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annotate nss/lib/freebl/rijndael.h @ 4:b513267f632f tip

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Build DBM module
author Andre Heinecke <andre.heinecke@intevation.de>
date Tue, 05 Aug 2014 18:58:03 +0200
parents 1e5118fa0cb1
children
rev   line source
0
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1 /* This Source Code Form is subject to the terms of the Mozilla Public
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2 * License, v. 2.0. If a copy of the MPL was not distributed with this
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3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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4
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5 #ifndef _RIJNDAEL_H_
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6 #define _RIJNDAEL_H_ 1
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7
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8 #include "blapii.h"
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9
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10 #define RIJNDAEL_MIN_BLOCKSIZE 16 /* bytes */
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11 #define RIJNDAEL_MAX_BLOCKSIZE 32 /* bytes */
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12
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13 typedef SECStatus AESBlockFunc(AESContext *cx,
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14 unsigned char *output,
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15 const unsigned char *input);
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16
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17 /* RIJNDAEL_NUM_ROUNDS
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18 *
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19 * Number of rounds per execution
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20 * Nk - number of key bytes
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21 * Nb - blocksize (in bytes)
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22 */
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23 #define RIJNDAEL_NUM_ROUNDS(Nk, Nb) \
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24 (PR_MAX(Nk, Nb) + 6)
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25
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26 /* RIJNDAEL_MAX_STATE_SIZE
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27 *
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28 * Maximum number of bytes in the state (spec includes up to 256-bit block
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29 * size)
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30 */
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31 #define RIJNDAEL_MAX_STATE_SIZE 32
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32
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33 /*
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34 * This magic number is (Nb_max * (Nr_max + 1))
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35 * where Nb_max is the maximum block size in 32-bit words,
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36 * Nr_max is the maximum number of rounds, which is Nb_max + 6
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37 */
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38 #define RIJNDAEL_MAX_EXP_KEY_SIZE (8 * 15)
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39
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40 /* AESContextStr
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41 *
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42 * Values which maintain the state for Rijndael encryption/decryption.
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43 *
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44 * iv - initialization vector for CBC mode
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45 * Nb - the number of bytes in a block, specified by user
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46 * Nr - the number of rounds, specified by a table
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47 * expandedKey - the round keys in 4-byte words, the length is Nr * Nb
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48 * worker - the encryption/decryption function to use with worker_cx
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49 * destroy - if not NULL, the destroy function to use with worker_cx
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50 * worker_cx - the context for worker and destroy
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51 * isBlock - is the mode of operation a block cipher or a stream cipher?
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52 */
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53 struct AESContextStr
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54 {
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55 unsigned int Nb;
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56 unsigned int Nr;
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57 freeblCipherFunc worker;
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58 /* NOTE: The offsets of iv and expandedKey are hardcoded in intel-aes.s.
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59 * Don't add new members before them without updating intel-aes.s. */
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60 unsigned char iv[RIJNDAEL_MAX_BLOCKSIZE];
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61 PRUint32 expandedKey[RIJNDAEL_MAX_EXP_KEY_SIZE];
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62 freeblDestroyFunc destroy;
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63 void *worker_cx;
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64 PRBool isBlock;
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65 };
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66
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67 #endif /* _RIJNDAEL_H_ */
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