWAN-SX1276-Light

light sensor

Dependencies:   X_NUCLEO_IKS01A1 LoRaWAN-lib SX1276Lib mbed

Fork of LoRaWAN-SX1276-Application-Demo by Uttam Bhat

system/crypto/aes.h@6:25f847c99aa2, 2017-09-09 (annotated)

Committer:
ubhat
Date:
Sat Sep 09 00:26:19 2017 +0000
Revision:
6:25f847c99aa2
Parent:
0:42863a11464a 
Changed packet format to Senet Packet Format for numeric stream on M2X

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ubhat 0:42863a11464a 1 /*
ubhat 0:42863a11464a 2 ---------------------------------------------------------------------------
ubhat 0:42863a11464a 3 Copyright (c) 1998-2008, Brian Gladman, Worcester, UK. All rights reserved.
ubhat 0:42863a11464a 4
ubhat 0:42863a11464a 5 LICENSE TERMS
ubhat 0:42863a11464a 6
ubhat 0:42863a11464a 7 The redistribution and use of this software (with or without changes)
ubhat 0:42863a11464a 8 is allowed without the payment of fees or royalties provided that:
ubhat 0:42863a11464a 9
ubhat 0:42863a11464a 10 1. source code distributions include the above copyright notice, this
ubhat 0:42863a11464a 11 list of conditions and the following disclaimer;
ubhat 0:42863a11464a 12
ubhat 0:42863a11464a 13 2. binary distributions include the above copyright notice, this list
ubhat 0:42863a11464a 14 of conditions and the following disclaimer in their documentation;
ubhat 0:42863a11464a 15
ubhat 0:42863a11464a 16 3. the name of the copyright holder is not used to endorse products
ubhat 0:42863a11464a 17 built using this software without specific written permission.
ubhat 0:42863a11464a 18
ubhat 0:42863a11464a 19 DISCLAIMER
ubhat 0:42863a11464a 20
ubhat 0:42863a11464a 21 This software is provided 'as is' with no explicit or implied warranties
ubhat 0:42863a11464a 22 in respect of its properties, including, but not limited to, correctness
ubhat 0:42863a11464a 23 and/or fitness for purpose.
ubhat 0:42863a11464a 24 ---------------------------------------------------------------------------
ubhat 0:42863a11464a 25 Issue 09/09/2006
ubhat 0:42863a11464a 26
ubhat 0:42863a11464a 27 This is an AES implementation that uses only 8-bit byte operations on the
ubhat 0:42863a11464a 28 cipher state.
ubhat 0:42863a11464a 29 */
ubhat 0:42863a11464a 30
ubhat 0:42863a11464a 31 #ifndef AES_H
ubhat 0:42863a11464a 32 #define AES_H
ubhat 0:42863a11464a 33
ubhat 0:42863a11464a 34 #if 1
ubhat 0:42863a11464a 35 # define AES_ENC_PREKEYED /* AES encryption with a precomputed key schedule */
ubhat 0:42863a11464a 36 #endif
ubhat 0:42863a11464a 37 #if 0
ubhat 0:42863a11464a 38 # define AES_DEC_PREKEYED /* AES decryption with a precomputed key schedule */
ubhat 0:42863a11464a 39 #endif
ubhat 0:42863a11464a 40 #if 0
ubhat 0:42863a11464a 41 # define AES_ENC_128_OTFK /* AES encryption with 'on the fly' 128 bit keying */
ubhat 0:42863a11464a 42 #endif
ubhat 0:42863a11464a 43 #if 0
ubhat 0:42863a11464a 44 # define AES_DEC_128_OTFK /* AES decryption with 'on the fly' 128 bit keying */
