The Tor Browser: security/nss/lib/freebl/rijndael.h@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     1 /* This Source Code Form is subject to the terms of the Mozilla Public

     2  * License, v. 2.0. If a copy of the MPL was not distributed with this

     3  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     5 #ifndef _RIJNDAEL_H_

     6 #define _RIJNDAEL_H_ 1

     8 #include "blapii.h"

    10 #define RIJNDAEL_MIN_BLOCKSIZE 16 /* bytes */

    11 #define RIJNDAEL_MAX_BLOCKSIZE 32 /* bytes */

    13 typedef SECStatus AESBlockFunc(AESContext *cx,

    14                                unsigned char *output,

    15                                const unsigned char *input);

    17 /* RIJNDAEL_NUM_ROUNDS

    18  *

    19  * Number of rounds per execution

    20  * Nk - number of key bytes

    21  * Nb - blocksize (in bytes)

    22  */

    23 #define RIJNDAEL_NUM_ROUNDS(Nk, Nb) \

    24     (PR_MAX(Nk, Nb) + 6)

    26 /* RIJNDAEL_MAX_STATE_SIZE

    27  *

    28  * Maximum number of bytes in the state (spec includes up to 256-bit block

    29  * size)

    30  */

    31 #define RIJNDAEL_MAX_STATE_SIZE 32

    33 /*

    34  * This magic number is (Nb_max * (Nr_max + 1))

    35  * where Nb_max is the maximum block size in 32-bit words,

    36  *       Nr_max is the maximum number of rounds, which is Nb_max + 6

    37  */

    38 #define RIJNDAEL_MAX_EXP_KEY_SIZE (8 * 15)

    40 /* AESContextStr

    41  *

    42  * Values which maintain the state for Rijndael encryption/decryption.

    43  *

    44  * iv          - initialization vector for CBC mode

    45  * Nb          - the number of bytes in a block, specified by user

    46  * Nr          - the number of rounds, specified by a table

    47  * expandedKey - the round keys in 4-byte words, the length is Nr * Nb

    48  * worker      - the encryption/decryption function to use with worker_cx

    49  * destroy     - if not NULL, the destroy function to use with worker_cx

    50  * worker_cx   - the context for worker and destroy

    51  * isBlock     - is the mode of operation a block cipher or a stream cipher?

    52  */

    53 struct AESContextStr

    54 {

    55     unsigned int   Nb;

    56     unsigned int   Nr;

    57     freeblCipherFunc worker;

    58     /* NOTE: The offsets of iv and expandedKey are hardcoded in intel-aes.s.

    59      * Don't add new members before them without updating intel-aes.s. */

    60     unsigned char iv[RIJNDAEL_MAX_BLOCKSIZE];

    61     PRUint32      expandedKey[RIJNDAEL_MAX_EXP_KEY_SIZE];

    62     freeblDestroyFunc destroy;

    63     void	      *worker_cx;

    64     PRBool	      isBlock;

    65 };

    67 #endif /* _RIJNDAEL_H_ */

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