125 lines
4.9 KiB
C
125 lines
4.9 KiB
C
/**************************************************************************************************
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Filename: hal_aes.h
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Revised: $Date: 2010-01-08 13:24:55 -0800 (Fri, 08 Jan 2010) $
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Revision: $Revision: 21463 $
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Description: Support for HW/SW AES encryption.
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Copyright 2007-2010 Texas Instruments Incorporated. All rights reserved.
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IMPORTANT: Your use of this Software is limited to those specific rights
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granted under the terms of a software license agreement between the user
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who downloaded the software, his/her employer (which must be your employer)
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and Texas Instruments Incorporated (the "License"). You may not use this
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Software unless you agree to abide by the terms of the License. The License
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limits your use, and you acknowledge, that the Software may not be modified,
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copied or distributed unless embedded on a Texas Instruments microcontroller
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or used solely and exclusively in conjunction with a Texas Instruments radio
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frequency transceiver, which is integrated into your product. Other than for
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the foregoing purpose, you may not use, reproduce, copy, prepare derivative
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works of, modify, distribute, perform, display or sell this Software and/or
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its documentation for any purpose.
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YOU FURTHER ACKNOWLEDGE AND AGREE THAT THE SOFTWARE AND DOCUMENTATION ARE
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PROVIDED “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED,
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INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY, TITLE,
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NON-INFRINGEMENT AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL
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TEXAS INSTRUMENTS OR ITS LICENSORS BE LIABLE OR OBLIGATED UNDER CONTRACT,
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NEGLIGENCE, STRICT LIABILITY, CONTRIBUTION, BREACH OF WARRANTY, OR OTHER
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LEGAL EQUITABLE THEORY ANY DIRECT OR INDIRECT DAMAGES OR EXPENSES
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INCLUDING BUT NOT LIMITED TO ANY INCIDENTAL, SPECIAL, INDIRECT, PUNITIVE
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OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, COST OF PROCUREMENT
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OF SUBSTITUTE GOODS, TECHNOLOGY, SERVICES, OR ANY CLAIMS BY THIRD PARTIES
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(INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), OR OTHER SIMILAR COSTS.
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Should you have any questions regarding your right to use this Software,
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contact Texas Instruments Incorporated at www.TI.com.
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**************************************************************************************************/
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#ifndef HAL_AES_H_
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#define HAL_AES_H_
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#include "ZComDef.h"
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#define STATE_BLENGTH 16 // Number of bytes in State
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#define KEY_BLENGTH 16 // Number of bytes in Key
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#define KEY_EXP_LENGTH 176 // Nb * (Nr+1) * 4
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/* AES Engine is default to hardware AES. To turn on software AES, #define one of the followings:
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* #define SOFTWARE_AES TRUE, uses software aes ( slowest setting )
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* #define SW_AES_AND_KEY_EXP TRUE, enables software aes with key expansion ( improves speed at the cost of 176 bytes of data (RAM) )
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*/
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#if ((defined SOFTWARE_AES) && (SOFTWARE_AES == TRUE)) && ((defined SW_AES_AND_KEY_EXP) && (SW_AES_AND_KEY_EXP == TRUE))
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#error "SOFTWARE_AES and SW_AES_AND_KEY_EXP cannot be both defined."
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#endif
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extern void HalAesInit( void );
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extern void AesLoadBlock( uint8 * );
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extern void AesStartBlock( uint8 *, uint8 * );
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extern void AesStartShortBlock( uint8 *, uint8 * );
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extern void AesLoadIV(uint8 *);
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extern void AesDmaSetup( uint8 *, uint16, uint8 *, uint16 );
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extern void AesLoadKey( uint8 * );
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extern void (*pSspAesEncrypt)( uint8 *, uint8 * );
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extern void ssp_HW_KeyInit (uint8 *);
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extern void sspKeyExpansion (uint8 *, uint8 *);
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extern void sspAesEncryptHW (uint8 *, uint8 *);
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extern void sspAesEncryptKeyExp (uint8 *, uint8 *);
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extern void sspAesEncryptBasic (uint8 *, uint8 *);
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extern void sspAesEncrypt( uint8 *key, uint8 *buf );
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#define AES_BUSY 0x08
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#define ENCRYPT 0x00
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#define DECRYPT 0x01
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// Macro for setting the mode of the AES operation
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#define AES_SETMODE(mode) do { ENCCS &= ~0x70; ENCCS |= mode; } while (0)
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// _mode_ is one of
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#define CBC 0x00
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#define CFB 0x10
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#define OFB 0x20
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#define CTR 0x30
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#define ECB 0x40
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#define CBC_MAC 0x50
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// Macro for starting or stopping encryption or decryption
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#define AES_SET_ENCR_DECR_KEY_IV(mode) \
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do { \
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ENCCS = (ENCCS & ~0x07) | mode \
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} while(0)
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// Where _mode_ is one of
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#define AES_ENCRYPT 0x00;
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#define AES_DECRYPT 0x02;
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#define AES_LOAD_KEY 0x04;
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#define AES_LOAD_IV 0x06;
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// Macro for starting the AES module for either encryption, decryption,
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// key or initialisation vector loading.
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#define AES_START() ENCCS |= 0x01
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/* Used by DMA macros to shift 1 to create a mask for DMA registers. */
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#define HAL_DMA_AES_IN 1
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#define HAL_DMA_AES_OUT 2
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/* AES registers */
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#define HAL_AES_IN_ADDR 0x70B1
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#define HAL_AES_OUT_ADDR 0x70B2
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#if !defined (HAL_AES_DMA) || (HAL_AES_DMA == FALSE)
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#define HAL_AES_DELAY() \
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do { \
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uint8 delay = 15; \
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while(delay--); \
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} while(0)
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#endif
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// End of CC2530 hardware AES engine definitions
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#endif // HAL_AES_H_
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