ubhat 0:42863a11464a 45 #endif
ubhat 0:42863a11464a 46 #if 0
ubhat 0:42863a11464a 47 # define AES_ENC_256_OTFK /* AES encryption with 'on the fly' 256 bit keying */
ubhat 0:42863a11464a 48 #endif
ubhat 0:42863a11464a 49 #if 0
ubhat 0:42863a11464a 50 # define AES_DEC_256_OTFK /* AES decryption with 'on the fly' 256 bit keying */
ubhat 0:42863a11464a 51 #endif
ubhat 0:42863a11464a 52
ubhat 0:42863a11464a 53 #define N_ROW 4
ubhat 0:42863a11464a 54 #define N_COL 4
ubhat 0:42863a11464a 55 #define N_BLOCK (N_ROW * N_COL)
ubhat 0:42863a11464a 56 #define N_MAX_ROUNDS 14
ubhat 0:42863a11464a 57
ubhat 0:42863a11464a 58 typedef uint8_t return_type;
ubhat 0:42863a11464a 59
ubhat 0:42863a11464a 60 /* Warning: The key length for 256 bit keys overflows a byte
ubhat 0:42863a11464a 61 (see comment below)
ubhat 0:42863a11464a 62 */
ubhat 0:42863a11464a 63
ubhat 0:42863a11464a 64 typedef uint8_t length_type;
ubhat 0:42863a11464a 65
ubhat 0:42863a11464a 66 typedef struct
ubhat 0:42863a11464a 67 { uint8_t ksch[(N_MAX_ROUNDS + 1) * N_BLOCK];
ubhat 0:42863a11464a 68 uint8_t rnd;
ubhat 0:42863a11464a 69 } aes_context;
ubhat 0:42863a11464a 70
ubhat 0:42863a11464a 71 /* The following calls are for a precomputed key schedule
ubhat 0:42863a11464a 72
ubhat 0:42863a11464a 73 NOTE: If the length_type used for the key length is an
ubhat 0:42863a11464a 74 unsigned 8-bit character, a key length of 256 bits must
ubhat 0:42863a11464a 75 be entered as a length in bytes (valid inputs are hence
ubhat 0:42863a11464a 76 128, 192, 16, 24 and 32).
ubhat 0:42863a11464a 77 */
ubhat 0:42863a11464a 78
ubhat 0:42863a11464a 79 #if defined( AES_ENC_PREKEYED ) || defined( AES_DEC_PREKEYED )
ubhat 0:42863a11464a 80
ubhat 0:42863a11464a 81 return_type aes_set_key( const uint8_t key[],
ubhat 0:42863a11464a 82 length_type keylen,
ubhat 0:42863a11464a 83 aes_context ctx[1] );
ubhat 0:42863a11464a 84 #endif
ubhat 0:42863a11464a 85
ubhat 0:42863a11464a 86 #if defined( AES_ENC_PREKEYED )
ubhat 0:42863a11464a 87
ubhat 0:42863a11464a 88 return_type aes_encrypt( const uint8_t in[N_BLOCK],
ubhat 0:42863a11464a 89 uint8_t out[N_BLOCK],
ubhat 0:42863a11464a 90 const aes_context ctx[1] );
ubhat 0:42863a11464a 91
ubhat 0:42863a11464a 92 return_type aes_cbc_encrypt( const uint8_t *in,
ubhat 0:42863a11464a 93 uint8_t *out,
ubhat 0:42863a11464a 94 int32_t n_block,
ubhat 0:42863a11464a 95 uint8_t iv[N_BLOCK],
ubhat 0:42863a11464a 96 const aes_context ctx[1] );
ubhat 0:42863a11464a 97 #endif
ubhat 0:42863a11464a 98
ubhat 0:42863a11464a 99 #if defined( AES_DEC_PREKEYED )
ubhat 0:42863a11464a 100
ubhat 0:42863a11464a 101 return_type aes_decrypt( const uint8_t in[N_BLOCK],
ubhat 0:42863a11464a 102 uint8_t out[N_BLOCK],
ubhat 0:42863a11464a 103 const aes_context ctx[1] );
ubhat 0:42863a11464a 104
ubhat 0:42863a11464a 105 return_type aes_cbc_decrypt( const uint8_t *in,
ubhat 0:42863a11464a 106 uint8_t *out,
