Balamurugan sanjeevirayar / Mbed 2 deprecated LoRAWANtest

LoRaWAN VIT

Dependencies:   mbed DigitDisplay Chainable_RGB_LED LoRaWAN-lib SX1276Lib

system/crypto/aes.h@4:cd9a19f40d47, 2019-11-29 (annotated)

Committer:
balarayar
Date:
Fri Nov 29 12:35:54 2019 +0000
Revision:
4:cd9a19f40d47
Parent:
0:cb80564f40e1 
VIT LoRaWAN

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mluis 0:cb80564f40e1 1 /*
mluis 0:cb80564f40e1 2 ---------------------------------------------------------------------------
mluis 0:cb80564f40e1 3 Copyright (c) 1998-2008, Brian Gladman, Worcester, UK. All rights reserved.
mluis 0:cb80564f40e1 4
mluis 0:cb80564f40e1 5 LICENSE TERMS
mluis 0:cb80564f40e1 6
mluis 0:cb80564f40e1 7 The redistribution and use of this software (with or without changes)
mluis 0:cb80564f40e1 8 is allowed without the payment of fees or royalties provided that:
mluis 0:cb80564f40e1 9
mluis 0:cb80564f40e1 10 1. source code distributions include the above copyright notice, this
mluis 0:cb80564f40e1 11 list of conditions and the following disclaimer;
mluis 0:cb80564f40e1 12
mluis 0:cb80564f40e1 13 2. binary distributions include the above copyright notice, this list
mluis 0:cb80564f40e1 14 of conditions and the following disclaimer in their documentation;
mluis 0:cb80564f40e1 15
mluis 0:cb80564f40e1 16 3. the name of the copyright holder is not used to endorse products
mluis 0:cb80564f40e1 17 built using this software without specific written permission.
mluis 0:cb80564f40e1 18
mluis 0:cb80564f40e1 19 DISCLAIMER
mluis 0:cb80564f40e1 20
mluis 0:cb80564f40e1 21 This software is provided 'as is' with no explicit or implied warranties
mluis 0:cb80564f40e1 22 in respect of its properties, including, but not limited to, correctness
mluis 0:cb80564f40e1 23 and/or fitness for purpose.
mluis 0:cb80564f40e1 24 ---------------------------------------------------------------------------
mluis 0:cb80564f40e1 25 Issue 09/09/2006
mluis 0:cb80564f40e1 26
mluis 0:cb80564f40e1 27 This is an AES implementation that uses only 8-bit byte operations on the
mluis 0:cb80564f40e1 28 cipher state.
mluis 0:cb80564f40e1 29 */
mluis 0:cb80564f40e1 30
mluis 0:cb80564f40e1 31 #ifndef AES_H
mluis 0:cb80564f40e1 32 #define AES_H
mluis 0:cb80564f40e1 33
mluis 0:cb80564f40e1 34 #if 1
mluis 0:cb80564f40e1 35 # define AES_ENC_PREKEYED /* AES encryption with a precomputed key schedule */
mluis 0:cb80564f40e1 36 #endif
mluis 0:cb80564f40e1 37 #if 0
mluis 0:cb80564f40e1 38 # define AES_DEC_PREKEYED /* AES decryption with a precomputed key schedule */
mluis 0:cb80564f40e1 39 #endif
mluis 0:cb80564f40e1 40 #if 0
mluis 0:cb80564f40e1 41 # define AES_ENC_128_OTFK /* AES encryption with 'on the fly' 128 bit keying */
mluis 0:cb80564f40e1 42 #endif
mluis 0:cb80564f40e1 43 #if 0
mluis 0:cb80564f40e1 44 # define AES_DEC_128_OTFK /* AES decryption with 'on the fly' 128 bit keying */
