From 044ad7c3987460ede48ff27afd6bdb0ca05a0432 Mon Sep 17 00:00:00 2001 From: Harald Welte Date: Mon, 4 Jul 2011 20:52:54 +0200 Subject: import at91lib from at91lib_20100901_softpack_1_9_v_1_0_svn_v15011 it's sad to see that atmel doesn't publish their svn repo or has a centralized location or even puts proper version/release info into the library itself --- peripherals/tdes/tdes.c | 228 ++++++++++++++++++++++++++++++++++++++++++++++++ peripherals/tdes/tdes.h | 80 +++++++++++++++++ 2 files changed, 308 insertions(+) create mode 100644 peripherals/tdes/tdes.c create mode 100644 peripherals/tdes/tdes.h (limited to 'peripherals/tdes') diff --git a/peripherals/tdes/tdes.c b/peripherals/tdes/tdes.c new file mode 100644 index 0000000..4d78e1a --- /dev/null +++ b/peripherals/tdes/tdes.c @@ -0,0 +1,228 @@ +/* ---------------------------------------------------------------------------- + * ATMEL Microcontroller Software Support + * ---------------------------------------------------------------------------- + * Copyright (c) 2008, Atmel Corporation + * + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * - Redistributions of source code must retain the above copyright notice, + * this list of conditions and the disclaimer below. + * + * Atmel's name may not be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE + * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, + * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, + * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * ---------------------------------------------------------------------------- + */ + +//------------------------------------------------------------------------------ +// Headers +//------------------------------------------------------------------------------ + +#include "tdes.h" +#include +#include +#include + +//------------------------------------------------------------------------------ +// Global functions +//------------------------------------------------------------------------------ + +//------------------------------------------------------------------------------ +/// Configures the triple-DES peripheral to cipher/decipher, use single-DES or +/// triple-DES, use two or three keys (when in triple-DES mode), start manually, +/// automatically or via the PDC and use the given operating mode (ECB, CBC, +/// CFB or OFB). +/// \param cipher Encrypts if 1, decrypts if 0. +/// \param tdesmod Single- or triple-DES mode. +/// \param keymod Use two or three keys (must be 0 in single-DES mode). +/// \param smod Start mode. +/// \param opmod Encryption/decryption mode. +//------------------------------------------------------------------------------ +void TDES_Configure( + unsigned char cipher, + unsigned int tdesmod, + unsigned int keymod, + unsigned int smod, + unsigned int opmod) +{ + TRACE_DEBUG("TDES_Configure()\n\r"); + SANITY_CHECK((cipher & 0xFFFFFFFE) == 0); + SANITY_CHECK((tdesmod & 0xFFFFFFFD) == 0); + SANITY_CHECK((keymod & 0xFFFFFFEF) == 0); + SANITY_CHECK((smod & 0xFFFFFCFF) == 0); + SANITY_CHECK((opmod & 0xFFFFCFFF) == 0); + + // Reset peripheral + AT91C_BASE_TDES->TDES_CR = AT91C_TDES_SWRST; + + // Configure mode register + AT91C_BASE_TDES->TDES_MR = cipher | tdesmod | keymod | smod | opmod; +} + +//------------------------------------------------------------------------------ +/// Starts the encryption or decryption process if the TDES peripheral is +/// configured in manual or PDC mode. +//------------------------------------------------------------------------------ +void TDES_Start(void) +{ + TRACE_DEBUG("TDES_Start()\n\r"); + SANITY_CHECK(((AT91C_BASE_TDES->TDES_MR & AT91C_TDES_SMOD) == AT91C_TDES_SMOD_MANUAL) + || ((AT91C_BASE_TDES->TDES_MR & AT91C_TDES_SMOD) == AT91C_TDES_SMOD_PDC)); + + // Manual