#ifndef _AES_H
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#define _AES_H
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#define BPOLY 0x1b //!< Lower 8 bits of (x^8+x^4+x^3+x+1), ie. (x^4+x^3+x+1).
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#define BLOCKSIZE 16 //!< Block size in number of bytes.
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#define KEY_COUNT 3
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#if KEY_COUNT == 1
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#define KEYBITS 128 //!< Use AES128.
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#elif KEY_COUNT == 2
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#define KEYBITS 192 //!< Use AES196.
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#elif KEY_COUNT == 3
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#define KEYBITS 256 //!< Use AES256.
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#else
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#error Use 1, 2 or 3 keys!
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#endif
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#if KEYBITS == 128
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#define ROUNDS 10 //!< Number of rounds.
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#define KEYLENGTH 16 //!< Key length in number of bytes.
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#elif KEYBITS == 192
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#define ROUNDS 12 //!< Number of rounds.
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#define KEYLENGTH 24 //!< // Key length in number of bytes.
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#elif KEYBITS == 256
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#define ROUNDS 14 //!< Number of rounds.
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#define KEYLENGTH 32 //!< Key length in number of bytes.
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#else
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#error Key must be 128, 192 or 256 bits!
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#endif
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extern unsigned char *expandedKey;
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extern void aesEncInit(void);
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extern void aesEncrypt( unsigned char * buffer, unsigned char * chainBlock );
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extern void aesDecInit(void);
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extern void aesDecrypt( unsigned char * buffer, unsigned char * chainBlock );
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#endif
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