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69 lines
2.2 KiB
C
69 lines
2.2 KiB
C
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef _RIJNDAEL_H_
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#define _RIJNDAEL_H_ 1
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#include "blapii.h"
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#include <stdint.h>
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#ifdef NSS_X86_OR_X64
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#include <wmmintrin.h> /* aes-ni */
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#endif
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typedef void AESBlockFunc(AESContext *cx,
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unsigned char *output,
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const unsigned char *input);
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/* RIJNDAEL_NUM_ROUNDS
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*
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* Number of rounds per execution
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* Nk - number of key bytes
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* Nb - blocksize (in bytes)
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*/
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#define RIJNDAEL_NUM_ROUNDS(Nk, Nb) \
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(PR_MAX(Nk, Nb) + 6)
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/*
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* This magic number is (Nb_max * (Nr_max + 1))
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* where Nb_max is the maximum block size in 32-bit words,
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* Nr_max is the maximum number of rounds, which is Nb_max + 6
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*/
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#define RIJNDAEL_MAX_EXP_KEY_SIZE (4 * 15)
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/* AESContextStr
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*
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* Values which maintain the state for Rijndael encryption/decryption.
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*
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* keySchedule - 128-bit registers for the key-schedule
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* iv - initialization vector for CBC mode
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* Nb - the number of bytes in a block, specified by user
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* Nr - the number of rounds, specified by a table
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* expandedKey - the round keys in 4-byte words, the length is Nr * Nb
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* worker - the encryption/decryption function to use with worker_cx
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* destroy - if not NULL, the destroy function to use with worker_cx
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* worker_cx - the context for worker and destroy
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* isBlock - is the mode of operation a block cipher or a stream cipher?
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*/
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struct AESContextStr {
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/* NOTE: Offsets to members in this struct are hardcoded in assembly.
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* Don't change the struct without updating intel-aes.s and intel-gcm.s. */
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union {
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#if defined(NSS_X86_OR_X64)
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__m128i keySchedule[15];
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#endif
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PRUint32 expandedKey[RIJNDAEL_MAX_EXP_KEY_SIZE];
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};
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unsigned int Nb;
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unsigned int Nr;
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freeblCipherFunc worker;
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unsigned char iv[AES_BLOCK_SIZE];
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freeblDestroyFunc destroy;
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void *worker_cx;
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PRBool isBlock;
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int mode;
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void *mem; /* Start of the allocated memory to free. */
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};
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#endif /* _RIJNDAEL_H_ */
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