ubhat 0:42863a11464a 107 int32_t n_block,
ubhat 0:42863a11464a 108 uint8_t iv[N_BLOCK],
ubhat 0:42863a11464a 109 const aes_context ctx[1] );
ubhat 0:42863a11464a 110 #endif
ubhat 0:42863a11464a 111
ubhat 0:42863a11464a 112 /* The following calls are for 'on the fly' keying. In this case the
ubhat 0:42863a11464a 113 encryption and decryption keys are different.
ubhat 0:42863a11464a 114
ubhat 0:42863a11464a 115 The encryption subroutines take a key in an array of bytes in
ubhat 0:42863a11464a 116 key[L] where L is 16, 24 or 32 bytes for key lengths of 128,
ubhat 0:42863a11464a 117 192, and 256 bits respectively. They then encrypts the input
ubhat 0:42863a11464a 118 data, in[] with this key and put the reult in the output array
ubhat 0:42863a11464a 119 out[]. In addition, the second key array, o_key[L], is used
ubhat 0:42863a11464a 120 to output the key that is needed by the decryption subroutine
ubhat 0:42863a11464a 121 to reverse the encryption operation. The two key arrays can
ubhat 0:42863a11464a 122 be the same array but in this case the original key will be
ubhat 0:42863a11464a 123 overwritten.
ubhat 0:42863a11464a 124
ubhat 0:42863a11464a 125 In the same way, the decryption subroutines output keys that
ubhat 0:42863a11464a 126 can be used to reverse their effect when used for encryption.
ubhat 0:42863a11464a 127
ubhat 0:42863a11464a 128 Only 128 and 256 bit keys are supported in these 'on the fly'
ubhat 0:42863a11464a 129 modes.
ubhat 0:42863a11464a 130 */
ubhat 0:42863a11464a 131
ubhat 0:42863a11464a 132 #if defined( AES_ENC_128_OTFK )
ubhat 0:42863a11464a 133 void aes_encrypt_128( const uint8_t in[N_BLOCK],
ubhat 0:42863a11464a 134 uint8_t out[N_BLOCK],
ubhat 0:42863a11464a 135 const uint8_t key[N_BLOCK],
ubhat 0:42863a11464a 136 uint8_t o_key[N_BLOCK] );
ubhat 0:42863a11464a 137 #endif
ubhat 0:42863a11464a 138
ubhat 0:42863a11464a 139 #if defined( AES_DEC_128_OTFK )
ubhat 0:42863a11464a 140 void aes_decrypt_128( const uint8_t in[N_BLOCK],
ubhat 0:42863a11464a 141 uint8_t out[N_BLOCK],
ubhat 0:42863a11464a 142 const uint8_t key[N_BLOCK],
ubhat 0:42863a11464a 143 uint8_t o_key[N_BLOCK] );
ubhat 0:42863a11464a 144 #endif
ubhat 0:42863a11464a 145
ubhat 0:42863a11464a 146 #if defined( AES_ENC_256_OTFK )
ubhat 0:42863a11464a 147 void aes_encrypt_256( const uint8_t in[N_BLOCK],
ubhat 0:42863a11464a 148 uint8_t out[N_BLOCK],
ubhat 0:42863a11464a 149 const uint8_t key[2 * N_BLOCK],
ubhat 0:42863a11464a 150 uint8_t o_key[2 * N_BLOCK] );
ubhat 0:42863a11464a 151 #endif
ubhat 0:42863a11464a 152
ubhat 0:42863a11464a 153 #if defined( AES_DEC_256_OTFK )
ubhat 0:42863a11464a 154 void aes_decrypt_256( const uint8_t in[N_BLOCK],
ubhat 0:42863a11464a 155 uint8_t out[N_BLOCK],
ubhat 0:42863a11464a 156 const uint8_t key[2 * N_BLOCK],
ubhat 0:42863a11464a 157 uint8_t o_key[2 * N_BLOCK] );
ubhat 0:42863a11464a 158 #endif
ubhat 0:42863a11464a 159
ubhat 0:42863a11464a 160 #endif