mluis 0:cb80564f40e1 45 #endif
mluis 0:cb80564f40e1 46 #if 0
mluis 0:cb80564f40e1 47 # define AES_ENC_256_OTFK /* AES encryption with 'on the fly' 256 bit keying */
mluis 0:cb80564f40e1 48 #endif
mluis 0:cb80564f40e1 49 #if 0
mluis 0:cb80564f40e1 50 # define AES_DEC_256_OTFK /* AES decryption with 'on the fly' 256 bit keying */
mluis 0:cb80564f40e1 51 #endif
mluis 0:cb80564f40e1 52
mluis 0:cb80564f40e1 53 #define N_ROW 4
mluis 0:cb80564f40e1 54 #define N_COL 4
mluis 0:cb80564f40e1 55 #define N_BLOCK (N_ROW * N_COL)
mluis 0:cb80564f40e1 56 #define N_MAX_ROUNDS 14
mluis 0:cb80564f40e1 57
mluis 0:cb80564f40e1 58 typedef uint8_t return_type;
mluis 0:cb80564f40e1 59
mluis 0:cb80564f40e1 60 /* Warning: The key length for 256 bit keys overflows a byte
mluis 0:cb80564f40e1 61 (see comment below)
mluis 0:cb80564f40e1 62 */
mluis 0:cb80564f40e1 63
mluis 0:cb80564f40e1 64 typedef uint8_t length_type;
mluis 0:cb80564f40e1 65
mluis 0:cb80564f40e1 66 typedef struct
mluis 0:cb80564f40e1 67 { uint8_t ksch[(N_MAX_ROUNDS + 1) * N_BLOCK];
mluis 0:cb80564f40e1 68 uint8_t rnd;
mluis 0:cb80564f40e1 69 } aes_context;
mluis 0:cb80564f40e1 70
mluis 0:cb80564f40e1 71 /* The following calls are for a precomputed key schedule
mluis 0:cb80564f40e1 72
mluis 0:cb80564f40e1 73 NOTE: If the length_type used for the key length is an
mluis 0:cb80564f40e1 74 unsigned 8-bit character, a key length of 256 bits must
mluis 0:cb80564f40e1 75 be entered as a length in bytes (valid inputs are hence
mluis 0:cb80564f40e1 76 128, 192, 16, 24 and 32).
mluis 0:cb80564f40e1 77 */
mluis 0:cb80564f40e1 78
mluis 0:cb80564f40e1 79 #if defined( AES_ENC_PREKEYED ) || defined( AES_DEC_PREKEYED )
mluis 0:cb80564f40e1 80
mluis 0:cb80564f40e1 81 return_type aes_set_key( const uint8_t key[],
mluis 0:cb80564f40e1 82 length_type keylen,
mluis 0:cb80564f40e1 83 aes_context ctx[1] );
mluis 0:cb80564f40e1 84 #endif
mluis 0:cb80564f40e1 85
mluis 0:cb80564f40e1 86 #if defined( AES_ENC_PREKEYED )
mluis 0:cb80564f40e1 87
mluis 0:cb80564f40e1 88 return_type aes_encrypt( const uint8_t in[N_BLOCK],
mluis 0:cb80564f40e1 89 uint8_t out[N_BLOCK],
mluis 0:cb80564f40e1 90 const aes_context ctx[1] );
mluis 0:cb80564f40e1 91
mluis 0:cb80564f40e1 92 return_type aes_cbc_encrypt( const uint8_t *in,
mluis 0:cb80564f40e1 93 uint8_t *out,
mluis 0:cb80564f40e1 94 int32_t n_block,
mluis 0:cb80564f40e1 95 uint8_t iv[N_BLOCK],
mluis 0:cb80564f40e1 96 const aes_context ctx[1] );
mluis 0:cb80564f40e1 97 #endif
mluis 0:cb80564f40e1 98
mluis 0:cb80564f40e1 99 #if defined( AES_DEC_PREKEYED )
mluis 0:cb80564f40e1 100
mluis 0:cb80564f40e1 101 return_type aes_decrypt( const uint8_t in[N_BLOCK],
mluis 0:cb80564f40e1 102 uint8_t out[N_BLOCK],
mluis 0:cb80564f40e1 103 const aes_context ctx[1] );
mluis 0:cb80564f40e1 104
mluis 0:cb80564f40e1 105 return_type aes_cbc_decrypt( const uint8_t *in,
mluis 0:cb80564f40e1 106 uint8_t *out,
