f4/crypto.h

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/** @defgroup crypto_defines CRYPTO Defines
 *
 * @brief <b>Defined constants and Types for the STM32F4xx Crypto Coprocessor</b>
 *
 * @ingroup STM32F4xx_defines
 *
 * @version 1.0.0
 *
 * @date 22 Jun 2013
 *
 * LGPL License Terms @ref lgpl_license
 */
 
/*
 * This file is part of the libopencm3 project.
 *
 * This library is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this library.  If not, see <http://www.gnu.org/licenses/>.
 */
 
#ifndef LIBOPENCM3_CRYPTO_H
#define LIBOPENCM3_CRYPTO_H
 
#include <libopencm3/stm32/common/crypto_common_f24.h>
 
/**@{*/
 
/* --- CRYP registers ------------------------------------------------------ */
/** @defgroup crypto_defines_registers Registers (for F42xx or F43xx only)
 *
 * @brief Register access to the CRYP controller. Registers for F42xx and 43xx
 *
 * @ingroup crypto_defines
 */
/**@{*/
 
/* CRYP_CSGCMCCMxR: Crypto context registers CCM mode, i=0-7*/
#define CRYP_CSGCMCCMR(i)       MMIO32(CRYP_BASE + 0x50 + (i) * 4)
 
/* CRYP_CSGCMxR: Crypto context registers all modes, i=0-7*/
#define CRYP_CSGCMR(i)          MMIO32(CRYP_BASE + 0x70 + (i) * 4)
 
/* --- CRYP_CR values ------------------------------------------------------ */
 
/* Only for part STM32F42xx and STM32F43xx: */
 
/* GCM_CMPH: GCM or CCM phase state */
#define CRYP_CR_GCM_CMPH_SHIFT          16
#define CRYP_CR_GCM_CMPH                (3 << CRYP_CR_GCM_CMPH_SHIFT)
#define CRYP_CR_GCM_CMPH_INIT           (0 << CRYP_CR_GCM_CMPH_SHIFT)
#define CRYP_CR_GCM_CMPH_HEADER         (1 << CRYP_CR_GCM_CMPH_SHIFT)
#define CRYP_CR_GCM_CMPH_PAYLOAD        (2 << CRYP_CR_GCM_CMPH_SHIFT)
#define CRYP_CR_GCM_CMPH_FINAL          (3 << CRYP_CR_GCM_CMPH_SHIFT)
 
/* ALGOMODE3: Algorithm mode, fourth bit */
#define CRYP_CR_ALGOMODE3       (1 << 19)
 
/**@}*/
 
/** @defgroup crypto_api API (for F42xx or F43xx only)
 *
 * @brief API for the CRYP controller.
 *
 * @warning Only for F42xx and 43xx
 *
 * @ingroup crypto_defines
 */
/**@{*/
 
enum crypto_mode_mac {
        ENCRYPT_GCM = CRYP_CR_ALGOMODE_TDES_ECB | CRYP_CR_ALGOMODE3,
        ENCRYPT_CCM = CRYP_CR_ALGOMODE_TDES_CBC | CRYP_CR_ALGOMODE3,
        DECRYPT_GCM = CRYP_CR_ALGOMODE_TDES_ECB | CRYP_CR_ALGOMODE3 |
                      CRYP_CR_ALGODIR,
        DECRYPT_CCM = CRYP_CR_ALGOMODE_TDES_CBC | CRYP_CR_ALGOMODE3 |
                      CRYP_CR_ALGODIR,
};
 
BEGIN_DECLS
 
void crypto_context_swap(uint32_t *buf);
void crypto_set_mac_algorithm(enum crypto_mode_mac mode);
 
END_DECLS
/**@}*/
/**@}*/
#endif