mode + if ((AT91C_BASE_TDES->TDES_MR & AT91C_TDES_SMOD) == AT91C_TDES_SMOD_MANUAL) { + + AT91C_BASE_TDES->TDES_CR = AT91C_TDES_START; + } + // PDC mode + else { + + AT91C_BASE_TDES->TDES_PTCR = AT91C_PDC_RXTEN | AT91C_PDC_TXTEN; + } +} + +//------------------------------------------------------------------------------ +/// Returns the current status register value of the TDES peripheral. +//------------------------------------------------------------------------------ +unsigned int TDES_GetStatus(void) +{ + TRACE_DEBUG("TDES_GetStatus()\n\r"); + + return AT91C_BASE_TDES->TDES_ISR; +} + +//------------------------------------------------------------------------------ +/// Sets the 64-bits keys (one, two or three depending on the configuration) +/// that shall be used by the TDES algorithm. +/// \param pKey1 Pointer to key #1. +/// \param pKey2 Pointer to key #2 (shall be 0 in single-DES mode). +/// \param pKey3 Pointer to key #3 (shall be 0 when using two keys). +//------------------------------------------------------------------------------ +void TDES_SetKeys( + const unsigned int *pKey1, + const unsigned int *pKey2, + const unsigned int *pKey3) +{ + TRACE_DEBUG("TDES_SetKeys()\n\r"); + SANITY_CHECK(pKey1); + SANITY_CHECK((pKey2 && ((AT91C_BASE_TDES->TDES_MR & AT91C_TDES_TDESMOD) == AT91C_TDES_TDESMOD)) + || (!pKey2 && ((AT91C_BASE_TDES->TDES_MR & AT91C_TDES_TDESMOD) == 0))); + SANITY_CHECK((pKey3 + && ((AT91C_BASE_TDES->TDES_MR & AT91C_TDES_TDESMOD) == AT91C_TDES_TDESMOD) + && ((AT91C_BASE_TDES->TDES_MR & AT91C_TDES_KEYMOD) == 0)) + || + (!pKey3 + && ((AT91C_BASE_TDES->TDES_MR & AT91C_TDES_TDESMOD) == AT91C_TDES_TDESMOD) + && ((AT91C_BASE_TDES->TDES_MR & AT91C_TDES_KEYMOD) == AT91C_TDES_KEYMOD)) + || + (!pKey3 + && ((AT91C_BASE_TDES->TDES_MR & AT91C_TDES_TDESMOD) == 0) + && ((AT91C_BASE_TDES->TDES_MR & AT91C_TDES_KEYMOD) == 0))); + + // Write key #1 + if (pKey1) { + + AT91C_BASE_TDES->TDES_KEY1WxR[0] = pKey1[0]; + AT91C_BASE_TDES->TDES_KEY1WxR[1] = pKey1[1]; + } + + // Write key #2 + if (pKey1) { + + AT91C_BASE_TDES->TDES_KEY2WxR[0] = pKey2[0]; + AT91C_BASE_TDES->TDES_KEY2WxR[1] = pKey2[1]; + } + + // Write key #2 + if (pKey1) { + + AT91C_BASE_TDES->TDES_KEY3WxR[0] = pKey3[0]; + AT91C_BASE_TDES->TDES_KEY3WxR[1] = pKey3[1]; + } +} + +//------------------------------------------------------------------------------ +/// Sets the input data to encrypt/decrypt using TDES. +/// \param pInput Pointer to the 64-bits input data. +//------------------------------------------------------------------------------ +void TDES_SetInputData(const unsigned int *pInput) +{ + TRACE_DEBUG("TDES_SetInputData()\n\r"); + SANITY_CHECK(pInput); + + AT91C_BASE_TDES->TDES_IDATAxR[0] = pInput[0]; + AT91C_BASE_TDES->TDES_IDATAxR[1] = pInput[1]; +} + +//------------------------------------------------------------------------------ +/// Sets the input data buffer to encrypt/decrypt when in PDC mode. +/// \param pInput Pointer to the input data. +/// \param size Size of buffer in bytes. +//------------------------------------------------------------------------------ +void TDES_SetInputBuffer(const unsigned int *pInput, unsigned int size) +{ + TRACE_DEBUG("TDES_SetInputBuffer()\n\r"); + SANITY_CHECK(pInput); + SANITY_CHECK((size > 0) && ((size % 8) == 0)); + + AT91C_BASE_TDES->TDES_TPR = (unsigned int) pInput; + AT91C_BASE_TDES->TDES_TCR = size / 4; +} + +//------------------------------------------------------------------------------ +/// Stores the output data from the last TDES operation into the given 64-bits +/// buffers. +/// \param pOutput Pointer to a 64-bits output buffer. +//------------------------------------------------------------------------------ +void TDES_GetOutputData(unsigned int *pOutput) +{ + TRACE_DEBUG("TDES_GetOutputData()\n\r"); + SANITY_CHECK(pOutput); + + pOutput[0] = AT91C_BASE_TDES->TDES_ODATAxR[0]; + pOutput[1] = AT91C_BASE_TDES->TDES_ODATAxR[1]; +} + +//------------------------------------------------------------------------------ +/// Sets the output buffer which will receive the encrypted/decrypted data when +/// using the PDC. +/// \param pOutput Pointer to the output data. +/// \param size Size of buffer in bytes. +//------------------------------------------------------------------------------ +void TDES_SetOutputBuffer(unsigned int *pOutput, unsigned int size) +{ + TRACE_DEBUG("TDES_SetOutputBuffer()\n\r"); + SANITY_CHECK(pOutput); + SANITY_CHECK((size > 0) && ((size % 8) == 0)); + + AT91C_BASE_TDES->TDES_RPR = (unsigned int) pOutput; + AT91C_BASE_TDES->TDES_RCR = size / 4; +} + +//------------------------------------------------------------------------------ +/// Sets the initialization vector to use when the TDES algorithm is configured +/// in a chained block mode (CBC, CFB or OFB). +/// \param pVector Pointer to the 64-bits vector. +//------------------------------------------------------------------------------ +void TDES_SetVector(const unsigned int *pVector) +{ + TRACE_DEBUG("TDES_SetVector()\n\r"); + SANITY_CHECK(pVector); + + AT91C_BASE_TDES->TDES_IVxR[0] = pVector[0]; + AT91C_BASE_TDES->TDES_IVxR[1] = pVector[1]; +} + diff --git a/peripherals/tdes/tdes.h b/peripherals/tdes/tdes.h new file mode 100644 index 0000000..cc0b9f6 --- /dev/null +++ b/peripherals/tdes/tdes.h @@ -0,0 +1,80 @@ +/* ---------------------------------------------------------------------------- + * ATMEL Microcontroller Software Support + * ---------------------------------------------------------------------------- + * Copyright (c) 2008, Atmel Corporation + * + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * - Redistributions of source code must retain the above copyright notice, + * this list of conditions and the disclaimer below. + * + * Atmel's name may not be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE + * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, + * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, + * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * ---------------------------------------------------------------------------- + */ + +#ifndef TDES_H +#define TDES_H + +//------------------------------------------------------------------------------ +/// \unit +/// +/// !Purpose +/// +/// Methods to manage the Triple DES (3DES) +/// +/// !Usage +/// +/// -# Configure TDES +/// -# Sets the key used by the TDES algorithm +/// -# Sets the input data of the TDES algorithm +/// -# Starts the encryption/decryption process +/// -# Stores the result of the last TDES operation +/// +//------------------------------------------------------------------------------ + +//------------------------------------------------------------------------------ +// Global functions +//------------------------------------------------------------------------------ + +extern void TDES_Configure( + unsigned char cipher, + unsigned int tdesmod, + unsigned int keymod, + unsigned int smod, + unsigned int opmod); + +extern void TDES_Start(void); + +extern unsigned int TDES_GetStatus(void); + +extern void TDES_SetKeys( + const unsigned int *pKey1, + const unsigned int *pKey2, + const unsigned int *pKey3); + +extern void TDES_SetInputData(const unsigned int *pInput); + +extern void TDES_SetInputBuffer(const unsigned int *pInput, unsigned int size); + +extern void TDES_GetOutputData(unsigned int *pOutput); + +extern void TDES_SetOutputBuffer(unsigned int *pOutput, unsigned int size); + +extern void TDES_SetVector(const unsigned int *pVector); + +#endif //#ifndef TDES_H -- cgit v1.2.3