mluis 0:cb80564f40e1 107 int32_t n_block,
mluis 0:cb80564f40e1 108 uint8_t iv[N_BLOCK],
mluis 0:cb80564f40e1 109 const aes_context ctx[1] );
mluis 0:cb80564f40e1 110 #endif
mluis 0:cb80564f40e1 111
mluis 0:cb80564f40e1 112 /* The following calls are for 'on the fly' keying. In this case the
mluis 0:cb80564f40e1 113 encryption and decryption keys are different.
mluis 0:cb80564f40e1 114
mluis 0:cb80564f40e1 115 The encryption subroutines take a key in an array of bytes in
mluis 0:cb80564f40e1 116 key[L] where L is 16, 24 or 32 bytes for key lengths of 128,
mluis 0:cb80564f40e1 117 192, and 256 bits respectively. They then encrypts the input
mluis 0:cb80564f40e1 118 data, in[] with this key and put the reult in the output array
mluis 0:cb80564f40e1 119 out[]. In addition, the second key array, o_key[L], is used
mluis 0:cb80564f40e1 120 to output the key that is needed by the decryption subroutine
mluis 0:cb80564f40e1 121 to reverse the encryption operation. The two key arrays can
mluis 0:cb80564f40e1 122 be the same array but in this case the original key will be
mluis 0:cb80564f40e1 123 overwritten.
mluis 0:cb80564f40e1 124
mluis 0:cb80564f40e1 125 In the same way, the decryption subroutines output keys that
mluis 0:cb80564f40e1 126 can be used to reverse their effect when used for encryption.
mluis 0:cb80564f40e1 127
mluis 0:cb80564f40e1 128 Only 128 and 256 bit keys are supported in these 'on the fly'
mluis 0:cb80564f40e1 129 modes.
mluis 0:cb80564f40e1 130 */
mluis 0:cb80564f40e1 131
mluis 0:cb80564f40e1 132 #if defined( AES_ENC_128_OTFK )
mluis 0:cb80564f40e1 133 void aes_encrypt_128( const uint8_t in[N_BLOCK],
mluis 0:cb80564f40e1 134 uint8_t out[N_BLOCK],
mluis 0:cb80564f40e1 135 const uint8_t key[N_BLOCK],
mluis 0:cb80564f40e1 136 uint8_t o_key[N_BLOCK] );
mluis 0:cb80564f40e1 137 #endif
mluis 0:cb80564f40e1 138
mluis 0:cb80564f40e1 139 #if defined( AES_DEC_128_OTFK )
mluis 0:cb80564f40e1 140 void aes_decrypt_128( const uint8_t in[N_BLOCK],
mluis 0:cb80564f40e1 141 uint8_t out[N_BLOCK],
mluis 0:cb80564f40e1 142 const uint8_t key[N_BLOCK],
mluis 0:cb80564f40e1 143 uint8_t o_key[N_BLOCK] );
mluis 0:cb80564f40e1 144 #endif
mluis 0:cb80564f40e1 145
mluis 0:cb80564f40e1 146 #if defined( AES_ENC_256_OTFK )
mluis 0:cb80564f40e1 147 void aes_encrypt_256( const uint8_t in[N_BLOCK],
mluis 0:cb80564f40e1 148 uint8_t out[N_BLOCK],
mluis 0:cb80564f40e1 149 const uint8_t key[2 * N_BLOCK],
mluis 0:cb80564f40e1 150 uint8_t o_key[2 * N_BLOCK] );
mluis 0:cb80564f40e1 151 #endif
mluis 0:cb80564f40e1 152
mluis 0:cb80564f40e1 153 #if defined( AES_DEC_256_OTFK )
mluis 0:cb80564f40e1 154 void aes_decrypt_256( const uint8_t in[N_BLOCK],
mluis 0:cb80564f40e1 155 uint8_t out[N_BLOCK],
mluis 0:cb80564f40e1 156 const uint8_t key[2 * N_BLOCK],
mluis 0:cb80564f40e1 157 uint8_t o_key[2 * N_BLOCK] );
mluis 0:cb80564f40e1 158 #endif
mluis 0:cb80564f40e1 159
mluis 0:cb80564f40e1 160 #endif